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51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <math.h>
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#ifndef SUFF
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#define SUFF
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#endif
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#ifndef float_type
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#define float_type double
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#endif
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#define CONCATX(a,b) __CONCAT(a,b)
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#define s(name) CONCATX(name,SUFF)
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#define m81(func) __m81_u(s(func))
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int
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s(__ilogb) (float_type x)
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{
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float_type result;
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unsigned long x_cond;
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x_cond = __m81_test (x);
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/* We must return consistent values for zero and NaN. */
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if (x_cond & __M81_COND_ZERO)
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return FP_ILOGB0;
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if (x_cond & (__M81_COND_NAN | __M81_COND_INF))
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return FP_ILOGBNAN;
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__asm ("fgetexp%.x %1, %0" : "=f" (result) : "f" (x));
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return (int) result;
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}
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#define weak_aliasx(a,b) weak_alias(a,b)
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weak_aliasx (s(__ilogb), s(ilogb))
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