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Annotation of OpenXM_contrib/gmp/mpn/sparc32/lshift.S, Revision 1.1.1.1

1.1       maekawa     1: ! sparc __mpn_lshift --
                      2:
                      3: ! Copyright (C) 1995, 1996 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      %o0
                     25: ! src_ptr      %o1
                     26: ! size         %o2
                     27: ! cnt          %o3
                     28:
                     29: #include "sysdep.h"
                     30:
                     31:        .text
                     32:        .align  4
                     33:        .global C_SYMBOL_NAME(__mpn_lshift)
                     34: C_SYMBOL_NAME(__mpn_lshift):
                     35:        sll     %o2,2,%g1
                     36:        add     %o1,%g1,%o1     ! make %o1 point at end of src
                     37:        ld      [%o1-4],%g2     ! load first limb
                     38:        sub     %g0,%o3,%o5     ! negate shift count
                     39:        add     %o0,%g1,%o0     ! make %o0 point at end of res
                     40:        add     %o2,-1,%o2
                     41:        andcc   %o2,4-1,%g4     ! number of limbs in first loop
                     42:        srl     %g2,%o5,%g1     ! compute function result
                     43:        be      L0              ! if multiple of 4 limbs, skip first loop
                     44:        st      %g1,[%sp+80]
                     45:
                     46:        sub     %o2,%g4,%o2     ! adjust count for main loop
                     47:
                     48: Loop0: ld      [%o1-8],%g3
                     49:        add     %o0,-4,%o0
                     50:        add     %o1,-4,%o1
                     51:        addcc   %g4,-1,%g4
                     52:        sll     %g2,%o3,%o4
                     53:        srl     %g3,%o5,%g1
                     54:        mov     %g3,%g2
                     55:        or      %o4,%g1,%o4
                     56:        bne     Loop0
                     57:         st     %o4,[%o0+0]
                     58:
                     59: L0:    tst     %o2
                     60:        be      Lend
                     61:         nop
                     62:
                     63: Loop:  ld      [%o1-8],%g3
                     64:        add     %o0,-16,%o0
                     65:        addcc   %o2,-4,%o2
                     66:        sll     %g2,%o3,%o4
                     67:        srl     %g3,%o5,%g1
                     68:
                     69:        ld      [%o1-12],%g2
                     70:        sll     %g3,%o3,%g4
                     71:        or      %o4,%g1,%o4
                     72:        st      %o4,[%o0+12]
                     73:        srl     %g2,%o5,%g1
                     74:
                     75:        ld      [%o1-16],%g3
                     76:        sll     %g2,%o3,%o4
                     77:        or      %g4,%g1,%g4
                     78:        st      %g4,[%o0+8]
                     79:        srl     %g3,%o5,%g1
                     80:
                     81:        ld      [%o1-20],%g2
                     82:        sll     %g3,%o3,%g4
                     83:        or      %o4,%g1,%o4
                     84:        st      %o4,[%o0+4]
                     85:        srl     %g2,%o5,%g1
                     86:
                     87:        add     %o1,-16,%o1
                     88:        or      %g4,%g1,%g4
                     89:        bne     Loop
                     90:         st     %g4,[%o0+0]
                     91:
                     92: Lend:  sll     %g2,%o3,%g2
                     93:        st      %g2,[%o0-4]
                     94:        retl
                     95:        ld      [%sp+80],%o0