1; Test that divisions by constants are implemented as multiplications.
2;
3; RUN: llc < %s -mtriple=s390x-linux-gnu -asm-verbose=0 | FileCheck %s
4
5; Check signed 32-bit division.
6define i32 @f1(i32 %a) {
7; CHECK-LABEL: f1:
8; CHECK: lgfr [[REG:%r[0-5]]], %r2
9; CHECK: msgfi [[REG]], 502748801
10; CHECK-DAG: srlg [[RES1:%r[0-5]]], [[REG]], 63
11; CHECK-DAG: srag %r2, [[REG]], 46
12; CHECK: ar %r2, [[RES1]]
13; CHECK: br %r14
14  %b = sdiv i32 %a, 139968
15  ret i32 %b
16}
17
18; Check unsigned 32-bit division.
19define i32 @f2(i32 %a) {
20; CHECK-LABEL: f2:
21; CHECK: llgfr [[REG:%r[0-5]]], %r2
22; CHECK: msgfi [[REG]], 502748801
23; CHECK: srlg %r2, [[REG]], 46
24; CHECK: br %r14
25  %b = udiv i32 %a, 139968
26  ret i32 %b
27}
28
29; Check signed 64-bit division.
30define i64 @f3(i64 %dummy, i64 %a) {
31; CHECK-LABEL: f3:
32; CHECK-DAG: llihf [[CONST:%r[0-5]]], 1005497601
33; CHECK-DAG: oilf [[CONST]], 4251762321
34; CHECK-DAG: srag [[REG:%r[0-5]]], %r3, 63
35; CHECK-DAG: ngr [[REG]], [[CONST]]
36; CHECK-DAG: mlgr %r2, [[CONST]]
37; CHECK: sgr %r2, [[REG]]
38; CHECK: srlg [[RES1:%r[0-5]]], %r2, 63
39; CHECK: srag %r2, %r2, 15
40; CHECK: agr %r2, [[RES1]]
41; CHECK: br %r14
42  %b = sdiv i64 %a, 139968
43  ret i64 %b
44}
45
46; Check unsigned 64-bit division.
47define i64 @f4(i64 %dummy, i64 %a) {
48; CHECK-LABEL: f4:
49; CHECK: llihf [[CONST:%r[0-5]]], 1005497601
50; CHECK: oilf [[CONST]], 4251762321
51; CHECK: mlgr %r2, [[CONST]]
52; CHECK: srlg %r2, %r2, 15
53; CHECK: br %r14
54  %b = udiv i64 %a, 139968
55  ret i64 %b
56}
57