text: /*	$OpenBSD: asm.h,v 1.2 1997/08/08 08:26:02 downsj Exp $	*/
  /*	$NetBSD: asm.h,v 1.5 1997/07/16 15:16:43 christos Exp $ */
  
  /*
   * Copyright (c) 1994 Allen Briggs
   * All rights reserved.
   *
   * Gleaned from locore.s and sun3 asm.h which had the following copyrights:
   * locore.s:
   * Copyright (c) 1988 University of Utah.
   * Copyright (c) 1982, 1990 The Regents of the University of California.
   * sun3/include/asm.h:
   * Copyright (c) 1993 Adam Glass
   * Copyright (c) 1990 The Regents of the University of California.
   *
   * 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.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the University of
   *	California, Berkeley and its contributors.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
   */
  
  #ifndef _ASM_H_
  #define _ASM_H_
  
  #ifdef __STDC__
  #define _C_LABEL(name)		_ ## name
  #else
  #define _C_LABEL(name)		_/**/name
  #endif
  #define	_ASM_LABEL(name)	name
  
  #ifdef PIC
  /*
   * PIC_PROLOGUE() is akin to the compiler generated function prologue for
   * PIC code. It leaves the address of the Global Offset Table in DEST,
   * clobbering register TMP in the process. Using the temporary enables us
   * to work without a stack frame (doing so requires saving %o7) .
   */
  #define PIC_PROLOGUE(dest,tmp) \
  	mov %o7,tmp; 3: call 4f; nop; 4: \
  	sethi %hi(__GLOBAL_OFFSET_TABLE_-(3b-.)),dest; \
  	or dest,%lo(__GLOBAL_OFFSET_TABLE_-(3b-.)),dest; \
  	add dest,%o7,dest; mov tmp,%o7
  
  /*
   * PICCY_SET() does the equivalent of a `set var, %dest' instruction in
   * a PIC-like way, but without involving the Global Offset Table. This
   * only works for VARs defined in the same file *and* in the text segment.
   */
  #define PICCY_SET(var,dest,tmp) \
  	mov %o7,tmp; 3: call 4f; nop; 4: \
  	add %o7,(var-3b),dest; mov tmp,%o7
  #else
  #define PIC_PROLOGUE(dest,tmp)
  #define PICCY_OFFSET(var,dest,tmp)
  #endif
  
  #define FTYPE(x)		.type x,@function
  #define OTYPE(x)		.type x,@object
  
  #define	_ENTRY(name) \
  	.align 4; .globl name; .proc 1; FTYPE(name); name:
  
  #ifdef GPROF
  #define _PROF_PROLOGUE \
  	.data; .align 4; 1: .long 0; \
  	.text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \
  	or %o0,%lo(1b),%o0; restore
  #else
  #define _PROF_PROLOGUE
  #endif
  
  #define ENTRY(name)		_ENTRY(_C_LABEL(name)); _PROF_PROLOGUE
  #define	ASENTRY(name)		_ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE
  #define	FUNC(name)		ASENTRY(name)
  
  
  #define ASMSTR			.asciz
  
  #define RCSID(name)		.asciz name
  
  #endif /* _ASM_H_ */
  