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If 2.5 ulp is acceptable, denormals are not required, and isn't a reciprocal which will already be handled, replace with a faster fdiv. Simplify the lowering tests by using per function subtarget features. llvm-svn: 276051
19 lines
583 B
LLVM
19 lines
583 B
LLVM
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck %s
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declare float @llvm.amdgcn.fdiv.fast(float, float) #0
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; CHECK-LABEL: {{^}}test_fdiv_fast:
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; CHECK: v_cndmask_b32_e32 v{{[0-9]+}}, 1.0, v{{[0-9]+}}, vcc
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; CHECK: v_mul_f32_e32
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; CHECK: v_rcp_f32_e32
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; CHECK: v_mul_f32_e32
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; CHECK: v_mul_f32_e32
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define void @test_fdiv_fast(float addrspace(1)* %out, float %a, float %b) #1 {
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%fdiv = call float @llvm.amdgcn.fdiv.fast(float %a, float %b)
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store float %fdiv, float addrspace(1)* %out
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ret void
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}
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attributes #0 = { nounwind readnone }
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attributes #1 = { nounwind }
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