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llvm-for-llvmta/lib/Target/Mips/MipsSEISelLowering.cpp

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//===- MipsSEISelLowering.cpp - MipsSE DAG Lowering Interface -------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Subclass of MipsTargetLowering specialized for mips32/64.
//
//===----------------------------------------------------------------------===//
#include "MipsSEISelLowering.h"
#include "MipsMachineFunction.h"
#include "MipsRegisterInfo.h"
#include "MipsSubtarget.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Triple.h"
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/ISDOpcodes.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/SelectionDAGNodes.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/IntrinsicsMips.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MachineValueType.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <iterator>
#include <utility>
using namespace llvm;
#define DEBUG_TYPE "mips-isel"
static cl::opt<bool>
UseMipsTailCalls("mips-tail-calls", cl::Hidden,
cl::desc("MIPS: permit tail calls."), cl::init(false));
static cl::opt<bool> NoDPLoadStore("mno-ldc1-sdc1", cl::init(false),
cl::desc("Expand double precision loads and "
"stores to their single precision "
"counterparts"));
MipsSETargetLowering::MipsSETargetLowering(const MipsTargetMachine &TM,
const MipsSubtarget &STI)
: MipsTargetLowering(TM, STI) {
// Set up the register classes
addRegisterClass(MVT::i32, &Mips::GPR32RegClass);
if (Subtarget.isGP64bit())
addRegisterClass(MVT::i64, &Mips::GPR64RegClass);
if (Subtarget.hasDSP() || Subtarget.hasMSA()) {
// Expand all truncating stores and extending loads.
for (MVT VT0 : MVT::fixedlen_vector_valuetypes()) {
for (MVT VT1 : MVT::fixedlen_vector_valuetypes()) {
setTruncStoreAction(VT0, VT1, Expand);
setLoadExtAction(ISD::SEXTLOAD, VT0, VT1, Expand);
setLoadExtAction(ISD::ZEXTLOAD, VT0, VT1, Expand);
setLoadExtAction(ISD::EXTLOAD, VT0, VT1, Expand);
}
}
}
if (Subtarget.hasDSP()) {
MVT::SimpleValueType VecTys[2] = {MVT::v2i16, MVT::v4i8};
for (unsigned i = 0; i < array_lengthof(VecTys); ++i) {
addRegisterClass(VecTys[i], &Mips::DSPRRegClass);
// Expand all builtin opcodes.
for (unsigned Opc = 0; Opc < ISD::BUILTIN_OP_END; ++Opc)
setOperationAction(Opc, VecTys[i], Expand);
setOperationAction(ISD::ADD, VecTys[i], Legal);
setOperationAction(ISD::SUB, VecTys[i], Legal);
setOperationAction(ISD::LOAD, VecTys[i], Legal);
setOperationAction(ISD::STORE, VecTys[i], Legal);
setOperationAction(ISD::BITCAST, VecTys[i], Legal);
}
setTargetDAGCombine(ISD::SHL);
setTargetDAGCombine(ISD::SRA);
setTargetDAGCombine(ISD::SRL);
setTargetDAGCombine(ISD::SETCC);
setTargetDAGCombine(ISD::VSELECT);
if (Subtarget.hasMips32r2()) {
setOperationAction(ISD::ADDC, MVT::i32, Legal);
setOperationAction(ISD::ADDE, MVT::i32, Legal);
}
}
if (Subtarget.hasDSPR2())
setOperationAction(ISD::MUL, MVT::v2i16, Legal);
if (Subtarget.hasMSA()) {
addMSAIntType(MVT::v16i8, &Mips::MSA128BRegClass);
addMSAIntType(MVT::v8i16, &Mips::MSA128HRegClass);
addMSAIntType(MVT::v4i32, &Mips::MSA128WRegClass);
addMSAIntType(MVT::v2i64, &Mips::MSA128DRegClass);
addMSAFloatType(MVT::v8f16, &Mips::MSA128HRegClass);
addMSAFloatType(MVT::v4f32, &Mips::MSA128WRegClass);
addMSAFloatType(MVT::v2f64, &Mips::MSA128DRegClass);
// f16 is a storage-only type, always promote it to f32.
addRegisterClass(MVT::f16, &Mips::MSA128HRegClass);
setOperationAction(ISD::SETCC, MVT::f16, Promote);
setOperationAction(ISD::BR_CC, MVT::f16, Promote);
setOperationAction(ISD::SELECT_CC, MVT::f16, Promote);
setOperationAction(ISD::SELECT, MVT::f16, Promote);
setOperationAction(ISD::FADD, MVT::f16, Promote);
setOperationAction(ISD::FSUB, MVT::f16, Promote);
setOperationAction(ISD::FMUL, MVT::f16, Promote);
setOperationAction(ISD::FDIV, MVT::f16, Promote);
setOperationAction(ISD::FREM, MVT::f16, Promote);
setOperationAction(ISD::FMA, MVT::f16, Promote);
setOperationAction(ISD::FNEG, MVT::f16, Promote);
setOperationAction(ISD::FABS, MVT::f16, Promote);
setOperationAction(ISD::FCEIL, MVT::f16, Promote);
setOperationAction(ISD::FCOPYSIGN, MVT::f16, Promote);
setOperationAction(ISD::FCOS, MVT::f16, Promote);
setOperationAction(ISD::FP_EXTEND, MVT::f16, Promote);
setOperationAction(ISD::FFLOOR, MVT::f16, Promote);
setOperationAction(ISD::FNEARBYINT, MVT::f16, Promote);
setOperationAction(ISD::FPOW, MVT::f16, Promote);
setOperationAction(ISD::FPOWI, MVT::f16, Promote);
setOperationAction(ISD::FRINT, MVT::f16, Promote);
setOperationAction(ISD::FSIN, MVT::f16, Promote);
setOperationAction(ISD::FSINCOS, MVT::f16, Promote);
setOperationAction(ISD::FSQRT, MVT::f16, Promote);
setOperationAction(ISD::FEXP, MVT::f16, Promote);
setOperationAction(ISD::FEXP2, MVT::f16, Promote);
setOperationAction(ISD::FLOG, MVT::f16, Promote);
setOperationAction(ISD::FLOG2, MVT::f16, Promote);
setOperationAction(ISD::FLOG10, MVT::f16, Promote);
setOperationAction(ISD::FROUND, MVT::f16, Promote);
setOperationAction(ISD::FTRUNC, MVT::f16, Promote);
setOperationAction(ISD::FMINNUM, MVT::f16, Promote);
setOperationAction(ISD::FMAXNUM, MVT::f16, Promote);
setOperationAction(ISD::FMINIMUM, MVT::f16, Promote);
setOperationAction(ISD::FMAXIMUM, MVT::f16, Promote);
setTargetDAGCombine(ISD::AND);
setTargetDAGCombine(ISD::OR);
setTargetDAGCombine(ISD::SRA);
setTargetDAGCombine(ISD::VSELECT);
setTargetDAGCombine(ISD::XOR);
}
if (!Subtarget.useSoftFloat()) {
addRegisterClass(MVT::f32, &Mips::FGR32RegClass);
// When dealing with single precision only, use libcalls
if (!Subtarget.isSingleFloat()) {
if (Subtarget.isFP64bit())
addRegisterClass(MVT::f64, &Mips::FGR64RegClass);
else
addRegisterClass(MVT::f64, &Mips::AFGR64RegClass);
}
}
setOperationAction(ISD::SMUL_LOHI, MVT::i32, Custom);
setOperationAction(ISD::UMUL_LOHI, MVT::i32, Custom);
setOperationAction(ISD::MULHS, MVT::i32, Custom);
setOperationAction(ISD::MULHU, MVT::i32, Custom);
if (Subtarget.hasCnMips())
setOperationAction(ISD::MUL, MVT::i64, Legal);
else if (Subtarget.isGP64bit())
setOperationAction(ISD::MUL, MVT::i64, Custom);
if (Subtarget.isGP64bit()) {
setOperationAction(ISD::SMUL_LOHI, MVT::i64, Custom);
setOperationAction(ISD::UMUL_LOHI, MVT::i64, Custom);
setOperationAction(ISD::MULHS, MVT::i64, Custom);
setOperationAction(ISD::MULHU, MVT::i64, Custom);
setOperationAction(ISD::SDIVREM, MVT::i64, Custom);
setOperationAction(ISD::UDIVREM, MVT::i64, Custom);
}
setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::i64, Custom);
setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::i64, Custom);
setOperationAction(ISD::SDIVREM, MVT::i32, Custom);
setOperationAction(ISD::UDIVREM, MVT::i32, Custom);
setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
setOperationAction(ISD::LOAD, MVT::i32, Custom);
setOperationAction(ISD::STORE, MVT::i32, Custom);
setTargetDAGCombine(ISD::MUL);
setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::Other, Custom);
setOperationAction(ISD::INTRINSIC_VOID, MVT::Other, Custom);
if (Subtarget.hasMips32r2() && !Subtarget.useSoftFloat() &&
!Subtarget.hasMips64()) {
setOperationAction(ISD::BITCAST, MVT::i64, Custom);
}
if (NoDPLoadStore) {
setOperationAction(ISD::LOAD, MVT::f64, Custom);
setOperationAction(ISD::STORE, MVT::f64, Custom);
}
if (Subtarget.hasMips32r6()) {
// MIPS32r6 replaces the accumulator-based multiplies with a three register
// instruction
setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
setOperationAction(ISD::MUL, MVT::i32, Legal);
setOperationAction(ISD::MULHS, MVT::i32, Legal);
setOperationAction(ISD::MULHU, MVT::i32, Legal);
// MIPS32r6 replaces the accumulator-based division/remainder with separate
// three register division and remainder instructions.
setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
setOperationAction(ISD::SDIV, MVT::i32, Legal);
setOperationAction(ISD::UDIV, MVT::i32, Legal);
setOperationAction(ISD::SREM, MVT::i32, Legal);
setOperationAction(ISD::UREM, MVT::i32, Legal);
// MIPS32r6 replaces conditional moves with an equivalent that removes the
// need for three GPR read ports.
setOperationAction(ISD::SETCC, MVT::i32, Legal);
setOperationAction(ISD::SELECT, MVT::i32, Legal);
setOperationAction(ISD::SELECT_CC, MVT::i32, Expand);
setOperationAction(ISD::SETCC, MVT::f32, Legal);
setOperationAction(ISD::SELECT, MVT::f32, Legal);
setOperationAction(ISD::SELECT_CC, MVT::f32, Expand);
assert(Subtarget.isFP64bit() && "FR=1 is required for MIPS32r6");
setOperationAction(ISD::SETCC, MVT::f64, Legal);
setOperationAction(ISD::SELECT, MVT::f64, Custom);
setOperationAction(ISD::SELECT_CC, MVT::f64, Expand);
setOperationAction(ISD::BRCOND, MVT::Other, Legal);
// Floating point > and >= are supported via < and <=
setCondCodeAction(ISD::SETOGE, MVT::f32, Expand);
setCondCodeAction(ISD::SETOGT, MVT::f32, Expand);
setCondCodeAction(ISD::SETUGE, MVT::f32, Expand);
setCondCodeAction(ISD::SETUGT, MVT::f32, Expand);
setCondCodeAction(ISD::SETOGE, MVT::f64, Expand);
setCondCodeAction(ISD::SETOGT, MVT::f64, Expand);
setCondCodeAction(ISD::SETUGE, MVT::f64, Expand);
setCondCodeAction(ISD::SETUGT, MVT::f64, Expand);
}
if (Subtarget.hasMips64r6()) {
// MIPS64r6 replaces the accumulator-based multiplies with a three register
// instruction
setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
setOperationAction(ISD::MUL, MVT::i64, Legal);
setOperationAction(ISD::MULHS, MVT::i64, Legal);
setOperationAction(ISD::MULHU, MVT::i64, Legal);
// MIPS32r6 replaces the accumulator-based division/remainder with separate
// three register division and remainder instructions.
setOperationAction(ISD::SDIVREM, MVT::i64, Expand);
setOperationAction(ISD::UDIVREM, MVT::i64, Expand);
setOperationAction(ISD::SDIV, MVT::i64, Legal);
setOperationAction(ISD::UDIV, MVT::i64, Legal);
setOperationAction(ISD::SREM, MVT::i64, Legal);
setOperationAction(ISD::UREM, MVT::i64, Legal);
// MIPS64r6 replaces conditional moves with an equivalent that removes the
// need for three GPR read ports.
setOperationAction(ISD::SETCC, MVT::i64, Legal);
setOperationAction(ISD::SELECT, MVT::i64, Legal);
setOperationAction(ISD::SELECT_CC, MVT::i64, Expand);
}
computeRegisterProperties(Subtarget.getRegisterInfo());
}
const MipsTargetLowering *
llvm::createMipsSETargetLowering(const MipsTargetMachine &TM,
const MipsSubtarget &STI) {
return new MipsSETargetLowering(TM, STI);
}
const TargetRegisterClass *
MipsSETargetLowering::getRepRegClassFor(MVT VT) const {
if (VT == MVT::Untyped)
return Subtarget.hasDSP() ? &Mips::ACC64DSPRegClass : &Mips::ACC64RegClass;
return TargetLowering::getRepRegClassFor(VT);
}
// Enable MSA support for the given integer type and Register class.
void MipsSETargetLowering::
addMSAIntType(MVT::SimpleValueType Ty, const TargetRegisterClass *RC) {
addRegisterClass(Ty, RC);
// Expand all builtin opcodes.
for (unsigned Opc = 0; Opc < ISD::BUILTIN_OP_END; ++Opc)
setOperationAction(Opc, Ty, Expand);
setOperationAction(ISD::BITCAST, Ty, Legal);
setOperationAction(ISD::LOAD, Ty, Legal);
setOperationAction(ISD::STORE, Ty, Legal);
setOperationAction(ISD::EXTRACT_VECTOR_ELT, Ty, Custom);
setOperationAction(ISD::INSERT_VECTOR_ELT, Ty, Legal);
setOperationAction(ISD::BUILD_VECTOR, Ty, Custom);
setOperationAction(ISD::UNDEF, Ty, Legal);
setOperationAction(ISD::ADD, Ty, Legal);
setOperationAction(ISD::AND, Ty, Legal);
setOperationAction(ISD::CTLZ, Ty, Legal);
setOperationAction(ISD::CTPOP, Ty, Legal);
setOperationAction(ISD::MUL, Ty, Legal);
setOperationAction(ISD::OR, Ty, Legal);
setOperationAction(ISD::SDIV, Ty, Legal);
setOperationAction(ISD::SREM, Ty, Legal);
setOperationAction(ISD::SHL, Ty, Legal);
setOperationAction(ISD::SRA, Ty, Legal);
setOperationAction(ISD::SRL, Ty, Legal);
setOperationAction(ISD::SUB, Ty, Legal);
setOperationAction(ISD::SMAX, Ty, Legal);
setOperationAction(ISD::SMIN, Ty, Legal);
setOperationAction(ISD::UDIV, Ty, Legal);
setOperationAction(ISD::UREM, Ty, Legal);
setOperationAction(ISD::UMAX, Ty, Legal);
setOperationAction(ISD::UMIN, Ty, Legal);
setOperationAction(ISD::VECTOR_SHUFFLE, Ty, Custom);
setOperationAction(ISD::VSELECT, Ty, Legal);
setOperationAction(ISD::XOR, Ty, Legal);
if (Ty == MVT::v4i32 || Ty == MVT::v2i64) {
setOperationAction(ISD::FP_TO_SINT, Ty, Legal);
setOperationAction(ISD::FP_TO_UINT, Ty, Legal);
setOperationAction(ISD::SINT_TO_FP, Ty, Legal);
setOperationAction(ISD::UINT_TO_FP, Ty, Legal);
}
setOperationAction(ISD::SETCC, Ty, Legal);
setCondCodeAction(ISD::SETNE, Ty, Expand);
setCondCodeAction(ISD::SETGE, Ty, Expand);
setCondCodeAction(ISD::SETGT, Ty, Expand);
setCondCodeAction(ISD::SETUGE, Ty, Expand);
setCondCodeAction(ISD::SETUGT, Ty, Expand);
}
// Enable MSA support for the given floating-point type and Register class.
void MipsSETargetLowering::
addMSAFloatType(MVT::SimpleValueType Ty, const TargetRegisterClass *RC) {
addRegisterClass(Ty, RC);
// Expand all builtin opcodes.
for (unsigned Opc = 0; Opc < ISD::BUILTIN_OP_END; ++Opc)
setOperationAction(Opc, Ty, Expand);
setOperationAction(ISD::LOAD, Ty, Legal);
setOperationAction(ISD::STORE, Ty, Legal);
setOperationAction(ISD::BITCAST, Ty, Legal);
setOperationAction(ISD::EXTRACT_VECTOR_ELT, Ty, Legal);
setOperationAction(ISD::INSERT_VECTOR_ELT, Ty, Legal);
setOperationAction(ISD::BUILD_VECTOR, Ty, Custom);
if (Ty != MVT::v8f16) {
setOperationAction(ISD::FABS, Ty, Legal);
setOperationAction(ISD::FADD, Ty, Legal);
setOperationAction(ISD::FDIV, Ty, Legal);
setOperationAction(ISD::FEXP2, Ty, Legal);
setOperationAction(ISD::FLOG2, Ty, Legal);
setOperationAction(ISD::FMA, Ty, Legal);
setOperationAction(ISD::FMUL, Ty, Legal);
setOperationAction(ISD::FRINT, Ty, Legal);
setOperationAction(ISD::FSQRT, Ty, Legal);
setOperationAction(ISD::FSUB, Ty, Legal);
setOperationAction(ISD::VSELECT, Ty, Legal);
setOperationAction(ISD::SETCC, Ty, Legal);
setCondCodeAction(ISD::SETOGE, Ty, Expand);
setCondCodeAction(ISD::SETOGT, Ty, Expand);
setCondCodeAction(ISD::SETUGE, Ty, Expand);
setCondCodeAction(ISD::SETUGT, Ty, Expand);
setCondCodeAction(ISD::SETGE, Ty, Expand);
setCondCodeAction(ISD::SETGT, Ty, Expand);
}
}
SDValue MipsSETargetLowering::lowerSELECT(SDValue Op, SelectionDAG &DAG) const {
if(!Subtarget.hasMips32r6())
return MipsTargetLowering::LowerOperation(Op, DAG);
EVT ResTy = Op->getValueType(0);
SDLoc DL(Op);
// Although MTC1_D64 takes an i32 and writes an f64, the upper 32 bits of the
// floating point register are undefined. Not really an issue as sel.d, which
// is produced from an FSELECT node, only looks at bit 0.
SDValue Tmp = DAG.getNode(MipsISD::MTC1_D64, DL, MVT::f64, Op->getOperand(0));
return DAG.getNode(MipsISD::FSELECT, DL, ResTy, Tmp, Op->getOperand(1),
Op->getOperand(2));
}
bool MipsSETargetLowering::allowsMisalignedMemoryAccesses(
EVT VT, unsigned, unsigned, MachineMemOperand::Flags, bool *Fast) const {
MVT::SimpleValueType SVT = VT.getSimpleVT().SimpleTy;
if (Subtarget.systemSupportsUnalignedAccess()) {
// MIPS32r6/MIPS64r6 is required to support unaligned access. It's
// implementation defined whether this is handled by hardware, software, or
// a hybrid of the two but it's expected that most implementations will
// handle the majority of cases in hardware.
if (Fast)
*Fast = true;
return true;
}
switch (SVT) {
case MVT::i64:
case MVT::i32:
if (Fast)
*Fast = true;
return true;
default:
return false;
}
}
SDValue MipsSETargetLowering::LowerOperation(SDValue Op,
SelectionDAG &DAG) const {
switch(Op.getOpcode()) {
case ISD::LOAD: return lowerLOAD(Op, DAG);
case ISD::STORE: return lowerSTORE(Op, DAG);
case ISD::SMUL_LOHI: return lowerMulDiv(Op, MipsISD::Mult, true, true, DAG);
case ISD::UMUL_LOHI: return lowerMulDiv(Op, MipsISD::Multu, true, true, DAG);
case ISD::MULHS: return lowerMulDiv(Op, MipsISD::Mult, false, true, DAG);
case ISD::MULHU: return lowerMulDiv(Op, MipsISD::Multu, false, true, DAG);
case ISD::MUL: return lowerMulDiv(Op, MipsISD::Mult, true, false, DAG);
case ISD::SDIVREM: return lowerMulDiv(Op, MipsISD::DivRem, true, true, DAG);
case ISD::UDIVREM: return lowerMulDiv(Op, MipsISD::DivRemU, true, true,
DAG);
case ISD::INTRINSIC_WO_CHAIN: return lowerINTRINSIC_WO_CHAIN(Op, DAG);
case ISD::INTRINSIC_W_CHAIN: return lowerINTRINSIC_W_CHAIN(Op, DAG);
case ISD::INTRINSIC_VOID: return lowerINTRINSIC_VOID(Op, DAG);
case ISD::EXTRACT_VECTOR_ELT: return lowerEXTRACT_VECTOR_ELT(Op, DAG);
case ISD::BUILD_VECTOR: return lowerBUILD_VECTOR(Op, DAG);
case ISD::VECTOR_SHUFFLE: return lowerVECTOR_SHUFFLE(Op, DAG);
case ISD::SELECT: return lowerSELECT(Op, DAG);
case ISD::BITCAST: return lowerBITCAST(Op, DAG);
}
return MipsTargetLowering::LowerOperation(Op, DAG);
}
// Fold zero extensions into MipsISD::VEXTRACT_[SZ]EXT_ELT
//
// Performs the following transformations:
// - Changes MipsISD::VEXTRACT_[SZ]EXT_ELT to zero extension if its
// sign/zero-extension is completely overwritten by the new one performed by
// the ISD::AND.
