/* -*- c++ -*- */

/*

 * Copyright 2002,2009 Free Software Foundation, Inc.

 * 

 * This file is part of GNU Radio

 * 

 * GNU Radio is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3, or (at your option)

 * any later version.

 * 

 * GNU Radio is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 * 

 * You should have received a copy of the GNU General Public License

 * along with GNU Radio; see the file COPYING.  If not, write to

 * the Free Software Foundation, Inc., 51 Franklin Street,

 * Boston, MA 02110-1301, USA.

 */

#include <gr_cpu.h>

#include "gcc_x86_cpuid.h"

/*

 * execute CPUID instruction, return EAX, EBX, ECX and EDX values in result

 */

#define cpuid_x86(op, r) __get_cpuid(op, r+0, r+1, r+2, r+3)

/*

 * CPUID functions returning a single datum

 */

static inline unsigned int cpuid_eax(unsigned int op)

{

  unsigned int        regs[4] = {0,0,0,0};

  cpuid_x86 (op, regs);

  return regs[0];

}

static inline unsigned int cpuid_ebx(unsigned int op)

{

  unsigned int        regs[4] = {0,0,0,0};

  cpuid_x86 (op, regs);

  return regs[1];

}

static inline unsigned int cpuid_ecx(unsigned int op)

{

  unsigned int        regs[4] = {0,0,0,0};

  cpuid_x86 (op, regs);

  return regs[2];

}

static inline unsigned int cpuid_edx(unsigned int op)

{

  unsigned int        regs[4] = {0,0,0,0};

  cpuid_x86 (op, regs);

  return regs[3];

}

// ----------------------------------------------------------------

bool

gr_cpu::has_mmx ()

{

  unsigned int edx = cpuid_edx (1);        // standard features

  return (edx & (1 << 23)) != 0;

}

bool

gr_cpu::has_sse ()

{

  unsigned int edx = cpuid_edx (1);        // standard features

  return (edx & (1 << 25)) != 0;

}

bool

gr_cpu::has_sse2 ()

{

  unsigned int edx = cpuid_edx (1);        // standard features

  return (edx & (1 << 26)) != 0;

}

bool

gr_cpu::has_3dnow ()

{

  unsigned int extended_fct_count = cpuid_eax (0x80000000);

  if (extended_fct_count < 0x80000001)

    return false;

  unsigned int extended_features = cpuid_edx (0x80000001);

  return (extended_features & (1 << 31)) != 0;

}

bool

gr_cpu::has_3dnowext ()

{

  unsigned int extended_fct_count = cpuid_eax (0x80000000);

  if (extended_fct_count < 0x80000001)

    return false;

  unsigned int extended_features = cpuid_edx (0x80000001);

  return (extended_features & (1 << 30)) != 0;

}

bool

gr_cpu::has_altivec ()

{

  return false;

}

bool

gr_cpu::has_armv7_a ()

{

  return false;

}