bgra/rgba interleaved loads

gistfile1.cpp

	// Probably too many registers?
	for (u32 i = 0; i < sseChunks; i += 2) {
		__m128i c = _mm_load_si128(&srcp[i + 0]);
		__m128i c2 = _mm_load_si128(&srcp[i + 1]);
		__m128i rb = _mm_andnot_si128(maskGA, c);
		c = _mm_and_si128(c, maskGA);
		__m128i rb2 = _mm_andnot_si128(maskGA, c2);
		c2 = _mm_and_si128(c2, maskGA);

		__m128i b = _mm_srli_epi32(rb, 16);
		__m128i r = _mm_slli_epi32(rb, 16);
		c = _mm_or_si128(_mm_or_si128(c, r), b);

		__m128i b2 = _mm_srli_epi32(rb, 16);
		__m128i r2 = _mm_slli_epi32(rb, 16);
		c2 = _mm_or_si128(_mm_or_si128(c2, r2), b2);

		_mm_store_si128(&dstp[i + 0], c);
		_mm_store_si128(&dstp[i + 1], c2);
	}