Viewing file:  pr99856.c (1.13 KB) -rw-r--r--
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/* { 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" } } */
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