From 5f25bcf7d6918f5c6091fb4e961e5607e13b7324 Mon Sep 17 00:00:00 2001
From: Stephen Zheng <zhengrg3@mail3.sysu.edu.cn>
Date: Fri, 4 Sep 2020 10:55:47 +0000
Subject: Add Inverse_NEON.h

Implemented fast size-4 matrix inverse (mimicking Inverse_SSE.h) using NEON intrinsics.

```
Benchmark                   Time             CPU      Time Old      Time New       CPU Old       CPU New
--------------------------------------------------------------------------------------------------------
BM_float                 -0.1285         -0.1275           568           495           572           499
BM_double                -0.2265         -0.2254           638           494           641           496
```
---
 Eigen/LU | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'Eigen/LU')

diff --git a/Eigen/LU b/Eigen/LU
index 6418a86e1..ca72f1357 100644
--- a/Eigen/LU
+++ b/Eigen/LU
@@ -44,6 +44,10 @@
   #include "src/LU/arch/Inverse_SSE.h"
 #endif
 
+#if defined EIGEN_VECTORIZE_NEON
+  #include "src/LU/arch/Inverse_NEON.h"
+#endif
+
 #include "src/Core/util/ReenableStupidWarnings.h"
 
 #endif // EIGEN_LU_MODULE_H
-- 
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