| Rev |
Log message |
Author |
Age |
Path |
| 34 |
Implemented load and store instructions (`mov reg, [reg]` and `mov [reg], reg` respectively) |
earlz |
4384d 20h |
/tinycpu/ |
| 33 |
Added more test cases for push/pop. More are still needed though
Fixed SP increment/decrementing
Added new opcode `mov reg,reg` so debugging isn't such a pain |
earlz |
4384d 23h |
/tinycpu/ |
| 32 |
Finished up changes needed to make memory reading actually work.
Push and Pop now work |
earlz |
4385d 00h |
/tinycpu/ |
| 31 |
Removed the infamous TRData latch from ALU. Now synthesizes (sorta) warning free. No latches are used. |
earlz |
4385d 20h |
/tinycpu/ |
| 30 |
After a long weekend of thinking how to do this.. I've decided instead to not strive for a single-cycle computer.
Now, instead, ALU operations will be 2 cycle along with memory operations, and data movement operations are still 1 cycle |
earlz |
4385d 20h |
/tinycpu/ |
| 29 |
Well, added a testcase for testing the ALU bitwise operations and found a very large problem.
I'm pretty sure that the decoder needs to be partially unclocked because it essentially makes the ALU clocked how it is now, which is very bad. |
earlz |
4389d 03h |
/tinycpu/ |
| 28 |
Ok now registerfile is correct. Only using rising_edge. Now DataOut is the same as DataIn when WriteEnable is asserted.
Some of my tests had to be changed because I was expecting the DataOut to be updated 1 clock cycle after the instruction rather than on the same clock cycle.
Now it's truly single-cycle and without all the weird regIn stuff on the carryovers |
earlz |
4389d 22h |
/tinycpu/ |
| 27 |
Added a few ALU opcodes and came across a weird propogation delay issue with my registerfile.
As a workaround, I'm trying to use falling_edge instead of rising_edge. We shall see if I regret this later |
earlz |
4390d 04h |
/tinycpu/ |
| 26 |
Added extra check to make sure fetcher works properly after memory write |
earlz |
4390d 05h |
/tinycpu/ |
| 25 |
Wait for memory state now works as expected, and opcode `mov [reg], immd` works now |
earlz |
4390d 09h |
/tinycpu/ |
| 24 |
Good news, mov to IP actually works as expected! |
earlz |
4391d 02h |
/tinycpu/ |
| 23 |
Added top module for testing how our memory and cpu will work together. (hint: success)
Messing around with a small timing issue in core |
earlz |
4391d 03h |
/tinycpu/ |
| 22 |
Added to process sensitivity list to avoid warning and added ELSE for IR so it doesn't generate a latch |
earlz |
4391d 18h |
/tinycpu/ |
| 21 |
The core_tb testbench finally passes. It probably doesn't synthesize, or even pass other testbenches, but it passes that one damn it. |
earlz |
4391d 19h |
/tinycpu/ |
| 20 |
fuck it. All sorts of broken, will try to fix it tomorrow |
earlz |
4392d 18h |
/tinycpu/ |
| 19 |
Got beginning of core/decoder for the CPU |
earlz |
4392d 20h |
/tinycpu/ |
| 18 |
Finished memory controller |
earlz |
4396d 06h |
/tinycpu/ |
| 17 |
Added fetch component for fetching from memory to instruction register
Added additional testing for carryover to make sure it's correct |
earlz |
4396d 19h |
/tinycpu/ |
| 16 |
Renamed incdec to carryover (see design for why).
carryover should be done, though may change the "straight through on disable" behavior to instead leaving it floating depending on how things go later with coding. |
earlz |
4399d 22h |
/tinycpu/ |
| 15 |
Added README, LICENSE, and the (so far not created) incdec component |
earlz |
4401d 19h |
/tinycpu/ |
