sub_n.asm
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上传日期:2022-08-06
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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)