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Diffstat (limited to 'sys/gnu/arch/i386/fpemul/poly_div.s')
-rw-r--r-- | sys/gnu/arch/i386/fpemul/poly_div.s | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/sys/gnu/arch/i386/fpemul/poly_div.s b/sys/gnu/arch/i386/fpemul/poly_div.s new file mode 100644 index 00000000000..9b94c96a5b4 --- /dev/null +++ b/sys/gnu/arch/i386/fpemul/poly_div.s @@ -0,0 +1,147 @@ + .file "poly_div.S" +/* $OpenBSD: poly_div.s,v 1.1 1996/08/27 10:32:53 downsj Exp $ */ +/* + * 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. + * + * + * $FreeBSD: poly_div.s,v 1.3 1994/06/10 07:44:36 rich Exp $ + * + */ + +#include <machine/asm.h> + +#include <gnu/arch/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 +/*---------------------------------------------------------------------------*/ |