145 lines
3.9 KiB
ArmAsm
145 lines
3.9 KiB
ArmAsm
.file "poly_div.S"
|
|
/*
|
|
* poly_div.S
|
|
*
|
|
* A set of functions to divide 64 bit integers by fixed numbers.
|
|
*
|
|
*
|
|
* Copyright (C) 1992,1993,1994
|
|
* W. Metzenthen, 22 Parker St, Ormond, Vic 3163,
|
|
* Australia. E-mail billm@vaxc.cc.monash.edu.au
|
|
* All rights reserved.
|
|
*
|
|
* This copyright notice covers the redistribution and use of the
|
|
* FPU emulator developed by W. Metzenthen. It covers only its use
|
|
* in the 386BSD, FreeBSD and NetBSD operating systems. Any other
|
|
* use is not permitted under this copyright.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must include information specifying
|
|
* that source code for the emulator is freely available and include
|
|
* either:
|
|
* a) an offer to provide the source code for a nominal distribution
|
|
* fee, or
|
|
* b) list at least two alternative methods whereby the source
|
|
* can be obtained, e.g. a publically accessible bulletin board
|
|
* and an anonymous ftp site from which the software can be
|
|
* downloaded.
|
|
* 3. All advertising materials specifically mentioning features or use of
|
|
* this emulator must acknowledge that it was developed by W. Metzenthen.
|
|
* 4. The name of W. Metzenthen may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``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
|
|
* W. METZENTHEN 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.
|
|
*
|
|
*
|
|
* The purpose of this copyright, based upon the Berkeley copyright, is to
|
|
* ensure that the covered software remains freely available to everyone.
|
|
*
|
|
* The software (with necessary differences) is also available, but under
|
|
* the terms of the GNU copyleft, for the Linux operating system and for
|
|
* the djgpp ms-dos extender.
|
|
*
|
|
* W. Metzenthen June 1994.
|
|
*
|
|
*
|
|
* $Id$
|
|
*
|
|
*/
|
|
|
|
#include <gnu/i386/fpemul/fpu_asm.h>
|
|
|
|
.text
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
.align 2,144
|
|
.globl _poly_div2
|
|
_poly_div2:
|
|
pushl %ebp
|
|
movl %esp,%ebp
|
|
|
|
movl PARAM1,%ecx
|
|
movw (%ecx),%ax
|
|
|
|
shrl $1,4(%ecx)
|
|
rcrl $1,(%ecx)
|
|
|
|
testw $1,%ax
|
|
je poly_div2_exit
|
|
|
|
addl $1,(%ecx)
|
|
adcl $0,4(%ecx)
|
|
poly_div2_exit:
|
|
|
|
leave
|
|
ret
|
|
/*---------------------------------------------------------------------------*/
|
|
.align 2,144
|
|
.globl _poly_div4
|
|
_poly_div4:
|
|
pushl %ebp
|
|
movl %esp,%ebp
|
|
|
|
movl PARAM1,%ecx
|
|
movw (%ecx),%ax
|
|
|
|
movl 4(%ecx),%edx
|
|
shll $30,%edx
|
|
|
|
shrl $2,4(%ecx)
|
|
shrl $2,(%ecx)
|
|
|
|
orl %edx,(%ecx)
|
|
|
|
testw $2,%ax
|
|
je poly_div4_exit
|
|
|
|
addl $1,(%ecx)
|
|
adcl $0,4(%ecx)
|
|
poly_div4_exit:
|
|
|
|
leave
|
|
ret
|
|
/*---------------------------------------------------------------------------*/
|
|
.align 2,144
|
|
.globl _poly_div16
|
|
_poly_div16:
|
|
pushl %ebp
|
|
movl %esp,%ebp
|
|
|
|
movl PARAM1,%ecx
|
|
movw (%ecx),%ax
|
|
|
|
movl 4(%ecx),%edx
|
|
shll $28,%edx
|
|
|
|
shrl $4,4(%ecx)
|
|
shrl $4,(%ecx)
|
|
|
|
orl %edx,(%ecx)
|
|
|
|
testw $8,%ax
|
|
je poly_div16_exit
|
|
|
|
addl $1,(%ecx)
|
|
adcl $0,4(%ecx)
|
|
poly_div16_exit:
|
|
|
|
leave
|
|
ret
|
|
/*---------------------------------------------------------------------------*/
|