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Diffstat (limited to 'gl/m4/isnanl.m4')
| -rw-r--r-- | gl/m4/isnanl.m4 | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/gl/m4/isnanl.m4 b/gl/m4/isnanl.m4 deleted file mode 100644 index ed5bbf8ba2..0000000000 --- a/gl/m4/isnanl.m4 +++ /dev/null @@ -1,255 +0,0 @@ -# isnanl.m4 serial 17 -dnl Copyright (C) 2007-2013 Free Software Foundation, Inc. -dnl This file is free software; the Free Software Foundation -dnl gives unlimited permission to copy and/or distribute it, -dnl with or without modifications, as long as this notice is preserved. - -AC_DEFUN([gl_FUNC_ISNANL], -[ - AC_REQUIRE([gl_MATH_H_DEFAULTS]) - ISNANL_LIBM= - gl_HAVE_ISNANL_NO_LIBM - if test $gl_cv_func_isnanl_no_libm = no; then - gl_HAVE_ISNANL_IN_LIBM - if test $gl_cv_func_isnanl_in_libm = yes; then - ISNANL_LIBM=-lm - fi - fi - dnl The variable gl_func_isnanl set here is used by isnan.m4. - if test $gl_cv_func_isnanl_no_libm = yes \ - || test $gl_cv_func_isnanl_in_libm = yes; then - save_LIBS="$LIBS" - LIBS="$LIBS $ISNANL_LIBM" - gl_FUNC_ISNANL_WORKS - LIBS="$save_LIBS" - case "$gl_cv_func_isnanl_works" in - *yes) gl_func_isnanl=yes ;; - *) gl_func_isnanl=no; ISNANL_LIBM= ;; - esac - else - gl_func_isnanl=no - fi - if test $gl_func_isnanl != yes; then - HAVE_ISNANL=0 - fi - AC_SUBST([ISNANL_LIBM]) -]) - -AC_DEFUN([gl_FUNC_ISNANL_NO_LIBM], -[ - gl_HAVE_ISNANL_NO_LIBM - gl_func_isnanl_no_libm=$gl_cv_func_isnanl_no_libm - if test $gl_func_isnanl_no_libm = yes; then - gl_FUNC_ISNANL_WORKS - case "$gl_cv_func_isnanl_works" in - *yes) ;; - *) gl_func_isnanl_no_libm=no ;; - esac - fi - if test $gl_func_isnanl_no_libm = yes; then - AC_DEFINE([HAVE_ISNANL_IN_LIBC], [1], - [Define if the isnan(long double) function is available in libc.]) - fi -]) - -dnl Prerequisites of replacement isnanl definition. It does not need -lm. -AC_DEFUN([gl_PREREQ_ISNANL], -[ - gl_LONG_DOUBLE_EXPONENT_LOCATION - AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) -]) - -dnl Test whether isnanl() can be used without libm. -AC_DEFUN([gl_HAVE_ISNANL_NO_LIBM], -[ - AC_CACHE_CHECK([whether isnan(long double) can be used without linking with libm], - [gl_cv_func_isnanl_no_libm], - [ - AC_LINK_IFELSE( - [AC_LANG_PROGRAM( - [[#include <math.h> - #if __GNUC__ >= 4 - # undef isnanl - # define isnanl(x) __builtin_isnanl ((long double)(x)) - #elif defined isnan - # undef isnanl - # define isnanl(x) isnan ((long double)(x)) - #endif - long double x;]], - [[return isnanl (x);]])], - [gl_cv_func_isnanl_no_libm=yes], - [gl_cv_func_isnanl_no_libm=no]) - ]) -]) - -dnl Test whether isnanl() can be used with libm. -AC_DEFUN([gl_HAVE_ISNANL_IN_LIBM], -[ - AC_CACHE_CHECK([whether isnan(long double) can be used with libm], - [gl_cv_func_isnanl_in_libm], - [ - save_LIBS="$LIBS" - LIBS="$LIBS -lm" - AC_LINK_IFELSE( - [AC_LANG_PROGRAM( - [[#include <math.h> - #if __GNUC__ >= 4 - # undef isnanl - # define isnanl(x) __builtin_isnanl ((long double)(x)) - #elif defined isnan - # undef isnanl - # define isnanl(x) isnan ((long double)(x)) - #endif - long double x;]], - [[return isnanl (x);]])], - [gl_cv_func_isnanl_in_libm=yes], - [gl_cv_func_isnanl_in_libm=no]) - LIBS="$save_LIBS" - ]) -]) - -dnl Test whether isnanl() recognizes all numbers which are neither finite nor -dnl infinite. This test fails e.g. on NetBSD/i386 and on glibc/ia64. -dnl Also, the GCC >= 4.0 built-in __builtin_isnanl does not pass the tests -dnl - for pseudo-denormals on i686 and x86_64, -dnl - for pseudo-zeroes, unnormalized numbers, and pseudo-denormals on ia64. -AC_DEFUN([gl_FUNC_ISNANL_WORKS], -[ - 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], - [ - AC_RUN_IFELSE( - [AC_LANG_SOURCE([[ -#include <float.h> -#include <limits.h> -#include <math.h> -#if __GNUC__ >= 4 -# undef isnanl -# define isnanl(x) __builtin_isnanl ((long double)(x)) -#elif defined isnan -# undef isnanl -# define isnanl(x) isnan ((long double)(x)) -#endif -#define NWORDS \ - ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int)) -typedef union { unsigned int word[NWORDS]; long double value; } - memory_long_double; -/* On Irix 6.5, gcc 3.4.3 can't compute compile-time NaN, and needs the - runtime type conversion. */ -#ifdef __sgi -static long double NaNl () -{ - double zero = 0.0; - return zero / zero; -} -#else -# define NaNl() (0.0L / 0.0L) -#endif -int main () -{ - int result = 0; - - if (!isnanl (NaNl ())) - result |= 1; - - { - memory_long_double m; - unsigned int i; - - /* The isnanl function should be immune against changes in the sign bit and - in the mantissa bits. The xor operation twiddles a bit that can only be - a sign bit or a mantissa bit (since the exponent never extends to - bit 31). */ - m.value = NaNl (); - m.word[NWORDS / 2] ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1); - for (i = 0; i < NWORDS; i++) - m.word[i] |= 1; - if (!isnanl (m.value)) - 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_)) && !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 -# define LDBL80_WORDS(exponent,manthi,mantlo) \ - { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \ - ((unsigned int) (manthi) << 16) | (unsigned int) (mantlo) >> 16), \ - (unsigned int) (mantlo) << 16 \ - } -# else -# define LDBL80_WORDS(exponent,manthi,mantlo) \ - { mantlo, manthi, exponent } -# endif - { /* Quiet NaN. */ - static memory_long_double x = - { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) }; - if (!isnanl (x.value)) - result |= 2; - } - { - /* Signalling NaN. */ - static memory_long_double x = - { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) }; - if (!isnanl (x.value)) - result |= 2; - } - /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities, - Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in - Intel IA-64 Architecture Software Developer's Manual, Volume 1: - Application Architecture. - Table 5-2 "Floating-Point Register Encodings" - Figure 5-6 "Memory to Floating-Point Register Data Translation" - */ - { /* Pseudo-NaN. */ - static memory_long_double x = - { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) }; - if (!isnanl (x.value)) - result |= 4; - } - { /* Pseudo-Infinity. */ - static memory_long_double x = - { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) }; - if (!isnanl (x.value)) - result |= 8; - } - { /* Pseudo-Zero. */ - static memory_long_double x = - { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) }; - if (!isnanl (x.value)) - result |= 16; - } - { /* Unnormalized number. */ - static memory_long_double x = - { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) }; - if (!isnanl (x.value)) - result |= 32; - } - { /* Pseudo-Denormal. */ - static memory_long_double x = - { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) }; - if (!isnanl (x.value)) - result |= 64; - } -#endif - - return result; -}]])], - [gl_cv_func_isnanl_works=yes], - [gl_cv_func_isnanl_works=no], - [case "$host_cpu" in - # Guess no on ia64, x86_64, i386. - ia64 | x86_64 | i*86) gl_cv_func_isnanl_works="guessing no";; - *) - case "$host_os" in - netbsd*) gl_cv_func_isnanl_works="guessing no";; - *) gl_cv_func_isnanl_works="guessing yes";; - esac - ;; - esac - ]) - ]) -]) |