projects / thirdparty / glibc.git / blame
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|---|---|---|
| d0c2d3b3 UD |
1 | /* MIPS3 __mpn_rshift -- |
| 2 | * | |
| d4697bc9 | 3 | * Copyright (C) 1995-2014 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 |
| d0c2d3b3 UD |
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_rshift) |
| 5494bc3a | 36 | #ifdef __PIC__ |
| 3e9a9758 | 37 | SETUP_GP /* ??? unused */ |
| d0c2d3b3 | 38 | #endif |
| 3e9a9758 | 39 | .set noreorder |
| d0c2d3b3 UD |
40 | .set nomacro |
| 41 | ||
| 42 | ld $10,0($5) # load first limb | |
| 43 | dsubu $13,$0,$7 | |
| 44 | daddiu $6,$6,-1 | |
| 45 | and $9,$6,4-1 # number of limbs in first loop | |
| 3e9a9758 RM |
46 | beq $9,$0,L(L0) # if multiple of 4 limbs, skip first loop |
| 47 | dsll $2,$10,$13 # compute function result | |
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48 | |
| 49 | dsubu $6,$6,$9 | |
| 50 | ||
| 3e9a9758 | 51 | L(Loop0): ld $3,8($5) |
| d0c2d3b3 UD |
52 | daddiu $4,$4,8 |
| 53 | daddiu $5,$5,8 | |
| 54 | daddiu $9,$9,-1 | |
| 55 | dsrl $11,$10,$7 | |
| 56 | dsll $12,$3,$13 | |
| 57 | move $10,$3 | |
| 58 | or $8,$11,$12 | |
| 3e9a9758 RM |
59 | bne $9,$0,L(Loop0) |
| 60 | sd $8,-8($4) | |
| d0c2d3b3 | 61 | |
| 3e9a9758 RM |
62 | L(L0): beq $6,$0,L(Lend) |
| 63 | nop | |
| d0c2d3b3 | 64 | |
| 3e9a9758 | 65 | L(Loop): ld $3,8($5) |
| d0c2d3b3 UD |
66 | daddiu $4,$4,32 |
| 67 | daddiu $6,$6,-4 | |
| 68 | dsrl $11,$10,$7 | |
| 69 | dsll $12,$3,$13 | |
| 70 | ||
| 71 | ld $10,16($5) | |
| 72 | dsrl $14,$3,$7 | |
| 73 | or $8,$11,$12 | |
| 74 | sd $8,-32($4) | |
| 75 | dsll $9,$10,$13 | |
| 76 | ||
| 77 | ld $3,24($5) | |
| 78 | dsrl $11,$10,$7 | |
| 79 | or $8,$14,$9 | |
| 80 | sd $8,-24($4) | |
| 81 | dsll $12,$3,$13 | |
| 82 | ||
| 83 | ld $10,32($5) | |
| 84 | dsrl $14,$3,$7 | |
| 85 | or $8,$11,$12 | |
| 86 | sd $8,-16($4) | |
| 87 | dsll $9,$10,$13 | |
| 88 | ||
| 89 | daddiu $5,$5,32 | |
| 90 | or $8,$14,$9 | |
| 3e9a9758 RM |
91 | bgtz $6,L(Loop) |
| 92 | sd $8,-8($4) | |
| d0c2d3b3 | 93 | |
| 3e9a9758 | 94 | L(Lend): dsrl $8,$10,$7 |
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95 | j $31 |
| 96 | sd $8,0($4) | |
| a6ee1783 | 97 | END (__mpn_rshift) |