// - Removes redundant zero extensions performed by an ISD::AND.
static SDValue performANDCombine(SDNode *N, SelectionDAG &DAG,
TargetLowering::DAGCombinerInfo &DCI,
const MipsSubtarget &Subtarget) {
if (!Subtarget.hasMSA())
return SDValue();
SDValue Op0 = N->getOperand(0);
SDValue Op1 = N->getOperand(1);
unsigned Op0Opcode = Op0->getOpcode();
// (and (MipsVExtract[SZ]Ext $a, $b, $c), imm:$d)
// where $d + 1 == 2^n and n == 32
// or $d + 1 == 2^n and n <= 32 and ZExt
// -> (MipsVExtractZExt $a, $b, $c)
if (Op0Opcode == MipsISD::VEXTRACT_SEXT_ELT ||
Op0Opcode == MipsISD::VEXTRACT_ZEXT_ELT) {
ConstantSDNode *Mask = dyn_cast<ConstantSDNode>(Op1);
if (!Mask)
return SDValue();
int32_t Log2IfPositive = (Mask->getAPIntValue() + 1).exactLogBase2();
if (Log2IfPositive <= 0)
return SDValue(); // Mask+1 is not a power of 2
SDValue Op0Op2 = Op0->getOperand(2);
EVT ExtendTy = cast<VTSDNode>(Op0Op2)->getVT();
unsigned ExtendTySize = ExtendTy.getSizeInBits();
unsigned Log2 = Log2IfPositive;
if ((Op0Opcode == MipsISD::VEXTRACT_ZEXT_ELT && Log2 >= ExtendTySize) ||
Log2 == ExtendTySize) {
SDValue Ops[] = { Op0->getOperand(0), Op0->getOperand(1), Op0Op2 };
return DAG.getNode(MipsISD::VEXTRACT_ZEXT_ELT, SDLoc(Op0),
Op0->getVTList(),
makeArrayRef(Ops, Op0->getNumOperands()));
}
}
return SDValue();
}
// Determine if the specified node is a constant vector splat.
//
// Returns true and sets Imm if:
// * N is a ISD::BUILD_VECTOR representing a constant splat
//
// This function is quite similar to MipsSEDAGToDAGISel::selectVSplat. The
// differences are that it assumes the MSA has already been checked and the
// arbitrary requirement for a maximum of 32-bit integers isn't applied (and
// must not be in order for binsri.d to be selectable).
static bool isVSplat(SDValue N, APInt &Imm, bool IsLittleEndian) {
BuildVectorSDNode *Node = dyn_cast<BuildVectorSDNode>(N.getNode());
if (!Node)
return false;
APInt SplatValue, SplatUndef;
unsigned SplatBitSize;
bool HasAnyUndefs;
if (!Node->isConstantSplat(SplatValue, SplatUndef, SplatBitSize, HasAnyUndefs,
8, !IsLittleEndian))
return false;
Imm = SplatValue;
return true;
}
// Test whether the given node is an all-ones build_vector.
static bool isVectorAllOnes(SDValue N) {
// Look through bitcasts. Endianness doesn't matter because we are looking
// for an all-ones value.
if (N->getOpcode() == ISD::BITCAST)
N = N->getOperand(0);
BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N);
if (!BVN)
return false;
APInt SplatValue, SplatUndef;
unsigned SplatBitSize;
bool HasAnyUndefs;
// Endianness doesn't matter in this context because we are looking for
// an all-ones value.
if (BVN->isConstantSplat(SplatValue, SplatUndef, SplatBitSize, HasAnyUndefs))
return SplatValue.isAllOnesValue();
return false;
}
// Test whether N is the bitwise inverse of OfNode.
static bool isBitwiseInverse(SDValue N, SDValue OfNode) {
if (N->getOpcode() != ISD::XOR)
return false;
if (isVectorAllOnes(N->getOperand(0)))
return N->getOperand(1) == OfNode;
if (isVectorAllOnes(N->getOperand(1)))
return N->getOperand(0) == OfNode;
return false;
}
// Perform combines where ISD::OR is the root node.
//
// Performs the following transformations:
// - (or (and $a, $mask), (and $b, $inv_mask)) => (vselect $mask, $a, $b)
// where $inv_mask is the bitwise inverse of $mask and the 'or' has a 128-bit
// vector type.
static SDValue performORCombine(SDNode *N, SelectionDAG &DAG,
TargetLowering::DAGCombinerInfo &DCI,
const MipsSubtarget &Subtarget) {
if (!Subtarget.hasMSA())
return SDValue();
EVT Ty = N->getValueType(0);
if (!Ty.is128BitVector())
return SDValue();
SDValue Op0 = N->getOperand(0);
SDValue Op1 = N->getOperand(1);
if (Op0->getOpcode() == ISD::AND && Op1->getOpcode() == ISD::AND) {
SDValue Op0Op0 = Op0->getOperand(0);
SDValue Op0Op1 = Op0->getOperand(1);
SDValue Op1Op0 = Op1->getOperand(0);
SDValue Op1Op1 = Op1->getOperand(1);
bool IsLittleEndian = !Subtarget.isLittle();
SDValue IfSet, IfClr, Cond;
bool IsConstantMask = false;
APInt Mask, InvMask;
// If Op0Op0 is an appropriate mask, try to find it's inverse in either
// Op1Op0, or Op1Op1. Keep track of the Cond, IfSet, and IfClr nodes, while
// looking.
// IfClr will be set if we find a valid match.
if (isVSplat(Op0Op0, Mask, IsLittleEndian)) {
Cond = Op0Op0;
IfSet = Op0Op1;
if (isVSplat(Op1Op0, InvMask, IsLittleEndian) &&
Mask.getBitWidth() == InvMask.getBitWidth() && Mask == ~InvMask)
IfClr = Op1Op1;
else if (isVSplat(Op1Op1, InvMask, IsLittleEndian) &&
Mask.getBitWidth() == InvMask.getBitWidth() && Mask == ~InvMask)
IfClr = Op1Op0;
IsConstantMask = true;
}
// If IfClr is not yet set, and Op0Op1 is an appropriate mask, try the same
// thing again using this mask.
// IfClr will be set if we find a valid match.
if (!IfClr.getNode() && isVSplat(Op0Op1, Mask, IsLittleEndian)) {
Cond = Op0Op1;
IfSet = Op0Op0;
if (isVSplat(Op1Op0, InvMask, IsLittleEndian) &&
Mask.getBitWidth() == InvMask.getBitWidth() && Mask == ~InvMask)
IfClr = Op1Op1;
else if (isVSplat(Op1Op1, InvMask, IsLittleEndian) &&
Mask.getBitWidth() == InvMask.getBitWidth() && Mask == ~InvMask)
IfClr = Op1Op0;
IsConstantMask = true;
}
// If IfClr is not yet set, try looking for a non-constant match.
// IfClr will be set if we find a valid match amongst the eight
// possibilities.
if (!IfClr.getNode()) {
if (isBitwiseInverse(Op0Op0, Op1Op0)) {
Cond = Op1Op0;
IfSet = Op1Op1;
IfClr = Op0Op1;
} else if (isBitwiseInverse(Op0Op1, Op1Op0)) {
Cond = Op1Op0;
IfSet = Op1Op1;
IfClr = Op0Op0;
} else if (isBitwiseInverse(Op0Op0, Op1Op1)) {
Cond = Op1Op1;
IfSet = Op1Op0;
IfClr = Op0Op1;
} else if (isBitwiseInverse(Op0Op1, Op1Op1)) {
Cond = Op1Op1;
IfSet = Op1Op0;
IfClr = Op0Op0;
} else if (isBitwiseInverse(Op1Op0, Op0Op0)) {
Cond = Op0Op0;
IfSet = Op0Op1;
IfClr = Op1Op1;
} else if (isBitwiseInverse(Op1Op1, Op0Op0)) {
Cond = Op0Op0;
IfSet = Op0Op1;
IfClr = Op1Op0;
} else if (isBitwiseInverse(Op1Op0, Op0Op1)) {
Cond = Op0Op1;
IfSet = Op0Op0;
IfClr = Op1Op1;
} else if (isBitwiseInverse(Op1Op1, Op0Op1)) {
Cond = Op0Op1;
IfSet = Op0Op0;
IfClr = Op1Op0;
}
}
// At this point, IfClr will be set if we have a valid match.
if (!IfClr.getNode())
return SDValue();
assert(Cond.getNode() && IfSet.getNode());
// Fold degenerate cases.
if (IsConstantMask) {
if (Mask.isAllOnesValue())
return IfSet;
else if (Mask == 0)
return IfClr;
}
// Transform the DAG into an equivalent VSELECT.
return DAG.getNode(ISD::VSELECT, SDLoc(N), Ty, Cond, IfSet, IfClr);
}
return SDValue();
}
static bool shouldTransformMulToShiftsAddsSubs(APInt C, EVT VT,
SelectionDAG &DAG,
const MipsSubtarget &Subtarget) {
// Estimate the number of operations the below transform will turn a
// constant multiply into. The number is approximately equal to the minimal
// number of powers of two that constant can be broken down to by adding
// or subtracting them.
//
// If we have taken more than 12[1] / 8[2] steps to attempt the
// optimization for a native sized value, it is more than likely that this
// optimization will make things worse.
//
// [1] MIPS64 requires 6 instructions at most to materialize any constant,
// multiplication requires at least 4 cycles, but another cycle (or two)
// to retrieve the result from the HI/LO registers.
//
// [2] For MIPS32, more than 8 steps is expensive as the constant could be
// materialized in 2 instructions, multiplication requires at least 4
// cycles, but another cycle (or two) to retrieve the result from the
// HI/LO registers.
//
// TODO:
// - MaxSteps needs to consider the `VT` of the constant for the current
// target.
// - Consider to perform this optimization after type legalization.
// That allows to remove a workaround for types not supported natively.
// - Take in account `-Os, -Oz` flags because this optimization
// increases code size.
unsigned MaxSteps = Subtarget.isABI_O32() ? 8 : 12;
SmallVector<APInt, 16> WorkStack(1, C);
unsigned Steps = 0;
unsigned BitWidth = C.getBitWidth();
while (!WorkStack.empty()) {
APInt Val = WorkStack.pop_back_val();
if (Val == 0 || Val == 1)
continue;
if (Steps >= MaxSteps)
return false;
if (Val.isPowerOf2()) {
++Steps;
continue;
}
APInt Floor = APInt(BitWidth, 1) << Val.logBase2();
APInt Ceil = Val.isNegative() ? APInt(BitWidth, 0)
: APInt(BitWidth, 1) << C.ceilLogBase2();
if ((Val - Floor).ule(Ceil - Val)) {
WorkStack.push_back(Floor);
WorkStack.push_back(Val - Floor);
} else {
WorkStack.push_back(Ceil);
WorkStack.push_back(Ceil - Val);
}
++Steps;
}
// If the value being multiplied is not supported natively, we have to pay
// an additional legalization cost, conservatively assume an increase in the
// cost of 3 instructions per step. This values for this heuristic were
// determined experimentally.
unsigned RegisterSize = DAG.getTargetLoweringInfo()
.getRegisterType(*DAG.getContext(), VT)
.getSizeInBits();
Steps *= (VT.getSizeInBits() != RegisterSize) * 3;
if (Steps > 27)
return false;
return true;
}
static SDValue genConstMult(SDValue X, APInt C, const SDLoc &DL, EVT VT,
EVT ShiftTy, SelectionDAG &DAG) {
// Return 0.
if (C == 0)
return DAG.getConstant(0, DL, VT);
// Return x.
if (C == 1)
return X;
// If c is power of 2, return (shl x, log2(c)).
if (C.isPowerOf2())
return DAG.getNode(ISD::SHL, DL, VT, X,
DAG.getConstant(C.logBase2(), DL, ShiftTy));
unsigned BitWidth = C.getBitWidth();
APInt Floor = APInt(BitWidth, 1) << C.logBase2();
APInt Ceil = C.isNegative() ? APInt(BitWidth, 0) :
APInt(BitWidth, 1) << C.ceilLogBase2();
// If |c - floor_c| <= |c - ceil_c|,
// where floor_c = pow(2, floor(log2(c))) and ceil_c = pow(2, ceil(log2(c))),
// return (add constMult(x, floor_c), constMult(x, c - floor_c)).
if ((C - Floor).ule(Ceil - C)) {
SDValue Op0 = genConstMult(X, Floor, DL, VT, ShiftTy, DAG);
SDValue Op1 = genConstMult(X, C - Floor, DL, VT, ShiftTy, DAG);
return DAG.getNode(ISD::ADD, DL, VT, Op0, Op1);
}
// If |c - floor_c| > |c - ceil_c|,
// return (sub constMult(x, ceil_c), constMult(x, ceil_c - c)).
SDValue Op0 = genConstMult(X, Ceil, DL, VT, ShiftTy, DAG);
SDValue Op1 = genConstMult(X, Ceil - C, DL, VT, ShiftTy, DAG);
return DAG.getNode(ISD::SUB, DL, VT, Op0, Op1);
}
static SDValue performMULCombine(SDNode *N, SelectionDAG &DAG,
const TargetLowering::DAGCombinerInfo &DCI,
const MipsSETargetLowering *TL,
const MipsSubtarget &Subtarget) {
EVT VT = N->getValueType(0);
if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1)))
if (!VT.isVector() && shouldTransformMulToShiftsAddsSubs(
C->getAPIntValue(), VT, DAG, Subtarget))
return genConstMult(N->getOperand(0), C->getAPIntValue(), SDLoc(N), VT,
TL->getScalarShiftAmountTy(DAG.getDataLayout(), VT),
DAG);
return SDValue(N, 0);
}
static SDValue performDSPShiftCombine(unsigned Opc, SDNode *N, EVT Ty,
SelectionDAG &DAG,
const MipsSubtarget &Subtarget) {
// See if this is a vector splat immediate node.
APInt SplatValue, SplatUndef;
unsigned SplatBitSize;
bool HasAnyUndefs;
unsigned EltSize = Ty.getScalarSizeInBits();
BuildVectorSDNode *BV = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
if (!Subtarget.hasDSP())
return SDValue();
if (!BV ||
!BV->isConstantSplat(SplatValue, SplatUndef, SplatBitSize, HasAnyUndefs,
EltSize, !Subtarget.isLittle()) ||
(SplatBitSize != EltSize) ||
(SplatValue.getZExtValue() >= EltSize))
return SDValue();
SDLoc DL(N);
return DAG.getNode(Opc, DL, Ty, N->getOperand(0),
DAG.getConstant(SplatValue.getZExtValue(), DL, MVT::i32));
}
static SDValue performSHLCombine(SDNode *N, SelectionDAG &DAG,
TargetLowering::DAGCombinerInfo &DCI,
const MipsSubtarget &Subtarget) {
EVT Ty = N->getValueType(0);
if ((Ty != MVT::v2i16) && (Ty != MVT::v4i8))
return SDValue();
return performDSPShiftCombine(MipsISD::SHLL_DSP, N, Ty, DAG, Subtarget);
}
// Fold sign-extensions into MipsISD::VEXTRACT_[SZ]EXT_ELT for MSA and fold
// constant splats into MipsISD::SHRA_DSP for DSPr2.
//
// Performs the following transformations:
// - Changes MipsISD::VEXTRACT_[SZ]EXT_ELT to sign extension if its
// sign/zero-extension is completely overwritten by the new one performed by
// the ISD::SRA and ISD::SHL nodes.
// - Removes redundant sign extensions performed by an ISD::SRA and ISD::SHL
// sequence.
//
// See performDSPShiftCombine for more information about the transformation
// used for DSPr2.
