69 lines
1.9 KiB
LLVM
69 lines
1.9 KiB
LLVM
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; RUN: llc < %s -mtriple=ve | FileCheck %s
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;;; Test ‘fneg’ Instruction
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;;;
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;;; Syntax:
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;;; <result> = fneg [fast-math flags]* <ty> <op1> ; yields ty:result
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;;;
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;;; Overview:
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;;; The ‘fneg’ instruction returns the negation of its operand.
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;;;
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;;; Arguments:
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;;; The argument to the ‘fneg’ instruction must be a floating-point or
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;;; vector of floating-point values.
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;;;
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;;; Semantics:
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;;;
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;;; The value produced is a copy of the operand with its sign bit flipped.
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;;; This instruction can also take any number of fast-math flags, which are
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;;; optimization hints to enable otherwise unsafe floating-point
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;;; optimizations.
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;;;
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;;; Example:
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;;; <result> = fneg float %val ; yields float:result = -%var
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;;;
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;;; Note:
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;;; We test only float/double/fp128.
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; Function Attrs: norecurse nounwind readnone
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define float @fneg_float(float %0) {
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; CHECK-LABEL: fneg_float:
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; CHECK: # %bb.0:
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; CHECK-NEXT: sra.l %s0, %s0, 32
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; CHECK-NEXT: lea %s1, -2147483648
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; CHECK-NEXT: and %s1, %s1, (32)0
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; CHECK-NEXT: xor %s0, %s0, %s1
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; CHECK-NEXT: sll %s0, %s0, 32
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; CHECK-NEXT: b.l.t (, %s10)
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%2 = fneg float %0
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ret float %2
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}
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; Function Attrs: norecurse nounwind readnone
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define double @fneg_double(double %0) {
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; CHECK-LABEL: fneg_double:
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; CHECK: # %bb.0:
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; CHECK-NEXT: xor %s0, %s0, (1)1
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; CHECK-NEXT: b.l.t (, %s10)
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%2 = fneg double %0
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ret double %2
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}
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; Function Attrs: norecurse nounwind readnone
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define fp128 @fneg_quad(fp128 %0) {
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; CHECK-LABEL: fneg_quad:
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; CHECK: .LBB{{[0-9]+}}_2:
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; CHECK-NEXT: st %s1, (, %s11)
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; CHECK-NEXT: st %s0, 8(, %s11)
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; CHECK-NEXT: ld1b.zx %s0, 15(, %s11)
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; CHECK-NEXT: lea %s1, 128
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; CHECK-NEXT: xor %s0, %s0, %s1
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; CHECK-NEXT: st1b %s0, 15(, %s11)
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; CHECK-NEXT: ld %s1, (, %s11)
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; CHECK-NEXT: ld %s0, 8(, %s11)
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; CHECK-NEXT: adds.l %s11, 16, %s11
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; CHECK-NEXT: b.l.t (, %s10)
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%2 = fneg fp128 %0
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ret fp128 %2
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}
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