Update information on Func to EmitC (#412)

README.md

@@ -73,6 +73,7 @@ The `emitc-opt` tool supports the following options:
 
 | option                                     |                                                                          |
 | :----------------------------------------- |:------------------------------------------------------------------------ |
+| `--convert-func-to-emitc`                  | Convert Func dialect to EmitC dialect                                    |
 | `--convert-scf-to-emitc`                   | Convert SCF dialect to EmitC dialect, maintaining structured control flow|
 | `--convert-stablehlo-region-ops-to-emitc ` | Convert StableHLO operations containing regions to EmitC dialect.        |
 | `--convert-stablehlo-to-emitc `            | Convert from StableHLO dialect to EmitC dialect.                         |

docs/func-op-coverage.md

@@ -4,10 +4,18 @@ SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 -->
 # Func Op Coverage
 
-The table below shows the supported func ops.
+The table below shows the func ops, supported with the `--convert-func-to-emitc` **upstream** conversion.
+
+| op                    | supported          | comment |
+| :-------------------- |:------------------:| :------ |
+| call                  | :heavy_check_mark: | |
+| func                  | :heavy_check_mark: | |
+| return                | :heavy_check_mark: | |
+
+The table below shows the func ops, supported **upstream** via `--mlir-to-cpp`
 
 | op                    | supported          | comment |
 | :-------------------- |:------------------:| :------ |
 | call                  | :white_check_mark: | via `emitc-translate` |
-| constant              | :white_check_mark: | via `emitc-translate` |
+| func                  | :white_check_mark: | via `emitc-translate` |
 | return                | :white_check_mark: | via `emitc-translate` |