1; Test 64-bit atomic subtractions, z196 version.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
4
5; Check addition of a variable.
6define i64 @f1(i64 %dummy, i64 *%src, i64 %b) {
7; CHECK-LABEL: f1:
8; CHECK: lcgr [[NEG:%r[0-5]]], %r4
9; CHECK: laag %r2, [[NEG]], 0(%r3)
10; CHECK: br %r14
11  %res = atomicrmw sub i64 *%src, i64 %b seq_cst
12  ret i64 %res
13}
14
15; Check addition of 1, which needs a temporary.
16define i64 @f2(i64 %dummy, i64 *%src) {
17; CHECK-LABEL: f2:
18; CHECK: lghi [[TMP:%r[0-5]]], -1
19; CHECK: laag %r2, [[TMP]], 0(%r3)
20; CHECK: br %r14
21  %res = atomicrmw sub i64 *%src, i64 1 seq_cst
22  ret i64 %res
23}
24
25; Check the high end of the LAAG range.
26define i64 @f3(i64 %dummy, i64 *%src, i64 %b) {
27; CHECK-LABEL: f3:
28; CHECK: lcgr [[NEG:%r[0-5]]], %r4
29; CHECK: laag %r2, [[NEG]], 524280(%r3)
30; CHECK: br %r14
31  %ptr = getelementptr i64, i64 *%src, i64 65535
32  %res = atomicrmw sub i64 *%ptr, i64 %b seq_cst
33  ret i64 %res
34}
35
36; Check the next doubleword up, which needs separate address logic.
37define i64 @f4(i64 %dummy, i64 *%src, i64 %b) {
38; CHECK-LABEL: f4:
39; CHECK-DAG: lcgr [[NEG:%r[0-5]]], %r4
40; CHECK-DAG: agfi %r3, 524288
41; CHECK: laag %r2, [[NEG]], 0(%r3)
42; CHECK: br %r14
43  %ptr = getelementptr i64, i64 *%src, i64 65536
44  %res = atomicrmw sub i64 *%ptr, i64 %b seq_cst
45  ret i64 %res
46}
47
48; Check the low end of the LAAG range.
49define i64 @f5(i64 %dummy, i64 *%src, i64 %b) {
50; CHECK-LABEL: f5:
51; CHECK: lcgr [[NEG:%r[0-5]]], %r4
52; CHECK: laag %r2, [[NEG]], -524288(%r3)
53; CHECK: br %r14
54  %ptr = getelementptr i64, i64 *%src, i64 -65536
55  %res = atomicrmw sub i64 *%ptr, i64 %b seq_cst
56  ret i64 %res
57}
58
59; Check the next doubleword down, which needs separate address logic.
60define i64 @f6(i64 %dummy, i64 *%src, i64 %b) {
61; CHECK-LABEL: f6:
62; CHECK-DAG: lcgr [[NEG:%r[0-5]]], %r4
63; CHECK-DAG: agfi %r3, -524296
64; CHECK: laag %r2, [[NEG]], 0(%r3)
65; CHECK: br %r14
66  %ptr = getelementptr i64, i64 *%src, i64 -65537
67  %res = atomicrmw sub i64 *%ptr, i64 %b seq_cst
68  ret i64 %res
69}
70