1/* Altivec registers, for PSIM, the PowerPC simulator.
2
3   Copyright 2003, 2007 Free Software Foundation, Inc.
4
5   Contributed by Red Hat Inc; developed under contract from Motorola.
6   Written by matthew green <mrg@redhat.com>.
7
8   This file is part of GDB.
9
10   This program is free software; you can redistribute it and/or modify
11   it under the terms of the GNU General Public License as published by
12   the Free Software Foundation; either version 3 of the License, or
13   (at your option) any later version.
14
15   This program is distributed in the hope that it will be useful,
16   but WITHOUT ANY WARRANTY; without even the implied warranty of
17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18   GNU General Public License for more details.
19
20   You should have received a copy of the GNU General Public License
21   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
22
23/* Manage this as 4 32-bit entities, 8 16-bit entities or 16 8-bit
24   entities.  */
25typedef union
26{
27  unsigned8 b[16];
28  unsigned16 h[8];
29  unsigned32 w[4];
30} vreg;
31
32typedef unsigned32 vscreg;
33
34struct altivec_regs {
35  /* AltiVec Registers */
36  vreg vr[32];
37  vscreg vscr;
38};
39
40/* AltiVec registers */
41#define VR(N)		cpu_registers(processor)->altivec.vr[N]
42
43/* AltiVec vector status and control register */
44#define VSCR		cpu_registers(processor)->altivec.vscr
45
46/* AltiVec endian helpers, wrong endian hosts vs targets need to be
47   sure to get the right bytes/halfs/words when the order matters.
48   Note that many AltiVec instructions do not depend on byte order and
49   work on N independant bits of data.  This is only for the
50   instructions that actually move data around.  */
51
52#if (WITH_HOST_BYTE_ORDER == BIG_ENDIAN)
53#define AV_BINDEX(x)	((x) & 15)
54#define AV_HINDEX(x)	((x) & 7)
55#else
56static char endian_b2l_bindex[16] = { 3, 2, 1, 0, 7, 6, 5, 4,
57			     11, 10, 9, 8, 15, 14, 13, 12 };
58static char endian_b2l_hindex[16] = { 1, 0, 3, 2, 5, 4, 7, 6 };
59#define AV_BINDEX(x)	endian_b2l_bindex[(x) & 15]
60#define AV_HINDEX(x)	endian_b2l_hindex[(x) & 7]
61#endif
62