1 /* origin: FreeBSD /usr/src/lib/msun/src/s_lround.c */
3 * Copyright (c) 2005 David Schultz <das@FreeBSD.ORG>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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36 #define DTYPE_MIN LONG_MIN
37 #define DTYPE_MAX LONG_MAX
42 * If type has more precision than dtype, the endpoints dtype_(min|max) are
43 * of the form xxx.5; they are "out of range" because lround() rounds away
44 * from 0. On the other hand, if type has less precision than dtype, then
45 * all values that are out of range are integral, so we might as well assume
46 * that everything is in range. At compile time, INRANGE(x) should reduce to
47 * two floating-point comparisons in the former case, or TRUE otherwise.
49 static const type dtype_min = DTYPE_MIN - 0.5;
50 static const type dtype_max = DTYPE_MAX + 0.5;
52 (dtype_max - DTYPE_MAX != 0.5 || ((x) > dtype_min && (x) < dtype_max))
61 feraiseexcept(FE_INVALID);