projects / thirdparty / glibc.git / blame
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1 | /* MIPS3 __mpn_lshift -- |
| 2 | * | |
| f7a9f785 | 3 | * Copyright (C) 1995-2016 Free Software Foundation, Inc. |
| d0c2d3b3 UD |
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 | |
| f01ec467 AJ |
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 | |
| d0c2d3b3 UD |
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 PE |
18 | * along with the GNU MP Library. If not, see |
| 19 | * <http://www.gnu.org/licenses/>. | |
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20 | */ |
| 21 | ||
| 22 | #include <sysdep.h> | |
| 3e9a9758 | 23 | #include <sys/asm.h> |
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24 | |
| 25 | /* INPUT PARAMETERS | |
| 26 | * res_ptr $4 | |
| 27 | * src_ptr $5 | |
| 28 | * size $6 | |
| 29 | * cnt $7 | |
| 30 | */ | |
| 31 | ||
| 5494bc3a | 32 | #ifdef __PIC__ |
| d0c2d3b3 UD |
33 | .option pic2 |
| 34 | #endif | |
| a6ee1783 | 35 | ENTRY (__mpn_lshift) |
| 5494bc3a | 36 | #ifdef __PIC__ |
| 3e9a9758 | 37 | SETUP_GP /* ??? unused */ |
| d0c2d3b3 | 38 | #endif |
| 3e9a9758 | 39 | .set noreorder |
| d0c2d3b3 UD |
40 | .set nomacro |
| 41 | ||
| 42 | dsll $2,$6,3 | |
| 43 | daddu $5,$5,$2 # make r5 point at end of src | |
| 44 | ld $10,-8($5) # load first limb | |
| 45 | dsubu $13,$0,$7 | |
| 46 | daddu $4,$4,$2 # make r4 point at end of res | |
| 47 | daddiu $6,$6,-1 | |
| 48 | and $9,$6,4-1 # number of limbs in first loop | |
| 3e9a9758 RM |
49 | beq $9,$0,L(L0) # if multiple of 4 limbs, skip first loop |
| 50 | dsrl $2,$10,$13 # compute function result | |
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51 | |
| 52 | dsubu $6,$6,$9 | |
| 53 | ||
| 3e9a9758 | 54 | L(Loop0): ld $3,-16($5) |
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55 | daddiu $4,$4,-8 |
| 56 | daddiu $5,$5,-8 | |
| 57 | daddiu $9,$9,-1 | |
| 58 | dsll $11,$10,$7 | |
| 59 | dsrl $12,$3,$13 | |
| 60 | move $10,$3 | |
| 61 | or $8,$11,$12 | |
| 3e9a9758 RM |
62 | bne $9,$0,L(Loop0) |
| 63 | sd $8,0($4) | |
| d0c2d3b3 | 64 | |
| 3e9a9758 RM |
65 | L(L0): beq $6,$0,L(Lend) |
| 66 | nop | |
| d0c2d3b3 | 67 | |
| 3e9a9758 | 68 | L(Loop): ld $3,-16($5) |
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69 | daddiu $4,$4,-32 |
| 70 | daddiu $6,$6,-4 | |
| 71 | dsll $11,$10,$7 | |
| 72 | dsrl $12,$3,$13 | |
| 73 | ||
| 74 | ld $10,-24($5) | |
| 75 | dsll $14,$3,$7 | |
| 76 | or $8,$11,$12 | |
| 77 | sd $8,24($4) | |
| 78 | dsrl $9,$10,$13 | |
| 79 | ||
| 80 | ld $3,-32($5) | |
| 81 | dsll $11,$10,$7 | |
| 82 | or $8,$14,$9 | |
| 83 | sd $8,16($4) | |
| 84 | dsrl $12,$3,$13 | |
| 85 | ||
| 86 | ld $10,-40($5) | |
| 87 | dsll $14,$3,$7 | |
| 88 | or $8,$11,$12 | |
| 89 | sd $8,8($4) | |
| 90 | dsrl $9,$10,$13 | |
| 91 | ||
| 92 | daddiu $5,$5,-32 | |
| 93 | or $8,$14,$9 | |
| 3e9a9758 RM |
94 | bgtz $6,L(Loop) |
| 95 | sd $8,0($4) | |
| d0c2d3b3 | 96 | |
| 3e9a9758 | 97 | L(Lend): dsll $8,$10,$7 |
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98 | j $31 |
| 99 | sd $8,-8($4) | |
| a6ee1783 | 100 | END (__mpn_lshift) |