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