1/* $NetBSD: fpu.h,v 1.25 2020/07/15 09:19:49 rin 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 34#ifndef _POWERPC_FPU_H_ 35#define _POWERPC_FPU_H_ 36 37#define FPSCR_FX 0x80000000 /* Exception Summary */ 38#define FPSCR_FEX 0x40000000 /* Enabled Exception Summary */ 39#define FPSCR_VX 0x20000000 /* Invalid Operation Exception Summary */ 40#define FPSCR_OX 0x10000000 /* Overflow Exception */ 41#define FPSCR_UX 0x08000000 /* Undrflow Exception */ 42#define FPSCR_ZX 0x04000000 /* Zero Divide Exception */ 43#define FPSCR_XX 0x02000000 /* Inexact Exception */ 44#define FPSCR_VXSNAN 0x01000000 /* Invalid Op (NAN) */ 45#define FPSCR_VXISI 0x00800000 /* Invalid Op (INF-INF) */ 46#define FPSCR_VXIDI 0x00400000 /* Invalid Op (INF/INF) */ 47#define FPSCR_VXZDZ 0x00200000 /* Invalid Op (0/0) */ 48#define FPSCR_VXIMZ 0x00100000 /* Invalid Op (INFx0) */ 49#define FPSCR_VXVC 0x00080000 /* Invalid Compare Op */ 50#define FPSCR_FR 0x00040000 /* Fraction Rounded */ 51#define FPSCR_FI 0x00020000 /* Fraction Inexact */ 52#define FPSCR_FPRF 0x0001f000 53#define FPSCR_C 0x00010000 /* FP Class Descriptor */ 54#define FPSCR_FPCC 0x0000f000 55#define FPSCR_FL 0x00008000 /* < */ 56#define FPSCR_FG 0x00004000 /* > */ 57#define FPSCR_FE 0x00002000 /* == */ 58#define FPSCR_FU 0x00001000 /* unordered */ 59#define FPSCR_VXSOFT 0x00000400 /* Software Invalid Exception */ 60#define FPSCR_VXSQRT 0x00000200 /* Invalid Sqrt Exception */ 61#define FPSCR_VXCVI 0x00000100 /* Invalid Op Integer Cvt Exception */ 62#define FPSCR_VE 0x00000080 /* Invalid Op Exception Enable */ 63#define FPSCR_OE 0x00000040 /* Overflow Exception Enable */ 64#define FPSCR_UE 0x00000020 /* Underflow Exception Enable */ 65#define FPSCR_ZE 0x00000010 /* Zero Divide Exception Enable */ 66#define FPSCR_XE 0x00000008 /* Inexact Exception Enable */ 67#define FPSCR_NI 0x00000004 /* Non-IEEE Mode Enable */ 68#define FPSCR_RN 0x00000003 69 70#ifdef _KERNEL 71 72#ifdef _KERNEL_OPT 73#include "opt_ppcarch.h" 74#endif 75 76#include <sys/pcu.h> 77#include <powerpc/mcontext.h> 78 79struct lwp; 80bool fpu_used_p(struct lwp *); 81void fpu_mark_used(struct lwp *); 82 83void fpu_restore_from_mcontext(struct lwp *, const mcontext_t *); 84bool fpu_save_to_mcontext(struct lwp *, mcontext_t *, unsigned int *); 85 86int fpu_get_fault_code(void); 87 88extern const pcu_ops_t fpu_ops; 89 90/* List of PowerPC architectures that support FPUs. */ 91#if defined(PPC_OEA) || defined (PPC_OEA64) || defined (PPC_OEA64_BRIDGE) 92#define PPC_HAVE_FPU 93 94struct fpreg; 95 96static __inline void 97fpu_load(void) 98{ 99 pcu_load(&fpu_ops); 100} 101 102static __inline void 103fpu_save(lwp_t *l) 104{ 105 pcu_save(&fpu_ops, l); 106} 107 108static __inline void 109fpu_discard(lwp_t *l) 110{ 111 pcu_discard(&fpu_ops, l, false); 112} 113 114void fpu_load_from_fpreg(const struct fpreg *); 115void fpu_unload_to_fpreg(struct fpreg *); 116 117#endif /* PPC_HAVE_FPU */ 118#endif /* _KERNEL */ 119 120#endif /* _POWERPC_FPU_H_ */ 121