From: Vincent Rabaud <no@email>
Date: Sun, 13 Mar 2011 22:51:33 +0000 (+0000)
Subject: - add support for the popcnt instruction (useful for the Hamming distance, soon to... 
X-Git-Tag: accepted/tizen/6.0/unified/20201030.111113~7633
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=578ca872e4ba042bcdb88ea05593b40315a90cc8;p=platform%2Fupstream%2Fopencv.git

- add support for the popcnt instruction (useful for the Hamming distance, soon to come in BRIEF and FLANN)
---

diff --git a/modules/core/include/opencv2/core/core.hpp b/modules/core/include/opencv2/core/core.hpp
index 57cfcae..ba6a0d1 100644
--- a/modules/core/include/opencv2/core/core.hpp
+++ b/modules/core/include/opencv2/core/core.hpp
@@ -262,6 +262,7 @@ CV_EXPORTS int64 getCPUTickCount();
   - CV_CPU_SSSE3 - SSSE 3
   - CV_CPU_SSE4_1 - SSE 4.1
   - CV_CPU_SSE4_2 - SSE 4.2
+  - CV_CPU_POPCNT - POPCOUNT
   - CV_CPU_AVX - AVX
   
   \note {Note that the function output is not static. Once you called cv::useOptimized(false),
diff --git a/modules/core/include/opencv2/core/core_c.h b/modules/core/include/opencv2/core/core_c.h
index cfd8bf4..8e0b770 100644
--- a/modules/core/include/opencv2/core/core_c.h
+++ b/modules/core/include/opencv2/core/core_c.h
@@ -1705,6 +1705,7 @@ CVAPI(double) cvGetTickFrequency( void );
 #define CV_CPU_SSSE3   5
 #define CV_CPU_SSE4_1  6
 #define CV_CPU_SSE4_2  7
+#define CV_CPU_POPCNT  8
 #define CV_CPU_AVX    10
 #define CV_HARDWARE_MAX_FEATURE 255
 
diff --git a/modules/core/src/system.cpp b/modules/core/src/system.cpp
index f3f156d..bae3780 100644
--- a/modules/core/src/system.cpp
+++ b/modules/core/src/system.cpp
@@ -139,6 +139,7 @@ struct HWFeatures
             f.have[CV_CPU_SSSE3]  = (cpuid_data[2] & (1<<9)) != 0;
             f.have[CV_CPU_SSE4_1] = (cpuid_data[2] & (1<<19)) != 0;
             f.have[CV_CPU_SSE4_2] = (cpuid_data[2] & (1<<20)) != 0;
+            f.have[CV_CPU_POPCNT] = (cpuid_data[2] & (1<<23)) != 0;
             f.have[CV_CPU_AVX]    = (cpuid_data[2] & (1<<28)) != 0;
         }