2239 lines
64 KiB
C++
2239 lines
64 KiB
C++
/*
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* Tiny Code Generator for QEMU
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*
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* Copyright (c) 2018 SiFive, Inc
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* Copyright (c) 2008-2009 Arnaud Patard <arnaud.patard@rtp-net.org>
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* Copyright (c) 2009 Aurelien Jarno <aurelien@aurel32.net>
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* Copyright (c) 2008 Fabrice Bellard
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*
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* Based on i386/tcg-target.c and mips/tcg-target.c
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "../tcg-ldst.c.inc"
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#include "../tcg-pool.c.inc"
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#ifdef CONFIG_DEBUG_TCG
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static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
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"zero",
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"ra",
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"sp",
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"gp",
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"tp",
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"t0",
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"t1",
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"t2",
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"s0",
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"s1",
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"a0",
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"a1",
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"a2",
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"a3",
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"a4",
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"a5",
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"a6",
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"a7",
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"s2",
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"s3",
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"s4",
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"s5",
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"s6",
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"s7",
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"s8",
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"s9",
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"s10",
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"s11",
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"t3",
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"t4",
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"t5",
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"t6"
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};
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#endif
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static const int tcg_target_reg_alloc_order[] = {
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/* Call saved registers */
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/* TCG_REG_S0 reserved for TCG_AREG0 */
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TCG_REG_S1,
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TCG_REG_S2,
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TCG_REG_S3,
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TCG_REG_S4,
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TCG_REG_S5,
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TCG_REG_S6,
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TCG_REG_S7,
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TCG_REG_S8,
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TCG_REG_S9,
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TCG_REG_S10,
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TCG_REG_S11,
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/* Call clobbered registers */
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TCG_REG_T0,
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TCG_REG_T1,
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TCG_REG_T2,
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TCG_REG_T3,
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TCG_REG_T4,
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TCG_REG_T5,
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TCG_REG_T6,
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/* Argument registers */
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TCG_REG_A0,
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TCG_REG_A1,
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TCG_REG_A2,
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TCG_REG_A3,
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TCG_REG_A4,
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TCG_REG_A5,
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TCG_REG_A6,
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TCG_REG_A7,
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};
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static const int tcg_target_call_iarg_regs[] = {
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TCG_REG_A0,
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TCG_REG_A1,
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TCG_REG_A2,
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TCG_REG_A3,
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TCG_REG_A4,
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TCG_REG_A5,
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TCG_REG_A6,
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TCG_REG_A7,
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};
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#ifndef have_zbb
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bool have_zbb;
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#endif
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#if defined(__riscv_arch_test) && defined(__riscv_zba)
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# define have_zba true
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#else
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static bool have_zba;
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#endif
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#if defined(__riscv_arch_test) && defined(__riscv_zicond)
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# define have_zicond true
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#else
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static bool have_zicond;
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#endif
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static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
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{
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tcg_debug_assert(kind == TCG_CALL_RET_NORMAL);
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tcg_debug_assert(slot >= 0 && slot <= 1);
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return TCG_REG_A0 + slot;
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}
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#define TCG_CT_CONST_ZERO 0x100
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#define TCG_CT_CONST_S12 0x200
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#define TCG_CT_CONST_N12 0x400
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#define TCG_CT_CONST_M12 0x800
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#define TCG_CT_CONST_J12 0x1000
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#define ALL_GENERAL_REGS MAKE_64BIT_MASK(0, 32)
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#define sextreg sextract64
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/* test if a constant matches the constraint */
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static bool tcg_target_const_match(int64_t val, TCGType type, int ct, int vece)
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{
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if (ct & TCG_CT_CONST) {
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return 1;
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}
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if ((ct & TCG_CT_CONST_ZERO) && val == 0) {
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return 1;
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}
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/*
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* Sign extended from 12 bits: [-0x800, 0x7ff].
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* Used for most arithmetic, as this is the isa field.
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*/
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if ((ct & TCG_CT_CONST_S12) && val >= -0x800 && val <= 0x7ff) {
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return 1;
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}
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/*
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* Sign extended from 12 bits, negated: [-0x7ff, 0x800].
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* Used for subtraction, where a constant must be handled by ADDI.
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*/
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if ((ct & TCG_CT_CONST_N12) && val >= -0x7ff && val <= 0x800) {
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return 1;
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}
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/*
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* Sign extended from 12 bits, +/- matching: [-0x7ff, 0x7ff].
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* Used by addsub2 and movcond, which may need the negative value,
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* and requires the modified constant to be representable.
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*/
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if ((ct & TCG_CT_CONST_M12) && val >= -0x7ff && val <= 0x7ff) {
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return 1;
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}
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/*
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* Inverse of sign extended from 12 bits: ~[-0x800, 0x7ff].
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* Used to map ANDN back to ANDI, etc.
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*/
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if ((ct & TCG_CT_CONST_J12) && ~val >= -0x800 && ~val <= 0x7ff) {
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return 1;
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}
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return 0;
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}
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/*
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* RISC-V Base ISA opcodes (IM)
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*/
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typedef enum {
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OPC_ADD = 0x33,
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OPC_ADDI = 0x13,
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OPC_AND = 0x7033,
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OPC_ANDI = 0x7013,
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OPC_AUIPC = 0x17,
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OPC_BEQ = 0x63,
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OPC_BGE = 0x5063,
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OPC_BGEU = 0x7063,
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OPC_BLT = 0x4063,
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OPC_BLTU = 0x6063,
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OPC_BNE = 0x1063,
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OPC_DIV = 0x2004033,
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OPC_DIVU = 0x2005033,
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OPC_JAL = 0x6f,
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OPC_JALR = 0x67,
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OPC_LB = 0x3,
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OPC_LBU = 0x4003,
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OPC_LD = 0x3003,
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OPC_LH = 0x1003,
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OPC_LHU = 0x5003,
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OPC_LUI = 0x37,
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OPC_LW = 0x2003,
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OPC_LWU = 0x6003,
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OPC_MUL = 0x2000033,
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OPC_MULH = 0x2001033,
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OPC_MULHSU = 0x2002033,
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OPC_MULHU = 0x2003033,
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OPC_OR = 0x6033,
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OPC_ORI = 0x6013,
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OPC_REM = 0x2006033,
