libhd
5.0
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00001 /**************************************************************************** 00002 * 00003 * Realmode X86 Emulator Library 00004 * 00005 * Copyright (C) 1996-1999 SciTech Software, Inc. 00006 * Copyright (C) David Mosberger-Tang 00007 * Copyright (C) 1999 Egbert Eich 00008 * 00009 * ======================================================================== 00010 * 00011 * Permission to use, copy, modify, distribute, and sell this software and 00012 * its documentation for any purpose is hereby granted without fee, 00013 * provided that the above copyright notice appear in all copies and that 00014 * both that copyright notice and this permission notice appear in 00015 * supporting documentation, and that the name of the authors not be used 00016 * in advertising or publicity pertaining to distribution of the software 00017 * without specific, written prior permission. The authors makes no 00018 * representations about the suitability of this software for any purpose. 00019 * It is provided "as is" without express or implied warranty. 00020 * 00021 * THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 00022 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 00023 * EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 00024 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF 00025 * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR 00026 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 00027 * PERFORMANCE OF THIS SOFTWARE. 00028 * 00029 * ======================================================================== 00030 * 00031 * Language: ANSI C 00032 * Environment: Any 00033 * Developer: Kendall Bennett 00034 * 00035 * Description: Header file for FPU register definitions. 00036 * 00037 ****************************************************************************/ 00038 /* $XFree86: xc/extras/x86emu/include/x86emu/fpu_regs.h,v 1.2 2003/10/22 20:03:05 tsi Exp $ */ 00039 00040 #ifndef __X86EMU_FPU_REGS_H 00041 #define __X86EMU_FPU_REGS_H 00042 00043 #ifdef X86_FPU_SUPPORT 00044 00045 #ifdef PACK 00046 # pragma PACK 00047 #endif 00048 00049 /* Basic 8087 register can hold any of the following values: */ 00050 00051 union x86_fpu_reg_u { 00052 s8 tenbytes[10]; 00053 double dval; 00054 float fval; 00055 s16 sval; 00056 s32 lval; 00057 }; 00058 00059 struct x86_fpu_reg { 00060 union x86_fpu_reg_u reg; 00061 char tag; 00062 }; 00063 00064 /* 00065 * Since we are not going to worry about the problems of aliasing 00066 * registers, every time a register is modified, its result type is 00067 * set in the tag fields for that register. If some operation 00068 * attempts to access the type in a way inconsistent with its current 00069 * storage format, then we flag the operation. If common, we'll 00070 * attempt the conversion. 00071 */ 00072 00073 #define X86_FPU_VALID 0x80 00074 #define X86_FPU_REGTYP(r) ((r) & 0x7F) 00075 00076 #define X86_FPU_WORD 0x0 00077 #define X86_FPU_SHORT 0x1 00078 #define X86_FPU_LONG 0x2 00079 #define X86_FPU_FLOAT 0x3 00080 #define X86_FPU_DOUBLE 0x4 00081 #define X86_FPU_LDBL 0x5 00082 #define X86_FPU_BSD 0x6 00083 00084 #define X86_FPU_STKTOP 0 00085 00086 struct x86_fpu_registers { 00087 struct x86_fpu_reg x86_fpu_stack[8]; 00088 int x86_fpu_flags; 00089 int x86_fpu_config; /* rounding modes, etc. */ 00090 short x86_fpu_tos, x86_fpu_bos; 00091 }; 00092 00093 #ifdef END_PACK 00094 # pragma END_PACK 00095 #endif 00096 00097 /* 00098 * There are two versions of the following macro. 00099 * 00100 * One version is for opcode D9, for which there are more than 32 00101 * instructions encoded in the second byte of the opcode. 00102 * 00103 * The other version, deals with all the other 7 i87 opcodes, for 00104 * which there are only 32 strings needed to describe the 00105 * instructions. 00106 */ 00107 00108 #endif /* X86_FPU_SUPPORT */ 00109 00110 #ifdef DEBUG 00111 # define DECODE_PRINTINSTR32(t,mod,rh,rl) \ 00112 DECODE_PRINTF(t[(mod<<3)+(rh)]); 00113 # define DECODE_PRINTINSTR256(t,mod,rh,rl) \ 00114 DECODE_PRINTF(t[(mod<<6)+(rh<<3)+(rl)]); 00115 #else 00116 # define DECODE_PRINTINSTR32(t,mod,rh,rl) 00117 # define DECODE_PRINTINSTR256(t,mod,rh,rl) 00118 #endif 00119 00120 #endif /* __X86EMU_FPU_REGS_H */