diff options
Diffstat (limited to 'firmware')
-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 1e65eefaa0..5471534e34 100644 --- a/firmware/common/random.c +++ b/firmware/common/random.c | |||
@@ -142,12 +142,16 @@ int rand(void) | |||
142 | { | 142 | { |
143 | int y; | 143 | int y; |
144 | 144 | ||
145 | if(--left < 0) | 145 | if(--left < 0) { |
146 | return rand_reload(); | 146 | y = rand_reload(); |
147 | 147 | } | |
148 | y = *next++; | 148 | else { |
149 | y ^= (y >> 11); | 149 | y = *next++; |
150 | y ^= (y << 7) & 0x9D2C5680U; | 150 | y ^= (y >> 11); |
151 | y ^= (y << 15) & 0xEFC60000U; | 151 | y ^= (y << 7) & 0x9D2C5680U; |
152 | return (y ^ (y >> 18)) & ((2^31)-1); /* 31-bit limit by Björn Stenberg*/ | 152 | y ^= (y << 15) & 0xEFC60000U; |
153 | y ^= (y >> 18); | ||
154 | } | ||
155 | |||
156 | return y & 0x7fffffff; /* 31-bit limit by Björn Stenberg*/ | ||
153 | } | 157 | } |