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comparison include/SDL_endian.h @ 985:cec525374267

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Add m68k assembly routines for endianness conversion
author Patrice Mandin <patmandin@gmail.com>
date Mon, 22 Nov 2004 10:16:58 +0000
parents 6b28c91bf3d2
children c4e5473672b6
comparison
equal deleted inserted replaced
984:44fd54a0ae5f 985:cec525374267
77 Uint16 result; 77 Uint16 result;
78 78
79 __asm__("rlwimi %0,%2,8,16,23" : "=&r" (result) : "0" (x >> 8), "r" (x)); 79 __asm__("rlwimi %0,%2,8,16,23" : "=&r" (result) : "0" (x >> 8), "r" (x));
80 return result; 80 return result;
81 } 81 }
82 #elif defined(__GNUC__) && defined(__M68000__)
83 static __inline__ Uint16 SDL_Swap16(Uint16 x)
84 {
85 __asm__("rorw #8,%0" : "=d" (x) : "0" (x) : "cc");
86 return x;
87 }
82 #else 88 #else
83 static __inline__ Uint16 SDL_Swap16(Uint16 x) { 89 static __inline__ Uint16 SDL_Swap16(Uint16 x) {
84 return((x<<8)|(x>>8)); 90 return((x<<8)|(x>>8));
85 } 91 }
86 #endif 92 #endif
104 110
105 __asm__("rlwimi %0,%2,24,16,23" : "=&r" (result) : "0" (x>>24), "r" (x)); 111 __asm__("rlwimi %0,%2,24,16,23" : "=&r" (result) : "0" (x>>24), "r" (x));
106 __asm__("rlwimi %0,%2,8,8,15" : "=&r" (result) : "0" (result), "r" (x)); 112 __asm__("rlwimi %0,%2,8,8,15" : "=&r" (result) : "0" (result), "r" (x));
107 __asm__("rlwimi %0,%2,24,0,7" : "=&r" (result) : "0" (result), "r" (x)); 113 __asm__("rlwimi %0,%2,24,0,7" : "=&r" (result) : "0" (result), "r" (x));
108 return result; 114 return result;
115 }
116 #elif defined(__GNUC__) && defined(__M68000__)
117 static __inline__ Uint16 SDL_Swap32(Uint16 x)
118 {
119 __asm__("rorw #8,%0;\t\nswap %0;\t\nror #8,%0" : "=d" (x) : "0" (x) : "cc");
120 return x;
109 } 121 }
110 #else 122 #else
111 static __inline__ Uint32 SDL_Swap32(Uint32 x) { 123 static __inline__ Uint32 SDL_Swap32(Uint32 x) {
112 return((x<<24)|((x<<8)&0x00FF0000)|((x>>8)&0x0000FF00)|(x>>24)); 124 return((x<<24)|((x<<8)&0x00FF0000)|((x>>8)&0x0000FF00)|(x>>24));
113 } 125 }