git://gcc.gnu.org / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| b79f73df JL |
1 | /* Implement POWERSET runtime actions for CHILL. |
| 2 | Copyright (C) 1992,1993 Free Software Foundation, Inc. | |
| 3 | Author: Wilfried Moser, et al | |
| 4 | ||
| 5 | This file is part of GNU CC. | |
| 6 | ||
| 7 | GNU CC is free software; you can redistribute it and/or modify | |
| 8 | it under the terms of the GNU General Public License as published by | |
| 9 | the Free Software Foundation; either version 2, or (at your option) | |
| 10 | any later version. | |
| 11 | ||
| 12 | GNU CC is distributed in the hope that it will be useful, | |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | GNU General Public License for more details. | |
| 16 | ||
| 17 | You should have received a copy of the GNU General Public License | |
| 18 | along with GNU CC; see the file COPYING. If not, write to | |
| 19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
| 20 | ||
| 21 | #define __CHILL_LIB__ | |
| 22 | ||
| 23 | #include "config.h" | |
| 24 | #include <stdio.h> | |
| 25 | #include "powerset.h" | |
| 26 | ||
| 27 | /* | |
| 28 | * function __ltpowerset | |
| 29 | * | |
| 30 | * parameters: | |
| 31 | * left powerset | |
| 32 | * right powerset | |
| 33 | * bitlength length of powerset | |
| 34 | * | |
| 35 | * returns: | |
| 36 | * int 1 .. left is proper subset of right | |
| 37 | * (excludes case where left == right) | |
| 38 | * 0 .. not | |
| 39 | * | |
| 40 | * abstract: | |
| 41 | * check if one powerset is included in another | |
| 42 | * | |
| 43 | */ | |
| 44 | int | |
| 45 | __ltpowerset (left, right, bitlength) | |
| 46 | SET_WORD *left; | |
| 47 | SET_WORD *right; | |
| 48 | unsigned long bitlength; | |
| 49 | { | |
| 50 | if (bitlength <= SET_CHAR_SIZE) | |
| 51 | { | |
| 52 | if ((*((SET_CHAR *)left) & *((SET_CHAR *)right)) | |
| 53 | != *((SET_CHAR *)left)) | |
| 54 | return 0; | |
| 55 | if (*((SET_CHAR *)left) != *((SET_CHAR *)right)) | |
| 56 | return 1; | |
| 57 | return 0; | |
| 58 | } | |
| 59 | else if (bitlength <= SET_SHORT_SIZE) | |
| 60 | { | |
| 61 | if ((*((SET_SHORT *)left) & *((SET_SHORT *)right)) | |
| 62 | != *((SET_SHORT *)left)) | |
| 63 | return 0; | |
| 64 | if (*((SET_SHORT *)left) != *((SET_SHORT *)right)) | |
| 65 | return 1; | |
| 66 | return 0; | |
| 67 | } | |
| 68 | else | |
| 69 | { | |
| 70 | SET_WORD *endp = left + BITS_TO_WORDS(bitlength); | |
| 71 | int all_equal = 1; /* assume all bits are equal */ | |
| 72 | ||
| 73 | while (left < endp) | |
| 74 | { | |
| 75 | if ((*right & *left) != *left) | |
| 76 | return 0; | |
| 77 | if (*left != *right) | |
| 78 | all_equal = 0; | |
| 79 | left++; | |
| 80 | right++; | |
| 81 | } | |
| 82 | if (left == endp && all_equal) /* exclude TRUE return for == case */ | |
| 83 | return 0; | |
| 84 | return 1; | |
| 85 | } | |
| 86 | } |