1 ; RUN: llc -mtriple=aarch64-eabi %s -o - | FileCheck %s
3 ; These tests just check that the plumbing is in place for @llvm.bitreverse.
5 declare <2 x i16> @llvm.bitreverse.v2i16(<2 x i16>) readnone
7 define <2 x i16> @f(<2 x i16> %a) {
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)
20 declare i8 @llvm.bitreverse.i8(i8) readnone
24 ; CHECK: rbit [[REG:w[0-9]+]], w0
25 ; CHECK-NEXT: lsr w0, [[REG]], #24
27 %b = call i8 @llvm.bitreverse.i8(i8 %a)
31 declare <8 x i8> @llvm.bitreverse.v8i8(<8 x i8>) readnone
33 define <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]]
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]]
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]]
59 %b = call <8 x i8> @llvm.bitreverse.v8i8(<8 x i8> %a)