Function wasmMoveMask

SHTest/Externals/meshoptimizer/vertexcodec.cpp:769–777

}

SIMD_TARGET
static void wasmMoveMask(v128_t mask, unsigned char& mask0, unsigned char& mask1)
{
	// magic constant found using z3 SMT assuming mask has 8 groups of 0xff or 0x00
	const uint64_t magic = 0x000103070f1f3f80ull;

	mask0 = uint8_t((wasm_i64x2_extract_lane(mask, 0) * magic) >> 56);
	mask1 = uint8_t((wasm_i64x2_extract_lane(mask, 1) * magic) >> 56);
}

SIMD_TARGET
static const unsigned char* decodeBytesGroupSimd(const unsigned char* data, unsigned char* buffer, int bitslog2)