151 lines
4.2 KiB
LLVM
151 lines
4.2 KiB
LLVM
; RUN: llc < %s -march=nvptx -mcpu=sm_20 -nvptx-prec-divf32=0 -nvptx-prec-sqrtf32=0 \
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; RUN: | FileCheck %s
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v16:16:16-v32:32:32-v64:64:64-v128:128:128-n16:32:64"
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declare float @llvm.sqrt.f32(float)
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declare double @llvm.sqrt.f64(double)
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; -- reciprocal sqrt --
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; CHECK-LABEL test_rsqrt32
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define float @test_rsqrt32(float %a) #0 {
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; CHECK: rsqrt.approx.f32
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%val = tail call float @llvm.sqrt.f32(float %a)
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%ret = fdiv float 1.0, %val
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ret float %ret
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}
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; CHECK-LABEL test_rsqrt_ftz
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define float @test_rsqrt_ftz(float %a) #0 #1 {
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; CHECK: rsqrt.approx.ftz.f32
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%val = tail call float @llvm.sqrt.f32(float %a)
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%ret = fdiv float 1.0, %val
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ret float %ret
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}
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; CHECK-LABEL test_rsqrt64
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define double @test_rsqrt64(double %a) #0 {
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; CHECK: rsqrt.approx.f64
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%val = tail call double @llvm.sqrt.f64(double %a)
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%ret = fdiv double 1.0, %val
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ret double %ret
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}
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; CHECK-LABEL test_rsqrt64_ftz
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define double @test_rsqrt64_ftz(double %a) #0 #1 {
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; There's no rsqrt.approx.ftz.f64 instruction; we just use the non-ftz version.
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; CHECK: rsqrt.approx.f64
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%val = tail call double @llvm.sqrt.f64(double %a)
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%ret = fdiv double 1.0, %val
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ret double %ret
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}
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; -- sqrt --
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; CHECK-LABEL test_sqrt32
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define float @test_sqrt32(float %a) #0 {
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; CHECK: sqrt.approx.f32
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%ret = tail call float @llvm.sqrt.f32(float %a)
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ret float %ret
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}
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; CHECK-LABEL test_sqrt_ftz
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define float @test_sqrt_ftz(float %a) #0 #1 {
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; CHECK: sqrt.approx.ftz.f32
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%ret = tail call float @llvm.sqrt.f32(float %a)
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ret float %ret
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}
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; CHECK-LABEL test_sqrt64
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define double @test_sqrt64(double %a) #0 {
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; There's no sqrt.approx.f64 instruction; we emit
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; reciprocal(rsqrt.approx.f64(x)). There's no non-ftz approximate reciprocal,
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; so we just use the ftz version.
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; CHECK: rsqrt.approx.f64
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; CHECK: rcp.approx.ftz.f64
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%ret = tail call double @llvm.sqrt.f64(double %a)
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ret double %ret
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}
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; CHECK-LABEL test_sqrt64_ftz
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define double @test_sqrt64_ftz(double %a) #0 #1 {
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; There's no sqrt.approx.ftz.f64 instruction; we just use the non-ftz version.
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; CHECK: rsqrt.approx.f64
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; CHECK: rcp.approx.ftz.f64
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%ret = tail call double @llvm.sqrt.f64(double %a)
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ret double %ret
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}
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; -- refined sqrt and rsqrt --
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;
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; The sqrt and rsqrt refinement algorithms both emit an rsqrt.approx, followed
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; by some math.
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; CHECK-LABEL: test_rsqrt32_refined
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define float @test_rsqrt32_refined(float %a) #0 #2 {
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; CHECK: rsqrt.approx.f32
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%val = tail call float @llvm.sqrt.f32(float %a)
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%ret = fdiv float 1.0, %val
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ret float %ret
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}
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; CHECK-LABEL: test_sqrt32_refined
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define float @test_sqrt32_refined(float %a) #0 #2 {
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; CHECK: rsqrt.approx.f32
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%ret = tail call float @llvm.sqrt.f32(float %a)
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ret float %ret
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}
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; CHECK-LABEL: test_rsqrt64_refined
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define double @test_rsqrt64_refined(double %a) #0 #2 {
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; CHECK: rsqrt.approx.f64
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%val = tail call double @llvm.sqrt.f64(double %a)
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%ret = fdiv double 1.0, %val
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ret double %ret
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}
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; CHECK-LABEL: test_sqrt64_refined
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define double @test_sqrt64_refined(double %a) #0 #2 {
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; CHECK: rsqrt.approx.f64
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%ret = tail call double @llvm.sqrt.f64(double %a)
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ret double %ret
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}
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; -- refined sqrt and rsqrt with ftz enabled --
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; CHECK-LABEL: test_rsqrt32_refined_ftz
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define float @test_rsqrt32_refined_ftz(float %a) #0 #1 #2 {
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; CHECK: rsqrt.approx.ftz.f32
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%val = tail call float @llvm.sqrt.f32(float %a)
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%ret = fdiv float 1.0, %val
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ret float %ret
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}
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; CHECK-LABEL: test_sqrt32_refined_ftz
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define float @test_sqrt32_refined_ftz(float %a) #0 #1 #2 {
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; CHECK: rsqrt.approx.ftz.f32
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%ret = tail call float @llvm.sqrt.f32(float %a)
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ret float %ret
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}
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; CHECK-LABEL: test_rsqrt64_refined_ftz
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define double @test_rsqrt64_refined_ftz(double %a) #0 #1 #2 {
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; There's no rsqrt.approx.ftz.f64, so we just use the non-ftz version.
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; CHECK: rsqrt.approx.f64
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%val = tail call double @llvm.sqrt.f64(double %a)
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%ret = fdiv double 1.0, %val
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ret double %ret
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}
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; CHECK-LABEL: test_sqrt64_refined_ftz
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define double @test_sqrt64_refined_ftz(double %a) #0 #1 #2 {
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; CHECK: rsqrt.approx.f64
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%ret = tail call double @llvm.sqrt.f64(double %a)
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ret double %ret
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}
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attributes #0 = { "unsafe-fp-math" = "true" }
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attributes #1 = { "nvptx-f32ftz" = "true" }
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attributes #2 = { "reciprocal-estimates" = "rsqrtf:1,rsqrtd:1,sqrtf:1,sqrtd:1" }
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