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head/lib/libc/x86/sys/__vdso_gettc.c
| Show First 20 Lines • Show All 66 Lines • ▼ Show 20 Lines | rdtsc_mb_mfence(void) | ||||
| mfence(); | mfence(); | ||||
| } | } | ||||
| static void | static void | ||||
| rdtsc_mb_none(void) | rdtsc_mb_none(void) | ||||
| { | { | ||||
| } | } | ||||
| DEFINE_UIFUNC(static, void, rdtsc_mb, (void), static) | DEFINE_UIFUNC(static, void, rdtsc_mb, (void)) | ||||
| { | { | ||||
| u_int p[4]; | u_int p[4]; | ||||
| /* Not a typo, string matches our do_cpuid() registers use. */ | /* Not a typo, string matches our do_cpuid() registers use. */ | ||||
| static const char intel_id[] = "GenuntelineI"; | static const char intel_id[] = "GenuntelineI"; | ||||
| if ((cpu_feature & CPUID_SSE2) == 0) | if ((cpu_feature & CPUID_SSE2) == 0) | ||||
| return (rdtsc_mb_none); | return (rdtsc_mb_none); | ||||
| do_cpuid(0, p); | do_cpuid(0, p); | ||||
| ▲ Show 20 Lines • Show All 187 Lines • Show Last 20 Lines | |||||