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Annotation of OpenXM_contrib/gmp/mpn/clipper/sub_n.s, Revision 1.1.1.1

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