/* This is the machine-specific part for a SPARC
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of Gforth.
Gforth 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "32bit.h"
#if !defined(USE_TOS) && !defined(USE_NO_TOS)
#define USE_TOS
#endif
#if !defined(INDIRECT_THREADED) && !defined(DIRECT_THREADED)
#define DIRECT_THREADED
#endif
#define FLUSH_ICACHE(addr,size) \
({void *_addr=(addr); void *_end=_addr+((Cell)(size)); \
for (_addr=((long)_addr)&~7; _addr<_end; _addr += 8) \
asm("iflush %0+0"::"r"(_addr)); \
})
/* the +0 in the iflush instruction is needed by gas */
#ifdef DIRECT_THREADED
#ifndef WORDS_BIGENDIAN
#error Direct threading only supported for big-endian SPARCs.
/* little endian SPARCs still store instructions in big-endian format,
so you would have to reverse the instructions stores in the following
*/
#endif
/* PFA gives the parameter field address corresponding to a cfa */
#define PFA(cfa) (((Cell *)cfa)+2)
/* PFA1 is a special version for use just after a NEXT1 */
/* the improvement here is that we may destroy cfa before using PFA1 */
#define PFA1(cfa) PFA(cfa)
#ifdef undefined
#define PFA1(cfa) /* PFA(cfa) */ \
({register Cell *pfa asm("%o7"); \
pfa+2; })
#endif
/* CODE_ADDRESS is the address of the code jumped to through the code field */
#define CODE_ADDRESS(cfa) ({unsigned _cfa = (unsigned)(cfa); \
(Label)(_cfa+((*(unsigned *)_cfa)<<2)-4);})
/* MAKE_CF creates an appropriate code field at the cfa; ca is the code address */
/* we use call, since 'branch always' only has 22 bits displacement */
#define MAKE_CF(cfa,ca) ({long *_cfa = (long *)(cfa); \
unsigned _ca = (unsigned)(ca); \
_cfa[0] = 0x40000000|((_ca+4-(unsigned)_cfa)>>2); /* CALL ca */ \
_cfa[1] = *(long *)_ca; /* delay slot */})
/* this is the point where the does code starts if label points to the
* jump dodoes */
/* the +4 is due to the fact, that the does_cf jumps directly to the
code address, whereas CODE_ADDRESS expects a jump to
code_address+4, and corrects for that (which is countercorrected by
the +4) */
#define DOES_CODE(label) ((Xt *)(CODE_ADDRESS(label)+4+DOES_HANDLER_SIZE))
/* this is a special version of DOES_CODE for use in dodoes */
#define DOES_CODE1(label) DOES_CODE(label)
#ifdef undefined
#define DOES_CODE1(label) ({register Xt *_does_code asm("%o7"); \
_does_code+2; })
#endif
/* this stores a call dodoes at addr */
#define MAKE_DOES_HANDLER(addr) MAKE_CF(addr,symbols[DODOES])
#define DOES_HANDLER_SIZE 8
#define MAKE_DOES_CF(addr,doesp) ({long *_addr = (long *)(addr); \
unsigned _doesp = (unsigned)(doesp); \
_addr[0] = 0x40000000|((_doesp-8-(unsigned)_addr)>>2); /* CALL doesp-8 */ \
_addr[1] = 0x01000000; /* nop */})
#endif
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