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Annotation of OpenXM_contrib/gmp/mpn/powerpc32/rshift.s, Revision 1.1

1.1     ! maekawa     1: # PowerPC-32 __mpn_rshift --
        !             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      r3
        !            25: # s1_ptr       r4
        !            26: # size         r5
        !            27: # cnt          r6
        !            28:
        !            29:        .toc
        !            30: .csect .text[PR]
        !            31:        .align  2
        !            32:        .globl  __mpn_rshift
        !            33:        .globl  .__mpn_rshift
        !            34:        .csect  __mpn_rshift[DS]
        !            35: __mpn_rshift:
        !            36:        .long   .__mpn_rshift,  TOC[tc0],       0
        !            37:        .csect  .text[PR]
        !            38: .__mpn_rshift:
        !            39:        mtctr   5               # copy size into CTR
        !            40:        addi    7,3,-4          # move adjusted res_ptr to free return reg
        !            41:        subfic  8,6,32
        !            42:        lwz     11,0(4)         # load first s1 limb
        !            43:        slw     3,11,8          # compute function return value
        !            44:        bdz     Lend1
        !            45:
        !            46: Loop:  lwzu    10,4(4)
        !            47:        srw     9,11,6
        !            48:        slw     12,10,8
        !            49:        or      9,9,12
        !            50:        stwu    9,4(7)
        !            51:        bdz     Lend2
        !            52:        lwzu    11,4(4)
        !            53:        srw     9,10,6
        !            54:        slw     12,11,8
        !            55:        or      9,9,12
        !            56:        stwu    9,4(7)
        !            57:        bdnz    Loop
        !            58:
        !            59: Lend1: srw     0,11,6
        !            60:        stw     0,4(7)
        !            61:        blr
        !            62:
        !            63: Lend2: srw     0,10,6
        !            64:        stw     0,4(7)
        !            65:        blr