static SDValue performSRACombine(SDNode *N, SelectionDAG &DAG,
TargetLowering::DAGCombinerInfo &DCI,
const MipsSubtarget &Subtarget) {
EVT Ty = N->getValueType(0);
if (Subtarget.hasMSA()) {
SDValue Op0 = N->getOperand(0);
SDValue Op1 = N->getOperand(1);
// (sra (shl (MipsVExtract[SZ]Ext $a, $b, $c), imm:$d), imm:$d)
// where $d + sizeof($c) == 32
// or $d + sizeof($c) <= 32 and SExt
// -> (MipsVExtractSExt $a, $b, $c)
if (Op0->getOpcode() == ISD::SHL && Op1 == Op0->getOperand(1)) {
SDValue Op0Op0 = Op0->getOperand(0);
ConstantSDNode *ShAmount = dyn_cast<ConstantSDNode>(Op1);
if (!ShAmount)
return SDValue();
if (Op0Op0->getOpcode() != MipsISD::VEXTRACT_SEXT_ELT &&
Op0Op0->getOpcode() != MipsISD::VEXTRACT_ZEXT_ELT)
return SDValue();
EVT ExtendTy = cast<VTSDNode>(Op0Op0->getOperand(2))->getVT();
unsigned TotalBits = ShAmount->getZExtValue() + ExtendTy.getSizeInBits();
if (TotalBits == 32 ||
(Op0Op0->getOpcode() == MipsISD::VEXTRACT_SEXT_ELT &&
TotalBits <= 32)) {
SDValue Ops[] = { Op0Op0->getOperand(0), Op0Op0->getOperand(1),
Op0Op0->getOperand(2) };
return DAG.getNode(MipsISD::VEXTRACT_SEXT_ELT, SDLoc(Op0Op0),
Op0Op0->getVTList(),
makeArrayRef(Ops, Op0Op0->getNumOperands()));
}
}
}
if ((Ty != MVT::v2i16) && ((Ty != MVT::v4i8) || !Subtarget.hasDSPR2()))
return SDValue();
return performDSPShiftCombine(MipsISD::SHRA_DSP, N, Ty, DAG, Subtarget);
}
static SDValue performSRLCombine(SDNode *N, SelectionDAG &DAG,
TargetLowering::DAGCombinerInfo &DCI,
const MipsSubtarget &Subtarget) {
EVT Ty = N->getValueType(0);
if (((Ty != MVT::v2i16) || !Subtarget.hasDSPR2()) && (Ty != MVT::v4i8))
return SDValue();
return performDSPShiftCombine(MipsISD::SHRL_DSP, N, Ty, DAG, Subtarget);
}
static bool isLegalDSPCondCode(EVT Ty, ISD::CondCode CC) {
bool IsV216 = (Ty == MVT::v2i16);
switch (CC) {
case ISD::SETEQ:
case ISD::SETNE: return true;
case ISD::SETLT:
case ISD::SETLE:
case ISD::SETGT:
case ISD::SETGE: return IsV216;
case ISD::SETULT:
case ISD::SETULE:
case ISD::SETUGT:
case ISD::SETUGE: return !IsV216;
default: return false;
}
}
static SDValue performSETCCCombine(SDNode *N, SelectionDAG &DAG) {
EVT Ty = N->getValueType(0);
if ((Ty != MVT::v2i16) && (Ty != MVT::v4i8))
return SDValue();
if (!isLegalDSPCondCode(Ty, cast<CondCodeSDNode>(N->getOperand(2))->get()))
return SDValue();
return DAG.getNode(MipsISD::SETCC_DSP, SDLoc(N), Ty, N->getOperand(0),
N->getOperand(1), N->getOperand(2));
}
static SDValue performVSELECTCombine(SDNode *N, SelectionDAG &DAG) {
EVT Ty = N->getValueType(0);
if (Ty == MVT::v2i16 || Ty == MVT::v4i8) {
SDValue SetCC = N->getOperand(0);
if (SetCC.getOpcode() != MipsISD::SETCC_DSP)
return SDValue();
return DAG.getNode(MipsISD::SELECT_CC_DSP, SDLoc(N), Ty,
SetCC.getOperand(0), SetCC.getOperand(1),
N->getOperand(1), N->getOperand(2), SetCC.getOperand(2));
}
return SDValue();
}
static SDValue performXORCombine(SDNode *N, SelectionDAG &DAG,
const MipsSubtarget &Subtarget) {
EVT Ty = N->getValueType(0);
if (Subtarget.hasMSA() && Ty.is128BitVector() && Ty.isInteger()) {
// Try the following combines:
// (xor (or $a, $b), (build_vector allones))
// (xor (or $a, $b), (bitcast (build_vector allones)))
SDValue Op0 = N->getOperand(0);
SDValue Op1 = N->getOperand(1);
SDValue NotOp;
if (ISD::isBuildVectorAllOnes(Op0.getNode()))
NotOp = Op1;
else if (ISD::isBuildVectorAllOnes(Op1.getNode()))
NotOp = Op0;
else
return SDValue();
if (NotOp->getOpcode() == ISD::OR)
return DAG.getNode(MipsISD::VNOR, SDLoc(N), Ty, NotOp->getOperand(0),
NotOp->getOperand(1));
}
return SDValue();
}
SDValue
MipsSETargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const {
SelectionDAG &DAG = DCI.DAG;
SDValue Val;
switch (N->getOpcode()) {
case ISD::AND:
Val = performANDCombine(N, DAG, DCI, Subtarget);
break;
case ISD::OR:
Val = performORCombine(N, DAG, DCI, Subtarget);
break;
case ISD::MUL:
return performMULCombine(N, DAG, DCI, this, Subtarget);
case ISD::SHL:
Val = performSHLCombine(N, DAG, DCI, Subtarget);
break;
case ISD::SRA:
return performSRACombine(N, DAG, DCI, Subtarget);
case ISD::SRL:
return performSRLCombine(N, DAG, DCI, Subtarget);
case ISD::VSELECT:
return performVSELECTCombine(N, DAG);
case ISD::XOR:
Val = performXORCombine(N, DAG, Subtarget);
break;
case ISD::SETCC:
Val = performSETCCCombine(N, DAG);
break;
}
if (Val.getNode()) {
LLVM_DEBUG(dbgs() << "\nMipsSE DAG Combine:\n";
N->printrWithDepth(dbgs(), &DAG); dbgs() << "\n=> \n";
Val.getNode()->printrWithDepth(dbgs(), &DAG); dbgs() << "\n");
return Val;
}
return MipsTargetLowering::PerformDAGCombine(N, DCI);
}
MachineBasicBlock *
MipsSETargetLowering::EmitInstrWithCustomInserter(MachineInstr &MI,
MachineBasicBlock *BB) const {
switch (MI.getOpcode()) {
default:
return MipsTargetLowering::EmitInstrWithCustomInserter(MI, BB);
case Mips::BPOSGE32_PSEUDO:
return emitBPOSGE32(MI, BB);
case Mips::SNZ_B_PSEUDO:
return emitMSACBranchPseudo(MI, BB, Mips::BNZ_B);
case Mips::SNZ_H_PSEUDO:
return emitMSACBranchPseudo(MI, BB, Mips::BNZ_H);
case Mips::SNZ_W_PSEUDO:
return emitMSACBranchPseudo(MI, BB, Mips::BNZ_W);
case Mips::SNZ_D_PSEUDO:
return emitMSACBranchPseudo(MI, BB, Mips::BNZ_D);
case Mips::SNZ_V_PSEUDO:
return emitMSACBranchPseudo(MI, BB, Mips::BNZ_V);
case Mips::SZ_B_PSEUDO:
return emitMSACBranchPseudo(MI, BB, Mips::BZ_B);
case Mips::SZ_H_PSEUDO:
return emitMSACBranchPseudo(MI, BB, Mips::BZ_H);
case Mips::SZ_W_PSEUDO:
return emitMSACBranchPseudo(MI, BB, Mips::BZ_W);
case Mips::SZ_D_PSEUDO:
return emitMSACBranchPseudo(MI, BB, Mips::BZ_D);
case Mips::SZ_V_PSEUDO:
return emitMSACBranchPseudo(MI, BB, Mips::BZ_V);
case Mips::COPY_FW_PSEUDO:
return emitCOPY_FW(MI, BB);
case Mips::COPY_FD_PSEUDO:
return emitCOPY_FD(MI, BB);
case Mips::INSERT_FW_PSEUDO:
return emitINSERT_FW(MI, BB);
case Mips::INSERT_FD_PSEUDO:
return emitINSERT_FD(MI, BB);
case Mips::INSERT_B_VIDX_PSEUDO:
case Mips::INSERT_B_VIDX64_PSEUDO:
return emitINSERT_DF_VIDX(MI, BB, 1, false);
case Mips::INSERT_H_VIDX_PSEUDO:
case Mips::INSERT_H_VIDX64_PSEUDO:
return emitINSERT_DF_VIDX(MI, BB, 2, false);
case Mips::INSERT_W_VIDX_PSEUDO:
case Mips::INSERT_W_VIDX64_PSEUDO:
return emitINSERT_DF_VIDX(MI, BB, 4, false);
case Mips::INSERT_D_VIDX_PSEUDO:
case Mips::INSERT_D_VIDX64_PSEUDO:
return emitINSERT_DF_VIDX(MI, BB, 8, false);
case Mips::INSERT_FW_VIDX_PSEUDO:
case Mips::INSERT_FW_VIDX64_PSEUDO:
return emitINSERT_DF_VIDX(MI, BB, 4, true);
case Mips::INSERT_FD_VIDX_PSEUDO:
case Mips::INSERT_FD_VIDX64_PSEUDO:
return emitINSERT_DF_VIDX(MI, BB, 8, true);
case Mips::FILL_FW_PSEUDO:
return emitFILL_FW(MI, BB);
case Mips::FILL_FD_PSEUDO:
return emitFILL_FD(MI, BB);
case Mips::FEXP2_W_1_PSEUDO:
return emitFEXP2_W_1(MI, BB);
case Mips::FEXP2_D_1_PSEUDO:
return emitFEXP2_D_1(MI, BB);
case Mips::ST_F16:
return emitST_F16_PSEUDO(MI, BB);
case Mips::LD_F16:
return emitLD_F16_PSEUDO(MI, BB);
case Mips::MSA_FP_EXTEND_W_PSEUDO:
return emitFPEXTEND_PSEUDO(MI, BB, false);
case Mips::MSA_FP_ROUND_W_PSEUDO:
return emitFPROUND_PSEUDO(MI, BB, false);
case Mips::MSA_FP_EXTEND_D_PSEUDO:
return emitFPEXTEND_PSEUDO(MI, BB, true);
case Mips::MSA_FP_ROUND_D_PSEUDO:
return emitFPROUND_PSEUDO(MI, BB, true);
}
}
bool MipsSETargetLowering::isEligibleForTailCallOptimization(
const CCState &CCInfo, unsigned NextStackOffset,
const MipsFunctionInfo &FI) const {
if (!UseMipsTailCalls)
return false;
// Exception has to be cleared with eret.
if (FI.isISR())
return false;
// Return false if either the callee or caller has a byval argument.
if (CCInfo.getInRegsParamsCount() > 0 || FI.hasByvalArg())
return false;
// Return true if the callee's argument area is no larger than the
// caller's.
return NextStackOffset <= FI.getIncomingArgSize();
}
void MipsSETargetLowering::
getOpndList(SmallVectorImpl<SDValue> &Ops,
std::deque<std::pair<unsigned, SDValue>> &RegsToPass,
bool IsPICCall, bool GlobalOrExternal, bool InternalLinkage,
bool IsCallReloc, CallLoweringInfo &CLI, SDValue Callee,
SDValue Chain) const {
Ops.push_back(Callee);
MipsTargetLowering::getOpndList(Ops, RegsToPass, IsPICCall, GlobalOrExternal,
InternalLinkage, IsCallReloc, CLI, Callee,
Chain);
}
SDValue MipsSETargetLowering::lowerLOAD(SDValue Op, SelectionDAG &DAG) const {
LoadSDNode &Nd = *cast<LoadSDNode>(Op);
if (Nd.getMemoryVT() != MVT::f64 || !NoDPLoadStore)
return MipsTargetLowering::lowerLOAD(Op, DAG);
// Replace a double precision load with two i32 loads and a buildpair64.
SDLoc DL(Op);
SDValue Ptr = Nd.getBasePtr(), Chain = Nd.getChain();
EVT PtrVT = Ptr.getValueType();
// i32 load from lower address.
SDValue Lo = DAG.getLoad(MVT::i32, DL, Chain, Ptr, MachinePointerInfo(),
Nd.getAlignment(), Nd.getMemOperand()->getFlags());
// i32 load from higher address.
Ptr = DAG.getNode(ISD::ADD, DL, PtrVT, Ptr, DAG.getConstant(4, DL, PtrVT));
SDValue Hi = DAG.getLoad(
MVT::i32, DL, Lo.getValue(1), Ptr, MachinePointerInfo(),
std::min(Nd.getAlignment(), 4U), Nd.getMemOperand()->getFlags());
if (!Subtarget.isLittle())
std::swap(Lo, Hi);
SDValue BP = DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, Lo, Hi);
SDValue Ops[2] = {BP, Hi.getValue(1)};
return DAG.getMergeValues(Ops, DL);
}
SDValue MipsSETargetLowering::lowerSTORE(SDValue Op, SelectionDAG &DAG) const {
StoreSDNode &Nd = *cast<StoreSDNode>(Op);
if (Nd.getMemoryVT() != MVT::f64 || !NoDPLoadStore)
return MipsTargetLowering::lowerSTORE(Op, DAG);
// Replace a double precision store with two extractelement64s and i32 stores.
SDLoc DL(Op);
SDValue Val = Nd.getValue(), Ptr = Nd.getBasePtr(), Chain = Nd.getChain();
EVT PtrVT = Ptr.getValueType();
SDValue Lo = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
Val, DAG.getConstant(0, DL, MVT::i32));
SDValue Hi = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
Val, DAG.getConstant(1, DL, MVT::i32));
if (!Subtarget.isLittle())
std::swap(Lo, Hi);
// i32 store to lower address.
Chain =
DAG.getStore(Chain, DL, Lo, Ptr, MachinePointerInfo(), Nd.getAlignment(),
Nd.getMemOperand()->getFlags(), Nd.getAAInfo());
// i32 store to higher address.
Ptr = DAG.getNode(ISD::ADD, DL, PtrVT, Ptr, DAG.getConstant(4, DL, PtrVT));
return DAG.getStore(Chain, DL, Hi, Ptr, MachinePointerInfo(),
std::min(Nd.getAlignment(), 4U),
Nd.getMemOperand()->getFlags(), Nd.getAAInfo());
}
SDValue MipsSETargetLowering::lowerBITCAST(SDValue Op,
SelectionDAG &DAG) const {
SDLoc DL(Op);
MVT Src = Op.getOperand(0).getValueType().getSimpleVT();
MVT Dest = Op.getValueType().getSimpleVT();
// Bitcast i64 to double.
if (Src == MVT::i64 && Dest == MVT::f64) {
SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32,
Op.getOperand(0), DAG.getIntPtrConstant(0, DL));
SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32,
Op.getOperand(0), DAG.getIntPtrConstant(1, DL));
return DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, Lo, Hi);
}
// Bitcast double to i64.
if (Src == MVT::f64 && Dest == MVT::i64) {
SDValue Lo =
DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
DAG.getConstant(0, DL, MVT::i32));
SDValue Hi =
DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
DAG.getConstant(1, DL, MVT::i32));
return DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Lo, Hi);
}
// Skip other cases of bitcast and use default lowering.
return SDValue();
}
SDValue MipsSETargetLowering::lowerMulDiv(SDValue Op, unsigned NewOpc,
bool HasLo, bool HasHi,
SelectionDAG &DAG) const {
// MIPS32r6/MIPS64r6 removed accumulator based multiplies.
assert(!Subtarget.hasMips32r6());
EVT Ty = Op.getOperand(0).getValueType();
SDLoc DL(Op);
SDValue Mult = DAG.getNode(NewOpc, DL, MVT::Untyped,
Op.getOperand(0), Op.getOperand(1));
SDValue Lo, Hi;
if (HasLo)
Lo = DAG.getNode(MipsISD::MFLO, DL, Ty, Mult);
if (HasHi)
Hi = DAG.getNode(MipsISD::MFHI, DL, Ty, Mult);
if (!HasLo || !HasHi)
return HasLo ? Lo : Hi;
SDValue Vals[] = { Lo, Hi };
return DAG.getMergeValues(Vals, DL);
}
static SDValue initAccumulator(SDValue In, const SDLoc &DL, SelectionDAG &DAG) {
SDValue InLo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, In,
DAG.getConstant(0, DL, MVT::i32));
SDValue InHi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, MVT::i32, In,
DAG.getConstant(1, DL, MVT::i32));
return DAG.getNode(MipsISD::MTLOHI, DL, MVT::Untyped, InLo, InHi);
}
static SDValue extractLOHI(SDValue Op, const SDLoc &DL, SelectionDAG &DAG) {
SDValue Lo = DAG.getNode(MipsISD::MFLO, DL, MVT::i32, Op);
SDValue Hi = DAG.getNode(MipsISD::MFHI, DL, MVT::i32, Op);
return DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Lo, Hi);
}
// This function expands mips intrinsic nodes which have 64-bit input operands
// or output values.
//
// out64 = intrinsic-node in64
// =>
// lo = copy (extract-element (in64, 0))
// hi = copy (extract-element (in64, 1))
// mips-specific-node
// v0 = copy lo
// v1 = copy hi
// out64 = merge-values (v0, v1)
//
static SDValue lowerDSPIntr(SDValue Op, SelectionDAG &DAG, unsigned Opc) {
SDLoc DL(Op);
bool HasChainIn = Op->getOperand(0).getValueType() == MVT::Other;
SmallVector<SDValue, 3> Ops;
unsigned OpNo = 0;
// See if Op has a chain input.
if (HasChainIn)
Ops.push_back(Op->getOperand(OpNo++));
// The next operand is the intrinsic opcode.
assert(Op->getOperand(OpNo).getOpcode() == ISD::TargetConstant);
// See if the next operand has type i64.
SDValue Opnd = Op->getOperand(++OpNo), In64;
if (Opnd.getValueType() == MVT::i64)
In64 = initAccumulator(Opnd, DL, DAG);
else
Ops.push_back(Opnd);
// Push the remaining operands.
for (++OpNo ; OpNo < Op->getNumOperands(); ++OpNo)
Ops.push_back(Op->getOperand(OpNo));
// Add In64 to the end of the list.
if (In64.getNode())
Ops.push_back(In64);
// Scan output.
SmallVector<EVT, 2> ResTys;
for (EVT Ty : Op->values())
ResTys.push_back((Ty == MVT::i64) ? MVT::Untyped : Ty);
// Create node.
SDValue Val = DAG.getNode(Opc, DL, ResTys, Ops);
SDValue Out = (ResTys[0] == MVT::Untyped) ? extractLOHI(Val, DL, DAG) : Val;
if (!HasChainIn)
return Out;
assert(Val->getValueType(1) == MVT::Other);
SDValue Vals[] = { Out, SDValue(Val.getNode(), 1) };
return DAG.getMergeValues(Vals, DL);
}
// Lower an MSA copy intrinsic into the specified SelectionDAG node
static SDValue lowerMSACopyIntr(SDValue Op, SelectionDAG &DAG, unsigned Opc) {
SDLoc DL(Op);
SDValue Vec = Op->getOperand(1);
SDValue Idx = Op->getOperand(2);
EVT ResTy = Op->getValueType(0);
EVT EltTy = Vec->getValueType(0).getVectorElementType();
SDValue Result = DAG.getNode(Opc, DL, ResTy, Vec, Idx,
DAG.getValueType(EltTy));
return Result;
}
static SDValue lowerMSASplatZExt(SDValue Op, unsigned OpNr, SelectionDAG &DAG) {
EVT ResVecTy = Op->getValueType(0);
EVT ViaVecTy = ResVecTy;
bool BigEndian = !DAG.getSubtarget().getTargetTriple().isLittleEndian();
SDLoc DL(Op);
// When ResVecTy == MVT::v2i64, LaneA is the upper 32 bits of the lane and
// LaneB is the lower 32-bits. Otherwise LaneA and LaneB are alternating
// lanes.
SDValue LaneA = Op->getOperand(OpNr);
SDValue LaneB;
if (ResVecTy == MVT::v2i64) {
// In case of the index being passed as an immediate value, set the upper
// lane to 0 so that the splati.d instruction can be matched.
if (isa<ConstantSDNode>(LaneA))
LaneB = DAG.getConstant(0, DL, MVT::i32);
// Having the index passed in a register, set the upper lane to the same
// value as the lower - this results in the BUILD_VECTOR node not being
// expanded through stack. This way we are able to pattern match the set of
// nodes created here to splat.d.
else
LaneB = LaneA;
ViaVecTy = MVT::v4i32;
if(BigEndian)
std::swap(LaneA, LaneB);
} else
LaneB = LaneA;
SDValue Ops[16] = { LaneA, LaneB, LaneA, LaneB, LaneA, LaneB, LaneA, LaneB,
LaneA, LaneB, LaneA, LaneB, LaneA, LaneB, LaneA, LaneB };
SDValue Result = DAG.getBuildVector(
ViaVecTy, DL, makeArrayRef(Ops, ViaVecTy.getVectorNumElements()));
if (ViaVecTy != ResVecTy) {
SDValue One = DAG.getConstant(1, DL, ViaVecTy);
Result = DAG.getNode(ISD::BITCAST, DL, ResVecTy,
DAG.getNode(ISD::AND, DL, ViaVecTy, Result, One));
}
return Result;
}
static SDValue lowerMSASplatImm(SDValue Op, unsigned ImmOp, SelectionDAG &DAG,
bool IsSigned = false) {
auto *CImm = cast<ConstantSDNode>(Op->getOperand(ImmOp));
return DAG.getConstant(
APInt(Op->getValueType(0).getScalarType().getSizeInBits(),
IsSigned ? CImm->getSExtValue() : CImm->getZExtValue(), IsSigned),
SDLoc(Op), Op->getValueType(0));
}
static SDValue getBuildVectorSplat(EVT VecTy, SDValue SplatValue,
bool BigEndian, SelectionDAG &DAG) {
EVT ViaVecTy = VecTy;
SDValue SplatValueA = SplatValue;
SDValue SplatValueB = SplatValue;
SDLoc DL(SplatValue);
if (VecTy == MVT::v2i64) {
// v2i64 BUILD_VECTOR must be performed via v4i32 so split into i32's.
