Adds SSE-accelerated lpc functions.

New functions are:
    FLAC__lpc_compute_autocorrelation_intrin_sse_lag_4()
    FLAC__lpc_compute_autocorrelation_intrin_sse_lag_8()
    FLAC__lpc_compute_autocorrelation_intrin_sse_lag_12()
    FLAC__lpc_compute_autocorrelation_intrin_sse_lag_16()
    FLAC__lpc_compute_residual_from_qlp_coefficients_16_intrin_sse2()

Patch-from: lvqcl <lvqcl.mail@gmail.com>
7 files changed