llvm/test/CodeGen/X86/iabs.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown-unknown | FileCheck %s --check-prefix=X86 --check-prefix=X86-NO-CMOV
; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+cmov | FileCheck %s --check-prefix=X86 --check-prefix=X86-CMOV
; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=X64

;; Integer absolute value, should produce something at least as good as:
;;       movl   %edi, %eax
;;       negl   %eax
;;       cmovll %edi, %eax
;;       ret
; rdar://10695237
define i8 @test_i8(i8 %a) nounwind {
; X86-LABEL: test_i8:
; X86:       # %bb.0:
; X86-NEXT:    movzbl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    movl %eax, %ecx
; X86-NEXT:    sarb $7, %cl
; X86-NEXT:    xorb %cl, %al
; X86-NEXT:    subb %cl, %al
; X86-NEXT:    retl
;
; X64-LABEL: test_i8:
; X64:       # %bb.0:
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    movl %eax, %ecx
; X64-NEXT:    sarb $7, %cl
; X64-NEXT:    xorb %cl, %al
; X64-NEXT:    subb %cl, %al
; X64-NEXT:    # kill: def $al killed $al killed $eax
; X64-NEXT:    retq
  %tmp1neg = sub i8 0, %a
  %b = icmp sgt i8 %a, -1
  %abs = select i1 %b, i8 %a, i8 %tmp1neg
  ret i8 %abs
}

define i16 @test_i16(i16 %a) nounwind {
; X86-NO-CMOV-LABEL: test_i16:
; X86-NO-CMOV:       # %bb.0:
; X86-NO-CMOV-NEXT:    movzwl {{[0-9]+}}(%esp), %eax
; X86-NO-CMOV-NEXT:    movswl %ax, %ecx
; X86-NO-CMOV-NEXT:    sarl $15, %ecx
; X86-NO-CMOV-NEXT:    xorl %ecx, %eax
; X86-NO-CMOV-NEXT:    subl %ecx, %eax
; X86-NO-CMOV-NEXT:    # kill: def $ax killed $ax killed $eax
; X86-NO-CMOV-NEXT:    retl
;
; X86-CMOV-LABEL: test_i16:
; X86-CMOV:       # %bb.0:
; X86-CMOV-NEXT:    movzwl {{[0-9]+}}(%esp), %ecx
; X86-CMOV-NEXT:    movl %ecx, %eax
; X86-CMOV-NEXT:    negw %ax
; X86-CMOV-NEXT:    cmovsw %cx, %ax
; X86-CMOV-NEXT:    retl
;
; X64-LABEL: test_i16:
; X64:       # %bb.0:
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    negw %ax
; X64-NEXT:    cmovsw %di, %ax
; X64-NEXT:    retq
  %tmp1neg = sub i16 0, %a
  %b = icmp sgt i16 %a, -1
  %abs = select i1 %b, i16 %a, i16 %tmp1neg
  ret i16 %abs
}

define i32 @test_i32(i32 %a) nounwind {
; X86-NO-CMOV-LABEL: test_i32:
; X86-NO-CMOV:       # %bb.0:
; X86-NO-CMOV-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NO-CMOV-NEXT:    movl %eax, %ecx
; X86-NO-CMOV-NEXT:    sarl $31, %ecx
; X86-NO-CMOV-NEXT:    xorl %ecx, %eax
; X86-NO-CMOV-NEXT:    subl %ecx, %eax
; X86-NO-CMOV-NEXT:    retl
;
; X86-CMOV-LABEL: test_i32:
; X86-CMOV:       # %bb.0:
; X86-CMOV-NEXT:    movl {{[0-9]+}}(%esp), %ecx
; X86-CMOV-NEXT:    movl %ecx, %eax
; X86-CMOV-NEXT:    negl %eax
; X86-CMOV-NEXT:    cmovsl %ecx, %eax
; X86-CMOV-NEXT:    retl
;
; X64-LABEL: test_i32:
; X64:       # %bb.0:
; X64-NEXT:    movl %edi, %eax
; X64-NEXT:    negl %eax
; X64-NEXT:    cmovsl %edi, %eax
; X64-NEXT:    retq
  %tmp1neg = sub i32 0, %a
  %b = icmp sgt i32 %a, -1
  %abs = select i1 %b, i32 %a, i32 %tmp1neg
  ret i32 %abs
}

