| /* MIPS2 __mpn_lshift -- |
| |
| Copyright (C) 1995-2016 Free Software Foundation, Inc. |
| |
| This file is part of the GNU MP Library. |
| |
| The GNU MP Library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or (at your |
| option) any later version. |
| |
| The GNU MP Library is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with the GNU MP Library. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| |
| /* INPUT PARAMETERS |
| res_ptr $4 |
| src_ptr $5 |
| size $6 |
| cnt $7 |
| */ |
| #ifdef __PIC__ |
| .option pic2 |
| #endif |
| ENTRY (__mpn_lshift) |
| .set noreorder |
| #ifdef __PIC__ |
| .cpload t9 |
| #endif |
| .set nomacro |
| |
| sll $2,$6,2 |
| addu $5,$5,$2 /* make r5 point at end of src */ |
| lw $10,-4($5) /* load first limb */ |
| subu $13,$0,$7 |
| addu $4,$4,$2 /* make r4 point at end of res */ |
| addiu $6,$6,-1 |
| and $9,$6,4-1 /* number of limbs in first loop */ |
| beq $9,$0,L(L0) /* if multiple of 4 limbs, skip first loop */ |
| srl $2,$10,$13 /* compute function result */ |
| |
| subu $6,$6,$9 |
| |
| L(Loop0): lw $3,-8($5) |
| addiu $4,$4,-4 |
| addiu $5,$5,-4 |
| addiu $9,$9,-1 |
| sll $11,$10,$7 |
| srl $12,$3,$13 |
| move $10,$3 |
| or $8,$11,$12 |
| bne $9,$0,L(Loop0) |
| sw $8,0($4) |
| |
| L(L0): beq $6,$0,L(Lend) |
| nop |
| |
| L(Loop): lw $3,-8($5) |
| addiu $4,$4,-16 |
| addiu $6,$6,-4 |
| sll $11,$10,$7 |
| srl $12,$3,$13 |
| |
| lw $10,-12($5) |
| sll $14,$3,$7 |
| or $8,$11,$12 |
| sw $8,12($4) |
| srl $9,$10,$13 |
| |
| lw $3,-16($5) |
| sll $11,$10,$7 |
| or $8,$14,$9 |
| sw $8,8($4) |
| srl $12,$3,$13 |
| |
| lw $10,-20($5) |
| sll $14,$3,$7 |
| or $8,$11,$12 |
| sw $8,4($4) |
| srl $9,$10,$13 |
| |
| addiu $5,$5,-16 |
| or $8,$14,$9 |
| bgtz $6,L(Loop) |
| sw $8,0($4) |
| |
| L(Lend): sll $8,$10,$7 |
| j $31 |
| sw $8,-4($4) |
| END (__mpn_lshift) |