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[/] [tinycpu/] [trunk/] [testbench/] [core_tb.vhd] - Rev 37

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34 Implemented load and store instructions (`mov reg, [reg]` and `mov [reg], reg` respectively) earlz 4553d 08h /tinycpu/trunk/testbench/core_tb.vhd
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 4553d 11h /tinycpu/trunk/testbench/core_tb.vhd
32 Finished up changes needed to make memory reading actually work.
Push and Pop now work
earlz 4553d 12h /tinycpu/trunk/testbench/core_tb.vhd
31 Removed the infamous TRData latch from ALU. Now synthesizes (sorta) warning free. No latches are used. earlz 4554d 08h /tinycpu/trunk/testbench/core_tb.vhd
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 4554d 08h /tinycpu/trunk/testbench/core_tb.vhd
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 4557d 15h /tinycpu/trunk/testbench/core_tb.vhd
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 4558d 10h /tinycpu/trunk/testbench/core_tb.vhd
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 4558d 16h /tinycpu/trunk/testbench/core_tb.vhd
26 Added extra check to make sure fetcher works properly after memory write earlz 4558d 17h /tinycpu/trunk/testbench/core_tb.vhd
25 Wait for memory state now works as expected, and opcode `mov [reg], immd` works now earlz 4558d 21h /tinycpu/trunk/testbench/core_tb.vhd
24 Good news, mov to IP actually works as expected! earlz 4559d 14h /tinycpu/trunk/testbench/core_tb.vhd
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 4560d 07h /tinycpu/trunk/testbench/core_tb.vhd
20 fuck it. All sorts of broken, will try to fix it tomorrow earlz 4561d 07h /tinycpu/trunk/testbench/core_tb.vhd
19 Got beginning of core/decoder for the CPU earlz 4561d 08h /tinycpu/trunk/testbench/core_tb.vhd

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