math/math.h (HUGE_VAL): Improve commentary.
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2017-09-01 Zack Weinberg <zackw@panix.com>
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* math/math.h (HUGE_VAL): Improve commentary.
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2017-09-01 Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Andreas Schwab <schwab@suse.de>
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@ -37,11 +37,16 @@ __BEGIN_DECLS
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/* Gather machine dependent type support. */
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#include <bits/floatn.h>
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/* Value returned on overflow. On all IEEE754 machines, this is
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+Infinity. */
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/* Value returned on overflow. With IEEE 754 floating point, this is
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+Infinity, otherwise the largest representable positive value. */
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#if __GNUC_PREREQ (3, 3)
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# define HUGE_VAL (__builtin_huge_val ())
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#else
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/* This may provoke compiler warnings, and may not be rounded to
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+Infinity in all IEEE 754 rounding modes, but is the best that can
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be done in ISO C while remaining a constant expression. 10,000 is
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greater than the maximum (decimal) exponent for all supported
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floating-point formats and widths. */
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# define HUGE_VAL 1e10000
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#endif
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#ifdef __USE_ISOC99
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