llvm-6502/test/CodeGen/R600/fneg.f64.ll
Tom Stellard 1f996fa36b R600/SI: Add a stub GCNTargetMachine
This is equivalent to the AMDGPUTargetMachine now, but it is the
starting point for separating R600 and GCN functionality into separate
targets.

It is recommened that users start using the gcn triple for GCN-based
GPUs, because using the r600 triple for these GPUs will be deprecated in
the future.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225277 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-06 18:00:21 +00:00

60 lines
1.9 KiB
LLVM

; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
; FUNC-LABEL: {{^}}fneg_f64:
; SI: v_xor_b32
define void @fneg_f64(double addrspace(1)* %out, double %in) {
%fneg = fsub double -0.000000e+00, %in
store double %fneg, double addrspace(1)* %out
ret void
}
; FUNC-LABEL: {{^}}fneg_v2f64:
; SI: v_xor_b32
; SI: v_xor_b32
define void @fneg_v2f64(<2 x double> addrspace(1)* nocapture %out, <2 x double> %in) {
%fneg = fsub <2 x double> <double -0.000000e+00, double -0.000000e+00>, %in
store <2 x double> %fneg, <2 x double> addrspace(1)* %out
ret void
}
; FUNC-LABEL: {{^}}fneg_v4f64:
; R600: -PV
; R600: -T
; R600: -PV
; R600: -PV
; SI: v_xor_b32
; SI: v_xor_b32
; SI: v_xor_b32
; SI: v_xor_b32
define void @fneg_v4f64(<4 x double> addrspace(1)* nocapture %out, <4 x double> %in) {
%fneg = fsub <4 x double> <double -0.000000e+00, double -0.000000e+00, double -0.000000e+00, double -0.000000e+00>, %in
store <4 x double> %fneg, <4 x double> addrspace(1)* %out
ret void
}
; DAGCombiner will transform:
; (fneg (f64 bitcast (i64 a))) => (f64 bitcast (xor (i64 a), 0x80000000))
; unless the target returns true for isNegFree()
; FUNC-LABEL: {{^}}fneg_free_f64:
; FIXME: Unnecessary copy to VGPRs
; SI: v_add_f64 {{v\[[0-9]+:[0-9]+\]}}, {{v\[[0-9]+:[0-9]+\]}}, -{{v\[[0-9]+:[0-9]+\]$}}
define void @fneg_free_f64(double addrspace(1)* %out, i64 %in) {
%bc = bitcast i64 %in to double
%fsub = fsub double 0.0, %bc
store double %fsub, double addrspace(1)* %out
ret void
}
; SI-LABEL: {{^}}fneg_fold_f64:
; SI: s_load_dwordx2 [[NEG_VALUE:s\[[0-9]+:[0-9]+\]]], {{s\[[0-9]+:[0-9]+\]}}, 0xb
; SI-NOT: xor
; SI: v_mul_f64 {{v\[[0-9]+:[0-9]+\]}}, -[[NEG_VALUE]], [[NEG_VALUE]]
define void @fneg_fold_f64(double addrspace(1)* %out, double %in) {
%fsub = fsub double -0.0, %in
%fmul = fmul double %fsub, %in
store double %fmul, double addrspace(1)* %out
ret void
}