projects / thirdparty / glibc.git / blame
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1 | /* MIPS2 __mpn_lshift -- |
| 2 | ||
| d614a753 | 3 | Copyright (C) 1995-2020 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 |
| ab84e3ff | 18 | along with the GNU MP Library. If not, see |
| 5a82c748 | 19 | <https://www.gnu.org/licenses/>. */ |
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20 | |
| 21 | #include <sysdep.h> | |
| 22 | ||
| 23 | /* INPUT PARAMETERS | |
| 24 | res_ptr $4 | |
| 25 | src_ptr $5 | |
| 26 | size $6 | |
| 27 | cnt $7 | |
| 28 | */ | |
| b5e0b658 | 29 | #ifdef __PIC__ |
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30 | .option pic2 |
| 31 | #endif | |
| 32 | ENTRY (__mpn_lshift) | |
| 33 | .set noreorder | |
| b5e0b658 | 34 | #ifdef __PIC__ |
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35 | .cpload t9 |
| 36 | #endif | |
| 37 | .set nomacro | |
| 38 | ||
| 39 | sll $2,$6,2 | |
| 40 | addu $5,$5,$2 /* make r5 point at end of src */ | |
| 41 | lw $10,-4($5) /* load first limb */ | |
| 42 | subu $13,$0,$7 | |
| 43 | addu $4,$4,$2 /* make r4 point at end of res */ | |
| 44 | addiu $6,$6,-1 | |
| 45 | and $9,$6,4-1 /* number of limbs in first loop */ | |
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46 | beq $9,$0,L(L0) /* if multiple of 4 limbs, skip first loop */ |
| 47 | srl $2,$10,$13 /* compute function result */ | |
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48 | |
| 49 | subu $6,$6,$9 | |
| 50 | ||
| 3e9a9758 | 51 | L(Loop0): lw $3,-8($5) |
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52 | addiu $4,$4,-4 |
| 53 | addiu $5,$5,-4 | |
| 54 | addiu $9,$9,-1 | |
| 55 | sll $11,$10,$7 | |
| 56 | srl $12,$3,$13 | |
| 57 | move $10,$3 | |
| 58 | or $8,$11,$12 | |
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59 | bne $9,$0,L(Loop0) |
| 60 | sw $8,0($4) | |
| bcb5cee0 | 61 | |
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62 | L(L0): beq $6,$0,L(Lend) |
| 63 | nop | |
| bcb5cee0 | 64 | |
| 3e9a9758 | 65 | L(Loop): lw $3,-8($5) |
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66 | addiu $4,$4,-16 |
| 67 | addiu $6,$6,-4 | |
| 68 | sll $11,$10,$7 | |
| 69 | srl $12,$3,$13 | |
| 70 | ||
| 71 | lw $10,-12($5) | |
| 72 | sll $14,$3,$7 | |
| 73 | or $8,$11,$12 | |
| 74 | sw $8,12($4) | |
| 75 | srl $9,$10,$13 | |
| 76 | ||
| 77 | lw $3,-16($5) | |
| 78 | sll $11,$10,$7 | |
| 79 | or $8,$14,$9 | |
| 80 | sw $8,8($4) | |
| 81 | srl $12,$3,$13 | |
| 82 | ||
| 83 | lw $10,-20($5) | |
| 84 | sll $14,$3,$7 | |
| 85 | or $8,$11,$12 | |
| 86 | sw $8,4($4) | |
| 87 | srl $9,$10,$13 | |
| 88 | ||
| 89 | addiu $5,$5,-16 | |
| 90 | or $8,$14,$9 | |
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91 | bgtz $6,L(Loop) |
| 92 | sw $8,0($4) | |
| bcb5cee0 | 93 | |
| 3e9a9758 | 94 | L(Lend): sll $8,$10,$7 |
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95 | j $31 |
| 96 | sw $8,-4($4) | |
| 2cf8794a | 97 | END (__mpn_lshift) |