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Annotation of OpenXM_contrib/gmp/mpn/clipper/sub_n.s, Revision 1.1

1.1     ! maekawa     1: ; Clipper __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
        !             2: ; store difference in a third limb vector.
        !             3:
        !             4: ; Copyright (C) 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: .text
        !            24:        .align 16
        !            25: .globl ___mpn_sub_n
        !            26: ___mpn_sub_n:
        !            27:        subq    $8,sp
        !            28:        storw   r6,(sp)
        !            29:        loadw   12(sp),r2
        !            30:        loadw   16(sp),r3
        !            31:        loadq   $0,r6           ; clear carry-save register
        !            32:
        !            33: .Loop: loadw   (r1),r4
        !            34:        loadw   (r2),r5
        !            35:        addwc   r6,r6           ; restore carry from r6
        !            36:        subwc   r5,r4
        !            37:        storw   r4,(r0)
        !            38:        subwc   r6,r6           ; save carry in r6
        !            39:        addq    $4,r0
        !            40:        addq    $4,r1
        !            41:        addq    $4,r2
        !            42:        subq    $1,r3
        !            43:        brne    .Loop
        !            44:
        !            45:        negw    r6,r0
        !            46:        loadw   (sp),r6
        !            47:        addq    $8,sp
        !            48:        ret     sp