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9cafe23fb8
We now generate the operator map algorithmically, which is a bit less classy than solving the logical equations, but easier to get right. Also renamed the somewhat vague "redundant" to "unreachable".
48 lines
963 B
C
48 lines
963 B
C
/*
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* relop.h - Relational operators
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*
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* Copyright 2012 by Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef RELOP_H
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#define RELOP_H
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#include <stdio.h>
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enum relop_idx {
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idx_lt = 0,
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idx_le = 1,
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idx_eq = 2,
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idx_ge = 3,
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idx_gt = 4,
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idx_n = 5
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};
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enum relop {
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rel_lt = 1 << idx_lt,
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rel_le = 1 << idx_le,
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rel_eq = 1 << idx_eq,
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rel_ge = 1 << idx_ge,
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rel_gt = 1 << idx_gt,
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};
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/*
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* relop_unreachable checks whether, for all X: !(X opb A) -> !(X opa B)
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*/
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int relop_unreachable(enum relop opa, enum relop opb,
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const void *a, const void *b,
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int (*cmp)(const void *a, enum relop op, const void *b, const void *user),
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const void *user);
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void dump_relop(FILE *file, enum relop op);
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#endif /* !RELOP_H */
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