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https://github.com/c64scene-ar/llvm-6502.git
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d4a37e6137
For now this matches the equivalent of (neg (abs ...)), which did hit a few times in projects/test-suite. We should probably also match cases where absolute-like selects are used with reversed arguments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188671 91177308-0d34-0410-b5e6-96231b3b80d8
92 lines
2.1 KiB
LLVM
92 lines
2.1 KiB
LLVM
; Test negative integer absolute.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Test i32->i32 negative absolute using slt.
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define i32 @f1(i32 %val) {
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; CHECK-LABEL: f1:
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; CHECK: lnr %r2, %r2
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; CHECK: br %r14
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%cmp = icmp slt i32 %val, 0
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%neg = sub i32 0, %val
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%abs = select i1 %cmp, i32 %neg, i32 %val
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%res = sub i32 0, %abs
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ret i32 %res
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}
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; Test i32->i32 negative absolute using sle.
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define i32 @f2(i32 %val) {
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; CHECK-LABEL: f2:
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; CHECK: lnr %r2, %r2
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; CHECK: br %r14
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%cmp = icmp sle i32 %val, 0
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%neg = sub i32 0, %val
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%abs = select i1 %cmp, i32 %neg, i32 %val
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%res = sub i32 0, %abs
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ret i32 %res
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}
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; Test i32->i32 negative absolute using sgt.
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define i32 @f3(i32 %val) {
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; CHECK-LABEL: f3:
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; CHECK: lnr %r2, %r2
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; CHECK: br %r14
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%cmp = icmp sgt i32 %val, 0
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%neg = sub i32 0, %val
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%abs = select i1 %cmp, i32 %val, i32 %neg
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%res = sub i32 0, %abs
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ret i32 %res
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}
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; Test i32->i32 negative absolute using sge.
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define i32 @f4(i32 %val) {
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; CHECK-LABEL: f4:
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; CHECK: lnr %r2, %r2
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; CHECK: br %r14
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%cmp = icmp sge i32 %val, 0
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%neg = sub i32 0, %val
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%abs = select i1 %cmp, i32 %val, i32 %neg
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%res = sub i32 0, %abs
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ret i32 %res
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}
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; Test i32->i64 negative absolute.
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define i64 @f5(i32 %val) {
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; CHECK-LABEL: f5:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%ext = sext i32 %val to i64
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%cmp = icmp slt i64 %ext, 0
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%neg = sub i64 0, %ext
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%abs = select i1 %cmp, i64 %neg, i64 %ext
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%res = sub i64 0, %abs
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ret i64 %res
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}
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; Test i32->i64 negative absolute that uses an "in-register" form of
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; sign extension.
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define i64 @f6(i64 %val) {
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; CHECK-LABEL: f6:
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; CHECK: lngfr %r2, %r2
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; CHECK: br %r14
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%trunc = trunc i64 %val to i32
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%ext = sext i32 %trunc to i64
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%cmp = icmp slt i64 %ext, 0
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%neg = sub i64 0, %ext
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%abs = select i1 %cmp, i64 %neg, i64 %ext
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%res = sub i64 0, %abs
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ret i64 %res
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}
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; Test i64 negative absolute.
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define i64 @f7(i64 %val) {
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; CHECK-LABEL: f7:
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; CHECK: lngr %r2, %r2
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; CHECK: br %r14
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%cmp = icmp slt i64 %val, 0
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%neg = sub i64 0, %val
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%abs = select i1 %cmp, i64 %neg, i64 %val
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%res = sub i64 0, %abs
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ret i64 %res
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}
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