1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 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 * $NetBSD: fpu.h,v 1.2 1999/12/07 15:14:56 danw Exp $ 34 */ 35 36 #ifndef _MACHINE_FPU_H_ 37 #define _MACHINE_FPU_H_ 38 39 #define FPSCR_FX 0x80000000 40 #define FPSCR_FEX 0x40000000 41 #define FPSCR_VX 0x20000000 42 #define FPSCR_OX 0x10000000 43 #define FPSCR_UX 0x08000000 44 #define FPSCR_ZX 0x04000000 45 #define FPSCR_XX 0x02000000 46 #define FPSCR_VXSNAN 0x01000000 47 #define FPSCR_VXISI 0x00800000 48 #define FPSCR_VXIDI 0x00400000 49 #define FPSCR_VXZDZ 0x00200000 50 #define FPSCR_VXIMZ 0x00100000 51 #define FPSCR_VXVC 0x00080000 52 #define FPSCR_FR 0x00040000 53 #define FPSCR_FI 0x00020000 54 #define FPSCR_FPRF 0x0001f000 55 #define FPSCR_C 0x00010000 56 #define FPSCR_FPCC 0x0000f000 57 #define FPSCR_FL 0x00008000 58 #define FPSCR_FG 0x00004000 59 #define FPSCR_FE 0x00002000 60 #define FPSCR_FU 0x00001000 61 #define FPSCR_VXSOFT 0x00000400 62 #define FPSCR_VXSQRT 0x00000200 63 #define FPSCR_VXCVI 0x00000100 64 #define FPSCR_VE 0x00000080 65 #define FPSCR_OE 0x00000040 66 #define FPSCR_UE 0x00000020 67 #define FPSCR_ZE 0x00000010 68 #define FPSCR_XE 0x00000008 69 #define FPSCR_NI 0x00000004 70 #define FPSCR_RN 0x00000003 71 72 #ifdef _KERNEL 73 74 void enable_fpu(struct thread *); 75 void save_fpu(struct thread *); 76 void save_fpu_nodrop(struct thread *); 77 void cleanup_fpscr(void); 78 u_int get_fpu_exception(struct thread *); 79 void enable_fpu_kern(void); 80 void disable_fpu(struct thread *td); 81 82 /* 83 * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread(). 84 */ 85 #define FPU_KERN_NORMAL 0x0000 86 #define FPU_KERN_NOWAIT 0x0001 87 #define FPU_KERN_KTHR 0x0002 88 #define FPU_KERN_NOCTX 0x0004 89 90 struct fpu_kern_ctx; 91 92 struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags); 93 void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx); 94 void fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx, 95 u_int flags); 96 int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx); 97 int fpu_kern_thread(u_int flags); 98 int is_fpu_kern_thread(u_int flags); 99 100 #endif /* _KERNEL */ 101 102 #endif /* _MACHINE_FPU_H_ */ 103