mirror of
https://github.com/godotengine/godot.git
synced 2025-10-20 00:13:30 +00:00
0b3496fb4f
Made possible by EIREXE, xsellier and the SDL team. This commit includes statically linked SDL3 for Windows, Linux and macOS. The vendored copy of SDL3 was setup to only build the required subsystems for gamepad/joystick support, with some patches to be able to make it as minimal as possible and reduce the impact on binary size and code size. Co-authored-by: Álex Román Núñez <eirexe123@gmail.com> Co-authored-by: Xavier Sellier <xsellier@gmail.com> Co-authored-by: Rémi Verschelde <rverschelde@gmail.com>
101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely, subject to the following restrictions:
|
|
|
|
1. The origin of this software must not be misrepresented; you must not
|
|
claim that you wrote the original software. If you use this software
|
|
in a product, an acknowledgment in the product documentation would be
|
|
appreciated but is not required.
|
|
2. Altered source versions must be plainly marked as such, and must not be
|
|
misrepresented as being the original software.
|
|
3. This notice may not be removed or altered from any source distribution.
|
|
*/
|
|
#include "SDL_internal.h"
|
|
|
|
|
|
#ifdef SDL_memcpy
|
|
#undef SDL_memcpy
|
|
#endif
|
|
#if SDL_DYNAMIC_API
|
|
#define SDL_memcpy SDL_memcpy_REAL
|
|
#endif
|
|
void *SDL_memcpy(SDL_OUT_BYTECAP(len) void *dst, SDL_IN_BYTECAP(len) const void *src, size_t len)
|
|
{
|
|
#if defined(__GNUC__) && (defined(HAVE_LIBC) && HAVE_LIBC)
|
|
/* Presumably this is well tuned for speed.
|
|
On my machine this is twice as fast as the C code below.
|
|
*/
|
|
return __builtin_memcpy(dst, src, len);
|
|
#elif defined(HAVE_MEMCPY)
|
|
return memcpy(dst, src, len);
|
|
#elif defined(HAVE_BCOPY)
|
|
bcopy(src, dst, len);
|
|
return dst;
|
|
#else
|
|
/* GCC 4.9.0 with -O3 will generate movaps instructions with the loop
|
|
using Uint32* pointers, so we need to make sure the pointers are
|
|
aligned before we loop using them.
|
|
*/
|
|
if (((uintptr_t)src & 0x3) || ((uintptr_t)dst & 0x3)) {
|
|
// Do an unaligned byte copy
|
|
Uint8 *srcp1 = (Uint8 *)src;
|
|
Uint8 *dstp1 = (Uint8 *)dst;
|
|
|
|
while (len--) {
|
|
*dstp1++ = *srcp1++;
|
|
}
|
|
} else {
|
|
size_t left = (len % 4);
|
|
Uint32 *srcp4, *dstp4;
|
|
Uint8 *srcp1, *dstp1;
|
|
|
|
srcp4 = (Uint32 *)src;
|
|
dstp4 = (Uint32 *)dst;
|
|
len /= 4;
|
|
while (len--) {
|
|
*dstp4++ = *srcp4++;
|
|
}
|
|
|
|
srcp1 = (Uint8 *)srcp4;
|
|
dstp1 = (Uint8 *)dstp4;
|
|
switch (left) {
|
|
case 3:
|
|
*dstp1++ = *srcp1++;
|
|
SDL_FALLTHROUGH;
|
|
case 2:
|
|
*dstp1++ = *srcp1++;
|
|
SDL_FALLTHROUGH;
|
|
case 1:
|
|
*dstp1++ = *srcp1++;
|
|
}
|
|
}
|
|
return dst;
|
|
#endif // HAVE_MEMCPY
|
|
}
|
|
|
|
/* The optimizer on Visual Studio 2005 and later generates memcpy() and memset() calls.
|
|
We will provide our own implementation if we're not building with a C runtime. */
|
|
#ifndef HAVE_LIBC
|
|
// NOLINTNEXTLINE(readability-redundant-declaration)
|
|
extern void *memcpy(void *dst, const void *src, size_t len);
|
|
#if defined(_MSC_VER) && !defined(__INTEL_LLVM_COMPILER)
|
|
#pragma intrinsic(memcpy)
|
|
#endif
|
|
|
|
#if defined(_MSC_VER) && !defined(__clang__)
|
|
#pragma function(memcpy)
|
|
#endif
|
|
// NOLINTNEXTLINE(readability-inconsistent-declaration-parameter-name)
|
|
void *memcpy(void *dst, const void *src, size_t len)
|
|
{
|
|
return SDL_memcpy(dst, src, len);
|
|
}
|
|
#endif // !HAVE_LIBC
|