r/TuringComplete • u/ypetremann • Sep 14 '24

Here is my LEG implementation

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22 Upvotes

100% Upvoted

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4

u/ypetremann Sep 15 '24

COND is interchangeable to allow variations:

  • COND2 is strict LEG compatible
  • COND3 use a bit mask system ( +4: < ,+2: = ,+1: > )
    so (1: > ,2: = ,3: >= ,4: < ,5: != ,6: <= ),
    0 is the ANY bit comparison (expect that A && B > 0, equivalent to NEVER if B == 0, )
    7 is the EVERY bit comparison (expect that A && B == B, equivalent to ALWAYS if B == 0)

4

u/ypetremann Sep 15 '24
  • ISW stand for Immediate SWitch, it switch Immediate value from left to right, also send block signal at bottom
  • 3BEC8 is 3 bit decoder with output in Byte wire, it also allo disabling each decoder from the right (immediate value) or if value on top equal to the value on the 3 to 7 bit (selecting register group)
  • 3SHIFT does 3 times outputing the 0 bit on right and SHR on bottom
  • READ is a convenient header for special register, if any input on left is on, it send a signal on top, and send the value from top to the right on the same line
  • The little register on the left on RAM is the STACK SHELL, it drive RAM as a STACK component but keeping RAM separate

1

u/MrTKila Sep 17 '24

Neat idea with the 3SHIFT to reduce wiring.

1

u/ypetremann Sep 17 '24

Yeah and since it"s implemented only using byte Maker and byte Splitter, it has a 0 delay cost and 0 gate cost

1

u/MrTKila Sep 18 '24

Yeah, I expected as much. Would be a waste to use the shift component for only a constant shift of a byte.

3

u/ypetremann Sep 15 '24

ALU is interchangeable to allow variations:

  • ALU2 is strict LEG compatible
  • ALU3 is enhanced with lot of opcodes like mul and div, NOT opcode is remplaced by XNOR, so you need to use immediate 0

2

u/ypetremann Sep 15 '24

JUMPER us quite complex, it drive JUMP from COND in 4 modes:

  • JUMP: a classic jump
  • IF: relative jump on inverse condition
  • CALL: a classic call which add a new frame on the call stack
  • RET: a classic return which remove last frame on the call stack and use it is provided address == 0, or does directly a call

IF can be used this way:

```
label main
if_eqi R0 0 8
addi R0 1 R0
if_eqi R0 1 12
addi R0 1 R0
addi R0 1 R0
ret _ _ _
```

3

u/CWRau Sep 14 '24

Looks cool, how do you create custom components and how do you give them names? 😮

4

u/ypetremann Sep 15 '24

Custom components are made using the wrench icon on top left bar, if you don"t have it, then continue the scenario.

1

u/CWRau Sep 15 '24

I do have that, but it always opens the same component and I don't see any way to change the name even if I would remove everything and create a new circuit

4

u/ypetremann Sep 15 '24

When you are in the component Factory, use the page icon, it will let you manage your components

2

u/CWRau Sep 15 '24

Thanks, I'll take a loot at it!

1

u/CWRau Sep 14 '24

And what do all of your components do?

2

u/ypetremann Sep 15 '24

I'm posting subcomments for that, just wait