sub_n.asm revision 1.1.1.2
1dnl MIPS64 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, 2001, 2002, 2011 Free Software Foundation, Inc. 5 6dnl This file is part of the GNU MP Library. 7 8dnl The GNU MP Library is free software; you can redistribute it and/or modify 9dnl it under the terms of the GNU Lesser General Public License as published 10dnl by the Free Software Foundation; either version 3 of the License, or (at 11dnl your option) any later version. 12 13dnl The GNU MP Library is distributed in the hope that it will be useful, but 14dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16dnl License for more details. 17 18dnl You should have received a copy of the GNU Lesser General Public License 19dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. 20 21include(`../config.m4') 22 23C INPUT PARAMETERS 24C res_ptr $4 25C s1_ptr $5 26C s2_ptr $6 27C size $7 28 29ASM_START() 30PROLOGUE(mpn_sub_nc) 31 ld $10,0($5) 32 ld $11,0($6) 33 34 daddiu $7,$7,-1 35 and $9,$7,4-1 C number of limbs in first loop 36 beq $9,$0,.L0 C if multiple of 4 limbs, skip first loop 37 move $2,$8 38 b .Loop0 39 dsubu $7,$7,$9 40EPILOGUE() 41PROLOGUE(mpn_sub_n) 42 ld $10,0($5) 43 ld $11,0($6) 44 45 daddiu $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 dsubu $7,$7,$9 51 52.Loop0: daddiu $9,$9,-1 53 ld $12,8($5) 54 daddu $11,$11,$2 55 ld $13,8($6) 56 sltu $8,$11,$2 57 dsubu $11,$10,$11 58 sltu $2,$10,$11 59 sd $11,0($4) 60 or $2,$2,$8 61 62 daddiu $5,$5,8 63 daddiu $6,$6,8 64 move $10,$12 65 move $11,$13 66 bne $9,$0,.Loop0 67 daddiu $4,$4,8 68 69.L0: beq $7,$0,.Lend 70 nop 71 72.Loop: daddiu $7,$7,-4 73 74 ld $12,8($5) 75 dsubu $11,$10,$11 76 ld $13,8($6) 77 sltu $8,$10,$11 78 dsubu $14,$11,$2 79 sltu $2,$11,$14 80 sd $14,0($4) 81 or $2,$2,$8 82 83 ld $10,16($5) 84 dsubu $13,$12,$13 85 ld $11,16($6) 86 sltu $8,$12,$13 87 dsubu $14,$13,$2 88 sltu $2,$13,$14 89 sd $14,8($4) 90 or $2,$2,$8 91 92 ld $12,24($5) 93 dsubu $11,$10,$11 94 ld $13,24($6) 95 sltu $8,$10,$11 96 dsubu $14,$11,$2 97 sltu $2,$11,$14 98 sd $14,16($4) 99 or $2,$2,$8 100 101 ld $10,32($5) 102 dsubu $13,$12,$13 103 ld $11,32($6) 104 sltu $8,$12,$13 105 dsubu $14,$13,$2 106 sltu $2,$13,$14 107 sd $14,24($4) 108 or $2,$2,$8 109 110 daddiu $5,$5,32 111 daddiu $6,$6,32 112 113 bne $7,$0,.Loop 114 daddiu $4,$4,32 115 116.Lend: daddu $11,$11,$2 117 sltu $8,$11,$2 118 dsubu $11,$10,$11 119 sltu $2,$10,$11 120 sd $11,0($4) 121 j $31 122 or $2,$2,$8 123EPILOGUE() 124