derek.holloway
7502bf64a4
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65 lines
1.8 KiB
LLVM
65 lines
1.8 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64--"
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; CHECK-LABEL: double_rounding_safe:
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; CHECK: callq __trunctfdf2
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; CHECK-NEXT: cvtsd2ss %xmm0
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define void @double_rounding_safe(ptr %x, ptr %f) {
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entry:
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%x.fp128 = load fp128, ptr %x, align 16
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%x.double = fptrunc fp128 %x.fp128 to double
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%x.float = fptrunc double %x.double to float
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store float %x.float, ptr %f, align 4
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ret void
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}
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; CHECK-LABEL: double_rounding_contract_fst:
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; CHECK: callq __trunctfdf2
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; CHECK-NEXT: cvtsd2ss %xmm0
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define void @double_rounding_contract_fst(ptr %x, ptr %f) {
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entry:
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%x.fp128 = load fp128, ptr %x, align 16
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%x.double = fptrunc contract fp128 %x.fp128 to double
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%x.float = fptrunc double %x.double to float
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store float %x.float, ptr %f, align 4
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ret void
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}
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; CHECK-LABEL: double_rounding_contract_snd:
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; CHECK: callq __trunctfdf2
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; CHECK-NEXT: cvtsd2ss %xmm0
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define void @double_rounding_contract_snd(ptr %x, ptr %f) {
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entry:
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%x.fp128 = load fp128, ptr %x, align 16
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%x.double = fptrunc fp128 %x.fp128 to double
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%x.float = fptrunc contract double %x.double to float
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store float %x.float, ptr %f, align 4
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ret void
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}
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; CHECK-LABEL: double_rounding:
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; CHECK: callq __trunctfsf2
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; CHECK-NOT: cvt
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define void @double_rounding(ptr %x, ptr %f) {
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entry:
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%x.fp128 = load fp128, ptr %x, align 16
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%x.double = fptrunc contract fp128 %x.fp128 to double
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%x.float = fptrunc contract double %x.double to float
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store float %x.float, ptr %f, align 4
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ret void
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}
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; CHECK-LABEL: double_rounding_precise_first:
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; CHECK: fstps (%
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; CHECK-NOT: fstpl
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define void @double_rounding_precise_first(ptr %f) {
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entry:
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; Hack, to generate a precise FP_ROUND to double
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%precise = call double asm sideeffect "fld %st(0)", "={st(0)}"()
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%0 = fptrunc double %precise to float
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store float %0, ptr %f, align 4
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ret void
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}
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