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ppcexec: Improve realtime.

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joevt 2024-03-25 16:48:57 -07:00 committed by dingusdev
parent 382246905b
commit 5022ac89b4
1 changed files with 25 additions and 3 deletions
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28
cpu/ppc/ppcexec.cpp
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@ -33,6 +33,22 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#include <stdio.h>
#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;
}
#endif
using namespace std;
using namespace dppc_interpreter;
@ -65,7 +81,7 @@ bool dec_exception_pending = false;
uint32_t glob_bb_start_la;
/* variables related to virtual time */
bool g_realtime;
const bool g_realtime = false;
uint64_t g_nanoseconds_base;
uint64_t g_icycles_base;
uint64_t g_icycles;
@ -277,9 +293,13 @@ void ppc_main_opcode()
OpcodeGrabber[(ppc_cur_instruction >> 26) & 0x3F]();
}
static long long now_ns() {
long long now_ns() {
#ifdef __APPLE__
return ConvertHostTimeToNanos2(mach_absolute_time());
#else
return std::chrono::duration_cast<std::chrono::nanoseconds>(
std::chrono::high_resolution_clock::now().time_since_epoch()).count();
#endif
}
uint64_t get_virt_time_ns()
@ -841,7 +861,9 @@ void ppc_cpu_init(MemCtrlBase* mem_ctrl, uint32_t cpu_version, bool include_601,
TimerManager::get_instance()->set_notify_changes_cb(&force_cycle_counter_reload);
// initialize time base facility
g_realtime = false;
#ifdef __APPLE__
mach_timebase_info(&timebase_info);
#endif
g_nanoseconds_base = now_ns();
g_icycles_base = 0;
g_icycles = 0;