| 1 | /* MIPS2 __mpn_add_n -- Add two limb vectors of the same length > 0 and |
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| 2 | store sum in a third limb vector. |
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| 3 | |
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| 4 | Copyright (C) 1995-2022 Free Software Foundation, Inc. |
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| 5 | |
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| 6 | This file is part of the GNU MP Library. |
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| 7 | |
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| 8 | The GNU MP Library is free software; you can redistribute it and/or modify |
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| 9 | it under the terms of the GNU Lesser General Public License as published by |
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| 10 | the Free Software Foundation; either version 2.1 of the License, or (at your |
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| 11 | option) any later version. |
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| 12 | |
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| 13 | The GNU MP Library is distributed in the hope that it will be useful, but |
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| 14 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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| 15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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| 16 | License for more details. |
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| 17 | |
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| 18 | You should have received a copy of the GNU Lesser General Public License |
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| 19 | along with the GNU MP Library. If not, see |
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| 20 | <https://www.gnu.org/licenses/>. */ |
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| 21 | |
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| 22 | #include <sysdep.h> |
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| 23 | |
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| 24 | /* INPUT PARAMETERS |
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| 25 | res_ptr $4 |
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| 26 | s1_ptr $5 |
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| 27 | s2_ptr $6 |
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| 28 | size $7 |
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| 29 | */ |
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| 30 | #ifdef __PIC__ |
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| 31 | .option pic2 |
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| 32 | #endif |
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| 33 | ENTRY (__mpn_add_n) |
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| 34 | .set noreorder |
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| 35 | #ifdef __PIC__ |
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| 36 | .cpload t9 |
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| 37 | #endif |
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| 38 | .set nomacro |
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| 39 | |
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| 40 | lw $10,0($5) |
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| 41 | lw $11,0($6) |
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| 42 | |
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| 43 | addiu $7,$7,-1 |
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| 44 | and $9,$7,4-1 /* number of limbs in first loop */ |
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| 45 | beq $9,$0,L(L0) /* if multiple of 4 limbs, skip first loop */ |
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| 46 | move $2,$0 |
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| 47 | |
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| 48 | subu $7,$7,$9 |
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| 49 | |
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| 50 | L(Loop0): addiu $9,$9,-1 |
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| 51 | lw $12,4($5) |
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| 52 | addu $11,$11,$2 |
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| 53 | lw $13,4($6) |
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| 54 | sltu $8,$11,$2 |
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| 55 | addu $11,$10,$11 |
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| 56 | sltu $2,$11,$10 |
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| 57 | sw $11,0($4) |
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| 58 | or $2,$2,$8 |
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| 59 | |
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| 60 | addiu $5,$5,4 |
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| 61 | addiu $6,$6,4 |
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| 62 | move $10,$12 |
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| 63 | move $11,$13 |
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| 64 | bne $9,$0,L(Loop0) |
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| 65 | addiu $4,$4,4 |
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| 66 | |
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| 67 | L(L0): beq $7,$0,L(end) |
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| 68 | nop |
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| 69 | |
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| 70 | L(Loop): addiu $7,$7,-4 |
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| 71 | |
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| 72 | lw $12,4($5) |
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| 73 | addu $11,$11,$2 |
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| 74 | lw $13,4($6) |
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| 75 | sltu $8,$11,$2 |
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| 76 | addu $11,$10,$11 |
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| 77 | sltu $2,$11,$10 |
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| 78 | sw $11,0($4) |
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| 79 | or $2,$2,$8 |
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| 80 | |
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| 81 | lw $10,8($5) |
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| 82 | addu $13,$13,$2 |
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| 83 | lw $11,8($6) |
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| 84 | sltu $8,$13,$2 |
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| 85 | addu $13,$12,$13 |
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| 86 | sltu $2,$13,$12 |
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| 87 | sw $13,4($4) |
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| 88 | or $2,$2,$8 |
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| 89 | |
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| 90 | lw $12,12($5) |
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| 91 | addu $11,$11,$2 |
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| 92 | lw $13,12($6) |
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| 93 | sltu $8,$11,$2 |
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| 94 | addu $11,$10,$11 |
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| 95 | sltu $2,$11,$10 |
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| 96 | sw $11,8($4) |
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| 97 | or $2,$2,$8 |
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| 98 | |
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| 99 | lw $10,16($5) |
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| 100 | addu $13,$13,$2 |
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| 101 | lw $11,16($6) |
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| 102 | sltu $8,$13,$2 |
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| 103 | addu $13,$12,$13 |
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| 104 | sltu $2,$13,$12 |
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| 105 | sw $13,12($4) |
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| 106 | or $2,$2,$8 |
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| 107 | |
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| 108 | addiu $5,$5,16 |
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| 109 | addiu $6,$6,16 |
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| 110 | |
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| 111 | bne $7,$0,L(Loop) |
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| 112 | addiu $4,$4,16 |
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| 113 | |
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| 114 | L(end): addu $11,$11,$2 |
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| 115 | sltu $8,$11,$2 |
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| 116 | addu $11,$10,$11 |
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| 117 | sltu $2,$11,$10 |
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| 118 | sw $11,0($4) |
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| 119 | j $31 |
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| 120 | or $2,$2,$8 |
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| 121 | END (__mpn_add_n) |
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| 122 | |
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