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#include <dolphin/exi.h>
#include <dolphin/os.h>
#include "__os.h"
// End of each month in standard year
static int YearDays[MONTH_MAX] = {0, 31, 59, 90, 120, 151,
181, 212, 243, 273, 304, 334};
// End of each month in leap year
static int LeapYearDays[MONTH_MAX] = {0, 31, 60, 91, 121, 152,
182, 213, 244, 274, 305, 335};
#ifdef __GEKKO__
asm OSTime OSGetTime(void) {
jump:
nofralloc
mftbu r3
mftb r4
// Check for possible carry from TBL to TBU
mftbu r5
cmpw r3, r5
bne jump
blr
}
asm OSTick OSGetTick(void){
nofralloc
mftb r3
blr
}
asm static void __SetTime(OSTime time) {
nofralloc
li r5, 0
mttbl r5
mttbu r3
mttbl r4
blr
}
#endif
void __OSSetTime(OSTime time) {
BOOL enabled;
OSTime * timeAdjustAddr;
timeAdjustAddr = __OSSystemTime;
enabled = OSDisableInterrupts();
*timeAdjustAddr += OSGetTime() - time;
__SetTime(time);
EXIProbeReset();
OSRestoreInterrupts(enabled);
}
OSTime __OSGetSystemTime() {
BOOL enabled;
OSTime* timeAdjustAddr;
OSTime result;
timeAdjustAddr = __OSSystemTime;
enabled = OSDisableInterrupts();
result = OSGetTime() + *timeAdjustAddr;
OSRestoreInterrupts(enabled);
return result;
}
OSTime __OSTimeToSystemTime(OSTime time) {
BOOL enabled;
OSTime* timeAdjustAddr = __OSSystemTime;
OSTime result;
enabled = OSDisableInterrupts();
result = *timeAdjustAddr + time;
OSRestoreInterrupts(enabled);
return result;
}
#ifdef __GEKKO__
asm void __OSSetTick(__REGISTER OSTick newTicks) {
nofralloc
mttbl newTicks
blr
}
#endif
static int IsLeapYear(int year) {
return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
}
static int GetYearDays(int year, int mon) {
int* md = (IsLeapYear(year)) ? LeapYearDays : YearDays;
return md[mon];
}
static int GetLeapDays(int year) {
ASSERTLINE(286, 0 <= year);
if (year < 1) {
return 0;
}
return (year + 3) / 4 - (year - 1) / 100 + (year - 1) / 400;
}
static void GetDates(int days, OSCalendarTime* td) {
int year;
int n;
int month;
int * md;
ASSERTLINE(311, 0 <= days);
td->wday = (days + 6) % WEEK_DAY_MAX;
for (year = days / YEAR_DAY_MAX;
days < (n = year * YEAR_DAY_MAX + GetLeapDays(year)); year--) {
;
}
days -= n;
td->year = year;
td->yday = days;
md = IsLeapYear(year) ? LeapYearDays : YearDays;
for (month = MONTH_MAX; days < md[--month];) {
;
}
td->mon = month;
td->mday = days - md[month] + 1;
}
void OSTicksToCalendarTime(OSTime ticks, OSCalendarTime* td) {
int days;
int secs;
OSTime d;
d = ticks % OS_SEC_TO_TICKS(1);
if (d < 0) {
d += OS_SEC_TO_TICKS(1);
ASSERTLINE(356, 0 <= d);
}
td->usec = OS_TICKS_TO_USEC(d) % USEC_MAX;
td->msec = OS_TICKS_TO_MSEC(d) % MSEC_MAX;
ASSERTLINE(360, 0 <= td->usec);
ASSERTLINE(361, 0 <= td->msec);
ticks -= d;
ASSERTLINE(364, ticks % OSSecondsToTicks(1) == 0);
ASSERTLINE(368, 0 <= OSTicksToSeconds(ticks) / 86400 + BIAS && OSTicksToSeconds(ticks) / 86400 + BIAS <= INT_MAX);
days = (OS_TICKS_TO_SEC(ticks) / SECS_IN_DAY) + BIAS;
secs = OS_TICKS_TO_SEC(ticks) % SECS_IN_DAY;
if (secs < 0) {
days -= 1;
secs += SECS_IN_DAY;
ASSERTLINE(375, 0 <= secs);
}
GetDates(days, td);
td->hour = secs / 60 / 60;
td->min = secs / 60 % 60;
td->sec = secs % 60;
}
OSTime OSCalendarTimeToTicks(OSCalendarTime* td) {
OSTime secs;
int ov_mon;
int mon;
int year;
ov_mon = td->mon / MONTH_MAX;
mon = td->mon - (ov_mon * MONTH_MAX);
if (mon < 0) {
mon += MONTH_MAX;
ov_mon--;
}
ASSERTLINE(412, (ov_mon <= 0 && 0 <= td->year + ov_mon) || (0 < ov_mon && td->year <= INT_MAX - ov_mon));
year = td->year + ov_mon;
secs = (OSTime)SECS_IN_YEAR * year +
(OSTime)SECS_IN_DAY * (GetLeapDays(year) + GetYearDays(year, mon) + td->mday - 1) +
(OSTime)SECS_IN_HOUR * td->hour +
(OSTime)SECS_IN_MIN * td->min +
td->sec -
(OSTime)0xEB1E1BF80ULL;
return OS_SEC_TO_TICKS(secs) + OS_MSEC_TO_TICKS((OSTime)td->msec) +
OS_USEC_TO_TICKS((OSTime)td->usec);
}
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