ViaVecTy = MVT::v4i32;
SplatValueA = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, SplatValue);
SplatValueB = DAG.getNode(ISD::SRL, DL, MVT::i64, SplatValue,
DAG.getConstant(32, DL, MVT::i32));
SplatValueB = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, SplatValueB);
}
// We currently hold the parts in little endian order. Swap them if
// necessary.
if (BigEndian)
std::swap(SplatValueA, SplatValueB);
SDValue Ops[16] = { SplatValueA, SplatValueB, SplatValueA, SplatValueB,
SplatValueA, SplatValueB, SplatValueA, SplatValueB,
SplatValueA, SplatValueB, SplatValueA, SplatValueB,
SplatValueA, SplatValueB, SplatValueA, SplatValueB };
SDValue Result = DAG.getBuildVector(
ViaVecTy, DL, makeArrayRef(Ops, ViaVecTy.getVectorNumElements()));
if (VecTy != ViaVecTy)
Result = DAG.getNode(ISD::BITCAST, DL, VecTy, Result);
return Result;
}
static SDValue lowerMSABinaryBitImmIntr(SDValue Op, SelectionDAG &DAG,
unsigned Opc, SDValue Imm,
bool BigEndian) {
EVT VecTy = Op->getValueType(0);
SDValue Exp2Imm;
SDLoc DL(Op);
// The DAG Combiner can't constant fold bitcasted vectors yet so we must do it
// here for now.
if (VecTy == MVT::v2i64) {
if (ConstantSDNode *CImm = dyn_cast<ConstantSDNode>(Imm)) {
APInt BitImm = APInt(64, 1) << CImm->getAPIntValue();
SDValue BitImmHiOp = DAG.getConstant(BitImm.lshr(32).trunc(32), DL,
MVT::i32);
SDValue BitImmLoOp = DAG.getConstant(BitImm.trunc(32), DL, MVT::i32);
if (BigEndian)
std::swap(BitImmLoOp, BitImmHiOp);
Exp2Imm = DAG.getNode(
ISD::BITCAST, DL, MVT::v2i64,
DAG.getBuildVector(MVT::v4i32, DL,
{BitImmLoOp, BitImmHiOp, BitImmLoOp, BitImmHiOp}));
}
}
if (!Exp2Imm.getNode()) {
// We couldnt constant fold, do a vector shift instead
// Extend i32 to i64 if necessary. Sign or zero extend doesn't matter since
// only values 0-63 are valid.
if (VecTy == MVT::v2i64)
Imm = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i64, Imm);
Exp2Imm = getBuildVectorSplat(VecTy, Imm, BigEndian, DAG);
Exp2Imm = DAG.getNode(ISD::SHL, DL, VecTy, DAG.getConstant(1, DL, VecTy),
Exp2Imm);
}
return DAG.getNode(Opc, DL, VecTy, Op->getOperand(1), Exp2Imm);
}
static SDValue truncateVecElts(SDValue Op, SelectionDAG &DAG) {
SDLoc DL(Op);
EVT ResTy = Op->getValueType(0);
SDValue Vec = Op->getOperand(2);
bool BigEndian = !DAG.getSubtarget().getTargetTriple().isLittleEndian();
MVT ResEltTy = ResTy == MVT::v2i64 ? MVT::i64 : MVT::i32;
SDValue ConstValue = DAG.getConstant(Vec.getScalarValueSizeInBits() - 1,
DL, ResEltTy);
SDValue SplatVec = getBuildVectorSplat(ResTy, ConstValue, BigEndian, DAG);
return DAG.getNode(ISD::AND, DL, ResTy, Vec, SplatVec);
}
static SDValue lowerMSABitClear(SDValue Op, SelectionDAG &DAG) {
EVT ResTy = Op->getValueType(0);
SDLoc DL(Op);
SDValue One = DAG.getConstant(1, DL, ResTy);
SDValue Bit = DAG.getNode(ISD::SHL, DL, ResTy, One, truncateVecElts(Op, DAG));
return DAG.getNode(ISD::AND, DL, ResTy, Op->getOperand(1),
DAG.getNOT(DL, Bit, ResTy));
}
static SDValue lowerMSABitClearImm(SDValue Op, SelectionDAG &DAG) {
SDLoc DL(Op);
EVT ResTy = Op->getValueType(0);
APInt BitImm = APInt(ResTy.getScalarSizeInBits(), 1)
<< cast<ConstantSDNode>(Op->getOperand(2))->getAPIntValue();
SDValue BitMask = DAG.getConstant(~BitImm, DL, ResTy);
return DAG.getNode(ISD::AND, DL, ResTy, Op->getOperand(1), BitMask);
}
SDValue MipsSETargetLowering::lowerINTRINSIC_WO_CHAIN(SDValue Op,
SelectionDAG &DAG) const {
SDLoc DL(Op);
unsigned Intrinsic = cast<ConstantSDNode>(Op->getOperand(0))->getZExtValue();
switch (Intrinsic) {
default:
return SDValue();
case Intrinsic::mips_shilo:
return lowerDSPIntr(Op, DAG, MipsISD::SHILO);
case Intrinsic::mips_dpau_h_qbl:
return lowerDSPIntr(Op, DAG, MipsISD::DPAU_H_QBL);
case Intrinsic::mips_dpau_h_qbr:
return lowerDSPIntr(Op, DAG, MipsISD::DPAU_H_QBR);
case Intrinsic::mips_dpsu_h_qbl:
return lowerDSPIntr(Op, DAG, MipsISD::DPSU_H_QBL);
case Intrinsic::mips_dpsu_h_qbr:
return lowerDSPIntr(Op, DAG, MipsISD::DPSU_H_QBR);
case Intrinsic::mips_dpa_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::DPA_W_PH);
case Intrinsic::mips_dps_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::DPS_W_PH);
case Intrinsic::mips_dpax_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::DPAX_W_PH);
case Intrinsic::mips_dpsx_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::DPSX_W_PH);
case Intrinsic::mips_mulsa_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::MULSA_W_PH);
case Intrinsic::mips_mult:
return lowerDSPIntr(Op, DAG, MipsISD::Mult);
case Intrinsic::mips_multu:
return lowerDSPIntr(Op, DAG, MipsISD::Multu);
case Intrinsic::mips_madd:
return lowerDSPIntr(Op, DAG, MipsISD::MAdd);
case Intrinsic::mips_maddu:
return lowerDSPIntr(Op, DAG, MipsISD::MAddu);
case Intrinsic::mips_msub:
return lowerDSPIntr(Op, DAG, MipsISD::MSub);
case Intrinsic::mips_msubu:
return lowerDSPIntr(Op, DAG, MipsISD::MSubu);
case Intrinsic::mips_addv_b:
case Intrinsic::mips_addv_h:
case Intrinsic::mips_addv_w:
case Intrinsic::mips_addv_d:
return DAG.getNode(ISD::ADD, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_addvi_b:
case Intrinsic::mips_addvi_h:
case Intrinsic::mips_addvi_w:
case Intrinsic::mips_addvi_d:
return DAG.getNode(ISD::ADD, DL, Op->getValueType(0), Op->getOperand(1),
lowerMSASplatImm(Op, 2, DAG));
case Intrinsic::mips_and_v:
return DAG.getNode(ISD::AND, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_andi_b:
return DAG.getNode(ISD::AND, DL, Op->getValueType(0), Op->getOperand(1),
lowerMSASplatImm(Op, 2, DAG));
case Intrinsic::mips_bclr_b:
case Intrinsic::mips_bclr_h:
case Intrinsic::mips_bclr_w:
case Intrinsic::mips_bclr_d:
return lowerMSABitClear(Op, DAG);
case Intrinsic::mips_bclri_b:
case Intrinsic::mips_bclri_h:
case Intrinsic::mips_bclri_w:
case Intrinsic::mips_bclri_d:
return lowerMSABitClearImm(Op, DAG);
case Intrinsic::mips_binsli_b:
case Intrinsic::mips_binsli_h:
case Intrinsic::mips_binsli_w:
case Intrinsic::mips_binsli_d: {
// binsli_x(IfClear, IfSet, nbits) -> (vselect LBitsMask, IfSet, IfClear)
EVT VecTy = Op->getValueType(0);
EVT EltTy = VecTy.getVectorElementType();
if (Op->getConstantOperandVal(3) >= EltTy.getSizeInBits())
report_fatal_error("Immediate out of range");
APInt Mask = APInt::getHighBitsSet(EltTy.getSizeInBits(),
Op->getConstantOperandVal(3) + 1);
return DAG.getNode(ISD::VSELECT, DL, VecTy,
DAG.getConstant(Mask, DL, VecTy, true),
Op->getOperand(2), Op->getOperand(1));
}
case Intrinsic::mips_binsri_b:
case Intrinsic::mips_binsri_h:
case Intrinsic::mips_binsri_w:
case Intrinsic::mips_binsri_d: {
// binsri_x(IfClear, IfSet, nbits) -> (vselect RBitsMask, IfSet, IfClear)
EVT VecTy = Op->getValueType(0);
EVT EltTy = VecTy.getVectorElementType();
if (Op->getConstantOperandVal(3) >= EltTy.getSizeInBits())
report_fatal_error("Immediate out of range");
APInt Mask = APInt::getLowBitsSet(EltTy.getSizeInBits(),
Op->getConstantOperandVal(3) + 1);
return DAG.getNode(ISD::VSELECT, DL, VecTy,
DAG.getConstant(Mask, DL, VecTy, true),
Op->getOperand(2), Op->getOperand(1));
}
case Intrinsic::mips_bmnz_v:
return DAG.getNode(ISD::VSELECT, DL, Op->getValueType(0), Op->getOperand(3),
Op->getOperand(2), Op->getOperand(1));
case Intrinsic::mips_bmnzi_b:
return DAG.getNode(ISD::VSELECT, DL, Op->getValueType(0),
lowerMSASplatImm(Op, 3, DAG), Op->getOperand(2),
Op->getOperand(1));
case Intrinsic::mips_bmz_v:
return DAG.getNode(ISD::VSELECT, DL, Op->getValueType(0), Op->getOperand(3),
Op->getOperand(1), Op->getOperand(2));
case Intrinsic::mips_bmzi_b:
return DAG.getNode(ISD::VSELECT, DL, Op->getValueType(0),
lowerMSASplatImm(Op, 3, DAG), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_bneg_b:
case Intrinsic::mips_bneg_h:
case Intrinsic::mips_bneg_w:
case Intrinsic::mips_bneg_d: {
EVT VecTy = Op->getValueType(0);
SDValue One = DAG.getConstant(1, DL, VecTy);
return DAG.getNode(ISD::XOR, DL, VecTy, Op->getOperand(1),
DAG.getNode(ISD::SHL, DL, VecTy, One,
truncateVecElts(Op, DAG)));
}
case Intrinsic::mips_bnegi_b:
case Intrinsic::mips_bnegi_h:
case Intrinsic::mips_bnegi_w:
case Intrinsic::mips_bnegi_d:
return lowerMSABinaryBitImmIntr(Op, DAG, ISD::XOR, Op->getOperand(2),
!Subtarget.isLittle());
case Intrinsic::mips_bnz_b:
case Intrinsic::mips_bnz_h:
case Intrinsic::mips_bnz_w:
case Intrinsic::mips_bnz_d:
return DAG.getNode(MipsISD::VALL_NONZERO, DL, Op->getValueType(0),
Op->getOperand(1));
case Intrinsic::mips_bnz_v:
return DAG.getNode(MipsISD::VANY_NONZERO, DL, Op->getValueType(0),
Op->getOperand(1));
case Intrinsic::mips_bsel_v:
// bsel_v(Mask, IfClear, IfSet) -> (vselect Mask, IfSet, IfClear)
return DAG.getNode(ISD::VSELECT, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(3),
Op->getOperand(2));
case Intrinsic::mips_bseli_b:
// bseli_v(Mask, IfClear, IfSet) -> (vselect Mask, IfSet, IfClear)
return DAG.getNode(ISD::VSELECT, DL, Op->getValueType(0),
Op->getOperand(1), lowerMSASplatImm(Op, 3, DAG),
Op->getOperand(2));
case Intrinsic::mips_bset_b:
case Intrinsic::mips_bset_h:
case Intrinsic::mips_bset_w:
case Intrinsic::mips_bset_d: {
EVT VecTy = Op->getValueType(0);
SDValue One = DAG.getConstant(1, DL, VecTy);
return DAG.getNode(ISD::OR, DL, VecTy, Op->getOperand(1),
DAG.getNode(ISD::SHL, DL, VecTy, One,
truncateVecElts(Op, DAG)));
}
case Intrinsic::mips_bseti_b:
case Intrinsic::mips_bseti_h:
case Intrinsic::mips_bseti_w:
case Intrinsic::mips_bseti_d:
return lowerMSABinaryBitImmIntr(Op, DAG, ISD::OR, Op->getOperand(2),
!Subtarget.isLittle());
case Intrinsic::mips_bz_b:
case Intrinsic::mips_bz_h:
case Intrinsic::mips_bz_w:
case Intrinsic::mips_bz_d:
return DAG.getNode(MipsISD::VALL_ZERO, DL, Op->getValueType(0),
Op->getOperand(1));
case Intrinsic::mips_bz_v:
return DAG.getNode(MipsISD::VANY_ZERO, DL, Op->getValueType(0),
Op->getOperand(1));
case Intrinsic::mips_ceq_b:
case Intrinsic::mips_ceq_h:
case Intrinsic::mips_ceq_w:
case Intrinsic::mips_ceq_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETEQ);
case Intrinsic::mips_ceqi_b:
case Intrinsic::mips_ceqi_h:
case Intrinsic::mips_ceqi_w:
case Intrinsic::mips_ceqi_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
lowerMSASplatImm(Op, 2, DAG, true), ISD::SETEQ);
case Intrinsic::mips_cle_s_b:
case Intrinsic::mips_cle_s_h:
case Intrinsic::mips_cle_s_w:
case Intrinsic::mips_cle_s_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETLE);
case Intrinsic::mips_clei_s_b:
case Intrinsic::mips_clei_s_h:
case Intrinsic::mips_clei_s_w:
case Intrinsic::mips_clei_s_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
lowerMSASplatImm(Op, 2, DAG, true), ISD::SETLE);
case Intrinsic::mips_cle_u_b:
case Intrinsic::mips_cle_u_h:
case Intrinsic::mips_cle_u_w:
case Intrinsic::mips_cle_u_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETULE);
case Intrinsic::mips_clei_u_b:
case Intrinsic::mips_clei_u_h:
case Intrinsic::mips_clei_u_w:
case Intrinsic::mips_clei_u_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
lowerMSASplatImm(Op, 2, DAG), ISD::SETULE);
case Intrinsic::mips_clt_s_b:
case Intrinsic::mips_clt_s_h:
case Intrinsic::mips_clt_s_w:
case Intrinsic::mips_clt_s_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETLT);
case Intrinsic::mips_clti_s_b:
case Intrinsic::mips_clti_s_h:
case Intrinsic::mips_clti_s_w:
case Intrinsic::mips_clti_s_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
lowerMSASplatImm(Op, 2, DAG, true), ISD::SETLT);
case Intrinsic::mips_clt_u_b:
case Intrinsic::mips_clt_u_h:
case Intrinsic::mips_clt_u_w:
case Intrinsic::mips_clt_u_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETULT);
case Intrinsic::mips_clti_u_b:
case Intrinsic::mips_clti_u_h:
case Intrinsic::mips_clti_u_w:
case Intrinsic::mips_clti_u_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
lowerMSASplatImm(Op, 2, DAG), ISD::SETULT);
case Intrinsic::mips_copy_s_b:
case Intrinsic::mips_copy_s_h:
case Intrinsic::mips_copy_s_w:
return lowerMSACopyIntr(Op, DAG, MipsISD::VEXTRACT_SEXT_ELT);
case Intrinsic::mips_copy_s_d:
if (Subtarget.hasMips64())
// Lower directly into VEXTRACT_SEXT_ELT since i64 is legal on Mips64.
return lowerMSACopyIntr(Op, DAG, MipsISD::VEXTRACT_SEXT_ELT);
else {
// Lower into the generic EXTRACT_VECTOR_ELT node and let the type
// legalizer and EXTRACT_VECTOR_ELT lowering sort it out.
return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(Op),
Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
}
case Intrinsic::mips_copy_u_b:
case Intrinsic::mips_copy_u_h:
case Intrinsic::mips_copy_u_w:
return lowerMSACopyIntr(Op, DAG, MipsISD::VEXTRACT_ZEXT_ELT);
case Intrinsic::mips_copy_u_d:
if (Subtarget.hasMips64())
// Lower directly into VEXTRACT_ZEXT_ELT since i64 is legal on Mips64.
return lowerMSACopyIntr(Op, DAG, MipsISD::VEXTRACT_ZEXT_ELT);
else {
// Lower into the generic EXTRACT_VECTOR_ELT node and let the type
// legalizer and EXTRACT_VECTOR_ELT lowering sort it out.
// Note: When i64 is illegal, this results in copy_s.w instructions
// instead of copy_u.w instructions. This makes no difference to the
// behaviour since i64 is only illegal when the register file is 32-bit.
return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(Op),
Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
}
case Intrinsic::mips_div_s_b:
case Intrinsic::mips_div_s_h:
case Intrinsic::mips_div_s_w:
case Intrinsic::mips_div_s_d:
return DAG.getNode(ISD::SDIV, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_div_u_b:
case Intrinsic::mips_div_u_h:
case Intrinsic::mips_div_u_w:
case Intrinsic::mips_div_u_d:
return DAG.getNode(ISD::UDIV, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_fadd_w:
case Intrinsic::mips_fadd_d:
// TODO: If intrinsics have fast-math-flags, propagate them.
return DAG.getNode(ISD::FADD, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
// Don't lower mips_fcaf_[wd] since LLVM folds SETFALSE condcodes away
case Intrinsic::mips_fceq_w:
case Intrinsic::mips_fceq_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETOEQ);
case Intrinsic::mips_fcle_w:
case Intrinsic::mips_fcle_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETOLE);
case Intrinsic::mips_fclt_w:
case Intrinsic::mips_fclt_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETOLT);
case Intrinsic::mips_fcne_w:
case Intrinsic::mips_fcne_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETONE);
case Intrinsic::mips_fcor_w:
case Intrinsic::mips_fcor_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETO);
case Intrinsic::mips_fcueq_w:
case Intrinsic::mips_fcueq_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETUEQ);
case Intrinsic::mips_fcule_w:
case Intrinsic::mips_fcule_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETULE);
case Intrinsic::mips_fcult_w:
case Intrinsic::mips_fcult_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETULT);
case Intrinsic::mips_fcun_w:
case Intrinsic::mips_fcun_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETUO);
case Intrinsic::mips_fcune_w:
case Intrinsic::mips_fcune_d:
return DAG.getSetCC(DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2), ISD::SETUNE);
case Intrinsic::mips_fdiv_w:
case Intrinsic::mips_fdiv_d:
// TODO: If intrinsics have fast-math-flags, propagate them.
return DAG.getNode(ISD::FDIV, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_ffint_u_w:
case Intrinsic::mips_ffint_u_d:
return DAG.getNode(ISD::UINT_TO_FP, DL, Op->getValueType(0),
Op->getOperand(1));
case Intrinsic::mips_ffint_s_w:
case Intrinsic::mips_ffint_s_d:
return DAG.getNode(ISD::SINT_TO_FP, DL, Op->getValueType(0),
Op->getOperand(1));
case Intrinsic::mips_fill_b:
case Intrinsic::mips_fill_h:
case Intrinsic::mips_fill_w:
case Intrinsic::mips_fill_d: {
EVT ResTy = Op->getValueType(0);
SmallVector<SDValue, 16> Ops(ResTy.getVectorNumElements(),
Op->getOperand(1));
// If ResTy is v2i64 then the type legalizer will break this node down into
// an equivalent v4i32.
return DAG.getBuildVector(ResTy, DL, Ops);
}
case Intrinsic::mips_fexp2_w:
case Intrinsic::mips_fexp2_d: {
// TODO: If intrinsics have fast-math-flags, propagate them.
