mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2025-04-10 19:15:14 +00:00
d588c26cf6
This reverts commit 8debaa34d9.
Seems to be a few regressions, namely XBox Controller Rumble, other
controllers not detecting, etc.
261 lines
6.3 KiB
C
261 lines
6.3 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2019 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.
|
|
*/
|
|
|
|
/**
|
|
* \file SDL_endian.h
|
|
*
|
|
* Functions for reading and writing endian-specific values
|
|
*/
|
|
|
|
#ifndef SDL_endian_h_
|
|
#define SDL_endian_h_
|
|
|
|
#include "SDL_stdinc.h"
|
|
|
|
/**
|
|
* \name The two types of endianness
|
|
*/
|
|
/* @{ */
|
|
#define SDL_LIL_ENDIAN 1234
|
|
#define SDL_BIG_ENDIAN 4321
|
|
/* @} */
|
|
|
|
#ifndef SDL_BYTEORDER /* Not defined in SDL_config.h? */
|
|
#ifdef __linux__
|
|
#include <endian.h>
|
|
#define SDL_BYTEORDER __BYTE_ORDER
|
|
#else /* __linux__ */
|
|
#if defined(__hppa__) || \
|
|
defined(__m68k__) || defined(mc68000) || defined(_M_M68K) || \
|
|
(defined(__MIPS__) && defined(__MISPEB__)) || \
|
|
defined(__ppc__) || defined(__POWERPC__) || defined(_M_PPC) || \
|
|
defined(__sparc__)
|
|
#define SDL_BYTEORDER SDL_BIG_ENDIAN
|
|
#else
|
|
#define SDL_BYTEORDER SDL_LIL_ENDIAN
|
|
#endif
|
|
#endif /* __linux__ */
|
|
#endif /* !SDL_BYTEORDER */
|
|
|
|
|
|
#include "begin_code.h"
|
|
/* Set up for C function definitions, even when using C++ */
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* \file SDL_endian.h
|
|
*/
|
|
#if defined(__GNUC__) && defined(__i386__) && \
|
|
!(__GNUC__ == 2 && __GNUC_MINOR__ == 95 /* broken gcc version */)
|
|
SDL_FORCE_INLINE Uint16
|
|
SDL_Swap16(Uint16 x)
|
|
{
|
|
__asm__("xchgb %b0,%h0": "=q"(x):"0"(x));
|
|
return x;
|
|
}
|
|
#elif defined(__GNUC__) && defined(__x86_64__)
|
|
SDL_FORCE_INLINE Uint16
|
|
SDL_Swap16(Uint16 x)
|
|
{
|
|
__asm__("xchgb %b0,%h0": "=Q"(x):"0"(x));
|
|
return x;
|
|
}
|
|
#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
|
|
SDL_FORCE_INLINE Uint16
|
|
SDL_Swap16(Uint16 x)
|
|
{
|
|
int result;
|
|
|
|
__asm__("rlwimi %0,%2,8,16,23": "=&r"(result):"0"(x >> 8), "r"(x));
|
|
return (Uint16)result;
|
|
}
|
|
#elif defined(__GNUC__) && (defined(__M68000__) || defined(__M68020__)) && !defined(__mcoldfire__)
|
|
SDL_FORCE_INLINE Uint16
|
|
SDL_Swap16(Uint16 x)
|
|
{
|
|
__asm__("rorw #8,%0": "=d"(x): "0"(x):"cc");
|
|
return x;
|
|
}
|
|
#elif defined(__WATCOMC__) && defined(__386__)
|
|
extern _inline Uint16 SDL_Swap16(Uint16);
|
|
#pragma aux SDL_Swap16 = \
|
|
"xchg al, ah" \
|
|
parm [ax] \
|
|
modify [ax];
|
|
#else
|
|
SDL_FORCE_INLINE Uint16
|
|
SDL_Swap16(Uint16 x)
|
|
{
|
|
return SDL_static_cast(Uint16, ((x << 8) | (x >> 8)));
|
|
}
|
|
#endif
|
|
|
|
#if defined(__GNUC__) && defined(__i386__)
|
|
SDL_FORCE_INLINE Uint32
|
|
SDL_Swap32(Uint32 x)
|
|
{
|
|
__asm__("bswap %0": "=r"(x):"0"(x));
|
|
return x;
|
|
}
|
|
#elif defined(__GNUC__) && defined(__x86_64__)
|
|
SDL_FORCE_INLINE Uint32
|
|
SDL_Swap32(Uint32 x)
|
|
{
|
|
__asm__("bswapl %0": "=r"(x):"0"(x));
|
|
return x;
|
|
}
|
|
#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
|
|
SDL_FORCE_INLINE Uint32
|
|
SDL_Swap32(Uint32 x)
|
|
{
|
|
Uint32 result;
|
|
|
|
