calld myret,##hub ' <-- Error - Expected a constant,unary operator or "("
Crossing from cog to hub using a 9-bit relative jump augmented to 20 bits is a brain bender. I'll need to think about this. Sorry this issue has carried on so long.
calld myret,##hub ' <-- Error - Expected a constant,unary operator or "("
Crossing from cog to hub using a 9-bit relative jump augmented to 20 bits is a brain bender. I'll need to think about this. Sorry this issue has carried on so long.
It works Ok using the D reg variant so maybe a note in the documentation saying DONT AUGment the #rel9 variant and your done.
Actually the ##rel9 issue is not isolated to just CALLD.
Most of the looping and Jump-Bit variants, you would expect to be short & relative jumps, as they are on other MCUs.
It's just the CALL variants, where usually there is a far/long version in the tools ?
CALLD is more complicated than DJNZ because there are two different instructions for it. One is like DJNZ and the other has a 20-bit immediate field, plus absolute/relative bit.
Another thing about all the DJNZ-like instructions with immediate relative addressing, those addresses step 4x in hub exec, making them only branchable to commonly-aligned addresses. Same rule using AUGS with them.
I changed the DE2-115 compile to 4 cogs and 38 smart pins (63, 62, 35..0). It's at 97% capacity now. I need to make these AUGS+RDxxxx/WRxxxx changes and then I'll do a final compile on everything.
I changed the DE2-115 compile to 4 cogs and 38 smart pins (63, 62, 35..0). It's at 97% capacity now. I need to make these AUGS+RDxxxx/WRxxxx changes and then I'll do a final compile on everything.
Wow, that's quite a jump in smartpins.
Hmm, so a 8 cog "A9" would have all 64 smartpins then?
Could be a useful additional build for testing.
It's not as many as I was hoping for. That's eight Smartpins is as big as one Cog. They're bulker than I imagined.
I found that also interesting, but imagining what they do it makes some sense. Just naming them Smartpins took away the feeling that they are independent sub-processors running parallel to the 16 COGS.
I wonder what a really fast reduced instruction set P1 Cog with 512B (128 registers) would be in size and what it could perform instead of a Smart Pin ???
IOW a tailored software cog specifically for each I/O.
I wonder what a really fast reduced instruction set P1 Cog with 512B (128 registers) would be in size and what it could perform instead of a Smart Pin ???
IOW a tailored software cog specifically for each I/O.
What's unique about those smart pins is that they can input, output, and respond on a clock-by-clock basis.
I wonder what a really fast reduced instruction set P1 Cog with 512B (128 registers) would be in size and what it could perform instead of a Smart Pin ???
IOW a tailored software cog specifically for each I/O.
What's unique about those smart pins is that they can input, output, and respond on a clock-by-clock basis.
A specialised cog might be able to run at 2x the speed of the P2 cog.
Add a serialiser/deserialiser plus the counters with extra modes.
Add some basic software instructions.
Might be smaller than current, and perhaps more flexible too.
Perhaps 1 per P2 cog and connect as OR onto the existing I/O ring.
Anyway, it's too late for this. But it's nice to think about just the same.
I wonder what a really fast reduced instruction set P1 Cog with 512B (128 registers) would be in size and what it could perform instead of a Smart Pin ???
IOW a tailored software cog specifically for each I/O.
What's unique about those smart pins is that they can input, output, and respond on a clock-by-clock basis.
A specialised cog might be able to run at 2x the speed of the P2 cog.
Add a serialiser/deserialiser plus the counters with extra modes.
Add some basic software instructions.
Might be smaller than current, and perhaps more flexible too.
Perhaps 1 per P2 cog and connect as OR onto the existing I/O ring.
Anyway, it's too late for this. But it's nice to think about just the same.
Yes, nice idea, and worth thinking about, but lets save it until the P2 is done.
No! ... no ... NO! ... Won't be faster nor smaller. "Add a serialiser/deserialiser plus the counters with extra modes." - That's basically a smartpin right there.
I may have been surprised at their size but I'm happy with how they are and the flexibility they offer. Smartpins was one area that Chip extended when the extra die space came up. And, as he mentioned above, once you add in the die space needs of CogRAM/LUTRAM (4kB of dual ported SRAM per Cog) - which is not accounted for on the FPGA image compiles - it'll rebalance the proportions better.
