glibc/sysdeps/mips/mul_1.S
Ulrich Drepper 48252123bc Update.
1998-09-03  Philip Blundell  <pb@nexus.co.uk> 
 
	* sysdeps/arm/bits/endian.h (__FLOAT_WORD_ORDER): Define to big 
	endian. 
	* math/math_private.h: Use __FLOAT_WORD_ORDER rather than 
	BYTE_ORDER. 
	* string/endian.h: If __FLOAT_WORD_ORDER wasn't defined by 
	<bits/endian.h>, make it the same as __BYTE_ORDER. 
 
1998-11-27  Ulrich Drepper  <drepper@cygnus.com>

	* math/math.h: Avoid using long double functions in generic macros
	if __NO_LONG_DOUBLE_MATH.

	* sysdeps/arm/dl-machine.h: Fix handling of weak undefined symbols
	during bootstrapping.
	* scripts/config.sub: Add Netwinder specific matches.
	Patch by Scott Bambrough <scottb@corelcomputer.com>.

1998-11-26  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de> 
 
	* Makeconfig ($(common-objpfx)sysd-dirs): Use automatic variables 
	if possible. 
	($(common-objpfx)sysd-sorted): Likewise. 
 
1998-11-27  Andreas Jaeger  <aj@arthur.rhein-neckar.de> 
 
	* sysdeps/libm-ieee754/e_log.c (__ieee754_log): Add declaration of  
	local variables t1,t2 only if needed. 
 
	* sysdeps/libm-ieee754/e_atan2.c: Added braces to avoid compiler
	warnings.
	* sysdeps/libm-ieee754/s_truncf.c (__truncf): Likewise. 
	* sysdeps/libm-ieee754/s_trunc.c (__trunc): Likewise. 
 
	* sysdeps/mips/mul_1.S (Loop): Add closing comment to avoid 
	warning. 
 
1998-11-27  Andreas Jaeger  <aj@arthur.rhein-neckar.de> 
 
	* math/math.h: Add brace to correct #if expression.
1998-11-27 11:34:40 +00:00

87 lines
2.1 KiB
ArmAsm

/* MIPS __mpn_mul_1 -- Multiply a limb vector with a single limb and
store the product in a second limb vector.
Copyright (C) 1995, 1998 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
The GNU MP Library 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 Library General Public License
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <sysdep.h>
/* INPUT PARAMETERS
res_ptr $4
s1_ptr $5
size $6
s2_limb $7
*/
#ifdef PIC
.option pic2
#endif
ENTRY (__mpn_mul_1)
.set noreorder
#ifdef PIC
.cpload t9
#endif
.set nomacro
/* warm up phase 0 */
lw $8,0($5)
/* warm up phase 1 */
addiu $5,$5,4
multu $8,$7
addiu $6,$6,-1
beq $6,$0,$LC0
move $2,$0 /* zero cy2 */
addiu $6,$6,-1
beq $6,$0,$LC1
lw $8,0($5) /* load new s1 limb as early as possible */
Loop: mflo $10
mfhi $9
addiu $5,$5,4
addu $10,$10,$2 /* add old carry limb to low product limb */
multu $8,$7
lw $8,0($5) /* load new s1 limb as early as possible */
addiu $6,$6,-1 /* decrement loop counter */
sltu $2,$10,$2 /* carry from previous addition -> $2 */
sw $10,0($4)
addiu $4,$4,4
bne $6,$0,Loop /* should be "bnel" */
addu $2,$9,$2 /* add high product limb and carry from addition */
/* cool down phase 1 */
$LC1: mflo $10
mfhi $9
addu $10,$10,$2
sltu $2,$10,$2
multu $8,$7
sw $10,0($4)
addiu $4,$4,4
addu $2,$9,$2 /* add high product limb and carry from addition */
/* cool down phase 0 */
$LC0: mflo $10
mfhi $9
addu $10,$10,$2
sltu $2,$10,$2
sw $10,0($4)
j $31
addu $2,$9,$2 /* add high product limb and carry from addition */