diff options
| author | xiangmingzhu <xiangzhu@cisco.com> | 2014-04-30 11:48:07 +0400 |
|---|---|---|
| committer | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2014-10-04 05:16:00 +0400 |
| commit | c95c9a048f3283afb2e412b10085d4f7c19e1412 (patch) | |
| tree | ed8873af6559d7a98922e0fed85be47c826ef521 /silk/A2NLSF.c | |
| parent | 80460334b77d70e665a390503cd8992cdad06c10 (diff) | |
Cisco optimization for x86 & fixed point
1. Only for fixed point on x86 platform (32bit and 64bit, uses SIMD
intrinsics up to SSE4.2)
2. Use "configure --enable-fixed-point --enable-intrinsics" to enable
optimization, default is disabled.
3. Official test cases are verified and passed.
Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>
Diffstat (limited to 'silk/A2NLSF.c')
| -rw-r--r-- | silk/A2NLSF.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/silk/A2NLSF.c b/silk/A2NLSF.c index 74b1b95d..b6e9e5ff 100644 --- a/silk/A2NLSF.c +++ b/silk/A2NLSF.c @@ -71,8 +71,23 @@ static OPUS_INLINE opus_int32 silk_A2NLSF_eval_poly( /* return the polynomial ev y32 = p[ dd ]; /* Q16 */ x_Q16 = silk_LSHIFT( x, 4 ); - for( n = dd - 1; n >= 0; n-- ) { - y32 = silk_SMLAWW( p[ n ], y32, x_Q16 ); /* Q16 */ + + if ( opus_likely( 8 == dd ) ) + { + y32 = silk_SMLAWW( p[ 7 ], y32, x_Q16 ); + y32 = silk_SMLAWW( p[ 6 ], y32, x_Q16 ); + y32 = silk_SMLAWW( p[ 5 ], y32, x_Q16 ); + y32 = silk_SMLAWW( p[ 4 ], y32, x_Q16 ); + y32 = silk_SMLAWW( p[ 3 ], y32, x_Q16 ); + y32 = silk_SMLAWW( p[ 2 ], y32, x_Q16 ); + y32 = silk_SMLAWW( p[ 1 ], y32, x_Q16 ); + y32 = silk_SMLAWW( p[ 0 ], y32, x_Q16 ); + } + else + { + for( n = dd - 1; n >= 0; n-- ) { + y32 = silk_SMLAWW( p[ n ], y32, x_Q16 ); /* Q16 */ + } } return y32; } |