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…sterdam (Glamsterdam EL) schedule
….py: parse Amsterdam block header (blockAccessListHash, slotNumber); discard receipts/blockAccessList fixture keys in the harness
…v7.2.0 from ethereum/execution-specs
… max 21 / fraction 11684671) AMSTERDAM inherited the Osaka/Prague blob parameters (target 6 / max 9 / fraction 5007716). EELS amsterdam vm/gas.py has BLOB_SCHEDULE_TARGET = 14 and BLOB_SCHEDULE_MAX = 21 (at PER_BLOB = 2^17: Gtargetblobgas = 1835008, Gmaxblobgas = 2752512) and BLOB_BASE_FEE_UPDATE_FRACTION = 11684671, matching the mainnet BPO2 blob schedule (EIP-8135 / EIP-7892) that Amsterdam starts from. Raising Gmaxblobgas from 9 to 21 blobs exposes the pre-existing missing EIP-7594 per-tx blob limit (EELS BLOB_COUNT_LIMIT = 6, fork.py:150): the blob_count_21 sub-case of invalid_max_blobs_per_tx was previously rejected by the too-small inherited block max instead of the per-tx check. Mask it in failing.llvm next to its already-masked blob_count_7/8 siblings until the per-tx limit is implemented. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
read_csv_file crashed test collection with IndexError on any blank line in failing.llvm/slow.llvm — which the fixtures-failing-list Makefile target itself can produce via its sort/sed post-processing. Skip empty rows.
# Conflicts: # kevm-pyk/src/kevm_pyk/kproj/evm-semantics/driver.md
Add the three backward-compatible stack opcodes (EIP-8024): DUPN (0xe6), SWAPN (0xe7), EXCHANGE (0xe8), each with a 1-byte immediate and Gverylow (3) cost, gated on the new Ghaseip8024 flag (true at AMSTERDAM). Modeled as StackOps that read and decode their immediate from <program> at exec time (like PUSH): decode_single ((x+145)%256, valid x in [0,90]u[128,255]) for DUPN/SWAPN, decode_pair (k=x^143; divmod(k,16)) for EXCHANGE. DUPN(n)/SWAPN(n) reuse the DUP/SWAP stack logic; EXCHANGE swaps two arbitrary positions. Out-of-range immediates halt EVMC_INVALID_INSTRUCTION, insufficient depth halts EVMC_STACK_UNDERFLOW; #widthOp is 2 (pc advances past the immediate). Jumpdest analysis (#widthOpCode) is intentionally left unchanged: EIP-8024's immediates are constrained to never be a JUMPDEST or PUSH byte, so scanning the immediate as an ordinary opcode keeps old jumpdest analysis valid (the backward-compatibility property; confirmed by the jump_to_immediate_byte fixtures). Unmask all 53 eip8024 fixtures. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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September 8, 2026 11:52
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Implements EIP-8024: immediate-operand stack manipulation opcodes for legacy EVM.
evm.md:DUPN/SWAPN/EXCHANGEwith one-byte immediates;schedule.md:Ghaseip8024+ gas.Added helpers based on the EIP's reference functions:
#immByte(PGM, PC)reads the operand like PUSH does (#range, total, zero-padding at end-of-code),#decodeSingleis the EIP'sdecode_single((x+145) mod 256, mapping the valid bytes onto the contiguous depth range17..235),#decodePairA/#decodePairBare the two components ofdecode_pair(the pair is exposed as two projections; each dispatches to an arity-2 overload on the nibbles ofx^0x8F, with complementaryQ <Int R/Q >=Int Rrequires clauses).#validSingle/#validPairimplement the EIP's valid-immediate byte ranges; invalid immediates halt withEVMC_INVALID_INSTRUCTION, insufficient depth withEVMC_STACK_UNDERFLOW.Jumpdest analysis is intentionally unchanged: valid immediates can never be a
JUMPDESTorPUSHbyte, which is the EIP's backward-compatibility property.