Add support for ECAL instruction
#5239
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Feb 22, 2025
## Description The ECAL opcode is supported in `fuel-vm` to extend the capabilities of the VM. Users can implement rust code to interop with the VM using the ECAL opcode. This PR introduces support for the opcode in the sway repo - such that sway assembly can be successfully compiled with the ECAL opcode. Examples of how to utilize the `ECAL` opcode can be seen here: https://github.com/FuelLabs/fuel-vm/blob/9478991db1ea8799fab47ebe1c195946a2698a7f/fuel-vm/examples/external.rs#L51 - Closes #5239 - Added an e2e test to validate compilation of ecall opcode in sway assembly. ## Checklist - [x] I have linked to any relevant issues. - [ ] I have commented my code, particularly in hard-to-understand areas. - [ ] I have updated the documentation where relevant (API docs, the reference, and the Sway book). - [ ] If my change requires substantial documentation changes, I have [requested support from the DevRel team](https://github.com/FuelLabs/devrel-requests/issues/new/choose) - [ ] I have added tests that prove my fix is effective or that my feature works. - [ ] I have added (or requested a maintainer to add) the necessary `Breaking*` or `New Feature` labels where relevant. - [ ] I have done my best to ensure that my PR adheres to [the Fuel Labs Code Review Standards](https://github.com/FuelLabs/rfcs/blob/master/text/code-standards/external-contributors.md). - [ ] I have requested a review from the relevant team or maintainers. --------- Co-authored-by: z <[email protected]>
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Add support for this instruction in asm blocks: https://specs.fuel.network/master/fuel-vm/instruction-set.html#ecal-call-external-function
Here's a usage example: https://github.com/FuelLabs/fuel-vm/blob/master/fuel-vm/examples/external.rs#L91
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