ssub_sat_plus.ll
2.75 KB
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; 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 w10, w0, w8
; CHECK-NEXT: mov w9, #2147483647
; CHECK-NEXT: cmp w10, #0 // =0
; CHECK-NEXT: cinv w9, w9, ge
; CHECK-NEXT: subs w8, w0, w8
; 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: mov x9, #9223372036854775807
; CHECK-NEXT: cmp x8, #0 // =0
; CHECK-NEXT: cinv x8, x9, ge
; CHECK-NEXT: subs x9, x0, x2
; CHECK-NEXT: csel x0, x8, x9, 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: sxth w8, w0
; CHECK-NEXT: mul w9, w1, w2
; CHECK-NEXT: mov w10, #32767
; CHECK-NEXT: sub w8, w8, w9, sxth
; CHECK-NEXT: cmp w8, w10
; CHECK-NEXT: csel w8, w8, w10, lt
; CHECK-NEXT: cmn w8, #8, lsl #12 // =32768
; CHECK-NEXT: mov w9, #-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: sxtb w8, w0
; CHECK-NEXT: mul w9, w1, w2
; CHECK-NEXT: sub w8, w8, w9, sxtb
; CHECK-NEXT: mov w10, #127
; CHECK-NEXT: cmp w8, #127 // =127
; CHECK-NEXT: csel w8, w8, w10, lt
; CHECK-NEXT: cmn w8, #128 // =128
; CHECK-NEXT: mov w9, #-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 w9, w1, w2
; CHECK-NEXT: sbfx w8, w0, #0, #4
; CHECK-NEXT: lsl w9, w9, #28
; CHECK-NEXT: sub w8, w8, w9, asr #28
; CHECK-NEXT: mov w10, #7
; CHECK-NEXT: cmp w8, #7 // =7
; CHECK-NEXT: csel w8, w8, w10, lt
; CHECK-NEXT: cmn w8, #8 // =8
; CHECK-NEXT: mov w9, #-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
}