EVT ResTy = Op->getValueType(0);
return DAG.getNode(
ISD::FMUL, SDLoc(Op), ResTy, Op->getOperand(1),
DAG.getNode(ISD::FEXP2, SDLoc(Op), ResTy, Op->getOperand(2)));
}
case Intrinsic::mips_flog2_w:
case Intrinsic::mips_flog2_d:
return DAG.getNode(ISD::FLOG2, DL, Op->getValueType(0), Op->getOperand(1));
case Intrinsic::mips_fmadd_w:
case Intrinsic::mips_fmadd_d:
return DAG.getNode(ISD::FMA, SDLoc(Op), Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2), Op->getOperand(3));
case Intrinsic::mips_fmul_w:
case Intrinsic::mips_fmul_d:
// TODO: If intrinsics have fast-math-flags, propagate them.
return DAG.getNode(ISD::FMUL, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_fmsub_w:
case Intrinsic::mips_fmsub_d: {
// TODO: If intrinsics have fast-math-flags, propagate them.
return DAG.getNode(MipsISD::FMS, SDLoc(Op), Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2), Op->getOperand(3));
}
case Intrinsic::mips_frint_w:
case Intrinsic::mips_frint_d:
return DAG.getNode(ISD::FRINT, DL, Op->getValueType(0), Op->getOperand(1));
case Intrinsic::mips_fsqrt_w:
case Intrinsic::mips_fsqrt_d:
return DAG.getNode(ISD::FSQRT, DL, Op->getValueType(0), Op->getOperand(1));
case Intrinsic::mips_fsub_w:
case Intrinsic::mips_fsub_d:
// TODO: If intrinsics have fast-math-flags, propagate them.
return DAG.getNode(ISD::FSUB, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_ftrunc_u_w:
case Intrinsic::mips_ftrunc_u_d:
return DAG.getNode(ISD::FP_TO_UINT, DL, Op->getValueType(0),
Op->getOperand(1));
case Intrinsic::mips_ftrunc_s_w:
case Intrinsic::mips_ftrunc_s_d:
return DAG.getNode(ISD::FP_TO_SINT, DL, Op->getValueType(0),
Op->getOperand(1));
case Intrinsic::mips_ilvev_b:
case Intrinsic::mips_ilvev_h:
case Intrinsic::mips_ilvev_w:
case Intrinsic::mips_ilvev_d:
return DAG.getNode(MipsISD::ILVEV, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2));
case Intrinsic::mips_ilvl_b:
case Intrinsic::mips_ilvl_h:
case Intrinsic::mips_ilvl_w:
case Intrinsic::mips_ilvl_d:
return DAG.getNode(MipsISD::ILVL, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2));
case Intrinsic::mips_ilvod_b:
case Intrinsic::mips_ilvod_h:
case Intrinsic::mips_ilvod_w:
case Intrinsic::mips_ilvod_d:
return DAG.getNode(MipsISD::ILVOD, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2));
case Intrinsic::mips_ilvr_b:
case Intrinsic::mips_ilvr_h:
case Intrinsic::mips_ilvr_w:
case Intrinsic::mips_ilvr_d:
return DAG.getNode(MipsISD::ILVR, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2));
case Intrinsic::mips_insert_b:
case Intrinsic::mips_insert_h:
case Intrinsic::mips_insert_w:
case Intrinsic::mips_insert_d:
return DAG.getNode(ISD::INSERT_VECTOR_ELT, SDLoc(Op), Op->getValueType(0),
Op->getOperand(1), Op->getOperand(3), Op->getOperand(2));
case Intrinsic::mips_insve_b:
case Intrinsic::mips_insve_h:
case Intrinsic::mips_insve_w:
case Intrinsic::mips_insve_d: {
// Report an error for out of range values.
int64_t Max;
switch (Intrinsic) {
case Intrinsic::mips_insve_b: Max = 15; break;
case Intrinsic::mips_insve_h: Max = 7; break;
case Intrinsic::mips_insve_w: Max = 3; break;
case Intrinsic::mips_insve_d: Max = 1; break;
default: llvm_unreachable("Unmatched intrinsic");
}
int64_t Value = cast<ConstantSDNode>(Op->getOperand(2))->getSExtValue();
if (Value < 0 || Value > Max)
report_fatal_error("Immediate out of range");
return DAG.getNode(MipsISD::INSVE, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2), Op->getOperand(3),
DAG.getConstant(0, DL, MVT::i32));
}
case Intrinsic::mips_ldi_b:
case Intrinsic::mips_ldi_h:
case Intrinsic::mips_ldi_w:
case Intrinsic::mips_ldi_d:
return lowerMSASplatImm(Op, 1, DAG, true);
case Intrinsic::mips_lsa:
case Intrinsic::mips_dlsa: {
EVT ResTy = Op->getValueType(0);
return DAG.getNode(ISD::ADD, SDLoc(Op), ResTy, Op->getOperand(1),
DAG.getNode(ISD::SHL, SDLoc(Op), ResTy,
Op->getOperand(2), Op->getOperand(3)));
}
case Intrinsic::mips_maddv_b:
case Intrinsic::mips_maddv_h:
case Intrinsic::mips_maddv_w:
case Intrinsic::mips_maddv_d: {
EVT ResTy = Op->getValueType(0);
return DAG.getNode(ISD::ADD, SDLoc(Op), ResTy, Op->getOperand(1),
DAG.getNode(ISD::MUL, SDLoc(Op), ResTy,
Op->getOperand(2), Op->getOperand(3)));
}
case Intrinsic::mips_max_s_b:
case Intrinsic::mips_max_s_h:
case Intrinsic::mips_max_s_w:
case Intrinsic::mips_max_s_d:
return DAG.getNode(ISD::SMAX, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2));
case Intrinsic::mips_max_u_b:
case Intrinsic::mips_max_u_h:
case Intrinsic::mips_max_u_w:
case Intrinsic::mips_max_u_d:
return DAG.getNode(ISD::UMAX, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2));
case Intrinsic::mips_maxi_s_b:
case Intrinsic::mips_maxi_s_h:
case Intrinsic::mips_maxi_s_w:
case Intrinsic::mips_maxi_s_d:
return DAG.getNode(ISD::SMAX, DL, Op->getValueType(0),
Op->getOperand(1), lowerMSASplatImm(Op, 2, DAG, true));
case Intrinsic::mips_maxi_u_b:
case Intrinsic::mips_maxi_u_h:
case Intrinsic::mips_maxi_u_w:
case Intrinsic::mips_maxi_u_d:
return DAG.getNode(ISD::UMAX, DL, Op->getValueType(0),
Op->getOperand(1), lowerMSASplatImm(Op, 2, DAG));
case Intrinsic::mips_min_s_b:
case Intrinsic::mips_min_s_h:
case Intrinsic::mips_min_s_w:
case Intrinsic::mips_min_s_d:
return DAG.getNode(ISD::SMIN, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2));
case Intrinsic::mips_min_u_b:
case Intrinsic::mips_min_u_h:
case Intrinsic::mips_min_u_w:
case Intrinsic::mips_min_u_d:
return DAG.getNode(ISD::UMIN, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2));
case Intrinsic::mips_mini_s_b:
case Intrinsic::mips_mini_s_h:
case Intrinsic::mips_mini_s_w:
case Intrinsic::mips_mini_s_d:
return DAG.getNode(ISD::SMIN, DL, Op->getValueType(0),
Op->getOperand(1), lowerMSASplatImm(Op, 2, DAG, true));
case Intrinsic::mips_mini_u_b:
case Intrinsic::mips_mini_u_h:
case Intrinsic::mips_mini_u_w:
case Intrinsic::mips_mini_u_d:
return DAG.getNode(ISD::UMIN, DL, Op->getValueType(0),
Op->getOperand(1), lowerMSASplatImm(Op, 2, DAG));
case Intrinsic::mips_mod_s_b:
case Intrinsic::mips_mod_s_h:
case Intrinsic::mips_mod_s_w:
case Intrinsic::mips_mod_s_d:
return DAG.getNode(ISD::SREM, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_mod_u_b:
case Intrinsic::mips_mod_u_h:
case Intrinsic::mips_mod_u_w:
case Intrinsic::mips_mod_u_d:
return DAG.getNode(ISD::UREM, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_mulv_b:
case Intrinsic::mips_mulv_h:
case Intrinsic::mips_mulv_w:
case Intrinsic::mips_mulv_d:
return DAG.getNode(ISD::MUL, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_msubv_b:
case Intrinsic::mips_msubv_h:
case Intrinsic::mips_msubv_w:
case Intrinsic::mips_msubv_d: {
EVT ResTy = Op->getValueType(0);
return DAG.getNode(ISD::SUB, SDLoc(Op), ResTy, Op->getOperand(1),
DAG.getNode(ISD::MUL, SDLoc(Op), ResTy,
Op->getOperand(2), Op->getOperand(3)));
}
case Intrinsic::mips_nlzc_b:
case Intrinsic::mips_nlzc_h:
case Intrinsic::mips_nlzc_w:
case Intrinsic::mips_nlzc_d:
return DAG.getNode(ISD::CTLZ, DL, Op->getValueType(0), Op->getOperand(1));
case Intrinsic::mips_nor_v: {
SDValue Res = DAG.getNode(ISD::OR, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2));
return DAG.getNOT(DL, Res, Res->getValueType(0));
}
case Intrinsic::mips_nori_b: {
SDValue Res = DAG.getNode(ISD::OR, DL, Op->getValueType(0),
Op->getOperand(1),
lowerMSASplatImm(Op, 2, DAG));
return DAG.getNOT(DL, Res, Res->getValueType(0));
}
case Intrinsic::mips_or_v:
return DAG.getNode(ISD::OR, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_ori_b:
return DAG.getNode(ISD::OR, DL, Op->getValueType(0),
Op->getOperand(1), lowerMSASplatImm(Op, 2, DAG));
case Intrinsic::mips_pckev_b:
case Intrinsic::mips_pckev_h:
case Intrinsic::mips_pckev_w:
case Intrinsic::mips_pckev_d:
return DAG.getNode(MipsISD::PCKEV, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2));
case Intrinsic::mips_pckod_b:
case Intrinsic::mips_pckod_h:
case Intrinsic::mips_pckod_w:
case Intrinsic::mips_pckod_d:
return DAG.getNode(MipsISD::PCKOD, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2));
case Intrinsic::mips_pcnt_b:
case Intrinsic::mips_pcnt_h:
case Intrinsic::mips_pcnt_w:
case Intrinsic::mips_pcnt_d:
return DAG.getNode(ISD::CTPOP, DL, Op->getValueType(0), Op->getOperand(1));
case Intrinsic::mips_sat_s_b:
case Intrinsic::mips_sat_s_h:
case Intrinsic::mips_sat_s_w:
case Intrinsic::mips_sat_s_d:
case Intrinsic::mips_sat_u_b:
case Intrinsic::mips_sat_u_h:
case Intrinsic::mips_sat_u_w:
case Intrinsic::mips_sat_u_d: {
// Report an error for out of range values.
int64_t Max;
switch (Intrinsic) {
case Intrinsic::mips_sat_s_b:
case Intrinsic::mips_sat_u_b: Max = 7; break;
case Intrinsic::mips_sat_s_h:
case Intrinsic::mips_sat_u_h: Max = 15; break;
case Intrinsic::mips_sat_s_w:
case Intrinsic::mips_sat_u_w: Max = 31; break;
case Intrinsic::mips_sat_s_d:
case Intrinsic::mips_sat_u_d: Max = 63; break;
default: llvm_unreachable("Unmatched intrinsic");
}
int64_t Value = cast<ConstantSDNode>(Op->getOperand(2))->getSExtValue();
if (Value < 0 || Value > Max)
report_fatal_error("Immediate out of range");
return SDValue();
}
case Intrinsic::mips_shf_b:
case Intrinsic::mips_shf_h:
case Intrinsic::mips_shf_w: {
int64_t Value = cast<ConstantSDNode>(Op->getOperand(2))->getSExtValue();
if (Value < 0 || Value > 255)
report_fatal_error("Immediate out of range");
return DAG.getNode(MipsISD::SHF, DL, Op->getValueType(0),
Op->getOperand(2), Op->getOperand(1));
}
case Intrinsic::mips_sldi_b:
case Intrinsic::mips_sldi_h:
case Intrinsic::mips_sldi_w:
case Intrinsic::mips_sldi_d: {
// Report an error for out of range values.
int64_t Max;
switch (Intrinsic) {
case Intrinsic::mips_sldi_b: Max = 15; break;
case Intrinsic::mips_sldi_h: Max = 7; break;
case Intrinsic::mips_sldi_w: Max = 3; break;
case Intrinsic::mips_sldi_d: Max = 1; break;
default: llvm_unreachable("Unmatched intrinsic");
}
int64_t Value = cast<ConstantSDNode>(Op->getOperand(3))->getSExtValue();
if (Value < 0 || Value > Max)
report_fatal_error("Immediate out of range");
return SDValue();
}
case Intrinsic::mips_sll_b:
case Intrinsic::mips_sll_h:
case Intrinsic::mips_sll_w:
case Intrinsic::mips_sll_d:
return DAG.getNode(ISD::SHL, DL, Op->getValueType(0), Op->getOperand(1),
truncateVecElts(Op, DAG));
case Intrinsic::mips_slli_b:
case Intrinsic::mips_slli_h:
case Intrinsic::mips_slli_w:
case Intrinsic::mips_slli_d:
return DAG.getNode(ISD::SHL, DL, Op->getValueType(0),
Op->getOperand(1), lowerMSASplatImm(Op, 2, DAG));
case Intrinsic::mips_splat_b:
case Intrinsic::mips_splat_h:
case Intrinsic::mips_splat_w:
case Intrinsic::mips_splat_d:
// We can't lower via VECTOR_SHUFFLE because it requires constant shuffle
// masks, nor can we lower via BUILD_VECTOR & EXTRACT_VECTOR_ELT because
// EXTRACT_VECTOR_ELT can't extract i64's on MIPS32.
// Instead we lower to MipsISD::VSHF and match from there.
return DAG.getNode(MipsISD::VSHF, DL, Op->getValueType(0),
lowerMSASplatZExt(Op, 2, DAG), Op->getOperand(1),
Op->getOperand(1));
case Intrinsic::mips_splati_b:
case Intrinsic::mips_splati_h:
case Intrinsic::mips_splati_w:
case Intrinsic::mips_splati_d:
return DAG.getNode(MipsISD::VSHF, DL, Op->getValueType(0),
lowerMSASplatImm(Op, 2, DAG), Op->getOperand(1),
Op->getOperand(1));
case Intrinsic::mips_sra_b:
case Intrinsic::mips_sra_h:
case Intrinsic::mips_sra_w:
case Intrinsic::mips_sra_d:
return DAG.getNode(ISD::SRA, DL, Op->getValueType(0), Op->getOperand(1),
truncateVecElts(Op, DAG));
case Intrinsic::mips_srai_b:
case Intrinsic::mips_srai_h:
case Intrinsic::mips_srai_w:
case Intrinsic::mips_srai_d:
return DAG.getNode(ISD::SRA, DL, Op->getValueType(0),
Op->getOperand(1), lowerMSASplatImm(Op, 2, DAG));
case Intrinsic::mips_srari_b:
case Intrinsic::mips_srari_h:
case Intrinsic::mips_srari_w:
case Intrinsic::mips_srari_d: {
// Report an error for out of range values.
int64_t Max;
switch (Intrinsic) {
case Intrinsic::mips_srari_b: Max = 7; break;
case Intrinsic::mips_srari_h: Max = 15; break;
case Intrinsic::mips_srari_w: Max = 31; break;
case Intrinsic::mips_srari_d: Max = 63; break;
default: llvm_unreachable("Unmatched intrinsic");
}
int64_t Value = cast<ConstantSDNode>(Op->getOperand(2))->getSExtValue();
if (Value < 0 || Value > Max)
report_fatal_error("Immediate out of range");
return SDValue();
}
case Intrinsic::mips_srl_b:
case Intrinsic::mips_srl_h:
case Intrinsic::mips_srl_w:
case Intrinsic::mips_srl_d:
return DAG.getNode(ISD::SRL, DL, Op->getValueType(0), Op->getOperand(1),
truncateVecElts(Op, DAG));
case Intrinsic::mips_srli_b:
case Intrinsic::mips_srli_h:
case Intrinsic::mips_srli_w:
case Intrinsic::mips_srli_d:
return DAG.getNode(ISD::SRL, DL, Op->getValueType(0),
Op->getOperand(1), lowerMSASplatImm(Op, 2, DAG));
case Intrinsic::mips_srlri_b:
case Intrinsic::mips_srlri_h:
case Intrinsic::mips_srlri_w:
case Intrinsic::mips_srlri_d: {
// Report an error for out of range values.
int64_t Max;
switch (Intrinsic) {
case Intrinsic::mips_srlri_b: Max = 7; break;
case Intrinsic::mips_srlri_h: Max = 15; break;
case Intrinsic::mips_srlri_w: Max = 31; break;
case Intrinsic::mips_srlri_d: Max = 63; break;
default: llvm_unreachable("Unmatched intrinsic");
}
int64_t Value = cast<ConstantSDNode>(Op->getOperand(2))->getSExtValue();
if (Value < 0 || Value > Max)
report_fatal_error("Immediate out of range");
return SDValue();
}
case Intrinsic::mips_subv_b:
case Intrinsic::mips_subv_h:
case Intrinsic::mips_subv_w:
case Intrinsic::mips_subv_d:
return DAG.getNode(ISD::SUB, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_subvi_b:
case Intrinsic::mips_subvi_h:
case Intrinsic::mips_subvi_w:
case Intrinsic::mips_subvi_d:
return DAG.getNode(ISD::SUB, DL, Op->getValueType(0),
Op->getOperand(1), lowerMSASplatImm(Op, 2, DAG));
case Intrinsic::mips_vshf_b:
case Intrinsic::mips_vshf_h:
case Intrinsic::mips_vshf_w:
case Intrinsic::mips_vshf_d:
return DAG.getNode(MipsISD::VSHF, DL, Op->getValueType(0),
Op->getOperand(1), Op->getOperand(2), Op->getOperand(3));
case Intrinsic::mips_xor_v:
return DAG.getNode(ISD::XOR, DL, Op->getValueType(0), Op->getOperand(1),
Op->getOperand(2));
case Intrinsic::mips_xori_b:
return DAG.getNode(ISD::XOR, DL, Op->getValueType(0),
Op->getOperand(1), lowerMSASplatImm(Op, 2, DAG));
case Intrinsic::thread_pointer: {
EVT PtrVT = getPointerTy(DAG.getDataLayout());
return DAG.getNode(MipsISD::ThreadPointer, DL, PtrVT);
}
}
}
static SDValue lowerMSALoadIntr(SDValue Op, SelectionDAG &DAG, unsigned Intr,
const MipsSubtarget &Subtarget) {
SDLoc DL(Op);
SDValue ChainIn = Op->getOperand(0);
SDValue Address = Op->getOperand(2);
SDValue Offset = Op->getOperand(3);
EVT ResTy = Op->getValueType(0);
EVT PtrTy = Address->getValueType(0);
// For N64 addresses have the underlying type MVT::i64. This intrinsic
// however takes an i32 signed constant offset. The actual type of the
// intrinsic is a scaled signed i10.
if (Subtarget.isABI_N64())
Offset = DAG.getNode(ISD::SIGN_EXTEND, DL, PtrTy, Offset);
Address = DAG.getNode(ISD::ADD, DL, PtrTy, Address, Offset);
return DAG.getLoad(ResTy, DL, ChainIn, Address, MachinePointerInfo(),
Align(16));
}
SDValue MipsSETargetLowering::lowerINTRINSIC_W_CHAIN(SDValue Op,
SelectionDAG &DAG) const {
unsigned Intr = cast<ConstantSDNode>(Op->getOperand(1))->getZExtValue();
switch (Intr) {
default:
return SDValue();
case Intrinsic::mips_extp:
return lowerDSPIntr(Op, DAG, MipsISD::EXTP);
case Intrinsic::mips_extpdp:
return lowerDSPIntr(Op, DAG, MipsISD::EXTPDP);
case Intrinsic::mips_extr_w:
return lowerDSPIntr(Op, DAG, MipsISD::EXTR_W);
case Intrinsic::mips_extr_r_w:
return lowerDSPIntr(Op, DAG, MipsISD::EXTR_R_W);
case Intrinsic::mips_extr_rs_w:
return lowerDSPIntr(Op, DAG, MipsISD::EXTR_RS_W);
case Intrinsic::mips_extr_s_h:
return lowerDSPIntr(Op, DAG, MipsISD::EXTR_S_H);
case Intrinsic::mips_mthlip:
return lowerDSPIntr(Op, DAG, MipsISD::MTHLIP);
case Intrinsic::mips_mulsaq_s_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::MULSAQ_S_W_PH);
case Intrinsic::mips_maq_s_w_phl:
return lowerDSPIntr(Op, DAG, MipsISD::MAQ_S_W_PHL);
case Intrinsic::mips_maq_s_w_phr:
return lowerDSPIntr(Op, DAG, MipsISD::MAQ_S_W_PHR);
case Intrinsic::mips_maq_sa_w_phl:
return lowerDSPIntr(Op, DAG, MipsISD::MAQ_SA_W_PHL);
case Intrinsic::mips_maq_sa_w_phr:
return lowerDSPIntr(Op, DAG, MipsISD::MAQ_SA_W_PHR);
case Intrinsic::mips_dpaq_s_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::DPAQ_S_W_PH);
case Intrinsic::mips_dpsq_s_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::DPSQ_S_W_PH);
case Intrinsic::mips_dpaq_sa_l_w:
return lowerDSPIntr(Op, DAG, MipsISD::DPAQ_SA_L_W);
case Intrinsic::mips_dpsq_sa_l_w:
return lowerDSPIntr(Op, DAG, MipsISD::DPSQ_SA_L_W);
case Intrinsic::mips_dpaqx_s_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::DPAQX_S_W_PH);
case Intrinsic::mips_dpaqx_sa_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::DPAQX_SA_W_PH);
case Intrinsic::mips_dpsqx_s_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::DPSQX_S_W_PH);
case Intrinsic::mips_dpsqx_sa_w_ph:
return lowerDSPIntr(Op, DAG, MipsISD::DPSQX_SA_W_PH);
case Intrinsic::mips_ld_b:
case Intrinsic::mips_ld_h:
case Intrinsic::mips_ld_w:
case Intrinsic::mips_ld_d:
return lowerMSALoadIntr(Op, DAG, Intr, Subtarget);
}
}
static SDValue lowerMSAStoreIntr(SDValue Op, SelectionDAG &DAG, unsigned Intr,
const MipsSubtarget &Subtarget) {
SDLoc DL(Op);
SDValue ChainIn = Op->getOperand(0);
SDValue Value = Op->getOperand(2);
SDValue Address = Op->getOperand(3);
SDValue Offset = Op->getOperand(4);
EVT PtrTy = Address->getValueType(0);
// For N64 addresses have the underlying type MVT::i64. This intrinsic
// however takes an i32 signed constant offset. The actual type of the
// intrinsic is a scaled signed i10.
if (Subtarget.isABI_N64())
Offset = DAG.getNode(ISD::SIGN_EXTEND, DL, PtrTy, Offset);
Address = DAG.getNode(ISD::ADD, DL, PtrTy, Address, Offset);
return DAG.getStore(ChainIn, DL, Value, Address, MachinePointerInfo(),
Align(16));
}
SDValue MipsSETargetLowering::lowerINTRINSIC_VOID(SDValue Op,
SelectionDAG &DAG) const {
unsigned Intr = cast<ConstantSDNode>(Op->getOperand(1))->getZExtValue();
switch (Intr) {
default:
return SDValue();
case Intrinsic::mips_st_b:
case Intrinsic::mips_st_h:
case Intrinsic::mips_st_w:
case Intrinsic::mips_st_d:
return lowerMSAStoreIntr(Op, DAG, Intr, Subtarget);
}
}
// Lower ISD::EXTRACT_VECTOR_ELT into MipsISD::VEXTRACT_SEXT_ELT.
