| 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 |
|
|---|
| 50 | union x86_fpu_reg_u {
|
|---|
| 51 | s8 tenbytes[10];
|
|---|
| 52 | double dval;
|
|---|
| 53 | float fval;
|
|---|
| 54 | s16 sval;
|
|---|
| 55 | s32 lval;
|
|---|
| 56 | };
|
|---|
| 57 |
|
|---|
| 58 | struct 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 |
|
|---|
| 85 | struct 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 */
|
|---|
