Ops.td

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//===-- Ops.td ---------------------------------------------*- tablegen -*-===//
//
// Part of the LLZK Project, under the Apache License v2.0.
// See LICENSE.txt for license information.
// Copyright 2025 Veridise Inc.
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
 
#ifndef LLZK_CAST_OPS
#define LLZK_CAST_OPS
 
include "llzk/Dialect/Shared/Types.td"
include "llzk/Dialect/Cast/IR/Dialect.td"
include "llzk/Dialect/Felt/IR/Types.td"
 
include "mlir/IR/OpBase.td"
include "mlir/Interfaces/SideEffectInterfaces.td"
include "mlir/IR/SymbolInterfaces.td"
 
def LLZK_IntToFeltOp : Op<CastDialect, "tofelt", [Pure]> {
  let summary = "convert an integer into a field element";
  let description = [{
    This operation converts a supported integer type value into a field element value.
 
    Example:
 
    ```llzk
    %0 = bool.cmp lt(%a, %b)
    %1 = cast.tofelt %0 : i1
    ```
  }];
 
  let arguments = (ins AnyLLZKIntType:$value);
  let results = (outs LLZK_FeltType:$result);
  let assemblyFormat = [{ $value `:` type($value) attr-dict }];
}
 
def LLZK_FeltToIndexOp : Op<CastDialect, "toindex", [Pure]> {
  let summary = "convert a field element into an index";
  let description = [{
    This operation converts a field element value into an index value to allow
    use as an array index or loop bound. In struct @constrain functions, the
    argument to this op is not allowed to be derived from a Signal struct.
 
    Example:
    ```llzk
    %0 = cast.toindex %a
    %1 = array.read %b[%0]
    ```
  }];
 
  let arguments = (ins LLZK_FeltType:$value);
  let results = (outs Index:$result);
  let assemblyFormat = [{ $value attr-dict }];
 
  let hasVerifier = 1;
}
 
#endif // LLZK_CAST_OPS