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Complete reference types proposal (#531)

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This commit completes the reference-types proposal implementation.

Notably, this adds support for 
* `ref.is_null`, `ref.func`, `ref.is_null` instructions
* `table.get`, `table.set`, `table.grow`, `table.size` and `table.fill` instructions
* `Externref` and `Funcref` types (including invocation via uint64 encoding).

part of #484

Signed-off-by: Takeshi Yoneda <takeshi@tetrate.io>
This commit is contained in:
Takeshi Yoneda
2022-05-10 17:56:03 +09:00
committed by GitHub
parent 03bfa31928
commit 20e46a9fdf
63 changed files with 3255 additions and 251 deletions
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17
api/wasm.go
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@@ -59,6 +59,7 @@ func ExternTypeName(et ExternType) string {
// * ValueTypeI64 - uint64(int64)
// * ValueTypeF32 - EncodeF32 DecodeF32 from float32
// * ValueTypeF64 - EncodeF64 DecodeF64 from float64
// * ValueTypeExternref - unintptr(unsafe.Pointer(p)) where p is any pointer type in Go (e.g. *string)
//
// Ex. Given a Text Format type use (param i64) (result i64), no conversion is necessary.
//
@@ -81,8 +82,20 @@ const (
ValueTypeI64 ValueType = 0x7e
// ValueTypeF32 is a 32-bit floating point number.
ValueTypeF32 ValueType = 0x7d
// ValueTypeF64 is a 32-bit floating point number.
// ValueTypeF64 is a 64-bit floating point number.
ValueTypeF64 ValueType = 0x7c
// ValueTypeExternref is a externref type.
//
// Note: in wazero, externref type value are opaque raw 64-bit pointers, and the ValueTypeExternref type
// in the signature will be translated as uintptr in wazero's API level.
// For example, the import function `(func (import "env" "f") (param externref) (result externref))` can be defined in Go as:
//
// r.NewModuleBuilder("env").ExportFunctions(map[string]interface{}{
// "f": func(externref uintptr) (resultExternRef uintptr) { return },
// })
//
// Note: The usage of this type is toggled with WithFeatureBulkMemoryOperations.
ValueTypeExternref ValueType = 0x6f
)
// ValueTypeName returns the type name of the given ValueType as a string.
@@ -99,6 +112,8 @@ func ValueTypeName(t ValueType) string {
return "f32"
case ValueTypeF64:
return "f64"
case ValueTypeExternref:
return "externref"
}
return "unknown"
}