freebsd-dev/sys/sparc64/include/fp.h

/*-
 * Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>.  All rights reserved.
 *
 * 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 AUTHOR ``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 AUTHOR 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.
 *
 * $FreeBSD$
 */

#ifndef	_MACHINE_FP_H_
#define	_MACHINE_FP_H_

#ifdef _KERNEL

/*
 * Note: The pointer passed to savefpctx must be aligned on a 64 byte
 * boundary.
 */
void	savefpctx(uint32_t *fp);

#endif /* _KERNEL */
#endif /* !_MACHINE_FP_H_ */
Sigh. Add two files needed for the sparc64 fp contect switching code that were forgotten in the last commit. Pointy hat to: tmm 2001-08-05 03:47:02 +00:00			`/*-`
			`* Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>. All rights reserved.`
			`*`
			`* 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.`
			`*`
Correct copyright language. 2001-08-10 04:51:19 +00:00			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
Sigh. Add two files needed for the sparc64 fp contect switching code that were forgotten in the last commit. Pointy hat to: tmm 2001-08-05 03:47:02 +00:00			`* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES`
			`* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.`
Correct copyright language. 2001-08-10 04:51:19 +00:00			`* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,`
Sigh. Add two files needed for the sparc64 fp contect switching code that were forgotten in the last commit. Pointy hat to: tmm 2001-08-05 03:47:02 +00:00			`* 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.`
			`*`
			`* $FreeBSD$`
			`*/`

			`#ifndef _MACHINE_FP_H_`
			`#define _MACHINE_FP_H_`

1. Split fp.h into fp.h and fsr.h so that the latter can be included in asm files. 2. Temporarily cause subnormal operands in floating point operations to be treated as zeros so that comlpetion of the operation does not need to be emulated. 3. Catch fp_exception_other and correctly skip over the unfinished instruction, but basically ignore them. Emulating the instruction is not yet supported. 4. Zero td_retval[1] as well in syscall(). Submitted by: tmm (2, 3) 2001-11-18 04:00:22 +00:00			`#ifdef _KERNEL`

Sigh. Add two files needed for the sparc64 fp contect switching code that were forgotten in the last commit. Pointy hat to: tmm 2001-08-05 03:47:02 +00:00			`/*`
- Rename pcb_fpstate to pcb_ufp (user floating point), and change it to a simple array of 64 ints. - Use a critical section when saving floating point state in cpu_fork instead of sched_lock. 2003-04-01 04:02:45 +00:00			`* Note: The pointer passed to savefpctx must be aligned on a 64 byte`
			`* boundary.`
Sigh. Add two files needed for the sparc64 fp contect switching code that were forgotten in the last commit. Pointy hat to: tmm 2001-08-05 03:47:02 +00:00			`*/`
- Rename pcb_fpstate to pcb_ufp (user floating point), and change it to a simple array of 64 ints. - Use a critical section when saving floating point state in cpu_fork instead of sched_lock. 2003-04-01 04:02:45 +00:00			`void savefpctx(uint32_t *fp);`
Sigh. Add two files needed for the sparc64 fp contect switching code that were forgotten in the last commit. Pointy hat to: tmm 2001-08-05 03:47:02 +00:00
1. Split fp.h into fp.h and fsr.h so that the latter can be included in asm files. 2. Temporarily cause subnormal operands in floating point operations to be treated as zeros so that comlpetion of the operation does not need to be emulated. 3. Catch fp_exception_other and correctly skip over the unfinished instruction, but basically ignore them. Emulating the instruction is not yet supported. 4. Zero td_retval[1] as well in syscall(). Submitted by: tmm (2, 3) 2001-11-18 04:00:22 +00:00			`#endif /* _KERNEL */`
Sigh. Add two files needed for the sparc64 fp contect switching code that were forgotten in the last commit. Pointy hat to: tmm 2001-08-05 03:47:02 +00:00			`#endif /* !_MACHINE_FP_H_ */`