AK/Memory.h


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/*
 * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

#include <AK/Types.h>

#if defined(KERNEL)
#    include <Kernel/StdLib.h>
#else
#    include <stdlib.h>
#    include <string.h>
#endif

ALWAYS_INLINE void fast_u32_copy(u32* dest, const u32* src, size_t count)
{
    asm volatile(
        "rep movsl\n"
        : "+S"(src), "+D"(dest), "+c"(count)::"memory");
}

ALWAYS_INLINE void fast_u32_fill(u32* dest, u32 value, size_t count)
{
    asm volatile(
        "rep stosl\n"
        : "=D"(dest), "=c"(count)
        : "D"(dest), "c"(count), "a"(value)
        : "memory");
}