diff options
| author | Björn Stenberg <bjorn@haxx.se> | 2002-07-18 00:03:47 +0000 |
|---|---|---|
| committer | Björn Stenberg <bjorn@haxx.se> | 2002-07-18 00:03:47 +0000 |
| commit | 25e92bd967ce404ebe9bf8e6ff7b6b9f5f32e8f9 (patch) | |
| tree | 58059d6f5d8bf7134d86dddf629f36f512fb992a /firmware/common | |
| parent | 3a62b56740856226e6debf6c2f7a6cdb0435db80 (diff) | |
| download | rockbox-25e92bd967ce404ebe9bf8e6ff7b6b9f5f32e8f9.zip rockbox-25e92bd967ce404ebe9bf8e6ff7b6b9f5f32e8f9.tar.gz rockbox-25e92bd967ce404ebe9bf8e6ff7b6b9f5f32e8f9.tar.bz2 rockbox-25e92bd967ce404ebe9bf8e6ff7b6b9f5f32e8f9.tar.xz | |
Vastly improved, now working, random! :)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1379 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/common')
| -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*/ } |