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freebsd-dev/sys/powerpc/fpu/fpu_extern.h

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Add a floating-point emulator so that a single userland or single ABI can run on processors that don't have a FPU. This is typically the case for Book E processors. While a tuned system will probably want to use soft-float (or use a processor that has a FPU if the usage is FP intensive enough), allowing hard-float on FPU-less systems gives great portability and flexibility. Obtained from: NetBSD
2008-02-23 20:05:26 +00:00
/* $NetBSD: fpu_extern.h,v 1.3 2005/12/11 12:18:42 christos Exp $ */
/* $FreeBSD$ */
/*-
sys/powerpc: further adoption of SPDX licensing ID tags. Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
2017-11-27 15:09:59 +00:00
* SPDX-License-Identifier: BSD-2-Clause-NetBSD
*
Add a floating-point emulator so that a single userland or single ABI can run on processors that don't have a FPU. This is typically the case for Book E processors. While a tuned system will probably want to use soft-float (or use a processor that has a FPU if the usage is FP intensive enough), allowing hard-float on FPU-less systems gives great portability and flexibility. Obtained from: NetBSD
2008-02-23 20:05:26 +00:00
* Copyright (c) 1995 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
struct proc;
Restore the ABI of 'struct fpreg' on powerpc. The PT_{GET,SET}FPREGS requests use 'struct fpreg' and the NT_FPREGSET core note stores a copy of 'struct fpreg'. As with x86 and the floating point state there compared to the extended state in XSAVE, struct fpreg on powerpc now only holds the 'base' FP state, and setting it via PT_SETFPREGS leaves the extended vector state in a thread unchanged. Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D5004
2016-02-01 23:12:04 +00:00
struct fpu;
Add a floating-point emulator so that a single userland or single ABI can run on processors that don't have a FPU. This is typically the case for Book E processors. While a tuned system will probably want to use soft-float (or use a processor that has a FPU if the usage is FP intensive enough), allowing hard-float on FPU-less systems gives great portability and flexibility. Obtained from: NetBSD
2008-02-23 20:05:26 +00:00
struct trapframe;
union instr;
struct fpemu;
struct fpn;
/* fpu.c */
Restore the ABI of 'struct fpreg' on powerpc. The PT_{GET,SET}FPREGS requests use 'struct fpreg' and the NT_FPREGSET core note stores a copy of 'struct fpreg'. As with x86 and the floating point state there compared to the extended state in XSAVE, struct fpreg on powerpc now only holds the 'base' FP state, and setting it via PT_SETFPREGS leaves the extended vector state in a thread unchanged. Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D5004
2016-02-01 23:12:04 +00:00
int fpu_emulate(struct trapframe *, struct fpu *);
Add a floating-point emulator so that a single userland or single ABI can run on processors that don't have a FPU. This is typically the case for Book E processors. While a tuned system will probably want to use soft-float (or use a processor that has a FPU if the usage is FP intensive enough), allowing hard-float on FPU-less systems gives great portability and flexibility. Obtained from: NetBSD
2008-02-23 20:05:26 +00:00
int fpu_execute(struct trapframe *, struct fpemu *, union instr *);
/* fpu_explode.c */
int fpu_itof(struct fpn *, u_int);
int fpu_xtof(struct fpn *, u_int64_t);
int fpu_stof(struct fpn *, u_int);
int fpu_dtof(struct fpn *, u_int, u_int);
/* fpu_implode.c */
u_int fpu_ftoi(struct fpemu *, struct fpn *);
u_int fpu_ftox(struct fpemu *, struct fpn *, u_int *);
u_int fpu_ftos(struct fpemu *, struct fpn *);
u_int fpu_ftod(struct fpemu *, struct fpn *, u_int *);
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