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OPC_REMU = 0x2007033,
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OPC_SB = 0x23,
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OPC_SD = 0x3023,
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OPC_SH = 0x1023,
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OPC_SLL = 0x1033,
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OPC_SLLI = 0x1013,
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OPC_SLT = 0x2033,
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OPC_SLTI = 0x2013,
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OPC_SLTIU = 0x3013,
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OPC_SLTU = 0x3033,
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OPC_SRA = 0x40005033,
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OPC_SRAI = 0x40005013,
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OPC_SRL = 0x5033,
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OPC_SRLI = 0x5013,
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OPC_SUB = 0x40000033,
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OPC_SW = 0x2023,
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OPC_XOR = 0x4033,
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OPC_XORI = 0x4013,
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OPC_ADDIW = 0x1b,
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OPC_ADDW = 0x3b,
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OPC_DIVUW = 0x200503b,
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OPC_DIVW = 0x200403b,
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OPC_MULW = 0x200003b,
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OPC_REMUW = 0x200703b,
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OPC_REMW = 0x200603b,
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OPC_SLLIW = 0x101b,
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OPC_SLLW = 0x103b,
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OPC_SRAIW = 0x4000501b,
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OPC_SRAW = 0x4000503b,
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OPC_SRLIW = 0x501b,
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OPC_SRLW = 0x503b,
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OPC_SUBW = 0x4000003b,
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OPC_FENCE = 0x0000000f,
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OPC_NOP = OPC_ADDI, /* nop = addi r0,r0,0 */
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/* Zba: Bit manipulation extension, address generation */
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OPC_ADD_UW = 0x0800003b,
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/* Zbb: Bit manipulation extension, basic bit manipulation */
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OPC_ANDN = 0x40007033,
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OPC_CLZ = 0x60001013,
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OPC_CLZW = 0x6000101b,
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OPC_CPOP = 0x60201013,
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OPC_CPOPW = 0x6020101b,
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OPC_CTZ = 0x60101013,
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OPC_CTZW = 0x6010101b,
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OPC_ORN = 0x40006033,
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OPC_REV8 = 0x6b805013,
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OPC_ROL = 0x60001033,
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OPC_ROLW = 0x6000103b,
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OPC_ROR = 0x60005033,
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OPC_RORW = 0x6000503b,
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OPC_RORI = 0x60005013,
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OPC_RORIW = 0x6000501b,
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OPC_SEXT_B = 0x60401013,
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OPC_SEXT_H = 0x60501013,
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OPC_XNOR = 0x40004033,
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OPC_ZEXT_H = 0x0800403b,
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/* Zicond: integer conditional operations */
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OPC_CZERO_EQZ = 0x0e005033,
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OPC_CZERO_NEZ = 0x0e007033,
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} RISCVInsn;
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/*
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* RISC-V immediate and instruction encoders (excludes 16-bit RVC)
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*/
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/* Type-R */
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static int32_t encode_r(RISCVInsn opc, TCGReg rd, TCGReg rs1, TCGReg rs2)
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{
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return opc | (rd & 0x1f) << 7 | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20;
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}
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/* Type-I */
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static int32_t encode_imm12(uint32_t imm)
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{
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return (imm & 0xfff) << 20;
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}
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static int32_t encode_i(RISCVInsn opc, TCGReg rd, TCGReg rs1, uint32_t imm)
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{
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return opc | (rd & 0x1f) << 7 | (rs1 & 0x1f) << 15 | encode_imm12(imm);
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}
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/* Type-S */
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static int32_t encode_simm12(uint32_t imm)
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{
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int32_t ret = 0;
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ret |= (imm & 0xFE0) << 20;
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ret |= (imm & 0x1F) << 7;
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return ret;
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}
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static int32_t encode_s(RISCVInsn opc, TCGReg rs1, TCGReg rs2, uint32_t imm)
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{
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return opc | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20 | encode_simm12(imm);
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}
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/* Type-SB */
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static int32_t encode_sbimm12(uint32_t imm)
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{
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int32_t ret = 0;
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ret |= (imm & 0x1000) << 19;
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ret |= (imm & 0x7e0) << 20;
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ret |= (imm & 0x1e) << 7;
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ret |= (imm & 0x800) >> 4;
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return ret;
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}
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static int32_t encode_sb(RISCVInsn opc, TCGReg rs1, TCGReg rs2, uint32_t imm)
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{
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return opc | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20 | encode_sbimm12(imm);
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}
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/* Type-U */
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static int32_t encode_uimm20(uint32_t imm)
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{
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return imm & 0xfffff000;
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}
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static int32_t encode_u(RISCVInsn opc, TCGReg rd, uint32_t imm)
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{
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return opc | (rd & 0x1f) << 7 | encode_uimm20(imm);
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}
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/* Type-UJ */
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static int32_t encode_ujimm20(uint32_t imm)
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{
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int32_t ret = 0;
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ret |= (imm & 0x0007fe) << (21 - 1);
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ret |= (imm & 0x000800) << (20 - 11);
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ret |= (imm & 0x0ff000) << (12 - 12);
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ret |= (imm & 0x100000) << (31 - 20);
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return ret;
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}
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static int32_t encode_uj(RISCVInsn opc, TCGReg rd, uint32_t imm)
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{
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return opc | (rd & 0x1f) << 7 | encode_ujimm20(imm);
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}
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/*
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* RISC-V instruction emitters
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*/
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static void tcg_out_opc_reg(TCGContext *s, RISCVInsn opc,
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TCGReg rd, TCGReg rs1, TCGReg rs2)
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{
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tcg_out32(s, encode_r(opc, rd, rs1, rs2));
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}
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static void tcg_out_opc_imm(TCGContext *s, RISCVInsn opc,
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TCGReg rd, TCGReg rs1, TCGArg imm)
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{
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tcg_out32(s, encode_i(opc, rd, rs1, imm));
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}
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static void tcg_out_opc_store(TCGContext *s, RISCVInsn opc,
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TCGReg rs1, TCGReg rs2, uint32_t imm)
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{
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tcg_out32(s, encode_s(opc, rs1, rs2, imm));
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}
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static void tcg_out_opc_branch(TCGContext *s, RISCVInsn opc,
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TCGReg rs1, TCGReg rs2, uint32_t imm)
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{
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tcg_out32(s, encode_sb(opc, rs1, rs2, imm));
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}
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static void tcg_out_opc_upper(TCGContext *s, RISCVInsn opc,
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TCGReg rd, uint32_t imm)
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{
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tcg_out32(s, encode_u(opc, rd, imm));
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}
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static void tcg_out_opc_jump(TCGContext *s, RISCVInsn opc,
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TCGReg rd, uint32_t imm)
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{
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tcg_out32(s, encode_uj(opc, rd, imm));
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}
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static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
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{
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int i;
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for (i = 0; i < count; ++i) {
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p[i] = OPC_NOP;
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}
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}
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/*
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* Relocations
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*/
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static bool reloc_sbimm12(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
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{
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const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
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intptr_t offset = (intptr_t)target - (intptr_t)src_rx;
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tcg_debug_assert((offset & 1) == 0);
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if (offset == sextreg(offset, 0, 12)) {
