36 lines
1.3 KiB
Markdown
36 lines
1.3 KiB
Markdown
|
The EmitC dialect allows to convert operations from other MLIR dialects to EmitC
|
||
|
|
ops. Those can be translated to C/C++ via the Cpp emitter.
|
||
|
|
|
||
|
|
The following convention is followed:
|
||
|
|
|
||
|
|
* If template arguments are passed to an `emitc.call_opaque` operation, C++ is
|
||
|
|
generated.
|
||
|
|
* If tensors are used, C++ is generated.
|
||
|
|
* If multiple return values are used within in a functions or an
|
||
|
|
`emitc.call_opaque` operation, C++11 is required.
|
||
|
|
* If floating-point type template arguments are passed to an `emitc.call_opaque`
|
||
|
|
operation, C++20 is required.
|
||
|
|
* Else the generated code is compatible with C99.
|
||
|
|
|
||
|
|
These restrictions are neither inherent to the EmitC dialect itself nor to the
|
||
|
|
Cpp emitter and therefore need to be considered while implementing conversions.
|
||
|
|
|
||
|
|
After the conversion, C/C++ code can be emitted with `mlir-translate`. The tool
|
||
|
|
supports translating MLIR to C/C++ by passing `-mlir-to-cpp`. Furthermore, code
|
||
|
|
with variables declared at top can be generated by passing the additional
|
||
|
|
argument `-declare-variables-at-top`.
|
||
|
|
|
||
|
|
Besides operations part of the EmitC dialect, the Cpp targets supports
|
||
|
|
translating the following operations:
|
||
|
|
|
||
|
|
* 'cf' Dialect
|
||
|
|
* `cf.br`
|
||
|
|
* `cf.cond_br`
|
||
|
|
* 'func' Dialect
|
||
|
|
* `func.call`
|
||
|
|
* `func.constant`
|
||
|
|
* `func.func`
|
||
|
|
* `func.return`
|
||
|
|
* 'arith' Dialect
|
||
|
|
* `arith.constant`
|