mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-14 23:48:49 +00:00
9615d702ad
This patch allows a vector fneg of a bitcasted integer value to be optimized in the same way that we already optimize a scalar fneg. If the integer variable is a constant, we can precompute the result and not require any logic ops. This patch is very similar to a fabs patch committed at r214892. Differential Revision: http://reviews.llvm.org/D4852 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215646 91177308-0d34-0410-b5e6-96231b3b80d8
122 lines
3.5 KiB
LLVM
122 lines
3.5 KiB
LLVM
; RUN: llc -mtriple=arm-eabi -mattr=+vfp2 %s -o - \
|
|
; RUN: | FileCheck %s -check-prefix=VFP2
|
|
|
|
; RUN: llc -mtriple=arm-eabi -mattr=+neon,-neonfp %s -o - \
|
|
; RUN: | FileCheck %s -check-prefix=NFP0
|
|
|
|
; RUN: llc -mtriple=arm-eabi -mattr=+neon,+neonfp %s -o - \
|
|
; RUN: | FileCheck %s -check-prefix=NFP1
|
|
|
|
; RUN: llc -mtriple=arm-eabi -mcpu=cortex-a8 %s -o - \
|
|
; RUN: | FileCheck %s -check-prefix=CORTEXA8
|
|
|
|
; RUN: llc -mtriple=arm-eabi -mcpu=cortex-a8 --enable-unsafe-fp-math %s -o - \
|
|
; RUN: | FileCheck %s -check-prefix=CORTEXA8U
|
|
|
|
; RUN: llc -mtriple=arm-darwin -mcpu=cortex-a8 %s -o - \
|
|
; RUN: | FileCheck %s -check-prefix=CORTEXA8U
|
|
|
|
; RUN: llc -mtriple=arm-eabi -mcpu=cortex-a9 %s -o - \
|
|
; RUN: | FileCheck %s -check-prefix=CORTEXA9
|
|
|
|
define float @test1(float* %a) {
|
|
entry:
|
|
%0 = load float* %a, align 4 ; <float> [#uses=2]
|
|
%1 = fsub float -0.000000e+00, %0 ; <float> [#uses=2]
|
|
%2 = fpext float %1 to double ; <double> [#uses=1]
|
|
%3 = fcmp olt double %2, 1.234000e+00 ; <i1> [#uses=1]
|
|
%retval = select i1 %3, float %1, float %0 ; <float> [#uses=1]
|
|
ret float %retval
|
|
}
|
|
; VFP2-LABEL: test1:
|
|
; VFP2: vneg.f32 s{{.*}}, s{{.*}}
|
|
|
|
; NFP1-LABEL: test1:
|
|
; NFP1: vneg.f32 d{{.*}}, d{{.*}}
|
|
|
|
; NFP0-LABEL: test1:
|
|
; NFP0: vneg.f32 s{{.*}}, s{{.*}}
|
|
|
|
; CORTEXA8-LABEL: test1:
|
|
; CORTEXA8: vneg.f32 s{{.*}}, s{{.*}}
|
|
|
|
; CORTEXA8U-LABEL: test1:
|
|
; CORTEXA8U: vneg.f32 d{{.*}}, d{{.*}}
|
|
|
|
; CORTEXA9-LABEL: test1:
|
|
; CORTEXA9: vneg.f32 s{{.*}}, s{{.*}}
|
|
|
|
define float @test2(float* %a) {
|
|
entry:
|
|
%0 = load float* %a, align 4 ; <float> [#uses=2]
|
|
%1 = fmul float -1.000000e+00, %0 ; <float> [#uses=2]
|
|
%2 = fpext float %1 to double ; <double> [#uses=1]
|
|
%3 = fcmp olt double %2, 1.234000e+00 ; <i1> [#uses=1]
|
|
%retval = select i1 %3, float %1, float %0 ; <float> [#uses=1]
|
|
ret float %retval
|
|
}
|
|
; VFP2-LABEL: test2:
|
|
; VFP2: vneg.f32 s{{.*}}, s{{.*}}
|
|
|
|
; NFP1-LABEL: test2:
|
|
; NFP1: vneg.f32 d{{.*}}, d{{.*}}
|
|
|
|
; NFP0-LABEL: test2:
|
|
; NFP0: vneg.f32 s{{.*}}, s{{.*}}
|
|
|
|
; CORTEXA8-LABEL: test2:
|
|
; CORTEXA8: vneg.f32 s{{.*}}, s{{.*}}
|
|
|
|
; CORTEXA8U-LABEL: test2:
|
|
; CORTEXA8U: vneg.f32 d{{.*}}, d{{.*}}
|
|
|
|
; CORTEXA9-LABEL: test2:
|
|
; CORTEXA9: vneg.f32 s{{.*}}, s{{.*}}
|
|
|
|
; If we're bitcasting an integer to an FP vector, we should avoid the FP/vector unit entirely.
|
|
; Make sure that we're flipping the sign bit and only the sign bit of each float (PR20354).
|
|
; So instead of something like this:
|
|
; vmov d16, r0, r1
|
|
; vneg.f32 d16, d16
|
|
; vmov r0, r1, d16
|
|
;
|
|
; We should generate:
|
|
; eor r0, r0, #-214783648
|
|
; eor r1, r1, #-214783648
|
|
|
|
define <2 x float> @fneg_bitcast(i64 %i) {
|
|
%bitcast = bitcast i64 %i to <2 x float>
|
|
%fneg = fsub <2 x float> <float -0.0, float -0.0>, %bitcast
|
|
ret <2 x float> %fneg
|
|
}
|
|
; VFP2-LABEL: fneg_bitcast:
|
|
; VFP2-DAG: eor r0, r0, #-2147483648
|
|
; VFP2-DAG: eor r1, r1, #-2147483648
|
|
; VFP2-NOT: vneg.f32
|
|
|
|
; NFP1-LABEL: fneg_bitcast:
|
|
; NFP1-DAG: eor r0, r0, #-2147483648
|
|
; NFP1-DAG: eor r1, r1, #-2147483648
|
|
; NFP1-NOT: vneg.f32
|
|
|
|
; NFP0-LABEL: fneg_bitcast:
|
|
; NFP0-DAG: eor r0, r0, #-2147483648
|
|
; NFP0-DAG: eor r1, r1, #-2147483648
|
|
; NFP0-NOT: vneg.f32
|
|
|
|
; CORTEXA8-LABEL: fneg_bitcast:
|
|
; CORTEXA8-DAG: eor r0, r0, #-2147483648
|
|
; CORTEXA8-DAG: eor r1, r1, #-2147483648
|
|
; CORTEXA8-NOT: vneg.f32
|
|
|
|
; CORTEXA8U-LABEL: fneg_bitcast:
|
|
; CORTEXA8U-DAG: eor r0, r0, #-2147483648
|
|
; CORTEXA8U-DAG: eor r1, r1, #-2147483648
|
|
; CORTEXA8U-NOT: vneg.f32
|
|
|
|
; CORTEXA9-LABEL: fneg_bitcast:
|
|
; CORTEXA9-DAG: eor r0, r0, #-2147483648
|
|
; CORTEXA9-DAG: eor r1, r1, #-2147483648
|
|
; CORTEXA9-NOT: vneg.f32
|
|
|