Attachment 9958 Details for Bug 22525 – Program containing embedded assembler code

Program containing embedded assembler code

mmx.c (text/plain), 624 bytes, created by Len Lawrence on 2018-02-06 14:04:38 CET

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Creator: Len Lawrence

Created: 2018-02-06 14:04:38 CET

Size: 624 bytes

patch

obsolete

#include <stdio.h>

int detect_mmx( void )

{
  int mmx_bit;

  asm( "mov    %2, %%eax     \n\t"     // request feature flag
       "cpuid                \n\t"     // get CPU ID flag
       "and    %1, %%edx     \n\t"     // check MMX bit (bit 23)
       "mov    %%edx, %0     \n\t"     // move result to mmx_bit

       :       "=m" (mmx_bit)          // %0

       :       "i"  (0x00000001),      // %1
               "i"  (0x00800000)       // %2
     );

  return mmx_bit;
}

int main( int argc, char** argv )

{
  if ( detect_mmx() )
     printf("MMX is detected !\n");
  else
     printf("MMX is NOT detected !\n");
}

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Attachments on bug 22525: 9956 | 9958