derek.holloway
7502bf64a4
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52 lines
1.2 KiB
LLVM
52 lines
1.2 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 f16.
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define half @f0(half %f) {
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; CHECK-LABEL: f0:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lcdfr %f0, %f0
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; CHECK-NEXT: br %r14
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%res = fneg half %f
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ret half %res
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}
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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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