+/// GetCpuIDAndInfoEx - Execute the specified cpuid with subleaf and return the
+/// 4 values in the specified arguments. If we can't run cpuid on the host,
+/// return true.
+bool X86_MC::GetCpuIDAndInfoEx(unsigned value, unsigned subleaf, unsigned *rEAX,
+ unsigned *rEBX, unsigned *rECX, unsigned *rEDX) {
+#if defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64)
+ #if defined(__GNUC__)
+ // gcc desn't know cpuid would clobber ebx/rbx. Preseve it manually.
+ asm ("movq\t%%rbx, %%rsi\n\t"
+ "cpuid\n\t"
+ "xchgq\t%%rbx, %%rsi\n\t"
+ : "=a" (*rEAX),
+ "=S" (*rEBX),
+ "=c" (*rECX),
+ "=d" (*rEDX)
+ : "a" (value),
+ "c" (subleaf));
+ return false;
+ #elif defined(_MSC_VER)
+ // can't use __cpuidex because it isn't available in all supported versions
+ // of MSC
+ __asm {
+ mov eax,value
+ mov ecx,subleaf
+ cpuid
+ mov rsi,rEAX
+ mov dword ptr [rsi],eax
+ mov rsi,rEBX
+ mov dword ptr [rsi],ebx
+ mov rsi,rECX
+ mov dword ptr [rsi],ecx
+ mov rsi,rEDX
+ mov dword ptr [rsi],edx
+ }
+ return false;
+ #endif
+#elif defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)
+ #if defined(__GNUC__)
+ asm ("movl\t%%ebx, %%esi\n\t"
+ "cpuid\n\t"
+ "xchgl\t%%ebx, %%esi\n\t"
+ : "=a" (*rEAX),
+ "=S" (*rEBX),
+ "=c" (*rECX),
+ "=d" (*rEDX)
+ : "a" (value),
+ "c" (subleaf));
+ return false;
+ #elif defined(_MSC_VER)
+ __asm {
+ mov eax,value
+ mov ecx,subleaf
+ cpuid
+ mov esi,rEAX
+ mov dword ptr [esi],eax
+ mov esi,rEBX
+ mov dword ptr [esi],ebx
+ mov esi,rECX
+ mov dword ptr [esi],ecx
+ mov esi,rEDX
+ mov dword ptr [esi],edx
+ }
+ return false;
+ #endif
+#endif
+ return true;
+}
+