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llvm-project/llvm/test/CodeGen/RISCV/ssub_sat.ll

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=riscv32 -mattr=+m | FileCheck %s --check-prefix=RV32I
; RUN: llc < %s -mtriple=riscv64 -mattr=+m | FileCheck %s --check-prefix=RV64I
; RUN: llc < %s -mtriple=riscv32 -mattr=+m,+experimental-zbb | FileCheck %s --check-prefix=RV32IZbb
; RUN: llc < %s -mtriple=riscv64 -mattr=+m,+experimental-zbb | FileCheck %s --check-prefix=RV64IZbb
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 signext i32 @func(i32 signext %x, i32 signext %y) nounwind {
; RV32I-LABEL: func:
; RV32I: # %bb.0:
; RV32I-NEXT: mv a2, a0
; RV32I-NEXT: sub a3, a0, a1
; RV32I-NEXT: lui a0, 524288
; RV32I-NEXT: bgez a3, .LBB0_2
; RV32I-NEXT: # %bb.1:
; RV32I-NEXT: addi a0, a0, -1
; RV32I-NEXT: .LBB0_2:
; RV32I-NEXT: sgtz a1, a1
; RV32I-NEXT: slt a2, a3, a2
; RV32I-NEXT: bne a1, a2, .LBB0_4
; RV32I-NEXT: # %bb.3:
; RV32I-NEXT: mv a0, a3
; RV32I-NEXT: .LBB0_4:
; RV32I-NEXT: ret
;
; RV64I-LABEL: func:
; RV64I: # %bb.0:
; RV64I-NEXT: sub a0, a0, a1
; RV64I-NEXT: lui a1, 524288
; RV64I-NEXT: addiw a2, a1, -1
; RV64I-NEXT: bge a0, a2, .LBB0_3
; RV64I-NEXT: # %bb.1:
; RV64I-NEXT: bge a1, a0, .LBB0_4
; RV64I-NEXT: .LBB0_2:
; RV64I-NEXT: ret
; RV64I-NEXT: .LBB0_3:
; RV64I-NEXT: mv a0, a2
; RV64I-NEXT: blt a1, a0, .LBB0_2
; RV64I-NEXT: .LBB0_4:
; RV64I-NEXT: lui a0, 524288
; RV64I-NEXT: ret
;
; RV32IZbb-LABEL: func:
; RV32IZbb: # %bb.0:
; RV32IZbb-NEXT: mv a2, a0
; RV32IZbb-NEXT: sub a3, a0, a1
; RV32IZbb-NEXT: lui a0, 524288
; RV32IZbb-NEXT: bgez a3, .LBB0_2
; RV32IZbb-NEXT: # %bb.1:
; RV32IZbb-NEXT: addi a0, a0, -1
; RV32IZbb-NEXT: .LBB0_2:
; RV32IZbb-NEXT: sgtz a1, a1
; RV32IZbb-NEXT: slt a2, a3, a2
; RV32IZbb-NEXT: bne a1, a2, .LBB0_4
; RV32IZbb-NEXT: # %bb.3:
; RV32IZbb-NEXT: mv a0, a3
; RV32IZbb-NEXT: .LBB0_4:
; RV32IZbb-NEXT: ret
;
; RV64IZbb-LABEL: func:
; RV64IZbb: # %bb.0:
; RV64IZbb-NEXT: sub a0, a0, a1
; RV64IZbb-NEXT: lui a1, 524288
; RV64IZbb-NEXT: addiw a2, a1, -1
; RV64IZbb-NEXT: min a0, a0, a2
; RV64IZbb-NEXT: max a0, a0, a1
; RV64IZbb-NEXT: ret
%tmp = call i32 @llvm.ssub.sat.i32(i32 %x, i32 %y);
ret i32 %tmp;
}
define i64 @func2(i64 %x, i64 %y) nounwind {
; RV32I-LABEL: func2:
; RV32I: # %bb.0:
; RV32I-NEXT: mv a4, a1
