8cd24529dc
Nuke struct fpu and use struct fpreg instead (except for the names, they were identical). On MP machines, this will avoid an unneeded IPI to save the register contents that are about to discarded.
94 lines
3.9 KiB
C
94 lines
3.9 KiB
C
/* $NetBSD: fpu.h,v 1.13 2004/04/16 23:58:08 matt Exp $ */
|
|
|
|
/*-
|
|
* Copyright (C) 1996 Wolfgang Solfrank.
|
|
* Copyright (C) 1996 TooLs GmbH.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by TooLs GmbH.
|
|
* 4. The name of TooLs GmbH may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
#ifndef _POWERPC_FPU_H_
|
|
#define _POWERPC_FPU_H_
|
|
|
|
#define FPSCR_FX 0x80000000 /* Exception Summary */
|
|
#define FPSCR_FEX 0x40000000 /* Enabled Exception Summary */
|
|
#define FPSCR_VX 0x20000000 /* Invalid Operation Exception Summary */
|
|
#define FPSCR_OX 0x10000000 /* Overflow Exception */
|
|
#define FPSCR_UX 0x08000000 /* Undrflow Exception */
|
|
#define FPSCR_ZX 0x04000000 /* Zero Divide Exception */
|
|
#define FPSCR_XX 0x02000000 /* Inexact Exception */
|
|
#define FPSCR_VXSNAN 0x01000000 /* Invalid Op (NAN) */
|
|
#define FPSCR_VXISI 0x00800000 /* Invalid Op (INF-INF) */
|
|
#define FPSCR_VXIDI 0x00400000 /* Invalid Op (INF/INF) */
|
|
#define FPSCR_VXZDZ 0x00200000 /* Invalid Op (0/0) */
|
|
#define FPSCR_VXIMZ 0x00100000 /* Invalid Op (INFx0) */
|
|
#define FPSCR_VXVC 0x00080000 /* Invalid Compare Op */
|
|
#define FPSCR_FR 0x00040000 /* Fraction Rounded */
|
|
#define FPSCR_FI 0x00020000 /* Fraction Inexact */
|
|
#define FPSCR_FPRF 0x0001f000
|
|
#define FPSCR_C 0x00010000 /* FP Class Descriptor */
|
|
#define FPSCR_FPCC 0x0000f000
|
|
#define FPSCR_FL 0x00008000 /* < */
|
|
#define FPSCR_FG 0x00004000 /* > */
|
|
#define FPSCR_FE 0x00002000 /* == */
|
|
#define FPSCR_FU 0x00001000 /* unordered */
|
|
#define FPSCR_VXSOFT 0x00000400 /* Software Invalid Exception */
|
|
#define FPSCR_VXSQRT 0x00000200 /* Invalid Sqrt Exception */
|
|
#define FPSCR_VXCVI 0x00000100 /* Invalid Op Integer Cvt Exception */
|
|
#define FPSCR_VE 0x00000080 /* Invalid Op Exception Enable */
|
|
#define FPSCR_OE 0x00000040 /* Overflow Exception Enable */
|
|
#define FPSCR_UE 0x00000020 /* Underflow Exception Enable */
|
|
#define FPSCR_ZE 0x00000010 /* Zero Divide Exception Enable */
|
|
#define FPSCR_XE 0x00000008 /* Inexact Exception Enable */
|
|
#define FPSCR_NI 0x00000004 /* Non-IEEE Mode Enable */
|
|
#define FPSCR_RN 0x00000003
|
|
|
|
#ifdef _KERNEL
|
|
|
|
#if defined(_KERNEL_OPT)
|
|
#include "opt_ppcarch.h"
|
|
#include "opt_multiprocessor.h"
|
|
#endif
|
|
|
|
/* List of PowerPC architectures that support FPUs. */
|
|
#if defined(PPC_OEA)
|
|
#define PPC_HAVE_FPU
|
|
|
|
#define FPU_SAVE 0
|
|
#define FPU_DISCARD 1
|
|
|
|
void enable_fpu(void);
|
|
void save_fpu_cpu(void);
|
|
void save_fpu_lwp(struct lwp *, int /*discard*/);
|
|
int get_fpu_fault_code(void);
|
|
#ifdef MULTIPROCESSOR
|
|
void mp_save_fpu_lwp(struct lwp *);
|
|
#endif
|
|
#endif /* PPC_HAVE_FPU */
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _POWERPC_FPU_H_ */
|