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annotate test/testendian.c @ 1230:88c2d6aed428

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From Mike Frysinger and/or Gentoo: - libsdl-PIC-load-mmx-masks-from-stack.patch this one may be a little controversial ... the fix here is again that you cant reference the memory addresses like this to load into a mmx register, so the way to do it is to push two 32bit words onto the stack, load the 64bit value off of the stack into the mmx register, and then adjust the stack so that it's back to normal.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 05 Jan 2006 15:25:19 +0000
parents c203b4a42701
children 983df4f9c1c6
rev   line source
850
c203b4a42701 Added an endian detection and byte swapping test program
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1
c203b4a42701 Added an endian detection and byte swapping test program
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2 /* Test program to check SDL's CPU endian detection and byte swapping routines */
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3
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4 #include <stdio.h>
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6 #include "SDL.h"
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7 #include "SDL_endian.h"
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9 int main(int argc, char *argv[])
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10 {
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11 Uint16 value16 = 0xCDAB;
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12 Uint32 value32 = 0xEFBEADDE;
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13 #if defined(__GNUC__) && defined(SDL_HAS_64BIT_TYPE)
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14 Uint64 value64 = 0xEFBEADDECDAB3412LL;
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15 #endif
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17 printf("This is a %s endian machine.\n",
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18 (SDL_BYTEORDER == SDL_LIL_ENDIAN) ? "little" : "big");
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19 printf("Value 16 = 0x%X, swapped = 0x%X\n", value16, SDL_Swap16(value16));
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20 printf("Value 32 = 0x%X, swapped = 0x%X\n", value32, SDL_Swap32(value32));
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21 #if defined(__GNUC__) && defined(SDL_HAS_64BIT_TYPE)
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22 printf("Value 64 = 0x%llX, swapped = 0x%llX\n", value64, SDL_Swap64(value64));
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23 #endif
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24 return(0);
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25 }