SRAM is bulky! Dual ported is really bad for some reason. It put CogRAM alone at nearly 70% of the Cog's 424322 um² die area. That was back when LUTRAM was still single ported. LUTRAM is now the same size as CogRAM. 292 x 2 = 584 + 45ish = 630000 um² for a current Cog.
About 45000 is the logic and flops. Which is a mere 7.1% of the Cog's die space.
So, I'm guessing around 6000 um², or 1% of a Cog, will fit a Smartpin.
No! ... no ... NO! ... Won't be faster nor smaller. "Add a serialiser/deserialiser plus the counters with extra modes." - That's basically a smartpin right there.
Getting ideas and approaches from a group of knowledgeable people is always a good idea. Technology changes rapidly so it pays to take a look around when starting any new project. Keeps it from being limited by the preconceptions and limited knowledge of what is currently possible.
Comments
calld myret,##hub ' <-- Error - Expected a constant,unary operator or "("Crossing from cog to hub using a 9-bit relative jump augmented to 20 bits is a brain bender. I'll need to think about this. Sorry this issue has carried on so long.
EEEE 1011001 CZI DDDDDDDDD SSSSSSSSS CALLD D,S/#rel9 {WC,WZ}EEEE 1011001 CZI DDDDDDDDD SSSSSSSSS CALLD D,S/#rel9 {WC,WZ} EEEE 1011010 00I DDDDDDDDD SSSSSSSSS IJZ D,S/#rel9 EEEE 1011010 01I DDDDDDDDD SSSSSSSSS IJNZ D,S/#rel9 EEEE 1011010 10I DDDDDDDDD SSSSSSSSS IJS D,S/#rel9 EEEE 1011010 11I DDDDDDDDD SSSSSSSSS IJNS D,S/#rel9 EEEE 1011011 00I DDDDDDDDD SSSSSSSSS DJZ D,S/#rel9 EEEE 1011011 01I DDDDDDDDD SSSSSSSSS DJNZ D,S/#rel9 EEEE 1011011 10I DDDDDDDDD SSSSSSSSS DJS D,S/#rel9 EEEE 1011011 11I DDDDDDDDD SSSSSSSSS DJNS D,S/#rel9 EEEE 1011100 00I DDDDDDDDD SSSSSSSSS TJZ D,S/#rel9 EEEE 1011100 01I DDDDDDDDD SSSSSSSSS TJNZ D,S/#rel9 EEEE 1011100 10I DDDDDDDDD SSSSSSSSS TJS D,S/#rel9 EEEE 1011100 11I DDDDDDDDD SSSSSSSSS TJNS D,S/#rel9 EEEE 1011101 0LI DDDDDDDDD SSSSSSSSS JP D/#,S/#rel9 EEEE 1011101 1LI DDDDDDDDD SSSSSSSSS JNP D/#,S/#rel9 EEEE 1011110 0LI DDDDDDDDD SSSSSSSSS CALLPA D/#,S/#rel9 EEEE 1011110 1LI DDDDDDDDD SSSSSSSSS CALLPB D/#,S/#rel9 EEEE 1011111 01I 000000000 SSSSSSSSS JINT S/#rel9 EEEE 1011111 01I 000000001 SSSSSSSSS JCT1 S/#rel9 EEEE 1011111 01I 000000010 SSSSSSSSS JCT2 S/#rel9 EEEE 1011111 01I 000000011 SSSSSSSSS JCT3 S/#rel9 EEEE 1011111 01I 000000100 SSSSSSSSS JSE1 S/#rel9 EEEE 1011111 01I 000000101 SSSSSSSSS JSE2 S/#rel9 EEEE 1011111 01I 000000110 SSSSSSSSS JSE3 S/#rel9 EEEE 1011111 01I 000000111 SSSSSSSSS JSE4 S/#rel9 EEEE 1011111 01I 000001000 SSSSSSSSS JPAT S/#rel9 EEEE 1011111 01I 000001001 SSSSSSSSS JFBW S/#rel9 EEEE 1011111 01I 000001010 SSSSSSSSS JXMT S/#rel9 EEEE 1011111 01I 000001011 SSSSSSSSS JXFI S/#rel9 EEEE 1011111 01I 000001100 SSSSSSSSS JXRO S/#rel9 EEEE 1011111 01I 000001101 SSSSSSSSS JXRL S/#rel9 EEEE 1011111 01I 000001110 SSSSSSSSS JATN S/#rel9 EEEE 1011111 01I 000001111 SSSSSSSSS JQMT S/#rel9 EEEE 1011111 01I 000010000 SSSSSSSSS JNINT S/#rel9 EEEE 1011111 01I 000010001 SSSSSSSSS JNCT1 S/#rel9 EEEE 1011111 01I 000010010 SSSSSSSSS JNCT2 S/#rel9 EEEE 1011111 01I 000010011 SSSSSSSSS JNCT3 S/#rel9 EEEE 1011111 01I 000010100 SSSSSSSSS JNSE1 S/#rel9 EEEE 1011111 01I 000010101 