opencv
diff --git a/‎3rdparty/libpng/CMakeLists.txt
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+9Lines changed: 9 additions & 0 deletions b/‎3rdparty/libpng/CMakeLists.txt
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+9Lines changed: 9 additions & 0 deletions
diff --git a/‎3rdparty/libpng/mips/filter_msa_intrinsics.c
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+808Lines changed: 808 additions & 0 deletions b/‎3rdparty/libpng/mips/filter_msa_intrinsics.c
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diff --git a/‎3rdparty/libpng/mips/mips_init.c
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+127Lines changed: 127 additions & 0 deletions b/‎3rdparty/libpng/mips/mips_init.c
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+127Lines changed: 127 additions & 0 deletions
diff --git a/‎3rdparty/libwebp/src/dsp/msa_macro.h
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+2-2Lines changed: 2 additions & 2 deletions b/‎3rdparty/libwebp/src/dsp/msa_macro.h
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+2-2Lines changed: 2 additions & 2 deletions
diff --git a/‎cmake/OpenCVCompilerOptimizations.cmake
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+6Lines changed: 6 additions & 0 deletions b/‎cmake/OpenCVCompilerOptimizations.cmake
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diff --git a/‎cmake/OpenCVDetectCXXCompiler.cmake
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+2Lines changed: 2 additions & 0 deletions b/‎cmake/OpenCVDetectCXXCompiler.cmake
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diff --git a/‎cmake/checks/cpu_msa.cpp
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+23Lines changed: 23 additions & 0 deletions b/‎cmake/checks/cpu_msa.cpp
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+23Lines changed: 23 additions & 0 deletions
diff --git a/‎modules/core/include/opencv2/core/cv_cpu_dispatch.h
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+9Lines changed: 9 additions & 0 deletions b/‎modules/core/include/opencv2/core/cv_cpu_dispatch.h
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diff --git a/‎modules/core/include/opencv2/core/cv_cpu_helper.h
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+21Lines changed: 21 additions & 0 deletions b/‎modules/core/include/opencv2/core/cv_cpu_helper.h
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diff --git a/‎modules/core/include/opencv2/core/cvdef.h
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+4Lines changed: 4 additions & 0 deletions b/‎modules/core/include/opencv2/core/cvdef.h
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+4Lines changed: 4 additions & 0 deletions
@@ -46,6 +46,15 @@ if(";${CPU_BASELINE_FINAL};" MATCHES "SSE2"
   add_definitions(-DPNG_INTEL_SSE)
 endif()
 
+# set definitions and sources for MIPS
+if(";${CPU_BASELINE_FINAL};" MATCHES "MSA")
+    list(APPEND lib_srcs mips/mips_init.c mips/filter_msa_intrinsics.c)
+    add_definitions(-DPNG_MIPS_MSA_OPT=2)
+    ocv_warnings_disable(CMAKE_C_FLAGS -Wshadow)
+else()
+    add_definitions(-DPNG_MIPS_MSA_OPT=0)
+endif()
+
 if(PPC64LE OR PPC64)
   # VSX3 features are backwards compatible
   if(";${CPU_BASELINE_FINAL};" MATCHES "VSX.*"
 
