1; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=GCN -check-prefix=FUNC %s 2; RUN: llc -march=amdgcn -mcpu=tonga -mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -check-prefix=VI -check-prefix=GCN -check-prefix=FUNC %s 3 4; FUNC-LABEL: {{^}}fneg_f64: 5; GCN: v_xor_b32 6define amdgpu_kernel void @fneg_f64(double addrspace(1)* %out, double %in) { 7 %fneg = fsub double -0.000000e+00, %in 8 store double %fneg, double addrspace(1)* %out 9 ret void 10} 11 12; FUNC-LABEL: {{^}}fneg_v2f64: 13; GCN: v_xor_b32 14; GCN: v_xor_b32 15define amdgpu_kernel void @fneg_v2f64(<2 x double> addrspace(1)* nocapture %out, <2 x double> %in) { 16 %fneg = fsub <2 x double> <double -0.000000e+00, double -0.000000e+00>, %in 17 store <2 x double> %fneg, <2 x double> addrspace(1)* %out 18 ret void 19} 20 21; FUNC-LABEL: {{^}}fneg_v4f64: 22; R600: -PV 23; R600: -T 24; R600: -PV 25; R600: -PV 26 27; GCN: v_xor_b32 28; GCN: v_xor_b32 29; GCN: v_xor_b32 30; GCN: v_xor_b32 31define amdgpu_kernel void @fneg_v4f64(<4 x double> addrspace(1)* nocapture %out, <4 x double> %in) { 32 %fneg = fsub <4 x double> <double -0.000000e+00, double -0.000000e+00, double -0.000000e+00, double -0.000000e+00>, %in 33 store <4 x double> %fneg, <4 x double> addrspace(1)* %out 34 ret void 35} 36 37; DAGCombiner will transform: 38; (fneg (f64 bitcast (i64 a))) => (f64 bitcast (xor (i64 a), 0x80000000)) 39; unless the target returns true for isNegFree() 40 41; FUNC-LABEL: {{^}}fneg_free_f64: 42; GCN: v_add_f64 {{v\[[0-9]+:[0-9]+\]}}, -{{s\[[0-9]+:[0-9]+\]}}, 0{{$}} 43define amdgpu_kernel void @fneg_free_f64(double addrspace(1)* %out, i64 %in) { 44 %bc = bitcast i64 %in to double 45 %fsub = fsub double 0.0, %bc 46 store double %fsub, double addrspace(1)* %out 47 ret void 48} 49 50; GCN-LABEL: {{^}}fneg_fold_f64: 51; SI: s_load_dwordx2 [[NEG_VALUE:s\[[0-9]+:[0-9]+\]]], {{s\[[0-9]+:[0-9]+\]}}, 0x13 52; VI: s_load_dwordx2 [[NEG_VALUE:s\[[0-9]+:[0-9]+\]]], {{s\[[0-9]+:[0-9]+\]}}, 0x4c 53; GCN-NOT: xor 54; GCN: v_mul_f64 {{v\[[0-9]+:[0-9]+\]}}, -[[NEG_VALUE]], [[NEG_VALUE]] 55define amdgpu_kernel void @fneg_fold_f64(double addrspace(1)* %out, [8 x i32], double %in) { 56 %fsub = fsub double -0.0, %in 57 %fmul = fmul double %fsub, %in 58 store double %fmul, double addrspace(1)* %out 59 ret void 60} 61