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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.
#include "sysdeps.h"
// Signed division
FUNCTION(__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 GLOB(__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
ENDFUNCTION(__i64_sdiv)
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