linux-next/arch/alpha/math-emu/qrnnd.S

 # Alpha 21064 __udiv_qrnnd
 # Copyright (C) 1992, 1994, 1995, 2000 Free Software Foundation, Inc.

 # This file is part of GCC.

 # The GNU MP Library is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation; either version 2 of the License, or (at your
 # option) any later version.

 # In addition to the permissions in the GNU General Public License, the
 # Free Software Foundation gives you unlimited permission to link the
 # compiled version of this file with other programs, and to distribute
 # those programs without any restriction coming from the use of this
 # file.  (The General Public License restrictions do apply in other
 # respects; for example, they cover modification of the file, and
 # distribution when not linked into another program.)

 # This file is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 # or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
 # License for more details.

 # You should have received a copy of the GNU General Public License
 # along with GCC; see the file COPYING.  If not, write to the 
 # Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 # MA 02111-1307, USA.

        .set noreorder
        .set noat

	.text

	.globl __udiv_qrnnd
	.ent __udiv_qrnnd
__udiv_qrnnd:
	.frame $30,0,$26,0
	.prologue 0

#define cnt	$2
#define tmp	$3
#define rem_ptr	$16
#define n1	$17
#define n0	$18
#define d	$19
#define qb	$20
#define AT	$at

	ldiq	cnt,16
	blt	d,$largedivisor

$loop1:	cmplt	n0,0,tmp
	addq	n1,n1,n1
	bis	n1,tmp,n1
	addq	n0,n0,n0
	cmpule	d,n1,qb
	subq	n1,d,tmp
	cmovne	qb,tmp,n1
	bis	n0,qb,n0
	cmplt	n0,0,tmp
	addq	n1,n1,n1
	bis	n1,tmp,n1
	addq	n0,n0,n0
	cmpule	d,n1,qb
	subq	n1,d,tmp
	cmovne	qb,tmp,n1
	bis	n0,qb,n0
	cmplt	n0,0,tmp
	addq	n1,n1,n1
	bis	n1,tmp,n1
	addq	n0,n0,n0
	cmpule	d,n1,qb
	subq	n1,d,tmp
	cmovne	qb,tmp,n1
	bis	n0,qb,n0
	cmplt	n0,0,tmp
	addq	n1,n1,n1
	bis	n1,tmp,n1
	addq	n0,n0,n0
	cmpule	d,n1,qb
	subq	n1,d,tmp
	cmovne	qb,tmp,n1
	bis	n0,qb,n0
	subq	cnt,1,cnt
	bgt	cnt,$loop1
	stq	n1,0(rem_ptr)
	bis	$31,n0,$0
	ret	$31,($26),1

$largedivisor:
	and	n0,1,$4

	srl	n0,1,n0
	sll	n1,63,tmp
	or	tmp,n0,n0
	srl	n1,1,n1

	and	d,1,$6
	srl	d,1,$5
	addq	$5,$6,$5

$loop2:	cmplt	n0,0,tmp
	addq	n1,n1,n1
	bis	n1,tmp,n1
	addq	n0,n0,n0
	cmpule	$5,n1,qb
	subq	n1,$5,tmp
	cmovne	qb,tmp,n1
	bis	n0,qb,n0
	cmplt	n0,0,tmp
	addq	n1,n1,n1
	bis	n1,tmp,n1
	addq	n0,n0,n0
	cmpule	$5,n1,qb
	subq	n1,$5,tmp
	cmovne	qb,tmp,n1
	bis	n0,qb,n0
	cmplt	n0,0,tmp
	addq	n1,n1,n1
	bis	n1,tmp,n1
	addq	n0,n0,n0
	cmpule	$5,n1,qb
	subq	n1,$5,tmp
	cmovne	qb,tmp,n1
	bis	n0,qb,n0
	cmplt	n0,0,tmp
	addq	n1,n1,n1
	bis	n1,tmp,n1
	addq	n0,n0,n0
	cmpule	$5,n1,qb
	subq	n1,$5,tmp
	cmovne	qb,tmp,n1
	bis	n0,qb,n0
	subq	cnt,1,cnt
	bgt	cnt,$loop2

	addq	n1,n1,n1
	addq	$4,n1,n1
	bne	$6,$Odd
	stq	n1,0(rem_ptr)
	bis	$31,n0,$0
	ret	$31,($26),1

$Odd:
	/* q' in n0. r' in n1 */
	addq	n1,n0,n1

	cmpult	n1,n0,tmp	# tmp := carry from addq
	subq	n1,d,AT
	addq	n0,tmp,n0
	cmovne	tmp,AT,n1

	cmpult	n1,d,tmp
	addq	n0,1,AT
	cmoveq	tmp,AT,n0
	subq	n1,d,AT
	cmoveq	tmp,AT,n1

	stq	n1,0(rem_ptr)
	bis	$31,n0,$0
	ret	$31,($26),1

	.end	__udiv_qrnnd
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-17 06:20:36 +08:00			`# Alpha 21064 __udiv_qrnnd`
			`# Copyright (C) 1992, 1994, 1995, 2000 Free Software Foundation, Inc.`

