diff options
| -rw-r--r-- | firmware/common/random.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/firmware/common/random.c b/firmware/common/random.c index 1e65eef..5471534 100644 --- a/firmware/common/random.c +++ b/firmware/common/random.c @@ -142,12 +142,16 @@ int rand(void) { int y; - if(--left < 0) - return rand_reload(); - - y = *next++; - y ^= (y >> 11); - y ^= (y << 7) & 0x9D2C5680U; - y ^= (y << 15) & 0xEFC60000U; - return (y ^ (y >> 18)) & ((2^31)-1); /* 31-bit limit by Björn Stenberg*/ + if(--left < 0) { + y = rand_reload(); + } + else { + y = *next++; + y ^= (y >> 11); + y ^= (y << 7) & 0x9D2C5680U; + y ^= (y << 15) & 0xEFC60000U; + y ^= (y >> 18); + } + + return y & 0x7fffffff; /* 31-bit limit by Björn Stenberg*/ } |