diff options
Diffstat (limited to 'src/H5checksum.c')
| -rw-r--r-- | src/H5checksum.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/H5checksum.c b/src/H5checksum.c index 3359722..6c01508 100644 --- a/src/H5checksum.c +++ b/src/H5checksum.c @@ -270,7 +270,7 @@ This was tested for: the output delta to a Gray code (a^(a>>1)) so a string of 1's (as is commonly produced by subtraction) look like a single 1-bit difference. -* the base values were pseudorandom, all zero but one bit set, or +* the base values were pseudorandom, all zero but one bit set, or all zero plus a counter that starts at zero. Some k values for my "a-=c; a^=rot(c,k); c+=b;" arrangement that @@ -280,7 +280,7 @@ satisfy this are 14 9 3 7 17 3 Well, "9 15 3 18 27 15" didn't quite get 32 bits diffing for "differ" defined as + with a one-bit base and a two-bit delta. I -used http://burtleburtle.net/bob/hash/avalanche.html to choose +used http://burtleburtle.net/bob/hash/avalanche.html to choose the operations, constants, and arrangements of the variables. This does not achieve avalanche. There are input bits of (a,b,c) @@ -320,7 +320,7 @@ produce values of c that look totally different. This was tested for the output delta to a Gray code (a^(a>>1)) so a string of 1's (as is commonly produced by subtraction) look like a single 1-bit difference. -* the base values were pseudorandom, all zero but one bit set, or +* the base values were pseudorandom, all zero but one bit set, or all zero plus a counter that starts at zero. These constants passed: |