| 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) |
