1; Test floating-point negation.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5; Test f32.
6define float @f1(float %f) {
7; CHECK-LABEL: f1:
8; CHECK: lcebr %f0, %f0
9; CHECK: br %r14
10  %res = fsub float -0.0, %f
11  ret float %res
12}
13
14; Test f64.
15define double @f2(double %f) {
16; CHECK-LABEL: f2:
17; CHECK: lcdbr %f0, %f0
18; CHECK: br %r14
19  %res = fsub double -0.0, %f
20  ret double %res
21}
22
23; Test f128.  With the loads and stores, a pure negation would probably
24; be better implemented using an XI on the upper byte.  Do some extra
25; processing so that using FPRs is unequivocally better.
26define void @f3(fp128 *%ptr, fp128 *%ptr2) {
27; CHECK-LABEL: f3:
28; CHECK: lcxbr
29; CHECK: dxbr
30; CHECK: br %r14
31  %orig = load fp128 , fp128 *%ptr
32  %negzero = fpext float -0.0 to fp128
33  %neg = fsub fp128 0xL00000000000000008000000000000000, %orig
34  %op2 = load fp128 , fp128 *%ptr2
35  %res = fdiv fp128 %neg, %op2
36  store fp128 %res, fp128 *%ptr
37  ret void
38}
39