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*src_rw |= encode_sbimm12(offset);
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return true;
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}
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return false;
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}
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static bool reloc_jimm20(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
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{
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const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
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intptr_t offset = (intptr_t)target - (intptr_t)src_rx;
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tcg_debug_assert((offset & 1) == 0);
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if (offset == sextreg(offset, 0, 20)) {
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*src_rw |= encode_ujimm20(offset);
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return true;
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}
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return false;
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}
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static bool reloc_call(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
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{
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const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
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intptr_t offset = (intptr_t)target - (intptr_t)src_rx;
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int32_t lo = sextreg(offset, 0, 12);
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int32_t hi = offset - lo;
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if (offset == hi + lo) {
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src_rw[0] |= encode_uimm20(hi);
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src_rw[1] |= encode_imm12(lo);
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return true;
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}
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|
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return false;
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}
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|
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static bool patch_reloc(tcg_insn_unit *code_ptr, int type,
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intptr_t value, intptr_t addend)
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{
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tcg_debug_assert(addend == 0);
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switch (type) {
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case R_RISCV_BRANCH:
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return reloc_sbimm12(code_ptr, (tcg_insn_unit *)value);
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case R_RISCV_JAL:
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return reloc_jimm20(code_ptr, (tcg_insn_unit *)value);
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case R_RISCV_CALL:
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return reloc_call(code_ptr, (tcg_insn_unit *)value);
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default:
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g_assert_not_reached();
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}
|
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}
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|
|
|
/*
|
|
* TCG intrinsics
|
|
*/
|
|
|
|
static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg)
|
|
{
|
|
if (ret == arg) {
|
|
return true;
|
|
}
|
|
switch (type) {
|
|
case TCG_TYPE_I32:
|
|
case TCG_TYPE_I64:
|
|
tcg_out_opc_imm(s, OPC_ADDI, ret, arg, 0);
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd,
|
|
tcg_target_long val)
|
|
{
|
|
tcg_target_long lo, hi, tmp;
|
|
int shift, ret;
|
|
|
|
if (type == TCG_TYPE_I32) {
|
|
val = (int32_t)val;
|
|
}
|
|
|
|
lo = sextreg(val, 0, 12);
|
|
if (val == lo) {
|
|
tcg_out_opc_imm(s, OPC_ADDI, rd, TCG_REG_ZERO, lo);
|
|
return;
|
|
}
|
|
|
|
hi = val - lo;
|
|
if (val == (int32_t)val) {
|
|
tcg_out_opc_upper(s, OPC_LUI, rd, hi);
|
|
if (lo != 0) {
|
|
tcg_out_opc_imm(s, OPC_ADDIW, rd, rd, lo);
|
|
}
|
|
return;
|
|
}
|
|
|
|
tmp = tcg_pcrel_diff(s, (void *)val);
|
|
if (tmp == (int32_t)tmp) {
|
|
tcg_out_opc_upper(s, OPC_AUIPC, rd, 0);
|
|
tcg_out_opc_imm(s, OPC_ADDI, rd, rd, 0);
|
|
ret = reloc_call(s->code_ptr - 2, (const tcg_insn_unit *)val);
|
|
tcg_debug_assert(ret == true);
|
|
return;
|
|
}
|
|
|
|
/* Look for a single 20-bit section. */
|
|
shift = ctz64(val);
|
|
tmp = val >> shift;
|
|
if (tmp == sextreg(tmp, 0, 20)) {
|
|
tcg_out_opc_upper(s, OPC_LUI, rd, tmp << 12);
|
|
if (shift > 12) {
|
|
tcg_out_opc_imm(s, OPC_SLLI, rd, rd, shift - 12);
|
|
} else {
|
|
tcg_out_opc_imm(s, OPC_SRAI, rd, rd, 12 - shift);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Look for a few high zero bits, with lots of bits set in the middle. */
|
|
shift = clz64(val);
|
|
tmp = val << shift;
|
|
if (tmp == sextreg(tmp, 12, 20) << 12) {
|
|
tcg_out_opc_upper(s, OPC_LUI, rd, tmp);
|
|
tcg_out_opc_imm(s, OPC_SRLI, rd, rd, shift);
|
|
return;
|
|
} else if (tmp == sextreg(tmp, 0, 12)) {
|
|
tcg_out_opc_imm(s, OPC_ADDI, rd, TCG_REG_ZERO, tmp);
|
|
tcg_out_opc_imm(s, OPC_SRLI, rd, rd, shift);
|
|
return;
|
|
}
|
|
|
|
/* Drop into the constant pool. */
|
|
new_pool_label(s, val, R_RISCV_CALL, s->code_ptr, 0);
|
|
tcg_out_opc_upper(s, OPC_AUIPC, rd, 0);
|
|
tcg_out_opc_imm(s, OPC_LD, rd, rd, 0);
|
|
}
|
|
|
|
static bool tcg_out_xchg(TCGContext *s, TCGType type, TCGReg r1, TCGReg r2)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static void tcg_out_addi_ptr(TCGContext *s, TCGReg rd, TCGReg rs,
|
|
tcg_target_long imm)
|
|
{
|
|
/* This function is only used for passing structs by reference. */
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
static void tcg_out_ext8u(TCGContext *s, TCGReg ret, TCGReg arg)
|
|
{
|
|
tcg_out_opc_imm(s, OPC_ANDI, ret, arg, 0xff);
|
|
}
|
|
|
|
static void tcg_out_ext16u(TCGContext *s, TCGReg ret, TCGReg arg)
|
|
{
|
|
if (have_zbb) {
|
|
tcg_out_opc_reg(s, OPC_ZEXT_H, ret, arg, TCG_REG_ZERO);
|
|
} else {
|
|
tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 16);
|
|
tcg_out_opc_imm(s, OPC_SRLIW, ret, ret, 16);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_ext32u(TCGContext *s, TCGReg ret, TCGReg arg)
|
|
{
|
|
if (have_zba) {
|
|
tcg_out_opc_reg(s, OPC_ADD_UW, ret, arg, TCG_REG_ZERO);
|
|
} else {
|
|
tcg_out_opc_imm(s, OPC_SLLI, ret, arg, 32);
|
|
tcg_out_opc_imm(s, OPC_SRLI, ret, ret, 32);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_ext8s(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg)
|
|
{
|
|
if (have_zbb) {
|
|
tcg_out_opc_imm(s, OPC_SEXT_B, ret, arg, 0);
|
|
} else {
|
|
tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 24);
|
|
tcg_out_opc_imm(s, OPC_SRAIW, ret, ret, 24);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_ext16s(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg)
|
|
{
|
|
if (have_zbb) {
|
|
tcg_out_opc_imm(s, OPC_SEXT_H, ret, arg, 0);
|
|
} else {
|
|
tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 16);
|
|
tcg_out_opc_imm(s, OPC_SRAIW, ret, ret, 16);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_ext32s(TCGContext *s, TCGReg ret, TCGReg arg)
|
|
{
|
|
tcg_out_opc_imm(s, OPC_ADDIW, ret, arg, 0);
|
|
}
|
|
|
|
static void tcg_out_exts_i32_i64(TCGContext *s, TCGReg ret, TCGReg arg)
|
|
{
|
|
if (ret != arg) {
|
|
tcg_out_ext32s(s, ret, arg);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_extu_i32_i64(TCGContext *s, TCGReg ret, TCGReg arg)
|
|
{
|
|
tcg_out_ext32u(s, ret, arg);
|
|
}
|
|
|
|
static void tcg_out_extrl_i64_i32(TCGContext *s, TCGReg ret, TCGReg arg)
|
|
{
|
|
tcg_out_ext32s(s, ret, arg);
|
|
}
|
|
|
|
static void tcg_out_ldst(TCGContext *s, RISCVInsn opc, TCGReg data,
|
|
TCGReg addr, intptr_t offset)
|
|
{
|
|
intptr_t imm12 = sextreg(offset, 0, 12);
|
|
|
|
if (offset != imm12) {
|
|
intptr_t diff = tcg_pcrel_diff(s, (void *)offset);
|
|
|
|
if (addr == TCG_REG_ZERO && diff == (int32_t)diff) {
|
|
imm12 = sextreg(diff, 0, 12);
|
|
tcg_out_opc_upper(s, OPC_AUIPC, TCG_REG_TMP2, diff - imm12);
|
|
} else {
|
|
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP2, offset - imm12);
|
|
if (addr != TCG_REG_ZERO) {
|
|
tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP2, TCG_REG_TMP2, addr);
|
|
}
|
|
}
|
|
addr = TCG_REG_TMP2;
|
|
}
|
|
|
|
switch (opc) {
|
|
case OPC_SB:
|
|
case OPC_SH:
|
|
case OPC_SW:
|
|
case OPC_SD:
|
|
tcg_out_opc_store(s, opc, addr, data, imm12);
|
|
break;
|
|
case OPC_LB:
|
|
case OPC_LBU:
|
|
case OPC_LH:
|
|
case OPC_LHU:
|
|
case OPC_LW:
|
|
case OPC_LWU:
|
|
case OPC_LD:
|
|
tcg_out_opc_imm(s, opc, data, addr, imm12);
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg,
|
|
TCGReg arg1, intptr_t arg2)
|
|
{
|
|
RISCVInsn insn = type == TCG_TYPE_I32 ? OPC_LW : OPC_LD;
|
|
tcg_out_ldst(s, insn, arg, arg1, arg2);
|
|
}
|
|
|
|
static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg,
|
|
TCGReg arg1, intptr_t arg2)
|
|
{
|
|
RISCVInsn insn = type == TCG_TYPE_I32 ? OPC_SW : OPC_SD;
|
|
tcg_out_ldst(s, insn, arg, arg1, arg2);
|
|
}
|
|
|
|
static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val,
|
|
TCGReg base, intptr_t ofs)
|
|
{
|
|
if (val == 0) {
|
|
tcg_out_st(s, type, TCG_REG_ZERO, base, ofs);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static void tcg_out_addsub2(TCGContext *s,
|
|
TCGReg rl, TCGReg rh,
|
|
TCGReg al, TCGReg ah,
|
|
TCGArg bl, TCGArg bh,
|
|
bool cbl, bool cbh, bool is_sub, bool is32bit)
|
|
{
|
|
const RISCVInsn opc_add = is32bit ? OPC_ADDW : OPC_ADD;
|
|
const RISCVInsn opc_addi = is32bit ? OPC_ADDIW : OPC_ADDI;
|
|
const RISCVInsn opc_sub = is32bit ? OPC_SUBW : OPC_SUB;
|
|
TCGReg th = TCG_REG_TMP1;
|
|
|
|
/* If we have a negative constant such that negating it would
|
|
make the high part zero, we can (usually) eliminate one insn. */
|
|
if (cbl && cbh && bh == -1 && bl != 0) {
|
|
bl = -bl;
|
|
bh = 0;
|
|
is_sub = !is_sub;
|
|
}
|
|
|
|
/* By operating on the high part first, we get to use the final
|
|
carry operation to move back from the temporary. */
|
|
if (!cbh) {
|
|
tcg_out_opc_reg(s, (is_sub ? opc_sub : opc_add), th, ah, bh);
|
|
} else if (bh != 0 || ah == rl) {
|
|
tcg_out_opc_imm(s, opc_addi, th, ah, (is_sub ? -bh : bh));
|
|
} else {
|
|
th = ah;
|
|
}
|
|
|
|
/* Note that tcg optimization should eliminate the bl == 0 case. */
|
|
if (is_sub) {
|
|
if (cbl) {
|
|
tcg_out_opc_imm(s, OPC_SLTIU, TCG_REG_TMP0, al, bl);
|
|
tcg_out_opc_imm(s, opc_addi, rl, al, -bl);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_TMP0, al, bl);
|
|
tcg_out_opc_reg(s, opc_sub, rl, al, bl);
|
|
}
|
|
tcg_out_opc_reg(s, opc_sub, rh, th, TCG_REG_TMP0);
|
|
} else {
|
|
if (cbl) {
|
|
tcg_out_opc_imm(s, opc_addi, rl, al, bl);
|
|
tcg_out_opc_imm(s, OPC_SLTIU, TCG_REG_TMP0, rl, bl);
|
|
} else if (al == bl) {
|
|
/*
|
|
* If the input regs overlap, this is a simple doubling
|
|
* and carry-out is the input msb. This special case is
|
|
* required when the output reg overlaps the input,
|
|
* but we might as well use it always.
|
|
*/
|
|
tcg_out_opc_imm(s, OPC_SLTI, TCG_REG_TMP0, al, 0);
|
|
tcg_out_opc_reg(s, opc_add, rl, al, al);
|
|
} else {
|
|
tcg_out_opc_reg(s, opc_add, rl, al, bl);
|
|
tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_TMP0,
|
|
rl, (rl == bl ? al : bl));
|
|
}
|
|
tcg_out_opc_reg(s, opc_add, rh, th, TCG_REG_TMP0);
|
|
}
|
|
}
|
|
|
|
static const struct {
|
|
RISCVInsn op;
|
|
bool swap;
|
|
} tcg_brcond_to_riscv[] = {
|
|
[TCG_COND_EQ] = { OPC_BEQ, false },
|
|
[TCG_COND_NE] = { OPC_BNE, false },
|
|
[TCG_COND_LT] = { OPC_BLT, false },
|
|
[TCG_COND_GE] = { OPC_BGE, false },
|
|
[TCG_COND_LE] = { OPC_BGE, true },
|
|
[TCG_COND_GT] = { OPC_BLT, true },
|
|
[TCG_COND_LTU] = { OPC_BLTU, false },
|
|
[TCG_COND_GEU] = { OPC_BGEU, false },
|
|
[TCG_COND_LEU] = { OPC_BGEU, true },
|
|
[TCG_COND_GTU] = { OPC_BLTU, true }
|
|
};
|
|
|
|
static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1,
|
|
TCGReg arg2, TCGLabel *l)
|
|
{
|
|
RISCVInsn op = tcg_brcond_to_riscv[cond].op;
|
|
|
|
tcg_debug_assert(op != 0);
|
|
|
|
if (tcg_brcond_to_riscv[cond].swap) {
|
|
TCGReg t = arg1;
|
|
arg1 = arg2;
|
|
arg2 = t;
|
|
}
|
|
|
|
tcg_out_reloc(s, s->code_ptr, R_RISCV_BRANCH, l, 0);
|
|
tcg_out_opc_branch(s, op, arg1, arg2, 0);
|
|
}
|
|
|
|
#define SETCOND_INV TCG_TARGET_NB_REGS
|
|
#define SETCOND_NEZ (SETCOND_INV << 1)
|
|
#define SETCOND_FLAGS (SETCOND_INV | SETCOND_NEZ)
|
|
|
|
static int tcg_out_setcond_int(TCGContext *s, TCGCond cond, TCGReg ret,
|
|
TCGReg arg1, tcg_target_long arg2, bool c2)
|
|
{
|
|
int flags = 0;
|
|
|
|
switch (cond) {
|
|
case TCG_COND_EQ: /* -> NE */
|
|
case TCG_COND_GE: /* -> LT */
|
|
case TCG_COND_GEU: /* -> LTU */
|
|
case TCG_COND_GT: /* -> LE */
|
|
case TCG_COND_GTU: /* -> LEU */
|
|
cond = tcg_invert_cond(cond);
|
|
flags ^= SETCOND_INV;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
switch (cond) {
|
|
case TCG_COND_LE:
|
|
case TCG_COND_LEU:
|
|
/*
|
|
* If we have a constant input, the most efficient way to implement
|
|
* LE is by adding 1 and using LT. Watch out for wrap around for LEU.
|
|
* We don't need to care for this for LE because the constant input
|
|
* is constrained to signed 12-bit, and 0x800 is representable in the
|
|
* temporary register.
