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/*
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    NetWinder Floating Point Emulator
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    (c) Rebel.com, 1998-1999
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    Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
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    This program is free software; you can redistribute it and/or modify
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    it under the terms of the GNU General Public License as published by
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    the Free Software Foundation; either version 2 of the License, or
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    (at your option) any later version.
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    This program is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
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    along with this program; if not, write to the Free Software
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    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __FPA11_H__
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#define __FPA11_H__
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <cpu.h>
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#define GET_FPA11() (qemufpa)
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/*
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 * The processes registers are always at the very top of the 8K
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 * stack+task struct.  Use the same method as 'current' uses to
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 * reach them.
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 */
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extern CPUARMState *user_registers;
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#define GET_USERREG() (user_registers)
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/* Need task_struct */
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//#include <linux/sched.h>
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/* includes */
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#include "fpsr.h"                /* FP control and status register definitions */
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#include "softfloat.h"
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#define                typeNone                0x00
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#define                typeSingle                0x01
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#define                typeDouble                0x02
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#define                typeExtended                0x03
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/*
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 * This must be no more and no less than 12 bytes.
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 */
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typedef union tagFPREG {
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   floatx80 fExtended;
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   float64  fDouble;
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   float32  fSingle;
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} FPREG;
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/*
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 * FPA11 device model.
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 *
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 * This structure is exported to user space.  Do not re-order.
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 * Only add new stuff to the end, and do not change the size of
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 * any element.  Elements of this structure are used by user
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 * space, and must match struct user_fp in include/asm-arm/user.h.
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 * We include the byte offsets below for documentation purposes.
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 *
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 * The size of this structure and FPREG are checked by fpmodule.c
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 * on initialisation.  If the rules have been broken, NWFPE will
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 * not initialise.
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 */
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typedef struct tagFPA11 {
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/*   0 */  FPREG fpreg[8];                /* 8 floating point registers */
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/*  96 */  FPSR fpsr;                        /* floating point status register */
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/* 100 */  FPCR fpcr;                        /* floating point control register */
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/* 104 */  unsigned char fType[8];        /* type of floating point value held in
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                                           floating point registers.  One of none
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                                           single, double or extended. */
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/* 112 */  int initflag;                /* this is special.  The kernel guarantees
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                                           to set it to 0 when a thread is launched,
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                                           so we can use it to detect whether this
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                                           instance of the emulator needs to be
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                                           initialised. */
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    float_status fp_status;      /* QEMU float emulator status */
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} FPA11;
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extern FPA11* qemufpa;
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extern void resetFPA11(void);
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extern void SetRoundingMode(const unsigned int);
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extern void SetRoundingPrecision(const unsigned int);
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static inline unsigned int readRegister(unsigned int reg)
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{
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    return (user_registers->regs[(reg)]);
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}
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static inline void writeRegister(unsigned int x, unsigned int y)
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{
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#if 0
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        printf("writing %d to r%d\n",y,x);
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#endif
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        user_registers->regs[(x)]=(y);
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}
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static inline void writeConditionCodes(unsigned int x)
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{
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        cpsr_write(user_registers,x,CPSR_NZCV);
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}
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#define REG_PC 15
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unsigned int EmulateAll(unsigned int opcode, FPA11* qfpa, CPUARMState* qregs);
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/* included only for get_user/put_user macros */
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#include "qemu.h"
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#endif