dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-16 13:59:51 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

argb_sse2: cosmetics

Browse Source 
clarify some variable names in PackARGB() + add some comments

Change-Id: I2bb91d6c52dcbcdebe0f92d5f2136c2d7d11af2a
This commit is contained in:
pascal massimino
2015-01-08 00:17:24 -08:00
committed by James Zern
parent 67f601cd46
commit c6d3292738
2 changed files with 6 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/dsp/argb_sse2.c
View File

@ -27,14 +27,14 @@ static void PackARGB(const uint8_t* a, const uint8_t* r, const uint8_t* g,
const uint8_t* b, int len, uint32_t* out) {
if (g == r + 1) { // RGBA input order. Need to swap R and B.
int i = 0;
const int len4 = len & ~3;
const __m128i mask = _mm_set1_epi32(0x00ff00ffu);
const int len_max = len & ~3; // max length processed in main loop
const __m128i red_blue_mask = _mm_set1_epi32(0x00ff00ffu);
assert(b == r + 2);
assert(a == r + 3);
for (; i < len4; i += 4) {
for (; i < len_max; i += 4) {
const __m128i A = _mm_loadu_si128((__m128i*)(r + 4 * i));
const __m128i B = _mm_and_si128(A, mask); // R 0 B 0
const __m128i C = _mm_andnot_si128(mask, A); // 0 G 0 A
const __m128i B = _mm_and_si128(A, red_blue_mask); // R 0 B 0
const __m128i C = _mm_andnot_si128(red_blue_mask, A); // 0 G 0 A
const __m128i D = _mm_shufflelo_epi16(B, _MM_SHUFFLE(2, 3, 0, 1));
const __m128i E = _mm_shufflehi_epi16(D, _MM_SHUFFLE(2, 3, 0, 1));
const __m128i F = _mm_or_si128(E, C);