b9a21c3c91c47e090316e28d759194e46628ed49vboxsync/****************************************************************************
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* Realmode X86 Emulator Library
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* Copyright (C) 1996-1999 SciTech Software, Inc.
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* Copyright (C) David Mosberger-Tang
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* Copyright (C) 1999 Egbert Eich
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* ========================================================================
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* Permission to use, copy, modify, distribute, and sell this software and
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* its documentation for any purpose is hereby granted without fee,
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* provided that the above copyright notice appear in all copies and that
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* both that copyright notice and this permission notice appear in
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* supporting documentation, and that the name of the authors not be used
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* in advertising or publicity pertaining to distribution of the software
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* without specific, written prior permission. The authors makes no
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* representations about the suitability of this software for any purpose.
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* It is provided "as is" without express or implied warranty.
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* PERFORMANCE OF THIS SOFTWARE.
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* ========================================================================
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* Language: ANSI C
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* Environment: Any
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* Developer: Kendall Bennett
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync* Description: Header file for FPU register definitions.
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync****************************************************************************/
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#ifndef __X86EMU_FPU_REGS_H
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define __X86EMU_FPU_REGS_H
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#ifdef X86_FPU_SUPPORT
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#ifdef PACK
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync# pragma PACK
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#endif
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync/* Basic 8087 register can hold any of the following values: */
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsyncunion x86_fpu_reg_u {
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync s8 tenbytes[10];
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync double dval;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync float fval;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync s16 sval;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync s32 lval;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync };
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsyncstruct x86_fpu_reg {
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync union x86_fpu_reg_u reg;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync char tag;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync };
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync/*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * Since we are not going to worry about the problems of aliasing
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * registers, every time a register is modified, its result type is
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * set in the tag fields for that register. If some operation
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * attempts to access the type in a way inconsistent with its current
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * storage format, then we flag the operation. If common, we'll
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * attempt the conversion.
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync */
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define X86_FPU_VALID 0x80
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define X86_FPU_REGTYP(r) ((r) & 0x7F)
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define X86_FPU_WORD 0x0
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define X86_FPU_SHORT 0x1
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define X86_FPU_LONG 0x2
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define X86_FPU_FLOAT 0x3
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define X86_FPU_DOUBLE 0x4
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define X86_FPU_LDBL 0x5
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define X86_FPU_BSD 0x6
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#define X86_FPU_STKTOP 0
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsyncstruct x86_fpu_registers {
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync struct x86_fpu_reg x86_fpu_stack[8];
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync int x86_fpu_flags;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync int x86_fpu_config; /* rounding modes, etc. */
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync short x86_fpu_tos, x86_fpu_bos;
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync };
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#ifdef END_PACK
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync# pragma END_PACK
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#endif
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync/*
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * There are two versions of the following macro.
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync *
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * One version is for opcode D9, for which there are more than 32
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * instructions encoded in the second byte of the opcode.
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync *
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * The other version, deals with all the other 7 i87 opcodes, for
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * which there are only 32 strings needed to describe the
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync * instructions.
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync */
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#endif /* X86_FPU_SUPPORT */
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#ifdef DEBUG
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync# define DECODE_PRINTINSTR32(t,mod,rh,rl) \
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync DECODE_PRINTF(t[(mod<<3)+(rh)]);
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync# define DECODE_PRINTINSTR256(t,mod,rh,rl) \
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync DECODE_PRINTF(t[(mod<<6)+(rh<<3)+(rl)]);
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#else
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync# define DECODE_PRINTINSTR32(t,mod,rh,rl)
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync# define DECODE_PRINTINSTR256(t,mod,rh,rl)
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#endif
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync
b9a21c3c91c47e090316e28d759194e46628ed49vboxsync#endif /* __X86EMU_FPU_REGS_H */