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dnl MIPS64 mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
dnl store difference in a third limb vector.
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 3 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. If not, see http://www.gnu.org/licenses/.
include(`../config.m4')
C INPUT PARAMETERS
C res_ptr $4
C s1_ptr $5
C s2_ptr $6
C size $7
ASM_START()
PROLOGUE(mpn_sub_n)
ld $10,0($5)
ld $11,0($6)
daddiu $7,$7,-1
and $9,$7,4-1 C number of limbs in first loop
beq $9,$0,.L0 C if multiple of 4 limbs, skip first loop
move $2,$0
dsubu $7,$7,$9
.Loop0: daddiu $9,$9,-1
ld $12,8($5)
daddu $11,$11,$2
ld $13,8($6)
sltu $8,$11,$2
dsubu $11,$10,$11
sltu $2,$10,$11
sd $11,0($4)
or $2,$2,$8
daddiu $5,$5,8
daddiu $6,$6,8
move $10,$12
move $11,$13
bne $9,$0,.Loop0
daddiu $4,$4,8
.L0: beq $7,$0,.Lend
nop
.Loop: daddiu $7,$7,-4
ld $12,8($5)
dsubu $11,$10,$11
ld $13,8($6)
sltu $8,$10,$11
dsubu $14,$11,$2
sltu $2,$11,$14
sd $14,0($4)
or $2,$2,$8
ld $10,16($5)
dsubu $13,$12,$13
ld $11,16($6)
sltu $8,$12,$13
dsubu $14,$13,$2
sltu $2,$13,$14
sd $14,8($4)
or $2,$2,$8
ld $12,24($5)
dsubu $11,$10,$11
ld $13,24($6)
sltu $8,$10,$11
dsubu $14,$11,$2
sltu $2,$11,$14
sd $14,16($4)
or $2,$2,$8
ld $10,32($5)
dsubu $13,$12,$13
ld $11,32($6)
sltu $8,$12,$13
dsubu $14,$13,$2
sltu $2,$13,$14
sd $14,24($4)
or $2,$2,$8
daddiu $5,$5,32
daddiu $6,$6,32
bne $7,$0,.Loop
daddiu $4,$4,32
.Lend: daddu $11,$11,$2
sltu $8,$11,$2
dsubu $11,$10,$11
sltu $2,$10,$11
sd $11,0($4)
j $31
or $2,$2,$8
EPILOGUE(mpn_sub_n)
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