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Annotation of OpenXM_contrib/gmp/mpn/powerpc32/rshift.s, Revision 1.1.1.1

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