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

1.1       maekawa     1:  # MIPS2 __mpn_lshift --
                      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_lshift
                     32:        .ent    __mpn_lshift
                     33: __mpn_lshift:
                     34:        .set    noreorder
                     35:        .set    nomacro
                     36:
                     37:        sll     $2,$6,2
                     38:        addu    $5,$5,$2        # make r5 point at end of src
                     39:        lw      $10,-4($5)      # load first limb
                     40:        subu    $13,$0,$7
                     41:        addu    $4,$4,$2        # make r4 point at end of res
                     42:        addiu   $6,$6,-1
                     43:        and     $9,$6,4-1       # number of limbs in first loop
                     44:        beq     $9,$0,.L0       # if multiple of 4 limbs, skip first loop
                     45:         srl    $2,$10,$13      # compute function result
                     46:
                     47:        subu    $6,$6,$9
                     48:
                     49: .Loop0:        lw      $3,-8($5)
                     50:        addiu   $4,$4,-4
                     51:        addiu   $5,$5,-4
                     52:        addiu   $9,$9,-1
                     53:        sll     $11,$10,$7
                     54:        srl     $12,$3,$13
                     55:        move    $10,$3
                     56:        or      $8,$11,$12
                     57:        bne     $9,$0,.Loop0
                     58:         sw     $8,0($4)
                     59:
                     60: .L0:   beq     $6,$0,.Lend
                     61:         nop
                     62:
                     63: .Loop: lw      $3,-8($5)
                     64:        addiu   $4,$4,-16
                     65:        addiu   $6,$6,-4
                     66:        sll     $11,$10,$7
                     67:        srl     $12,$3,$13
                     68:
                     69:        lw      $10,-12($5)
                     70:        sll     $14,$3,$7
                     71:        or      $8,$11,$12
                     72:        sw      $8,12($4)
                     73:        srl     $9,$10,$13
                     74:
                     75:        lw      $3,-16($5)
                     76:        sll     $11,$10,$7
                     77:        or      $8,$14,$9
                     78:        sw      $8,8($4)
                     79:        srl     $12,$3,$13
                     80:
                     81:        lw      $10,-20($5)
                     82:        sll     $14,$3,$7
                     83:        or      $8,$11,$12
                     84:        sw      $8,4($4)
                     85:        srl     $9,$10,$13
                     86:
                     87:        addiu   $5,$5,-16
                     88:        or      $8,$14,$9
                     89:        bgtz    $6,.Loop
                     90:         sw     $8,0($4)
                     91:
                     92: .Lend: sll     $8,$10,$7
                     93:        j       $31
                     94:        sw      $8,-4($4)
                     95:        .end    __mpn_lshift