| /* mips3 rshift |
| * |
| * Copyright (C) 1995, 1998, 2000 |
| * 2001, 2002 Free Software Foundation, Inc. |
| * |
| * This file is part of Libgcrypt. |
| * |
| * Libgcrypt 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. |
| * |
| * Libgcrypt 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 this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
| */ |
| |
| /******************* |
| * mpi_limb_t |
| * _gcry_mpih_rshift( mpi_ptr_t wp, ($4) |
| * mpi_ptr_t up, ($5) |
| * mpi_size_t usize, ($6) |
| * unsigned cnt) ($7) |
| */ |
| |
| .text |
| .align 2 |
| .globl _gcry_mpih_rshift |
| .ent _gcry_mpih_rshift |
| _gcry_mpih_rshift: |
| .set noreorder |
| .set nomacro |
| |
| ld $10,0($5) # load first limb |
| dsubu $13,$0,$7 |
| daddiu $6,$6,-1 |
| and $9,$6,4-1 # number of limbs in first loop |
| beq $9,$0,.L0 # if multiple of 4 limbs, skip first loop |
| dsll $2,$10,$13 # compute function result |
| |
| dsubu $6,$6,$9 |
| |
| .Loop0: ld $3,8($5) |
| daddiu $4,$4,8 |
| daddiu $5,$5,8 |
| daddiu $9,$9,-1 |
| dsrl $11,$10,$7 |
| dsll $12,$3,$13 |
| move $10,$3 |
| or $8,$11,$12 |
| bne $9,$0,.Loop0 |
| sd $8,-8($4) |
| |
| .L0: beq $6,$0,.Lend |
| nop |
| |
| .Loop: ld $3,8($5) |
| daddiu $4,$4,32 |
| daddiu $6,$6,-4 |
| dsrl $11,$10,$7 |
| dsll $12,$3,$13 |
| |
| ld $10,16($5) |
| dsrl $14,$3,$7 |
| or $8,$11,$12 |
| sd $8,-32($4) |
| dsll $9,$10,$13 |
| |
| ld $3,24($5) |
| dsrl $11,$10,$7 |
| or $8,$14,$9 |
| sd $8,-24($4) |
| dsll $12,$3,$13 |
| |
| ld $10,32($5) |
| dsrl $14,$3,$7 |
| or $8,$11,$12 |
| sd $8,-16($4) |
| dsll $9,$10,$13 |
| |
| daddiu $5,$5,32 |
| or $8,$14,$9 |
| bgtz $6,.Loop |
| sd $8,-8($4) |
| |
| .Lend: dsrl $8,$10,$7 |
| j $31 |
| sd $8,0($4) |
| .end _gcry_mpih_rshift |
| |
