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[HW][CAPI] Add a function for getting port info from module #8491

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Merged
merged 1 commit into from
May 31, 2025
Merged

[HW][CAPI] Add a function for getting port info from module #8491

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5 changes: 5 additions & 0 deletions include/circt-c/Dialect/HW.h
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Original file line number Diff line number Diff line change
Expand Up @@ -124,6 +124,11 @@ MLIR_CAPI_EXPORTED MlirType hwModuleTypeGetOutputType(MlirType type,
/// Get an HW module type's output name at a specific index.
MLIR_CAPI_EXPORTED MlirStringRef hwModuleTypeGetOutputName(MlirType type,
intptr_t index);

/// Get an HW module type's port info at a specific index.
MLIR_CAPI_EXPORTED void hwModuleTypeGetPort(MlirType type, intptr_t index,
HWModulePort *ret);

/// Creates an HW struct type in the context associated with the elements.
MLIR_CAPI_EXPORTED MlirType hwStructTypeGet(MlirContext ctx,
intptr_t numElements,
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23 changes: 23 additions & 0 deletions lib/CAPI/Dialect/HW.cpp
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Expand Up @@ -129,6 +129,29 @@ MlirStringRef hwModuleTypeGetOutputName(MlirType type, intptr_t index) {
return wrap(cast<ModuleType>(unwrap(type)).getOutputName(index));
}

void hwModuleTypeGetPort(MlirType type, intptr_t index, HWModulePort *ret) {
auto port = cast<ModuleType>(unwrap(type)).getPorts()[index];

HWModulePortDirection dir;
switch (port.dir) {
case ModulePort::Direction::Input:
dir = HWModulePortDirection::Input;
break;
case ModulePort::Direction::Output:
dir = HWModulePortDirection::Output;
break;
case ModulePort::Direction::InOut:
dir = HWModulePortDirection::InOut;
break;
default:
llvm_unreachable("unknown ModulePort::Direction");
}

ret->name = wrap(static_cast<Attribute>(port.name));
ret->type = wrap(port.type);
ret->dir = dir;
}

bool hwTypeIsAStructType(MlirType type) {
return isa<StructType>(unwrap(type));
}
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