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Annotation of OpenXM/src/kan96xx/gmp-2.0.2-ssh-2/mpn/alpha/ev5/lshift.s, Revision 1.1.1.1

1.1       takayama    1:  # Alpha EV5 __mpn_lshift --
                      2:
                      3:  # Copyright (C) 1994, 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     r16
                     25:  # s1_ptr      r17
                     26:  # size                r18
                     27:  # cnt         r19
                     28:
                     29:  # This code runs at 3.25 cycles/limb on the EV5.
                     30:
                     31:        .set    noreorder
                     32:        .set    noat
                     33: .text
                     34:        .align  3
                     35:        .globl  __mpn_lshift
                     36:        .ent    __mpn_lshift
                     37: __mpn_lshift:
                     38:        .frame  $30,0,$26,0
                     39:
                     40:        s8addq  $18,$17,$17     # make r17 point at end of s1
                     41:        ldq     $4,-8($17)      # load first limb
                     42:        subq    $31,$19,$20
                     43:        s8addq  $18,$16,$16     # make r16 point at end of RES
                     44:        subq    $18,1,$18
                     45:        and     $18,4-1,$28     # number of limbs in first loop
                     46:        srl     $4,$20,$0       # compute function result
                     47:
                     48:        beq     $28,.L0
                     49:        subq    $18,$28,$18
                     50:
                     51:        .align  3
                     52: .Loop0:        ldq     $3,-16($17)
                     53:        subq    $16,8,$16
                     54:        sll     $4,$19,$5
                     55:        subq    $17,8,$17
                     56:        subq    $28,1,$28
                     57:        srl     $3,$20,$6
                     58:        or      $3,$3,$4
                     59:        or      $5,$6,$8
                     60:        stq     $8,0($16)
                     61:        bne     $28,.Loop0
                     62:
                     63: .L0:   sll     $4,$19,$24
                     64:        beq     $18,.Lend
                     65:  # warm up phase 1
                     66:        ldq     $1,-16($17)
                     67:        subq    $18,4,$18
                     68:        ldq     $2,-24($17)
                     69:        ldq     $3,-32($17)
                     70:        ldq     $4,-40($17)
                     71:        beq     $18,.Lend1
                     72:  # warm up phase 2
                     73:        srl     $1,$20,$7
                     74:        sll     $1,$19,$21
                     75:        srl     $2,$20,$8
                     76:        ldq     $1,-48($17)
                     77:        sll     $2,$19,$22
                     78:        ldq     $2,-56($17)
                     79:        srl     $3,$20,$5
                     80:        or      $7,$24,$7
                     81:        sll     $3,$19,$23
                     82:        or      $8,$21,$8
                     83:        srl     $4,$20,$6
                     84:        ldq     $3,-64($17)
                     85:        sll     $4,$19,$24
                     86:        ldq     $4,-72($17)
                     87:        subq    $18,4,$18
                     88:        beq     $18,.Lend2
                     89:        .align  4
                     90:  # main loop
                     91: .Loop: stq     $7,-8($16)
                     92:        or      $5,$22,$5
                     93:        stq     $8,-16($16)
                     94:        or      $6,$23,$6
                     95:
                     96:        srl     $1,$20,$7
                     97:        subq    $18,4,$18
                     98:        sll     $1,$19,$21
                     99:        unop    # ldq   $31,-96($17)
                    100:
                    101:        srl     $2,$20,$8
                    102:        ldq     $1,-80($17)
                    103:        sll     $2,$19,$22
                    104:        ldq     $2,-88($17)
                    105:
                    106:        stq     $5,-24($16)
                    107:        or      $7,$24,$7
                    108:        stq     $6,-32($16)
                    109:        or      $8,$21,$8
                    110:
                    111:        srl     $3,$20,$5
                    112:        unop    # ldq   $31,-96($17)
                    113:        sll     $3,$19,$23
                    114:        subq    $16,32,$16
                    115:
                    116:        srl     $4,$20,$6
                    117:        ldq     $3,-96($17)
                    118:        sll     $4,$19,$24
                    119:        ldq     $4,-104($17)
                    120:
                    121:        subq    $17,32,$17
                    122:        bne     $18,.Loop
                    123:  # cool down phase 2/1
                    124: .Lend2:        stq     $7,-8($16)
                    125:        or      $5,$22,$5
                    126:        stq     $8,-16($16)
                    127:        or      $6,$23,$6
                    128:        srl     $1,$20,$7
                    129:        sll     $1,$19,$21
                    130:        srl     $2,$20,$8
                    131:        sll     $2,$19,$22
                    132:        stq     $5,-24($16)
                    133:        or      $7,$24,$7
                    134:        stq     $6,-32($16)
                    135:        or      $8,$21,$8
                    136:        srl     $3,$20,$5
                    137:        sll     $3,$19,$23
                    138:        srl     $4,$20,$6
                    139:        sll     $4,$19,$24
                    140:  # cool down phase 2/2
                    141:        stq     $7,-40($16)
                    142:        or      $5,$22,$5
                    143:        stq     $8,-48($16)
                    144:        or      $6,$23,$6
                    145:        stq     $5,-56($16)
                    146:        stq     $6,-64($16)
                    147:  # cool down phase 2/3
                    148:        stq     $24,-72($16)
                    149:        ret     $31,($26),1
                    150:
                    151:  # cool down phase 1/1
                    152: .Lend1:        srl     $1,$20,$7
                    153:        sll     $1,$19,$21
                    154:        srl     $2,$20,$8
                    155:        sll     $2,$19,$22
                    156:        srl     $3,$20,$5
                    157:        or      $7,$24,$7
                    158:        sll     $3,$19,$23
                    159:        or      $8,$21,$8
                    160:        srl     $4,$20,$6
                    161:        sll     $4,$19,$24
                    162:  # cool down phase 1/2
                    163:        stq     $7,-8($16)
                    164:        or      $5,$22,$5
                    165:        stq     $8,-16($16)
                    166:        or      $6,$23,$6
                    167:        stq     $5,-24($16)
                    168:        stq     $6,-32($16)
                    169:        stq     $24,-40($16)
                    170:        ret     $31,($26),1
                    171:
                    172: .Lend: stq     $24,-8($16)
                    173:        ret     $31,($26),1
                    174:        .end    __mpn_lshift

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