Mercurial > hg > octave-nkf > gnulib-hg
changeset 15904:add96b15feb5
isnanl[-nolibm]: Fix for platforms where 'long double' == 'double'.
* lib/isnan.c (rpl_isnanl): Don't blindly assume 80-bit 'long double'.
* m4/isnanl.m4 (gl_PREREQ_ISNANL): Require gl_LONG_DOUBLE_VS_DOUBLE.
(gl_FUNC_ISNANL_WORKS): Likewise. Don't blindly assume 80-bit
'long double'.
* modules/isnanl-nolibm (Files): Add m4/math_h.m4.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Sun, 09 Oct 2011 12:14:12 +0200 |
| parents | 969352ed87a5 |
| children | 53e09ee0d19a |
| files | ChangeLog lib/isnan.c m4/isnanl.m4 modules/isnanl-nolibm |
| diffstat | 4 files changed, 14 insertions(+), 4 deletions(-) [+] |
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--- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,12 @@ 2011-10-09 Bruno Haible <bruno@clisp.org> + isnanl[-nolibm]: Fix for platforms where 'long double' == 'double'. + * lib/isnan.c (rpl_isnanl): Don't blindly assume 80-bit 'long double'. + * m4/isnanl.m4 (gl_PREREQ_ISNANL): Require gl_LONG_DOUBLE_VS_DOUBLE. + (gl_FUNC_ISNANL_WORKS): Likewise. Don't blindly assume 80-bit + 'long double'. + * modules/isnanl-nolibm (Files): Add m4/math_h.m4. + isinf: Fix for platforms where 'long double' == 'double'. * m4/isinf.m4 (gl_ISINFL_WORKS): Require gl_LONG_DOUBLE_VS_DOUBLE. Don't blindly assume 80-bit 'long double'.
--- a/lib/isnan.c +++ b/lib/isnan.c @@ -83,7 +83,7 @@ FUNC (DOUBLE x) { #ifdef KNOWN_EXPBIT0_LOCATION -# if defined USE_LONG_DOUBLE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) +# if defined USE_LONG_DOUBLE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE /* Special CPU dependent code is needed to treat bit patterns outside the IEEE 754 specification (such as Pseudo-NaNs, Pseudo-Infinities, Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals) as NaNs. @@ -157,7 +157,7 @@ the signaling NaNs, handle only the quiet NaNs. */ if (x == x) { -# if defined USE_LONG_DOUBLE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) +# if defined USE_LONG_DOUBLE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE /* Detect any special bit patterns that pass ==; see comment above. */ memory_double m1; memory_double m2;
--- a/m4/isnanl.m4 +++ b/m4/isnanl.m4 @@ -1,4 +1,4 @@ -# isnanl.m4 serial 16 +# isnanl.m4 serial 17 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -56,6 +56,7 @@ AC_DEFUN([gl_PREREQ_ISNANL], [ gl_LONG_DOUBLE_EXPONENT_LOCATION + AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) ]) dnl Test whether isnanl() can be used without libm. @@ -116,6 +117,7 @@ [ AC_REQUIRE([AC_PROG_CC]) AC_REQUIRE([gl_BIGENDIAN]) + AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether isnanl works], [gl_cv_func_isnanl_works], [ @@ -169,7 +171,7 @@ result |= 1; } -#if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) +#if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE /* Representation of an 80-bit 'long double' as an initializer for a sequence of 'unsigned int' words. */ # ifdef WORDS_BIGENDIAN