; RV32I-NEXT: sltu a1, a0, a2
; RV32I-NEXT: sub a5, a4, a3
; RV32I-NEXT: sub a5, a5, a1
; RV32I-NEXT: lui a1, 524288
; RV32I-NEXT: bgez a5, .LBB1_2
; RV32I-NEXT: # %bb.1:
; RV32I-NEXT: addi a1, a1, -1
; RV32I-NEXT: .LBB1_2:
; RV32I-NEXT: xor a6, a4, a5
; RV32I-NEXT: xor a3, a4, a3
; RV32I-NEXT: and a3, a3, a6
; RV32I-NEXT: bltz a3, .LBB1_4
; RV32I-NEXT: # %bb.3:
; RV32I-NEXT: sub a0, a0, a2
; RV32I-NEXT: mv a1, a5
; RV32I-NEXT: ret
; RV32I-NEXT: .LBB1_4:
; RV32I-NEXT: srai a0, a5, 31
; RV32I-NEXT: ret
;
; RV64I-LABEL: func2:
; RV64I: # %bb.0:
; RV64I-NEXT: mv a2, a0
; RV64I-NEXT: sub a3, a0, a1
; RV64I-NEXT: addi a0, zero, -1
; RV64I-NEXT: slli a0, a0, 63
; RV64I-NEXT: bgez a3, .LBB1_2
; RV64I-NEXT: # %bb.1:
; RV64I-NEXT: addi a0, a0, -1
; RV64I-NEXT: .LBB1_2:
; RV64I-NEXT: sgtz a1, a1
; RV64I-NEXT: slt a2, a3, a2
; RV64I-NEXT: bne a1, a2, .LBB1_4
; RV64I-NEXT: # %bb.3:
; RV64I-NEXT: mv a0, a3
; RV64I-NEXT: .LBB1_4:
; RV64I-NEXT: ret
;
; RV32IZbb-LABEL: func2:
; RV32IZbb: # %bb.0:
; RV32IZbb-NEXT: mv a4, a1
; RV32IZbb-NEXT: sltu a1, a0, a2
; RV32IZbb-NEXT: sub a5, a4, a3
; RV32IZbb-NEXT: sub a5, a5, a1
; RV32IZbb-NEXT: lui a1, 524288
; RV32IZbb-NEXT: bgez a5, .LBB1_2
; RV32IZbb-NEXT: # %bb.1:
; RV32IZbb-NEXT: addi a1, a1, -1
; RV32IZbb-NEXT: .LBB1_2:
; RV32IZbb-NEXT: xor a6, a4, a5
; RV32IZbb-NEXT: xor a3, a4, a3
; RV32IZbb-NEXT: and a3, a3, a6
; RV32IZbb-NEXT: bltz a3, .LBB1_4
; RV32IZbb-NEXT: # %bb.3:
; RV32IZbb-NEXT: sub a0, a0, a2
; RV32IZbb-NEXT: mv a1, a5
; RV32IZbb-NEXT: ret
; RV32IZbb-NEXT: .LBB1_4:
; RV32IZbb-NEXT: srai a0, a5, 31
; RV32IZbb-NEXT: ret
;
; RV64IZbb-LABEL: func2:
; RV64IZbb: # %bb.0:
; RV64IZbb-NEXT: mv a2, a0
; RV64IZbb-NEXT: sub a3, a0, a1
; RV64IZbb-NEXT: addi a0, zero, -1
; RV64IZbb-NEXT: slli a0, a0, 63
; RV64IZbb-NEXT: bgez a3, .LBB1_2
; RV64IZbb-NEXT: # %bb.1:
; RV64IZbb-NEXT: addi a0, a0, -1
; RV64IZbb-NEXT: .LBB1_2:
; RV64IZbb-NEXT: sgtz a1, a1
; RV64IZbb-NEXT: slt a2, a3, a2
; RV64IZbb-NEXT: bne a1, a2, .LBB1_4
; RV64IZbb-NEXT: # %bb.3:
; RV64IZbb-NEXT: mv a0, a3
; RV64IZbb-NEXT: .LBB1_4:
; RV64IZbb-NEXT: ret
%tmp = call i64 @llvm.ssub.sat.i64(i64 %x, i64 %y);
ret i64 %tmp;
}
define signext i16 @func16(i16 signext %x, i16 signext %y) nounwind {
; RV32I-LABEL: func16:
; RV32I: # %bb.0:
; RV32I-NEXT: sub a0, a0, a1