//
// The non-value bits resulting from ISD::EXTRACT_VECTOR_ELT are undefined. We
// choose to sign-extend but we could have equally chosen zero-extend. The
// DAGCombiner will fold any sign/zero extension of the ISD::EXTRACT_VECTOR_ELT
// result into this node later (possibly changing it to a zero-extend in the
// process).
SDValue MipsSETargetLowering::
lowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
SDLoc DL(Op);
EVT ResTy = Op->getValueType(0);
SDValue Op0 = Op->getOperand(0);
EVT VecTy = Op0->getValueType(0);
if (!VecTy.is128BitVector())
return SDValue();
if (ResTy.isInteger()) {
SDValue Op1 = Op->getOperand(1);
EVT EltTy = VecTy.getVectorElementType();
return DAG.getNode(MipsISD::VEXTRACT_SEXT_ELT, DL, ResTy, Op0, Op1,
DAG.getValueType(EltTy));
}
return Op;
}
static bool isConstantOrUndef(const SDValue Op) {
if (Op->isUndef())
return true;
if (isa<ConstantSDNode>(Op))
return true;
if (isa<ConstantFPSDNode>(Op))
return true;
return false;
}
static bool isConstantOrUndefBUILD_VECTOR(const BuildVectorSDNode *Op) {
for (unsigned i = 0; i < Op->getNumOperands(); ++i)
if (isConstantOrUndef(Op->getOperand(i)))
return true;
return false;
}
// Lowers ISD::BUILD_VECTOR into appropriate SelectionDAG nodes for the
// backend.
//
// Lowers according to the following rules:
// - Constant splats are legal as-is as long as the SplatBitSize is a power of
// 2 less than or equal to 64 and the value fits into a signed 10-bit
// immediate
// - Constant splats are lowered to bitconverted BUILD_VECTORs if SplatBitSize
// is a power of 2 less than or equal to 64 and the value does not fit into a
// signed 10-bit immediate
// - Non-constant splats are legal as-is.
// - Non-constant non-splats are lowered to sequences of INSERT_VECTOR_ELT.
// - All others are illegal and must be expanded.
SDValue MipsSETargetLowering::lowerBUILD_VECTOR(SDValue Op,
SelectionDAG &DAG) const {
BuildVectorSDNode *Node = cast<BuildVectorSDNode>(Op);
EVT ResTy = Op->getValueType(0);
SDLoc DL(Op);
APInt SplatValue, SplatUndef;
unsigned SplatBitSize;
bool HasAnyUndefs;
if (!Subtarget.hasMSA() || !ResTy.is128BitVector())
return SDValue();
if (Node->isConstantSplat(SplatValue, SplatUndef, SplatBitSize,
HasAnyUndefs, 8,
!Subtarget.isLittle()) && SplatBitSize <= 64) {
// We can only cope with 8, 16, 32, or 64-bit elements
if (SplatBitSize != 8 && SplatBitSize != 16 && SplatBitSize != 32 &&
SplatBitSize != 64)
return SDValue();
// If the value isn't an integer type we will have to bitcast
// from an integer type first. Also, if there are any undefs, we must
// lower them to defined values first.
if (ResTy.isInteger() && !HasAnyUndefs)
return Op;
EVT ViaVecTy;
switch (SplatBitSize) {
default:
return SDValue();
case 8:
ViaVecTy = MVT::v16i8;
break;
case 16:
ViaVecTy = MVT::v8i16;
break;
case 32:
ViaVecTy = MVT::v4i32;
break;
case 64:
// There's no fill.d to fall back on for 64-bit values
return SDValue();
}
// SelectionDAG::getConstant will promote SplatValue appropriately.
SDValue Result = DAG.getConstant(SplatValue, DL, ViaVecTy);
// Bitcast to the type we originally wanted
if (ViaVecTy != ResTy)
Result = DAG.getNode(ISD::BITCAST, SDLoc(Node), ResTy, Result);
return Result;
} else if (DAG.isSplatValue(Op, /* AllowUndefs */ false))
return Op;
else if (!isConstantOrUndefBUILD_VECTOR(Node)) {
// Use INSERT_VECTOR_ELT operations rather than expand to stores.
// The resulting code is the same length as the expansion, but it doesn't
// use memory operations
EVT ResTy = Node->getValueType(0);
assert(ResTy.isVector());
unsigned NumElts = ResTy.getVectorNumElements();
SDValue Vector = DAG.getUNDEF(ResTy);
for (unsigned i = 0; i < NumElts; ++i) {
Vector = DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, ResTy, Vector,
Node->getOperand(i),
DAG.getConstant(i, DL, MVT::i32));
}
return Vector;
}
return SDValue();
}
// Lower VECTOR_SHUFFLE into SHF (if possible).
//
// SHF splits the vector into blocks of four elements, then shuffles these
// elements according to a <4 x i2> constant (encoded as an integer immediate).
//
// It is therefore possible to lower into SHF when the mask takes the form:
// <a, b, c, d, a+4, b+4, c+4, d+4, a+8, b+8, c+8, d+8, ...>
// When undef's appear they are treated as if they were whatever value is
// necessary in order to fit the above forms.
//
// For example:
// %2 = shufflevector <8 x i16> %0, <8 x i16> undef,
// <8 x i32> <i32 3, i32 2, i32 1, i32 0,
// i32 7, i32 6, i32 5, i32 4>
// is lowered to:
// (SHF_H $w0, $w1, 27)
// where the 27 comes from:
// 3 + (2 << 2) + (1 << 4) + (0 << 6)
static SDValue lowerVECTOR_SHUFFLE_SHF(SDValue Op, EVT ResTy,
SmallVector<int, 16> Indices,
SelectionDAG &DAG) {
int SHFIndices[4] = { -1, -1, -1, -1 };
if (Indices.size() < 4)
return SDValue();
for (unsigned i = 0; i < 4; ++i) {
for (unsigned j = i; j < Indices.size(); j += 4) {
int Idx = Indices[j];
// Convert from vector index to 4-element subvector index
// If an index refers to an element outside of the subvector then give up
if (Idx != -1) {
Idx -= 4 * (j / 4);
if (Idx < 0 || Idx >= 4)
return SDValue();
}
// If the mask has an undef, replace it with the current index.
// Note that it might still be undef if the current index is also undef
if (SHFIndices[i] == -1)
SHFIndices[i] = Idx;
// Check that non-undef values are the same as in the mask. If they
// aren't then give up
if (!(Idx == -1 || Idx == SHFIndices[i]))
return SDValue();
}
}
// Calculate the immediate. Replace any remaining undefs with zero
APInt Imm(32, 0);
for (int i = 3; i >= 0; --i) {
int Idx = SHFIndices[i];
if (Idx == -1)
Idx = 0;
Imm <<= 2;
Imm |= Idx & 0x3;
}
SDLoc DL(Op);
return DAG.getNode(MipsISD::SHF, DL, ResTy,
DAG.getTargetConstant(Imm, DL, MVT::i32),
Op->getOperand(0));
}
/// Determine whether a range fits a regular pattern of values.
/// This function accounts for the possibility of jumping over the End iterator.
template <typename ValType>
static bool
fitsRegularPattern(typename SmallVectorImpl<ValType>::const_iterator Begin,
unsigned CheckStride,
typename SmallVectorImpl<ValType>::const_iterator End,
ValType ExpectedIndex, unsigned ExpectedIndexStride) {
auto &I = Begin;
while (I != End) {
if (*I != -1 && *I != ExpectedIndex)
return false;
ExpectedIndex += ExpectedIndexStride;
// Incrementing past End is undefined behaviour so we must increment one
// step at a time and check for End at each step.
for (unsigned n = 0; n < CheckStride && I != End; ++n, ++I)
; // Empty loop body.
}
return true;
}
// Determine whether VECTOR_SHUFFLE is a SPLATI.
//
// It is a SPLATI when the mask is:
// <x, x, x, ...>
// where x is any valid index.
//
// When undef's appear in the mask they are treated as if they were whatever
// value is necessary in order to fit the above form.
static bool isVECTOR_SHUFFLE_SPLATI(SDValue Op, EVT ResTy,
SmallVector<int, 16> Indices,
SelectionDAG &DAG) {
assert((Indices.size() % 2) == 0);
int SplatIndex = -1;
for (const auto &V : Indices) {
if (V != -1) {
SplatIndex = V;
break;
}
}
return fitsRegularPattern<int>(Indices.begin(), 1, Indices.end(), SplatIndex,
0);
}
// Lower VECTOR_SHUFFLE into ILVEV (if possible).
//
// ILVEV interleaves the even elements from each vector.
//
// It is possible to lower into ILVEV when the mask consists of two of the
// following forms interleaved:
// <0, 2, 4, ...>
// <n, n+2, n+4, ...>
// where n is the number of elements in the vector.
// For example:
// <0, 0, 2, 2, 4, 4, ...>
// <0, n, 2, n+2, 4, n+4, ...>
//
// When undef's appear in the mask they are treated as if they were whatever
// value is necessary in order to fit the above forms.
static SDValue lowerVECTOR_SHUFFLE_ILVEV(SDValue Op, EVT ResTy,
SmallVector<int, 16> Indices,
SelectionDAG &DAG) {
assert((Indices.size() % 2) == 0);
SDValue Wt;
SDValue Ws;
const auto &Begin = Indices.begin();
const auto &End = Indices.end();
// Check even elements are taken from the even elements of one half or the
// other and pick an operand accordingly.
if (fitsRegularPattern<int>(Begin, 2, End, 0, 2))
Wt = Op->getOperand(0);
else if (fitsRegularPattern<int>(Begin, 2, End, Indices.size(), 2))
Wt = Op->getOperand(1);
else
return SDValue();
// Check odd elements are taken from the even elements of one half or the
// other and pick an operand accordingly.
if (fitsRegularPattern<int>(Begin + 1, 2, End, 0, 2))
Ws = Op->getOperand(0);
else if (fitsRegularPattern<int>(Begin + 1, 2, End, Indices.size(), 2))
Ws = Op->getOperand(1);
else
return SDValue();
return DAG.getNode(MipsISD::ILVEV, SDLoc(Op), ResTy, Ws, Wt);
}
// Lower VECTOR_SHUFFLE into ILVOD (if possible).
//
// ILVOD interleaves the odd elements from each vector.
//
// It is possible to lower into ILVOD when the mask consists of two of the
// following forms interleaved:
// <1, 3, 5, ...>
// <n+1, n+3, n+5, ...>
// where n is the number of elements in the vector.
// For example:
// <1, 1, 3, 3, 5, 5, ...>
// <1, n+1, 3, n+3, 5, n+5, ...>
//
// When undef's appear in the mask they are treated as if they were whatever
// value is necessary in order to fit the above forms.
static SDValue lowerVECTOR_SHUFFLE_ILVOD(SDValue Op, EVT ResTy,
SmallVector<int, 16> Indices,
SelectionDAG &DAG) {
assert((Indices.size() % 2) == 0);
SDValue Wt;
SDValue Ws;
const auto &Begin = Indices.begin();
const auto &End = Indices.end();
// Check even elements are taken from the odd elements of one half or the
// other and pick an operand accordingly.
if (fitsRegularPattern<int>(Begin, 2, End, 1, 2))
Wt = Op->getOperand(0);
else if (fitsRegularPattern<int>(Begin, 2, End, Indices.size() + 1, 2))
Wt = Op->getOperand(1);
else
return SDValue();
// Check odd elements are taken from the odd elements of one half or the
// other and pick an operand accordingly.
if (fitsRegularPattern<int>(Begin + 1, 2, End, 1, 2))
Ws = Op->getOperand(0);
else if (fitsRegularPattern<int>(Begin + 1, 2, End, Indices.size() + 1, 2))
Ws = Op->getOperand(1);
else
return SDValue();
return DAG.getNode(MipsISD::ILVOD, SDLoc(Op), ResTy, Wt, Ws);
}
// Lower VECTOR_SHUFFLE into ILVR (if possible).
//
// ILVR interleaves consecutive elements from the right (lowest-indexed) half of
// each vector.
//
// It is possible to lower into ILVR when the mask consists of two of the
// following forms interleaved:
// <0, 1, 2, ...>
// <n, n+1, n+2, ...>
// where n is the number of elements in the vector.
// For example:
// <0, 0, 1, 1, 2, 2, ...>
// <0, n, 1, n+1, 2, n+2, ...>
//
// When undef's appear in the mask they are treated as if they were whatever
// value is necessary in order to fit the above forms.
static SDValue lowerVECTOR_SHUFFLE_ILVR(SDValue Op, EVT ResTy,
SmallVector<int, 16> Indices,
SelectionDAG &DAG) {
assert((Indices.size() % 2) == 0);
SDValue Wt;
SDValue Ws;
const auto &Begin = Indices.begin();
const auto &End = Indices.end();
// Check even elements are taken from the right (lowest-indexed) elements of
// one half or the other and pick an operand accordingly.
if (fitsRegularPattern<int>(Begin, 2, End, 0, 1))
Wt = Op->getOperand(0);
else if (fitsRegularPattern<int>(Begin, 2, End, Indices.size(), 1))
Wt = Op->getOperand(1);
else
return SDValue();
// Check odd elements are taken from the right (lowest-indexed) elements of
// one half or the other and pick an operand accordingly.
if (fitsRegularPattern<int>(Begin + 1, 2, End, 0, 1))
Ws = Op->getOperand(0);
else if (fitsRegularPattern<int>(Begin + 1, 2, End, Indices.size(), 1))
Ws = Op->getOperand(1);
else
return SDValue();
return DAG.getNode(MipsISD::ILVR, SDLoc(Op), ResTy, Ws, Wt);
}
// Lower VECTOR_SHUFFLE into ILVL (if possible).
//
// ILVL interleaves consecutive elements from the left (highest-indexed) half
// of each vector.
//
// It is possible to lower into ILVL when the mask consists of two of the
// following forms interleaved:
// <x, x+1, x+2, ...>
// <n+x, n+x+1, n+x+2, ...>
// where n is the number of elements in the vector and x is half n.
// For example:
// <x, x, x+1, x+1, x+2, x+2, ...>
// <x, n+x, x+1, n+x+1, x+2, n+x+2, ...>
//
// When undef's appear in the mask they are treated as if they were whatever
// value is necessary in order to fit the above forms.
static SDValue lowerVECTOR_SHUFFLE_ILVL(SDValue Op, EVT ResTy,
SmallVector<int, 16> Indices,
SelectionDAG &DAG) {
assert((Indices.size() % 2) == 0);
unsigned HalfSize = Indices.size() / 2;
SDValue Wt;
SDValue Ws;
const auto &Begin = Indices.begin();
const auto &End = Indices.end();
// Check even elements are taken from the left (highest-indexed) elements of
// one half or the other and pick an operand accordingly.
if (fitsRegularPattern<int>(Begin, 2, End, HalfSize, 1))
Wt = Op->getOperand(0);
else if (fitsRegularPattern<int>(Begin, 2, End, Indices.size() + HalfSize, 1))
Wt = Op->getOperand(1);
else
return SDValue();
// Check odd elements are taken from the left (highest-indexed) elements of
// one half or the other and pick an operand accordingly.
if (fitsRegularPattern<int>(Begin + 1, 2, End, HalfSize, 1))
Ws = Op->getOperand(0);
else if (fitsRegularPattern<int>(Begin + 1, 2, End, Indices.size() + HalfSize,
1))
Ws = Op->getOperand(1);
else
return SDValue();
return DAG.getNode(MipsISD::ILVL, SDLoc(Op), ResTy, Ws, Wt);
}
// Lower VECTOR_SHUFFLE into PCKEV (if possible).
//
// PCKEV copies the even elements of each vector into the result vector.
//
// It is possible to lower into PCKEV when the mask consists of two of the
// following forms concatenated:
// <0, 2, 4, ...>
// <n, n+2, n+4, ...>
// where n is the number of elements in the vector.
// For example:
// <0, 2, 4, ..., 0, 2, 4, ...>
// <0, 2, 4, ..., n, n+2, n+4, ...>
//
// When undef's appear in the mask they are treated as if they were whatever
// value is necessary in order to fit the above forms.
static SDValue lowerVECTOR_SHUFFLE_PCKEV(SDValue Op, EVT ResTy,
SmallVector<int, 16> Indices,
SelectionDAG &DAG) {
assert((Indices.size() % 2) == 0);
SDValue Wt;
SDValue Ws;
const auto &Begin = Indices.begin();
const auto &Mid = Indices.begin() + Indices.size() / 2;
const auto &End = Indices.end();
if (fitsRegularPattern<int>(Begin, 1, Mid, 0, 2))
Wt = Op->getOperand(0);
else if (fitsRegularPattern<int>(Begin, 1, Mid, Indices.size(), 2))
Wt = Op->getOperand(1);
else
return SDValue();
if (fitsRegularPattern<int>(Mid, 1, End, 0, 2))
Ws = Op->getOperand(0);
else if (fitsRegularPattern<int>(Mid, 1, End, Indices.size(), 2))
Ws = Op->getOperand(1);
else
return SDValue();
return DAG.getNode(MipsISD::PCKEV, SDLoc(Op), ResTy, Ws, Wt);
}
// Lower VECTOR_SHUFFLE into PCKOD (if possible).
//
// PCKOD copies the odd elements of each vector into the result vector.
