added huff support

README.md

@@ -1,6 +1,6 @@
 # e=vm²
 
-*e=vm²* (pronounced *evm-squared; the = is silent), also spelled *evm2*, is an evm that runs inside evm.
+*e=vm²* (pronounced *evm-squared*; the = is silent), also spelled *evm2*, is an evm that runs inside evm.
 
 ## Yo dawg I heard you like building
 
@@ -24,6 +24,34 @@ Use `evm run` or the provided helper script:
 
 `./disas.sh` will compile *evm2* and then show disassembly so, you can like, do things that help stuff.
 
+# TBD
+
+Not yet implemented:
+- CALLDATASIIZE
+- CALLDATACOPY
+- CODESIZE
+- KECCAK256
+- JUMP, JUMPI - IMPORTANT I KNOW... will fix asap
+- SELFDESTRUCT - currently implemented as STOP... (probably should not be implemented at all)
+- CREATE, CREATE2
+
+Implemented without virtualization: (will shift all data 32 bytes)
+- REVERT
+- LOG0, LOG1, LOG2, LOG3, LOG4
+- CALL, STATICCALL, DELEGATECALL, CALLCODE
+- PC
+- RETURNDATASIZE (supposedly ok)
+- RETURNDATACOPY (supposedly ok)
+- RETURN (supposedly ok)
+- GAS (note: can implement HOSTGAS opcode in addition to virtualized GAS but is it useful?)
+- CALLDATASIIZE (this would be CODESIZE of the input code)
+
+### untested
+
+untested but presumably works:
+- CODESIZE (simply replaced to CALLDATASIZE)
+- CODECOPY (simply replaced to CALLDATACOPY)
+
 # Fun fact
 
 I used `evm` to write pure bytecode, I couldn't even use labels for jumps I had to calculate offsets!

evm.easm

@@ -1,7 +1,7 @@
-;; init memory
-push 0
-msize
-mstore
+;; init memory (pc2 at first word)
+  push 0
+  msize
+  mstore
 
 ;; start loop (offset 4)
   jumpdest
@@ -42,7 +42,7 @@ mstore
 ;; jump to opcode stub / implementation
   jump
 
-;; each stub should be exactly 4 bytes
+;; each stub should be exactly 6 bytes
 ;; usually jumpdest + opcode + no-ops
 
 ;; 00	STOP
@@ -408,34 +408,35 @@ mstore
   push 0x668
   jump
 
-;; 35 CALLDATALOAD
+;; 35 CALLDATALOAD; TODO: virtualize?
+;; (requires an additional param for calldata which is annoying but essential)
   jumpdest
   calldataload
   push 0x668
   jump
 
-;; 36 CALLDATASIIZE; TODO: fixup
+;; 36 CALLDATASIIZE; TODO: fixup?
   jumpdest
   calldatasize
   push 0x668
   jump
 
 ;; 37 CALLDATACOPY; TODO: implement...
   jumpdest
-  ;; calldatacopy ;; TODO: restore implementation.. :( will need to init with different code, or use sload or something :\
-  revert
+  ;; TODO: restore implementation.. :( will need to init with different code, or use sload or something :\
+  calldatacopy
   push 0x668
   jump
 
-;; 38 CODESIZE; TODO: jump to impl
+;; 38 CODESIZE; note this is simply implemented as CALLDATASIZE
   jumpdest
-  codesize
+  calldatasize
   push 0x668
   jump
 
-;; 39 CODECOPY; TODO: jump to CODECOPY_impl
+;; 39 CODECOPY; note this is simply implemented as CALLDATACOPY
   jumpdest
-  codecopy
+  calldatacopy
   push 0x668
   jump
 
@@ -457,13 +458,13 @@ mstore
   push 0x668
   jump
 
-;; 3D RETURNDATASIZE; TODO: jump to impl
+;; 3D RETURNDATASIZE
   jumpdest
   returndatasize
   push 0x668
   jump
 
-;; 3E RETURNDATACOPY; TODO: jump to impl
+;; 3E RETURNDATACOPY
   jumpdest
   returndatacopy
   push 0x668
@@ -591,19 +592,19 @@ mstore
   push 0x668
   jump
 
-;; 51 MLOAD
+;; 51 MLOAD (virtual)
   jumpdest
   push 0x644
   jump
   invalid
 
-;; 52 MSTORE
+;; 52 MSTORE (virtual)
   jumpdest
   push 0x64d
   jump
   invalid
 
-;; 53 MSTORE8
+;; 53 MSTORE8 (virtual)
   jumpdest
   push 0x656
   jump
@@ -633,13 +634,13 @@ mstore
   push 0x668
   jump
 
-;; 58 PC
+;; 58 PC; TODO: virtualize
   jumpdest
   pc
   push 0x668
   jump
 
-;; 59 MSIZE
+;; 59 MSIZE (virtual)
   jumpdest
   push 0x65f
   jump
@@ -1079,19 +1080,19 @@ mstore
   push 0x668
   jump
 
-;; A1 LOG1
+;; A1 LOG1; TODO: jump to impl
   jumpdest
   log1
   push 0x668
   jump
 
-;; A2 LOG2
+;; A2 LOG2; TODO: jump to impl
   jumpdest
   log2
   push 0x668
   jump
 
-;; A3 LOG3
+;; A3 LOG3; TODO: jump to impl
   jumpdest
   log3
   push 0x668
@@ -1818,7 +1819,7 @@ mstore
 
 ;; FF SELFDESTRUCT (DO NOT IMPLEMENT (or hook to prevent self-selfdestruct))
   jumpdest
-  invalid
+  stop
   invalid
   invalid
   invalid