cosmopolitan/libc/time/clockstonanos.internal.h

#ifndef COSMOPOLITAN_LIBC_TIME_CLOCKSTONANOS_INTERNAL_H_
#define COSMOPOLITAN_LIBC_TIME_CLOCKSTONANOS_INTERNAL_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_

static inline uint64_t ClocksToNanos(uint64_t x, uint64_t y) {
  // approximation of round(x*.323018) which is usually
  // the ratio between inva rdtsc ticks and nanoseconds
  uint128_t difference = x - y;
  return (difference * 338709) >> 20;
}

COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_TIME_CLOCKSTONANOS_INTERNAL_H_ */
Improve locks and signals - Introduce fast spinlock API - Double rand64() perf w/ spinlock - Improve raise() on New Technology - Support gettid() across platforms - Implement SA_NODEFER on New Technology - Move the lock intrinsics into LIBC_INTRIN - Make SIGTRAP recoverable on New Technology - Block SIGCHLD in wait4() on New Technology - Add threading prototypes for XNU and FreeBSD - Rewrite abort() fixing its minor bugs on XNU/NT - Shave down a lot of the content in libc/bits/bits.h - Let signal handlers modify CPU registers on New Technology 2022-04-12 12:20:17 +00:00			`#ifndef COSMOPOLITAN_LIBC_TIME_CLOCKSTONANOS_INTERNAL_H_`
			`#define COSMOPOLITAN_LIBC_TIME_CLOCKSTONANOS_INTERNAL_H_`
Add LISP interpreter 2022-04-08 03:30:22 +00:00			`#if !(__ASSEMBLER__ + __LINKER__ + 0)`
			`COSMOPOLITAN_C_START_`

			`static inline uint64_t ClocksToNanos(uint64_t x, uint64_t y) {`
			`// approximation of round(x*.323018) which is usually`
			`// the ratio between inva rdtsc ticks and nanoseconds`
			`uint128_t difference = x - y;`
			`return (difference * 338709) >> 20;`
			`}`

			`COSMOPOLITAN_C_END_`
			`#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */`
Improve locks and signals - Introduce fast spinlock API - Double rand64() perf w/ spinlock - Improve raise() on New Technology - Support gettid() across platforms - Implement SA_NODEFER on New Technology - Move the lock intrinsics into LIBC_INTRIN - Make SIGTRAP recoverable on New Technology - Block SIGCHLD in wait4() on New Technology - Add threading prototypes for XNU and FreeBSD - Rewrite abort() fixing its minor bugs on XNU/NT - Shave down a lot of the content in libc/bits/bits.h - Let signal handlers modify CPU registers on New Technology 2022-04-12 12:20:17 +00:00			`#endif /* COSMOPOLITAN_LIBC_TIME_CLOCKSTONANOS_INTERNAL_H_ */`