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/****************************************************************************
*
* Realmode X86 Emulator Library
*
* Copyright (C) 1996-1999 SciTech Software, Inc.
* Copyright (C) David Mosberger-Tang
* Copyright (C) 1999 Egbert Eich
*
* ========================================================================
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of the authors not be used
* in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The authors makes no
* representations about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
* ========================================================================
*
* Language: ANSI C
* Environment: Any
* Developer: Kendall Bennett
*
* Description: Header file for FPU register definitions.
*
****************************************************************************/
/* $XFree86: xc/extras/x86emu/include/x86emu/fpu_regs.h,v 1.2 2003/10/22 20:03:05 tsi Exp $ */
#ifndef __X86EMU_FPU_REGS_H
#define __X86EMU_FPU_REGS_H
#ifdef X86_FPU_SUPPORT
/* Basic 8087 register can hold any of the following values: */
union x86_fpu_reg_u {
s8 tenbytes[10];
double dval;
float fval;
s16 sval;
s32 lval;
};
struct x86_fpu_reg {
union x86_fpu_reg_u reg;
char tag;
};
/*
* Since we are not going to worry about the problems of aliasing
* registers, every time a register is modified, its result type is
* set in the tag fields for that register. If some operation
* attempts to access the type in a way inconsistent with its current
* storage format, then we flag the operation. If common, we'll
* attempt the conversion.
*/
#define X86_FPU_VALID 0x80
#define X86_FPU_REGTYP(r) ((r) & 0x7F)
#define X86_FPU_WORD 0x0
#define X86_FPU_SHORT 0x1
#define X86_FPU_LONG 0x2
#define X86_FPU_FLOAT 0x3
#define X86_FPU_DOUBLE 0x4
#define X86_FPU_LDBL 0x5
#define X86_FPU_BSD 0x6
#define X86_FPU_STKTOP 0
struct x86_fpu_registers {
struct x86_fpu_reg x86_fpu_stack[8];
int x86_fpu_flags;
int x86_fpu_config; /* rounding modes, etc. */
short x86_fpu_tos, x86_fpu_bos;
};
/*
* There are two versions of the following macro.
*
* One version is for opcode D9, for which there are more than 32
* instructions encoded in the second byte of the opcode.
*
* The other version, deals with all the other 7 i87 opcodes, for
* which there are only 32 strings needed to describe the
* instructions.
*/
#endif /* X86_FPU_SUPPORT */
#ifdef DEBUG
# define DECODE_PRINTINSTR32(t,mod,rh,rl) \
DECODE_PRINTF(t[(mod<<3)+(rh)]);
# define DECODE_PRINTINSTR256(t,mod,rh,rl) \
DECODE_PRINTF(t[(mod<<6)+(rh<<3)+(rl)]);
#else
# define DECODE_PRINTINSTR32(t,mod,rh,rl)
# define DECODE_PRINTINSTR256(t,mod,rh,rl)
#endif
#endif /* __X86EMU_FPU_REGS_H */
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