388 lines
9.3 KiB
C
Executable File
388 lines
9.3 KiB
C
Executable File
/*
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* include/asm-mips/asm.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995, 1996, 1997 by Ralf Baechle
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*
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* Some useful macros for MIPS assembler code
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*
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* Some of the routines below contain useless nops that will be optimized
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* away by gas in -O mode. These nops are however required to fill delay
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* slots in noreorder mode.
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*/
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#ifndef __ASM_ASM_H
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#define __ASM_ASM_H
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#include <asm/sgidefs.h>
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#ifndef CAT
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#ifdef __STDC__
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#define __CAT(str1,str2) str1##str2
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#else
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#define __CAT(str1,str2) str1/**/str2
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#endif
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#define CAT(str1,str2) __CAT(str1,str2)
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#endif
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/*
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* Macros to handle different pointer/register sizes for 32/64-bit code
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*
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* 64 bit address space isn't used yet, so we may use the R3000 32 bit
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* defines for now.
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*/
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#define PTR .word
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#define PTRSIZE 4
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#define PTRLOG 2
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/*
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* PIC specific declarations
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* Not used for the kernel but here seems to be the right place.
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*/
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#ifdef __PIC__
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#define CPRESTORE(register) \
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.cprestore register
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#define CPADD(register) \
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.cpadd register
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#define CPLOAD(register) \
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.cpload register
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#else
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#define CPRESTORE(register)
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#define CPADD(register)
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#define CPLOAD(register)
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#endif
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/*
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* LEAF - declare leaf routine
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*/
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#define LEAF(symbol) \
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.globl symbol; \
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.align 2; \
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.type symbol,@function; \
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.ent symbol,0; \
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symbol: .frame sp,0,ra
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/*
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* NESTED - declare nested routine entry point
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*/
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#define NESTED(symbol, framesize, rpc) \
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.globl symbol; \
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.align 2; \
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.type symbol,@function; \
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.ent symbol,0; \
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symbol: .frame sp, framesize, rpc
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/*
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* END - mark end of function
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*/
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#define END(function) \
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.end function; \
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.size function,.-function
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/*
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* EXPORT - export definition of symbol
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*/
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#define EXPORT(symbol) \
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.globl symbol; \
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symbol:
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/*
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* FEXPORT - export definition of a function symbol
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*/
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#define FEXPORT(symbol) \
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.globl symbol; \
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.type symbol,@function; \
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symbol:
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/*
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* ABS - export absolute symbol
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*/
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#define ABS(symbol,value) \
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.globl symbol; \
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symbol = value
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#define PANIC(msg) \
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.set push; \
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.set reorder; \
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la a0,8f; \
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jal panic; \
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9: b 9b; \
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.set pop; \
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TEXT(msg)
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/*
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* Print formatted string
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*/
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#define PRINT(string) \
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.set push; \
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.set reorder; \
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la a0,8f; \
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jal printk; \
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.set pop; \
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TEXT(string)
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#define TEXT(msg) \
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.data; \
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8: .asciiz msg; \
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.previous;
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/*
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* Build text tables
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*/
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#define TTABLE(string) \
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.text; \
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.word 1f; \
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.previous; \
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.data; \
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1: .asciz string; \
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.previous
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/*
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* MIPS IV pref instruction.
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* Use with .set noreorder only!
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*
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* MIPS IV implementations are free to treat this as a nop. The R5000
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* is one of them. So we should have an option not to use this instruction.
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*/
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#if (_MIPS_ISA == _MIPS_ISA_MIPS4 ) || (_MIPS_ISA == _MIPS_ISA_MIPS5) || \
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(_MIPS_ISA == _MIPS_ISA_MIPS64)
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#define PREF(hint,addr) \
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pref hint,addr
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#define PREFX(hint,addr) \
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prefx hint,addr
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#else
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#define PREF
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#define PREFX
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#endif
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/*
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* MIPS ISA IV/V movn/movz instructions and equivalents for older CPUs.
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*/
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#if (_MIPS_ISA == _MIPS_ISA_MIPS1)
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#define MOVN(rd,rs,rt) \
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.set push; \
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.set noreorder; \
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beqz rt,9f; \
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move rd,rs; \
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.set pop; \
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9:
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#define MOVZ(rd,rs,rt) \
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.set push; \
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.set noreorder; \
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bnez rt,9f; \
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move rd,rt; \
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.set pop; \
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9:
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#endif /* _MIPS_ISA == _MIPS_ISA_MIPS1 */
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#if (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3)
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#define MOVN(rd,rs,rt) \
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.set push; \
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.set noreorder; \
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bnezl rt,9f; \
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move rd,rs; \
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.set pop; \
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9:
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#define MOVZ(rd,rs,rt) \
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.set push; \
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.set noreorder; \
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beqzl rt,9f; \
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movz rd,rs; \
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.set pop; \
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9:
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#endif /* (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3) */
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#if (_MIPS_ISA == _MIPS_ISA_MIPS4 ) || (_MIPS_ISA == _MIPS_ISA_MIPS5) || \
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(_MIPS_ISA == _MIPS_ISA_MIPS64)
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#define MOVN(rd,rs,rt) \
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movn rd,rs,rt
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#define MOVZ(rd,rs,rt) \
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movz rd,rs,rt
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#endif /* MIPS IV, MIPS V or MIPS64 */
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/*
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* Stack alignment
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*/
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#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2) || \
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(_MIPS_ISA == _MIPS_ISA_MIPS32)
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#define ALSZ 7
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#define ALMASK ~7
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#endif
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#if (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \
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(_MIPS_ISA == _MIPS_ISA_MIPS5) || (_MIPS_ISA == _MIPS_ISA_MIPS64)
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#define ALSZ 15
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#define ALMASK ~15
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#endif
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/*
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* Size of a register
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*/
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#ifdef __mips64
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#define SZREG 8
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#else
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#define SZREG 4
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#endif
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/*
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* Use the following macros in assemblercode to load/store registers,
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* pointers etc.
