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https://github.com/c64scene-ar/llvm-6502.git
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b503b49b51
This adds all CodeGen tests for the SystemZ target. This version of the patch incorporates feedback from a review by Sean Silva. Thanks to all reviewers! Patch by Richard Sandiford. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181204 91177308-0d34-0410-b5e6-96231b3b80d8
39 lines
918 B
LLVM
39 lines
918 B
LLVM
; Test floating-point negation.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Test f32.
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define float @f1(float %f) {
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; CHECK: f1:
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; CHECK: lcebr %f0, %f0
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; CHECK: br %r14
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%res = fsub float -0.0, %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: f2:
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; CHECK: lcdbr %f0, %f0
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; CHECK: br %r14
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%res = fsub double -0.0, %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(fp128 *%ptr, fp128 *%ptr2) {
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; CHECK: f3:
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; CHECK: lcxbr
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; CHECK: dxbr
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; CHECK: br %r14
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%orig = load fp128 *%ptr
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%negzero = fpext float -0.0 to fp128
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%neg = fsub fp128 0xL00000000000000008000000000000000, %orig
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%op2 = load fp128 *%ptr2
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%res = fdiv fp128 %neg, %op2
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store fp128 %res, fp128 *%ptr
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ret void
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}
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