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// If we have SSSE3 support, pick off 12 bytes at a time for as long as we can. 
// But because we read 16 bytes at a time, ensure we have enough room to do a 
// full 16-byte read without segfaulting: 
while (srclen >= 16) 
{ 
	// Load string: 
	__m128i str = _mm_loadu_si128((__m128i *)c); 
 
	// Reshuffle: 
	str = enc_reshuffle(str); 
 
	// Translate reshuffled bytes to the Base64 alphabet: 
	str = enc_translate(str); 
 
	// Store: 
	_mm_storeu_si128((__m128i *)o, str); 
 
	c += 12;	// 3 * 4 bytes of input 
	o += 16;	// 4 * 4 bytes of output 
	outl += 16; 
	srclen -= 12; 
}