|
|
*/
|
|
if (c2) {
|
|
if (cond == TCG_COND_LEU) {
|
|
/* unsigned <= -1 is true */
|
|
if (arg2 == -1) {
|
|
tcg_out_movi(s, TCG_TYPE_REG, ret, !(flags & SETCOND_INV));
|
|
return ret;
|
|
}
|
|
cond = TCG_COND_LTU;
|
|
} else {
|
|
cond = TCG_COND_LT;
|
|
}
|
|
tcg_debug_assert(arg2 <= 0x7ff);
|
|
if (++arg2 == 0x800) {
|
|
tcg_out_movi(s, TCG_TYPE_REG, TCG_REG_TMP0, arg2);
|
|
arg2 = TCG_REG_TMP0;
|
|
c2 = false;
|
|
}
|
|
} else {
|
|
TCGReg tmp = arg2;
|
|
arg2 = arg1;
|
|
arg1 = tmp;
|
|
cond = tcg_swap_cond(cond); /* LE -> GE */
|
|
cond = tcg_invert_cond(cond); /* GE -> LT */
|
|
flags ^= SETCOND_INV;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
switch (cond) {
|
|
case TCG_COND_NE:
|
|
flags |= SETCOND_NEZ;
|
|
if (!c2) {
|
|
tcg_out_opc_reg(s, OPC_XOR, ret, arg1, arg2);
|
|
} else if (arg2 == 0) {
|
|
ret = arg1;
|
|
} else {
|
|
tcg_out_opc_imm(s, OPC_XORI, ret, arg1, arg2);
|
|
}
|
|
break;
|
|
|
|
case TCG_COND_LT:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_SLTI, ret, arg1, arg2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SLT, ret, arg1, arg2);
|
|
}
|
|
break;
|
|
|
|
case TCG_COND_LTU:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_SLTIU, ret, arg1, arg2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SLTU, ret, arg1, arg2);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
return ret | flags;
|
|
}
|
|
|
|
static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret,
|
|
TCGReg arg1, tcg_target_long arg2, bool c2)
|
|
{
|
|
int tmpflags = tcg_out_setcond_int(s, cond, ret, arg1, arg2, c2);
|
|
|
|
if (tmpflags != ret) {
|
|
TCGReg tmp = tmpflags & ~SETCOND_FLAGS;
|
|
|
|
switch (tmpflags & SETCOND_FLAGS) {
|
|
case SETCOND_INV:
|
|
/* Intermediate result is boolean: simply invert. */
|
|
tcg_out_opc_imm(s, OPC_XORI, ret, tmp, 1);
|
|
break;
|
|
case SETCOND_NEZ:
|
|
/* Intermediate result is zero/non-zero: test != 0. */
|
|
tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, tmp);
|
|
break;
|
|
case SETCOND_NEZ | SETCOND_INV:
|
|
/* Intermediate result is zero/non-zero: test == 0. */
|
|
tcg_out_opc_imm(s, OPC_SLTIU, ret, tmp, 1);
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
}
|
|
|
|
static void tcg_out_negsetcond(TCGContext *s, TCGCond cond, TCGReg ret,
|
|
TCGReg arg1, tcg_target_long arg2, bool c2)
|
|
{
|
|
int tmpflags;
|
|
TCGReg tmp;
|
|
|
|
/* For LT/GE comparison against 0, replicate the sign bit. */
|
|
if (c2 && arg2 == 0) {
|
|
switch (cond) {
|
|
case TCG_COND_GE:
|
|
tcg_out_opc_imm(s, OPC_XORI, ret, arg1, -1);
|
|
arg1 = ret;
|
|
/* fall through */
|
|
case TCG_COND_LT:
|
|
tcg_out_opc_imm(s, OPC_SRAI, ret, arg1, TCG_TARGET_REG_BITS - 1);
|
|
return;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
tmpflags = tcg_out_setcond_int(s, cond, ret, arg1, arg2, c2);
|
|
tmp = tmpflags & ~SETCOND_FLAGS;
|
|
|
|
/* If intermediate result is zero/non-zero: test != 0. */
|
|
if (tmpflags & SETCOND_NEZ) {
|
|
tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, tmp);
|
|
tmp = ret;
|
|
}
|
|
|
|
/* Produce the 0/-1 result. */
|
|
if (tmpflags & SETCOND_INV) {
|
|
tcg_out_opc_imm(s, OPC_ADDI, ret, tmp, -1);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SUB, ret, TCG_REG_ZERO, tmp);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_movcond_zicond(TCGContext *s, TCGReg ret, TCGReg test_ne,
|
|
int val1, bool c_val1,
|
|
int val2, bool c_val2)
|
|
{
|
|
if (val1 == 0) {
|
|
if (c_val2) {
|
|
tcg_out_movi(s, TCG_TYPE_REG, TCG_REG_TMP1, val2);
|
|
val2 = TCG_REG_TMP1;
|
|
}
|
|
tcg_out_opc_reg(s, OPC_CZERO_NEZ, ret, val2, test_ne);
|
|
return;
|
|
}
|
|
|
|
if (val2 == 0) {
|
|
if (c_val1) {
|
|
tcg_out_movi(s, TCG_TYPE_REG, TCG_REG_TMP1, val1);
|
|
val1 = TCG_REG_TMP1;
|
|
}
|
|
tcg_out_opc_reg(s, OPC_CZERO_EQZ, ret, val1, test_ne);
|
|
return;
|
|
}
|
|
|
|
if (c_val2) {
|
|
if (c_val1) {
|
|
tcg_out_movi(s, TCG_TYPE_REG, TCG_REG_TMP1, val1 - val2);
|
|
} else {
|
|
tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_TMP1, val1, -val2);
|
|
}
|
|
tcg_out_opc_reg(s, OPC_CZERO_EQZ, ret, TCG_REG_TMP1, test_ne);
|
|
tcg_out_opc_imm(s, OPC_ADDI, ret, ret, val2);
|
|
return;
|
|
}
|
|
|
|
if (c_val1) {
|
|
tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_TMP1, val2, -val1);
|
|
tcg_out_opc_reg(s, OPC_CZERO_NEZ, ret, TCG_REG_TMP1, test_ne);
|
|
tcg_out_opc_imm(s, OPC_ADDI, ret, ret, val1);
|
|
return;
|
|
}
|
|
|
|
tcg_out_opc_reg(s, OPC_CZERO_NEZ, TCG_REG_TMP1, val2, test_ne);
|
|
tcg_out_opc_reg(s, OPC_CZERO_EQZ, TCG_REG_TMP0, val1, test_ne);
|
|
tcg_out_opc_reg(s, OPC_OR, ret, TCG_REG_TMP0, TCG_REG_TMP1);
|
|
}
|
|
|
|
static void tcg_out_movcond_br1(TCGContext *s, TCGCond cond, TCGReg ret,
|
|
TCGReg cmp1, TCGReg cmp2,
|
|
int val, bool c_val)
|
|
{
|
|
RISCVInsn op;
|
|
int disp = 8;
|
|
|
|
tcg_debug_assert((unsigned)cond < ARRAY_SIZE(tcg_brcond_to_riscv));
|
|
op = tcg_brcond_to_riscv[cond].op;
|
|
tcg_debug_assert(op != 0);
|
|
|
|
if (tcg_brcond_to_riscv[cond].swap) {
|
|
tcg_out_opc_branch(s, op, cmp2, cmp1, disp);
|
|
} else {
|
|
tcg_out_opc_branch(s, op, cmp1, cmp2, disp);
|
|
}
|
|
if (c_val) {
|
|
tcg_out_opc_imm(s, OPC_ADDI, ret, TCG_REG_ZERO, val);
|
|
} else {
|
|
tcg_out_opc_imm(s, OPC_ADDI, ret, val, 0);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_movcond_br2(TCGContext *s, TCGCond cond, TCGReg ret,
|
|
TCGReg cmp1, TCGReg cmp2,
|
|
int val1, bool c_val1,
|
|
int val2, bool c_val2)
|
|
{
|
|
TCGReg tmp;
|
|
|
|
/* TCG optimizer reorders to prefer ret matching val2. */
|
|
if (!c_val2 && ret == val2) {
|
|
cond = tcg_invert_cond(cond);
|
|
tcg_out_movcond_br1(s, cond, ret, cmp1, cmp2, val1, c_val1);
|
|
return;
|
|
}
|
|
|
|
if (!c_val1 && ret == val1) {
|
|
tcg_out_movcond_br1(s, cond, ret, cmp1, cmp2, val2, c_val2);
|
|
return;
|
|
}
|
|
|
|
tmp = (ret == cmp1 || ret == cmp2 ? TCG_REG_TMP1 : ret);
|
|
if (c_val1) {
|
|
tcg_out_movi(s, TCG_TYPE_REG, tmp, val1);
|
|
} else {
|
|
tcg_out_mov(s, TCG_TYPE_REG, tmp, val1);
|
|
}
|
|
tcg_out_movcond_br1(s, cond, tmp, cmp1, cmp2, val2, c_val2);
|
|
tcg_out_mov(s, TCG_TYPE_REG, ret, tmp);
|
|
}
|
|
|
|
static void tcg_out_movcond(TCGContext *s, TCGCond cond, TCGReg ret,
|
|
TCGReg cmp1, int cmp2, bool c_cmp2,
|
|
TCGReg val1, bool c_val1,
|
|
TCGReg val2, bool c_val2)
|
|
{
|
|
int tmpflags;
|
|
TCGReg t;
|
|
|
|
if (!have_zicond && (!c_cmp2 || cmp2 == 0)) {
|
|
tcg_out_movcond_br2(s, cond, ret, cmp1, cmp2,
|
|
val1, c_val1, val2, c_val2);
|
|
return;
|
|
}
|
|
|
|
tmpflags = tcg_out_setcond_int(s, cond, TCG_REG_TMP0, cmp1, cmp2, c_cmp2);
|
|
t = tmpflags & ~SETCOND_FLAGS;
|
|
|
|
if (have_zicond) {
|
|
if (tmpflags & SETCOND_INV) {
|
|
tcg_out_movcond_zicond(s, ret, t, val2, c_val2, val1, c_val1);
|
|
} else {
|
|
tcg_out_movcond_zicond(s, ret, t, val1, c_val1, val2, c_val2);
|
|
}
|
|
} else {
|
|
cond = tmpflags & SETCOND_INV ? TCG_COND_EQ : TCG_COND_NE;
|
|
tcg_out_movcond_br2(s, cond, ret, t, TCG_REG_ZERO,
|
|
val1, c_val1, val2, c_val2);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_cltz(TCGContext *s, TCGType type, RISCVInsn insn,
|
|
TCGReg ret, TCGReg src1, int src2, bool c_src2)
|
|
{
|
|
tcg_out_opc_imm(s, insn, ret, src1, 0);
|
|
|
|
if (!c_src2 || src2 != (type == TCG_TYPE_I32 ? 32 : 64)) {
|
|
/*
|
|
* The requested zero result does not match the insn, so adjust.
|
|
* Note that constraints put 'ret' in a new register, so the
|
|
* computation above did not clobber either 'src1' or 'src2'.
