45 lines
1.2 KiB
LLVM
45 lines
1.2 KiB
LLVM
; Test negated floating-point absolute.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
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; Test f32.
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declare float @llvm.fabs.f32(float %f)
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define float @f1(float %f) {
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; CHECK-LABEL: f1:
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; CHECK: lndfr %f0, %f0
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; CHECK: br %r14
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%abs = call float @llvm.fabs.f32(float %f)
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%res = fsub float -0.0, %abs
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ret float %res
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}
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; Test f64.
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declare double @llvm.fabs.f64(double %f)
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define double @f2(double %f) {
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; CHECK-LABEL: f2:
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; CHECK: lndfr %f0, %f0
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; CHECK: br %r14
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%abs = call double @llvm.fabs.f64(double %f)
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%res = fsub double -0.0, %abs
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ret double %res
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}
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; Test f128. With the loads and stores, a pure negative-absolute would
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; probably be better implemented using an OI on the upper byte. Do some
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; extra processing so that using FPRs is unequivocally better.
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declare fp128 @llvm.fabs.f128(fp128 %f)
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define void @f3(fp128 *%ptr, fp128 *%ptr2) {
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; CHECK-LABEL: f3:
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; CHECK: lnxbr
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; CHECK: dxbr
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; CHECK: br %r14
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%orig = load fp128, fp128 *%ptr
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%abs = call fp128 @llvm.fabs.f128(fp128 %orig)
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%negabs = fsub fp128 0xL00000000000000008000000000000000, %abs
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%op2 = load fp128, fp128 *%ptr2
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%res = fdiv fp128 %negabs, %op2
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store fp128 %res, fp128 *%ptr
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ret void
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}
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