SSSSSSSSS JNSE2 S/#rel9 EEEE 1011111 01I 000010110 SSSSSSSSS JNSE3 S/#rel9 EEEE 1011111 01I 000010111 SSSSSSSSS JNSE4 S/#rel9 EEEE 1011111 01I 000011000 SSSSSSSSS JNPAT S/#rel9 EEEE 1011111 01I 000011001 SSSSSSSSS JNFBW S/#rel9 EEEE 1011111 01I 000011010 SSSSSSSSS JNXMT S/#rel9 EEEE 1011111 01I 000011011 SSSSSSSSS JNXFI S/#rel9 EEEE 1011111 01I 000011100 SSSSSSSSS JNXRO S/#rel9 EEEE 1011111 01I 000011101 SSSSSSSSS JNXRL S/#rel9 EEEE 1011111 01I 000011110 SSSSSSSSS JNATN S/#rel9 EEEE 1011111 01I 000011111 SSSSSSSSS JNQMT S/#rel9It's just the CALL variants, where usually there is a far/long version in the tools ?
Any chance when you compile V18 for DE2-115 of dropping a cog(s) to get some smartpins back.
This also brings back DAC3(red).
Another thing about all the DJNZ-like instructions with immediate relative addressing, those addresses step 4x in hub exec, making them only branchable to commonly-aligned addresses. Same rule using AUGS with them.
The next step down from 8 cogs is 4 cogs.
I'm not sure what you mean about DAC3. Is pin 3 currently not a smart pin? I'm only on my phone at the moment.
As soon as compilation finishes for the BeMicro-A9 board, we'll find out.
DE2-115 has only 5 smartpins. 63,62,2..0
Hmm, so a 8 cog "A9" would have all 64 smartpins then?
Could be a useful additional build for testing.
Logic wise, but they don't have RAMs.
I found that also interesting, but imagining what they do it makes some sense. Just naming them Smartpins took away the feeling that they are independent sub-processors running parallel to the 16 COGS.
Interesting times are coming.
Mike
I wonder what a really fast reduced instruction set P1 Cog with 512B (128 registers) would be in size and what it could perform instead of a Smart Pin ???
IOW a tailored software cog specifically for each I/O.
What's unique about those smart pins is that they can input, output, and respond on a clock-by-clock basis.
Add a serialiser/deserialiser plus the counters with extra modes.
Add some basic software instructions.
Might be smaller than current, and perhaps more flexible too.
Perhaps 1 per P2 cog and connect as OR onto the existing I/O ring.
Anyway, it's too late for this. But it's nice to think about just the same.
Yes, nice idea, and worth thinking about, but lets save it until the P2 is done.
SRAM is bulky! Dual ported is really bad for some reason. It put CogRAM alone at nearly 70% of the Cog's 424322 um² die area. That was back when LUTRAM was still single ported. LUTRAM is now the same size as CogRAM. 292 x 2 = 584 + 45ish = 630000 um² for a current Cog.
About 45000 is the logic and flops. Which is a mere 7.1% of the Cog's die space.
So, I'm guessing around 6000 um², or 1% of a Cog, will fit a Smartpin.
Getting ideas and approaches from a group of knowledgeable people is always a good idea. Technology changes rapidly so it pays to take a look around when starting any new project. Keeps it from being limited by the preconceptions and limited knowledge of what is currently possible.
In part a thank you, but also a caution. With rapid changes in technology an impractical idea today may be a great one tomorrow.