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/* Assembler macros for CRIS.

   Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Library General Public License as

   published by the Free Software Foundation; either version 2 of the

   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public

   License along with the GNU C Library; see the file COPYING.LIB.  If not,

   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#ifndef _SYSDEP_H_

#define _SYSDEP_H_

#ifndef C_LABEL

/* Define a macro we can use to construct the asm name for a C symbol.  */

#ifdef  __STDC__

#define C_LABEL(name)           name##:

#else

#define C_LABEL(name)           name/**/:

#endif

#endif /* C_LABEL */

#define __STR(x) #x

#define STR(x) __STR(x)

/* Mark the end of function named SYM.  This is used on some platforms

   to generate correct debugging information.  */

#ifndef END

#define END(sym)

#endif

#define C_SYMBOL_NAME(name) name

#ifdef  __ASSEMBLER__

/* Syntactic details of assembly-code.  */

/* It is *not* generally true that "ELF uses byte-counts for .align, most

   others use log2 of count of bytes", like some neighboring configs say.

   See "align" in gas/read.c which is not overridden by

   gas/config/obj-elf.c.  It takes a log2 argument.  *Some* targets

   override it to take a byte argument.  People should read source instead

   of relying on hearsay.  */

#define ALIGNARG(log2) log2

#define ASM_GLOBAL_DIRECTIVE .globl 

#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg

#define ASM_SIZE_DIRECTIVE(name) .size name,.-name

/* The non-PIC jump is preferred, since it does not stall, and does not

   invoke generation of a PLT.  These macros assume that $r0 is set up as

   GOT register.  */

#ifdef __PIC__

#define PLTJUMP(_x) \

  add.d C_SYMBOL_NAME (_x):PLT,$pc

#define PLTCALL(_x) \

  jsr [$r0+C_SYMBOL_NAME (_x):GOTPLT16]

#define SETUP_PIC \

  push  $r0                                             @ \

  move.d $pc,$r0                                        @ \

  sub.d .:GOTOFF,$r0

#define TEARDOWN_PIC pop $r0

#else

#define PLTJUMP(_x) jump C_SYMBOL_NAME (_x)

#define PLTCALL(_x) jsr  C_SYMBOL_NAME (_x)

#define SETUP_PIC

#define TEARDOWN_PIC

#endif

/* Define an entry point visible from C.  */

#define ENTRY(name) \

  .text                                                 @ \

  ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (name)             @ \

  ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME (name), function)   @ \

  .align ALIGNARG (2)                                   @ \

  C_LABEL(name)                                         @ \

  CALL_MCOUNT

#undef  END

#define END(name) \

  ASM_SIZE_DIRECTIVE (C_SYMBOL_NAME (name))

#define PSEUDO(name, syscall_name, args) \

  ENTRY (name)                      @ \

  DOARGS_##args                     @ \

  movu.w SYS_ify (syscall_name),$r9         @ \

  break 13                      @ \

  cmps.w -4096,$r10                 @ \

  bhs   0f                      @ \

  nop                           @ \

  UNDOARGS_return_##args

#define PSEUDO_END(name) \

0:                          @ \

  SETUP_PIC                     @ \

  PLTJUMP (__syscall_error)               @ \

  END (name)

/* If compiled for profiling, call `_mcount' at the start of each function.

   FIXME: Note that profiling is not actually implemented.  This is just

   example code which might not even compile, though it is believed to be

   correct.  */

#ifdef  PROF

#define CALL_MCOUNT \

  push  $srp                                            @ \

  push  $r9                                             @ \

  push  $r10                                            @ \

  push  $r11                                            @ \

  push  $r12                                            @ \

  push  $r13                                            @ \

  SETUP_PIC                                             @ \

  PLTCALL (_mcount)                                     @ \

  TEARDOWN_PIC                                          @ \

  pop   $r13                                            @ \

  pop   $r12                                            @ \

  pop   $r11                                            @ \

  pop   $r10                                            @ \

  pop   $r9                                             @ \

  pop   $srp

#else

#define CALL_MCOUNT             /* Do nothing.  */

#endif

#endif /* __ASSEMBLER__ */

#endif /* _SYSDEP_H_ */