144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
#ifndef DEFINES_H
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#define DEFINES_H
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typedef uint16_t Uint16;
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typedef uint32_t Uint32;
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#define MIN(a,b) (((a)<(b))?(a):(b))
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#define MAX(a,b) (((a)>(b))?(a):(b))
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#if defined(__GNUC__) && defined(__i386__) && \
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!(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
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static __inline__ Uint16 SDL_Swap16(Uint16 x)
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{
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__asm__("xchgb %b0,%h0" : "=q" (x) : "0" (x));
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return x;
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}
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#elif defined(__GNUC__) && defined(__x86_64__)
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static __inline__ Uint16 SDL_Swap16(Uint16 x)
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{
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__asm__("xchgb %b0,%h0" : "=Q" (x) : "0" (x));
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return x;
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}
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#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
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static __inline__ Uint16 SDL_Swap16(Uint16 x)
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{
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int result;
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__asm__("rlwimi %0,%2,8,16,23" : "=&r" (result) : "0" (x >> 8), "r" (x));
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return (Uint16)result;
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}
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#elif defined(__GNUC__) && (defined(__m68k__) && !defined(__mcoldfire__))
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static __inline__ Uint16 SDL_Swap16(Uint16 x)
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{
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__asm__("rorw #8,%0" : "=d" (x) : "0" (x) : "cc");
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return x;
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}
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#else
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static __inline__ Uint16 SDL_Swap16(Uint16 x) {
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return SDL_static_cast(Uint16, ((x<<8)|(x>>8)));
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}
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#endif
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#if defined(__GNUC__) && defined(__i386__) && \
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!(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
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static __inline__ Uint32 SDL_Swap32(Uint32 x)
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{
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__asm__("bswap %0" : "=r" (x) : "0" (x));
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return x;
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}
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#elif defined(__GNUC__) && defined(__x86_64__)
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static __inline__ Uint32 SDL_Swap32(Uint32 x)
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{
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__asm__("bswapl %0" : "=r" (x) : "0" (x));
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return x;
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}
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#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
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static __inline__ Uint32 SDL_Swap32(Uint32 x)
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{
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Uint32 result;
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__asm__("rlwimi %0,%2,24,16,23" : "=&r" (result) : "0" (x>>24), "r" (x));
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__asm__("rlwimi %0,%2,8,8,15" : "=&r" (result) : "0" (result), "r" (x));
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__asm__("rlwimi %0,%2,24,0,7" : "=&r" (result) : "0" (result), "r" (x));
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return result;
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}
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#elif defined(__GNUC__) && (defined(__m68k__) && !defined(__mcoldfire__))
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static __inline__ Uint32 SDL_Swap32(Uint32 x)
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{
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__asm__("rorw #8,%0\n\tswap %0\n\trorw #8,%0" : "=d" (x) : "0" (x) : "cc");
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return x;
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}
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#else
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static __inline__ Uint32 SDL_Swap32(Uint32 x) {
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return SDL_static_cast(Uint32, ((x<<24)|((x<<8)&0x00FF0000)|((x>>8)&0x0000FF00)|(x>>24)));
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}
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#endif
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#ifdef SDL_HAS_64BIT_TYPE
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#if defined(__GNUC__) && defined(__i386__) && \
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!(__GNUC__ == 2 && __GNUC_MINOR__ <= 95 /* broken gcc version */)
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static __inline__ Uint64 SDL_Swap64(Uint64 x)
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{
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union {
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struct { Uint32 a,b; } s;
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Uint64 u;
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} v;
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v.u = x;
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__asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
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: "=r" (v.s.a), "=r" (v.s.b)
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: "0" (v.s.a), "1" (v.s.b));
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return v.u;
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}
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#elif defined(__GNUC__) && defined(__x86_64__)
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static __inline__ Uint64 SDL_Swap64(Uint64 x)
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{
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__asm__("bswapq %0" : "=r" (x) : "0" (x));
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return x;
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}
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#else
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static __inline__ Uint64 SDL_Swap64(Uint64 x)
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{
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Uint32 hi, lo;
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/* Separate into high and low 32-bit values and swap them */
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lo = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
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x >>= 32;
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hi = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
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x = SDL_Swap32(lo);
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x <<= 32;
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x |= SDL_Swap32(hi);
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return (x);
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}
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#endif
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#else
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/* This is mainly to keep compilers from complaining in SDL code.
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* If there is no real 64-bit datatype, then compilers will complain about
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* the fake 64-bit datatype that SDL provides when it compiles user code.
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*/
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#define SDL_Swap64(X) (X)
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#endif /* SDL_HAS_64BIT_TYPE */
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/*@}*/
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#if SDL_BYTEORDER == SDL_LIL_ENDIAN
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#define SDL_SwapLE16(X) (X)
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#define SDL_SwapLE32(X) (X)
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#define SDL_SwapLE64(X) (X)
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#define SDL_SwapBE16(X) SDL_Swap16(X)
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#define SDL_SwapBE32(X) SDL_Swap32(X)
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#define SDL_SwapBE64(X) SDL_Swap64(X)
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#else
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#define SDL_SwapLE16(X) SDL_Swap16(X)
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#define SDL_SwapLE32(X) SDL_Swap32(X)
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#define SDL_SwapLE64(X) SDL_Swap64(X)
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#define SDL_SwapBE16(X) (X)
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#define SDL_SwapBE32(X) (X)
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#define SDL_SwapBE64(X) (X)
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#endif
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#endif // DEFINES_H
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