132 lines
3.5 KiB
ArmAsm
132 lines
3.5 KiB
ArmAsm
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.file "poly_div.S"
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/*
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* poly_div.S
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*
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* A set of functions to divide 64 bit integers by fixed numbers.
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*
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*
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* Copyright (C) 1992, 1993 W. Metzenthen, 22 Parker St, Ormond,
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* Vic 3163, Australia.
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* E-mail apm233m@vaxc.cc.monash.edu.au
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* All rights reserved.
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*
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* This copyright notice covers the redistribution and use of the
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* FPU emulator developed by W. Metzenthen. It covers only its use
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* in the 386BSD operating system. Any other use is not permitted
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* under this copyright.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must include information specifying
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* that source code for the emulator is freely available and include
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* either:
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* a) an offer to provide the source code for a nominal distribution
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* fee, or
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* b) list at least two alternative methods whereby the source
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* can be obtained, e.g. a publically accessible bulletin board
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* and an anonymous ftp site from which the software can be
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* downloaded.
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* 3. All advertising materials specifically mentioning features or use of
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* this emulator must acknowledge that it was developed by W. Metzenthen.
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* 4. The name of W. Metzenthen may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* W. METZENTHEN BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "fpu_asm.h"
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.text
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/*---------------------------------------------------------------------------*/
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.align 2,144
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.globl _poly_div2
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_poly_div2:
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pushl %ebp
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movl %esp,%ebp
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movl PARAM1,%ecx
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movw (%ecx),%ax
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shrl $1,4(%ecx)
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rcrl $1,(%ecx)
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testw $1,%ax
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je poly_div2_exit
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addl $1,(%ecx)
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adcl $0,4(%ecx)
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poly_div2_exit:
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leave
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ret
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/*---------------------------------------------------------------------------*/
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.align 2,144
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.globl _poly_div4
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_poly_div4:
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pushl %ebp
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movl %esp,%ebp
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movl PARAM1,%ecx
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movw (%ecx),%ax
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movl 4(%ecx),%edx
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shll $30,%edx
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shrl $2,4(%ecx)
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shrl $2,(%ecx)
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orl %edx,(%ecx)
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testw $2,%ax
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je poly_div4_exit
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addl $1,(%ecx)
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adcl $0,4(%ecx)
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poly_div4_exit:
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leave
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ret
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/*---------------------------------------------------------------------------*/
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.align 2,144
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.globl _poly_div16
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_poly_div16:
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pushl %ebp
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movl %esp,%ebp
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movl PARAM1,%ecx
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movw (%ecx),%ax
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movl 4(%ecx),%edx
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shll $28,%edx
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shrl $4,4(%ecx)
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shrl $4,(%ecx)
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orl %edx,(%ecx)
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testw $8,%ax
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je poly_div16_exit
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addl $1,(%ecx)
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adcl $0,4(%ecx)
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poly_div16_exit:
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leave
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ret
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/*---------------------------------------------------------------------------*/
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