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1; Test integer absolute.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
4
5; Test i32->i32 absolute using slt.
6define i32 @f1(i32 %val) {
7; CHECK-LABEL: f1:
8; CHECK: lpr %r2, %r2
9; CHECK: br %r14
10  %cmp = icmp slt i32 %val, 0
11  %neg = sub i32 0, %val
12  %res = select i1 %cmp, i32 %neg, i32 %val
13  ret i32 %res
14}
15
16; Test i32->i32 absolute using sle.
17define i32 @f2(i32 %val) {
18; CHECK-LABEL: f2:
19; CHECK: lpr %r2, %r2
20; CHECK: br %r14
21  %cmp = icmp sle i32 %val, 0
22  %neg = sub i32 0, %val
23  %res = select i1 %cmp, i32 %neg, i32 %val
24  ret i32 %res
25}
26
27; Test i32->i32 absolute using sgt.
28define i32 @f3(i32 %val) {
29; CHECK-LABEL: f3:
30; CHECK: lpr %r2, %r2
31; CHECK: br %r14
32  %cmp = icmp sgt i32 %val, 0
33  %neg = sub i32 0, %val
34  %res = select i1 %cmp, i32 %val, i32 %neg
35  ret i32 %res
36}
37
38; Test i32->i32 absolute using sge.
39define i32 @f4(i32 %val) {
40; CHECK-LABEL: f4:
41; CHECK: lpr %r2, %r2
42; CHECK: br %r14
43  %cmp = icmp sge i32 %val, 0
44  %neg = sub i32 0, %val
45  %res = select i1 %cmp, i32 %val, i32 %neg
46  ret i32 %res
47}
48
49; Test i32->i64 absolute.
50define i64 @f5(i32 %val) {
51; CHECK-LABEL: f5:
52; CHECK: lpgfr %r2, %r2
53; CHECK: br %r14
54  %ext = sext i32 %val to i64
55  %cmp = icmp slt i64 %ext, 0
56  %neg = sub i64 0, %ext
57  %res = select i1 %cmp, i64 %neg, i64 %ext
58  ret i64 %res
59}
60
61; Test i32->i64 absolute that uses an "in-register" form of sign extension.
62define i64 @f6(i64 %val) {
63; CHECK-LABEL: f6:
64; CHECK: lpgfr %r2, %r2
65; CHECK: br %r14
66  %trunc = trunc i64 %val to i32
67  %ext = sext i32 %trunc to i64
68  %cmp = icmp slt i64 %ext, 0
69  %neg = sub i64 0, %ext
70  %res = select i1 %cmp, i64 %neg, i64 %ext
71  ret i64 %res
72}
73
74; Test i64 absolute.
75define i64 @f7(i64 %val) {
76; CHECK-LABEL: f7:
77; CHECK: lpgr %r2, %r2
78; CHECK: br %r14
79  %cmp = icmp slt i64 %val, 0
80  %neg = sub i64 0, %val
81  %res = select i1 %cmp, i64 %neg, i64 %val
82  ret i64 %res
83}
84
85; Test another form of f6, which is that produced by InstCombine.
86define i64 @f8(i64 %val) {
87; CHECK-LABEL: f8:
88; CHECK: lpgfr %r2, %r2
89; CHECK: br %r14
90  %shl = shl i64 %val, 32
91  %ashr = ashr i64 %shl, 32
92  %neg = sub i64 0, %ashr
93  %cmp = icmp slt i64 %shl, 0
94  %abs = select i1 %cmp, i64 %neg, i64 %ashr
95  ret i64 %abs
96}
97
98; Try again with sle rather than slt.
99define i64 @f9(i64 %val) {
100; CHECK-LABEL: f9:
101; CHECK: lpgfr %r2, %r2
102; CHECK: br %r14
103  %shl = shl i64 %val, 32
104  %ashr = ashr i64 %shl, 32
105  %neg = sub i64 0, %ashr
106  %cmp = icmp sle i64 %shl, 0
107  %abs = select i1 %cmp, i64 %neg, i64 %ashr
108  ret i64 %abs
109}
110
111; Repeat f8 with the operands reversed.
112define i64 @f10(i64 %val) {
113; CHECK-LABEL: f10:
114; CHECK: lpgfr %r2, %r2
115; CHECK: br %r14
116  %shl = shl i64 %val, 32
117  %ashr = ashr i64 %shl, 32
118  %neg = sub i64 0, %ashr
119  %cmp = icmp sgt i64 %shl, 0
120  %abs = select i1 %cmp, i64 %ashr, i64 %neg
121  ret i64 %abs
122}
123
124; Try again with sge rather than sgt.
125define i64 @f11(i64 %val) {
126; CHECK-LABEL: f11:
127; CHECK: lpgfr %r2, %r2
128; CHECK: br %r14
129  %shl = shl i64 %val, 32
130  %ashr = ashr i64 %shl, 32
131  %neg = sub i64 0, %ashr
132  %cmp = icmp sge i64 %shl, 0
133  %abs = select i1 %cmp, i64 %ashr, i64 %neg
134  ret i64 %abs
135}
136
137; Repeat f5 with the comparison on the unextended value.
138define i64 @f12(i32 %val) {
139; CHECK-LABEL: f12:
140; CHECK: lpgfr %r2, %r2
141; CHECK: br %r14
142  %ext = sext i32 %val to i64
143  %cmp = icmp slt i32 %val, 0
144  %neg = sub i64 0, %ext
145  %abs = select i1 %cmp, i64 %neg, i64 %ext
146  ret i64 %abs
147}
148