| 1 | # Alpha __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and |
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| 2 | # store difference 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 <https://www.gnu.org/licenses/>. |
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| 20 | |
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| 21 | |
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| 22 | # INPUT PARAMETERS |
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| 23 | # res_ptr $16 |
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| 24 | # s1_ptr $17 |
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| 25 | # s2_ptr $18 |
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| 26 | # size $19 |
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| 27 | |
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| 28 | .set noreorder |
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| 29 | .set noat |
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| 30 | .text |
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| 31 | .align 3 |
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| 32 | .globl __mpn_sub_n |
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| 33 | .ent __mpn_sub_n |
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| 34 | __mpn_sub_n: |
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| 35 | .frame $30,0,$26,0 |
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| 36 | |
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| 37 | ldq $3,0($17) |
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| 38 | ldq $4,0($18) |
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| 39 | |
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| 40 | subq $19,1,$19 |
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| 41 | and $19,4-1,$2 # number of limbs in first loop |
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| 42 | bis $31,$31,$0 |
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| 43 | beq $2,.L0 # if multiple of 4 limbs, skip first loop |
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| 44 | |
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| 45 | subq $19,$2,$19 |
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| 46 | |
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| 47 | .Loop0: subq $2,1,$2 |
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| 48 | ldq $5,8($17) |
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| 49 | addq $4,$0,$4 |
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| 50 | ldq $6,8($18) |
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| 51 | cmpult $4,$0,$1 |
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| 52 | subq $3,$4,$4 |
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| 53 | cmpult $3,$4,$0 |
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| 54 | stq $4,0($16) |
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| 55 | or $0,$1,$0 |
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| 56 | |
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| 57 | addq $17,8,$17 |
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| 58 | addq $18,8,$18 |
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| 59 | bis $5,$5,$3 |
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| 60 | bis $6,$6,$4 |
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| 61 | addq $16,8,$16 |
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| 62 | bne $2,.Loop0 |
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| 63 | |
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| 64 | .L0: beq $19,.Lend |
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| 65 | |
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| 66 | .align 3 |
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| 67 | .Loop: subq $19,4,$19 |
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| 68 | |
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| 69 | ldq $5,8($17) |
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| 70 | addq $4,$0,$4 |
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| 71 | ldq $6,8($18) |
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| 72 | cmpult $4,$0,$1 |
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| 73 | subq $3,$4,$4 |
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| 74 | cmpult $3,$4,$0 |
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| 75 | stq $4,0($16) |
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| 76 | or $0,$1,$0 |
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| 77 | |
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| 78 | ldq $3,16($17) |
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| 79 | addq $6,$0,$6 |
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| 80 | ldq $4,16($18) |
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| 81 | cmpult $6,$0,$1 |
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| 82 | subq $5,$6,$6 |
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| 83 | cmpult $5,$6,$0 |
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| 84 | stq $6,8($16) |
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| 85 | or $0,$1,$0 |
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| 86 | |
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| 87 | ldq $5,24($17) |
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| 88 | addq $4,$0,$4 |
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| 89 | ldq $6,24($18) |
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| 90 | cmpult $4,$0,$1 |
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| 91 | subq $3,$4,$4 |
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| 92 | cmpult $3,$4,$0 |
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| 93 | stq $4,16($16) |
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| 94 | or $0,$1,$0 |
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| 95 | |
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| 96 | ldq $3,32($17) |
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| 97 | addq $6,$0,$6 |
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| 98 | ldq $4,32($18) |
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| 99 | cmpult $6,$0,$1 |
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| 100 | subq $5,$6,$6 |
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| 101 | cmpult $5,$6,$0 |
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| 102 | stq $6,24($16) |
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| 103 | or $0,$1,$0 |
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| 104 | |
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| 105 | addq $17,32,$17 |
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| 106 | addq $18,32,$18 |
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| 107 | addq $16,32,$16 |
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| 108 | bne $19,.Loop |
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| 109 | |
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| 110 | .Lend: addq $4,$0,$4 |
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| 111 | cmpult $4,$0,$1 |
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| 112 | subq $3,$4,$4 |
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| 113 | cmpult $3,$4,$0 |
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| 114 | stq $4,0($16) |
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| 115 | or $0,$1,$0 |
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| 116 | ret $31,($26),1 |
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| 117 | |
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| 118 | .end __mpn_sub_n |
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| 119 | |
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