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# *****************************************************************
#
# The Compcert verified compiler
#
# Xavier Leroy, INRIA Paris-Rocquencourt
#
# Copyright (c) 2013 Institut National de Recherche en Informatique et
# en Automatique.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the <organization> nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT
# HOLDER> BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# *********************************************************************
# Helper functions for 64-bit integer arithmetic. IA32 version.
.text
# Signed division
.globl __i64_sdiv
.balign 16
__i64_sdiv:
pushl %ebp
pushl %esi
pushl %edi
movl 20(%esp), %esi # esi = NH
movl %esi, %ebp # save sign of N in ebp
testl %esi, %esi
jge 1f # if N < 0,
negl 16(%esp) # N = -N
adcl $0, %esi
negl %esi
movl %esi, 20(%esp)
1: movl 28(%esp), %esi # esi = DH
xorl %esi, %ebp # sign of result in ebp
testl %esi, %esi
jge 2f # if D < 0,
negl 24(%esp) # D = -D
adcl $0, %esi
negl %esi
movl %esi, 28(%esp)
2: call __i64_udivmod
testl %ebp, %ebp # apply sign to result
jge 3f
negl %esi
adcl $0, %edi
negl %edi
3: movl %esi, %eax
movl %edi, %edx
popl %edi
popl %esi
popl %ebp
ret
.type __i64_sdiv, @function
.size __i64_sdiv, . - __i64_sdiv
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