Wasmtime GitHub notifications bot (May 27 2020 at 22:09): Wasmtime GitHub notifications bot (May 27 2020 at 22:09):github-actions[bot] commented on Issue #1774:
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Wasmtime GitHub notifications bot (May 27 2020 at 22:17):bjorn3 commented on Issue #1774:
The SystemV abi on AArch64 uses
x0andx1to return pairs of integers. Could you please do that in Cranelif too? Even if only in the non baldrdash variant of the abi?
Wasmtime GitHub notifications bot (May 27 2020 at 23:50):cfallin commented on Issue #1774:
The SystemV abi on AArch64 uses
x0andx1to return pairs of integers. Could you please do that in Cranelif too? Even if only in the non baldrdash variant of the abi?Happy to take a followup patch for this, but perhaps not in the initial patch, if only because I don't have a way to test it easily. As far as I can tell, the principle in the past (e.g. in #1178) was to keep the ABI as simple as possible initially. I'm not opposed to declaring that we achieve full SysV ABI compatibility eventually, but it's a higher bar for sure!
Wasmtime GitHub notifications bot (May 28 2020 at 08:56):bjorn3 commented on Issue #1774:
Keeping the abi simple is fine, but I want to have all the primitives necessary to implement full SystemV abi support from the clif ir producer side.
Wasmtime GitHub notifications bot (May 28 2020 at 15:19):cfallin commented on Issue #1774:
@bjorn3: after more thought, I think it actually wouldn't be too bad to at least give a "all return values are in registers; error if > K returns" (K = 8 on aarch64?) mode. Perhaps we can define this to be the default if we're not in Baldrdash (SpiderMonkey) mode. This would give you the building blocks needed to legalize whatever other ABI (SysV or otherwise) down to CLIF. Does that sound reasonable?
Wasmtime GitHub notifications bot (May 28 2020 at 15:34):bjorn3 commented on Issue #1774:
:+1:
Wasmtime GitHub notifications bot (Jun 02 2020 at 00:23):cfallin commented on Issue #1774:
Updated to return values in x0-x7 by default.
@bnjbvr, PTAL -- I think we'll need to land this first before we can version-bump vendored Cranelift in SpiderMonkey and fix the issues there. Thanks!
Last updated: Dec 23 2024 at 13:07 UTC