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/* Target-dependent definitions for Intel x86 running DJGPP.
Copyright 1995, 1996, 1997 Free Software Foundation, Inc.
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. */
#include "i386/tm-i386v.h"
/* Number of machine registers. */
#undef NUM_FREGS
#define NUM_FREGS 15
#undef NUM_REGS
#define NUM_REGS (16+NUM_FREGS)
/* Initializer for an array of names of registers. There should be
NUM_REGS strings in this initializer. */
/* The order of the first 8 registers must match the compiler's
numbering scheme (which is the same as the 386 scheme). */
#undef REGISTER_NAMES
#define REGISTER_NAMES { "eax", "ecx", "edx", "ebx", \
"esp", "ebp", "esi", "edi", \
"eip", "eflags","cs", "ss", \
"ds", "es", "fs", "gs", \
"st0", "st1", "st2", "st3", \
"st4", "st5", "st6", "st7", \
"fctrl","fstat", "ftag", "fcs", \
"fopsel","fip", "fopoff" }
#undef FP_REGNUM
#define FP_REGNUM 5 /* (ebp) Contains addr of stack frame */
#undef SP_REGNUM
#define SP_REGNUM 4 /* (usp) Contains address of top of stack */
#undef PS_REGNUM
#define PS_REGNUM 9 /* (ps) Contains processor status */
#undef PC_REGNUM
#define PC_REGNUM 8 /* (eip) Contains program counter */
#undef FP0_REGNUM
#define FP0_REGNUM 16 /* Floating point register 0 */
#undef FPC_REGNUM
#define FPC_REGNUM 24 /* 80387 control register */
#undef FPCWD_REGNUM
#define FPCWD_REGNUM FPC_REGNUM
#undef FPSWD_REGNUM
#define FPSWD_REGNUM 25 /* 80387 status register */
#undef FPTWD_REGNUM
#define FPTWD_REGNUM 26 /* 80387 tag register */
#undef FPIPO_REGNUM
#define FPIPO_REGNUM 29 /* 80387 instruction pointer offset reg */
#undef FPIPS_REGNUM
#define FPIPS_REGNUM 27 /* 80387 instruction pointer selector reg */
#undef FPOOS_REGNUM
#define FPOOS_REGNUM 30 /* 80387 operand pointer offset reg */
#undef FPOPS_REGNUM
#define FPOPS_REGNUM 28 /* 80387 operand pointer selector reg */
/* Total amount of space needed to store our copies of the machine's
register state, the array `registers'. */
#undef REGISTER_BYTES
#define REGISTER_BYTES (10*4 + 6*2 + 8*10 + 5*2 + 2*4)
/* Index within `registers' of the first byte of the space for
register N. */
#undef REGISTER_BYTE
#define REGBYTE_0 0
#define REGBYTE_10 (REGBYTE_0+10*4)
#define REGBYTE_16 (REGBYTE_10+6*2)
#define REGBYTE_24 (REGBYTE_16+8*10)
#define REGBYTE_29 (REGBYTE_24+5*2)
#define REGISTER_BYTE(N) (((N) < 10) ? (N) * 4 : \
(N) < 16 ? REGBYTE_10 +((N) - 10) * 2 : \
(N) < 24 ? REGBYTE_16 +((N) - 16) * 10 : \
(N) < 29 ? REGBYTE_24 +((N) - 24) * 2 : \
REGBYTE_29 + ((N) - 29) * 4)
/* Number of bytes of storage in the actual machine representation
for register N. */
#undef REGISTER_RAW_SIZE
#define REGISTER_RAW_SIZE(N) ((N) < 10 ? 4 : (N) < 16 ? 2 : (N) < 24 ? 10 : \
(N) < 29 ? 2 : 4)
/* Number of bytes of storage in the program's representation
for register N. */
#undef REGISTER_VIRTUAL_SIZE
#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
/* Largest value REGISTER_RAW_SIZE can have. */
#undef MAX_REGISTER_RAW_SIZE
#define MAX_REGISTER_RAW_SIZE 10
/* Largest value REGISTER_VIRTUAL_SIZE can have. */
#undef MAX_REGISTER_VIRTUAL_SIZE
#define MAX_REGISTER_VIRTUAL_SIZE 10
/* Nonzero if register N requires conversion
from raw format to virtual format. */
#undef REGISTER_CONVERTIBLE
#define REGISTER_CONVERTIBLE(N) ((N) < FP0_REGNUM ? 0 :\
(N) < FPC_REGNUM ? 1 : 0)
/* The host and target are i386 machines and the compiler supports
long doubles. Long doubles on the host therefore have the same
layout as a 387 FPU stack register. */
#if defined(HAVE_LONG_DOUBLE) && defined(HOST_I386)
#undef LD_I387
#define LD_I387
#endif
/* Allow floating point numbers to be specified by a raw long double
10 hex bytes number, e.g. 1.0 can be input as
0x3fff8000000000000000 */
#ifdef LD_I387
#define HEX_LONG_DOUBLE_INPUT(base,p,len,target) \
((base) == 16 && (len) == 20 \
&& i387_hex_long_double_input ((p), (target)))
#endif
extern int i387_hex_long_double_input (char *p, long double *putithere);
#undef REGISTER_CONVERT_TO_VIRTUAL
#ifdef LD_I387
#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
{ \
if (TYPE == REGISTER_VIRTUAL_TYPE (REGNUM)) \
{ \
memcpy (TO, FROM, TYPE_LENGTH (TYPE)); \
} \
else \
{ \
long double val = *((long double *)FROM); \
store_floating ((TO), TYPE_LENGTH (TYPE), val); \
} \
}
#else
/* Convert data from raw format for register REGNUM in buffer FROM to
virtual format with type TYPE in buffer TO. */
#define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
{ \
double val; \
i387_to_double ((FROM), (char *)&val); \
store_floating ((TO), TYPE_LENGTH (TYPE), val); \
}
#endif
extern void i387_to_double PARAMS ((char *, char *));
#undef REGISTER_CONVERT_TO_RAW
#ifdef LD_I387
#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
{ \
if (TYPE == REGISTER_VIRTUAL_TYPE (REGNUM)) \
{ \
memcpy (TO, FROM, TYPE_LENGTH (TYPE)); \
} \
else \
{ \
long double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
*((long double *)TO) = val; \
} \
}
#else
#define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
{ \
double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
double_to_i387((char *)&val, (TO)); \
}
#endif
extern void double_to_i387 PARAMS ((char *, char *));
/* Return the GDB type object for the "standard" data type of data in
register N. */
#undef REGISTER_VIRTUAL_TYPE
#ifdef LD_I387
#define REGISTER_VIRTUAL_TYPE(N) \
((N < FP0_REGNUM) ? builtin_type_int : \
(N < FPC_REGNUM) ? builtin_type_long_double : builtin_type_int)
#else
#define REGISTER_VIRTUAL_TYPE(N) \
((N < FP0_REGNUM) ? builtin_type_int : \
(N < FPC_REGNUM) ? builtin_type_double : builtin_type_int)
#endif
#undef TARGET_LONG_DOUBLE_BIT
#define TARGET_LONG_DOUBLE_BIT 96
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