2 * Copyright (c) 1990 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * from: @(#)npx.h 5.3 (Berkeley) 1/18/91
37 * Floating Point Data Structures and Constants
41 #ifndef _MACHINE_FPU_H_
42 #define _MACHINE_FPU_H_
50 #define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNFPU) == 0)
52 #define XSAVE_AREA_ALIGN 64
56 void fpuexit(struct thread *td);
58 int fpugetregs(struct thread *td);
60 void fpurestore(void *addr);
61 void fpuresume(void *addr);
62 void fpusave(void *addr);
63 int fpusetregs(struct thread *td, struct savefpu *addr,
64 char *xfpustate, size_t xfpustate_size);
65 int fpusetxstate(struct thread *td, char *xfpustate,
66 size_t xfpustate_size);
67 void fpususpend(void *addr);
68 int fputrap_sse(void);
69 int fputrap_x87(void);
70 void fpuuserinited(struct thread *td);
71 struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
72 void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
73 int fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
75 int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
76 int fpu_kern_thread(u_int flags);
77 int is_fpu_kern_thread(u_int flags);
79 struct savefpu *fpu_save_area_alloc(void);
80 void fpu_save_area_free(struct savefpu *fsa);
81 void fpu_save_area_reset(struct savefpu *fsa);
84 * Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
86 #define FPU_KERN_NORMAL 0x0000
87 #define FPU_KERN_NOWAIT 0x0001
88 #define FPU_KERN_KTHR 0x0002
92 #endif /* !_MACHINE_FPU_H_ */