bc84db6267
occurs using the SSE math processor. Update comments describing the handling of the exception status bits in coprocessors control words. Remove GET_FPU_CW and GET_FPU_SW macros which were used only once. Prefer to use curpcb to access pcb_save over the longer path of referencing pcb through the thread structure. Based on the submission by: Ed Alley <wea llnl gov> PR: amd64/169927 Reviewed by: bde MFC after: 3 weeks
85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)npx.h 5.3 (Berkeley) 1/18/91
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* $FreeBSD$
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*/
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/*
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* Floating Point Data Structures and Constants
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* W. Jolitz 1/90
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*/
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#ifndef _MACHINE_FPU_H_
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#define _MACHINE_FPU_H_
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#include <x86/fpu.h>
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#ifdef _KERNEL
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struct fpu_kern_ctx;
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#define PCB_USER_FPU(pcb) (((pcb)->pcb_flags & PCB_KERNFPU) == 0)
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#define XSAVE_AREA_ALIGN 64
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void fpudna(void);
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void fpudrop(void);
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void fpuexit(struct thread *td);
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int fpuformat(void);
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int fpugetregs(struct thread *td);
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void fpuinit(void);
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void fpusave(void *addr);
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int fpusetregs(struct thread *td, struct savefpu *addr,
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char *xfpustate, size_t xfpustate_size);
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int fpusetxstate(struct thread *td, char *xfpustate,
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size_t xfpustate_size);
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int fputrap_sse(void);
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int fputrap_x87(void);
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void fpuuserinited(struct thread *td);
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struct fpu_kern_ctx *fpu_kern_alloc_ctx(u_int flags);
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void fpu_kern_free_ctx(struct fpu_kern_ctx *ctx);
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int fpu_kern_enter(struct thread *td, struct fpu_kern_ctx *ctx,
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u_int flags);
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int fpu_kern_leave(struct thread *td, struct fpu_kern_ctx *ctx);
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int fpu_kern_thread(u_int flags);
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int is_fpu_kern_thread(u_int flags);
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/*
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* Flags for fpu_kern_alloc_ctx(), fpu_kern_enter() and fpu_kern_thread().
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*/
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#define FPU_KERN_NORMAL 0x0000
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#define FPU_KERN_NOWAIT 0x0001
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#endif
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#endif /* !_MACHINE_FPU_H_ */
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