-# isnanf.m4 serial 11
+# isnanf.m4 serial 12
dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
typedef union { unsigned int word[NWORDS]; float value; } memory_float;
int main()
{
- memory_float m;
+ int result = 0;
if (isnanf (1.0f / 0.0f))
- return 1;
+ result |= 1;
if (!isnanf (NaN ()))
- return 1;
+ result |= 2;
#if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT
/* The isnanf function should be immune against changes in the sign bit and
a sign bit or a mantissa bit. */
if (FLT_EXPBIT0_WORD == 0 && FLT_EXPBIT0_BIT > 0)
{
+ memory_float m;
+
m.value = NaN ();
/* Set the bits below the exponent to 01111...111. */
m.word[0] &= -1U << FLT_EXPBIT0_BIT;
m.word[0] |= 1U << (FLT_EXPBIT0_BIT - 1) - 1;
if (!isnanf (m.value))
- return 1;
+ result |= 4;
}
#endif
- return 0;
+ return result;
}]])],
[gl_cv_func_isnanf_works=yes],
[gl_cv_func_isnanf_works=no],