projects / thirdparty / glibc.git / blame
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1 | # Alpha EV5 __mpn_rshift -- |
| 2 | ||
| 2b778ceb | 3 | # Copyright (C) 1994-2021 Free Software Foundation, Inc. |
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4 | |
| 5 | # This file is part of the GNU MP Library. | |
| 6 | ||
| 7 | # The GNU MP Library is free software; you can redistribute it and/or modify | |
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8 | # it under the terms of the GNU Lesser General Public License as published by |
| 9 | # the Free Software Foundation; either version 2.1 of the License, or (at your | |
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10 | # option) any later version. |
| 11 | ||
| 12 | # The GNU MP Library is distributed in the hope that it will be useful, but | |
| 13 | # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| f01ec467 | 14 | # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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15 | # License for more details. |
| 16 | ||
| f01ec467 | 17 | # You should have received a copy of the GNU Lesser General Public License |
| 5a82c748 | 18 | # along with the GNU MP Library. If not, see <https://www.gnu.org/licenses/>. |
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19 | |
| 20 | ||
| 21 | # INPUT PARAMETERS | |
| 22 | # res_ptr r16 | |
| 23 | # s1_ptr r17 | |
| 24 | # size r18 | |
| 25 | # cnt r19 | |
| 26 | ||
| 3de9f02e | 27 | # This code runs at 3.25 cycles/limb on the EV5. |
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28 | |
| 29 | .set noreorder | |
| 30 | .set noat | |
| 31 | .text | |
| 32 | .align 3 | |
| 33 | .globl __mpn_rshift | |
| 34 | .ent __mpn_rshift | |
| 35 | __mpn_rshift: | |
| 36 | .frame $30,0,$26,0 | |
| 37 | ||
| 38 | ldq $4,0($17) # load first limb | |
| 39 | subq $31,$19,$20 | |
| 40 | subq $18,1,$18 | |
| 41 | and $18,4-1,$28 # number of limbs in first loop | |
| 42 | sll $4,$20,$0 # compute function result | |
| 43 | ||
| 3de9f02e | 44 | beq $28,.L0 |
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45 | subq $18,$28,$18 |
| 46 | ||
| 47 | .align 3 | |
| 3de9f02e | 48 | .Loop0: ldq $3,8($17) |
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49 | addq $16,8,$16 |
| 50 | srl $4,$19,$5 | |
| 51 | addq $17,8,$17 | |
| 52 | subq $28,1,$28 | |
| 53 | sll $3,$20,$6 | |
| 54 | or $3,$3,$4 | |
| 55 | or $5,$6,$8 | |
| 56 | stq $8,-8($16) | |
| 3de9f02e | 57 | bne $28,.Loop0 |
| 7def3d92 | 58 | |
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59 | .L0: srl $4,$19,$24 |
| 60 | beq $18,.Lend | |
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61 | # warm up phase 1 |
| 62 | ldq $1,8($17) | |
| 63 | subq $18,4,$18 | |
| 64 | ldq $2,16($17) | |
| 65 | ldq $3,24($17) | |
| 66 | ldq $4,32($17) | |
| 3de9f02e | 67 | beq $18,.Lend1 |
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68 | # warm up phase 2 |
