#include "cpu.h"
+#if V8_CC_MSVC
+#include <intrin.h> // __cpuid()
+#endif
+
#include <algorithm>
#include <cctype>
#include <cstdio>
#if V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64
-#if V8_CC_MSVC
-
-#include <intrin.h> // NOLINT
-
-#elif defined(__i386__) && defined(__pic__)
+// Define __cpuid() for non-MSVC compilers.
+#if !V8_CC_MSVC
static V8_INLINE(void __cpuid(int cpu_info[4], int info_type)) {
+#if defined(__i386__) && defined(__pic__)
+ // Make sure to preserve ebx, which contains the pointer
+ // to the GOT in case we're generating PIC.
__asm__ volatile (
- "mov %%ebx, %%edi\n"
- "cpuid\n"
- "xchg %%edi, %%ebx\n"
+ "mov %%ebx, %%edi\n\t"
+ "cpuid\n\t"
+ "xchg %%edi, %%ebx\n\t"
: "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
: "a"(info_type)
);
-}
-
-#else // !V8_CC_MSVC || (!defined(__i386__) && !defined(__pic__))
-
-static V8_INLINE(void __cpuid(int cpu_info[4], int info_type)) {
+#else
__asm__ volatile (
"cpuid \n\t"
: "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
: "a"(info_type)
);
+#endif // defined(__i386__) && defined(__pic__)
}
-#endif
+#endif // !V8_CC_MSVC
#elif V8_HOST_ARCH_ARM || V8_HOST_ARCH_MIPS