|
|
*/
|
|
tcg_out_movcond(s, TCG_COND_EQ, ret, src1, 0, true,
|
|
src2, c_src2, ret, false);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_call_int(TCGContext *s, const tcg_insn_unit *arg, bool tail)
|
|
{
|
|
TCGReg link = tail ? TCG_REG_ZERO : TCG_REG_RA;
|
|
ptrdiff_t offset = tcg_pcrel_diff(s, arg);
|
|
int ret;
|
|
|
|
tcg_debug_assert((offset & 1) == 0);
|
|
if (offset == sextreg(offset, 0, 20)) {
|
|
/* short jump: -2097150 to 2097152 */
|
|
tcg_out_opc_jump(s, OPC_JAL, link, offset);
|
|
} else if (offset == (int32_t)offset) {
|
|
/* long jump: -2147483646 to 2147483648 */
|
|
tcg_out_opc_upper(s, OPC_AUIPC, TCG_REG_TMP0, 0);
|
|
tcg_out_opc_imm(s, OPC_JALR, link, TCG_REG_TMP0, 0);
|
|
ret = reloc_call(s->code_ptr - 2, arg);
|
|
tcg_debug_assert(ret == true);
|
|
} else {
|
|
/* far jump: 64-bit */
|
|
tcg_target_long imm = sextreg((tcg_target_long)arg, 0, 12);
|
|
tcg_target_long base = (tcg_target_long)arg - imm;
|
|
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP0, base);
|
|
tcg_out_opc_imm(s, OPC_JALR, link, TCG_REG_TMP0, imm);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_call(TCGContext *s, const tcg_insn_unit *arg,
|
|
const TCGHelperInfo *info)
|
|
{
|
|
tcg_out_call_int(s, arg, false);
|
|
}
|
|
|
|
static void tcg_out_mb(TCGContext *s, TCGArg a0)
|
|
{
|
|
tcg_insn_unit insn = OPC_FENCE;
|
|
|
|
if (a0 & TCG_MO_LD_LD) {
|
|
insn |= 0x02200000;
|
|
}
|
|
if (a0 & TCG_MO_ST_LD) {
|
|
insn |= 0x01200000;
|
|
}
|
|
if (a0 & TCG_MO_LD_ST) {
|
|
insn |= 0x02100000;
|
|
}
|
|
if (a0 & TCG_MO_ST_ST) {
|
|
insn |= 0x02200000;
|
|
}
|
|
tcg_out32(s, insn);
|
|
}
|
|
|
|
/*
|
|
* Load/store and TLB
|
|
*/
|
|
|
|
static void tcg_out_goto(TCGContext *s, const tcg_insn_unit *target)
|
|
{
|
|
tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, 0);
|
|
bool ok = reloc_jimm20(s->code_ptr - 1, target);
|
|
tcg_debug_assert(ok);
|
|
}
|
|
|
|
bool tcg_target_has_memory_bswap(MemOp memop)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/* We have three temps, we might as well expose them. */
|
|
static const TCGLdstHelperParam ldst_helper_param = {
|
|
.ntmp = 3, .tmp = { TCG_REG_TMP0, TCG_REG_TMP1, TCG_REG_TMP2 }
|
|
};
|
|
|
|
static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
|
|
{
|
|
MemOp opc = get_memop(l->oi);
|
|
|
|
/* resolve label address */
|
|
if (!reloc_sbimm12(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) {
|
|
return false;
|
|
}
|
|
|
|
/* call load helper */
|
|
tcg_out_ld_helper_args(s, l, &ldst_helper_param);
|
|
tcg_out_call_int(s, qemu_ld_helpers[opc & MO_SSIZE], false);
|
|
tcg_out_ld_helper_ret(s, l, true, &ldst_helper_param);
|
|
|
|
tcg_out_goto(s, l->raddr);
|
|
return true;
|
|
}
|
|
|
|
static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
|
|
{
|
|
MemOp opc = get_memop(l->oi);
|
|
|
|
/* resolve label address */
|
|
if (!reloc_sbimm12(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) {
|
|
return false;
|
|
}
|
|
|
|
/* call store helper */
|
|
tcg_out_st_helper_args(s, l, &ldst_helper_param);
|
|
tcg_out_call_int(s, qemu_st_helpers[opc & MO_SIZE], false);
|
|
|
|
tcg_out_goto(s, l->raddr);
|
|
return true;
|
|
}
|
|
|
|
/* We expect to use a 12-bit negative offset from ENV. */
|
|
#define MIN_TLB_MASK_TABLE_OFS -(1 << 11)
|
|
|
|
/*
|
|
* For system-mode, perform the TLB load and compare.
|
|
* For user-mode, perform any required alignment tests.
|
|
* In both cases, return a TCGLabelQemuLdst structure if the slow path
|
|
* is required and fill in @h with the host address for the fast path.
|
|
*/
|
|
static TCGLabelQemuLdst *prepare_host_addr(TCGContext *s, TCGReg *pbase,
|
|
TCGReg addr_reg, MemOpIdx oi,
|
|
bool is_ld)
|
|
{
|
|
TCGType addr_type = s->addr_type;
|
|
TCGLabelQemuLdst *ldst = NULL;
|
|
MemOp opc = get_memop(oi);
|
|
TCGAtomAlign aa;
|
|
unsigned a_mask;
|
|
|
|
aa = atom_and_align_for_opc(s, opc, MO_ATOM_IFALIGN, false);
|
|
a_mask = (1u << aa.align) - 1;
|
|
|
|
if (tcg_use_softmmu) {
|
|
unsigned s_bits = opc & MO_SIZE;
|
|
unsigned s_mask = (1u << s_bits) - 1;
|
|
int mem_index = get_mmuidx(oi);
|
|
int fast_ofs = tlb_mask_table_ofs(s, mem_index);
|
|
int mask_ofs = fast_ofs + offsetof(CPUTLBDescFast, mask);
|
|
int table_ofs = fast_ofs + offsetof(CPUTLBDescFast, table);
|
|
int compare_mask;
|
|
TCGReg addr_adj;
|
|
|
|
ldst = new_ldst_label(s);
|
|
ldst->is_ld = is_ld;
|
|
ldst->oi = oi;
|
|
ldst->addrlo_reg = addr_reg;
|
|
|
|
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_AREG0, mask_ofs);
|
|
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP1, TCG_AREG0, table_ofs);
|
|
|
|
tcg_out_opc_imm(s, OPC_SRLI, TCG_REG_TMP2, addr_reg,
|
|
s->page_bits - CPU_TLB_ENTRY_BITS);
|
|
tcg_out_opc_reg(s, OPC_AND, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP0);
|
|
tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP1);
|
|
|
|
/*
|
|
* For aligned accesses, we check the first byte and include the
|
|
* alignment bits within the address. For unaligned access, we
|
|
* check that we don't cross pages using the address of the last
|
|
* byte of the access.
|
|
*/
|
|
addr_adj = addr_reg;
|
|
if (a_mask < s_mask) {
|
|
addr_adj = TCG_REG_TMP0;
|
|
tcg_out_opc_imm(s, addr_type == TCG_TYPE_I32 ? OPC_ADDIW : OPC_ADDI,
|
|
addr_adj, addr_reg, s_mask - a_mask);
|
|
}
|
|
compare_mask = s->page_mask | a_mask;
|
|
if (compare_mask == sextreg(compare_mask, 0, 12)) {
|
|
tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_TMP1, addr_adj, compare_mask);
|
|
} else {
|
|
tcg_out_movi(s, addr_type, TCG_REG_TMP1, compare_mask);
|
|
tcg_out_opc_reg(s, OPC_AND, TCG_REG_TMP1, TCG_REG_TMP1, addr_adj);
|
|
}
|
|
|
|
/* Load the tlb comparator and the addend. */
|
|
QEMU_BUILD_BUG_ON(HOST_BIG_ENDIAN);
|
|
tcg_out_ld(s, addr_type, TCG_REG_TMP0, TCG_REG_TMP2,
|
|
is_ld ? offsetof(CPUTLBEntry, addr_read)
|
|
: offsetof(CPUTLBEntry, addr_write));
|
|
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP2, TCG_REG_TMP2,
|
|
offsetof(CPUTLBEntry, addend));
|
|
|
|
/* Compare masked address with the TLB entry. */
|
|
ldst->label_ptr[0] = s->code_ptr;
|
|
tcg_out_opc_branch(s, OPC_BNE, TCG_REG_TMP0, TCG_REG_TMP1, 0);
|
|
|
|
/* TLB Hit - translate address using addend. */
|
|
if (addr_type != TCG_TYPE_I32) {
|
|
tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP0, addr_reg, TCG_REG_TMP2);
|
|
} else if (have_zba) {
|
|
tcg_out_opc_reg(s, OPC_ADD_UW, TCG_REG_TMP0,
|
|
addr_reg, TCG_REG_TMP2);
|
|
} else {
|
|
tcg_out_ext32u(s, TCG_REG_TMP0, addr_reg);
|
|
tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP0,
|
|
TCG_REG_TMP0, TCG_REG_TMP2);
|
|
}
|
|
*pbase = TCG_REG_TMP0;
|
|
} else {
|
|
TCGReg base;
|
|
|
|
if (a_mask) {
|
|
ldst = new_ldst_label(s);
|
|
ldst->is_ld = is_ld;
|
|
ldst->oi = oi;
|
|
ldst->addrlo_reg = addr_reg;
|
|
|
|
/* We are expecting alignment max 7, so we can always use andi. */
|
|
tcg_debug_assert(a_mask == sextreg(a_mask, 0, 12));
|
|
tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_TMP1, addr_reg, a_mask);
|
|
|
|
ldst->label_ptr[0] = s->code_ptr;
|
|
tcg_out_opc_branch(s, OPC_BNE, TCG_REG_TMP1, TCG_REG_ZERO, 0);
|
|
}
|
|
|
|
if (guest_base != 0) {
|
|
base = TCG_REG_TMP0;
|
|
if (addr_type != TCG_TYPE_I32) {
|
|
tcg_out_opc_reg(s, OPC_ADD, base, addr_reg,
|
|
TCG_GUEST_BASE_REG);
|
|
} else if (have_zba) {
|
|
tcg_out_opc_reg(s, OPC_ADD_UW, base, addr_reg,
|
|
TCG_GUEST_BASE_REG);
|
|
} else {
|
|
tcg_out_ext32u(s, base, addr_reg);
|
|
tcg_out_opc_reg(s, OPC_ADD, base, base, TCG_GUEST_BASE_REG);
|
|
}
|
|
} else if (addr_type != TCG_TYPE_I32) {
|
|
base = addr_reg;
|
|
} else {
|
|
base = TCG_REG_TMP0;
|
|
tcg_out_ext32u(s, base, addr_reg);
|
|
}
|
|
*pbase = base;
|
|
}
|
|
|
|
return ldst;
|
|
}
|
|
|
|
static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg val,
|
|
TCGReg base, MemOp opc, TCGType type)
|
|
{
|
|
/* Byte swapping is left to middle-end expansion. */
|
|
tcg_debug_assert((opc & MO_BSWAP) == 0);
|
|
|
|
switch (opc & (MO_SSIZE)) {
|
|
case MO_UB:
|
|
tcg_out_opc_imm(s, OPC_LBU, val, base, 0);
|
|
break;
|
|
case MO_SB:
|
|
tcg_out_opc_imm(s, OPC_LB, val, base, 0);
|
|
break;
|
|
case MO_UW:
|
|
tcg_out_opc_imm(s, OPC_LHU, val, base, 0);
|
|
break;
|
|
case MO_SW:
|
|
tcg_out_opc_imm(s, OPC_LH, val, base, 0);
|
|
break;
|
|
case MO_UL:
|
|
if (type == TCG_TYPE_I64) {
|
|
tcg_out_opc_imm(s, OPC_LWU, val, base, 0);
|
|
break;
|
|
}
|
|
/* FALLTHRU */
|
|
case MO_SL:
|
|
tcg_out_opc_imm(s, OPC_LW, val, base, 0);
|
|
break;
|
|
case MO_UQ:
|
|
tcg_out_opc_imm(s, OPC_LD, val, base, 0);
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
static void tcg_out_qemu_ld(TCGContext *s, TCGReg data_reg, TCGReg addr_reg,