| 69 | sll $1,$20,$7 | |
| 70 | srl $1,$19,$21 | |
| 71 | sll $2,$20,$8 | |
| 72 | ldq $1,40($17) | |
| 73 | srl $2,$19,$22 | |
| 74 | ldq $2,48($17) | |
| 75 | sll $3,$20,$5 | |
| 76 | or $7,$24,$7 | |
| 77 | srl $3,$19,$23 | |
| 78 | or $8,$21,$8 | |
| 79 | sll $4,$20,$6 | |
| 80 | ldq $3,56($17) | |
| 81 | srl $4,$19,$24 | |
| 82 | ldq $4,64($17) | |
| 83 | subq $18,4,$18 | |
| 3de9f02e | 84 | beq $18,.Lend2 |
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85 | .align 4 |
| 86 | # main loop | |
| 3de9f02e | 87 | .Loop: stq $7,0($16) |
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88 | or $5,$22,$5 |
| 89 | stq $8,8($16) | |
| 90 | or $6,$23,$6 | |
| 91 | ||
| 92 | sll $1,$20,$7 | |
| 93 | subq $18,4,$18 | |
| 94 | srl $1,$19,$21 | |
| 95 | unop # ldq $31,-96($17) | |
| 96 | ||
| 97 | sll $2,$20,$8 | |
| 98 | ldq $1,72($17) | |
| 99 | srl $2,$19,$22 | |
| 100 | ldq $2,80($17) | |
| 101 | ||
| 102 | stq $5,16($16) | |
| 103 | or $7,$24,$7 | |
| 104 | stq $6,24($16) | |
| 105 | or $8,$21,$8 | |
| 106 | ||
| 107 | sll $3,$20,$5 | |
| 108 | unop # ldq $31,-96($17) | |
| 109 | srl $3,$19,$23 | |
| 110 | addq $16,32,$16 | |
| 111 | ||
| 112 | sll $4,$20,$6 | |
| 113 | ldq $3,88($17) | |
| 114 | srl $4,$19,$24 | |
| 115 | ldq $4,96($17) | |
| 116 | ||
| 117 | addq $17,32,$17 | |
| 3de9f02e | 118 | bne $18,.Loop |
| 7def3d92 | 119 | # cool down phase 2/1 |
| 3de9f02e | 120 | .Lend2: stq $7,0($16) |
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121 | or $5,$22,$5 |
| 122 | stq $8,8($16) | |
| 123 | or $6,$23,$6 | |
| 124 | sll $1,$20,$7 | |
| 125 | srl $1,$19,$21 | |
| 126 | sll $2,$20,$8 | |
| 127 | srl $2,$19,$22 | |
| 128 | stq $5,16($16) | |
| 129 | or $7,$24,$7 | |
| 130 | stq $6,24($16) | |
| 131 | or $8,$21,$8 | |
| 132 | sll $3,$20,$5 | |
| 133 | srl $3,$19,$23 | |
| 134 | sll $4,$20,$6 | |
| 135 | srl $4,$19,$24 | |
| 136 | # cool down phase 2/2 | |
| 137 | stq $7,32($16) | |
| 138 | or $5,$22,$5 | |
| 139 | stq $8,40($16) | |
| 140 | or $6,$23,$6 | |
| 141 | stq $5,48($16) | |
| 142 | stq $6,56($16) | |
| 143 | # cool down phase 2/3 | |
| 144 | stq $24,64($16) | |
| 145 | ret $31,($26),1 | |
| 146 | ||
| 147 | # cool down phase 1/1 | |
| 3de9f02e | 148 | .Lend1: sll $1,$20,$7 |
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149 | srl $1,$19,$21 |
| 150 | sll $2,$20,$8 | |
| 151 | srl $2,$19,$22 | |
| 152 | sll $3,$20,$5 | |
| 153 | or $7,$24,$7 | |
| 154 | srl $3,$19,$23 | |
| 155 | or $8,$21,$8 | |
| 156 | sll $4,$20,$6 | |
| 157 | srl $4,$19,$24 | |
| 158 | # cool down phase 1/2 | |
| 159 | stq $7,0($16) | |
| 160 | or $5,$22,$5 | |
| 161 | stq $8,8($16) | |
| 162 | or $6,$23,$6 | |
| 163 | stq $5,16($16) | |
| 164 | stq $6,24($16) | |
| 165 | stq $24,32($16) | |
| 166 | ret $31,($26),1 | |
| 167 | ||
| 3de9f02e | 168 | .Lend: stq $24,0($16) |
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169 | ret $31,($26),1 |
| 170 | .end __mpn_rshift |