| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=aarch64-- | FileCheck %s |
| |
| declare i4 @llvm.ssub.sat.i4(i4, i4) |
| declare i8 @llvm.ssub.sat.i8(i8, i8) |
| declare i16 @llvm.ssub.sat.i16(i16, i16) |
| declare i32 @llvm.ssub.sat.i32(i32, i32) |
| declare i64 @llvm.ssub.sat.i64(i64, i64) |
| |
| define i32 @func32(i32 %x, i32 %y, i32 %z) nounwind { |
| ; CHECK-LABEL: func32: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: mul w8, w1, w2 |
| ; CHECK-NEXT: subs w8, w0, w8 |
| ; CHECK-NEXT: asr w9, w8, #31 |
| ; CHECK-NEXT: eor w9, w9, #0x80000000 |
| ; CHECK-NEXT: csel w0, w9, w8, vs |
| ; CHECK-NEXT: ret |
| %a = mul i32 %y, %z |
| %tmp = call i32 @llvm.ssub.sat.i32(i32 %x, i32 %a) |
| ret i32 %tmp |
| } |
| |
| define i64 @func64(i64 %x, i64 %y, i64 %z) nounwind { |
| ; CHECK-LABEL: func64: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: subs x8, x0, x2 |
| ; CHECK-NEXT: asr x9, x8, #63 |
| ; CHECK-NEXT: eor x9, x9, #0x8000000000000000 |
| ; CHECK-NEXT: csel x0, x9, x8, vs |
| ; CHECK-NEXT: ret |
| %a = mul i64 %y, %z |
| %tmp = call i64 @llvm.ssub.sat.i64(i64 %x, i64 %z) |
| ret i64 %tmp |
| } |
| |
| define i16 @func16(i16 %x, i16 %y, i16 %z) nounwind { |
| ; CHECK-LABEL: func16: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: mul w8, w1, w2 |
| ; CHECK-NEXT: sxth w9, w0 |
| ; CHECK-NEXT: sub w8, w9, w8, sxth |
| ; CHECK-NEXT: mov w9, #32767 // =0x7fff |
| ; CHECK-NEXT: cmp w8, w9 |
| ; CHECK-NEXT: csel w8, w8, w9, lt |
| ; CHECK-NEXT: mov w9, #-32768 // =0xffff8000 |
| ; CHECK-NEXT: cmn w8, #8, lsl #12 // =32768 |
| ; CHECK-NEXT: csel w0, w8, w9, gt |
| ; CHECK-NEXT: ret |
| %a = mul i16 %y, %z |
| %tmp = call i16 @llvm.ssub.sat.i16(i16 %x, i16 %a) |
| ret i16 %tmp |
| } |
| |
| define i8 @func8(i8 %x, i8 %y, i8 %z) nounwind { |
| ; CHECK-LABEL: func8: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: mul w8, w1, w2 |
| ; CHECK-NEXT: sxtb w9, w0 |
| ; CHECK-NEXT: sub w8, w9, w8, sxtb |
| ; CHECK-NEXT: mov w9, #127 // =0x7f |
| ; CHECK-NEXT: cmp w8, #127 |
| ; CHECK-NEXT: csel w8, w8, w9, lt |
| ; CHECK-NEXT: mov w9, #-128 // =0xffffff80 |
| ; CHECK-NEXT: cmn w8, #128 |
| ; CHECK-NEXT: csel w0, w8, w9, gt |
| ; CHECK-NEXT: ret |
| %a = mul i8 %y, %z |
| %tmp = call i8 @llvm.ssub.sat.i8(i8 %x, i8 %a) |
| ret i8 %tmp |
| } |
| |
| define i4 @func4(i4 %x, i4 %y, i4 %z) nounwind { |
| ; CHECK-LABEL: func4: |
| ; CHECK: // %bb.0: |
| ; CHECK-NEXT: mul w8, w1, w2 |
| ; CHECK-NEXT: sbfx w9, w0, #0, #4 |
| ; CHECK-NEXT: lsl w8, w8, #28 |
| ; CHECK-NEXT: sub w8, w9, w8, asr #28 |
| ; CHECK-NEXT: mov w9, #7 // =0x7 |
| ; CHECK-NEXT: cmp w8, #7 |
| ; CHECK-NEXT: csel w8, w8, w9, lt |
| ; CHECK-NEXT: mov w9, #-8 // =0xfffffff8 |
| ; CHECK-NEXT: cmn w8, #8 |
| ; CHECK-NEXT: csel w0, w8, w9, gt |
| ; CHECK-NEXT: ret |
| %a = mul i4 %y, %z |
| %tmp = call i4 @llvm.ssub.sat.i4(i4 %x, i4 %a) |
| ret i4 %tmp |
| } |