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Annotation of gcc/config/sh/ashrsi3.c, revision 1.1.1.1

1.1       root        1: /* Copyright (C) 1994 Free Software Foundation, Inc.
                      2: 
                      3: This file is free software; you can redistribute it and/or modify it
                      4: under the terms of the GNU General Public License as published by the
                      5: Free Software Foundation; either version 2, or (at your option) any
                      6: later version.
                      7: 
                      8: In addition to the permissions in the GNU General Public License, the
                      9: Free Software Foundation gives you unlimited permission to link the
                     10: compiled version of this file with other programs, and to distribute
                     11: those programs without any restriction coming from the use of this
                     12: file.  (The General Public License restrictions do apply in other
                     13: respects; for example, they cover modification of the file, and
                     14: distribution when not linked into another program.)
                     15: 
                     16: This file is distributed in the hope that it will be useful, but
                     17: WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
                     19: General Public License for more details.
                     20: 
                     21: You should have received a copy of the GNU General Public License
                     22: along with this program; see the file COPYING.  If not, write to
                     23: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
                     24: 
                     25: /* As a special exception, if you link this library with other files,
                     26:    some of which are compiled with GCC, to produce an executable,
                     27:    this library does not by itself cause the resulting executable
                     28:    to be covered by the GNU General Public License.
                     29:    This exception does not however invalidate any other reasons why
                     30:    the executable file might be covered by the GNU General Public License.  */
                     31: 
                     32: 
                     33: /* libgcc1 routines for the Hitachi SH cpu.
                     34:    Contributed by Steve Chamberlain.
                     35:    [email protected] */
                     36: 
                     37: 
                     38: 
                     39: long
                     40: __ashrsi3 (int a, int b)
                     41: {
                     42:   switch ((b - 1))
                     43:     {
                     44:     case 24 + 7:
                     45:       a >>= 1;
                     46:     case 24 + 6:
                     47:       a >>= 1;
                     48:     case 24 + 5:
                     49:       a >>= 1;
                     50:     case 24 + 4:
                     51:       a >>= 1;
                     52:     case 24 + 3:
                     53:       a >>= 1;
                     54:     case 24 + 2:
                     55:       a >>= 1;
                     56:     case 24 + 1:
                     57:       a >>= 1;
                     58:     case 24 + 0:
                     59:       a >>= 1;
                     60:     case 16 + 7:
                     61:       a >>= 1;
                     62:     case 16 + 6:
                     63:       a >>= 1;
                     64:     case 16 + 5:
                     65:       a >>= 1;
                     66:     case 16 + 4:
                     67:       a >>= 1;
                     68:     case 16 + 3:
                     69:       a >>= 1;
                     70:     case 16 + 2:
                     71:       a >>= 1;
                     72:     case 16 + 1:
                     73:       a >>= 1;
                     74:     case 16 + 0:
                     75:       a >>= 1;
                     76:     case 8 + 7:
                     77:       a >>= 1;
                     78:     case 8 + 6:
                     79:       a >>= 1;
                     80:     case 8 + 5:
                     81:       a >>= 1;
                     82:     case 8 + 4:
                     83:       a >>= 1;
                     84:     case 8 + 3:
                     85:       a >>= 1;
                     86:     case 8 + 2:
                     87:       a >>= 1;
                     88:     case 8 + 1:
                     89:       a >>= 1;
                     90:     case 8 + 0:
                     91:       a >>= 1;
                     92:     case 0 + 7:
                     93:       a >>= 1;
                     94:     case 0 + 6:
                     95:       a >>= 1;
                     96:     case 0 + 5:
                     97:       a >>= 1;
                     98:     case 0 + 4:
                     99:       a >>= 1;
                    100:     case 0 + 3:
                    101:       a >>= 1;
                    102:     case 0 + 2:
                    103:       a >>= 1;
                    104:     case 0 + 1:
                    105:       a >>= 1;
                    106:     case 0 + 0:
                    107:       a >>= 1;;
                    108:     };
                    109:   return a;
                    110: }

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