Fix test failure on Cygwin.

[gnulib.git] / m4 / isnanf.m4

diff --git a/m4/isnanf.m4 b/m4/isnanf.m4
index de7ebe8..289a49b 100644 (file)
--- a/m4/isnanf.m4
+++ b/m4/isnanf.m4
@@ -1,4 +1,4 @@
-# isnanf.m4 serial 7
+# isnanf.m4 serial 8
 dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -178,90 +178,3 @@ int main()
         ])
     ])
 ])
-
-AC_DEFUN([gl_FLOAT_EXPONENT_LOCATION],
-[
-  AC_CACHE_CHECK([where to find the exponent in a 'float'],
-    [gl_cv_cc_float_expbit0],
-    [
-      AC_TRY_RUN([
-#include <float.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
-#define NWORDS \
-  ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
-typedef union { float value; unsigned int word[NWORDS]; } memory_float;
-static unsigned int ored_words[NWORDS];
-static unsigned int anded_words[NWORDS];
-static void add_to_ored_words (float x)
-{
-  memory_float m;
-  size_t i;
-  /* Clear it first, in case
-     sizeof (float) < sizeof (memory_float).  */
-  memset (&m, 0, sizeof (memory_float));
-  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 (0.25f);
-  add_to_ored_words (0.5f);
-  add_to_ored_words (1.0f);
-  add_to_ored_words (2.0f);
-  add_to_ored_words (4.0f);
-  /* 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_float_expbit0=`cat conftest.out`],
-        [gl_cv_cc_float_expbit0="unknown"],
-        [gl_cv_cc_float_expbit0="word 0 bit 23"])
-      rm -f conftest.out
-    ])
-  case "$gl_cv_cc_float_expbit0" in
-    word*bit*)
-      word=`echo "$gl_cv_cc_float_expbit0" | sed -e 's/word //' -e 's/ bit.*//'`
-      bit=`echo "$gl_cv_cc_float_expbit0" | sed -e 's/word.*bit //'`
-      AC_DEFINE_UNQUOTED([FLT_EXPBIT0_WORD], [$word],
-        [Define as the word index where to find the exponent of 'float'.])
-      AC_DEFINE_UNQUOTED([FLT_EXPBIT0_BIT], [$bit],
-        [Define as the bit index in the word where to find bit 0 of the exponent of 'float'.])
-      ;;
-  esac
-])