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c3c5eef5bb
Add a new node to act as a fancy bitcast from f16 operations to i32 that implicitly zero the high 16-bits of the result. Alternatively could try making v2f16 legal and canonicalizing on build_vectors. llvm-svn: 299246
50 lines
2.0 KiB
LLVM
50 lines
2.0 KiB
LLVM
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=SI %s
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; RUN: llc -march=amdgcn -mcpu=fiji -mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=VI %s
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declare half @llvm.sqrt.f16(half %a)
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declare <2 x half> @llvm.sqrt.v2f16(<2 x half> %a)
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; GCN-LABEL: {{^}}sqrt_f16
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; GCN: buffer_load_ushort v[[A_F16:[0-9]+]]
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; SI: v_cvt_f32_f16_e32 v[[A_F32:[0-9]+]], v[[A_F16]]
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; SI: v_sqrt_f32_e32 v[[R_F32:[0-9]+]], v[[A_F32]]
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; SI: v_cvt_f16_f32_e32 v[[R_F16:[0-9]+]], v[[R_F32]]
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; VI: v_sqrt_f16_e32 v[[R_F16:[0-9]+]], v[[A_F16]]
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; GCN: buffer_store_short v[[R_F16]]
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; GCN: s_endpgm
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define amdgpu_kernel void @sqrt_f16(
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half addrspace(1)* %r,
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half addrspace(1)* %a) {
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entry:
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%a.val = load half, half addrspace(1)* %a
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%r.val = call half @llvm.sqrt.f16(half %a.val)
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store half %r.val, half addrspace(1)* %r
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ret void
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}
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; GCN-LABEL: {{^}}sqrt_v2f16
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; GCN: buffer_load_dword v[[A_V2_F16:[0-9]+]]
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; SI: v_cvt_f32_f16_e32 v[[A_F32_0:[0-9]+]], v[[A_V2_F16]]
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; GCN: v_lshrrev_b32_e32 v[[A_F16_1:[0-9]+]], 16, v[[A_V2_F16]]
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; SI: v_cvt_f32_f16_e32 v[[A_F32_1:[0-9]+]], v[[A_F16_1]]
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; SI: v_sqrt_f32_e32 v[[R_F32_0:[0-9]+]], v[[A_F32_0]]
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; SI: v_cvt_f16_f32_e32 v[[R_F16_0:[0-9]+]], v[[R_F32_0]]
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; SI: v_sqrt_f32_e32 v[[R_F32_1:[0-9]+]], v[[A_F32_1]]
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; SI: v_cvt_f16_f32_e32 v[[R_F16_1:[0-9]+]], v[[R_F32_1]]
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; VI-DAG: v_sqrt_f16_e32 v[[R_F16_0:[0-9]+]], v[[A_V2_F16]]
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; VI-DAG: v_sqrt_f16_e32 v[[R_F16_1:[0-9]+]], v[[A_F16_1]]
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; GCN-DAG: v_lshlrev_b32_e32 v[[R_F16_HI:[0-9]+]], 16, v[[R_F16_1]]
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; GCN-NOT: v_and_b32
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; GCN: v_or_b32_e32 v[[R_V2_F16:[0-9]+]], v[[R_F16_HI]], v[[R_F16_0]]
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; GCN: buffer_store_dword v[[R_V2_F16]]
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; GCN: s_endpgm
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define amdgpu_kernel void @sqrt_v2f16(
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<2 x half> addrspace(1)* %r,
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<2 x half> addrspace(1)* %a) {
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entry:
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%a.val = load <2 x half>, <2 x half> addrspace(1)* %a
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%r.val = call <2 x half> @llvm.sqrt.v2f16(<2 x half> %a.val)
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store <2 x half> %r.val, <2 x half> addrspace(1)* %r
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ret void
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}
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