1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2; RUN: llc -mtriple=arm-eabi %s -o - | FileCheck %s
3; RUN: llc -mtriple=armv6m-eabi %s -o - | FileCheck %s --check-prefix=EXPAND
4
5define i64 @test_shl(i64 %val, i64 %amt) {
6; CHECK-LABEL: test_shl:
7; CHECK:       @ %bb.0:
8; CHECK-NEXT:    rsb r3, r2, #32
9; CHECK-NEXT:    lsr r3, r0, r3
10; CHECK-NEXT:    orr r1, r3, r1, lsl r2
11; CHECK-NEXT:    subs r3, r2, #32
12; CHECK-NEXT:    lslpl r1, r0, r3
13; CHECK-NEXT:    lsl r0, r0, r2
14; CHECK-NEXT:    movpl r0, #0
15; CHECK-NEXT:    mov pc, lr
16;
17; EXPAND-LABEL: test_shl:
18; EXPAND:       @ %bb.0:
19; EXPAND-NEXT:    .save {r7, lr}
20; EXPAND-NEXT:    push {r7, lr}
21; EXPAND-NEXT:    bl __aeabi_llsl
22; EXPAND-NEXT:    pop {r7, pc}
23  %res = shl i64 %val, %amt
24  ret i64 %res
25}
26
27; Explanation for lshr is pretty much the reverse of shl.
28define i64 @test_lshr(i64 %val, i64 %amt) {
29; CHECK-LABEL: test_lshr:
30; CHECK:       @ %bb.0:
31; CHECK-NEXT:    rsb r3, r2, #32
32; CHECK-NEXT:    lsr r0, r0, r2
33; CHECK-NEXT:    orr r0, r0, r1, lsl r3
34; CHECK-NEXT:    subs r3, r2, #32
35; CHECK-NEXT:    lsrpl r0, r1, r3
36; CHECK-NEXT:    lsr r1, r1, r2
37; CHECK-NEXT:    movpl r1, #0
38; CHECK-NEXT:    mov pc, lr
39;
40; EXPAND-LABEL: test_lshr:
41; EXPAND:       @ %bb.0:
42; EXPAND-NEXT:    .save {r7, lr}
43; EXPAND-NEXT:    push {r7, lr}
44; EXPAND-NEXT:    bl __aeabi_llsr
45; EXPAND-NEXT:    pop {r7, pc}
46  %res = lshr i64 %val, %amt
47  ret i64 %res
48}
49
50; One minor difference for ashr: the high bits must be "hi >> 31" if the shift
51; amount is large to get the right sign bit.
52define i64 @test_ashr(i64 %val, i64 %amt) {
53; CHECK-LABEL: test_ashr:
54; CHECK:       @ %bb.0:
55; CHECK-NEXT:    asr r3, r1, r2
56; CHECK-NEXT:    subs r12, r2, #32
57; CHECK-NEXT:    lsr r0, r0, r2
58; CHECK-NEXT:    rsb r2, r2, #32
59; CHECK-NEXT:    asrpl r3, r1, #31
60; CHECK-NEXT:    orr r0, r0, r1, lsl r2
61; CHECK-NEXT:    asrpl r0, r1, r12
62; CHECK-NEXT:    mov r1, r3
63; CHECK-NEXT:    mov pc, lr
64;
65; EXPAND-LABEL: test_ashr:
66; EXPAND:       @ %bb.0:
67; EXPAND-NEXT:    .save {r7, lr}
68; EXPAND-NEXT:    push {r7, lr}
69; EXPAND-NEXT:    bl __aeabi_lasr
70; EXPAND-NEXT:    pop {r7, pc}
71  %res = ashr i64 %val, %amt
72  ret i64 %res
73}
74