derek.holloway
7502bf64a4
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26 lines
738 B
LLVM
26 lines
738 B
LLVM
; RUN: llc -mtriple=amdgcn < %s | FileCheck -check-prefix=GCN %s
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; GCN-LABEL: @bfe_uniform
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; GCN: s_bfe_u32 s{{[0-9]+}}, s{{[0-9]+}}, 0x40010
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define amdgpu_kernel void @bfe_uniform(i32 %val, ptr addrspace(1) %out) {
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%hibits = lshr i32 %val, 16
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%masked = and i32 %hibits, 15
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store i32 %masked, ptr addrspace(1) %out
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ret void
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}
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; GCN-LABEL: @bfe_divergent
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; GCN: v_bfe_u32 v{{[0-9]+}}, v{{[0-9]+}}, 16, 4
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define amdgpu_kernel void @bfe_divergent(i32 %val, ptr addrspace(1) %out) {
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%tid = call i32 @llvm.amdgcn.workitem.id.x()
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%divergent = add i32 %val, %tid
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%hibits = lshr i32 %divergent, 16
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%masked = and i32 %hibits, 15
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store i32 %masked, ptr addrspace(1) %out
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ret void
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}
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declare i32 @llvm.amdgcn.workitem.id.x()
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