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[/] [or1k/] [trunk/] [rtems/] [c/] [src/] [exec/] [score/] [cpu/] [sparc/] [asm.h] - Blame information for rev 1765

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1 158 chris
/*  asm.h
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 *
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 *  This include file attempts to address the problems
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 *  caused by incompatible flavors of assemblers and
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 *  toolsets.  It primarily addresses variations in the
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 *  use of leading underscores on symbols and the requirement
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 *  that register names be preceded by a %.
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 *
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 *
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 *  NOTE: The spacing in the use of these macros
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 *        is critical to them working as advertised.
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 *
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 *  COPYRIGHT:
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 *
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 *  This file is based on similar code found in newlib available
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 *  from ftp.cygnus.com.  The file which was used had no copyright
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 *  notice.  This file is freely distributable as long as the source
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 *  of the file is noted.
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 *
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 *  $Id: asm.h,v 1.2 2001-09-27 11:59:30 chris Exp $
21 158 chris
 */
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#ifndef __SPARC_ASM_h
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#define __SPARC_ASM_h
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/*
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 *  Indicate we are in an assembly file and get the basic CPU definitions.
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 */
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#ifndef ASM
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#define ASM
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#endif
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#include <rtems/score/targopts.h>
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#include <rtems/score/cpu.h>
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/*
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 *  Recent versions of GNU cpp define variables which indicate the
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 *  need for underscores and percents.  If not using GNU cpp or
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 *  the version does not support this, then you will obviously
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 *  have to define these as appropriate.
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 */
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/* XXX __USER_LABEL_PREFIX__ and __REGISTER_PREFIX__ do not work on gcc 2.7.0 */
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/* XXX The following ifdef magic fixes the problem but results in a warning   */
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/* XXX when compiling assembly code.                                          */
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#ifndef __USER_LABEL_PREFIX__
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#define __USER_LABEL_PREFIX__ _
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#endif
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#ifndef __REGISTER_PREFIX__
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#define __REGISTER_PREFIX__
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#endif
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/* ANSI concatenation macros.  */
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#define CONCAT1(a, b) CONCAT2(a, b)
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#define CONCAT2(a, b) a ## b
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/* Use the right prefix for global labels.  */
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#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
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/* Use the right prefix for registers.  */
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#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
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/*
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 *  define macros for all of the registers on this CPU
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 *
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 *  EXAMPLE:     #define d0 REG (d0)
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 */
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/*
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 *  Define macros to handle section beginning and ends.
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 */
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#define BEGIN_CODE_DCL .text
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#define END_CODE_DCL
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#define BEGIN_DATA_DCL .data
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#define END_DATA_DCL
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#define BEGIN_CODE .text
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#define END_CODE
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#define BEGIN_DATA
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#define END_DATA
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#define BEGIN_BSS
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#define END_BSS
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#define END
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/*
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 *  Following must be tailor for a particular flavor of the C compiler.
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 *  They may need to put underscores in front of the symbols.
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 */
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#define PUBLIC(sym) .globl SYM (sym)
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#define EXTERN(sym) .globl SYM (sym)
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/*
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 *  Entry for traps which jump to a programmer-specified trap handler.
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 */
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#define TRAP(_vector, _handler)  \
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  mov   %psr, %l0 ; \
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  sethi %hi(_handler), %l4 ; \
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  jmp   %l4+%lo(_handler); \
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  mov   _vector, %l3
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/*
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 *  Used for the reset trap for ERC32 to avoid a supervisor instruction
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 */
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#define RTRAP(_vector, _handler)  \
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  mov   %g0, %l0 ; \
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  sethi %hi(_handler), %l4 ; \
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  jmp   %l4+%lo(_handler); \
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  mov   _vector, %l3
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#endif
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/* end of include file */
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