|
|
MemOpIdx oi, TCGType data_type)
|
|
{
|
|
TCGLabelQemuLdst *ldst;
|
|
TCGReg base;
|
|
|
|
ldst = prepare_host_addr(s, &base, addr_reg, oi, true);
|
|
tcg_out_qemu_ld_direct(s, data_reg, base, get_memop(oi), data_type);
|
|
|
|
if (ldst) {
|
|
ldst->type = data_type;
|
|
ldst->datalo_reg = data_reg;
|
|
ldst->raddr = tcg_splitwx_to_rx(s->code_ptr);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_qemu_st_direct(TCGContext *s, TCGReg val,
|
|
TCGReg base, MemOp opc)
|
|
{
|
|
/* Byte swapping is left to middle-end expansion. */
|
|
tcg_debug_assert((opc & MO_BSWAP) == 0);
|
|
|
|
switch (opc & (MO_SSIZE)) {
|
|
case MO_8:
|
|
tcg_out_opc_store(s, OPC_SB, base, val, 0);
|
|
break;
|
|
case MO_16:
|
|
tcg_out_opc_store(s, OPC_SH, base, val, 0);
|
|
break;
|
|
case MO_32:
|
|
tcg_out_opc_store(s, OPC_SW, base, val, 0);
|
|
break;
|
|
case MO_64:
|
|
tcg_out_opc_store(s, OPC_SD, base, val, 0);
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
static void tcg_out_qemu_st(TCGContext *s, TCGReg data_reg, TCGReg addr_reg,
|
|
MemOpIdx oi, TCGType data_type)
|
|
{
|
|
TCGLabelQemuLdst *ldst;
|
|
TCGReg base;
|
|
|
|
ldst = prepare_host_addr(s, &base, addr_reg, oi, false);
|
|
tcg_out_qemu_st_direct(s, data_reg, base, get_memop(oi));
|
|
|
|
if (ldst) {
|
|
ldst->type = data_type;
|
|
ldst->datalo_reg = data_reg;
|
|
ldst->raddr = tcg_splitwx_to_rx(s->code_ptr);
|
|
}
|
|
}
|
|
|
|
static const tcg_insn_unit *tb_ret_addr;
|
|
|
|
static void tcg_out_exit_tb(TCGContext *s, uintptr_t a0)
|
|
{
|
|
/* Reuse the zeroing that exists for goto_ptr. */
|
|
if (a0 == 0) {
|
|
tcg_out_call_int(s, tcg_code_gen_epilogue, true);
|
|
} else {
|
|
tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A0, a0);
|
|
tcg_out_call_int(s, tb_ret_addr, true);
|
|
}
|
|
}
|
|
|
|
static void tcg_out_goto_tb(TCGContext *s, int which)
|
|
{
|
|
/* Direct branch will be patched by tb_target_set_jmp_target. */
|
|
set_jmp_insn_offset(s, which);
|
|
tcg_out32(s, OPC_JAL);
|
|
|
|
/* When branch is out of range, fall through to indirect. */
|
|
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_REG_ZERO,
|
|
get_jmp_target_addr(s, which));
|
|
tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_TMP0, 0);
|
|
set_jmp_reset_offset(s, which);
|
|
}
|
|
|
|
void tb_target_set_jmp_target(const TranslationBlock *tb, int n,
|
|
uintptr_t jmp_rx, uintptr_t jmp_rw)
|
|
{
|
|
uintptr_t addr = tb->jmp_target_addr[n];
|
|
ptrdiff_t offset = addr - jmp_rx;
|
|
tcg_insn_unit insn;
|
|
|
|
/* Either directly branch, or fall through to indirect branch. */
|
|
if (offset == sextreg(offset, 0, 20)) {
|
|
insn = encode_uj(OPC_JAL, TCG_REG_ZERO, offset);
|
|
} else {
|
|
insn = OPC_NOP;
|
|
}
|
|
qatomic_set((uint32_t *)jmp_rw, insn);
|
|
flush_idcache_range(jmp_rx, jmp_rw, 4);
|
|
}
|
|
|
|
static void tcg_out_op(TCGContext *s, TCGOpcode opc,
|
|
const TCGArg args[TCG_MAX_OP_ARGS],
|
|
const int const_args[TCG_MAX_OP_ARGS])
|
|
{
|
|
TCGArg a0 = args[0];
|
|
TCGArg a1 = args[1];
|
|
TCGArg a2 = args[2];
|
|
int c2 = const_args[2];
|
|
|
|
switch (opc) {
|
|
case INDEX_op_goto_ptr:
|
|
tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, a0, 0);
|
|
break;
|
|
|
|
case INDEX_op_br:
|
|
tcg_out_reloc(s, s->code_ptr, R_RISCV_JAL, arg_label(a0), 0);
|
|
tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, 0);
|
|
break;
|
|
|
|
case INDEX_op_ld8u_i32:
|
|
case INDEX_op_ld8u_i64:
|
|
tcg_out_ldst(s, OPC_LBU, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_ld8s_i32:
|
|
case INDEX_op_ld8s_i64:
|
|
tcg_out_ldst(s, OPC_LB, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_ld16u_i32:
|
|
case INDEX_op_ld16u_i64:
|
|
tcg_out_ldst(s, OPC_LHU, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_ld16s_i32:
|
|
case INDEX_op_ld16s_i64:
|
|
tcg_out_ldst(s, OPC_LH, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_ld32u_i64:
|
|
tcg_out_ldst(s, OPC_LWU, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_ld_i32:
|
|
case INDEX_op_ld32s_i64:
|
|
tcg_out_ldst(s, OPC_LW, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_ld_i64:
|
|
tcg_out_ldst(s, OPC_LD, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_st8_i32:
|
|
case INDEX_op_st8_i64:
|
|
tcg_out_ldst(s, OPC_SB, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_st16_i32:
|
|
case INDEX_op_st16_i64:
|
|
tcg_out_ldst(s, OPC_SH, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_st_i32:
|
|
case INDEX_op_st32_i64:
|
|
tcg_out_ldst(s, OPC_SW, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_st_i64:
|
|
tcg_out_ldst(s, OPC_SD, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_add_i32:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_ADDIW, a0, a1, a2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_ADDW, a0, a1, a2);
|
|
}
|
|
break;
|
|
case INDEX_op_add_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_ADDI, a0, a1, a2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_ADD, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_sub_i32:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_ADDIW, a0, a1, -a2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SUBW, a0, a1, a2);
|
|
}
|
|
break;
|
|
case INDEX_op_sub_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_ADDI, a0, a1, -a2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SUB, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_and_i32:
|
|
case INDEX_op_and_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_ANDI, a0, a1, a2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_AND, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_or_i32:
|
|
case INDEX_op_or_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_ORI, a0, a1, a2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_OR, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_xor_i32:
|
|
case INDEX_op_xor_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_XORI, a0, a1, a2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_XOR, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_andc_i32:
|
|
case INDEX_op_andc_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_ANDI, a0, a1, ~a2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_ANDN, a0, a1, a2);
|
|
}
|
|
break;
|
|
case INDEX_op_orc_i32:
|
|
case INDEX_op_orc_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_ORI, a0, a1, ~a2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_ORN, a0, a1, a2);
|
|
}
|
|
break;
|
|
case INDEX_op_eqv_i32:
|
|
case INDEX_op_eqv_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_XORI, a0, a1, ~a2);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_XNOR, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_not_i32:
|
|
case INDEX_op_not_i64:
|
|
tcg_out_opc_imm(s, OPC_XORI, a0, a1, -1);
|
|
break;
|
|
|
|
case INDEX_op_neg_i32:
|
|
tcg_out_opc_reg(s, OPC_SUBW, a0, TCG_REG_ZERO, a1);
|
|
break;
|
|
case INDEX_op_neg_i64:
|
|
tcg_out_opc_reg(s, OPC_SUB, a0, TCG_REG_ZERO, a1);
|
|
break;
|
|
|
|
case INDEX_op_mul_i32:
|
|
tcg_out_opc_reg(s, OPC_MULW, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_mul_i64:
|
|
tcg_out_opc_reg(s, OPC_MUL, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_div_i32:
|
|
tcg_out_opc_reg(s, OPC_DIVW, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_div_i64:
|
|
tcg_out_opc_reg(s, OPC_DIV, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_divu_i32:
|
|
tcg_out_opc_reg(s, OPC_DIVUW, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_divu_i64:
|
|
tcg_out_opc_reg(s, OPC_DIVU, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_rem_i32:
|
|
tcg_out_opc_reg(s, OPC_REMW, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_rem_i64:
|
|
tcg_out_opc_reg(s, OPC_REM, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_remu_i32:
|
|
tcg_out_opc_reg(s, OPC_REMUW, a0, a1, a2);
|
|
break;
|
|
case INDEX_op_remu_i64:
|
|
tcg_out_opc_reg(s, OPC_REMU, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_shl_i32:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_SLLIW, a0, a1, a2 & 0x1f);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SLLW, a0, a1, a2);
|
|
}
|
|
break;
|
|
case INDEX_op_shl_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_SLLI, a0, a1, a2 & 0x3f);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SLL, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_shr_i32:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_SRLIW, a0, a1, a2 & 0x1f);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SRLW, a0, a1, a2);
|
|
}
|
|
break;
|
|
case INDEX_op_shr_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_SRLI, a0, a1, a2 & 0x3f);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SRL, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_sar_i32:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_SRAIW, a0, a1, a2 & 0x1f);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SRAW, a0, a1, a2);