//
// It is possible to lower into PCKOD when the mask consists of two of the
// following forms concatenated:
// <1, 3, 5, ...>
// <n+1, n+3, n+5, ...>
// where n is the number of elements in the vector.
// For example:
// <1, 3, 5, ..., 1, 3, 5, ...>
// <1, 3, 5, ..., n+1, n+3, n+5, ...>
//
// When undef's appear in the mask they are treated as if they were whatever
// value is necessary in order to fit the above forms.
static SDValue lowerVECTOR_SHUFFLE_PCKOD(SDValue Op, EVT ResTy,
SmallVector<int, 16> Indices,
SelectionDAG &DAG) {
assert((Indices.size() % 2) == 0);
SDValue Wt;
SDValue Ws;
const auto &Begin = Indices.begin();
const auto &Mid = Indices.begin() + Indices.size() / 2;
const auto &End = Indices.end();
if (fitsRegularPattern<int>(Begin, 1, Mid, 1, 2))
Wt = Op->getOperand(0);
else if (fitsRegularPattern<int>(Begin, 1, Mid, Indices.size() + 1, 2))
Wt = Op->getOperand(1);
else
return SDValue();
if (fitsRegularPattern<int>(Mid, 1, End, 1, 2))
Ws = Op->getOperand(0);
else if (fitsRegularPattern<int>(Mid, 1, End, Indices.size() + 1, 2))
Ws = Op->getOperand(1);
else
return SDValue();
return DAG.getNode(MipsISD::PCKOD, SDLoc(Op), ResTy, Ws, Wt);
}
// Lower VECTOR_SHUFFLE into VSHF.
//
// This mostly consists of converting the shuffle indices in Indices into a
// BUILD_VECTOR and adding it as an operand to the resulting VSHF. There is
// also code to eliminate unused operands of the VECTOR_SHUFFLE. For example,
// if the type is v8i16 and all the indices are less than 8 then the second
// operand is unused and can be replaced with anything. We choose to replace it
// with the used operand since this reduces the number of instructions overall.
static SDValue lowerVECTOR_SHUFFLE_VSHF(SDValue Op, EVT ResTy,
SmallVector<int, 16> Indices,
SelectionDAG &DAG) {
SmallVector<SDValue, 16> Ops;
SDValue Op0;
SDValue Op1;
EVT MaskVecTy = ResTy.changeVectorElementTypeToInteger();
EVT MaskEltTy = MaskVecTy.getVectorElementType();
bool Using1stVec = false;
bool Using2ndVec = false;
SDLoc DL(Op);
int ResTyNumElts = ResTy.getVectorNumElements();
for (int i = 0; i < ResTyNumElts; ++i) {
// Idx == -1 means UNDEF
int Idx = Indices[i];
if (0 <= Idx && Idx < ResTyNumElts)
Using1stVec = true;
if (ResTyNumElts <= Idx && Idx < ResTyNumElts * 2)
Using2ndVec = true;
}
for (SmallVector<int, 16>::iterator I = Indices.begin(); I != Indices.end();
++I)
Ops.push_back(DAG.getTargetConstant(*I, DL, MaskEltTy));
SDValue MaskVec = DAG.getBuildVector(MaskVecTy, DL, Ops);
if (Using1stVec && Using2ndVec) {
Op0 = Op->getOperand(0);
Op1 = Op->getOperand(1);
} else if (Using1stVec)
Op0 = Op1 = Op->getOperand(0);
else if (Using2ndVec)
Op0 = Op1 = Op->getOperand(1);
else
llvm_unreachable("shuffle vector mask references neither vector operand?");
// VECTOR_SHUFFLE concatenates the vectors in an vectorwise fashion.
// <0b00, 0b01> + <0b10, 0b11> -> <0b00, 0b01, 0b10, 0b11>
// VSHF concatenates the vectors in a bitwise fashion:
// <0b00, 0b01> + <0b10, 0b11> ->
// 0b0100 + 0b1110 -> 0b01001110
// <0b10, 0b11, 0b00, 0b01>
// We must therefore swap the operands to get the correct result.
return DAG.getNode(MipsISD::VSHF, DL, ResTy, MaskVec, Op1, Op0);
}
// Lower VECTOR_SHUFFLE into one of a number of instructions depending on the
// indices in the shuffle.
SDValue MipsSETargetLowering::lowerVECTOR_SHUFFLE(SDValue Op,
SelectionDAG &DAG) const {
ShuffleVectorSDNode *Node = cast<ShuffleVectorSDNode>(Op);
EVT ResTy = Op->getValueType(0);
if (!ResTy.is128BitVector())
return SDValue();
int ResTyNumElts = ResTy.getVectorNumElements();
SmallVector<int, 16> Indices;
for (int i = 0; i < ResTyNumElts; ++i)
Indices.push_back(Node->getMaskElt(i));
// splati.[bhwd] is preferable to the others but is matched from
// MipsISD::VSHF.
if (isVECTOR_SHUFFLE_SPLATI(Op, ResTy, Indices, DAG))
return lowerVECTOR_SHUFFLE_VSHF(Op, ResTy, Indices, DAG);
SDValue Result;
if ((Result = lowerVECTOR_SHUFFLE_ILVEV(Op, ResTy, Indices, DAG)))
return Result;
if ((Result = lowerVECTOR_SHUFFLE_ILVOD(Op, ResTy, Indices, DAG)))
return Result;
if ((Result = lowerVECTOR_SHUFFLE_ILVL(Op, ResTy, Indices, DAG)))
return Result;
if ((Result = lowerVECTOR_SHUFFLE_ILVR(Op, ResTy, Indices, DAG)))
return Result;
if ((Result = lowerVECTOR_SHUFFLE_PCKEV(Op, ResTy, Indices, DAG)))
return Result;
if ((Result = lowerVECTOR_SHUFFLE_PCKOD(Op, ResTy, Indices, DAG)))
return Result;
if ((Result = lowerVECTOR_SHUFFLE_SHF(Op, ResTy, Indices, DAG)))
return Result;
return lowerVECTOR_SHUFFLE_VSHF(Op, ResTy, Indices, DAG);
}
MachineBasicBlock *
MipsSETargetLowering::emitBPOSGE32(MachineInstr &MI,
MachineBasicBlock *BB) const {
// $bb:
// bposge32_pseudo $vr0
// =>
// $bb:
// bposge32 $tbb
// $fbb:
// li $vr2, 0
// b $sink
// $tbb:
// li $vr1, 1
// $sink:
// $vr0 = phi($vr2, $fbb, $vr1, $tbb)
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
const TargetRegisterClass *RC = &Mips::GPR32RegClass;
DebugLoc DL = MI.getDebugLoc();
const BasicBlock *LLVM_BB = BB->getBasicBlock();
MachineFunction::iterator It = std::next(MachineFunction::iterator(BB));
MachineFunction *F = BB->getParent();
MachineBasicBlock *FBB = F->CreateMachineBasicBlock(LLVM_BB);
MachineBasicBlock *TBB = F->CreateMachineBasicBlock(LLVM_BB);
MachineBasicBlock *Sink = F->CreateMachineBasicBlock(LLVM_BB);
F->insert(It, FBB);
F->insert(It, TBB);
F->insert(It, Sink);
// Transfer the remainder of BB and its successor edges to Sink.
Sink->splice(Sink->begin(), BB, std::next(MachineBasicBlock::iterator(MI)),
BB->end());
Sink->transferSuccessorsAndUpdatePHIs(BB);
// Add successors.
BB->addSuccessor(FBB);
BB->addSuccessor(TBB);
FBB->addSuccessor(Sink);
TBB->addSuccessor(Sink);
// Insert the real bposge32 instruction to $BB.
BuildMI(BB, DL, TII->get(Mips::BPOSGE32)).addMBB(TBB);
// Insert the real bposge32c instruction to $BB.
BuildMI(BB, DL, TII->get(Mips::BPOSGE32C_MMR3)).addMBB(TBB);
// Fill $FBB.
Register VR2 = RegInfo.createVirtualRegister(RC);
BuildMI(*FBB, FBB->end(), DL, TII->get(Mips::ADDiu), VR2)
.addReg(Mips::ZERO).addImm(0);
BuildMI(*FBB, FBB->end(), DL, TII->get(Mips::B)).addMBB(Sink);
// Fill $TBB.
Register VR1 = RegInfo.createVirtualRegister(RC);
BuildMI(*TBB, TBB->end(), DL, TII->get(Mips::ADDiu), VR1)
.addReg(Mips::ZERO).addImm(1);
// Insert phi function to $Sink.
BuildMI(*Sink, Sink->begin(), DL, TII->get(Mips::PHI),
MI.getOperand(0).getReg())
.addReg(VR2)
.addMBB(FBB)
.addReg(VR1)
.addMBB(TBB);
MI.eraseFromParent(); // The pseudo instruction is gone now.
return Sink;
}
MachineBasicBlock *MipsSETargetLowering::emitMSACBranchPseudo(
MachineInstr &MI, MachineBasicBlock *BB, unsigned BranchOp) const {
// $bb:
// vany_nonzero $rd, $ws
// =>
// $bb:
// bnz.b $ws, $tbb
// b $fbb
// $fbb:
// li $rd1, 0
// b $sink
// $tbb:
// li $rd2, 1
// $sink:
// $rd = phi($rd1, $fbb, $rd2, $tbb)
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
const TargetRegisterClass *RC = &Mips::GPR32RegClass;
DebugLoc DL = MI.getDebugLoc();
const BasicBlock *LLVM_BB = BB->getBasicBlock();
MachineFunction::iterator It = std::next(MachineFunction::iterator(BB));
MachineFunction *F = BB->getParent();
MachineBasicBlock *FBB = F->CreateMachineBasicBlock(LLVM_BB);
MachineBasicBlock *TBB = F->CreateMachineBasicBlock(LLVM_BB);
MachineBasicBlock *Sink = F->CreateMachineBasicBlock(LLVM_BB);
F->insert(It, FBB);
F->insert(It, TBB);
F->insert(It, Sink);
// Transfer the remainder of BB and its successor edges to Sink.
Sink->splice(Sink->begin(), BB, std::next(MachineBasicBlock::iterator(MI)),
BB->end());
Sink->transferSuccessorsAndUpdatePHIs(BB);
// Add successors.
BB->addSuccessor(FBB);
BB->addSuccessor(TBB);
FBB->addSuccessor(Sink);
TBB->addSuccessor(Sink);
// Insert the real bnz.b instruction to $BB.
BuildMI(BB, DL, TII->get(BranchOp))
.addReg(MI.getOperand(1).getReg())
.addMBB(TBB);
// Fill $FBB.
Register RD1 = RegInfo.createVirtualRegister(RC);
BuildMI(*FBB, FBB->end(), DL, TII->get(Mips::ADDiu), RD1)
.addReg(Mips::ZERO).addImm(0);
BuildMI(*FBB, FBB->end(), DL, TII->get(Mips::B)).addMBB(Sink);
// Fill $TBB.
Register RD2 = RegInfo.createVirtualRegister(RC);
BuildMI(*TBB, TBB->end(), DL, TII->get(Mips::ADDiu), RD2)
.addReg(Mips::ZERO).addImm(1);
// Insert phi function to $Sink.
BuildMI(*Sink, Sink->begin(), DL, TII->get(Mips::PHI),
MI.getOperand(0).getReg())
.addReg(RD1)
.addMBB(FBB)
.addReg(RD2)
.addMBB(TBB);
MI.eraseFromParent(); // The pseudo instruction is gone now.
return Sink;
}
// Emit the COPY_FW pseudo instruction.
//
// copy_fw_pseudo $fd, $ws, n
// =>
// copy_u_w $rt, $ws, $n
// mtc1 $rt, $fd
//
// When n is zero, the equivalent operation can be performed with (potentially)
// zero instructions due to register overlaps. This optimization is never valid
// for lane 1 because it would require FR=0 mode which isn't supported by MSA.
MachineBasicBlock *
MipsSETargetLowering::emitCOPY_FW(MachineInstr &MI,
MachineBasicBlock *BB) const {
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
DebugLoc DL = MI.getDebugLoc();
Register Fd = MI.getOperand(0).getReg();
Register Ws = MI.getOperand(1).getReg();
unsigned Lane = MI.getOperand(2).getImm();
if (Lane == 0) {
unsigned Wt = Ws;
if (!Subtarget.useOddSPReg()) {
// We must copy to an even-numbered MSA register so that the
// single-precision sub-register is also guaranteed to be even-numbered.
Wt = RegInfo.createVirtualRegister(&Mips::MSA128WEvensRegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::COPY), Wt).addReg(Ws);
}
BuildMI(*BB, MI, DL, TII->get(Mips::COPY), Fd).addReg(Wt, 0, Mips::sub_lo);
} else {
Register Wt = RegInfo.createVirtualRegister(
Subtarget.useOddSPReg() ? &Mips::MSA128WRegClass
: &Mips::MSA128WEvensRegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::SPLATI_W), Wt).addReg(Ws).addImm(Lane);
BuildMI(*BB, MI, DL, TII->get(Mips::COPY), Fd).addReg(Wt, 0, Mips::sub_lo);
}
MI.eraseFromParent(); // The pseudo instruction is gone now.
return BB;
}
// Emit the COPY_FD pseudo instruction.
//
// copy_fd_pseudo $fd, $ws, n
// =>
// splati.d $wt, $ws, $n
// copy $fd, $wt:sub_64
//
// When n is zero, the equivalent operation can be performed with (potentially)
// zero instructions due to register overlaps. This optimization is always
// valid because FR=1 mode which is the only supported mode in MSA.
MachineBasicBlock *
MipsSETargetLowering::emitCOPY_FD(MachineInstr &MI,
MachineBasicBlock *BB) const {
assert(Subtarget.isFP64bit());
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
Register Fd = MI.getOperand(0).getReg();
Register Ws = MI.getOperand(1).getReg();
unsigned Lane = MI.getOperand(2).getImm() * 2;
DebugLoc DL = MI.getDebugLoc();
if (Lane == 0)
BuildMI(*BB, MI, DL, TII->get(Mips::COPY), Fd).addReg(Ws, 0, Mips::sub_64);
else {
Register Wt = RegInfo.createVirtualRegister(&Mips::MSA128DRegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::SPLATI_D), Wt).addReg(Ws).addImm(1);
BuildMI(*BB, MI, DL, TII->get(Mips::COPY), Fd).addReg(Wt, 0, Mips::sub_64);
}
MI.eraseFromParent(); // The pseudo instruction is gone now.
return BB;
}
// Emit the INSERT_FW pseudo instruction.
//
// insert_fw_pseudo $wd, $wd_in, $n, $fs
// =>
// subreg_to_reg $wt:sub_lo, $fs
// insve_w $wd[$n], $wd_in, $wt[0]
MachineBasicBlock *
MipsSETargetLowering::emitINSERT_FW(MachineInstr &MI,
MachineBasicBlock *BB) const {
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
DebugLoc DL = MI.getDebugLoc();
Register Wd = MI.getOperand(0).getReg();
Register Wd_in = MI.getOperand(1).getReg();
unsigned Lane = MI.getOperand(2).getImm();
Register Fs = MI.getOperand(3).getReg();
Register Wt = RegInfo.createVirtualRegister(
Subtarget.useOddSPReg() ? &Mips::MSA128WRegClass
: &Mips::MSA128WEvensRegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::SUBREG_TO_REG), Wt)
.addImm(0)
.addReg(Fs)
.addImm(Mips::sub_lo);
BuildMI(*BB, MI, DL, TII->get(Mips::INSVE_W), Wd)
.addReg(Wd_in)
.addImm(Lane)
.addReg(Wt)
.addImm(0);
MI.eraseFromParent(); // The pseudo instruction is gone now.
return BB;
}
// Emit the INSERT_FD pseudo instruction.
//
// insert_fd_pseudo $wd, $fs, n
// =>
// subreg_to_reg $wt:sub_64, $fs
// insve_d $wd[$n], $wd_in, $wt[0]
MachineBasicBlock *
MipsSETargetLowering::emitINSERT_FD(MachineInstr &MI,
MachineBasicBlock *BB) const {
assert(Subtarget.isFP64bit());
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
DebugLoc DL = MI.getDebugLoc();
Register Wd = MI.getOperand(0).getReg();
Register Wd_in = MI.getOperand(1).getReg();
unsigned Lane = MI.getOperand(2).getImm();
Register Fs = MI.getOperand(3).getReg();
Register Wt = RegInfo.createVirtualRegister(&Mips::MSA128DRegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::SUBREG_TO_REG), Wt)
.addImm(0)
.addReg(Fs)
.addImm(Mips::sub_64);
BuildMI(*BB, MI, DL, TII->get(Mips::INSVE_D), Wd)
.addReg(Wd_in)
.addImm(Lane)
.addReg(Wt)
.addImm(0);
MI.eraseFromParent(); // The pseudo instruction is gone now.
return BB;
}
// Emit the INSERT_([BHWD]|F[WD])_VIDX pseudo instruction.
//
// For integer:
// (INSERT_([BHWD]|F[WD])_PSEUDO $wd, $wd_in, $n, $rs)
// =>
// (SLL $lanetmp1, $lane, <log2size)
// (SLD_B $wdtmp1, $wd_in, $wd_in, $lanetmp1)
// (INSERT_[BHWD], $wdtmp2, $wdtmp1, 0, $rs)
// (NEG $lanetmp2, $lanetmp1)
// (SLD_B $wd, $wdtmp2, $wdtmp2, $lanetmp2)
//
// For floating point:
// (INSERT_([BHWD]|F[WD])_PSEUDO $wd, $wd_in, $n, $fs)
// =>
// (SUBREG_TO_REG $wt, $fs, <subreg>)
// (SLL $lanetmp1, $lane, <log2size)
// (SLD_B $wdtmp1, $wd_in, $wd_in, $lanetmp1)
// (INSVE_[WD], $wdtmp2, 0, $wdtmp1, 0)
// (NEG $lanetmp2, $lanetmp1)
// (SLD_B $wd, $wdtmp2, $wdtmp2, $lanetmp2)
MachineBasicBlock *MipsSETargetLowering::emitINSERT_DF_VIDX(
MachineInstr &MI, MachineBasicBlock *BB, unsigned EltSizeInBytes,
bool IsFP) const {
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
DebugLoc DL = MI.getDebugLoc();
Register Wd = MI.getOperand(0).getReg();
Register SrcVecReg = MI.getOperand(1).getReg();
Register LaneReg = MI.getOperand(2).getReg();
Register SrcValReg = MI.getOperand(3).getReg();
const TargetRegisterClass *VecRC = nullptr;
// FIXME: This should be true for N32 too.
const TargetRegisterClass *GPRRC =
Subtarget.isABI_N64() ? &Mips::GPR64RegClass : &Mips::GPR32RegClass;
unsigned SubRegIdx = Subtarget.isABI_N64() ? Mips::sub_32 : 0;
unsigned ShiftOp = Subtarget.isABI_N64() ? Mips::DSLL : Mips::SLL;
unsigned EltLog2Size;
unsigned InsertOp = 0;
unsigned InsveOp = 0;
switch (EltSizeInBytes) {
default:
llvm_unreachable("Unexpected size");
case 1:
EltLog2Size = 0;
InsertOp = Mips::INSERT_B;
InsveOp = Mips::INSVE_B;
VecRC = &Mips::MSA128BRegClass;
break;
case 2:
EltLog2Size = 1;
InsertOp = Mips::INSERT_H;
InsveOp = Mips::INSVE_H;
VecRC = &Mips::MSA128HRegClass;
break;
case 4:
EltLog2Size = 2;
InsertOp = Mips::INSERT_W;
InsveOp = Mips::INSVE_W;
VecRC = &Mips::MSA128WRegClass;
break;
case 8:
EltLog2Size = 3;
InsertOp = Mips::INSERT_D;
InsveOp = Mips::INSVE_D;
VecRC = &Mips::MSA128DRegClass;
break;
}
if (IsFP) {
Register Wt = RegInfo.createVirtualRegister(VecRC);
BuildMI(*BB, MI, DL, TII->get(Mips::SUBREG_TO_REG), Wt)
.addImm(0)
.addReg(SrcValReg)
.addImm(EltSizeInBytes == 8 ? Mips::sub_64 : Mips::sub_lo);
SrcValReg = Wt;
}
// Convert the lane index into a byte index
if (EltSizeInBytes != 1) {
Register LaneTmp1 = RegInfo.createVirtualRegister(GPRRC);
BuildMI(*BB, MI, DL, TII->get(ShiftOp), LaneTmp1)
.addReg(LaneReg)
.addImm(EltLog2Size);
LaneReg = LaneTmp1;
}
// Rotate bytes around so that the desired lane is element zero
Register WdTmp1 = RegInfo.createVirtualRegister(VecRC);
BuildMI(*BB, MI, DL, TII->get(Mips::SLD_B), WdTmp1)
.addReg(SrcVecReg)
.addReg(SrcVecReg)
.addReg(LaneReg, 0, SubRegIdx);
Register WdTmp2 = RegInfo.createVirtualRegister(VecRC);
if (IsFP) {
// Use insve.df to insert to element zero
BuildMI(*BB, MI, DL, TII->get(InsveOp), WdTmp2)
.addReg(WdTmp1)
.addImm(0)
.addReg(SrcValReg)
.addImm(0);
} else {
// Use insert.df to insert to element zero
BuildMI(*BB, MI, DL, TII->get(InsertOp), WdTmp2)
.addReg(WdTmp1)
.addReg(SrcValReg)
.addImm(0);
}
// Rotate elements the rest of the way for a full rotation.
