Subversion Repositories openrisc_2011-10-31

/* Altivec registers, for PSIM, the PowerPC simulator.

   Copyright 2003, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

   Contributed by Red Hat Inc; developed under contract from Motorola.

   Written by matthew green <mrg@redhat.com>.

   This file is part of GDB.

   This program 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 of the License, or

   (at your option) any later version.

   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* Manage this as 4 32-bit entities, 8 16-bit entities or 16 8-bit

   entities.  */

typedef union

{

  unsigned8 b[16];

  unsigned16 h[8];

  unsigned32 w[4];

} vreg;

typedef unsigned32 vscreg;

struct altivec_regs {

  /* AltiVec Registers */

  vreg vr[32];

  vscreg vscr;

};

/* AltiVec registers */

#define VR(N)           cpu_registers(processor)->altivec.vr[N]

/* AltiVec vector status and control register */

#define VSCR            cpu_registers(processor)->altivec.vscr

/* AltiVec endian helpers, wrong endian hosts vs targets need to be

   sure to get the right bytes/halfs/words when the order matters.

   Note that many AltiVec instructions do not depend on byte order and

   work on N independant bits of data.  This is only for the

   instructions that actually move data around.  */

#if (WITH_HOST_BYTE_ORDER == BIG_ENDIAN)

#define AV_BINDEX(x)    ((x) & 15)

#define AV_HINDEX(x)    ((x) & 7)

#else

static char endian_b2l_bindex[16] = { 3, 2, 1, 0, 7, 6, 5, 4,

                             11, 10, 9, 8, 15, 14, 13, 12 };

static char endian_b2l_hindex[16] = { 1, 0, 3, 2, 5, 4, 7, 6 };

#define AV_BINDEX(x)    endian_b2l_bindex[(x) & 15]

#define AV_HINDEX(x)    endian_b2l_hindex[(x) & 7]

#endif