@@ -0,0 +1,127 @@
+
+/* mips_init.c - MSA optimised filter functions
+ *
+ * Copyright (c) 2018 Cosmin Truta
+ * Copyright (c) 2016 Glenn Randers-Pehrson
+ * Written by Mandar Sahastrabuddhe, 2016.
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+
+/* Below, after checking __linux__, various non-C90 POSIX 1003.1 functions are
+ * called.
+ */
+#define _POSIX_SOURCE 1
+
+#include <stdio.h>
+#include "../pngpriv.h"
+
+#ifdef PNG_READ_SUPPORTED
+
+#if PNG_MIPS_MSA_OPT > 0
+#ifdef PNG_MIPS_MSA_CHECK_SUPPORTED /* Do run-time checks */
+/* WARNING: it is strongly recommended that you do not build libpng with
+ * run-time checks for CPU features if at all possible.  In the case of the MIPS
+ * MSA instructions there is no processor-specific way of detecting the
+ * presence of the required support, therefore run-time detection is extremely
+ * OS specific.
+ *
+ * You may set the macro PNG_MIPS_MSA_FILE to the file name of file containing
+ * a fragment of C source code which defines the png_have_msa function.  There
+ * are a number of implementations in contrib/mips-msa, but the only one that
+ * has partial support is contrib/mips-msa/linux.c - a generic Linux
+ * implementation which reads /proc/cpufino.
+ */
+#ifndef PNG_MIPS_MSA_FILE
+#  ifdef __linux__
+#     define PNG_MIPS_MSA_FILE "contrib/mips-msa/linux.c"
+#  endif
+#endif
+
+#ifdef PNG_MIPS_MSA_FILE
+
+#include <signal.h> /* for sig_atomic_t */
+static int png_have_msa(png_structp png_ptr);
+#include PNG_MIPS_MSA_FILE
+
+#else  /* PNG_MIPS_MSA_FILE */
+#  error "PNG_MIPS_MSA_FILE undefined: no support for run-time MIPS MSA checks"
+#endif /* PNG_MIPS_MSA_FILE */
+#endif /* PNG_MIPS_MSA_CHECK_SUPPORTED */
+
+#ifndef PNG_ALIGNED_MEMORY_SUPPORTED
+#  error "ALIGNED_MEMORY is required; set: -DPNG_ALIGNED_MEMORY_SUPPORTED"
+#endif
+
+void
+png_init_filter_functions_msa(png_structp pp, unsigned int bpp)
+{
+   /* The switch statement is compiled in for MIPS_MSA_API, the call to
+    * png_have_msa is compiled in for MIPS_MSA_CHECK. If both are defined
+    * the check is only performed if the API has not set the MSA option on
+    * or off explicitly. In this case the check controls what happens.
+    */
+
+#ifdef PNG_MIPS_MSA_API_SUPPORTED
+   switch ((pp->options >> PNG_MIPS_MSA) & 3)
+   {
+      case PNG_OPTION_UNSET:
+         /* Allow the run-time check to execute if it has been enabled -
+          * thus both API and CHECK can be turned on.  If it isn't supported
+          * this case will fall through to the 'default' below, which just
+          * returns.
+          */
+#ifdef PNG_MIPS_MSA_CHECK_SUPPORTED
+         {
+            static volatile sig_atomic_t no_msa = -1; /* not checked */
+
+            if (no_msa < 0)
+               no_msa = !png_have_msa(pp);
+
+            if (no_msa)
+               return;
+         }
+#endif /* PNG_MIPS_MSA_CHECK_SUPPORTED */
+         break;
+
+      default: /* OFF or INVALID */
+         return;
+
+      case PNG_OPTION_ON:
+         /* Option turned on */
+         break;
+   }
+   /* IMPORTANT: any new external functions used here must be declared using
+    * PNG_INTERNAL_FUNCTION in ../pngpriv.h.  This is required so that the
+    * 'prefix' option to configure works:
+    *
+    *    ./configure --with-libpng-prefix=foobar_
+    *
+    * Verify you have got this right by running the above command, doing a build
+    * and examining pngprefix.h; it must contain a #define for every external
+    * function you add.  (Notice that this happens automatically for the
+    * initialization function.)
+    */
+   pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_msa;
+
+   if (bpp == 3)
+   {
+      pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_msa;
+      pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_msa;
+      pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = png_read_filter_row_paeth3_msa;
+   }
+   else if (bpp == 4)
+   {
+      pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_msa;
+      pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_msa;
+      pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = png_read_filter_row_paeth4_msa;
+   }
+#else
+   (void)pp;
+   (void)bpp;
+#endif /* PNG_MIPS_MSA_API_SUPPORTED */
+}
+#endif /* PNG_MIPS_MSA_OPT > 0 */
+#endif /* READ */
@@ -73,7 +73,7 @@
   static inline TYPE FUNC_NAME(const void* const psrc) {  \
     const uint8_t* const psrc_m = (const uint8_t*)psrc;   \
     TYPE val_m;                                           \
-    asm volatile (                                        \
+    __asm__ volatile (                                        \
       "" #INSTR " %[val_m], %[psrc_m]  \n\t"              \
       : [val_m] "=r" (val_m)                              \
       : [psrc_m] "m" (*psrc_m));                          \
@@ -86,7 +86,7 @@
   static inline void FUNC_NAME(TYPE val, void* const pdst) { \
     uint8_t* const pdst_m = (uint8_t*)pdst;                  \
     TYPE val_m = val;                                        \
-    asm volatile (                                           \
+    __asm__ volatile (                                           \
       " " #INSTR "  %[val_m],  %[pdst_m]  \n\t"              \
       : [pdst_m] "=m" (*pdst_m)                              \
       : [val_m] "r" (val_m));                                \
 
