git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| a334319f UD |
1 | /* MIPS2 __mpn_rshift -- |
| 2 | ||
| 3 | Copyright (C) 1995, 2000, 2002, 2003 Free Software Foundation, Inc. | |
| 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 | |
| 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 | |
| 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 | |
| 14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public | |
| 15 | License for more details. | |
| 16 | ||
| 17 | You should have received a copy of the GNU Lesser General Public License | |
| 18 | along with the GNU MP Library; see the file COPYING.LIB. If not, write to | |
| 19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
| 20 | MA 02111-1307, USA. */ | |
| 21 | ||
| 22 | #include <sysdep.h> | |
| 23 | ||
| 24 | /* INPUT PARAMETERS | |
| 25 | res_ptr $4 | |
| 26 | src_ptr $5 | |
| 27 | size $6 | |
| 28 | cnt $7 | |
| 29 | */ | |
| 30 | #ifdef __PIC__ | |
| 31 | .option pic2 | |
| 32 | #endif | |
| 33 | ENTRY (__mpn_rshift) | |
| 34 | .set noreorder | |
| 35 | #ifdef __PIC__ | |
| 36 | .cpload t9 | |
| 37 | #endif | |
| 38 | .set nomacro | |
| 39 | ||
| 40 | lw $10,0($5) /* load first limb */ | |
| 41 | subu $13,$0,$7 | |
| 42 | addiu $6,$6,-1 | |
| 43 | and $9,$6,4-1 /* number of limbs in first loop */ | |
| 44 | beq $9,$0,L(L0) /* if multiple of 4 limbs, skip first loop*/ | |
| 45 | sll $2,$10,$13 /* compute function result */ | |
| 46 | ||
| 47 | subu $6,$6,$9 | |
| 48 | ||
| 49 | L(Loop0): lw $3,4($5) | |
| 50 | addiu $4,$4,4 | |
| 51 | addiu $5,$5,4 | |
| 52 | addiu $9,$9,-1 | |
| 53 | srl $11,$10,$7 | |
| 54 | sll $12,$3,$13 | |
| 55 | move $10,$3 | |
| 56 | or $8,$11,$12 | |
| 57 | bne $9,$0,L(Loop0) | |
| 58 | sw $8,-4($4) | |
| 59 | ||
| 60 | L(L0): beq $6,$0,L(Lend) | |
| 61 | nop | |
| 62 | ||
| 63 | L(Loop): lw $3,4($5) | |
| 64 | addiu $4,$4,16 | |
| 65 | addiu $6,$6,-4 | |
| 66 | srl $11,$10,$7 | |
| 67 | sll $12,$3,$13 | |
| 68 | ||
| 69 | lw $10,8($5) | |
| 70 | srl $14,$3,$7 | |
| 71 | or $8,$11,$12 | |
| 72 | sw $8,-16($4) | |
| 73 | sll $9,$10,$13 | |
| 74 | ||
| 75 | lw $3,12($5) | |
| 76 | srl $11,$10,$7 | |
| 77 | or $8,$14,$9 | |
| 78 | sw $8,-12($4) | |
| 79 | sll $12,$3,$13 | |
| 80 | ||
| 81 | lw $10,16($5) | |
| 82 | srl $14,$3,$7 | |
| 83 | or $8,$11,$12 | |
| 84 | sw $8,-8($4) | |
| 85 | sll $9,$10,$13 | |
| 86 | ||
| 87 | addiu $5,$5,16 | |
| 88 | or $8,$14,$9 | |
| 89 | bgtz $6,L(Loop) | |
| 90 | sw $8,-4($4) | |
| 91 | ||
| 92 | L(Lend): srl $8,$10,$7 | |
| 93 | j $31 | |
| 94 | sw $8,0($4) | |
| 95 | END (__mpn_rshift) |