Benchmarking: added option to deactivate SIMD for decimators

CMakeLists.txt

@@ -30,6 +30,7 @@ option(DEBUG_OUTPUT "Print debug messages" OFF)
 option(SANITIZE_ADDRESS "Activate memory address sanitization" OFF)
 option(HOST_RPI "Compiling on RPi" OFF)
 option(RX_SAMPLE_24BIT "Internal 24 bit Rx DSP" OFF)
+option(NO_DSP_SIMD "Do not ese SIMD instructions for DSP even if available" OFF)
 
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)
 
@@ -203,6 +204,13 @@ if (SANITIZE_ADDRESS)
     set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} -fsanitize=address")
 endif()
 
+if (NO_DSP_SIMD)
+    message(STATUS "Not compiling with SIMD instructions for DSP even if available")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DNO_DSP_SIMD")
+else()
+    message(STATUS "Compiling with SIMD instructions for DSP if available")
+endif()
+
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wvla -Woverloaded-virtual -ffast-math -ftree-vectorize ${EXTRA_FLAGS}")
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")

sdrbase/dsp/decimators.h

@@ -18,7 +18,7 @@
 #define INCLUDE_GPL_DSP_DECIMATORS_H_
 
 #include "dsp/dsptypes.h"
-#ifdef SDR_RX_SAMPLE_24BIT
+#if defined(SDR_RX_SAMPLE_24BIT) || defined(NO_SIMD_DSP)
 #include "dsp/inthalfbandfilterdb.h"
 #else
 #ifdef USE_SSE4_1
@@ -331,7 +331,7 @@ public:
     void decimate64_cen(SampleVector::iterator* it, const T* bufI, const T* bufQ, qint32 len);
 
 private:
-#ifdef SDR_RX_SAMPLE_24BIT
+#if defined(SDR_RX_SAMPLE_24BIT) || defined(NO_SIMD_DSP)
     IntHalfbandFilterDB<qint64, DECIMATORS_HB_FILTER_ORDER> m_decimator2;  // 1st stages
     IntHalfbandFilterDB<qint64, DECIMATORS_HB_FILTER_ORDER> m_decimator4;  // 2nd stages
     IntHalfbandFilterDB<qint64, DECIMATORS_HB_FILTER_ORDER> m_decimator8;  // 3rd stages