Rename isnan, applicable to 'double' only, to isnand.

1 files changed, 0 insertions, 137 deletions

diff --git a/m4/isnan.m4 b/m4/isnan.m4
deleted file mode 100644
index de692e69a8..0000000000
--- a/m4/isnan.m4
+++ /dev/null
@@ -1,137 +0,0 @@
-# isnan.m4 serial 2
-dnl Copyright (C) 2007 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.
-
-dnl Check how to get or define isnan() without linking with libm.
-
-AC_DEFUN([gl_FUNC_ISNAN_NO_LIBM],
-[
-  AC_CACHE_CHECK([whether isnan(double) can be used without linking with libm],
-    [gl_cv_func_isnan_no_libm],
-    [
-      AC_TRY_LINK([#include <math.h>
-                   double x;],
-                  [return isnan (x);],
-        [gl_cv_func_isnan_no_libm=yes],
-        [gl_cv_func_isnan_no_libm=no])
-    ])
-  if test $gl_cv_func_isnan_no_libm = yes; then
-    AC_DEFINE([HAVE_ISNAN_IN_LIBC], 1,
-      [Define if the isnan(double) function is available in libc.])
-  else
-    AC_LIBOBJ([isnan])
-    gl_DOUBLE_EXPONENT_LOCATION
-  fi
-])
-
-AC_DEFUN([gl_DOUBLE_EXPONENT_LOCATION],
-[
-  AC_CACHE_CHECK([where to find the exponent in a 'double'],
-    [gl_cv_cc_double_expbit0],
-    [
-      AC_TRY_RUN([
-#include <float.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
-#define NWORDS \
-  ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
-typedef union { double value; unsigned int word[NWORDS]; } memory_double;
-static unsigned int ored_words[NWORDS];
-static unsigned int anded_words[NWORDS];
-static void add_to_ored_words (double x)
-{
-  memory_double m;
-  size_t i;
-  /* Clear it first, in case sizeof (double) < sizeof (memory_double).  */
-  memset (&m, 0, sizeof (memory_double));
-  m.value = x;
-  for (i = 0; i < NWORDS; i++)
-    {
-      ored_words[i] |= m.word[i];
-      anded_words[i] &= m.word[i];
-    }
-}
-int main ()
-{
-  size_t j;
-  FILE *fp = fopen ("conftest.out", "w");
-  if (fp == NULL)
-    return 1;
-  for (j = 0; j < NWORDS; j++)
-    anded_words[j] = ~ (unsigned int) 0;
-  add_to_ored_words (0.25);
-  add_to_ored_words (0.5);
-  add_to_ored_words (1.0);
-  add_to_ored_words (2.0);
-  add_to_ored_words (4.0);
-  /* Remove bits that are common (e.g. if representation of the first mantissa
-     bit is explicit).  */
-  for (j = 0; j < NWORDS; j++)
-    ored_words[j] &= ~anded_words[j];
-  /* Now find the nonzero word.  */
-  for (j = 0; j < NWORDS; j++)
-    if (ored_words[j] != 0)
-      break;
-  if (j < NWORDS)
-    {
-      size_t i;
-      for (i = j + 1; i < NWORDS; i++)
-        if (ored_words[i] != 0)
-          {
-            fprintf (fp, "unknown");
-            return (fclose (fp) != 0);
-          }
-      for (i = 0; ; i++)
-        if ((ored_words[j] >> i) & 1)
-          {
-            fprintf (fp, "word %d bit %d", (int) j, (int) i);
-            return (fclose (fp) != 0);
-          }
-    }
-  fprintf (fp, "unknown");
-  return (fclose (fp) != 0);
-}
-        ],
-        [gl_cv_cc_double_expbit0=`cat conftest.out`],
-        [gl_cv_cc_double_expbit0="unknown"],
-        [
-          dnl On ARM, there are two 'double' floating-point formats, used by
-          dnl different sets of instructions: The older FPA instructions assume
-          dnl that they are stored in big-endian word order, while the words
-          dnl (like integer types) are stored in little-endian byte order.
-          dnl The newer VFP instructions assume little-endian order consistenly.
-          AC_EGREP_CPP([mixed_endianness], [
-#if defined arm || defined __arm || defined __arm__
-  mixed_endianness
-#endif
-            ],
-            [gl_cv_cc_double_expbit0="unknown"],
-            [
-              pushdef([AC_MSG_CHECKING],[:])dnl
-              pushdef([AC_MSG_RESULT],[:])dnl
-              pushdef([AC_MSG_RESULT_UNQUOTED],[:])dnl
-              AC_C_BIGENDIAN(
-                [gl_cv_cc_double_expbit0="word 0 bit 20"],
-                [gl_cv_cc_double_expbit0="word 1 bit 20"],
-                [gl_cv_cc_double_expbit0="unknown"])
-              popdef([AC_MSG_RESULT_UNQUOTED])dnl
-              popdef([AC_MSG_RESULT])dnl
-              popdef([AC_MSG_CHECKING])dnl
-            ])
-        ])
-      rm -f conftest.out
-    ])
-  case "$gl_cv_cc_double_expbit0" in
-    word*bit*)
-      word=`echo "$gl_cv_cc_double_expbit0" | sed -e 's/word //' -e 's/ bit.*//'`
-      bit=`echo "$gl_cv_cc_double_expbit0" | sed -e 's/word.*bit //'`
-      AC_DEFINE_UNQUOTED([DBL_EXPBIT0_WORD], [$word],
-        [Define as the word index where to find the exponent of 'double'.])
-      AC_DEFINE_UNQUOTED([DBL_EXPBIT0_BIT], [$bit],
-        [Define as the bit index in the word where to find bit 0 of the exponent of 'double'.])
-      ;;
-  esac
-])