1 /* PR target/83008 */
2 /* { dg-do compile } */
3 /* { dg-options "-Ofast -funroll-loops -march=skylake-avx512 -mfpmath=sse" } */
4 /* { dg-final { scan-assembler-not "vmovdq(a|u)(32|64)" } } */
5
6 int
pr83008(unsigned char * pix1,int i_pix1,unsigned char * pix2,int i_pix2)7 pr83008 (unsigned char *pix1, int i_pix1, unsigned char *pix2, int i_pix2)
8 {
9 unsigned int tmp[4][4];
10 unsigned int a0, a1, a2, a3;
11 int sum = 0;
12 for (int i = 0; i < 4; i++, pix1 += i_pix1, pix2 += i_pix2)
13 {
14 a0 = (pix1[0] - pix2[0]) + ((pix1[4] - pix2[4]) << 16);
15 a1 = (pix1[1] - pix2[1]) + ((pix1[5] - pix2[5]) << 16);
16 a2 = (pix1[2] - pix2[2]) + ((pix1[6] - pix2[6]) << 16);
17 a3 = (pix1[3] - pix2[3]) + ((pix1[7] - pix2[7]) << 16);
18 int t0 = a0 + a1;
19 int t1 = a0 - a1;
20 int t2 = a2 + a3;
21 int t3 = a2 - a3;
22 tmp[i][0] = t0 + t2;
23 tmp[i][2] = t0 - t2;
24 tmp[i][1] = t1 + t3;
25 tmp[i][3] = t1 - t3;
26 }
27 for (int i = 0; i < 4; i++)
28 {
29 int t0 = tmp[0][i] + tmp[1][i];
30 int t1 = tmp[0][i] - tmp[1][i];
31 int t2 = tmp[2][i] + tmp[3][i];
32 int t3 = tmp[2][i] - tmp[3][i];
33 a0 = t0 + t2;
34 a2 = t0 - t2;
35 a1 = t1 + t3;
36 a3 = t1 - t3;
37 sum += (a0) + (a1) + (a2) + (a3);
38 }
39 return (sum + ((unsigned int) sum >> 16)) >> 1;
40 }
41