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dnl MIPS64 mpn_lshift -- Left shift.
dnl Copyright 1995, 2000, 2001, 2002 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU Lesser General Public License as published
dnl by the Free Software Foundation; either version 2.1 of the License, or (at
dnl your option) any later version.
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
dnl License for more details.
dnl You should have received a copy of the GNU Lesser General Public License
dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write to
dnl the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
dnl MA 02110-1301, USA.
include(`../config.m4')
C INPUT PARAMETERS
C res_ptr $4
C src_ptr $5
C size $6
C cnt $7
ASM_START()
PROLOGUE(mpn_lshift)
dsll $2,$6,3
daddu $5,$5,$2 C make r5 point at end of src
ld $10,-8($5) C load first limb
dsubu $13,$0,$7
daddu $4,$4,$2 C make r4 point at end of res
daddiu $6,$6,-1
and $9,$6,4-1 C number of limbs in first loop
beq $9,$0,.L0 C if multiple of 4 limbs, skip first loop
dsrl $2,$10,$13 C compute function result
dsubu $6,$6,$9
.Loop0: ld $3,-16($5)
daddiu $4,$4,-8
daddiu $5,$5,-8
daddiu $9,$9,-1
dsll $11,$10,$7
dsrl $12,$3,$13
move $10,$3
or $8,$11,$12
bne $9,$0,.Loop0
sd $8,0($4)
.L0: beq $6,$0,.Lend
nop
.Loop: ld $3,-16($5)
daddiu $4,$4,-32
daddiu $6,$6,-4
dsll $11,$10,$7
dsrl $12,$3,$13
ld $10,-24($5)
dsll $14,$3,$7
or $8,$11,$12
sd $8,24($4)
dsrl $9,$10,$13
ld $3,-32($5)
dsll $11,$10,$7
or $8,$14,$9
sd $8,16($4)
dsrl $12,$3,$13
ld $10,-40($5)
dsll $14,$3,$7
or $8,$11,$12
sd $8,8($4)
dsrl $9,$10,$13
daddiu $5,$5,-32
or $8,$14,$9
bgtz $6,.Loop
sd $8,0($4)
.Lend: dsll $8,$10,$7
j $31
sd $8,-8($4)
EPILOGUE(mpn_lshift)
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