Detect Intel's Multi-Precision Add-Carry Instruction Extensions

See d35e2f38eb

src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/cpu_features/include/cpuinfo_x86.h

@@ -79,6 +79,7 @@ typedef struct
 
     int dca : 1;
     int ss : 1;
+    int adx : 1;
     // Make sure to update X86FeaturesEnum below if you add a field here.
 } X86Features;
 
@@ -207,6 +208,7 @@ typedef enum
     X86_RDRND,
     X86_DCA,
     X86_SS,
+    X86_ADX,
     X86_LAST_,
 } X86FeaturesEnum;
 

src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/cpu_features/src/cpuinfo_x86.c

@@ -74,7 +74,8 @@
     FEATURE(X86_MOVBE, movbe, "movbe", 0, 0)                                     \
     FEATURE(X86_RDRND, rdrnd, "rdrnd", 0, 0)                                     \
     FEATURE(X86_DCA, dca, "dca", 0, 0)                                           \
-    FEATURE(X86_SS, ss, "ss", 0, 0)
+    FEATURE(X86_SS, ss, "ss", 0, 0)                                              \
+    FEATURE(X86_ADX, adx, "adx", 0, 0)
 #define DEFINE_TABLE_FEATURE_TYPE X86Features
 #define DEFINE_TABLE_DONT_GENERATE_HWCAPS
 #include "define_tables.h"
@@ -1347,6 +1348,7 @@ static void ParseCpuId(const uint32_t max_cpuid_leaf,
     features->sha = IsBitSet(leaf_7.ebx, 29);
     features->vaes = IsBitSet(leaf_7.ecx, 9);
     features->vpclmulqdq = IsBitSet(leaf_7.ecx, 10);
+    features->adx = IsBitSet(leaf_7.ebx, 19);
 
     if (os_support.have_sse_via_os)
         {

src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/cpu_features/test/cpuinfo_x86_test.cc

@@ -150,6 +150,7 @@ TEST_F(CpuidX86Test, SandyBridge)
     EXPECT_TRUE(features.popcnt);
     EXPECT_FALSE(features.movbe);
     EXPECT_FALSE(features.rdrnd);
+    EXPECT_FALSE(features.adx);
 }
 
 const int KiB = 1024;