; RV32I-NEXT: lui a1, 8
; RV32I-NEXT: addi a1, a1, -1
; RV32I-NEXT: bge a0, a1, .LBB2_3
; RV32I-NEXT: # %bb.1:
; RV32I-NEXT: lui a1, 1048568
; RV32I-NEXT: bge a1, a0, .LBB2_4
; RV32I-NEXT: .LBB2_2:
; RV32I-NEXT: ret
; RV32I-NEXT: .LBB2_3:
; RV32I-NEXT: mv a0, a1
; RV32I-NEXT: lui a1, 1048568
; RV32I-NEXT: blt a1, a0, .LBB2_2
; RV32I-NEXT: .LBB2_4:
; RV32I-NEXT: lui a0, 1048568
; RV32I-NEXT: ret
;
; RV64I-LABEL: func16:
; RV64I: # %bb.0:
; RV64I-NEXT: sub a0, a0, a1
; RV64I-NEXT: lui a1, 8
; RV64I-NEXT: addiw a1, a1, -1
; RV64I-NEXT: bge a0, a1, .LBB2_3
; RV64I-NEXT: # %bb.1:
; RV64I-NEXT: lui a1, 1048568
; RV64I-NEXT: bge a1, a0, .LBB2_4
; RV64I-NEXT: .LBB2_2:
; RV64I-NEXT: ret
; RV64I-NEXT: .LBB2_3:
; RV64I-NEXT: mv a0, a1
; RV64I-NEXT: lui a1, 1048568
; RV64I-NEXT: blt a1, a0, .LBB2_2
; RV64I-NEXT: .LBB2_4:
; RV64I-NEXT: lui a0, 1048568
; RV64I-NEXT: ret
;
; RV32IZbb-LABEL: func16:
; RV32IZbb: # %bb.0:
; RV32IZbb-NEXT: sub a0, a0, a1
; RV32IZbb-NEXT: lui a1, 8
; RV32IZbb-NEXT: addi a1, a1, -1
; RV32IZbb-NEXT: min a0, a0, a1
; RV32IZbb-NEXT: lui a1, 1048568
; RV32IZbb-NEXT: max a0, a0, a1
; RV32IZbb-NEXT: ret
;
; RV64IZbb-LABEL: func16:
; RV64IZbb: # %bb.0:
; RV64IZbb-NEXT: sub a0, a0, a1
; RV64IZbb-NEXT: lui a1, 8
; RV64IZbb-NEXT: addiw a1, a1, -1
; RV64IZbb-NEXT: min a0, a0, a1
; RV64IZbb-NEXT: lui a1, 1048568
; RV64IZbb-NEXT: max a0, a0, a1
; RV64IZbb-NEXT: ret
%tmp = call i16 @llvm.ssub.sat.i16(i16 %x, i16 %y);
ret i16 %tmp;
}
define signext i8 @func8(i8 signext %x, i8 signext %y) nounwind {
; RV32I-LABEL: func8:
; RV32I: # %bb.0:
; RV32I-NEXT: sub a0, a0, a1
; RV32I-NEXT: addi a1, zero, 127
; RV32I-NEXT: bge a0, a1, .LBB3_3
; RV32I-NEXT: # %bb.1:
; RV32I-NEXT: addi a1, zero, -128
; RV32I-NEXT: bge a1, a0, .LBB3_4
; RV32I-NEXT: .LBB3_2:
; RV32I-NEXT: ret
; RV32I-NEXT: .LBB3_3:
; RV32I-NEXT: addi a0, zero, 127
; RV32I-NEXT: addi a1, zero, -128
; RV32I-NEXT: blt a1, a0, .LBB3_2
; RV32I-NEXT: .LBB3_4:
; RV32I-NEXT: addi a0, zero, -128
; RV32I-NEXT: ret
;
; RV64I-LABEL: func8:
; RV64I: # %bb.0:
; RV64I-NEXT: sub a0, a0, a1
; RV64I-NEXT: addi a1, zero, 127
; RV64I-NEXT: bge a0, a1, .LBB3_3
; RV64I-NEXT: # %bb.1:
; RV64I-NEXT: addi a1, zero, -128
; RV64I-NEXT: bge a1, a0, .LBB3_4
; RV64I-NEXT: .LBB3_2:
; RV64I-NEXT: ret
; RV64I-NEXT: .LBB3_3:
; RV64I-NEXT: addi a0, zero, 127
; RV64I-NEXT: addi a1, zero, -128
; RV64I-NEXT: blt a1, a0, .LBB3_2
; RV64I-NEXT: .LBB3_4:
; RV64I-NEXT: addi a0, zero, -128
; RV64I-NEXT: ret
;
; RV32IZbb-LABEL: func8:
; RV32IZbb: # %bb.0:
; RV32IZbb-NEXT: sub a0, a0, a1
; RV32IZbb-NEXT: addi a1, zero, 127
; RV32IZbb-NEXT: min a0, a0, a1
; RV32IZbb-NEXT: addi a1, zero, -128
; RV32IZbb-NEXT: max a0, a0, a1
; RV32IZbb-NEXT: ret
;
; RV64IZbb-LABEL: func8:
; RV64IZbb: # %bb.0:
; RV64IZbb-NEXT: sub a0, a0, a1
; RV64IZbb-NEXT: addi a1, zero, 127
; RV64IZbb-NEXT: min a0, a0, a1
; RV64IZbb-NEXT: addi a1, zero, -128
; RV64IZbb-NEXT: max a0, a0, a1
; RV64IZbb-NEXT: ret
%tmp = call i8 @llvm.ssub.sat.i8(i8 %x, i8 %y);
ret i8 %tmp;
}
define signext i4 @func3(i4 signext %x, i4 signext %y) nounwind {
; RV32I-LABEL: func3:
; RV32I: # %bb.0:
; RV32I-NEXT: sub a0, a0, a1
; RV32I-NEXT: addi a1, zero, 7
; RV32I-NEXT: bge a0, a1, .LBB4_3
; RV32I-NEXT: # %bb.1:
; RV32I-NEXT: addi a1, zero, -8
; RV32I-NEXT: bge a1, a0, .LBB4_4
; RV32I-NEXT: .LBB4_2:
; RV32I-NEXT: ret
; RV32I-NEXT: .LBB4_3:
; RV32I-NEXT: addi a0, zero, 7
; RV32I-NEXT: addi a1, zero, -8
; RV32I-NEXT: blt a1, a0, .LBB4_2
; RV32I-NEXT: .LBB4_4:
; RV32I-NEXT: addi a0, zero, -8
; RV32I-NEXT: ret
;
; RV64I-LABEL: func3:
; RV64I: # %bb.0:
; RV64I-NEXT: sub a0, a0, a1
; RV64I-NEXT: addi a1, zero, 7
; RV64I-NEXT: bge a0, a1, .LBB4_3
; RV64I-NEXT: # %bb.1:
; RV64I-NEXT: addi a1, zero, -8
; RV64I-NEXT: bge a1, a0, .LBB4_4
; RV64I-NEXT: .LBB4_2:
; RV64I-NEXT: ret
; RV64I-NEXT: .LBB4_3:
; RV64I-NEXT: addi a0, zero, 7
; RV64I-NEXT: addi a1, zero, -8
; RV64I-NEXT: blt a1, a0, .LBB4_2
; RV64I-NEXT: .LBB4_4:
; RV64I-NEXT: addi a0, zero, -8
; RV64I-NEXT: ret
;
; RV32IZbb-LABEL: func3:
; RV32IZbb: # %bb.0:
; RV32IZbb-NEXT: sub a0, a0, a1
; RV32IZbb-NEXT: addi a1, zero, 7
; RV32IZbb-NEXT: min a0, a0, a1
; RV32IZbb-NEXT: addi a1, zero, -8
; RV32IZbb-NEXT: max a0, a0, a1
; RV32IZbb-NEXT: ret
;
; RV64IZbb-LABEL: func3:
; RV64IZbb: # %bb.0:
; RV64IZbb-NEXT: sub a0, a0, a1
; RV64IZbb-NEXT: addi a1, zero, 7
; RV64IZbb-NEXT: min a0, a0, a1
; RV64IZbb-NEXT: addi a1, zero, -8
; RV64IZbb-NEXT: max a0, a0, a1
; RV64IZbb-NEXT: ret
%tmp = call i4 @llvm.ssub.sat.i4(i4 %x, i4 %y);
ret i4 %tmp;
}
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