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Mips 001 002 #64

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fa88215
implementation of mip-001
theo25 May 21, 2025
bcf5626
implementation for mip-002
theo25 Jun 3, 2025
f4a545d
Fixing merge conflicts
Robertorosmaninho Jul 15, 2025
674777c
Enabling PRAGUE
Robertorosmaninho Jul 31, 2025
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40 changes: 36 additions & 4 deletions kevm-pyk/src/kevm_pyk/kproj/evm-semantics/evm.md
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,7 @@ In the comments next to each cell, we've marked which component of the YellowPap
<pc> 0p256 </pc> // \mu_pc
<gas> $GAS:Gas </gas> // \mau_g
<memoryUsed> 0 </memoryUsed> // \mu_i
<logUsed> 0 </logUsed>
<callGas> 0:Gas </callGas>

<static> $STATIC:Bool </static>
Expand Down Expand Up @@ -1841,6 +1842,7 @@ Overall Gas
// ------------------------------------------------------
rule <k> #gas [ OP , AOP ]
=> #memory [ OP , AOP ]
~> #log [ OP , AOP ]
~> #gas [ AOP ]
~> #access [ OP , AOP, #isAccess(ACCT, AOP) ]
...
Expand All @@ -1854,15 +1856,26 @@ Overall Gas
<memoryUsed> MU </memoryUsed>
requires #usesMemory(OP)

rule <k> #memory [ _ , _ ] => .K ... </k> [owise]
rule <k> #memory [ _ , _ ] => .K ... </k> [owise]

syntax InternalOp ::= "#gas" "[" OpCode "]" | "#deductGas" | "#deductMemoryGas"
rule <k> #log [ OP , AOP ] => #log(AOP, LU) ~> #deductLog ... </k>
<logUsed> LU </logUsed>
requires #usesLog(OP)

rule <k> #log [ _ , _ ] => .K ... </k> [owise]

syntax InternalOp ::= "#gas" "[" OpCode "]" | "#deductGas" | "#deductMemoryGas" | "#deductLogGas"
| "#memory" "[" OpCode "," OpCode "]" | "#deductMemory"
// ---------------------------------------------------------------------------
| "#log" "[" OpCode "," OpCode "]" | "#deductLog"
// ---------------------------------------------------------------------------------------------------
rule <k> MU':Int ~> #deductMemory => (Cmem(SCHED, MU') -Int Cmem(SCHED, MU)) ~> #deductMemoryGas ... </k>
<memoryUsed> MU => MU' </memoryUsed> <schedule> SCHED </schedule>

rule <k> LU':Int ~> #deductLog => (Clog(SCHED, LU') -Int Clog(SCHED, LU)) ~> #deductLogGas ... </k>
<logUsed> LU => LU' </logUsed> <schedule> SCHED </schedule>

rule <k> _G:Gas ~> (#deductMemoryGas => #deductGas) ... </k> //Required for verification
rule <k> _G:Gas ~> (#deductLogGas => #deductGas) ... </k> //Required for verification
rule <k> G:Gas ~> #deductGas => #end EVMC_OUT_OF_GAS ... </k> <gas> GAVAIL </gas> requires GAVAIL <Gas G
rule <k> G:Gas ~> #deductGas => .K ... </k> <gas> GAVAIL => GAVAIL -Gas G </gas> requires G <=Gas GAVAIL

Expand Down Expand Up @@ -1941,6 +1954,25 @@ In the YellowPaper, each opcode is defined to consume zero gas unless specified
rule #memoryUsageUpdate(MU, START, WIDTH) => maxInt(MU, (START +Int WIDTH) up/Int 32) requires 0 <Int WIDTH [concrete]
```

Total Log Size
------------------

The total size of logs written is tracked to determine the appropriate amount of gas to charge for each log operation.

- `#log` computes the new total log size given the old size and next operator (with its arguments).

