matthew1kalasky3
/
microwatt
forked from cores/microwatt
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
454 Commits
31 Branches
0 Tags
65 MiB
master
fpu-init
loadstore-init
core_debug-init
icache-unused-sig
icache-insn-u-state
dcache-unused-sig
unused-sig
divider-init
loadstore-pmu-init
icache-pmu-events
fpu-typo
less-fpga-init
caravel-mpw6-20220530
caravel-mpw5-20220323
caravel-mpw5-20220322
alt-reset-address
log2ceil-issue
fpu-constant
asic-3
boxarty-20211011
icbi-issue
orange-crab-freq
dcache-nc-fix
remove-potato-uart
cache-tlb-parameters-2
caravel-20210114
caravel-20210105
jtag-port-2
jtag-port
nia-debug
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from 'afbb99cfd4'
${ noResults }
Commit Graph

2 Commits (afbb99cfd4df542092778d7abed8a91797f514f6)

Author SHA1 Message Date
Paul Mackerras e08ca4ab8e countzero: Add a register to help make timing 
This adds a register in the middle of the countzero computation,
so that we now have two cycles to count leading or trailing zeroes
instead of just one.  Execute1 now outputs a one-cycle stall signal
when it encounters a cntlz* or cnttz* instruction.  With this,
the countzero path no longer fails timing on the Artix-7 at 100MHz.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
 5 years ago
Paul Mackerras 4396eddc31 countzero: Add a testbench 
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
 5 years ago