--- /dev/null
+/* { dg-do compile } */
+/* { dg-require-effective-target vect_int } */
+/* { dg-require-effective-target vect_unpack } */
+/* { dg-require-effective-target vect_pack_trunc } */
+
+#define SHIFTFORDIV255(a)\
+ ((((a) >> 8) + a) >> 8)
+
+#define DIV255(a)\
+ SHIFTFORDIV255(a + 0x80)
+
+typedef unsigned char uint8_t;
+
+void
+opSourceOver_premul(uint8_t* restrict Rrgba,
+ const uint8_t* restrict Srgba,
+ const uint8_t* restrict Drgba, int len)
+{
+ Rrgba = __builtin_assume_aligned (Rrgba, __BIGGEST_ALIGNMENT__);
+ Srgba = __builtin_assume_aligned (Rrgba, __BIGGEST_ALIGNMENT__);
+ Drgba = __builtin_assume_aligned (Rrgba, __BIGGEST_ALIGNMENT__);
+ int i = 0;
+ for (; i < len*4; i += 4)
+ {
+ uint8_t Sa = Srgba[i + 3];
+ Rrgba[i + 0] = DIV255(Srgba[i + 0] * 255 + Drgba[i + 0] * (255 - Sa));
+ Rrgba[i + 1] = DIV255(Srgba[i + 1] * 255 + Drgba[i + 1] * (255 - Sa));
+ Rrgba[i + 2] = DIV255(Srgba[i + 2] * 255 + Drgba[i + 2] * (255 - Sa));
+ Rrgba[i + 3] = DIV255(Srgba[i + 3] * 255 + Drgba[i + 3] * (255 - Sa));
+ }
+}
+
+/* { dg-final { scan-tree-dump "vectorized 1 loops in function" "vect" } } */
/* Apply the minimum efficient precision we just calculated. */
if (new_precision < min_precision)
new_precision = min_precision;
+ new_precision = vect_element_precision (new_precision);
if (new_precision >= TYPE_PRECISION (type))
return NULL;