// 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);

}