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/* MIPS2 __mpn_lshift --
Copyright (C) 1995 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
src_ptr $5
size $6
cnt $7
*/
#ifdef PIC
.option pic2
#endif
ENTRY (__mpn_lshift)
.set noreorder
#ifdef PIC
.cpload t9
#endif
.set nomacro
sll $2,$6,2
addu $5,$5,$2 /* make r5 point at end of src */
lw $10,-4($5) /* load first limb */
subu $13,$0,$7
addu $4,$4,$2 /* make r4 point at end of res */
addiu $6,$6,-1
and $9,$6,4-1 /* number of limbs in first loop */
beq $9,$0,.L0 /* if multiple of 4 limbs, skip first loop */
srl $2,$10,$13 /* compute function result */
subu $6,$6,$9
.Loop0: lw $3,-8($5)
addiu $4,$4,-4
addiu $5,$5,-4
addiu $9,$9,-1
sll $11,$10,$7
srl $12,$3,$13
move $10,$3
or $8,$11,$12
bne $9,$0,.Loop0
sw $8,0($4)
.L0: beq $6,$0,.Lend
nop
.Loop: lw $3,-8($5)
addiu $4,$4,-16
addiu $6,$6,-4
sll $11,$10,$7
srl $12,$3,$13
lw $10,-12($5)
sll $14,$3,$7
or $8,$11,$12
sw $8,12($4)
srl $9,$10,$13
lw $3,-16($5)
sll $11,$10,$7
or $8,$14,$9
sw $8,8($4)
srl $12,$3,$13
lw $10,-20($5)
sll $14,$3,$7
or $8,$11,$12
sw $8,4($4)
srl $9,$10,$13
addiu $5,$5,-16
or $8,$14,$9
bgtz $6,.Loop
sw $8,0($4)
.Lend: sll $8,$10,$7
j $31
sw $8,-4($4)
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