glibc/sysdeps/mips/mul_1.S
Joseph Myers 2ad7600be7 Move mips from ports to libc.
I've moved the MIPS port from ports to the main sysdeps hierarchy.
Beyond the README update, the move of the files was simply

git mv ports/sysdeps/mips sysdeps/mips
git mv ports/sysdeps/unix/mips sysdeps/unix/mips
git mv ports/sysdeps/unix/sysv/linux/mips sysdeps/unix/sysv/linux/mips

and in addition to the ChangeLog entries here, I put a note at the top
of ports/ChangeLog.mips similar to those in other files.

Tested that disassembly of installed shared libraries for mips is the
same before and after this patch (except for ld.so where paths in
assertions are involved, as for arm).

	* sysdeps/mips: Move directory from ports/sysdeps/mips.
	* sysdeps/unix/mips: Move directory from ports/sysdeps/unix/mips.
	* sysdeps/unix/sysv/linux/mips: Move directory from
	ports/sysdeps/unix/sysv/linux/mips.
	* README: Update listing for mips-*-linux-gnu and
	mips64-*-linux-gnu.

	* sysdeps/mips: Move directory to ../sysdeps/mips.
	* sysdeps/unix/mips: Move directory to ../sysdeps/unix/mips.
	* sysdeps/unix/sysv/linux/mips: Move directory to
	../sysdeps/unix/sysv/linux/mips.
2014-02-10 23:30:21 +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) 1995-2014 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 Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library. If not, see
<http://www.gnu.org/licenses/>. */
#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,L(LC0)
move $2,$0 /* zero cy2 */
addiu $6,$6,-1
beq $6,$0,L(LC1)
lw $8,0($5) /* load new s1 limb as early as possible */
L(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,L(Loop) /* should be "bnel" */
addu $2,$9,$2 /* add high product limb and carry from addition */
/* cool down phase 1 */
L(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 */
L(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 */
END (__mpn_mul_1)