generic-library/webp
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

dec_neon,NeedsHev: micro optimization

Browse Source 
trade 2 compares + 1 logical or for max + compare

Change-Id: I785ad8efdc64db2d0609456d6e7af795ab2117d8
This commit is contained in:
James Zern 2016-08-08 20:12:30 -07:00
parent 7b54e26bac
commit 40872fb2e6
1 changed files with 2 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/dsp/dec_neon.c
View File

@ -666,9 +666,8 @@ static uint8x16_t NeedsHev(const uint8x16_t p1, const uint8x16_t p0,
const uint8x16_t hev_thresh_v = vdupq_n_u8((uint8_t)hev_thresh);
const uint8x16_t a_p1_p0 = vabdq_u8(p1, p0); // abs(p1 - p0)
const uint8x16_t a_q1_q0 = vabdq_u8(q1, q0); // abs(q1 - q0)
const uint8x16_t mask1 = vcgtq_u8(a_p1_p0, hev_thresh_v);
const uint8x16_t mask2 = vcgtq_u8(a_q1_q0, hev_thresh_v);
const uint8x16_t mask = vorrq_u8(mask1, mask2);
const uint8x16_t a_max = vmaxq_u8(a_p1_p0, a_q1_q0);
const uint8x16_t mask = vcgtq_u8(a_max, hev_thresh_v);
return mask;
}