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fuzzgen: Add scalar float support (#4467)

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* fuzzgen: Add float support

Add support for generating floats and some float instructions.

* fuzzgen: Enable NaN Canonicalization

Both IEEE754 and the Wasm spec are somewhat loose about what is allowed
to be returned from NaN producing operations. And in practice this changes
from X86 to Aarch64 and others. Even in the same host machine, the
interpreter may produce a code sequence different from cranelift that
generates different NaN's but produces legal results according to the spec.

These differences cause spurious failures in the fuzzer. To fix this
we enable the NaN Canonicalization pass that replaces any NaN's produced
with a single fixed canonical NaN value.

* fuzzgen: Use `MultiAry` when inserting opcodes

This deduplicates a few inserters!
This commit is contained in:
Afonso Bordado
2022-07-21 01:33:49 +01:00
committed by GitHub
parent 06407dd337
commit a0a2fd1627
4 changed files with 135 additions and 45 deletions
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@@ -584,6 +584,7 @@ dependencies = [
"anyhow",
"arbitrary",
"cranelift",
"cranelift-native",
]
[[package]]