mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-07-29 15:37:59 +00:00
Code Activity

driver: add --hash-seed

Browse source
This commit is contained in:
Emil J. Tywoniak 2024-10-01 16:02:41 +02:00
parent d071489ab1
commit 953508f6d2
5 changed files with 21 additions and 35 deletions
Download patch file Download diff file Expand all files Collapse all files

9
kernel/hashlib.h
View file

@ -81,13 +81,20 @@ class Hasher {
// traditionally 5381 is used as starting value for the djb2 hash
state = 5381;
}
static void set_fudge(uint32_t f) {
fudge = f;
}
private:
uint32_t state;
static uint32_t fudge;
// The XOR version of DJB2
[[nodiscard]]
static uint32_t mkhash(uint32_t a, uint32_t b) {
return ((a << 5) + a) ^ b;
uint32_t hash = ((a << 5) + a) ^ b;
if (fudge)
hash = fudge ^ mkhash_xorshift(hash);
return hash;
}
public:
void hash32(uint32_t i) {