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Feature: Add use of Intel Intrinsics & RDTSC on e2k (MCST Elbrus 2000) #9575

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merged 1 commit into from Sep 26, 2021
Merged

Feature: Add use of Intel Intrinsics & RDTSC on e2k (MCST Elbrus 2000) #9575

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30 changes: 30 additions & 0 deletions src/cpu.cpp
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Expand Up @@ -73,6 +73,18 @@ uint64 ottd_rdtsc()
# define RDTSC_AVAILABLE
#endif

/* rdtsc for MCST Elbrus 2000 */
#if defined(__e2k__) && !defined(RDTSC_AVAILABLE)
uint64 ottd_rdtsc()
{
uint64_t dst;
# pragma asm_inline
asm("rrd %%clkr, %0" : "=r" (dst));
return dst;
}
# define RDTSC_AVAILABLE
#endif

#if defined(__EMSCRIPTEN__) && !defined(RDTSC_AVAILABLE)
/* On emscripten doing TIC/TOC would be ill-advised */
uint64 ottd_rdtsc() {return 0;}
Expand Down Expand Up @@ -131,6 +143,24 @@ void ottd_cpuid(int info[4], int type)
);
#endif /* i386 PIC */
}
#elif defined(__e2k__) /* MCST Elbrus 2000*/
void ottd_cpuid(int info[4], int type)
{
info[0] = info[1] = info[2] = info[3] = 0;
if (type == 0) {
info[0] = 1;
} else if (type == 1) {
#if defined(__SSE4_1__)
info[2] |= (1<<19); /* HasCPUIDFlag(1, 2, 19) */
#endif
#if defined(__SSSE3__)
info[2] |= (1<<9); /* HasCPUIDFlag(1, 2, 9) */
#endif
#if defined(__SSE2__)
info[3] |= (1<<26); /* HasCPUIDFlag(1, 3, 26) */
#endif
}
}
#else
void ottd_cpuid(int info[4], int type)
{
Expand Down