Mercurial > sdl-ios-xcode
changeset 985:cec525374267
Add m68k assembly routines for endianness conversion
author | Patrice Mandin <patmandin@gmail.com> |
---|---|
date | Mon, 22 Nov 2004 10:16:58 +0000 |
parents | 44fd54a0ae5f |
children | 952ec1ddcb58 |
files | include/SDL_endian.h |
diffstat | 1 files changed, 12 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/include/SDL_endian.h Sun Nov 21 21:59:47 2004 +0000 +++ b/include/SDL_endian.h Mon Nov 22 10:16:58 2004 +0000 @@ -79,6 +79,12 @@ __asm__("rlwimi %0,%2,8,16,23" : "=&r" (result) : "0" (x >> 8), "r" (x)); return result; } +#elif defined(__GNUC__) && defined(__M68000__) +static __inline__ Uint16 SDL_Swap16(Uint16 x) +{ + __asm__("rorw #8,%0" : "=d" (x) : "0" (x) : "cc"); + return x; +} #else static __inline__ Uint16 SDL_Swap16(Uint16 x) { return((x<<8)|(x>>8)); @@ -107,6 +113,12 @@ __asm__("rlwimi %0,%2,24,0,7" : "=&r" (result) : "0" (result), "r" (x)); return result; } +#elif defined(__GNUC__) && defined(__M68000__) +static __inline__ Uint16 SDL_Swap32(Uint16 x) +{ + __asm__("rorw #8,%0;\t\nswap %0;\t\nror #8,%0" : "=d" (x) : "0" (x) : "cc"); + return x; +} #else static __inline__ Uint32 SDL_Swap32(Uint32 x) { return((x<<24)|((x<<8)&0x00FF0000)|((x>>8)&0x0000FF00)|(x>>24));