a1710eb3cd
The LIT test cases were migrated with the script provided by Nikita Popov. No manual changes were made. Committed without review since no functional changes, after consultation with uweigand.
42 lines
1.1 KiB
LLVM
42 lines
1.1 KiB
LLVM
; Test floating-point negation on z14.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 | FileCheck %s
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; Test f32.
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define float @f1(float %f) {
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; CHECK-LABEL: f1:
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; CHECK: lcdfr %f0, %f0
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; CHECK: br %r14
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%res = fneg float %f
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ret float %res
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}
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; Test f64.
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define double @f2(double %f) {
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; CHECK-LABEL: f2:
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; CHECK: lcdfr %f0, %f0
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; CHECK: br %r14
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%res = fneg double %f
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ret double %res
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}
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; Test f128. With the loads and stores, a pure negation would probably
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; be better implemented using an XI on the upper byte. Do some extra
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; processing so that using FPRs is unequivocally better.
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define void @f3(ptr %ptr, ptr %ptr2) {
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; CHECK-LABEL: f3:
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; CHECK-DAG: vl [[REG1:%v[0-9]+]], 0(%r2)
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; CHECK-DAG: vl [[REG2:%v[0-9]+]], 0(%r3)
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; CHECK-DAG: wflcxb [[NEGREG1:%v[0-9]+]], [[REG1]]
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; CHECK: wfdxb [[RES:%v[0-9]+]], [[NEGREG1]], [[REG2]]
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; CHECK: vst [[RES]], 0(%r2)
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; CHECK: br %r14
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%orig = load fp128, ptr %ptr
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%negzero = fpext float -0.0 to fp128
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%neg = fneg fp128 %orig
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%op2 = load fp128, ptr %ptr2
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%res = fdiv fp128 %neg, %op2
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store fp128 %res, ptr %ptr
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ret void
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}
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