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Chisel Intrinsics are used to express implementation defined functionality. Intrinsics provide a way for specific compilers to extend the capabilities of the language in ways which are not implementable with library code.

Intrinsics will be typechecked by the implementation. What intrinsics are available is documented by an implementation.

The Intrinsic and IntrinsicExpr can be used to create intrinsic statements and expressions.


Parameters can be passed as an argument to the IntModule constructor.

Intrinsic Expression Example

This following creates an intrinsic for the intrinsic named "MyIntrinsic". It takes a parameter named "STRING" and has several inputs.

class Foo extends RawModule {
val myresult = IntrinsicExpr("MyIntrinsic", UInt(32.W), "STRING" -> "test")(3.U, 5.U)