b7ebbcd2e4
* Save the required VFP registers on context switch. If the exception bit is set we need to save and restore the FPINST register, and if the fp2v bit is also set we need to save and restore FPINST2. * Move saving and restoring the floating point control registers to C. * Clear the fpexc exception and fp2v flags on a floating-point exception. * Signal a SIGFPE if the fpexc exception flag is set on an undefined instruction. This is how the ARM core signals to software there is a floating-point exception.
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/* $NetBSD: fp.h,v 1.1 2001/01/10 19:02:06 bjh21 Exp $ */
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/*-
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* Copyright (c) 1995 Mark Brinicombe.
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* Copyright (c) 1995 Brini.
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* All rights reserved.
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*
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* This code is derived from software written for Brini by Mark Brinicombe
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Brini.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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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* RiscBSD kernel project
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*
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* fp.h
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*
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* FP info
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*
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* Created : 10/10/95
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_FP_H
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#define _MACHINE_FP_H
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/*
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* An extended precision floating point number
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*/
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typedef struct fp_extended_precision {
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u_int32_t fp_exponent;
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u_int32_t fp_mantissa_hi;
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u_int32_t fp_mantissa_lo;
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} fp_extended_precision_t;
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typedef struct fp_extended_precision fp_reg_t;
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/*
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* Information about the FPE-SP state that is stored in the pcb
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*
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* This needs to move and be hidden from userland.
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*/
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struct vfp_state {
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u_int64_t reg[32];
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u_int32_t fpscr;
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u_int32_t fpexec;
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u_int32_t fpinst;
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u_int32_t fpinst2;
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};
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/*
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* Type for a saved FP context, if we want to translate the context to a
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* user-readable form
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*/
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typedef struct {
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u_int32_t fpsr;
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fp_extended_precision_t regs[8];
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} fp_state_t;
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#endif /* _MACHINE_FP_H_ */
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/* End of fp.h */
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