{
uint32_t flags;
+ /* FIXME: Add exception raising. */
if (isnan (fvalue1) || isnan (fvalue2))
flags = C|V;
+ else if (isinf (fvalue1) && isinf (fvalue2))
+ {
+ /* Subtracting two infinities may give a NaN. We only need to compare
+ the signs, which we can get from isinf. */
+ int result = isinf (fvalue1) - isinf (fvalue2);
+
+ if (result == 0)
+ flags = Z|C;
+ else if (result < 0)
+ flags = N;
+ else /* (result > 0). */
+ flags = C;
+ }
else
{
float result = fvalue1 - fvalue2;
{
uint32_t flags;
+ /* FIXME: Add exception raising. */
if (isnan (dval1) || isnan (dval2))
flags = C|V;
+ else if (isinf (dval1) && isinf (dval2))
+ {
+ /* Subtracting two infinities may give a NaN. We only need to compare
+ the signs, which we can get from isinf. */
+ int result = isinf (dval1) - isinf (dval2);
+
+ if (result == 0)
+ flags = Z|C;
+ else if (result < 0)
+ flags = N;
+ else /* (result > 0). */
+ flags = C;
+ }
else
{
double result = dval1 - dval2;