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Another random number generator update

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5406 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2012-12-01 18:44:57 +00:00
parent 131684fb54
commit 65548d2ae0
2 changed files with 5 additions and 5 deletions
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libc/stdlib/lib_rand.c
+4 -4
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@@ -175,13 +175,13 @@ static inline void fgenerate2(void)
unsigned long randint;
/* Second order congruential generator. One may be added to the result of the
* generated value to avoid the value zero (I am not sure if this is necessor
* generated value to avoid the value zero (I am not sure if this is necessary
* for higher order random number generators or how this may effect the quality
* of the generated numbers).
*/
randint = (RND2_CONSTK1 * g_randint1 +
RND2_CONSTK2 * g_randint2) % RND2_CONSTP + 1;
RND2_CONSTK2 * g_randint2) % RND2_CONSTP;
g_randint2 = g_randint1;
g_randint1 = (randint == 0 ? 1 : randint);
@@ -208,14 +208,14 @@ static inline void fgenerate3(void)
unsigned long randint;
/* Third order congruential generator. One may be added to the result of the
* generated value to avoid the value zero (I am not sure if this is necessor
* generated value to avoid the value zero (I am not sure if this is necessary
* for higher order random number generators or how this may effect the quality
* of the generated numbers).
*/
randint = (RND3_CONSTK1 * g_randint1 +
RND3_CONSTK2 * g_randint2 +
RND3_CONSTK2 * g_randint3) % RND3_CONSTP + 1;
RND3_CONSTK2 * g_randint3) % RND3_CONSTP;
g_randint3 = g_randint2;
g_randint2 = g_randint1;