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-rw-r--r--erts/include/internal/ethr_internal.h1
-rw-r--r--erts/include/internal/ethread.h5
-rw-r--r--erts/lib_src/common/ethr_aux.c15
3 files changed, 20 insertions, 1 deletions
diff --git a/erts/include/internal/ethr_internal.h b/erts/include/internal/ethr_internal.h
index d4ded6ff05..693b34df61 100644
--- a/erts/include/internal/ethr_internal.h
+++ b/erts/include/internal/ethr_internal.h
@@ -92,7 +92,6 @@ void ethr_run_exit_handlers__(void);
void ethr_ts_event_destructor__(void *vtsep);
#if defined(ETHR_X86_RUNTIME_CONF__)
-int ethr_x86_have_cpuid__(void);
void ethr_x86_cpuid__(int *eax, int *ebx, int *ecx, int *edx);
#endif
diff --git a/erts/include/internal/ethread.h b/erts/include/internal/ethread.h
index 4eeb7097f4..9956473057 100644
--- a/erts/include/internal/ethread.h
+++ b/erts/include/internal/ethread.h
@@ -282,6 +282,10 @@ ETHR_PROTO_NORETURN__ ethr_fatal_error__(const char *file,
(__builtin_expect(ethr_runtime__.conf.have_sse2 != 0, 1))
# define ETHR_X86_RUNTIME_CONF_HAVE_NO_SSE2__ \
(__builtin_expect(ethr_runtime__.conf.have_sse2 == 0, 0))
+# define ETHR_X86_RUNTIME_CONF_HAVE_RDTSCP__ \
+ (__builtin_expect(ethr_runtime__.conf.have_rdtscp != 0, 1))
+# define ETHR_X86_RUNTIME_CONF_HAVE_NO_RDTSCP__ \
+ (__builtin_expect(ethr_runtime__.conf.have_rdtscp == 0, 0))
#endif
#if (defined(__GNUC__) \
@@ -300,6 +304,7 @@ typedef struct {
#if defined(ETHR_X86_RUNTIME_CONF__)
int have_dw_cmpxchg;
int have_sse2;
+ int have_rdtscp;
#endif
#if defined(ETHR_PPC_RUNTIME_CONF__)
int have_lwsync;
diff --git a/erts/lib_src/common/ethr_aux.c b/erts/lib_src/common/ethr_aux.c
index 56fecf81b8..fbd870c2b5 100644
--- a/erts/lib_src/common/ethr_aux.c
+++ b/erts/lib_src/common/ethr_aux.c
@@ -139,6 +139,21 @@ x86_init(void)
#endif
/* bit 26 of edx is set if we have sse2 */
ethr_runtime__.conf.have_sse2 = (edx & (1 << 26));
+
+ /* check if we have extended feature set */
+ eax = 0x80000000;
+ ethr_x86_cpuid__(&eax, &ebx, &ecx, &edx);
+
+ if (eax >= 0x80000001) {
+ /* Get the extended feature set */
+ eax = 0x80000001;
+ ethr_x86_cpuid__(&eax, &ebx, &ecx, &edx);
+ } else {
+ eax = ebx = ecx = edx = 0;
+ }
+
+ /* bit 27 of edx is set if we have rdtscp */
+ ethr_runtime__.conf.have_rdtscp = (edx & (1 << 27));
}
#endif /* ETHR_X86_RUNTIME_CONF__ */