|
|
}
|
|
break;
|
|
case INDEX_op_sar_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_SRAI, a0, a1, a2 & 0x3f);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_SRA, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_rotl_i32:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_RORIW, a0, a1, -a2 & 0x1f);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_ROLW, a0, a1, a2);
|
|
}
|
|
break;
|
|
case INDEX_op_rotl_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_RORI, a0, a1, -a2 & 0x3f);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_ROL, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_rotr_i32:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_RORIW, a0, a1, a2 & 0x1f);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_RORW, a0, a1, a2);
|
|
}
|
|
break;
|
|
case INDEX_op_rotr_i64:
|
|
if (c2) {
|
|
tcg_out_opc_imm(s, OPC_RORI, a0, a1, a2 & 0x3f);
|
|
} else {
|
|
tcg_out_opc_reg(s, OPC_ROR, a0, a1, a2);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_bswap64_i64:
|
|
tcg_out_opc_imm(s, OPC_REV8, a0, a1, 0);
|
|
break;
|
|
case INDEX_op_bswap32_i32:
|
|
a2 = 0;
|
|
/* fall through */
|
|
case INDEX_op_bswap32_i64:
|
|
tcg_out_opc_imm(s, OPC_REV8, a0, a1, 0);
|
|
if (a2 & TCG_BSWAP_OZ) {
|
|
tcg_out_opc_imm(s, OPC_SRLI, a0, a0, 32);
|
|
} else {
|
|
tcg_out_opc_imm(s, OPC_SRAI, a0, a0, 32);
|
|
}
|
|
break;
|
|
case INDEX_op_bswap16_i64:
|
|
case INDEX_op_bswap16_i32:
|
|
tcg_out_opc_imm(s, OPC_REV8, a0, a1, 0);
|
|
if (a2 & TCG_BSWAP_OZ) {
|
|
tcg_out_opc_imm(s, OPC_SRLI, a0, a0, 48);
|
|
} else {
|
|
tcg_out_opc_imm(s, OPC_SRAI, a0, a0, 48);
|
|
}
|
|
break;
|
|
|
|
case INDEX_op_ctpop_i32:
|
|
tcg_out_opc_imm(s, OPC_CPOPW, a0, a1, 0);
|
|
break;
|
|
case INDEX_op_ctpop_i64:
|
|
tcg_out_opc_imm(s, OPC_CPOP, a0, a1, 0);
|
|
break;
|
|
|
|
case INDEX_op_clz_i32:
|
|
tcg_out_cltz(s, TCG_TYPE_I32, OPC_CLZW, a0, a1, a2, c2);
|
|
break;
|
|
case INDEX_op_clz_i64:
|
|
tcg_out_cltz(s, TCG_TYPE_I64, OPC_CLZ, a0, a1, a2, c2);
|
|
break;
|
|
case INDEX_op_ctz_i32:
|
|
tcg_out_cltz(s, TCG_TYPE_I32, OPC_CTZW, a0, a1, a2, c2);
|
|
break;
|
|
case INDEX_op_ctz_i64:
|
|
tcg_out_cltz(s, TCG_TYPE_I64, OPC_CTZ, a0, a1, a2, c2);
|
|
break;
|
|
|
|
case INDEX_op_add2_i32:
|
|
tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
|
|
const_args[4], const_args[5], false, true);
|
|
break;
|
|
case INDEX_op_add2_i64:
|
|
tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
|
|
const_args[4], const_args[5], false, false);
|
|
break;
|
|
case INDEX_op_sub2_i32:
|
|
tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
|
|
const_args[4], const_args[5], true, true);
|
|
break;
|
|
case INDEX_op_sub2_i64:
|
|
tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5],
|
|
const_args[4], const_args[5], true, false);
|
|
break;
|
|
|
|
case INDEX_op_brcond_i32:
|
|
case INDEX_op_brcond_i64:
|
|
tcg_out_brcond(s, a2, a0, a1, arg_label(args[3]));
|
|
break;
|
|
|
|
case INDEX_op_setcond_i32:
|
|
case INDEX_op_setcond_i64:
|
|
tcg_out_setcond(s, args[3], a0, a1, a2, c2);
|
|
break;
|
|
|
|
case INDEX_op_negsetcond_i32:
|
|
case INDEX_op_negsetcond_i64:
|
|
tcg_out_negsetcond(s, args[3], a0, a1, a2, c2);
|
|
break;
|
|
|
|
case INDEX_op_movcond_i32:
|
|
case INDEX_op_movcond_i64:
|
|
tcg_out_movcond(s, args[5], a0, a1, a2, c2,
|
|
args[3], const_args[3], args[4], const_args[4]);
|
|
break;
|
|
|
|
case INDEX_op_qemu_ld_a32_i32:
|
|
case INDEX_op_qemu_ld_a64_i32:
|
|
tcg_out_qemu_ld(s, a0, a1, a2, TCG_TYPE_I32);
|
|
break;
|
|
case INDEX_op_qemu_ld_a32_i64:
|
|
case INDEX_op_qemu_ld_a64_i64:
|
|
tcg_out_qemu_ld(s, a0, a1, a2, TCG_TYPE_I64);
|
|
break;
|
|
case INDEX_op_qemu_st_a32_i32:
|
|
case INDEX_op_qemu_st_a64_i32:
|
|
tcg_out_qemu_st(s, a0, a1, a2, TCG_TYPE_I32);
|
|
break;
|
|
case INDEX_op_qemu_st_a32_i64:
|
|
case INDEX_op_qemu_st_a64_i64:
|
|
tcg_out_qemu_st(s, a0, a1, a2, TCG_TYPE_I64);
|
|
break;
|
|
|
|
case INDEX_op_extrh_i64_i32:
|
|
tcg_out_opc_imm(s, OPC_SRAI, a0, a1, 32);
|
|
break;
|
|
|
|
case INDEX_op_mulsh_i32:
|
|
case INDEX_op_mulsh_i64:
|
|
tcg_out_opc_reg(s, OPC_MULH, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_muluh_i32:
|
|
case INDEX_op_muluh_i64:
|
|
tcg_out_opc_reg(s, OPC_MULHU, a0, a1, a2);
|
|
break;
|
|
|
|
case INDEX_op_mb:
|
|
tcg_out_mb(s, a0);
|
|
break;
|
|
|
|
case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */
|
|
case INDEX_op_mov_i64:
|
|
case INDEX_op_call: /* Always emitted via tcg_out_call. */
|
|
case INDEX_op_exit_tb: /* Always emitted via tcg_out_exit_tb. */
|
|
case INDEX_op_goto_tb: /* Always emitted via tcg_out_goto_tb. */
|
|
case INDEX_op_ext8s_i32: /* Always emitted via tcg_reg_alloc_op. */
|
|
case INDEX_op_ext8s_i64:
|
|
case INDEX_op_ext8u_i32:
|
|
case INDEX_op_ext8u_i64:
|
|
case INDEX_op_ext16s_i32:
|
|
case INDEX_op_ext16s_i64:
|
|
case INDEX_op_ext16u_i32:
|
|
case INDEX_op_ext16u_i64:
|
|
case INDEX_op_ext32s_i64:
|
|
case INDEX_op_ext32u_i64:
|
|
case INDEX_op_ext_i32_i64:
|
|
case INDEX_op_extu_i32_i64:
|
|
case INDEX_op_extrl_i64_i32:
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op)
|
|
{
|
|
switch (op) {
|
|
case INDEX_op_goto_ptr:
|
|
return C_O0_I1(r);
|
|
|
|
case INDEX_op_ld8u_i32:
|
|
case INDEX_op_ld8s_i32:
|
|
case INDEX_op_ld16u_i32:
|
|
case INDEX_op_ld16s_i32:
|
|
case INDEX_op_ld_i32:
|
|
case INDEX_op_not_i32:
|
|
case INDEX_op_neg_i32:
|
|
case INDEX_op_ld8u_i64:
|
|
case INDEX_op_ld8s_i64:
|
|
case INDEX_op_ld16u_i64:
|
|
case INDEX_op_ld16s_i64:
|
|
case INDEX_op_ld32s_i64:
|
|
case INDEX_op_ld32u_i64:
|
|
case INDEX_op_ld_i64:
|
|
case INDEX_op_not_i64:
|
|
case INDEX_op_neg_i64:
|
|
case INDEX_op_ext8u_i32:
|
|
case INDEX_op_ext8u_i64:
|
|
case INDEX_op_ext16u_i32:
|
|
case INDEX_op_ext16u_i64:
|
|
case INDEX_op_ext32u_i64:
|
|
case INDEX_op_extu_i32_i64:
|
|
case INDEX_op_ext8s_i32:
|
|
case INDEX_op_ext8s_i64:
|
|
case INDEX_op_ext16s_i32:
|
|
case INDEX_op_ext16s_i64:
|
|
case INDEX_op_ext32s_i64:
|
|
case INDEX_op_extrl_i64_i32:
|
|
case INDEX_op_extrh_i64_i32:
|
|
case INDEX_op_ext_i32_i64:
|
|
case INDEX_op_bswap16_i32:
|
|
case INDEX_op_bswap32_i32:
|
|
case INDEX_op_bswap16_i64:
|
|
case INDEX_op_bswap32_i64:
|
|
case INDEX_op_bswap64_i64:
|
|
case INDEX_op_ctpop_i32:
|
|
case INDEX_op_ctpop_i64:
|
|
return C_O1_I1(r, r);
|
|
|
|
case INDEX_op_st8_i32:
|
|
case INDEX_op_st16_i32:
|
|
case INDEX_op_st_i32:
|
|
case INDEX_op_st8_i64:
|
|
case INDEX_op_st16_i64:
|
|
case INDEX_op_st32_i64:
|
|
case INDEX_op_st_i64:
|
|
return C_O0_I2(rZ, r);
|
|
|
|
case INDEX_op_add_i32:
|
|
case INDEX_op_and_i32:
|
|
case INDEX_op_or_i32:
|
|
case INDEX_op_xor_i32:
|
|
case INDEX_op_add_i64:
|
|
case INDEX_op_and_i64:
|
|
case INDEX_op_or_i64:
|
|
case INDEX_op_xor_i64:
|
|
case INDEX_op_setcond_i32:
|
|
case INDEX_op_setcond_i64:
|
|
case INDEX_op_negsetcond_i32:
|
|
case INDEX_op_negsetcond_i64:
|
|
return C_O1_I2(r, r, rI);
|
|
|
|
case INDEX_op_andc_i32:
|
|
case INDEX_op_andc_i64:
|
|
case INDEX_op_orc_i32:
|
|
case INDEX_op_orc_i64:
|
|
case INDEX_op_eqv_i32:
|
|
case INDEX_op_eqv_i64:
|
|
return C_O1_I2(r, r, rJ);
|
|
|
|
case INDEX_op_sub_i32:
|
|
case INDEX_op_sub_i64:
|
|
return C_O1_I2(r, rZ, rN);
|
|
|
|
case INDEX_op_mul_i32:
|
|
case INDEX_op_mulsh_i32:
|
|
case INDEX_op_muluh_i32:
|
|
case INDEX_op_div_i32:
|
|
case INDEX_op_divu_i32:
|
|
case INDEX_op_rem_i32:
|
|
case INDEX_op_remu_i32:
|
|
case INDEX_op_mul_i64:
|
|
case INDEX_op_mulsh_i64:
|
|
case INDEX_op_muluh_i64:
|
|
case INDEX_op_div_i64:
|
|
case INDEX_op_divu_i64:
|
|
case INDEX_op_rem_i64:
|
|
case INDEX_op_remu_i64:
|
|
return C_O1_I2(r, rZ, rZ);
|
|
|
|
case INDEX_op_shl_i32:
|
|
case INDEX_op_shr_i32:
|
|
case INDEX_op_sar_i32:
|
|
case INDEX_op_rotl_i32:
|
|
case INDEX_op_rotr_i32:
|
|
case INDEX_op_shl_i64:
|
|
case INDEX_op_shr_i64:
|
|
case INDEX_op_sar_i64:
|
|
case INDEX_op_rotl_i64:
|
|
case INDEX_op_rotr_i64:
|
|
return C_O1_I2(r, r, ri);
|
|
|
|
case INDEX_op_clz_i32:
|
|
case INDEX_op_clz_i64:
|
|
case INDEX_op_ctz_i32:
|
|
case INDEX_op_ctz_i64:
|
|
return C_N1_I2(r, r, rM);
|
|
|
|
case INDEX_op_brcond_i32:
|
|
case INDEX_op_brcond_i64:
|
|
return C_O0_I2(rZ, rZ);
|
|
|
|
case INDEX_op_movcond_i32:
|
|
case INDEX_op_movcond_i64:
|
|
return C_O1_I4(r, r, rI, rM, rM);
|
|
|
|
case INDEX_op_add2_i32:
|
|
case INDEX_op_add2_i64:
|
|
case INDEX_op_sub2_i32:
|
|
case INDEX_op_sub2_i64:
|
|
return C_O2_I4(r, r, rZ, rZ, rM, rM);
|
|
|
|
case INDEX_op_qemu_ld_a32_i32:
|
|
case INDEX_op_qemu_ld_a64_i32:
|
