/* Determine CPU support for SIMD
 * Copyright 2004 Phil Karn, KA9Q
 */
#include <stdio.h>
#include "fec.h"

/* Various SIMD instruction set names */
char *Cpu_modes[] = {"Unknown", "Portable C", "x86 Multi Media Extensions (MMX)",
                     "x86 Streaming SIMD Extensions (SSE)",
                     "x86 Streaming SIMD Extensions 2 (SSE2)",
                     "PowerPC G4/G5 Altivec/Velocity Engine"
                    };

enum cpu_mode Cpu_mode;

void find_cpu_mode(void)
{

  int f;
  if (Cpu_mode != UNKNOWN) {
    return;
  }

  /* Figure out what kind of CPU we have */
  f = cpu_features();
  if (f & (1 << 26)) { /* SSE2 is present */
    Cpu_mode = SSE2;
  }
  else if (f & (1 << 25)) { /* SSE is present */
    Cpu_mode = SSE;
  }
  else if (f & (1 << 23)) { /* MMX is present */
    Cpu_mode = MMX;
  }
  else {   /* No SIMD at all */
    Cpu_mode = PORT;
  }
  fprintf(stderr, "SIMD CPU detect: %s\n", Cpu_modes[Cpu_mode]);
}