| /**************************************************************************** |
| * |
| * 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. |
| * |
| ****************************************************************************/ |
| |
| #ifndef __X86EMU_FPU_REGS_H |
| #define __X86EMU_FPU_REGS_H |
| |
| #ifdef X86_FPU_SUPPORT |
| |
| #pragma pack(1) |
| |
| /* 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; |
| }; |
| |
| #pragma pack() |
| |
| /* |
| * 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 */ |
| |
| #if CONFIG(X86EMU_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 */ |