The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/include/fp.h

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    1 /*      $NetBSD: fp.h,v 1.1 2001/01/10 19:02:06 bjh21 Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 1995 Mark Brinicombe.
    5  * Copyright (c) 1995 Brini.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software written for Brini by Mark Brinicombe
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *      This product includes software developed by Brini.
   21  * 4. The name of the company nor the name of the author may be used to
   22  *    endorse or promote products derived from this software without specific
   23  *    prior written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
   26  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   27  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   28  * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   29  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   30  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   35  * SUCH DAMAGE.
   36  *
   37  * RiscBSD kernel project
   38  *
   39  * fp.h
   40  *
   41  * FP info
   42  *
   43  * Created      : 10/10/95
   44  *
   45  * $FreeBSD: releng/10.0/sys/arm/include/fp.h 254452 2013-08-17 14:53:53Z andrew $
   46  */
   47 
   48 #ifndef _MACHINE_FP_H
   49 #define _MACHINE_FP_H
   50 
   51 /*
   52  * An extended precision floating point number
   53  */
   54 
   55 typedef struct fp_extended_precision {
   56         u_int32_t fp_exponent;
   57         u_int32_t fp_mantissa_hi;
   58         u_int32_t fp_mantissa_lo;
   59 } fp_extended_precision_t;
   60 
   61 typedef struct fp_extended_precision fp_reg_t;
   62 
   63 /*
   64  * Information about the FPE-SP state that is stored in the pcb
   65  *
   66  * This needs to move and be hidden from userland.
   67  */
   68 
   69 struct vfp_state {
   70         u_int64_t reg[32];
   71         u_int32_t fpscr;
   72 };
   73 
   74 /*
   75  * Type for a saved FP context, if we want to translate the context to a
   76  * user-readable form
   77  */
   78 
   79 typedef struct {
   80         u_int32_t fpsr;
   81         fp_extended_precision_t regs[8];
   82 } fp_state_t;
   83 
   84 #endif /* _MACHINE_FP_H_ */
   85 
   86 /* End of fp.h */

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