_divdi3.s revision 9a70fc3be3b1e966bf78825cdb8d509963a6f0a1
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
.file "_divdi3.s"
#include <SYS.h>
/*
* C support for 64-bit modulo and division.
* GNU routines callable from C (though generated by the compiler).
* Hand-customized compiler output - see comments for details.
*/
#if defined(__lint)
/*ARGSUSED*/
uint64_t
__udivdi3(uint64_t a, uint64_t b)
{ return (0); }
/*ARGSUSED*/
uint64_t
__umoddi3(uint64_t a, uint64_t b)
{ return (0); }
/*ARGSUSED*/
int64_t
__divdi3(int64_t a, int64_t b)
{ return (0); }
/*ARGSUSED*/
int64_t
__moddi3(int64_t a, int64_t b)
{ return (0); }
#else
/*
* __udivdi3
*
* Perform division of two unsigned 64-bit quantities, returning the
* quotient in %edx:%eax.
*/
ENTRY(__udivdi3)
movl 4(%esp), %eax / x, x
movl 8(%esp), %edx / x, x
pushl 16(%esp) / y
pushl 16(%esp)
call UDiv
addl $8, %esp
ret
SET_SIZE(__udivdi3)
/*
* __umoddi3
*
* Perform division of two unsigned 64-bit quantities, returning the
* remainder in %edx:%eax.
*/
ENTRY(__umoddi3)
subl $12, %esp
movl %esp, %ecx /, tmp65
movl 16(%esp), %eax / x, x
movl 20(%esp), %edx / x, x
pushl %ecx / tmp65
pushl 32(%esp) / y
pushl 32(%esp)
call UDivRem
movl 12(%esp), %eax / rem, rem
movl 16(%esp), %edx / rem, rem
addl $24, %esp
ret
SET_SIZE(__umoddi3)
/*
* __divdi3
*
* Perform division of two signed 64-bit quantities, returning the
* quotient in %edx:%eax.
*/
/ int64_t
/ __divdi3(int64_t x, int64_t y)
/ {
/ int negative;
/ uint64_t xt, yt, r;
/
/ if (x < 0) {
/ xt = -(uint64_t) x;
/ negative = 1;
/ } else {
/ xt = x;
/ negative = 0;
/ }
/ if (y < 0) {
/ yt = -(uint64_t) y;
/ negative ^= 1;
/ } else {
/ yt = y;
/ }
/ r = UDiv(xt, yt);
/ return (negative ? (int64_t) - r : r);
/ }
ENTRY(__divdi3)
pushl %ebp
pushl %edi
pushl %esi
subl $8, %esp
movl 28(%esp), %edx / x, x
testl %edx, %edx / x
movl 24(%esp), %eax / x, x
movl 32(%esp), %esi / y, y
movl 36(%esp), %edi / y, y
js .LL55
xorl %ebp, %ebp / negative
testl %edi, %edi / y
movl %eax, (%esp) / x, xt
movl %edx, 4(%esp) / x, xt
movl %esi, %eax / y, yt
movl %edi, %edx / y, yt
js .LL56
.LL53:
pushl %edx / yt
pushl %eax / yt
movl 8(%esp), %eax / xt, xt
movl 12(%esp), %edx / xt, xt
call UDiv
popl %ecx
testl %ebp, %ebp / negative
popl %esi
je .LL54
negl %eax / r
adcl $0, %edx /, r
negl %edx / r
.LL54:
addl $8, %esp
popl %esi
popl %edi
popl %ebp
ret
.align 16
.LL55:
negl %eax / x
adcl $0, %edx /, x
negl %edx / x
testl %edi, %edi / y
movl %eax, (%esp) / x, xt
movl %edx, 4(%esp) / x, xt
movl $1, %ebp /, negative
movl %esi, %eax / y, yt
movl %edi, %edx / y, yt
jns .LL53
.align 16
.LL56:
negl %eax / yt
adcl $0, %edx /, yt
negl %edx / yt
xorl $1, %ebp /, negative
jmp .LL53
SET_SIZE(__divdi3)
/*
* __moddi3
*
* Perform division of two signed 64-bit quantities, returning the
* quotient in %edx:%eax.
*/
/ int64_t
/ __moddi3(int64_t x, int64_t y)
/ {
/ uint64_t xt, yt, rem;
/
/ if (x < 0) {
/ xt = -(uint64_t) x;
/ } else {
/ xt = x;
/ }
/ if (y < 0) {
/ yt = -(uint64_t) y;
/ } else {
/ yt = y;
/ }
/ (void) UDivRem(xt, yt, &rem);
/ return (x < 0 ? (int64_t) - rem : rem);
/ }
ENTRY(__moddi3)
pushl %edi
pushl %esi
subl $20, %esp
movl 36(%esp), %ecx / x,
movl 32(%esp), %esi / x,
movl 36(%esp), %edi / x,
testl %ecx, %ecx
movl 40(%esp), %eax / y, y
movl 44(%esp), %edx / y, y
movl %esi, (%esp) /, xt
movl %edi, 4(%esp) /, xt
js .LL63
testl %edx, %edx / y
movl %eax, %esi / y, yt
movl %edx, %edi / y, yt
js .LL64
.LL61:
leal 8(%esp), %eax /, tmp66
pushl %eax / tmp66
pushl %edi / yt
pushl %esi / yt
movl 12(%esp), %eax / xt, xt
movl 16(%esp), %edx / xt, xt
call UDivRem
addl $12, %esp
movl 36(%esp), %edi / x,
testl %edi, %edi
movl 8(%esp), %eax / rem, rem
movl 12(%esp), %edx / rem, rem
js .LL65
addl $20, %esp
popl %esi
popl %edi
ret
.align 16
.LL63:
negl %esi
adcl $0, %edi
negl %edi
testl %edx, %edx / y
movl %esi, (%esp) /, xt
movl %edi, 4(%esp) /, xt
movl %eax, %esi / y, yt
movl %edx, %edi / y, yt
jns .LL61
.align 16
.LL64:
negl %esi / yt
adcl $0, %edi /, yt
negl %edi / yt
jmp .LL61
.align 16
.LL65:
negl %eax / rem
adcl $0, %edx /, rem
addl $20, %esp
popl %esi
negl %edx / rem
popl %edi
ret
SET_SIZE(__moddi3)
#endif /* __lint */