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factor: fix comments

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-04-10 00:41:11 +02:00
parent bef1713217
commit 12dc4fbf18
1 changed files with 2 additions and 2 deletions
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4
coreutils/factor.c
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@ -54,7 +54,7 @@ static inline half_t isqrt(wide_t N)
// if (N == 0) // if (N == 0)
// return 0; // return 0;
/* First approximation x > sqrt(N) - half as many bits: /* First approximation of x+1 > sqrt(N) - all-ones, half as many bits:
* 1xxxxx -> 111 (six bits to three) * 1xxxxx -> 111 (six bits to three)
* 01xxxx -> 111 * 01xxxx -> 111
* 001xxx -> 011 * 001xxx -> 011
@ -125,7 +125,7 @@ static NOINLINE void factorize(wide_t N)
if (factor >= max_factor) if (factor >= max_factor)
break; break;
factor += 2; factor += 2;
/* Rudimentary wheel sieving: skip multiples of 3: /* Rudimentary wheel sieving: skip multiples of 3, 5 and 7:
* Every third odd number is divisible by three and thus isn't a prime: * Every third odd number is divisible by three and thus isn't a prime:
* 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47... * 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47...
* ^ ^ ^ ^ ^ ^ ^ _ ^ ^ _ ^ ^ ^ ^ * ^ ^ ^ ^ ^ ^ ^ _ ^ ^ _ ^ ^ ^ ^