derek.holloway
7502bf64a4
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29 lines
1.4 KiB
LLVM
29 lines
1.4 KiB
LLVM
; RUN: llc -mtriple=amdgcn -mcpu=tahiti -start-before=amdgpu-unify-divergent-exit-nodes < %s | FileCheck -enable-var-scope -check-prefix=GCN %s
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; RUN: llc -enable-no-signed-zeros-fp-math -mtriple=amdgcn -mcpu=tahiti -start-before=amdgpu-unify-divergent-exit-nodes < %s | FileCheck -enable-var-scope -check-prefix=GCN %s
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; --------------------------------------------------------------------------------
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; rcp_legacy tests
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; --------------------------------------------------------------------------------
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; GCN-LABEL: {{^}}v_fneg_rcp_legacy_f32:
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; GCN: {{buffer|flat}}_load_dword [[A:v[0-9]+]]
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; GCN: v_rcp_legacy_f32_e64 [[RESULT:v[0-9]+]], -[[A]]
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; GCN: {{buffer|flat}}_store_dword [[RESULT]]
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define amdgpu_kernel void @v_fneg_rcp_legacy_f32(ptr addrspace(1) %out, ptr addrspace(1) %a.ptr) #0 {
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%tid = call i32 @llvm.amdgcn.workitem.id.x()
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%tid.ext = sext i32 %tid to i64
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%a.gep = getelementptr inbounds float, ptr addrspace(1) %a.ptr, i64 %tid.ext
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%out.gep = getelementptr inbounds float, ptr addrspace(1) %out, i64 %tid.ext
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%a = load volatile float, ptr addrspace(1) %a.gep
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%rcp = call float @llvm.amdgcn.rcp.legacy(float %a)
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%fneg = fsub float -0.000000e+00, %rcp
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store float %fneg, ptr addrspace(1) %out.gep
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ret void
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}
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declare i32 @llvm.amdgcn.workitem.id.x() #1
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declare float @llvm.amdgcn.rcp.legacy(float) #1
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone }
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