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libui/test/lib/timerpriv.h

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Added proper 128-bit muldiv() stuff for macOS and Windows. Will actually use them next. Also fixed compiling on non-Windows.
2019-05-05 01:17:11 -05:00
// 5 may 2019
typedef struct timerprivInt128 timerprivInt128;
struct timerprivInt128 {
int neg;
uint64_t high;
uint64_t low;
};
Implemented the new MulDiv128 stuff on macOS. To make things easier in regards to signedness, this implementation also uses a base, like the Unix one, and the mach_timebase_info() conversion is done in timerMonotonicTime() instead. (Also added the admittedly-redundant-since-the-current(ish)-implementation-cannot-fail error check to mach_timebase_info().) As a result, timerTimeSub() can now be end - start on all platforms. Also found and fixed bugs in the actual muldiv128 algorithm implementation. Next up: Windows.
2019-05-05 02:17:11 -05:00
extern void timerprivMulDivInt64(int64_t x, int64_t y, int64_t z, timerprivInt128 *quot);
extern void timerprivMulDivUint64(uint64_t x, uint64_t y, uint64_t z, timerprivInt128 *quot);