fpu.h revision 1.16
1/* $NetBSD: fpu.h,v 1.16 2007/10/17 19:56:40 garbled 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 _POWERPC_FPU_H_ 34#define _POWERPC_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#include "opt_multiprocessor.h" 74#endif 75 76/* List of PowerPC architectures that support FPUs. */ 77#if defined(PPC_OEA) || defined (PPC_OEA64) || defined (PPC_OEA64_BRIDGE) 78#define PPC_HAVE_FPU 79 80#define FPU_SAVE 0 81#define FPU_DISCARD 1 82 83void enable_fpu(void); 84void save_fpu_cpu(void); 85void save_fpu_lwp(struct lwp *, int /*discard*/); 86int get_fpu_fault_code(void); 87#endif /* PPC_HAVE_FPU */ 88#endif /* _KERNEL */ 89 90#endif /* _POWERPC_FPU_H_ */ 91