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

1.1     ! maekawa     1: # PowerPC-32 __mpn_lshift --
        !             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_lshift
        !            33:        .globl  .__mpn_lshift
        !            34:        .csect  __mpn_lshift[DS]
        !            35: __mpn_lshift:
        !            36:        .long   .__mpn_lshift,  TOC[tc0],       0
        !            37:        .csect  .text[PR]
        !            38: .__mpn_lshift:
        !            39:        mtctr   5               # copy size into CTR
        !            40:        slwi    0,5,2
        !            41:        add     7,3,0           # make r7 point at end of res
        !            42:        add     4,4,0           # make r4 point at end of s1
        !            43:        subfic  8,6,32
        !            44:        lwzu    11,-4(4)        # load first s1 limb
        !            45:        srw     3,11,8          # compute function return value
        !            46:        bdz     Lend1
        !            47:
        !            48: Loop:  lwzu    10,-4(4)
        !            49:        slw     9,11,6
        !            50:        srw     12,10,8
        !            51:        or      9,9,12
        !            52:        stwu    9,-4(7)
        !            53:        bdz     Lend2
        !            54:        lwzu    11,-4(4)
        !            55:        slw     9,10,6
        !            56:        srw     12,11,8
        !            57:        or      9,9,12
        !            58:        stwu    9,-4(7)
        !            59:        bdnz    Loop
        !            60:
        !            61: Lend1: slw     0,11,6
        !            62:        stw     0,-4(7)
        !            63:        blr
        !            64:
        !            65: Lend2: slw     0,10,6
        !            66:        stw     0,-4(7)
        !            67:        blr