source: svn/newcon3bcm2_21bu/nexus/platforms/97552/src/bare/libgcc/asm.h

/*
 * Copyright (c) 1996-2006 MIPS Technologies, Inc.
 * All rights reserved.
 * 
 * Unpublished rights (if any) reserved under the copyright laws of the
 * United States of America and other countries.
 * 
 * This code is proprietary to MIPS Technologies, Inc. ("MIPS
 * Technologies").  Any copying, reproducing, modifying or use of
 * this code (in whole or in part) that is not expressly permitted
 * in writing by MIPS Technologies or an authorized third party is
 * strictly prohibited.  At a minimum, this code is protected under
 * unfair competition and copyright laws.  Violations thereof may result
 * in criminal penalties and fines.
 * 
 * MIPS Technologies reserves the right to change this code to improve
 * function, design or otherwise.  MIPS Technologies does not assume any
 * liability arising out of the application or use of this code, or of
 * any error or omission in such code.  Any warranties, whether express,
 * statutory, implied or otherwise, including but not limited to the
 * implied warranties of merchantability or fitness for a particular
 * purpose, are excluded.  Except as expressly provided in any written
 * license agreement from MIPS Technologies or an authorized third party,
 * the furnishing of this code does not give recipient any license to
 * any intellectual property rights, including any patent rights, that
 * cover this code.
 * 
 * This code shall not be exported, reexported, transferred, or released,
 * directly or indirectly, in violation of the law of any country or
 * international law, regulation, treaty, Executive Order, statute,
 * amendments or supplements thereto.  Should a conflict arise regarding
 * the export, reexport, transfer, or release of this code, the laws of
 * the United States of America shall be the governing law.
 * 
 * This code constitutes one or more of the following: commercial
 * computer software, commercial computer software documentation or
 * other commercial items.  If the user of this code, or any related
 * documentation of any kind, including related technical data or
 * manuals, is an agency, department, or other entity of the United
 * States government ("Government"), the use, duplication, reproduction,
 * release, modification, disclosure, or transfer of this code, or
 * any related documentation of any kind, is restricted in accordance
 * with Federal Acquisition Regulation 12.212 for civilian agencies
 * and Defense Federal Acquisition Regulation Supplement 227.7202 for
 * military agencies.  The use of this code by the Government is further
 * restricted in accordance with the terms of the license agreement(s)
 * and/or applicable contract terms and conditions covering this code
 * from MIPS Technologies or an authorized third party.
 * 
 * 
 */

/*
 * asm.h: various macros to help assembly language writers
 */

/* ABI specific stack frame layout and manipulation. */
/* Standard O32 */
#define SZREG           4       /* saved register size */
#define REG_S           sw      /* store saved register */
#define REG_L           lw      /* load saved register */
#define SZARG           4       /* argument register size */
#define NARGSAVE        4       /* arg register space on caller stack */
#define ALSZ            7       /* stack alignment - 1 */
#define ALMASK          (~7)    /* stack alignment mask */
#define LOG2_STACK_ALGN 3       /* log2(8) */
#define SZPTR           4       /* pointer size */
#define LOG2_SZPTR      2       /* log2(4) */
#define PTR_S           sw      /* store pointer */
#define PTR_L           lw      /* load pointer */
#define PTR_SUBU        subu    /* decrement pointer */
#define PTR_ADDU        addu    /* increment pointer */
#define PTR             .word   /* pointer type pseudo */                  

/* Concatenate two names. */
#ifdef __STDC__
# define _ASMCONCAT(A, B) A ## B
#else
# define _ASMCONCAT(A, B) A/**/B
#endif

/* Name of reset code section. */
#ifndef _RESET_SECTION
# define _RESET_SECTION .section .reset, "ax", @progbits
#endif

#ifndef _RESET_SECTION_NAMED
/* No function section support for now, since binutils fails to cope with
   external branches. */
# define _RESET_SECTION_NAMED(name) .pushsection .reset, "ax", @progbits
#endif

/* Name of boot code section. */
#ifndef _BOOT_SECTION
# define _BOOT_SECTION .section .boot, "ax", @progbits
#endif

#ifndef _BOOT_SECTION_NAMED
/* No function section support for now, since binutils fails to cope with
   external branches. */
# define _BOOT_SECTION_NAMED(name) .pushsection .boot, "ax", @progbits
#endif

/* Name of standard code section. */
#ifndef _NORMAL_SECTION_UNNAMED
# define _NORMAL_SECTION_UNNAMED .section .text, "ax", @progbits
#endif

