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Annotation of OpenXM_contrib/gmp/mpn/pa64w/rshift.s, Revision 1.1.1.1

1.1       maekawa     1: ; HP-PA 2.0 __gmpn_rshift --
                      2:
                      3: ; Copyright (C) 1997, 2000 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 Lesser General Public License as published by
                      9: ; the Free Software Foundation; either version 2.1 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 Lesser General Public
                     15: ; License for more details.
                     16:
                     17: ; You should have received a copy of the GNU Lesser 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      gr26
                     25: ; s1_ptr       gr25
                     26: ; size         gr24
                     27: ; cnt          gr23
                     28:
                     29: ; This runs at 1.5 cycles/limb on PA8000.
                     30:
                     31:        .level  2.0w
                     32:        .code
                     33:        .export __gmpn_rshift,entry
                     34: __gmpn_rshift
                     35:        .proc
                     36:        .callinfo frame=0,args_saved
                     37:        .entry
                     38:
                     39:        mtsar           %r23
                     40:        ldd             0(%r25),%r21
                     41:        addib,=         -1,%r24,L$end
                     42:        shrpd           %r21,%r0,%sar,%r29      ; compute carry out limb
                     43:        depw,z          %r24,31,3,%r28          ; r28 = (size & 7)
                     44:        sub             %r0,%r24,%r22
                     45:        depw,z          %r22,28,3,%r22          ; r22 = 8 * (-size & 7)
                     46:        sub             %r25,%r22,%r25          ; offset s1_ptr
                     47:        blr             %r28,%r0                ; branch into jump table
                     48:        sub             %r26,%r22,%r26          ; offset res_ptr
                     49:        b               L$0
                     50:        nop
                     51:        b               L$1
                     52:        copy            %r21,%r20
                     53:        b               L$2
                     54:        nop
                     55:        b               L$3
                     56:        copy            %r21,%r20
                     57:        b               L$4
                     58:        nop
                     59:        b               L$5
                     60:        copy            %r21,%r20
                     61:        b               L$6
                     62:        nop
                     63:        b               L$7
                     64:        copy            %r21,%r20
                     65:
                     66: L$loop
                     67: L$0    ldd             8(%r25),%r20
                     68:        shrpd           %r20,%r21,%sar,%r21
                     69:        std             %r21,0(%r26)
                     70: L$7    ldd             16(%r25),%r21
                     71:        shrpd           %r21,%r20,%sar,%r20
                     72:        std             %r20,8(%r26)
                     73: L$6    ldd             24(%r25),%r20
                     74:        shrpd           %r20,%r21,%sar,%r21
                     75:        std             %r21,16(%r26)
                     76: L$5    ldd             32(%r25),%r21
                     77:        shrpd           %r21,%r20,%sar,%r20
                     78:        std             %r20,24(%r26)
                     79: L$4    ldd             40(%r25),%r20
                     80:        shrpd           %r20,%r21,%sar,%r21
                     81:        std             %r21,32(%r26)
                     82: L$3    ldd             48(%r25),%r21
                     83:        shrpd           %r21,%r20,%sar,%r20
                     84:        std             %r20,40(%r26)
                     85: L$2    ldd             56(%r25),%r20
                     86:        shrpd           %r20,%r21,%sar,%r21
                     87:        std             %r21,48(%r26)
                     88: L$1    ldd             64(%r25),%r21
                     89:        ldo             64(%r25),%r25
                     90:        shrpd           %r21,%r20,%sar,%r20
                     91:        std             %r20,56(%r26)
                     92:        addib,>         -8,%r24,L$loop
                     93:        ldo             64(%r26),%r26
                     94:
                     95: L$end  shrpd           %r0,%r21,%sar,%r21
                     96:        std             %r21,0(%r26)
                     97:        bve             (%r2)
                     98:        .exit
                     99:        copy            %r29,%r28
                    100:        .procend