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Annotation of OpenXM_contrib/gmp/mpn/mips3/submul_1.s, Revision 1.1

1.1     ! maekawa     1:  # MIPS3 __mpn_submul_1 -- Multiply a limb vector with a single limb and
        !             2:  # subtract the product from a second limb vector.
        !             3:
        !             4:  # Copyright (C) 1992, 1994, 1995 Free Software Foundation, Inc.
        !             5:
        !             6:  # This file is part of the GNU MP Library.
        !             7:
        !             8:  # The GNU MP Library is free software; you can redistribute it and/or modify
        !             9:  # it under the terms of the GNU Library General Public License as published by
        !            10:  # the Free Software Foundation; either version 2 of the License, or (at your
        !            11:  # option) any later version.
        !            12:
        !            13:  # The GNU MP Library is distributed in the hope that it will be useful, but
        !            14:  # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            15:  # or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
        !            16:  # License for more details.
        !            17:
        !            18:  # You should have received a copy of the GNU Library General Public License
        !            19:  # along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            20:  # the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            21:  # MA 02111-1307, USA.
        !            22:
        !            23:
        !            24:  # INPUT PARAMETERS
        !            25:  # res_ptr     $4
        !            26:  # s1_ptr      $5
        !            27:  # size                $6
        !            28:  # s2_limb     $7
        !            29:
        !            30:        .text
        !            31:        .align  4
        !            32:        .globl  __mpn_submul_1
        !            33:        .ent    __mpn_submul_1
        !            34: __mpn_submul_1:
        !            35:        .set    noreorder
        !            36:        .set    nomacro
        !            37:
        !            38:  # warm up phase 0
        !            39:        ld      $8,0($5)
        !            40:
        !            41:  # warm up phase 1
        !            42:        daddiu  $5,$5,8
        !            43:        dmultu  $8,$7
        !            44:
        !            45:        daddiu  $6,$6,-1
        !            46:        beq     $6,$0,$LC0
        !            47:         move   $2,$0           # zero cy2
        !            48:
        !            49:        daddiu  $6,$6,-1
        !            50:        beq     $6,$0,$LC1
        !            51:        ld      $8,0($5)        # load new s1 limb as early as possible
        !            52:
        !            53: Loop:  ld      $10,0($4)
        !            54:        mflo    $3
        !            55:        mfhi    $9
        !            56:        daddiu  $5,$5,8
        !            57:        daddu   $3,$3,$2        # add old carry limb to low product limb
        !            58:        dmultu  $8,$7
        !            59:        ld      $8,0($5)        # load new s1 limb as early as possible
        !            60:        daddiu  $6,$6,-1        # decrement loop counter
        !            61:        sltu    $2,$3,$2        # carry from previous addition -> $2
        !            62:        dsubu   $3,$10,$3
        !            63:        sgtu    $10,$3,$10
        !            64:        daddu   $2,$2,$10
        !            65:        sd      $3,0($4)
        !            66:        daddiu  $4,$4,8
        !            67:        bne     $6,$0,Loop
        !            68:         daddu  $2,$9,$2        # add high product limb and carry from addition
        !            69:
        !            70:  # cool down phase 1
        !            71: $LC1:  ld      $10,0($4)
        !            72:        mflo    $3
        !            73:        mfhi    $9
        !            74:        daddu   $3,$3,$2
        !            75:        sltu    $2,$3,$2
        !            76:        dmultu  $8,$7
        !            77:        dsubu   $3,$10,$3
        !            78:        sgtu    $10,$3,$10
        !            79:        daddu   $2,$2,$10
        !            80:        sd      $3,0($4)
        !            81:        daddiu  $4,$4,8
        !            82:        daddu   $2,$9,$2        # add high product limb and carry from addition
        !            83:
        !            84:  # cool down phase 0
        !            85: $LC0:  ld      $10,0($4)
        !            86:        mflo    $3
        !            87:        mfhi    $9
        !            88:        daddu   $3,$3,$2
        !            89:        sltu    $2,$3,$2
        !            90:        dsubu   $3,$10,$3
        !            91:        sgtu    $10,$3,$10
        !            92:        daddu   $2,$2,$10
        !            93:        sd      $3,0($4)
        !            94:        j       $31
        !            95:        daddu   $2,$9,$2        # add high product limb and carry from addition
        !            96:
        !            97:        .end    __mpn_submul_1