persist constants file (#63)

Summary:
Pull Request resolved: #63

For OSS, we can not have a buck genrule for the python constants file. Instead, we move the gen rule into a bash script

Reviewed By: salilsdesai

Differential Revision: D48338629

fbshipit-source-id: afb66730e0ffd2c068937ff0d93df62024b305a4

Author: mcr229

backends/xnnpack/utils/TARGETS

@@ -1,27 +1,8 @@
-load("@fbcode_macros//build_defs:native_rules.bzl", "buck_genrule")
 load("@fbcode_macros//build_defs:python_library.bzl", "python_library")
 
-buck_genrule(
-    name = "xnnpack_constants",
-    srcs = {
-        "xnnpack.h": "//xplat/third-party/XNNPACK:xnnpack.h",
-    },
-    outs = {
-        "xnnpack_constants.py": ["xnnpack_constants.py"],
-    },
-    cmd = " && ".join([
-        "echo UINT32_MAX = 4294967295 > ${OUT}/xnnpack_constants.py",
-        "awk '/^#define\\s+XNN_/ { print $2,\"=\",$3} ' xnnpack.h >> ${OUT}/xnnpack_constants.py",
-        "if ! grep -qc \"^XNN_\" ${OUT}/xnnpack_constants.py; then false; fi",
-    ]),
-    visibility = [
-        "//executorch/backends/xnnpack/utils:xnnpack_utils",
-    ],
-)
-
 python_library(
     name = "xnnpack_utils",
-    srcs = glob(["*.py"]) + [":xnnpack_constants[xnnpack_constants.py]"],
+    srcs = glob(["*.py"]),
     deps = [
         "//caffe2:torch",
         "//executorch/exir:lib",

backends/xnnpack/utils/gen_xnnpack_constants.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+# Usage:
+# This script is used to autogenerate constants found in the xnnpack header file
+# as constants in python, which is used in xnnpack delegate. This script requires
+# the path to the XNNPACK folder as an argument
+
+# Example:
+# bash gen_xnnpack_constants.sh ~/fbsource/xplat/third-party/XNNPACK/XNNPACK
+
+
+# constant's file header
+{
+    echo "# Copyright (c) Meta Platforms, Inc. and affiliates."
+    echo "# All rights reserved."
+    echo "#"
+    echo "# This source code is licensed under the BSD-style license found in the"
+    echo "# LICENSE file in the root directory of this source tree."
+    echo ""
+    echo "# Auto-generated by gen_xnnpack_constants.sh script. Do not modify"
+} > xnnpack_constants.py
+
+echo UINT32_MAX = 4294967295 >> xnnpack_constants.py
+awk '/^#define\s+XNN_/ { print $2,"=",$3} ' "$1"/include/xnnpack.h >> xnnpack_constants.py
+if ! grep -qc "^XNN_" xnnpack_constants.py; then false; fi

backends/xnnpack/utils/xnnpack_constants.py

@@ -0,0 +1,29 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+# Auto-generated by gen_xnnpack_constants.sh script. Do not modify
+UINT32_MAX = 4294967295
+XNN_EXTRA_BYTES = 16
+XNN_MAX_TENSOR_DIMS = 6
+XNN_FLAG_SPARSE_INFERENCE = 0x00000001
+XNN_FLAG_HINT_SPARSE_INFERENCE = XNN_FLAG_SPARSE_INFERENCE
+XNN_FLAG_FP16_INFERENCE = 0x00000002
+XNN_FLAG_HINT_FP16_INFERENCE = XNN_FLAG_FP16_INFERENCE
+XNN_FLAG_FORCE_FP16_INFERENCE = 0x00000004
+XNN_FLAG_BASIC_PROFILING = 0x00000008
+XNN_FLAG_DEPTHWISE_CONVOLUTION = 0x00000001
+XNN_FLAG_TRANSPOSE_WEIGHTS = 0x00000001
+XNN_FLAG_INPUT_NHWC = 0x00000002
+XNN_FLAG_TENSORFLOW_SAME_PADDING = 0x00000004
+XNN_FLAG_TENSORFLOW_RESHAPE_2D = 0x00000004
+XNN_FLAG_TENSORFLOW_LEGACY_MODE = 0x00000004
+XNN_FLAG_FP32_STATIC_WEIGHTS = 0x00000008
+XNN_FLAG_ALIGN_CORNERS = 0x00000008
+XNN_FLAG_YIELD_WORKERS = 0x00000010
+XNN_VALUE_FLAG_EXTERNAL_INPUT = 0x00000001
+XNN_VALUE_FLAG_EXTERNAL_OUTPUT = 0x00000002
+XNN_VALUE_FLAG_PERSISTENT = 0x00000004
+XNN_INVALID_VALUE_ID = UINT32_MAX