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9946e7a949
The wrapper implementations of ldexp / scalbn / scalbln (architecture-independent), and their float / long double variants, return sNaN for sNaN input. This patch fixes them to add relevant arguments to themselves so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20225] * math/s_ldexp.c (__ldexp): Add non-finite or zero argument to itself. * math/s_ldexpf.c (__ldexpf): Likewise. * math/s_ldexpl.c (__ldexpl): Likewise. * math/w_scalbln.c (__w_scalbln): Likewise. * math/w_scalblnf.c (__w_scalblnf): Likewise. * math/w_scalblnl.c (__w_scalblnl): Likewise. * math/libm-test.inc (scalbn_test_data): Add sNaN tests. (scalbln_test_data): Likewise.
35 lines
984 B
C
35 lines
984 B
C
/* @(#)s_ldexp.c 5.1 93/09/24 */
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#if defined(LIBM_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: s_ldexp.c,v 1.6 1995/05/10 20:47:40 jtc Exp $";
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#endif
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#include <math.h>
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#include <math_private.h>
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#include <errno.h>
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double __ldexp(double value, int exp)
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{
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if(!isfinite(value)||value==0.0) return value + value;
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value = __scalbn(value,exp);
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if(!isfinite(value)||value==0.0) __set_errno (ERANGE);
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return value;
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}
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weak_alias (__ldexp, ldexp)
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weak_alias (__ldexp, scalbn)
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#ifdef NO_LONG_DOUBLE
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strong_alias (__ldexp, __ldexpl)
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weak_alias (__ldexp, ldexpl)
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weak_alias (__ldexp, scalbnl)
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#endif
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