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sys/random/minstd: fix signedness

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This commit is contained in:
PeterKietzmann 2020-04-30 17:46:42 +02:00
parent 8136edca95
commit 090efc10de
1 changed files with 4 additions and 4 deletions
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8
sys/random/minstd.c
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@ -39,13 +39,13 @@
static uint32_t _seed = 1;
int rand_minstd(void)
int32_t rand_minstd(void)
{
uint32_t hi = div_u32_by_44488(_seed);
uint32_t lo = div_u32_mod_44488(_seed);
uint32_t test = (a * lo) - (r * hi);
int32_t test = (a * lo) - (r * hi);
if(test > 0) {
if (test > 0) {
_seed = test;
}
else {
@ -61,7 +61,7 @@ uint32_t random_uint32(void)
* so run it two times to get 32bits */
uint16_t A = (rand_minstd() >> 15);
uint16_t B = (rand_minstd() >> 15);
return (((uint32_t)A) << 16) | B;
return (((uint32_t)A) << 16) | B;
}
void random_init(uint32_t val)