@@ -45,6 +45,7 @@
 set(CPU_ALL_OPTIMIZATIONS "SSE;SSE2;SSE3;SSSE3;SSE4_1;SSE4_2;POPCNT;AVX;FP16;AVX2;FMA3;AVX_512F")
 list(APPEND CPU_ALL_OPTIMIZATIONS "AVX512_COMMON;AVX512_KNL;AVX512_KNM;AVX512_SKX;AVX512_CNL;AVX512_CEL;AVX512_ICL")
 list(APPEND CPU_ALL_OPTIMIZATIONS NEON VFPV3 FP16)
+list(APPEND CPU_ALL_OPTIMIZATIONS MSA)
 list(APPEND CPU_ALL_OPTIMIZATIONS VSX VSX3)
 list(REMOVE_DUPLICATES CPU_ALL_OPTIMIZATIONS)
 
@@ -339,6 +340,11 @@ elseif(ARM OR AARCH64)
     ocv_update(CPU_FP16_IMPLIES "NEON")
     set(CPU_BASELINE "NEON;FP16" CACHE STRING "${HELP_CPU_BASELINE}")
   endif()
+elseif(MIPS)
+  ocv_update(CPU_MSA_TEST_FILE "${OpenCV_SOURCE_DIR}/cmake/checks/cpu_msa.cpp")
+  ocv_update(CPU_KNOWN_OPTIMIZATIONS "MSA")
+  ocv_update(CPU_MSA_FLAGS_ON "-mmsa")
+  set(CPU_BASELINE "MSA" CACHE STRING "${HELP_CPU_BASELINE}")
 elseif(PPC64LE)
   ocv_update(CPU_KNOWN_OPTIMIZATIONS "VSX;VSX3")
   ocv_update(CPU_VSX_TEST_FILE "${OpenCV_SOURCE_DIR}/cmake/checks/cpu_vsx.cpp")
 
@@ -100,6 +100,8 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc)64le")
   set(PPC64LE 1)
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc)64")
   set(PPC64 1)
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(mips.*|MIPS.*)")
+  set(MIPS 1)
 endif()
 
 # Workaround for 32-bit operating systems on x86_64/aarch64 processor
 
@@ -0,0 +1,23 @@
+#include <stdio.h>
+
+#if defined(__mips_msa)
+#  include <msa.h>
+#  define CV_MSA 1
+#endif
+
+#if defined CV_MSA
+int test()
+{
+    const float src[] = { 0.0f, 0.0f, 0.0f, 0.0f };
+    v4f32 val = (v4f32)__msa_ld_w((const float*)(src), 0);
+    return __msa_copy_s_w(__builtin_msa_ftint_s_w (val), 0);
+}
+#else
+#error "MSA is not supported"
+#endif
+
+int main()
+{
+  printf("%d\n", test());
+  return 0;
+}
@@ -152,6 +152,11 @@
 #  define CV_VSX3 1
 #endif
 
