#define SHIFT_TEMPS
#define DCTSIZE 8
+#define BITS_IN_JSAMPLE 8
#define GLOBAL(x) x
#define RIGHT_SHIFT(x, n) ((x) >> (n))
+#define MULTIPLY16C16(var,const) ((var)*(const))
#if 1 //def USE_ACCURATE_ROUNDING
#define DESCALE(x,n) RIGHT_SHIFT((x) + (1 << ((n) - 1)), n)
#if BITS_IN_JSAMPLE == 8
#define CONST_BITS 13
-#define PASS1_BITS 2
+#define PASS1_BITS 4 /* set this to 2 if 16x16 multiplies are faster */
#else
#define CONST_BITS 13
#define PASS1_BITS 1 /* lose a little precision to avoid overflow */
* For 12-bit samples, a full 32-bit multiplication will be needed.
*/
-#if BITS_IN_JSAMPLE == 8
+#if BITS_IN_JSAMPLE == 8 && CONST_BITS<=13 && PASS1_BITS<=2
#define MULTIPLY(var,const) MULTIPLY16C16(var,const)
#else
#define MULTIPLY(var,const) ((var) * (const))