#ifndef _NORMAL_SECTION_NAMED
# ifdef _FUNCTION_SECTIONS_
#  define _NORMAL_SECTION_NAMED(name) .pushsection .text ##.name, "ax", @progbits
# else
#  define _NORMAL_SECTION_NAMED(name) .pushsection .text, "ax", @progbits
# endif
#endif

/* Default code section. */
#ifndef _TEXT_SECTION_NAMED
# if defined(_RESETCODE)
#  define _TEXT_SECTION_NAMED _RESET_SECTION_NAMED
# elif defined(_BOOTCODE)
#  define _TEXT_SECTION_NAMED _BOOT_SECTION_NAMED
# else
#  define _TEXT_SECTION_NAMED _NORMAL_SECTION_NAMED
# endif
#endif

#ifndef _TEXT_SECTION
# if defined(_RESETCODE)
#  define _TEXT_SECTION _RESET_SECTION
# elif defined(_BOOTCODE)
#  define _TEXT_SECTION _BOOT_SECTION
# else
#  define _TEXT_SECTION _NORMAL_SECTION_UNNAMED
# endif
        _TEXT_SECTION
#endif

/*
 * Leaf functions declarations.
 */

/* Global leaf function. */
#define LEAF(name)                      \
        _TEXT_SECTION_NAMED(name);      \
        .globl  name;                   \
        .ent    name;                   \
name:

/* Static/Local leaf function. */
#define SLEAF(name)                     \
        _TEXT_SECTION_NAMED(name);      \
        .ent    name;                   \
name:

/* Weak leaf function. */
#define WLEAF(name)                     \
        _TEXT_SECTION_NAMED(name);      \
        .weakext name;                  \
        .ent    name;                   \
name:

/* Weak alias leaf function. */
#define ALEAF(name,alias)               \
        _TEXT_SECTION_NAMED(name);      \
        .weakext alias,name;            \
        .ent    name;                   \
name:

/*
 * Alternative function entrypoints.
 */

/* Global alternative entrypoint. */
#define AENT(name)                      \
        .globl  name;                   \
        .aent   name;                   \
name:
#define XLEAF(name)     AENT(name)

/* Local/static alternative entrypoint. */
#define SAENT(name)                     \
        .aent   name;                   \
name:
#define SXLEAF(name)    SAENT(name)


/*
 * Leaf functions declarations.
 */

/* Global nested function. */
#define NESTED(name, framesz, rareg)    \
        _TEXT_SECTION_NAMED(name);      \
        .globl  name;                   \
        .ent    name;                   \
        .frame  $sp, framesz, rareg;    \
name:

/* Static/Local nested function. */
#define SNESTED(name, framesz, rareg)   \
        _TEXT_SECTION_NAMED(name);      \
        .ent    name;                   \
        .frame  $sp, framesz, rareg;    \
name:

/* Weak nested function. */
#define WNESTED(name, framesz, rareg)   \
        _TEXT_SECTION_NAMED(name);      \
        .weakext name;                  \
        .ent    name;                   \
        .frame  $sp, framesz, rareg;    \
name:

/* Weak alias nested function. */
#define ANESTED(name, alias, framesz, rareg) \
        _TEXT_SECTION_NAMED(name);      \
        .weakext alias, name;           \
        .ent    name;                   \
        .frame  $sp, framesz, rareg;    \
name:

/*
 * Function termination
 */
#define END(name)                       \
        .size name,.-name;              \
        .end    name;                   \
        .popsection

#define SEND(name)      END(name)
#define WEND(name)      END(name)
#define AEND(name,alias) END(name)

/*
 * Global data declaration.
 */
#define EXPORT(name) \
        .globl name; \
        .type name,@object; \
name:

/*
 * Global data declaration with size.
 */
#define EXPORTS(name,sz)                \
        .globl name;                    \
        .type name,@object;             \
        .size name,sz;                  \
name:

/*
 * Weak data declaration with size.
 */
#define WEXPORT(name,sz)                \
        .weakext name;                  \
        .type name,@object;             \
        .size name,sz;                  \
name:

/*
 * Global data reference with size.
 */
#define IMPORT(name, size)              \
        .extern name,size

/*
 * Global zeroed data.
 */
#define BSS(name,size)                  \
        .type name,@object;             \
        .comm   name,size

/*
 * Local zeroed data.
 */
#define LBSS(name,size)                 \
        .lcomm  name,size

/*
 * Insert call to _mcount if profiling.
 */
#ifdef __PROFILING__
#define _MCOUNT                         \
        .set push;                      \
        .set noat;                      \
        move    $1,$31;                 \
        jal     _mcount;                \
        .set pop
#else
#define _MCOUNT
#endif