+#ifdef CV_CPU_COMPILE_MSA
+#  include "hal/msa_macros.h"
+#  define CV_MSA 1
+#endif
+
 #endif // CV_ENABLE_INTRINSICS && !CV_DISABLE_OPTIMIZATION && !__CUDACC__
 
 #if defined CV_CPU_COMPILE_AVX && !defined CV_CPU_BASELINE_COMPILE_AVX
@@ -319,3 +324,7 @@ struct VZeroUpperGuard {
 #ifndef CV_VSX3
 #  define CV_VSX3 0
 #endif
+
+#ifndef CV_MSA
+#  define CV_MSA 0
+#endif
@@ -420,6 +420,27 @@
 #endif
 #define __CV_CPU_DISPATCH_CHAIN_NEON(fn, args, mode, ...)  CV_CPU_CALL_NEON(fn, args); __CV_EXPAND(__CV_CPU_DISPATCH_CHAIN_ ## mode(fn, args, __VA_ARGS__))
 
+#if !defined CV_DISABLE_OPTIMIZATION && defined CV_ENABLE_INTRINSICS && defined CV_CPU_COMPILE_MSA
+#  define CV_TRY_MSA 1
+#  define CV_CPU_FORCE_MSA 1
+#  define CV_CPU_HAS_SUPPORT_MSA 1
+#  define CV_CPU_CALL_MSA(fn, args) return (cpu_baseline::fn args)
+#  define CV_CPU_CALL_MSA_(fn, args) return (opt_MSA::fn args)
+#elif !defined CV_DISABLE_OPTIMIZATION && defined CV_ENABLE_INTRINSICS && defined CV_CPU_DISPATCH_COMPILE_MSA
+#  define CV_TRY_MSA 1
+#  define CV_CPU_FORCE_MSA 0
+#  define CV_CPU_HAS_SUPPORT_MSA (cv::checkHardwareSupport(CV_CPU_MSA))
+#  define CV_CPU_CALL_MSA(fn, args) if (CV_CPU_HAS_SUPPORT_MSA) return (opt_MSA::fn args)
+#  define CV_CPU_CALL_MSA_(fn, args) if (CV_CPU_HAS_SUPPORT_MSA) return (opt_MSA::fn args)
+#else
+#  define CV_TRY_MSA 0
+#  define CV_CPU_FORCE_MSA 0
+#  define CV_CPU_HAS_SUPPORT_MSA 0
+#  define CV_CPU_CALL_MSA(fn, args)
+#  define CV_CPU_CALL_MSA_(fn, args)
+#endif
+#define __CV_CPU_DISPATCH_CHAIN_MSA(fn, args, mode, ...)  CV_CPU_CALL_MSA(fn, args); __CV_EXPAND(__CV_CPU_DISPATCH_CHAIN_ ## mode(fn, args, __VA_ARGS__))
+
 #if !defined CV_DISABLE_OPTIMIZATION && defined CV_ENABLE_INTRINSICS && defined CV_CPU_COMPILE_VSX
 #  define CV_TRY_VSX 1
 #  define CV_CPU_FORCE_VSX 1
 
@@ -258,6 +258,8 @@ namespace cv { namespace debug_build_guard { } using namespace debug_build_guard
 
 #define CV_CPU_NEON             100
 
+#define CV_CPU_MSA              150
+
 #define CV_CPU_VSX              200
 #define CV_CPU_VSX3             201
 
@@ -308,6 +310,8 @@ enum CpuFeatures {
 
     CPU_NEON            = 100,
 
+    CPU_MSA             = 150,
+
     CPU_VSX             = 200,
     CPU_VSX3            = 201,