INNER CODE UNIT · C

AC

AmigaPorts/ACE · src/fixmath/fix16.c:126

	int32_t AC = A*C;
	int32_t AD_CB = A*D + C*B;
	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
	

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