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/* Bug: isinf() produces too large code with GCC 4.3.0
$Id: 20080322-isinf.c,v 1.1.2.2 2008/03/22 04:13:14 dmix Exp $
GCC 4.3.0 unrolls the isinf() function with call of __unordsf2().
The testing method is to force 'region text is full' in case
of libgcc's __unordsf2() function usage. */
#ifdef __AVR__
#include <avr/io.h>
/* Sufficient MIN_SIZE value:
200 avr-gcc 4.1.2, ATmega128
700 avr-gcc 4.3.0, ATmega128, before fixing
280 avr-gcc 4.3.0, ATmega128, after fixing of this bug
*/
#define MIN_SIZE 320
#define NWORDS ((FLASHEND - _VECTORS_SIZE - MIN_SIZE)/2)
void very_big_function (void)
{
asm volatile (
".rept (%0)*256 + %1 \n\t"
"nop \n\t"
".endr "
:: "M" (NWORDS / 256),
"M" (NWORDS % 256)
);
}
#endif
int isinf (double);
int main ()
{
static volatile double x;
return isinf (x);
}
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