/*

 * Copyright © 2024 Filip Wasil, Samsung Electronics

 *

 * Permission to use, copy, modify, distribute, and sell this software and its

 * documentation for any purpose is hereby granted without fee, provided that

 * the above copyright notice appear in all copies and that both that

 * copyright notice and this permission notice appear in supporting

 * documentation, and that the name of Keith Packard not be used in

 * advertising or publicity pertaining to distribution of the software without

 * specific, written prior permission.  Keith Packard makes no

 * representations about the suitability of this software for any purpose.  It

 * is provided "as is" without express or implied warranty.

 *

 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS

 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND

 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY

 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN

 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING

 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

 * SOFTWARE.

 */

#ifdef HAVE_CONFIG_H

#include <pixman-config.h>

#endif

#include "pixman-private.h"

#ifdef USE_RVV

#if defined(__linux__)

#include <asm/hwcap.h>

#include <sys/auxv.h>

#endif

typedef enum

{

    RVV = (1 << 0),

} riscv_cpu_features_t;

static riscv_cpu_features_t

detect_cpu_features (void)

{

    riscv_cpu_features_t features = 0;

#if defined(__linux__)

    if (getauxval (AT_HWCAP) & COMPAT_HWCAP_ISA_V)

    {

  features |= RVV;

    }

#else

#pragma message(                                                               \

    "warning: RISC-V Vector Extension runtime check not implemented for this platform. RVV will be disabled")

#endif

    return features;

}

#endif

pixman_implementation_t *

_pixman_riscv_get_implementations (pixman_implementation_t *imp)

{

#ifdef USE_RVV

    if (!_pixman_disabled ("rvv") && (detect_cpu_features () & RVV))

    {

  imp = _pixman_implementation_create_rvv (imp);

    }

#endif

    return imp;

}