1 ; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=GCN -check-prefix=FUNC %s 2 ; RUN: llc -march=amdgcn -mcpu=tonga -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 6 define 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 15 define 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 31 define 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\[[0-9]+:[0-9]+\]}}, 0, -{{s\[[0-9]+:[0-9]+\]$}} 43 define 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\[[0-9]+:[0-9]+\]}}, 0xb 52 ; VI: s_load_dwordx2 [[NEG_VALUE:s\[[0-9]+:[0-9]+\]]], {{s\[[0-9]+:[0-9]+\]}}, 0x2c 53 ; GCN-NOT: xor 54 ; GCN: v_mul_f64 {{v\[[0-9]+:[0-9]+\]}}, -[[NEG_VALUE]], [[NEG_VALUE]] 55 define void @fneg_fold_f64(double addrspace(1)* %out, 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
