Gael Guennebaud
b477d60bc6
Extend the generic psin_float code to handle cosine and make SSE and AVX use it (-> this adds pcos for AVX)
2018-11-30 11:26:30 +01:00
Gael Guennebaud
fa7fd61eda
Unify SSE/AVX psin functions.
...
It is based on the SSE version which is much more accurate, though very slightly slower.
This changeset also includes the following required changes:
- add packet-float to packet-int type traits
- add packet float<->int reinterpret casts
- add faster pselect for AVX based on blendv
2018-11-27 22:41:51 +01:00
Gael Guennebaud
7655a8af6e
cleanup
2018-11-26 23:21:29 +01:00
Gael Guennebaud
502f92fa10
Unify SSE and AVX pexp for double.
2018-11-26 23:12:44 +01:00
Gael Guennebaud
cf8b85d5c5
Unify SSE and AVX implementation of pexp
2018-11-26 16:36:19 +01:00
Gael Guennebaud
2c44c40114
First step toward a unification of packet log implementation, currently only SSE and AVX are unified.
...
To this end, I added the following functions: pzero, pcmp_*, pfrexp, pset1frombits functions.
2018-11-26 14:21:24 +01:00
Rasmus Munk Larsen
47150af1c8
Fix copy-paste error: Must use _mm256_cmp_ps for AVX.
2016-10-12 08:34:39 -07:00
Rasmus Munk Larsen
7f67e6dfdb
Update comment for fast sqrt.
2016-10-04 15:09:11 -07:00
Rasmus Munk Larsen
3ed67cb0bb
Fix a bug in the implementation of Carmack's fast sqrt algorithm in Eigen (enabled by EIGEN_FAST_MATH), which causes the vectorized parts of the computation to return -0.0 instead of NaN for negative arguments.
...
Benchmark speed in Giga-sqrts/s
Intel(R) Xeon(R) CPU E5-1650 v3 @ 3.50GHz
-----------------------------------------
SSE AVX
Fast=1 2.529G 4.380G
Fast=0 1.944G 1.898G
Fast=1 fixed 2.214G 3.739G
This table illustrates the worst case in terms speed impact: It was measured by repeatedly computing the sqrt of an n=4096 float vector that fits in L1 cache. For large vectors the operation becomes memory bound and the differences between the different versions almost negligible.
2016-10-04 14:22:56 -07:00
Gael Guennebaud
a4c266f827
Factorize the 4 copies of tanh implementations, make numext::tanh consistent with array::tanh, enable fast tanh in fast-math mode only.
2016-08-23 14:23:08 +02:00
Benoit Steiner
8ce46f9d89
Improved implementation of ptanh for SSE and AVX
2016-02-18 13:24:34 -08:00
Benoit Steiner
6d8b1dce06
Avoid implicit cast from double to float.
2016-02-10 18:07:11 -08:00
Benoit Steiner
2d523332b3
Optimized implementation of the hyperbolic tangent function for AVX
2016-02-10 08:48:05 -08:00
Gael Guennebaud
d2e288ae50
Workaround compilers that do not even define _mm256_set_m128.
2015-12-24 16:53:43 +01:00
Benoit Steiner
6d777e1bc7
Fixed a typo.
2015-12-18 19:25:50 -08:00
Gael Guennebaud
3abd8470ca
bug #1140 : remove custom definition and use of _mm256_setr_m128
2015-12-18 14:18:59 +01:00
Gael Guennebaud
75861f6650
bug #1069 : fix AVX support on MSVC (use of non portable C-style cast)
2015-09-28 10:08:26 +02:00
Benoit Steiner
1dded10cb7
Added a double-precision implementation of the exp() function for AVX.
2015-05-04 10:42:51 -07:00
Benoit Steiner
0196141938
Fixed the optimized AVX implementation of the fast rsqrt function
2015-03-02 13:49:39 -08:00
Benoit Steiner
4fd7f47692
Added an optimized version of rsqrt for SSE and AVX that is used when EIGEN_FAST_MATH is defined.
2015-03-02 09:38:47 -08:00
Benoit Steiner
f41b1f1666
Added support for fast reciprocal square root computation.
2015-02-26 09:42:41 -08:00
Benoit Steiner
0927801a84
Optimized version of the sin(), exp(), log() and sqrt() function for AVX
2015-02-13 16:07:08 -08:00
