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1b8ab2f134
Current implementation handles unordered comparison poorly in soft-float mode. Consider (a ULE b) which is a <= b. It is lowered to (ledf2(a, b) <= 0 || unorddf2(a, b) != 0) (in general). We can do better job by lowering it to (__gtdf2(a, b) <= 0). Such replacement is true for other CMP's (ult, ugt, uge). In general, we just call same function as for ordered case but negate comparison against zero. Differential Revision: http://reviews.llvm.org/D10804 llvm-svn: 242280
128 lines
2.4 KiB
LLVM
128 lines
2.4 KiB
LLVM
; RUN: llc < %s -march=x86 -mcpu=pentium -mtriple=x86-linux-gnu -float-abi=soft | FileCheck %s
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define i1 @test1(double %d) #0 {
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entry:
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%cmp = fcmp ule double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test1:
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; CHECK: calll __gtdf2
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; CHECK: setle
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; CHECK: retl
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define i1 @test2(double %d) #0 {
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entry:
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%cmp = fcmp ult double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test2:
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; CHECK: calll __gedf2
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; CHECK: sets
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; CHECK: retl
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define i1 @test3(double %d) #0 {
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entry:
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%cmp = fcmp ugt double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test3:
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; CHECK: calll __ledf2
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; CHECK: setg
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; CHECK: retl
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define i1 @test4(double %d) #0 {
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entry:
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%cmp = fcmp uge double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test4:
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; CHECK: calll __ltdf2
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; CHECK: setns
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; CHECK: retl
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define i1 @test5(double %d) #0 {
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entry:
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%cmp = fcmp ole double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test5:
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; CHECK: calll __ledf2
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; CHECK: setle
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; CHECK: retl
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define i1 @test6(double %d) #0 {
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entry:
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%cmp = fcmp olt double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test6:
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; CHECK: calll __ltdf2
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; CHECK: sets
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; CHECK: retl
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define i1 @test7(double %d) #0 {
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entry:
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%cmp = fcmp ogt double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test7:
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; CHECK: calll __gtdf2
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; CHECK: setg
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; CHECK: retl
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define i1 @test8(double %d) #0 {
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entry:
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%cmp = fcmp oge double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test8:
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; CHECK: calll __gedf2
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; CHECK: setns
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; CHECK: retl
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define i1 @test9(double %d) #0 {
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entry:
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%cmp = fcmp oeq double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test9:
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; CHECK: calll __eqdf2
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; CHECK: sete
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; CHECK: retl
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define i1 @test10(double %d) #0 {
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entry:
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%cmp = fcmp ueq double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test10:
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; CHECK: calll __eqdf2
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; CHECK: sete
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; CHECK: calll __unorddf2
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; CHECK: setne
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; CHECK: retl
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define i1 @test11(double %d) #0 {
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entry:
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%cmp = fcmp one double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test11:
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; CHECK: calll __gtdf2
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; CHECK: setg
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; CHECK: calll __ltdf2
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; CHECK: sets
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; CHECK: retl
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define i1 @test12(double %d) #0 {
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entry:
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%cmp = fcmp une double %d, 0.000000e+00
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ret i1 %cmp
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}
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; CHECK-LABEL: test12:
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; CHECK: calll __nedf2
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; CHECK: setne
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; CHECK: retl
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attributes #0 = { "use-soft-float"="true" }
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