define i64 @test_i64(i64 %a) nounwind {
; X86-LABEL: test_i64:
; X86:       # %bb.0:
; X86-NEXT:    movl {{[0-9]+}}(%esp), %edx
; X86-NEXT:    movl %edx, %ecx
; X86-NEXT:    sarl $31, %ecx
; X86-NEXT:    xorl %ecx, %edx
; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
; X86-NEXT:    xorl %ecx, %eax
; X86-NEXT:    subl %ecx, %eax
; X86-NEXT:    sbbl %ecx, %edx
; X86-NEXT:    retl
;
; X64-LABEL: test_i64:
; X64:       # %bb.0:
; X64-NEXT:    movq %rdi, %rax
; X64-NEXT:    negq %rax
; X64-NEXT:    cmovsq %rdi, %rax
; X64-NEXT:    retq
  %tmp1neg = sub i64 0, %a
  %b = icmp sgt i64 %a, -1
  %abs = select i1 %b, i64 %a, i64 %tmp1neg
  ret i64 %abs
}

define i128 @test_i128(i128 %a) nounwind {
; X86-LABEL: test_i128:
; X86:       # %bb.0:
; X86-NEXT:    pushl %ebp
; X86-NEXT:    movl %esp, %ebp
; X86-NEXT:    pushl %edi
; X86-NEXT:    pushl %esi
; X86-NEXT:    andl $-16, %esp
; X86-NEXT:    movl 36(%ebp), %ecx
; X86-NEXT:    movl %ecx, %eax
; X86-NEXT:    sarl $31, %eax
; X86-NEXT:    xorl %eax, %ecx
; X86-NEXT:    movl 32(%ebp), %edx
; X86-NEXT:    xorl %eax, %edx
; X86-NEXT:    movl 28(%ebp), %esi
; X86-NEXT:    xorl %eax, %esi
; X86-NEXT:    movl 24(%ebp), %edi
; X86-NEXT:    xorl %eax, %edi
; X86-NEXT:    subl %eax, %edi
; X86-NEXT:    sbbl %eax, %esi
; X86-NEXT:    sbbl %eax, %edx
; X86-NEXT:    sbbl %eax, %ecx
; X86-NEXT:    movl 8(%ebp), %eax
; X86-NEXT:    movl %edi, (%eax)
; X86-NEXT:    movl %esi, 4(%eax)
; X86-NEXT:    movl %edx, 8(%eax)
; X86-NEXT:    movl %ecx, 12(%eax)
; X86-NEXT:    leal -8(%ebp), %esp
; X86-NEXT:    popl %esi
; X86-NEXT:    popl %edi
; X86-NEXT:    popl %ebp
; X86-NEXT:    retl $4
;
; X64-LABEL: test_i128:
; X64:       # %bb.0:
; X64-NEXT:    movq %rsi, %rdx
; X64-NEXT:    movq %rdi, %rax
; X64-NEXT:    movq %rsi, %rcx
; X64-NEXT:    sarq $63, %rcx
; X64-NEXT:    xorq %rcx, %rdx
; X64-NEXT:    xorq %rcx, %rax
; X64-NEXT:    subq %rcx, %rax
; X64-NEXT:    sbbq %rcx, %rdx
; X64-NEXT:    retq
  %tmp1neg = sub i128 0, %a
  %b = icmp sgt i128 %a, -1
  %abs = select i1 %b, i128 %a, i128 %tmp1neg
  ret i128 %abs
}