1; RUN: llc -mtriple=aarch64-eabi %s -o - | FileCheck %s
2
3; These tests just check that the plumbing is in place for @llvm.bitreverse.
4
5declare <2 x i16> @llvm.bitreverse.v2i16(<2 x i16>) readnone
6
7define <2 x i16> @f(<2 x i16> %a) {
8; CHECK-LABEL: f:
9; CHECK: fmov [[REG1:w[0-9]+]], s0
10; CHECK-DAG: rbit [[REG2:w[0-9]+]], [[REG1]]
11; CHECK-DAG: fmov s0, [[REG2]]
12; CHECK-DAG: mov [[REG3:w[0-9]+]], v0.s[1]
13; CHECK-DAG: rbit [[REG4:w[0-9]+]], [[REG3]]
14; CHECK-DAG: mov v0.s[1], [[REG4]]
15; CHECK-DAG: ushr v0.2s, v0.2s, #16
16  %b = call <2 x i16> @llvm.bitreverse.v2i16(<2 x i16> %a)
17  ret <2 x i16> %b
18}
19
20declare i8 @llvm.bitreverse.i8(i8) readnone
21
22define i8 @g(i8 %a) {
23; CHECK-LABEL: g:
24; CHECK: rbit [[REG:w[0-9]+]], w0
25; CHECK-NEXT: lsr w0, [[REG]], #24
26; CHECK-NEXT: ret
27  %b = call i8 @llvm.bitreverse.i8(i8 %a)
28  ret i8 %b
29}
30
31declare <8 x i8> @llvm.bitreverse.v8i8(<8 x i8>) readnone
32
33define <8 x i8> @g_vec(<8 x i8> %a) {
34; CHECK-DAG: movi [[M1:v.*]], #15
35; CHECK-DAG: movi [[M2:v.*]], #240
36; CHECK:     and  [[A1:v.*]], v0.8b, [[M1]]
37; CHECK:     and  [[A2:v.*]], v0.8b, [[M2]]
38; CHECK-DAG: shl  [[L4:v.*]], [[A1]], #4
39; CHECK-DAG: ushr [[R4:v.*]], [[A2]], #4
40; CHECK-DAG: orr  [[V4:v.*]], [[R4]], [[L4]]
41
42; CHECK-DAG: movi [[M3:v.*]], #51
43; CHECK-DAG: movi [[M4:v.*]], #204
44; CHECK:     and  [[A3:v.*]], [[V4]], [[M3]]
45; CHECK:     and  [[A4:v.*]], [[V4]], [[M4]]
46; CHECK-DAG: shl  [[L2:v.*]], [[A3]], #2
47; CHECK-DAG: ushr [[R2:v.*]], [[A4]], #2
48; CHECK-DAG: orr  [[V2:v.*]], [[R2]], [[L2]]
49
50; CHECK-DAG: movi [[M5:v.*]], #85
51; CHECK-DAG: movi [[M6:v.*]], #170
52; CHECK:     and  [[A5:v.*]], [[V2]], [[M5]]
53; CHECK:     and  [[A6:v.*]], [[V2]], [[M6]]
54; CHECK-DAG: shl  [[L1:v.*]], [[A5]], #1
55; CHECK-DAG: ushr [[R1:v.*]], [[A6]], #1
56; CHECK:     orr  [[V1:v.*]], [[R1]], [[L1]]
57
58; CHECK:     ret
59  %b = call <8 x i8> @llvm.bitreverse.v8i8(<8 x i8> %a)
60  ret <8 x i8> %b
61}
62