# ***************************************************************** # # 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 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 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