```k
syntax Int ::= #log ( OpCode , Int ) [symbol(#log), function, total]
// --------------------------------------------------------------------
rule #log ( LOG(_) _ WIDTH , LU ) => LU +Int MInt2Unsigned(WIDTH) requires 0 <Int MInt2Unsigned(WIDTH)
rule #log ( _ , LU ) => LU [owise]

syntax Bool ::= #usesLog ( OpCode ) [symbol(#usesLog), function, total]
// -----------------------------------------------------------------------
rule #usesLog(_:LogOp) => true
rule #usesLog(_) => false [owise]
```

Access List Gas
---------------

Expand Down Expand Up @@ -2019,7 +2051,7 @@ The intrinsic gas calculation mirrors the style of the YellowPaper (appendix H).
rule <k> #gasExec(SCHED, CODECOPY _ _ WIDTH) => Gverylow < SCHED > +Int (Gcopy < SCHED > *Int (MInt2Unsigned(WIDTH) up/Int 32)) ... </k>
rule <k> #gasExec(SCHED, MCOPY _ _ WIDTH) => Gverylow < SCHED > +Int (Gcopy < SCHED > *Int (MInt2Unsigned(WIDTH) up/Int 32)) ... </k>

rule <k> #gasExec(SCHED, LOG(N) _ WIDTH) => (Glog < SCHED > +Int (Glogdata < SCHED > *Int MInt2Unsigned(WIDTH)) +Int (N *Int Glogtopic < SCHED >)) ... </k>
rule <k> #gasExec(SCHED, LOG(N) _ _) => (Glog < SCHED > +Int (N *Int Glogtopic < SCHED >)) ... </k>

syntax Exp ::= #handleCallGas(Schedule, acctNonExistent: BExp, cap: Gas, avail: Gas, value: Int, acct:Int, AccountInfo) [strict(2)]
// ------------------------------------------------------------------------------------------------------------------------------------
Expand Down
8 changes: 8 additions & 0 deletions kevm-pyk/src/kevm_pyk/kproj/evm-semantics/gas.md
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Expand Up @@ -112,6 +112,7 @@ module GAS-FEES
| Cnew ( Schedule , Bool , Int ) [symbol(Cnew), function, total, smtlib(gas_Cnew) ]
| Cxfer ( Schedule , Int ) [symbol(Cxfer), function, total, smtlib(gas_Cxfer) ]
| Cmem ( Schedule , Int ) [symbol(Cmem), function, total, smtlib(gas_Cmem), memo ]
| Clog ( Schedule , Int ) [symbol(Clog), function, total, smtlib(gas_Clog), memo ]
| Caddraccess ( Schedule , Bool ) [symbol(Caddraccess), function, total, smtlib(gas_Caddraccess) ]
| Cstorageaccess ( Schedule , Bool ) [symbol(Cstorageaccess), function, total, smtlib(gas_Cstorageaccess) ]
| Csload ( Schedule , Bool ) [symbol(Csload), function, total, smtlib(gas_Csload) ]
Expand Down Expand Up @@ -184,6 +185,13 @@ module GAS-FEES

rule [Cmem]: Cmem(SCHED, N) => (N *Int Gmemory < SCHED >) +Int ((N *Int N) /Int Gquadcoeff < SCHED >) [concrete]

rule [Clog.short]: Clog(SCHED, N) => N *Int Glogdata < SCHED >
requires (notBool Ghasmip001 << SCHED >>) orBool (N <=Int Gloglimit < SCHED >)
[concrete]
rule [Clog.long] : Clog(SCHED, N) => (Gloglimit < SCHED > *Int Glogdata < SCHED >) +Int ((N -Int Gloglimit < SCHED >) *Int (N -Int Gloglimit < SCHED >))
requires Ghasmip001 <<SCHED >> andBool N >Int Gloglimit < SCHED >
[concrete]

rule [Cdelegationaccess]: Cdelegationaccess(SCHED, ISDELEGATION, ISWARM) => #if ISDELEGATION #then Caddraccess(SCHED, ISWARM) #else 0 #fi
rule [Caddraccess]: Caddraccess(SCHED, ISWARM) => #if ISWARM #then Gwarmstorageread < SCHED > #else Gcoldaccountaccess < SCHED > #fi
rule [Cstorageaccess]: Cstorageaccess(SCHED, ISWARM) => #if ISWARM #then Gwarmstorageread < SCHED > #else Gcoldsload < SCHED > #fi
Expand Down
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