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Annotation of OpenXM_contrib/gmp/mpn/mips2/rshift.s, Revision 1.1.1.1

1.1       maekawa     1:  # MIPS2 __mpn_rshift --
                      2:
                      3:  # Copyright (C) 1995 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 Library General Public License as published by
                      9:  # the Free Software Foundation; either version 2 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 Library General Public
                     15:  # License for more details.
                     16:
                     17:  # You should have received a copy of the GNU Library 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:
                     23:  # INPUT PARAMETERS
                     24:  # res_ptr     $4
                     25:  # src_ptr     $5
                     26:  # size                $6
                     27:  # cnt         $7
                     28:
                     29:        .text
                     30:        .align  2
                     31:        .globl  __mpn_rshift
                     32:        .ent    __mpn_rshift
                     33: __mpn_rshift:
                     34:        .set    noreorder
                     35:        .set    nomacro
                     36:
                     37:        lw      $10,0($5)       # load first limb
                     38:        subu    $13,$0,$7
                     39:        addiu   $6,$6,-1
                     40:        and     $9,$6,4-1       # number of limbs in first loop
                     41:        beq     $9,$0,.L0       # if multiple of 4 limbs, skip first loop
                     42:         sll    $2,$10,$13      # compute function result
                     43:
                     44:        subu    $6,$6,$9
                     45:
                     46: .Loop0:        lw      $3,4($5)
                     47:        addiu   $4,$4,4
                     48:        addiu   $5,$5,4
                     49:        addiu   $9,$9,-1
                     50:        srl     $11,$10,$7
                     51:        sll     $12,$3,$13
                     52:        move    $10,$3
                     53:        or      $8,$11,$12
                     54:        bne     $9,$0,.Loop0
                     55:         sw     $8,-4($4)
                     56:
                     57: .L0:   beq     $6,$0,.Lend
                     58:         nop
                     59:
                     60: .Loop: lw      $3,4($5)
                     61:        addiu   $4,$4,16
                     62:        addiu   $6,$6,-4
                     63:        srl     $11,$10,$7
                     64:        sll     $12,$3,$13
                     65:
                     66:        lw      $10,8($5)
                     67:        srl     $14,$3,$7
                     68:        or      $8,$11,$12
                     69:        sw      $8,-16($4)
                     70:        sll     $9,$10,$13
                     71:
                     72:        lw      $3,12($5)
                     73:        srl     $11,$10,$7
                     74:        or      $8,$14,$9
                     75:        sw      $8,-12($4)
                     76:        sll     $12,$3,$13
                     77:
                     78:        lw      $10,16($5)
                     79:        srl     $14,$3,$7
                     80:        or      $8,$11,$12
                     81:        sw      $8,-8($4)
                     82:        sll     $9,$10,$13
                     83:
                     84:        addiu   $5,$5,16
                     85:        or      $8,$14,$9
                     86:        bgtz    $6,.Loop
                     87:         sw     $8,-4($4)
                     88:
                     89: .Lend: srl     $8,$10,$7
                     90:        j       $31
                     91:        sw      $8,0($4)
                     92:        .end    __mpn_rshift