38cd29ebd7
produced numerous problems in the past, including the fact that x86emu doesn't work in v3 anymore even though it lives in the v3 repository. Since this is a cross-repository move, keeping the history in the v2 tree would make life hard for everone. So check the v3 repository for x86emu history since the merger. The his commit is based on an svn export of r1175 of the coreboot-v3 repository. Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Patrick Georgi <patrick.georgi@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4532 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
/****************************************************************************
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*
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* Realmode X86 Emulator Library
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*
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* Copyright (C) 1996-1999 SciTech Software, Inc.
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* Copyright (C) David Mosberger-Tang
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* Copyright (C) 1999 Egbert Eich
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*
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* ========================================================================
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and that
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* both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of the authors not be used
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* in advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. The authors makes no
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* representations about the suitability of this software for any purpose.
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* It is provided "as is" without express or implied warranty.
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*
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* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
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* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* ========================================================================
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*
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* Language: ANSI C
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* Environment: Any
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* Developer: Kendall Bennett
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*
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* Description: Header file for FPU register definitions.
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*
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****************************************************************************/
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#ifndef __X86EMU_FPU_REGS_H
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#define __X86EMU_FPU_REGS_H
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#ifdef X86_FPU_SUPPORT
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#pragma pack(1)
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/* Basic 8087 register can hold any of the following values: */
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union x86_fpu_reg_u {
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s8 tenbytes[10];
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double dval;
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float fval;
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s16 sval;
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s32 lval;
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};
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struct x86_fpu_reg {
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union x86_fpu_reg_u reg;
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char tag;
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};
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/*
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* Since we are not going to worry about the problems of aliasing
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* registers, every time a register is modified, its result type is
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* set in the tag fields for that register. If some operation
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* attempts to access the type in a way inconsistent with its current
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* storage format, then we flag the operation. If common, we'll
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* attempt the conversion.
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*/
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#define X86_FPU_VALID 0x80
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#define X86_FPU_REGTYP(r) ((r) & 0x7F)
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#define X86_FPU_WORD 0x0
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#define X86_FPU_SHORT 0x1
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#define X86_FPU_LONG 0x2
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#define X86_FPU_FLOAT 0x3
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#define X86_FPU_DOUBLE 0x4
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#define X86_FPU_LDBL 0x5
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#define X86_FPU_BSD 0x6
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#define X86_FPU_STKTOP 0
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struct x86_fpu_registers {
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struct x86_fpu_reg x86_fpu_stack[8];
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int x86_fpu_flags;
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int x86_fpu_config; /* rounding modes, etc. */
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short x86_fpu_tos, x86_fpu_bos;
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};
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#pragma pack()
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/*
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* There are two versions of the following macro.
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*
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* One version is for opcode D9, for which there are more than 32
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* instructions encoded in the second byte of the opcode.
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*
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* The other version, deals with all the other 7 i87 opcodes, for
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* which there are only 32 strings needed to describe the
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* instructions.
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*/
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#endif /* X86_FPU_SUPPORT */
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#ifdef CONFIG_DEBUG
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# define DECODE_PRINTINSTR32(t,mod,rh,rl) \
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DECODE_PRINTF(t[(mod<<3)+(rh)]);
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# define DECODE_PRINTINSTR256(t,mod,rh,rl) \
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DECODE_PRINTF(t[(mod<<6)+(rh<<3)+(rl)]);
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#else
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# define DECODE_PRINTINSTR32(t,mod,rh,rl)
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# define DECODE_PRINTINSTR256(t,mod,rh,rl)
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#endif
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#endif /* __X86EMU_FPU_REGS_H */
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