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ZetaR60 wants to merge 12 commits into from
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sys/div: calculate magic numbers at compile time #9280

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82ea875
sys/div: calculate magic numbers at compile time
Jun 3, 2018
5ad5cc8
cpu/mips32r2_common: sys/div API change
Jun 3, 2018
dec2f8e
tests/unittests: sys/div API change
Jun 3, 2018
141abee
sys/*: sys/div API change
Jun 3, 2018
2899deb
fixup! sys/div: calculate magic numbers at compile time
Jun 4, 2018
1129916
fixup! sys/*: sys/div API change
Jun 4, 2018
620997b
fixup! tests/unittests: sys/div API change
Jun 4, 2018
e8e3162
fixup! sys/div: calculate magic numbers at compile time
Jun 5, 2018
d69716b
fixup! cpu/mips32r2_common: sys/div API change
Jun 5, 2018
ea729a3
fixup! tests/unittests: sys/div API change
Jun 5, 2018
b1429f0
fixup! sys/*: sys/div API change
Jun 5, 2018
5a8f68d
fixup! sys/div: calculate magic numbers at compile time
Jun 7, 2018
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2 changes: 1 addition & 1 deletion cpu/mips32r2_common/periph/timer.c
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Original file line number Diff line number Diff line change
Expand Up @@ -83,7 +83,7 @@ int gettimeofday(struct timeval *__restrict __p, void *__restrict __tz)
(void)__tz;

uint64_t now = counter * US_PER_MS;
__p->tv_sec = div_u64_by_1000000(now);
__p->tv_sec = div_64(now, 1000000UL);
__p->tv_usec = now - (__p->tv_sec * US_PER_SEC);

return 0;
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8 changes: 7 additions & 1 deletion sys/evtimer/evtimer.c
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Original file line number Diff line number Diff line change
Expand Up @@ -124,8 +124,14 @@ static uint32_t _get_offset(xtimer_t *timer)
}
else {
target_us -= now_us;

/* add half of 125 so integer division rounds to nearest */
return div_u64_by_125((target_us >> 3) + 62);
target_us = (target_us >> 3) + 62;

/* a higher value would overflow the result type */
assert(target_us <= 536870911999LLU);

return (uint32_t)div_64(target_us, 125);
}
}

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