mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-06-06 06:03:23 +00:00
Code Activity

Added memhasher (yosys -M)

Browse source
This commit is contained in:
Clifford Wolf 2014-12-28 21:27:51 +01:00
parent 445686cba3
commit 8773fd5897
4 changed files with 56 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

37
kernel/yosys.cc
View file

@ -55,6 +55,43 @@ RTLIL::Design *yosys_design = NULL;
Tcl_Interp *yosys_tcl_interp = NULL;
#endif
bool memhasher_active = false;
uint32_t memhasher_rng;
std::vector<void*> memhasher_store;
void memhasher_on()
{
memhasher_rng += time(NULL) << 16 ^ getpid();
memhasher_store.resize(0x10000);
memhasher_active = true;
}
void memhasher_off()
{
for (auto p : memhasher_store)
if (p) free(p);
memhasher_store.clear();
memhasher_active = false;
}
void memhasher_do()
{
memhasher_rng ^= memhasher_rng << 13;
memhasher_rng ^= memhasher_rng >> 17;
memhasher_rng ^= memhasher_rng << 5;
int size, index = (memhasher_rng >> 4) & 0xffff;
switch (memhasher_rng & 7) {
case 0: size = 16; break;
case 1: size = 256; break;
case 2: size = 1024; break;
case 3: size = 4096; break;
default: size = 0;
}
if (index < 16) size *= 16;
memhasher_store[index] = realloc(memhasher_store[index], size);
}
std::string stringf(const char *fmt, ...)
{
std::string string;