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ppcexec: Use recommended Apple API for getting the realtime clock #234

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Merged
dingusdev merged 1 commit into from
Oct 9, 2026
Merged

ppcexec: Use recommended Apple API for getting the realtime clock #234

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19 changes: 2 additions & 17 deletions cpu/ppc/ppcexec.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -36,19 +36,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#include <string>

#ifdef __APPLE__
#include <mach/mach_time.h>
#undef EXC_SYSCALL
static struct mach_timebase_info timebase_info;
static uint64_t
ConvertHostTimeToNanos2(uint64_t host_time)
{
if (timebase_info.numer == timebase_info.denom)
return host_time;
long double answer = host_time;
answer *= timebase_info.numer;
answer /= timebase_info.denom;
return (uint64_t)answer;
}
#include <ctime>
#endif

using namespace std;
Expand Down Expand Up @@ -345,7 +333,7 @@ void ppc_main_opcode(PPCOpcode *opcodeGrabber, uint32_t opcode)

static long long cpu_now_ns() {
#ifdef __APPLE__
return ConvertHostTimeToNanos2(mach_absolute_time());
return clock_gettime_nsec_np(CLOCK_UPTIME_RAW);
#else
return std::chrono::duration_cast<std::chrono::nanoseconds>(
std::chrono::high_resolution_clock::now().time_since_epoch()).count();
Expand Down Expand Up @@ -1036,9 +1024,6 @@ void ppc_cpu_init(MemCtrlBase* mem_ctrl, uint32_t cpu_version, bool do_include_6
TimerManager::get_instance()->set_notify_changes_cb(&force_cycle_counter_reload);

// initialize time base facility
#ifdef __APPLE__
mach_timebase_info(&timebase_info);
#endif
g_nanoseconds_base = cpu_now_ns();
g_icycles = 0;

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