__asm__("rlwimi %0,%2,24,16,23": "=&r"(result):"0"(x >> 24), "r"(x));
|
|
__asm__("rlwimi %0,%2,8,8,15": "=&r"(result):"0"(result), "r"(x));
|
|
__asm__("rlwimi %0,%2,24,0,7": "=&r"(result):"0"(result), "r"(x));
|
|
return result;
|
|
}
|
|
#elif defined(__GNUC__) && (defined(__M68000__) || defined(__M68020__)) && !defined(__mcoldfire__)
|
|
SDL_FORCE_INLINE Uint32
|
|
SDL_Swap32(Uint32 x)
|
|
{
|
|
__asm__("rorw #8,%0\n\tswap %0\n\trorw #8,%0": "=d"(x): "0"(x):"cc");
|
|
return x;
|
|
}
|
|
#elif defined(__WATCOMC__) && defined(__386__)
|
|
extern _inline Uint32 SDL_Swap32(Uint32);
|
|
#ifndef __SW_3 /* 486+ */
|
|
#pragma aux SDL_Swap32 = \
|
|
"bswap eax" \
|
|
parm [eax] \
|
|
modify [eax];
|
|
#else /* 386-only */
|
|
#pragma aux SDL_Swap32 = \
|
|
"xchg al, ah" \
|
|
"ror eax, 16" \
|
|
"xchg al, ah" \
|
|
parm [eax] \
|
|
modify [eax];
|
|
#endif
|
|
#else
|
|
SDL_FORCE_INLINE Uint32
|
|
SDL_Swap32(Uint32 x)
|
|
{
|
|
return SDL_static_cast(Uint32, ((x << 24) | ((x << 8) & 0x00FF0000) |
|
|
((x >> 8) & 0x0000FF00) | (x >> 24)));
|
|
}
|
|
#endif
|
|
|
|
#if defined(__GNUC__) && defined(__i386__)
|
|
SDL_FORCE_INLINE Uint64
|
|
SDL_Swap64(Uint64 x)
|
|
{
|
|
union
|
|
{
|
|
struct
|
|
{
|
|
Uint32 a, b;
|
|
} s;
|
|
Uint64 u;
|
|
} v;
|
|
v.u = x;
|
|
__asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1": "=r"(v.s.a), "=r"(v.s.b):"0"(v.s.a),
|
|
"1"(v.s.
|
|
b));
|
|
return v.u;
|
|
}
|
|
#elif defined(__GNUC__) && defined(__x86_64__)
|
|
SDL_FORCE_INLINE Uint64
|
|
SDL_Swap64(Uint64 x)
|
|
{
|
|
__asm__("bswapq %0": "=r"(x):"0"(x));
|
|
return x;
|
|
}
|
|
#else
|
|
SDL_FORCE_INLINE Uint64
|
|
SDL_Swap64(Uint64 x)
|
|
{
|
|
Uint32 hi, lo;
|
|
|
|
/* Separate into high and low 32-bit values and swap them */
|
|
lo = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
|
|
x >>= 32;
|
|
hi = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
|
|
x = SDL_Swap32(lo);
|
|
x <<= 32;
|
|
x |= SDL_Swap32(hi);
|
|
return (x);
|
|
}
|
|
#endif
|
|
|
|
|
|
SDL_FORCE_INLINE float
|
|
SDL_SwapFloat(float x)
|
|
{
|
|
union
|
|
{
|
|
float f;
|
|
Uint32 ui32;
|
|
} swapper;
|
|
swapper.f = x;
|
|
swapper.ui32 = SDL_Swap32(swapper.ui32);
|
|
return swapper.f;
|
|
}
|
|
|
|
|
|
/**
|
|
* \name Swap to native
|
|
* Byteswap item from the specified endianness to the native endianness.
|
|
*/
|
|
/* @{ */
|
|
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
|
|
#define SDL_SwapLE16(X) (X)
|
|
#define SDL_SwapLE32(X) (X)
|
|
#define SDL_SwapLE64(X) (X)
|
|
#define SDL_SwapFloatLE(X) (X)
|
|
#define SDL_SwapBE16(X) SDL_Swap16(X)
|
|
#define SDL_SwapBE32(X) SDL_Swap32(X)
|
|
#define SDL_SwapBE64(X) SDL_Swap64(X)
|
|
#define SDL_SwapFloatBE(X) SDL_SwapFloat(X)
|
|
#else
|
|
#define SDL_SwapLE16(X) SDL_Swap16(X)
|
|
#define SDL_SwapLE32(X) SDL_Swap32(X)
|
|
#define SDL_SwapLE64(X) SDL_Swap64(X)
|
|
#define SDL_SwapFloatLE(X) SDL_SwapFloat(X)
|
|
#define SDL_SwapBE16(X) (X)
|
|
#define SDL_SwapBE32(X) (X)
|
|
#define SDL_SwapBE64(X) (X)
|
|
#define SDL_SwapFloatBE(X) (X)
|
|
#endif
|
|
/* @} *//* Swap to native */
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#include "close_code.h"
|
|
|
|
#endif /* SDL_endian_h_ */
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|