INNER CODE UNIT · C
BD
AmigaPorts/ACE · src/fixmath/fix16.c:128
uint32_t BD = B*D;
int32_t product_hi = AC + (AD_CB >> 16);
// Handle carry from lower 32 bits to upper part of result.
uint32_t ad_cb_temp = AD_CB << 16;
uint32_t product_lo = BD + ad_cb_temp;
if (product_lo < BD)
product_hi++;
#ifndef FIXMATH_NO_OVERFLOW
// The upper 17 bits should all be the same (the sign).
if (product_hi >> 31 != product_hi >> 15)
return fix16_overflow;
#endif
#ifdef FIXMATH_NO_ROUNDING
return (product_hi << 16) | (product_lo >> 16);