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fpu.h revision 1.6 
      1 /*	$NetBSD: fpu.h,v 1.6 2002/05/19 16:55:43 jdolecek Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1996 Wolfgang Solfrank.
      5  * Copyright (C) 1996 TooLs GmbH.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by TooLs GmbH.
     19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 #ifndef	_MACHINE_FPU_H_
     34 #define	_MACHINE_FPU_H_
     35 
     36 #define	FPSCR_FX	0x80000000	/* Exception Summary */
     37 #define	FPSCR_FEX	0x40000000	/* Enabled Exception Summary */
     38 #define	FPSCR_VX	0x20000000	/* Invalid Operation Exception Summary */
     39 #define	FPSCR_OX	0x10000000	/* Overflow Exception */
     40 #define	FPSCR_UX	0x08000000	/* Undrflow Exception */
     41 #define	FPSCR_ZX	0x04000000	/* Zero Divide Exception */
     42 #define	FPSCR_XX	0x02000000	/* Inexact Exception */
     43 #define	FPSCR_VXSNAN	0x01000000	/* Invalid Op (NAN) */
     44 #define	FPSCR_VXISI	0x00800000	/* Invalid Op (INF-INF) */
     45 #define	FPSCR_VXIDI	0x00400000	/* Invalid Op (INF/INF) */
     46 #define	FPSCR_VXZDZ	0x00200000	/* Invalid Op (0/0) */
     47 #define	FPSCR_VXIMZ	0x00100000	/* Invalid Op (INFx0) */
     48 #define	FPSCR_VXVC	0x00080000	/* Invalid Compare Op */
     49 #define	FPSCR_FR	0x00040000	/* Fraction Rounded */
     50 #define	FPSCR_FI	0x00020000	/* Fraction Inexact */
     51 #define	FPSCR_FPRF	0x0001f000
     52 #define	FPSCR_C		0x00010000	/* FP Class Descriptor */
     53 #define	FPSCR_FPCC	0x0000f000
     54 #define	FPSCR_FL	0x00008000	/* < */
     55 #define	FPSCR_FG	0x00004000	/* > */
     56 #define	FPSCR_FE	0x00002000	/* == */
     57 #define	FPSCR_FU	0x00001000	/* unordered */
     58 #define	FPSCR_VXSOFT	0x00000400	/* Software Invalid Exception */
     59 #define	FPSCR_VXSQRT	0x00000200	/* Invalid Sqrt Exception */
     60 #define	FPSCR_VXCVI	0x00000100	/* Invalid Op Integer Cvt Exception */
     61 #define	FPSCR_VE	0x00000080	/* Invalid Op Exception Enable */
     62 #define	FPSCR_OE	0x00000040	/* Overflow Exception Enable */
     63 #define	FPSCR_UE	0x00000020	/* Underflow Exception Enable */
     64 #define	FPSCR_ZE	0x00000010	/* Zero Divide Exception Enable */
     65 #define	FPSCR_XE	0x00000008	/* Inexact Exception Enable */
     66 #define	FPSCR_NI	0x00000004	/* Non-IEEE Mode Enable */
     67 #define	FPSCR_RN	0x00000003
     68 
     69 #ifdef _KERNEL
     70 
     71 #if defined(_KERNEL_OPT)
     72 #include "opt_ppcarch.h"
     73 #endif
     74 
     75 /* List of PowerPC architectures that support FPUs. */
     76 #if defined(PPC_MPC6XX)
     77 #define PPC_HAVE_FPU
     78 
     79 void	enable_fpu(struct proc *);
     80 void	save_fpu(struct proc *);
     81 void	save_fpu_proc(struct proc *);
     82 #endif /* PPC_HAVE_FPU */
     83 #endif /* _KERNEL */
     84 
     85 #endif	/* _MACHINE_FPU_H_ */
     86