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llvm-mirror/test/CodeGen/X86/fp-select-cmp-and.ll
Benjamin Kramer c63386d01a X86: Turn fp selects into mask operations.
double test(double a, double b, double c, double d) { return a<b ? c : d; }

before:
_test:
	ucomisd	%xmm0, %xmm1
	ja	LBB0_2
	movaps	%xmm3, %xmm2
LBB0_2:
	movaps	%xmm2, %xmm0

after:
_test:
	cmpltsd	%xmm1, %xmm0
	andpd	%xmm0, %xmm2
	andnpd	%xmm3, %xmm0
	orpd	%xmm2, %xmm0

Small speedup on Benchmarks/SmallPT

llvm-svn: 187706
2013-08-04 12:05:16 +00:00

186 lines
4.7 KiB
LLVM

; RUN: llc < %s -march=x86-64 -mtriple=x86_64-apple-darwin -mcpu=nehalem | FileCheck %s
define double @test1(double %a, double %b, double %eps) {
%cmp = fcmp olt double %a, %eps
%cond = select i1 %cmp, double %b, double 0.000000e+00
ret double %cond
; CHECK-LABEL: @test1
; CHECK: cmpltsd %xmm2, %xmm0
; CHECK-NEXT: andpd %xmm1, %xmm0
}
define double @test2(double %a, double %b, double %eps) {
%cmp = fcmp ole double %a, %eps
%cond = select i1 %cmp, double %b, double 0.000000e+00
ret double %cond
; CHECK-LABEL: @test2
; CHECK: cmplesd %xmm2, %xmm0
; CHECK-NEXT: andpd %xmm1, %xmm0
}
define double @test3(double %a, double %b, double %eps) {
%cmp = fcmp ogt double %a, %eps
%cond = select i1 %cmp, double %b, double 0.000000e+00
ret double %cond
; CHECK-LABEL: @test3
; CHECK: cmpltsd %xmm0, %xmm2
; CHECK-NEXT: andpd %xmm1, %xmm2
}
define double @test4(double %a, double %b, double %eps) {
%cmp = fcmp oge double %a, %eps
%cond = select i1 %cmp, double %b, double 0.000000e+00
ret double %cond
; CHECK-LABEL: @test4
; CHECK: cmplesd %xmm0, %xmm2
; CHECK-NEXT: andpd %xmm1, %xmm2
}
define double @test5(double %a, double %b, double %eps) {
%cmp = fcmp olt double %a, %eps
%cond = select i1 %cmp, double 0.000000e+00, double %b
ret double %cond
; CHECK-LABEL: @test5
; CHECK: cmpltsd %xmm2, %xmm0
; CHECK-NEXT: andnpd %xmm1, %xmm0
}
define double @test6(double %a, double %b, double %eps) {
%cmp = fcmp ole double %a, %eps
%cond = select i1 %cmp, double 0.000000e+00, double %b
ret double %cond
; CHECK-LABEL: @test6
; CHECK: cmplesd %xmm2, %xmm0
; CHECK-NEXT: andnpd %xmm1, %xmm0
}
define double @test7(double %a, double %b, double %eps) {
%cmp = fcmp ogt double %a, %eps
%cond = select i1 %cmp, double 0.000000e+00, double %b
ret double %cond
; CHECK-LABEL: @test7
; CHECK: cmpltsd %xmm0, %xmm2
; CHECK-NEXT: andnpd %xmm1, %xmm2
}
define double @test8(double %a, double %b, double %eps) {
%cmp = fcmp oge double %a, %eps
%cond = select i1 %cmp, double 0.000000e+00, double %b
ret double %cond
; CHECK-LABEL: @test8
; CHECK: cmplesd %xmm0, %xmm2
; CHECK-NEXT: andnpd %xmm1, %xmm2
}
define float @test9(float %a, float %b, float %eps) {
%cmp = fcmp olt float %a, %eps
%cond = select i1 %cmp, float %b, float 0.000000e+00
ret float %cond
; CHECK-LABEL: @test9
; CHECK: cmpltss %xmm2, %xmm0
; CHECK-NEXT: andps %xmm1, %xmm0
}
define float @test10(float %a, float %b, float %eps) {
%cmp = fcmp ole float %a, %eps
%cond = select i1 %cmp, float %b, float 0.000000e+00
ret float %cond
; CHECK-LABEL: @test10
; CHECK: cmpless %xmm2, %xmm0
; CHECK-NEXT: andps %xmm1, %xmm0
}
define float @test11(float %a, float %b, float %eps) {
%cmp = fcmp ogt float %a, %eps
%cond = select i1 %cmp, float %b, float 0.000000e+00
ret float %cond
; CHECK-LABEL: @test11
; CHECK: cmpltss %xmm0, %xmm2
; CHECK-NEXT: andps %xmm1, %xmm2
}
define float @test12(float %a, float %b, float %eps) {
%cmp = fcmp oge float %a, %eps
%cond = select i1 %cmp, float %b, float 0.000000e+00
ret float %cond
; CHECK-LABEL: @test12
; CHECK: cmpless %xmm0, %xmm2
; CHECK-NEXT: andps %xmm1, %xmm2
}
define float @test13(float %a, float %b, float %eps) {
%cmp = fcmp olt float %a, %eps
%cond = select i1 %cmp, float 0.000000e+00, float %b
ret float %cond
; CHECK-LABEL: @test13
; CHECK: cmpltss %xmm2, %xmm0
; CHECK-NEXT: andnps %xmm1, %xmm0
}
define float @test14(float %a, float %b, float %eps) {
%cmp = fcmp ole float %a, %eps
%cond = select i1 %cmp, float 0.000000e+00, float %b
ret float %cond
; CHECK-LABEL: @test14
; CHECK: cmpless %xmm2, %xmm0
; CHECK-NEXT: andnps %xmm1, %xmm0
}
define float @test15(float %a, float %b, float %eps) {
%cmp = fcmp ogt float %a, %eps
%cond = select i1 %cmp, float 0.000000e+00, float %b
ret float %cond
; CHECK-LABEL: @test15
; CHECK: cmpltss %xmm0, %xmm2
; CHECK-NEXT: andnps %xmm1, %xmm2
}
define float @test16(float %a, float %b, float %eps) {
%cmp = fcmp oge float %a, %eps
%cond = select i1 %cmp, float 0.000000e+00, float %b
ret float %cond
; CHECK-LABEL: @test16
; CHECK: cmpless %xmm0, %xmm2
; CHECK-NEXT: andnps %xmm1, %xmm2
}
define float @test17(float %a, float %b, float %c, float %eps) {
%cmp = fcmp oge float %a, %eps
%cond = select i1 %cmp, float %c, float %b
ret float %cond
; CHECK-LABEL: @test17
; CHECK: cmpless %xmm0, %xmm3
; CHECK-NEXT: andps %xmm3, %xmm2
; CHECK-NEXT: andnps %xmm1, %xmm3
; CHECK-NEXT: orps %xmm2, %xmm3
}
define double @test18(double %a, double %b, double %c, double %eps) {
%cmp = fcmp oge double %a, %eps
%cond = select i1 %cmp, double %c, double %b
ret double %cond
; CHECK-LABEL: @test18
; CHECK: cmplesd %xmm0, %xmm3
; CHECK-NEXT: andpd %xmm3, %xmm2
; CHECK-NEXT: andnpd %xmm1, %xmm3
; CHECK-NEXT: orpd %xmm2, %xmm3
}