src/cpu/x86/vm/vm_version_x86.hpp

@@ -72,11 +72,12 @@
                         : 1,
                est      : 1,
                         : 1,
                ssse3    : 1,
                cid      : 1,
-                        : 2,
+                        : 1,
+               fma      : 1,
                cmpxchg16: 1,
                         : 4,
                dca      : 1,
                sse4_1   : 1,
                sse4_2   : 1,

@@ -287,10 +288,11 @@
   };
 
 #define CPU_AVX512BW ((uint64_t)UCONST64(0x100000000)) // enums are limited to 31 bit
 #define CPU_AVX512VL ((uint64_t)UCONST64(0x200000000)) // EVEX instructions with smaller vector length
 #define CPU_SHA ((uint64_t)UCONST64(0x400000000))      // SHA instructions
+#define CPU_FMA ((uint64_t)UCONST64(0x800000000))      // FMA instructions
 
   enum Extended_Family {
     // AMD
     CPU_FAMILY_AMD_11H       = 0x11,
     // Intel

@@ -520,10 +522,12 @@
         result |= CPU_BMI2;
       if (_cpuid_info.sef_cpuid7_ebx.bits.sha != 0)
         result |= CPU_SHA;
       if(_cpuid_info.ext_cpuid1_ecx.bits.lzcnt_intel != 0)
         result |= CPU_LZCNT;
+      if (_cpuid_info.std_cpuid1_ecx.bits.fma != 0)
+        result |= CPU_FMA;
       // for Intel, ecx.bits.misalignsse bit (bit 8) indicates support for prefetchw
       if (_cpuid_info.ext_cpuid1_ecx.bits.misalignsse != 0) {
         result |= CPU_3DNOW_PREFETCH;
       }
     }

@@ -724,10 +728,11 @@
   static bool supports_avx512novl() { return (supports_evex() && !supports_avx512vl()); }
   static bool supports_avx512nobw() { return (supports_evex() && !supports_avx512bw()); }
   static bool supports_avx256only() { return (supports_avx2() && !supports_evex()); }
   static bool supports_avxonly()    { return ((supports_avx2() || supports_avx()) && !supports_evex()); }
   static bool supports_sha()        { return (_features & CPU_SHA) != 0; }
+  static bool supports_fma()        { return (_features & CPU_FMA) != 0; }
   // Intel features
   static bool is_intel_family_core() { return is_intel() &&
                                        extended_cpu_family() == CPU_FAMILY_INTEL_CORE; }
 
   static bool is_intel_tsc_synched_at_init()  {