1/**************************************************************************** 2* 3* Realmode X86 Emulator Library 4* 5* Copyright (C) 1996-1999 SciTech Software, Inc. 6* Copyright (C) David Mosberger-Tang 7* Copyright (C) 1999 Egbert Eich 8* 9* ======================================================================== 10* 11* Permission to use, copy, modify, distribute, and sell this software and 12* its documentation for any purpose is hereby granted without fee, 13* provided that the above copyright notice appear in all copies and that 14* both that copyright notice and this permission notice appear in 15* supporting documentation, and that the name of the authors not be used 16* in advertising or publicity pertaining to distribution of the software 17* without specific, written prior permission. The authors makes no 18* representations about the suitability of this software for any purpose. 19* It is provided "as is" without express or implied warranty. 20* 21* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 22* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 23* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 24* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF 25* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR 26* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 27* PERFORMANCE OF THIS SOFTWARE. 28* 29* ======================================================================== 30* 31* Language: ANSI C 32* Environment: Any 33* Developer: Kendall Bennett 34* 35* Description: Header file for FPU register definitions. 36* 37****************************************************************************/ 38 39#ifndef __X86EMU_FPU_REGS_H 40#define __X86EMU_FPU_REGS_H 41 42#ifdef X86_FPU_SUPPORT 43 44#ifdef PACK 45#pragma PACK 46#endif 47 48/* Basic 8087 register can hold any of the following values: */ 49 50union x86_fpu_reg_u { 51 s8 tenbytes[10]; 52 double dval; 53 float fval; 54 s16 sval; 55 s32 lval; 56}; 57 58struct x86_fpu_reg { 59 union x86_fpu_reg_u reg; 60 char tag; 61}; 62 63/* 64 * Since we are not going to worry about the problems of aliasing 65 * registers, every time a register is modified, its result type is 66 * set in the tag fields for that register. If some operation 67 * attempts to access the type in a way inconsistent with its current 68 * storage format, then we flag the operation. If common, we'll 69 * attempt the conversion. 70 */ 71 72#define X86_FPU_VALID 0x80 73#define X86_FPU_REGTYP(r) ((r) & 0x7F) 74 75#define X86_FPU_WORD 0x0 76#define X86_FPU_SHORT 0x1 77#define X86_FPU_LONG 0x2 78#define X86_FPU_FLOAT 0x3 79#define X86_FPU_DOUBLE 0x4 80#define X86_FPU_LDBL 0x5 81#define X86_FPU_BSD 0x6 82 83#define X86_FPU_STKTOP 0 84 85struct x86_fpu_registers { 86 struct x86_fpu_reg x86_fpu_stack[8]; 87 int x86_fpu_flags; 88 int x86_fpu_config; /* rounding modes, etc. */ 89 short x86_fpu_tos, x86_fpu_bos; 90}; 91 92#ifdef END_PACK 93#pragma END_PACK 94#endif 95 96/* 97 * There are two versions of the following macro. 98 * 99 * One version is for opcode D9, for which there are more than 32 100 * instructions encoded in the second byte of the opcode. 101 * 102 * The other version, deals with all the other 7 i87 opcodes, for 103 * which there are only 32 strings needed to describe the 104 * instructions. 105 */ 106 107#endif /* X86_FPU_SUPPORT */ 108 109#ifdef DEBUG 110#define DECODE_PRINTINSTR32(t,mod,rh,rl) \ 111 DECODE_PRINTF(t[(mod<<3)+(rh)]); 112#define DECODE_PRINTINSTR256(t,mod,rh,rl) \ 113 DECODE_PRINTF(t[(mod<<6)+(rh<<3)+(rl)]); 114#else 115#define DECODE_PRINTINSTR32(t,mod,rh,rl) 116#define DECODE_PRINTINSTR256(t,mod,rh,rl) 117#endif 118 119#endif /* __X86EMU_FPU_REGS_H */ 120