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Ulrich Weigand33435c42017-07-17 17:42:48 +00001; Test negated floating-point absolute on z14.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z14 | FileCheck %s
4
5; Test f32.
6declare float @llvm.fabs.f32(float %f)
7define float @f1(float %f) {
8; CHECK-LABEL: f1:
9; CHECK: lndfr %f0, %f0
10; CHECK: br %r14
11 %abs = call float @llvm.fabs.f32(float %f)
12 %res = fsub float -0.0, %abs
13 ret float %res
14}
15
16; Test f64.
17declare double @llvm.fabs.f64(double %f)
18define double @f2(double %f) {
19; CHECK-LABEL: f2:
20; CHECK: lndfr %f0, %f0
21; CHECK: br %r14
22 %abs = call double @llvm.fabs.f64(double %f)
23 %res = fsub double -0.0, %abs
24 ret double %res
25}
26
27; Test f128. With the loads and stores, a pure negative-absolute would
28; probably be better implemented using an OI on the upper byte. Do some
29; extra processing so that using FPRs is unequivocally better.
30declare fp128 @llvm.fabs.f128(fp128 %f)
31define void @f3(fp128 *%ptr, fp128 *%ptr2) {
32; CHECK-LABEL: f3:
33; CHECK: lnxbr
34; CHECK: dxbr
35; CHECK: br %r14
36 %orig = load fp128 , fp128 *%ptr
37 %abs = call fp128 @llvm.fabs.f128(fp128 %orig)
38 %negabs = fsub fp128 0xL00000000000000008000000000000000, %abs
39 %op2 = load fp128 , fp128 *%ptr2
40 %res = fdiv fp128 %negabs, %op2
41 store fp128 %res, fp128 *%ptr
42 ret void
43}