|
case INDEX_op_qemu_ld_a32_i64:
|
|
case INDEX_op_qemu_ld_a64_i64:
|
|
return C_O1_I1(r, r);
|
|
case INDEX_op_qemu_st_a32_i32:
|
|
case INDEX_op_qemu_st_a64_i32:
|
|
case INDEX_op_qemu_st_a32_i64:
|
|
case INDEX_op_qemu_st_a64_i64:
|
|
return C_O0_I2(rZ, r);
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
static const int tcg_target_callee_save_regs[] = {
|
|
TCG_REG_S0, /* used for the global env (TCG_AREG0) */
|
|
TCG_REG_S1,
|
|
TCG_REG_S2,
|
|
TCG_REG_S3,
|
|
TCG_REG_S4,
|
|
TCG_REG_S5,
|
|
TCG_REG_S6,
|
|
TCG_REG_S7,
|
|
TCG_REG_S8,
|
|
TCG_REG_S9,
|
|
TCG_REG_S10,
|
|
TCG_REG_S11,
|
|
TCG_REG_RA, /* should be last for ABI compliance */
|
|
};
|
|
|
|
/* Stack frame parameters. */
|
|
#define REG_SIZE (TCG_TARGET_REG_BITS / 8)
|
|
#define SAVE_SIZE ((int)ARRAY_SIZE(tcg_target_callee_save_regs) * REG_SIZE)
|
|
#define TEMP_SIZE (CPU_TEMP_BUF_NLONGS * (int)sizeof(long))
|
|
#define FRAME_SIZE ((TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE + SAVE_SIZE \
|
|
+ TCG_TARGET_STACK_ALIGN - 1) \
|
|
& -TCG_TARGET_STACK_ALIGN)
|
|
#define SAVE_OFS (TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE)
|
|
|
|
/* We're expecting to be able to use an immediate for frame allocation. */
|
|
QEMU_BUILD_BUG_ON(FRAME_SIZE > 0x7ff);
|
|
|
|
/* Generate global QEMU prologue and epilogue code */
|
|
static void tcg_target_qemu_prologue(TCGContext *s)
|
|
{
|
|
int i;
|
|
|
|
tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE, TEMP_SIZE);
|
|
|
|
/* TB prologue */
|
|
tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_SP, TCG_REG_SP, -FRAME_SIZE);
|
|
for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
|
|
tcg_out_st(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i],
|
|
TCG_REG_SP, SAVE_OFS + i * REG_SIZE);
|
|
}
|
|
|
|
if (!tcg_use_softmmu && guest_base) {
|
|
tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
|
|
}
|
|
|
|
/* Call generated code */
|
|
tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]);
|
|
tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, tcg_target_call_iarg_regs[1], 0);
|
|
|
|
/* Return path for goto_ptr. Set return value to 0 */
|
|
tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr);
|
|
tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_A0, TCG_REG_ZERO);
|
|
|
|
/* TB epilogue */
|
|
tb_ret_addr = tcg_splitwx_to_rx(s->code_ptr);
|
|
for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
|
|
tcg_out_ld(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i],
|
|
TCG_REG_SP, SAVE_OFS + i * REG_SIZE);
|
|
}
|
|
|
|
tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_SP, TCG_REG_SP, FRAME_SIZE);
|
|
tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_RA, 0);
|
|
}
|
|
|
|
static void tcg_out_tb_start(TCGContext *s)
|
|
{
|
|
/* nothing to do */
|
|
}
|
|
|
|
static volatile sig_atomic_t got_sigill;
|
|
|
|
static void sigill_handler(int signo, siginfo_t *si, void *data)
|
|
{
|
|
/* Skip the faulty instruction */
|
|
ucontext_t *uc = (ucontext_t *)data;
|
|
uc->uc_mcontext.__gregs[REG_PC] += 4;
|
|
|
|
got_sigill = 1;
|
|
}
|
|
|
|
static void tcg_target_detect_isa(void)
|
|
{
|
|
#if !defined(have_zba) || !defined(have_zbb) || !defined(have_zicond)
|
|
/*
|
|
* TODO: It is expected that this will be determinable via
|
|
* linux riscv_hwprobe syscall, not yet merged.
|
|
* In the meantime, test via sigill.
|
|
*/
|
|
|
|
struct sigaction sa_old, sa_new;
|
|
|
|
memset(&sa_new, 0, sizeof(sa_new));
|
|
sa_new.sa_flags = SA_SIGINFO;
|
|
sa_new.sa_sigaction = sigill_handler;
|
|
sigaction(SIGILL, &sa_new, &sa_old);
|
|
|
|
#ifndef have_zba
|
|
/* Probe for Zba: add.uw zero,zero,zero. */
|
|
got_sigill = 0;
|
|
asm volatile(".insn r 0x3b, 0, 0x04, zero, zero, zero" : : : "memory");
|
|
have_zba = !got_sigill;
|
|
#endif
|
|
|
|
#ifndef have_zbb
|
|
/* Probe for Zba: andn zero,zero,zero. */
|
|
got_sigill = 0;
|
|
asm volatile(".insn r 0x33, 7, 0x20, zero, zero, zero" : : : "memory");
|
|
have_zbb = !got_sigill;
|
|
#endif
|
|
|
|
#ifndef have_zicond
|
|
/* Probe for Zicond: czero.eqz zero,zero,zero. */
|
|
got_sigill = 0;
|
|
asm volatile(".insn r 0x33, 5, 0x07, zero, zero, zero" : : : "memory");
|
|
have_zicond = !got_sigill;
|
|
#endif
|
|
|
|
sigaction(SIGILL, &sa_old, NULL);
|
|
#endif
|
|
}
|
|
|
|
static void tcg_target_init(TCGContext *s)
|
|
{
|
|
tcg_target_detect_isa();
|
|
|
|
tcg_target_available_regs[TCG_TYPE_I32] = 0xffffffff;
|
|
tcg_target_available_regs[TCG_TYPE_I64] = 0xffffffff;
|
|
|
|
tcg_target_call_clobber_regs = -1u;
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S0);
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S1);
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S2);
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S3);
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S4);
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S5);
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S6);
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S7);
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S8);
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S9);
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S10);
|
|
tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S11);
|
|
|
|
s->reserved_regs = 0;
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP0);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP1);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP2);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_GP);
|
|
tcg_regset_set_reg(s->reserved_regs, TCG_REG_TP);
|
|
}
|
|
|
|
typedef struct {
|
|
DebugFrameHeader h;
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uint8_t fde_def_cfa[4];
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uint8_t fde_reg_ofs[ARRAY_SIZE(tcg_target_callee_save_regs) * 2];
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} DebugFrame;
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|
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#define ELF_HOST_MACHINE EM_RISCV
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|
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static const DebugFrame debug_frame = {
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.h.cie.len = sizeof(DebugFrameCIE) - 4, /* length after .len member */
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.h.cie.id = -1,
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.h.cie.version = 1,
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.h.cie.code_align = 1,
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.h.cie.data_align = -(TCG_TARGET_REG_BITS / 8) & 0x7f, /* sleb128 */
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.h.cie.return_column = TCG_REG_RA,
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|
|
|
/* Total FDE size does not include the "len" member. */
|
|
.h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset),
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|
|
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.fde_def_cfa = {
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12, TCG_REG_SP, /* DW_CFA_def_cfa sp, ... */
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(FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */
|
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(FRAME_SIZE >> 7)
|
|
},
|
|
.fde_reg_ofs = {
|
|
0x80 + 9, 12, /* DW_CFA_offset, s1, -96 */
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|
0x80 + 18, 11, /* DW_CFA_offset, s2, -88 */
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|
0x80 + 19, 10, /* DW_CFA_offset, s3, -80 */
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|
0x80 + 20, 9, /* DW_CFA_offset, s4, -72 */
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|
0x80 + 21, 8, /* DW_CFA_offset, s5, -64 */
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|
0x80 + 22, 7, /* DW_CFA_offset, s6, -56 */
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|
0x80 + 23, 6, /* DW_CFA_offset, s7, -48 */
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|
0x80 + 24, 5, /* DW_CFA_offset, s8, -40 */
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|
0x80 + 25, 4, /* DW_CFA_offset, s9, -32 */
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|
0x80 + 26, 3, /* DW_CFA_offset, s10, -24 */
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|
0x80 + 27, 2, /* DW_CFA_offset, s11, -16 */
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|
0x80 + 1 , 1, /* DW_CFA_offset, ra, -8 */
|
|
}
|
|
};
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|
|
|
void tcg_register_jit(const void *buf, size_t buf_size)
|
|
{
|
|
tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame));
|
|
}
|