ladybird/AK/Memory.h
Brian Gianforcaro 1682f0b760 Everything: Move to SPDX license identifiers in all files.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.

See: https://spdx.dev/resources/use/#identifiers

This was done with the `ambr` search and replace tool.

 ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
2021-04-22 11:22:27 +02:00

33 lines
650 B
C

/*
* 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");
}