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Don't use intrinsics when they are slower.

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More thorough en-/decoding tests show that sometimes the functions
that use intrinsics are slower (or not really faster) than old
plain C functions.

After this patch the encoder doesn't use these new functions
when their usefulness is questionable.

Patch-from: lvqcl <lvqcl.mail@gmail.com>
This commit is contained in:
Erik de Castro Lopo
2014-02-24 21:45:32 +11:00
parent 4be8ed8efe
commit cf0e42ae6e
3 changed files with 7 additions and 10 deletions
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2
src/libFLAC/stream_encoder.c
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@@ -957,7 +957,7 @@ static FLAC__StreamEncoderInitStatus init_stream_internal_(
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_16;
# endif
# ifdef FLAC__SSE2_SUPPORTED
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_intrin_sse2;
/* encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_intrin_sse2; // OPT: not faster than C; TODO: more tests on different CPUs */
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_16_intrin_sse2;
# endif
# endif /* FLAC__HAS_X86INTRIN */