INNER CODE UNIT · C
diff
AmigaPorts/ACE · src/fixmath/fix16.c:26
uint32_t diff = _a - _b;
// Overflow can only happen if sign of a != sign of b, and then
// it causes sign of diff != sign of a.
if (((_a ^ _b) & 0x80000000) && ((_a ^ diff) & 0x80000000))
return fix16_overflow;
return diff;
}
/* Saturating arithmetic */
fix16_t fix16_sadd(fix16_t a, fix16_t b)
{
fix16_t result = fix16_add(a, b);
if (result == fix16_overflow)
return (a >= 0) ? fix16_maximum : fix16_minimum;