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added tcc finite math function to avoid portability problems

tcc-xref
bellard 2002-03-17 11:32:48 +00:00
parent 22ce5f248a
commit 7f4fcf1216
1 changed files with 10 additions and 1 deletions
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11
tcc.c
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@ -672,6 +672,15 @@ unsigned long long __ldtoull(long double a)
/********************************************************/
/* we use our own 'finite' function to avoid potential problems with
non standard math libs */
/* XXX: endianness dependant */
int ieee_finite(double d)
{
int *p = (int *)&d;
return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
}
/* copy a string and truncate it. */
char *pstrcpy(char *buf, int buf_size, const char *s)
{
@ -3107,7 +3116,7 @@ void gen_opif(int op)
/* NOTE: we only do constant propagation if finite number (not
NaN or infinity) (ANSI spec) */
if (!finite(f1) || !finite(f2))
if (!ieee_finite(f1) || !ieee_finite(f2))
goto general_case;
switch(op) {