1; Test that floating-point instructions that set cc are used to
2; eliminate compares for load complement, load negative and load
3; positive. Right now, the WFL.DB (vector) instructions are not
4; handled by SystemZElimcompare, so for Z13 this is currently
5; unimplemented.
6;
7; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s -check-prefix=CHECK-Z10
8
9; Load complement (sign-bit flipped).
10; Test f32
11define float @f1(float %a, float %b, float %f) {
12; CHECK-LABEL: f1:
13; CHECK-Z10: lcebr
14; CHECK-Z10-NEXT: je
15  %neg = fsub float -0.0, %f
16  %cond = fcmp oeq float %neg, 0.0
17  %res = select i1 %cond, float %a, float %b
18  ret float %res
19}
20
21; Test f64
22define double @f2(double %a, double %b, double %f) {
23; CHECK-LABEL: f2:
24; CHECK-Z10: lcdbr
25; CHECK-Z10-NEXT: je
26  %neg = fsub double -0.0, %f
27  %cond = fcmp oeq double %neg, 0.0
28  %res = select i1 %cond, double %a, double %b
29  ret double %res
30}
31
32; Negation of floating-point absolute.
33; Test f32
34declare float @llvm.fabs.f32(float %f)
35define float @f3(float %a, float %b, float %f) {
36; CHECK-LABEL: f3:
37; CHECK-Z10: lnebr
38; CHECK-Z10-NEXT: je
39  %abs = call float @llvm.fabs.f32(float %f)
40  %neg = fsub float -0.0, %abs
41  %cond = fcmp oeq float %neg, 0.0
42  %res = select i1 %cond, float %a, float %b
43  ret float %res
44}
45
46; Test f64
47declare double @llvm.fabs.f64(double %f)
48define double @f4(double %a, double %b, double %f) {
49; CHECK-LABEL: f4:
50; CHECK-Z10: lndbr
51; CHECK-Z10-NEXT: je
52  %abs = call double @llvm.fabs.f64(double %f)
53  %neg = fsub double -0.0, %abs
54  %cond = fcmp oeq double %neg, 0.0
55  %res = select i1 %cond, double %a, double %b
56  ret double %res
57}
58
59; Absolute floating-point value.
60; Test f32
61define float @f5(float %a, float %b, float %f) {
62; CHECK-LABEL: f5:
63; CHECK-Z10: lpebr
64; CHECK-Z10-NEXT: je
65  %abs = call float @llvm.fabs.f32(float %f)
66  %cond = fcmp oeq float %abs, 0.0
67  %res = select i1 %cond, float %a, float %b
68  ret float %res
69}
70
71; Test f64
72define double @f6(double %a, double %b, double %f) {
73; CHECK-LABEL: f6:
74; CHECK-Z10: lpdbr
75; CHECK-Z10-NEXT: je
76  %abs = call double @llvm.fabs.f64(double %f)
77  %cond = fcmp oeq double %abs, 0.0
78  %res = select i1 %cond, double %a, double %b
79  ret double %res
80}
81
82