// sld.df inteprets $rt modulo the number of columns so we only need to negate
// the lane index to do this.
Register LaneTmp2 = RegInfo.createVirtualRegister(GPRRC);
BuildMI(*BB, MI, DL, TII->get(Subtarget.isABI_N64() ? Mips::DSUB : Mips::SUB),
LaneTmp2)
.addReg(Subtarget.isABI_N64() ? Mips::ZERO_64 : Mips::ZERO)
.addReg(LaneReg);
BuildMI(*BB, MI, DL, TII->get(Mips::SLD_B), Wd)
.addReg(WdTmp2)
.addReg(WdTmp2)
.addReg(LaneTmp2, 0, SubRegIdx);
MI.eraseFromParent(); // The pseudo instruction is gone now.
return BB;
}
// Emit the FILL_FW pseudo instruction.
//
// fill_fw_pseudo $wd, $fs
// =>
// implicit_def $wt1
// insert_subreg $wt2:subreg_lo, $wt1, $fs
// splati.w $wd, $wt2[0]
MachineBasicBlock *
MipsSETargetLowering::emitFILL_FW(MachineInstr &MI,
MachineBasicBlock *BB) const {
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
DebugLoc DL = MI.getDebugLoc();
Register Wd = MI.getOperand(0).getReg();
Register Fs = MI.getOperand(1).getReg();
Register Wt1 = RegInfo.createVirtualRegister(
Subtarget.useOddSPReg() ? &Mips::MSA128WRegClass
: &Mips::MSA128WEvensRegClass);
Register Wt2 = RegInfo.createVirtualRegister(
Subtarget.useOddSPReg() ? &Mips::MSA128WRegClass
: &Mips::MSA128WEvensRegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::IMPLICIT_DEF), Wt1);
BuildMI(*BB, MI, DL, TII->get(Mips::INSERT_SUBREG), Wt2)
.addReg(Wt1)
.addReg(Fs)
.addImm(Mips::sub_lo);
BuildMI(*BB, MI, DL, TII->get(Mips::SPLATI_W), Wd).addReg(Wt2).addImm(0);
MI.eraseFromParent(); // The pseudo instruction is gone now.
return BB;
}
// Emit the FILL_FD pseudo instruction.
//
// fill_fd_pseudo $wd, $fs
// =>
// implicit_def $wt1
// insert_subreg $wt2:subreg_64, $wt1, $fs
// splati.d $wd, $wt2[0]
MachineBasicBlock *
MipsSETargetLowering::emitFILL_FD(MachineInstr &MI,
MachineBasicBlock *BB) const {
assert(Subtarget.isFP64bit());
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
DebugLoc DL = MI.getDebugLoc();
Register Wd = MI.getOperand(0).getReg();
Register Fs = MI.getOperand(1).getReg();
Register Wt1 = RegInfo.createVirtualRegister(&Mips::MSA128DRegClass);
Register Wt2 = RegInfo.createVirtualRegister(&Mips::MSA128DRegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::IMPLICIT_DEF), Wt1);
BuildMI(*BB, MI, DL, TII->get(Mips::INSERT_SUBREG), Wt2)
.addReg(Wt1)
.addReg(Fs)
.addImm(Mips::sub_64);
BuildMI(*BB, MI, DL, TII->get(Mips::SPLATI_D), Wd).addReg(Wt2).addImm(0);
MI.eraseFromParent(); // The pseudo instruction is gone now.
return BB;
}
// Emit the ST_F16_PSEDUO instruction to store a f16 value from an MSA
// register.
//
// STF16 MSA128F16:$wd, mem_simm10:$addr
// =>
// copy_u.h $rtemp,$wd[0]
// sh $rtemp, $addr
//
// Safety: We can't use st.h & co as they would over write the memory after
// the destination. It would require half floats be allocated 16 bytes(!) of
// space.
MachineBasicBlock *
MipsSETargetLowering::emitST_F16_PSEUDO(MachineInstr &MI,
MachineBasicBlock *BB) const {
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
DebugLoc DL = MI.getDebugLoc();
Register Ws = MI.getOperand(0).getReg();
Register Rt = MI.getOperand(1).getReg();
const MachineMemOperand &MMO = **MI.memoperands_begin();
unsigned Imm = MMO.getOffset();
// Caution: A load via the GOT can expand to a GPR32 operand, a load via
// spill and reload can expand as a GPR64 operand. Examine the
// operand in detail and default to ABI.
const TargetRegisterClass *RC =
MI.getOperand(1).isReg() ? RegInfo.getRegClass(MI.getOperand(1).getReg())
: (Subtarget.isABI_O32() ? &Mips::GPR32RegClass
: &Mips::GPR64RegClass);
const bool UsingMips32 = RC == &Mips::GPR32RegClass;
Register Rs = RegInfo.createVirtualRegister(&Mips::GPR32RegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::COPY_U_H), Rs).addReg(Ws).addImm(0);
if(!UsingMips32) {
Register Tmp = RegInfo.createVirtualRegister(&Mips::GPR64RegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::SUBREG_TO_REG), Tmp)
.addImm(0)
.addReg(Rs)
.addImm(Mips::sub_32);
Rs = Tmp;
}
BuildMI(*BB, MI, DL, TII->get(UsingMips32 ? Mips::SH : Mips::SH64))
.addReg(Rs)
.addReg(Rt)
.addImm(Imm)
.addMemOperand(BB->getParent()->getMachineMemOperand(
&MMO, MMO.getOffset(), MMO.getSize()));
MI.eraseFromParent();
return BB;
}
// Emit the LD_F16_PSEDUO instruction to load a f16 value into an MSA register.
//
// LD_F16 MSA128F16:$wd, mem_simm10:$addr
// =>
// lh $rtemp, $addr
// fill.h $wd, $rtemp
//
// Safety: We can't use ld.h & co as they over-read from the source.
// Additionally, if the address is not modulo 16, 2 cases can occur:
// a) Segmentation fault as the load instruction reads from a memory page
// memory it's not supposed to.
// b) The load crosses an implementation specific boundary, requiring OS
// intervention.
MachineBasicBlock *
MipsSETargetLowering::emitLD_F16_PSEUDO(MachineInstr &MI,
MachineBasicBlock *BB) const {
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
DebugLoc DL = MI.getDebugLoc();
Register Wd = MI.getOperand(0).getReg();
// Caution: A load via the GOT can expand to a GPR32 operand, a load via
// spill and reload can expand as a GPR64 operand. Examine the
// operand in detail and default to ABI.
const TargetRegisterClass *RC =
MI.getOperand(1).isReg() ? RegInfo.getRegClass(MI.getOperand(1).getReg())
: (Subtarget.isABI_O32() ? &Mips::GPR32RegClass
: &Mips::GPR64RegClass);
const bool UsingMips32 = RC == &Mips::GPR32RegClass;
Register Rt = RegInfo.createVirtualRegister(RC);
MachineInstrBuilder MIB =
BuildMI(*BB, MI, DL, TII->get(UsingMips32 ? Mips::LH : Mips::LH64), Rt);
for (unsigned i = 1; i < MI.getNumOperands(); i++)
MIB.add(MI.getOperand(i));
if(!UsingMips32) {
Register Tmp = RegInfo.createVirtualRegister(&Mips::GPR32RegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::COPY), Tmp).addReg(Rt, 0, Mips::sub_32);
Rt = Tmp;
}
BuildMI(*BB, MI, DL, TII->get(Mips::FILL_H), Wd).addReg(Rt);
MI.eraseFromParent();
return BB;
}
// Emit the FPROUND_PSEUDO instruction.
//
// Round an FGR64Opnd, FGR32Opnd to an f16.
//
// Safety: Cycle the operand through the GPRs so the result always ends up
// the correct MSA register.
//
// FIXME: This copying is strictly unnecessary. If we could tie FGR32Opnd:$Fs
// / FGR64Opnd:$Fs and MSA128F16:$Wd to the same physical register
// (which they can be, as the MSA registers are defined to alias the
// FPU's 64 bit and 32 bit registers) the result can be accessed using
// the correct register class. That requires operands be tie-able across
// register classes which have a sub/super register class relationship.
//
// For FPG32Opnd:
//
// FPROUND MSA128F16:$wd, FGR32Opnd:$fs
// =>
// mfc1 $rtemp, $fs
// fill.w $rtemp, $wtemp
// fexdo.w $wd, $wtemp, $wtemp
//
// For FPG64Opnd on mips32r2+:
//
// FPROUND MSA128F16:$wd, FGR64Opnd:$fs
// =>
// mfc1 $rtemp, $fs
// fill.w $rtemp, $wtemp
// mfhc1 $rtemp2, $fs
// insert.w $wtemp[1], $rtemp2
// insert.w $wtemp[3], $rtemp2
// fexdo.w $wtemp2, $wtemp, $wtemp
// fexdo.h $wd, $temp2, $temp2
//
// For FGR64Opnd on mips64r2+:
//
// FPROUND MSA128F16:$wd, FGR64Opnd:$fs
// =>
// dmfc1 $rtemp, $fs
// fill.d $rtemp, $wtemp
// fexdo.w $wtemp2, $wtemp, $wtemp
// fexdo.h $wd, $wtemp2, $wtemp2
//
// Safety note: As $wtemp is UNDEF, we may provoke a spurious exception if the
// undef bits are "just right" and the exception enable bits are
// set. By using fill.w to replicate $fs into all elements over
// insert.w for one element, we avoid that potiential case. If
// fexdo.[hw] causes an exception in, the exception is valid and it
// occurs for all elements.
MachineBasicBlock *
MipsSETargetLowering::emitFPROUND_PSEUDO(MachineInstr &MI,
MachineBasicBlock *BB,
bool IsFGR64) const {
// Strictly speaking, we need MIPS32R5 to support MSA. We'll be generous
// here. It's technically doable to support MIPS32 here, but the ISA forbids
// it.
assert(Subtarget.hasMSA() && Subtarget.hasMips32r2());
bool IsFGR64onMips64 = Subtarget.hasMips64() && IsFGR64;
bool IsFGR64onMips32 = !Subtarget.hasMips64() && IsFGR64;
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
DebugLoc DL = MI.getDebugLoc();
Register Wd = MI.getOperand(0).getReg();
Register Fs = MI.getOperand(1).getReg();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
Register Wtemp = RegInfo.createVirtualRegister(&Mips::MSA128WRegClass);
const TargetRegisterClass *GPRRC =
IsFGR64onMips64 ? &Mips::GPR64RegClass : &Mips::GPR32RegClass;
unsigned MFC1Opc = IsFGR64onMips64
? Mips::DMFC1
: (IsFGR64onMips32 ? Mips::MFC1_D64 : Mips::MFC1);
unsigned FILLOpc = IsFGR64onMips64 ? Mips::FILL_D : Mips::FILL_W;
// Perform the register class copy as mentioned above.
Register Rtemp = RegInfo.createVirtualRegister(GPRRC);
BuildMI(*BB, MI, DL, TII->get(MFC1Opc), Rtemp).addReg(Fs);
BuildMI(*BB, MI, DL, TII->get(FILLOpc), Wtemp).addReg(Rtemp);
unsigned WPHI = Wtemp;
if (IsFGR64onMips32) {
Register Rtemp2 = RegInfo.createVirtualRegister(GPRRC);
BuildMI(*BB, MI, DL, TII->get(Mips::MFHC1_D64), Rtemp2).addReg(Fs);
Register Wtemp2 = RegInfo.createVirtualRegister(&Mips::MSA128WRegClass);
Register Wtemp3 = RegInfo.createVirtualRegister(&Mips::MSA128WRegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::INSERT_W), Wtemp2)
.addReg(Wtemp)
.addReg(Rtemp2)
.addImm(1);
BuildMI(*BB, MI, DL, TII->get(Mips::INSERT_W), Wtemp3)
.addReg(Wtemp2)
.addReg(Rtemp2)
.addImm(3);
WPHI = Wtemp3;
}
if (IsFGR64) {
Register Wtemp2 = RegInfo.createVirtualRegister(&Mips::MSA128WRegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::FEXDO_W), Wtemp2)
.addReg(WPHI)
.addReg(WPHI);
WPHI = Wtemp2;
}
BuildMI(*BB, MI, DL, TII->get(Mips::FEXDO_H), Wd).addReg(WPHI).addReg(WPHI);
MI.eraseFromParent();
return BB;
}
// Emit the FPEXTEND_PSEUDO instruction.
//
// Expand an f16 to either a FGR32Opnd or FGR64Opnd.
//
// Safety: Cycle the result through the GPRs so the result always ends up
// the correct floating point register.
//
// FIXME: This copying is strictly unnecessary. If we could tie FGR32Opnd:$Fd
// / FGR64Opnd:$Fd and MSA128F16:$Ws to the same physical register
// (which they can be, as the MSA registers are defined to alias the
// FPU's 64 bit and 32 bit registers) the result can be accessed using
// the correct register class. That requires operands be tie-able across
// register classes which have a sub/super register class relationship. I
// haven't checked.
//
// For FGR32Opnd:
//
// FPEXTEND FGR32Opnd:$fd, MSA128F16:$ws
// =>
// fexupr.w $wtemp, $ws
// copy_s.w $rtemp, $ws[0]
// mtc1 $rtemp, $fd
//
// For FGR64Opnd on Mips64:
//
// FPEXTEND FGR64Opnd:$fd, MSA128F16:$ws
// =>
// fexupr.w $wtemp, $ws
// fexupr.d $wtemp2, $wtemp
// copy_s.d $rtemp, $wtemp2s[0]
// dmtc1 $rtemp, $fd
//
// For FGR64Opnd on Mips32:
//
// FPEXTEND FGR64Opnd:$fd, MSA128F16:$ws
// =>
// fexupr.w $wtemp, $ws
// fexupr.d $wtemp2, $wtemp
// copy_s.w $rtemp, $wtemp2[0]
// mtc1 $rtemp, $ftemp
// copy_s.w $rtemp2, $wtemp2[1]
// $fd = mthc1 $rtemp2, $ftemp
MachineBasicBlock *
MipsSETargetLowering::emitFPEXTEND_PSEUDO(MachineInstr &MI,
MachineBasicBlock *BB,
bool IsFGR64) const {
// Strictly speaking, we need MIPS32R5 to support MSA. We'll be generous
// here. It's technically doable to support MIPS32 here, but the ISA forbids
// it.
assert(Subtarget.hasMSA() && Subtarget.hasMips32r2());
bool IsFGR64onMips64 = Subtarget.hasMips64() && IsFGR64;
bool IsFGR64onMips32 = !Subtarget.hasMips64() && IsFGR64;
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
DebugLoc DL = MI.getDebugLoc();
Register Fd = MI.getOperand(0).getReg();
Register Ws = MI.getOperand(1).getReg();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
const TargetRegisterClass *GPRRC =
IsFGR64onMips64 ? &Mips::GPR64RegClass : &Mips::GPR32RegClass;
unsigned MTC1Opc = IsFGR64onMips64
? Mips::DMTC1
: (IsFGR64onMips32 ? Mips::MTC1_D64 : Mips::MTC1);
Register COPYOpc = IsFGR64onMips64 ? Mips::COPY_S_D : Mips::COPY_S_W;
Register Wtemp = RegInfo.createVirtualRegister(&Mips::MSA128WRegClass);
Register WPHI = Wtemp;
BuildMI(*BB, MI, DL, TII->get(Mips::FEXUPR_W), Wtemp).addReg(Ws);
if (IsFGR64) {
WPHI = RegInfo.createVirtualRegister(&Mips::MSA128DRegClass);
BuildMI(*BB, MI, DL, TII->get(Mips::FEXUPR_D), WPHI).addReg(Wtemp);
}
// Perform the safety regclass copy mentioned above.
Register Rtemp = RegInfo.createVirtualRegister(GPRRC);
Register FPRPHI = IsFGR64onMips32
? RegInfo.createVirtualRegister(&Mips::FGR64RegClass)
: Fd;
BuildMI(*BB, MI, DL, TII->get(COPYOpc), Rtemp).addReg(WPHI).addImm(0);
BuildMI(*BB, MI, DL, TII->get(MTC1Opc), FPRPHI).addReg(Rtemp);
if (IsFGR64onMips32) {
Register Rtemp2 = RegInfo.createVirtualRegister(GPRRC);
BuildMI(*BB, MI, DL, TII->get(Mips::COPY_S_W), Rtemp2)
.addReg(WPHI)
.addImm(1);
BuildMI(*BB, MI, DL, TII->get(Mips::MTHC1_D64), Fd)
.addReg(FPRPHI)
.addReg(Rtemp2);
}
MI.eraseFromParent();
return BB;
}
// Emit the FEXP2_W_1 pseudo instructions.
//
// fexp2_w_1_pseudo $wd, $wt
// =>
// ldi.w $ws, 1
// fexp2.w $wd, $ws, $wt
MachineBasicBlock *
MipsSETargetLowering::emitFEXP2_W_1(MachineInstr &MI,
MachineBasicBlock *BB) const {
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
const TargetRegisterClass *RC = &Mips::MSA128WRegClass;
Register Ws1 = RegInfo.createVirtualRegister(RC);
Register Ws2 = RegInfo.createVirtualRegister(RC);
DebugLoc DL = MI.getDebugLoc();
// Splat 1.0 into a vector
BuildMI(*BB, MI, DL, TII->get(Mips::LDI_W), Ws1).addImm(1);
BuildMI(*BB, MI, DL, TII->get(Mips::FFINT_U_W), Ws2).addReg(Ws1);
// Emit 1.0 * fexp2(Wt)
BuildMI(*BB, MI, DL, TII->get(Mips::FEXP2_W), MI.getOperand(0).getReg())
.addReg(Ws2)
.addReg(MI.getOperand(1).getReg());
MI.eraseFromParent(); // The pseudo instruction is gone now.
return BB;
}
// Emit the FEXP2_D_1 pseudo instructions.
//
// fexp2_d_1_pseudo $wd, $wt
// =>
// ldi.d $ws, 1
// fexp2.d $wd, $ws, $wt
MachineBasicBlock *
MipsSETargetLowering::emitFEXP2_D_1(MachineInstr &MI,
MachineBasicBlock *BB) const {
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
MachineRegisterInfo &RegInfo = BB->getParent()->getRegInfo();
const TargetRegisterClass *RC = &Mips::MSA128DRegClass;
Register Ws1 = RegInfo.createVirtualRegister(RC);
Register Ws2 = RegInfo.createVirtualRegister(RC);
DebugLoc DL = MI.getDebugLoc();
// Splat 1.0 into a vector
BuildMI(*BB, MI, DL, TII->get(Mips::LDI_D), Ws1).addImm(1);
BuildMI(*BB, MI, DL, TII->get(Mips::FFINT_U_D), Ws2).addReg(Ws1);
// Emit 1.0 * fexp2(Wt)
BuildMI(*BB, MI, DL, TII->get(Mips::FEXP2_D), MI.getOperand(0).getReg())
.addReg(Ws2)
.addReg(MI.getOperand(1).getReg());
MI.eraseFromParent(); // The pseudo instruction is gone now.
return BB;
}
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