sub_n.asm revision 1.1.1.2
1dnl MIPS32 mpn_sub_n -- Subtract two limb vectors of the same length > 0 and 2dnl store difference in a third limb vector. 3 4dnl Copyright 1995, 2000, 2002 Free Software Foundation, Inc. 5 6dnl This file is part of the GNU MP Library. 7dnl 8dnl The GNU MP Library is free software; you can redistribute it and/or modify 9dnl it under the terms of either: 10dnl 11dnl * the GNU Lesser General Public License as published by the Free 12dnl Software Foundation; either version 3 of the License, or (at your 13dnl option) any later version. 14dnl 15dnl or 16dnl 17dnl * the GNU General Public License as published by the Free Software 18dnl Foundation; either version 2 of the License, or (at your option) any 19dnl later version. 20dnl 21dnl or both in parallel, as here. 22dnl 23dnl The GNU MP Library is distributed in the hope that it will be useful, but 24dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 25dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 26dnl for more details. 27dnl 28dnl You should have received copies of the GNU General Public License and the 29dnl GNU Lesser General Public License along with the GNU MP Library. If not, 30dnl see https://www.gnu.org/licenses/. 31 32include(`../config.m4') 33 34C INPUT PARAMETERS 35C res_ptr $4 36C s1_ptr $5 37C s2_ptr $6 38C size $7 39 40ASM_START() 41PROLOGUE(mpn_sub_n) 42 lw $10,0($5) 43 lw $11,0($6) 44 45 addiu $7,$7,-1 46 and $9,$7,4-1 C number of limbs in first loop 47 beq $9,$0,.L0 C if multiple of 4 limbs, skip first loop 48 move $2,$0 49 50 subu $7,$7,$9 51 52.Loop0: addiu $9,$9,-1 53 lw $12,4($5) 54 addu $11,$11,$2 55 lw $13,4($6) 56 sltu $8,$11,$2 57 subu $11,$10,$11 58 sltu $2,$10,$11 59 sw $11,0($4) 60 or $2,$2,$8 61 62 addiu $5,$5,4 63 addiu $6,$6,4 64 move $10,$12 65 move $11,$13 66 bne $9,$0,.Loop0 67 addiu $4,$4,4 68 69.L0: beq $7,$0,.Lend 70 nop 71 72.Loop: addiu $7,$7,-4 73 74 lw $12,4($5) 75 addu $11,$11,$2 76 lw $13,4($6) 77 sltu $8,$11,$2 78 subu $11,$10,$11 79 sltu $2,$10,$11 80 sw $11,0($4) 81 or $2,$2,$8 82 83 lw $10,8($5) 84 addu $13,$13,$2 85 lw $11,8($6) 86 sltu $8,$13,$2 87 subu $13,$12,$13 88 sltu $2,$12,$13 89 sw $13,4($4) 90 or $2,$2,$8 91 92 lw $12,12($5) 93 addu $11,$11,$2 94 lw $13,12($6) 95 sltu $8,$11,$2 96 subu $11,$10,$11 97 sltu $2,$10,$11 98 sw $11,8($4) 99 or $2,$2,$8 100 101 lw $10,16($5) 102 addu $13,$13,$2 103 lw $11,16($6) 104 sltu $8,$13,$2 105 subu $13,$12,$13 106 sltu $2,$12,$13 107 sw $13,12($4) 108 or $2,$2,$8 109 110 addiu $5,$5,16 111 addiu $6,$6,16 112 113 bne $7,$0,.Loop 114 addiu $4,$4,16 115 116.Lend: addu $11,$11,$2 117 sltu $8,$11,$2 118 subu $11,$10,$11 119 sltu $2,$10,$11 120 sw $11,0($4) 121 j $31 122 or $2,$2,$8 123EPILOGUE(mpn_sub_n) 124