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*/
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#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2) || \
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(_MIPS_ISA == _MIPS_ISA_MIPS32)
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#define REG_S sw
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#define REG_L lw
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#define PTR_SUBU subu
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#define PTR_ADDU addu
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#endif
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#if (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \
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(_MIPS_ISA == _MIPS_ISA_MIPS5) || (_MIPS_ISA == _MIPS_ISA_MIPS64)
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#define REG_S sd
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#define REG_L ld
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/* We still live in a 32 bit address space ... */
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#define PTR_SUBU subu
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#define PTR_ADDU addu
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#endif
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/*
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* How to add/sub/load/store/shift C int variables.
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*/
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#if (_MIPS_SZINT == 32)
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#define INT_ADD add
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#define INT_ADDI addi
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#define INT_ADDU addu
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#define INT_ADDIU addiu
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#define INT_SUB add
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#define INT_SUBI subi
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#define INT_SUBU subu
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#define INT_SUBIU subu
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#define INT_L lw
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#define INT_S sw
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#define LONG_SLL sll
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#define LONG_SLLV sllv
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#define LONG_SRL srl
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#define LONG_SRLV srlv
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#define LONG_SRA sra
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#define LONG_SRAV srav
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#endif
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#if (_MIPS_SZINT == 64)
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#define INT_ADD dadd
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#define INT_ADDI daddi
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#define INT_ADDU daddu
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#define INT_ADDIU daddiu
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#define INT_SUB dadd
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#define INT_SUBI dsubi
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#define INT_SUBU dsubu
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#define INT_SUBIU dsubu
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#define INT_L ld
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#define INT_S sd
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#define LONG_SLL dsll
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#define LONG_SLLV dsllv
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#define LONG_SRL dsrl
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#define LONG_SRLV dsrlv
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#define LONG_SRA dsra
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#define LONG_SRAV dsrav
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#endif
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/*
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* How to add/sub/load/store/shift C long variables.
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*/
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#if (_MIPS_SZLONG == 32)
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#define LONG_ADD add
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#define LONG_ADDI addi
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#define LONG_ADDU addu
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#define LONG_ADDIU addiu
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#define LONG_SUB add
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#define LONG_SUBI subi
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#define LONG_SUBU subu
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#define LONG_SUBIU subu
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#define LONG_L lw
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#define LONG_S sw
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#define LONG_SLL sll
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#define LONG_SLLV sllv
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#define LONG_SRL srl
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#define LONG_SRLV srlv
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#define LONG_SRA sra
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#define LONG_SRAV srav
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#endif
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#if (_MIPS_SZLONG == 64)
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#define LONG_ADD dadd
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#define LONG_ADDI daddi
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#define LONG_ADDU daddu
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#define LONG_ADDIU daddiu
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#define LONG_SUB dadd
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#define LONG_SUBI dsubi
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#define LONG_SUBU dsubu
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#define LONG_SUBIU dsubu
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#define LONG_L ld
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#define LONG_S sd
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#define LONG_SLL dsll
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#define LONG_SLLV dsllv
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#define LONG_SRL dsrl
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#define LONG_SRLV dsrlv
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#define LONG_SRA dsra
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#define LONG_SRAV dsrav
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#endif
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/*
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* How to add/sub/load/store/shift pointers.
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*/
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#if (_MIPS_SZLONG == 32)
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#define PTR_ADD add
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#define PTR_ADDI addi
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#define PTR_ADDU addu
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#define PTR_ADDIU addiu
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#define PTR_SUB add
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#define PTR_SUBI subi
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#define PTR_SUBU subu
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#define PTR_SUBIU subu
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#define PTR_L lw
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#define PTR_S sw
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#define PTR_SLL sll
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#define PTR_SLLV sllv
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#define PTR_SRL srl
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#define PTR_SRLV srlv
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#define PTR_SRA sra
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#define PTR_SRAV srav
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#define PTR_SCALESHIFT 2
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#endif
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#if (_MIPS_SZLONG == 64)
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#define PTR_ADD dadd
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#define PTR_ADDI daddi
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#define PTR_ADDU daddu
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#define PTR_ADDIU daddiu
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#define PTR_SUB dadd
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#define PTR_SUBI dsubi
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#define PTR_SUBU dsubu
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#define PTR_SUBIU dsubu
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#define PTR_L ld
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#define PTR_S sd
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#define PTR_SLL dsll
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#define PTR_SLLV dsllv
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#define PTR_SRL dsrl
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#define PTR_SRLV dsrlv
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#define PTR_SRA dsra
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#define PTR_SRAV dsrav
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#define PTR_SCALESHIFT 3
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#endif
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/*
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* Some cp0 registers were extended to 64bit for MIPS III.
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*/
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#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2) || \
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(_MIPS_ISA == _MIPS_ISA_MIPS32)
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#define MFC0 mfc0
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#define MTC0 mtc0
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#endif
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#if (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \
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(_MIPS_ISA == _MIPS_ISA_MIPS5) || (_MIPS_ISA == _MIPS_ISA_MIPS64)
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#define MFC0 dmfc0
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#define MTC0 dmtc0
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#endif
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#endif /* __ASM_ASM_H */
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