Add ktx

ktx/external/astc-encoder/Source/astcenccli_entry2.cpp

@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: Apache-2.0
+// ----------------------------------------------------------------------------
+// Copyright 2024 Arm Limited
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy
+// of the License at:
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+// ----------------------------------------------------------------------------
+
+/**
+ * @brief Application entry point second veneer.
+ *
+ * This module contains the second command line entry point veneer, used to
+ * validate that Arm SVE vector width matches the tool build. When used, it is
+ * compiled with SVE ISA support but without any vector legnth override, so it
+ * will see the native SVE vector length exposed to the application.
+ */
+
+#include <cstdio>
+
+#if ASTCENC_SVE != 0
+	#include <arm_sve.h>
+#endif
+
+/**
+ * @brief The main entry point.
+ *
+ * @param argc   The number of arguments.
+ * @param argv   The vector of arguments.
+ *
+ * @return 0 on success, non-zero otherwise.
+ */
+int astcenc_main(
+	int argc,
+	char **argv);
+
+/**
+ * @brief Print a formatted string to stderr.
+ */
+template<typename ... _Args>
+static inline void print_error(
+	const char* format,
+	_Args...args
+) {
+	fprintf(stderr, format, args...);
+}
+
+int astcenc_main_veneer(
+	int argc,
+	char **argv
+) {
+	// We don't need this check for 128-bit SVE, because that is compiled as
+	// VLA code, using predicate masks in the augmented NEON.
+#if ASTCENC_SVE > 4
+	// svcntw() returns compile-time length if used with -msve-vector-bits
+	if (svcntw() != ASTCENC_SVE)
+	{
+		int bits = ASTCENC_SVE * 32;
+		print_error("ERROR: Host SVE support is not a %u-bit implementation\n", bits);
+		return 1;
+	}
+#endif
+
+	return astcenc_main(argc, argv);
+}