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← Back to Instruction Set: Quick Reference

INTERNALCALL

Internal function call

Opcode 0x25

internalCallStack.push({callPc: PC, returnPc: PC + instructionSize}); PC = loc

Details

Pushes current PC and return PC onto internal call stack, then jumps to the target location. While this instruction itself does not validate the jump target, an invalid target will trigger an instruction fetching error at the start of the next instruction's processing.

Gas Costs

Component Value
L2 Base 9
DA Base 0

* See Gas Metering for details on how gas costs are computed and applied.

Operands

Name Type Description
loc Memory offset Immediate bytecode offset of the function to call

Wire Formats

See Wire Format page for an explanation of wire format variants and opcode naming (e.g., why ADD_8 vs ADD_16).

INTERNALCALL (Opcode 0x25):

---
title: "INTERNALCALL"
config:
  packet:
    bitsPerRow: 40
---
packet-beta
0-7: "Opcode (0x25)"
8-39: "Operand: loc"
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