			`# This file is part of GCC.`

			`# The GNU MP Library is free software; you can redistribute it and/or modify`
			`# it under the terms of the GNU General Public License as published by`
			`# the Free Software Foundation; either version 2 of the License, or (at your`
			`# option) any later version.`

			`# In addition to the permissions in the GNU General Public License, the`
			`# Free Software Foundation gives you unlimited permission to link the`
			`# compiled version of this file with other programs, and to distribute`
			`# those programs without any restriction coming from the use of this`
			`# file. (The General Public License restrictions do apply in other`
			`# respects; for example, they cover modification of the file, and`
			`# distribution when not linked into another program.)`

			`# This file is distributed in the hope that it will be useful, but`
			`# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY`
			`# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public`
			`# License for more details.`

			`# You should have received a copy of the GNU General Public License`
			`# along with GCC; see the file COPYING. If not, write to the`
			`# Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,`
			`# MA 02111-1307, USA.`

			`.set noreorder`
			`.set noat`

			`.text`

			`.globl __udiv_qrnnd`
			`.ent __udiv_qrnnd`
			`__udiv_qrnnd:`
			`.frame $30,0,$26,0`
			`.prologue 0`

			`#define cnt $2`
			`#define tmp $3`
			`#define rem_ptr $16`
			`#define n1 $17`
			`#define n0 $18`
			`#define d $19`
			`#define qb $20`
			`#define AT $at`

			`ldiq cnt,16`
			`blt d,$largedivisor`

			`$loop1: cmplt n0,0,tmp`
			`addq n1,n1,n1`
			`bis n1,tmp,n1`
			`addq n0,n0,n0`
			`cmpule d,n1,qb`
			`subq n1,d,tmp`
			`cmovne qb,tmp,n1`
			`bis n0,qb,n0`
			`cmplt n0,0,tmp`
			`addq n1,n1,n1`
			`bis n1,tmp,n1`
			`addq n0,n0,n0`
			`cmpule d,n1,qb`
			`subq n1,d,tmp`
			`cmovne qb,tmp,n1`
			`bis n0,qb,n0`
			`cmplt n0,0,tmp`
			`addq n1,n1,n1`
			`bis n1,tmp,n1`
			`addq n0,n0,n0`
			`cmpule d,n1,qb`
			`subq n1,d,tmp`
			`cmovne qb,tmp,n1`
			`bis n0,qb,n0`
			`cmplt n0,0,tmp`
			`addq n1,n1,n1`
			`bis n1,tmp,n1`
			`addq n0,n0,n0`
			`cmpule d,n1,qb`
			`subq n1,d,tmp`
			`cmovne qb,tmp,n1`
			`bis n0,qb,n0`
			`subq cnt,1,cnt`
			`bgt cnt,$loop1`
			`stq n1,0(rem_ptr)`
			`bis $31,n0,$0`
			`ret $31,($26),1`

			`$largedivisor:`
			`and n0,1,$4`

			`srl n0,1,n0`
			`sll n1,63,tmp`
			`or tmp,n0,n0`
			`srl n1,1,n1`

			`and d,1,$6`
			`srl d,1,$5`
			`addq $5,$6,$5`

			`$loop2: cmplt n0,0,tmp`
			`addq n1,n1,n1`
			`bis n1,tmp,n1`
			`addq n0,n0,n0`
			`cmpule $5,n1,qb`
			`subq n1,$5,tmp`
			`cmovne qb,tmp,n1`
			`bis n0,qb,n0`
			`cmplt n0,0,tmp`
			`addq n1,n1,n1`
			`bis n1,tmp,n1`
			`addq n0,n0,n0`
			`cmpule $5,n1,qb`
			`subq n1,$5,tmp`
			`cmovne qb,tmp,n1`
			`bis n0,qb,n0`
			`cmplt n0,0,tmp`
			`addq n1,n1,n1`
			`bis n1,tmp,n1`
			`addq n0,n0,n0`
			`cmpule $5,n1,qb`
			`subq n1,$5,tmp`
			`cmovne qb,tmp,n1`
			`bis n0,qb,n0`
			`cmplt n0,0,tmp`
			`addq n1,n1,n1`
			`bis n1,tmp,n1`
			`addq n0,n0,n0`
			`cmpule $5,n1,qb`
			`subq n1,$5,tmp`
			`cmovne qb,tmp,n1`
			`bis n0,qb,n0`
			`subq cnt,1,cnt`
			`bgt cnt,$loop2`

			`addq n1,n1,n1`
			`addq $4,n1,n1`
			`bne $6,$Odd`
			`stq n1,0(rem_ptr)`
			`bis $31,n0,$0`
			`ret $31,($26),1`

			`$Odd:`
			`/* q' in n0. r' in n1 */`
			`addq n1,n0,n1`

			`cmpult n1,n0,tmp # tmp := carry from addq`
			`subq n1,d,AT`
			`addq n0,tmp,n0`
			`cmovne tmp,AT,n1`

			`cmpult n1,d,tmp`
			`addq n0,1,AT`
			`cmoveq tmp,AT,n0`
			`subq n1,d,AT`
			`cmoveq tmp,AT,n1`

			`stq n1,0(rem_ptr)`
			`bis $31,n0,$0`
			`ret $31,($26),1`

			`.end __udiv_qrnnd`