rt-thread/libcpu/mips/common/asm.h

/*
 * Assembly Macros For MIPS
 *
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2019-12-04     Jiaxun Yang  Initial version
 */


#ifndef __ASM_H__
#define __ASM_H__

#include <rtconfig.h>
/*
 * LEAF - declare leaf routine
 */
#define LEAF(symbol)                        \
        .globl  symbol;                     \
        .align  2;                          \
        .type   symbol,@function;           \
        .ent    symbol,0;                   \
symbol:     .frame  sp,0,ra

/*
 * NESTED - declare nested routine entry point
 */
#define NESTED(symbol, framesize, rpc)      \
        .globl  symbol;                     \
        .align  2;                          \
        .type   symbol,@function;           \
        .ent    symbol,0;                   \
symbol:     .frame  sp, framesize, rpc

/*
 * END - mark end of function
 */
#define END(function)                       \
        .end    function;                   \
        .size   function,.-function

/*
 * EXPORT - export definition of symbol
 */
#define EXPORT(symbol)                      \
        .globl  symbol;                     \
symbol:

/*
 * FEXPORT - export definition of a function symbol
 */
#define FEXPORT(symbol)                     \
        .globl  symbol;                     \
        .type   symbol,@function;           \
symbol:

/*
 * 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


/*
 * ABS - export absolute symbol
 */
#define ABS(symbol,value)       \
        .globl  symbol;         \
symbol      =   value


#define TEXT(msg)               \
        .pushsection .data;     \
8:      .asciiz msg;            \
        .popsection;


#define ENTRY(name)             \
  .globl name;                  \
  .align 2;                     \
  .ent name,0;                  \
  name##:

/*
 * Macros to handle different pointer/register sizes for 32/64-bit code
 */
#if defined ARCH_MIPS64
/*
 * Size of a register
 */
#define SZREG   8

/*
 * Use the following macros in assemblercode to load/store registers,
 * pointers etc.
 */
#define REG_S       sd
#define REG_L       ld
#define REG_SUBU    dsubu
#define REG_ADDU    daddu

/*
 * How to add/sub/load/store/shift C int variables.
 */
#define INT_ADD     dadd
#define INT_ADDU    daddu
#define INT_ADDI    daddi
#define INT_ADDIU   daddiu
#define INT_SUB     dsub
#define INT_SUBU    dsubu
#define INT_L       ld
#define INT_S       sd
#define INT_SLL     dsll
#define INT_SLLV    dsllv
#define INT_SRL     dsrl
#define INT_SRLV    dsrlv
#define INT_SRA     dsra
#define INT_SRAV    dsrav

/*
 * Use the following macros in assemblercode to load/store registers,
 * pointers etc.
 */
#define LONG_ADD    dadd
#define LONG_ADDU   daddu
#define LONG_ADDI   daddi
#define LONG_ADDIU  daddiu
#define LONG_SUB    dsub
#define LONG_SUBU   dsubu
#define LONG_L      ld
#define LONG_S      sd
#define LONG_SP     sdp
#define LONG_SLL    dsll
#define LONG_SLLV   dsllv
#define LONG_SRL    dsrl
#define LONG_SRLV   dsrlv
#define LONG_SRA    dsra
#define LONG_SRAV   dsrav

#define LONG        .dword
#define LONGSIZE    8
#define LONGMASK    7
#define LONGLOG     3

/*
 * How to add/sub/load/store/shift pointers.
 */
#define PTR_ADD     dadd
#define PTR_ADDU    daddu
#define PTR_ADDI    daddi
#define PTR_ADDIU   daddiu
#define PTR_SUB     dsub
#define PTR_SUBU    dsubu
#define PTR_L       ld
#define PTR_S       sd
#define PTR_LA      dla
#define PTR_LI      dli
#define PTR_SLL     dsll
#define PTR_SLLV    dsllv
#define PTR_SRL     dsrl
#define PTR_SRLV    dsrlv
#define PTR_SRA     dsra
#define PTR_SRAV    dsrav

#define PTR_SCALESHIFT  3

#define PTR     .dword
#define PTRSIZE     8
#define PTRLOG      3

#define MFC0        dmfc0
#define MTC0        dmtc0

#else
/*
 * Size of a register
 */
#define SZREG   4


/*
 * Use the following macros in assemblercode to load/store registers,
 * pointers etc.
 */
#define REG_S       sw
#define REG_L       lw
#define REG_SUBU    subu
#define REG_ADDU    addu


/*
 * How to add/sub/load/store/shift C int variables.
 */
#define INT_ADD     add
#define INT_ADDU    addu
#define INT_ADDI    addi
#define INT_ADDIU   addiu
#define INT_SUB     sub
#define INT_SUBU    subu
#define INT_L       lw
#define INT_S       sw
#define INT_SLL     sll
#define INT_SLLV    sllv
#define INT_SRL     srl
#define INT_SRLV    srlv
#define INT_SRA     sra
#define INT_SRAV    srav



/*
 * How to add/sub/load/store/shift C long variables.
 */
#define LONG_ADD    add
#define LONG_ADDU   addu
#define LONG_ADDI   addi
#define LONG_ADDIU  addiu
#define LONG_SUB    sub
#define LONG_SUBU   subu
#define LONG_L      lw
#define LONG_S      sw
#define LONG_SLL    sll
#define LONG_SLLV   sllv
#define LONG_SRL    srl
#define LONG_SRLV   srlv
#define LONG_SRA    sra
#define LONG_SRAV   srav

#define LONG        .word
#define LONGSIZE    4
#define LONGMASK    3
#define LONGLOG     2



/*
 * How to add/sub/load/store/shift pointers.
 */
#define PTR_ADD     add
#define PTR_ADDU    addu
#define PTR_ADDI    addi
#define PTR_ADDIU   addiu
#define PTR_SUB     sub
#define PTR_SUBU    subu
#define PTR_L       lw
#define PTR_S       sw
#define PTR_LA      la
#define PTR_SLL     sll
#define PTR_SLLV    sllv
#define PTR_SRL     srl
#define PTR_SRLV    srlv
#define PTR_SRA     sra
#define PTR_SRAV    srav

#define PTR_SCALESHIFT  2

#define PTR         .word
#define PTRSIZE     4
#define PTRLOG      2


/*
 * Some cp0 registers were extended to 64bit for MIPS III.
 */
#define MFC0        mfc0
#define MTC0        mtc0

#endif

#define SSNOP       sll zero, zero, 1

#endif /* end of __ASM_H__ */