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dab91bcc3a
This is a follow-on to r221706 and r221731 and discussed in more detail in PR21385. This patch also loosens the testcase checking for btver2. We know that the "1.0" will be loaded, but we can't tell exactly when, so replace the CHECK-NEXT specifiers with plain CHECKs. The CHECK-NEXT sequence relied on a quirk of post-RA-scheduling that may change independently of anything in these tests. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221819 91177308-0d34-0410-b5e6-96231b3b80d8
110 lines
2.6 KiB
LLVM
110 lines
2.6 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=core2 | FileCheck %s
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=btver2 | FileCheck %s --check-prefix=BTVER2
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+use-recip-est,+avx -x86-recip-refinement-steps=2 | FileCheck %s --check-prefix=REFINE
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; If the target's divss/divps instructions are substantially
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; slower than rcpss/rcpps with a Newton-Raphson refinement,
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; we should generate the estimate sequence.
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; See PR21385 ( http://llvm.org/bugs/show_bug.cgi?id=21385 )
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; for details about the accuracy, speed, and implementation
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; differences of x86 reciprocal estimates.
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define float @reciprocal_estimate(float %x) #0 {
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%div = fdiv fast float 1.0, %x
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ret float %div
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; CHECK-LABEL: reciprocal_estimate:
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; CHECK: movss
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; CHECK-NEXT: divss
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; CHECK-NEXT: movaps
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; CHECK-NEXT: retq
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; BTVER2-LABEL: reciprocal_estimate:
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; BTVER2: vrcpss
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; BTVER2: vmulss
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; BTVER2: vsubss
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; BTVER2: vmulss
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; BTVER2: vaddss
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; BTVER2-NEXT: retq
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; REFINE-LABEL: reciprocal_estimate:
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; REFINE: vrcpss
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; REFINE: vmulss
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; REFINE: vsubss
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; REFINE: vmulss
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; REFINE: vaddss
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; REFINE: vmulss
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; REFINE: vsubss
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; REFINE: vmulss
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; REFINE: vaddss
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; REFINE-NEXT: retq
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}
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define <4 x float> @reciprocal_estimate_v4f32(<4 x float> %x) #0 {
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%div = fdiv fast <4 x float> <float 1.0, float 1.0, float 1.0, float 1.0>, %x
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ret <4 x float> %div
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; CHECK-LABEL: reciprocal_estimate_v4f32:
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; CHECK: movaps
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; CHECK-NEXT: divps
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; CHECK-NEXT: movaps
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; CHECK-NEXT: retq
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; BTVER2-LABEL: reciprocal_estimate_v4f32:
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; BTVER2: vrcpps
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; BTVER2: vmulps
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; BTVER2: vsubps
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; BTVER2: vmulps
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; BTVER2: vaddps
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; BTVER2-NEXT: retq
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; REFINE-LABEL: reciprocal_estimate_v4f32:
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; REFINE: vrcpps
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; REFINE: vmulps
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; REFINE: vsubps
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; REFINE: vmulps
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; REFINE: vaddps
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; REFINE: vmulps
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; REFINE: vsubps
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; REFINE: vmulps
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; REFINE: vaddps
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; REFINE-NEXT: retq
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}
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define <8 x float> @reciprocal_estimate_v8f32(<8 x float> %x) #0 {
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%div = fdiv fast <8 x float> <float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0>, %x
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ret <8 x float> %div
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; CHECK-LABEL: reciprocal_estimate_v8f32:
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; CHECK: movaps
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; CHECK: movaps
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; CHECK-NEXT: divps
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; CHECK-NEXT: divps
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; CHECK-NEXT: movaps
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; CHECK-NEXT: movaps
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; CHECK-NEXT: retq
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; BTVER2-LABEL: reciprocal_estimate_v8f32:
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; BTVER2: vrcpps
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; BTVER2: vmulps
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; BTVER2: vsubps
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; BTVER2: vmulps
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; BTVER2: vaddps
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; BTVER2-NEXT: retq
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; REFINE-LABEL: reciprocal_estimate_v8f32:
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; REFINE: vrcpps
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; REFINE: vmulps
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; REFINE: vsubps
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; REFINE: vmulps
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; REFINE: vaddps
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; REFINE: vmulps
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; REFINE: vsubps
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; REFINE: vmulps
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; REFINE: vaddps
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; REFINE-NEXT: retq
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}
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attributes #0 = { "unsafe-fp-math"="true" }
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