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Diffstat (limited to 'sim/ppc/altivec_registers.h')
-rw-r--r-- | sim/ppc/altivec_registers.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/sim/ppc/altivec_registers.h b/sim/ppc/altivec_registers.h new file mode 100644 index 0000000..923f5c4 --- /dev/null +++ b/sim/ppc/altivec_registers.h @@ -0,0 +1,63 @@ +/* Altivec registers, for PSIM, the PowerPC simulator. + + Copyright 2003 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 2 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, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* 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 |