/* $Id: asm.h,v 1.2 1999/12/04 03:59:12 ralf Exp $ * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1995, 1996, 1997, 1999 by Ralf Baechle * Copyright (C) 1999 by Silicon Graphics, Inc. * * Some useful macros for MIPS assembler code * * Some of the routines below contain useless nops that will be optimized * away by gas in -O mode. These nops are however required to fill delay * slots in noreorder mode. */ #ifndef _ASM_ASM_H #define _ASM_ASM_H #include /* * PIC specific declarations * Not used for the kernel but here seems to be the right place. */ #ifdef __PIC__ #define CPRESTORE(register) \ .cprestore register #define CPADD(register) \ .cpadd register #define CPLOAD(register) \ .cpload register #else #define CPRESTORE(register) #define CPADD(register) #define CPLOAD(register) #endif /* * 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: /* * ABS - export absolute symbol */ #define ABS(symbol,value) \ .globl symbol; \ symbol = value #define PANIC(msg) \ .set push; \ .set reorder; \ la a0,8f; \ jal panic; \ 9: b 9b; \ .set pop; \ TEXT(msg) /* * Print formatted string */ #define PRINT(string) \ .set push; \ .set reorder; \ la a0,8f; \ jal printk; \ .set pop; \ TEXT(string) /* * Print formatted string */ #define PROM_PRINT(string) \ .set push; \ .set reorder; \ la a0,8f; \ jal prom_printf; \ .set pop; \ TEXT(string) #define TEXT(msg) \ .data; \ 8: .asciiz msg; \ .previous; /* * Build text tables */ #define TTABLE(string) \ .text; \ .word 1f; \ .previous; \ .data; \ 1: .asciz string; \ .previous /* * MIPS IV pref instruction. * Use with .set noreorder only! * * MIPS IV implementations are free to treat this as a nop. The R5000 * is one of them. So we should have an option not to use this instruction. */ #if (_MIPS_ISA == _MIPS_ISA_MIPS4) || (_MIPS_ISA == _MIPS_ISA_MIPS5) #define PREF(hint,addr) \ pref hint,addr #define PREFX(hint,addr) \ prefx hint,addr #else #define PREF #define PREFX #endif /* * MIPS ISA IV/V movn/movz instructions and equivalents for older CPUs. */ #if _MIPS_ISA == _MIPS_ISA_MIPS1 #define MOVN(rd,rs,rt) \ .set push; \ .set reorder; \ beqz rt,9f; \ move rd,rs; \ .set pop; \ 9: #define MOVZ(rd,rs,rt) \ .set push; \ .set reorder; \ bnez rt,9f; \ move rd,rt; \ .set pop; \ 9: #endif /* _MIPS_ISA == _MIPS_ISA_MIPS1 */ #if (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3) #define MOVN(rd,rs,rt) \ .set push; \ .set noreorder; \ bnezl rt,9f; \ move rd,rs; \ .set pop; \ 9: #define MOVZ(rd,rs,rt) \ .set push; \ .set noreorder; \ beqzl rt,9f; \ movz rd,rs; \ .set pop; \ 9: #endif /* (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3) */ #if (_MIPS_ISA == _MIPS_ISA_MIPS4) || (_MIPS_ISA == _MIPS_ISA_MIPS5) #define MOVN(rd,rs,rt) \ movn rd,rs,rt #define MOVZ(rd,rs,rt) \ movz rd,rs,rt #endif /* (_MIPS_ISA == _MIPS_ISA_MIPS4) || (_MIPS_ISA == _MIPS_ISA_MIPS5) */ /* * Stack alignment */ #if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2) #define ALSZ 7 #define ALMASK ~7 #endif #if (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \ (_MIPS_ISA == _MIPS_ISA_MIPS5) #define ALSZ 15 #define ALMASK ~15 #endif /* * Size of a register */ #ifdef __mips64 #define SZREG 8 #else #define SZREG 4 #endif /* * Use the following macros in assemblercode to load/store registers, * pointers etc. */ #if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2) #define REG_S sw #define REG_L lw #define PTR_SUBU dsubu #define PTR_ADDU daddu #endif #if (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \ (_MIPS_ISA == _MIPS_ISA_MIPS5) #define REG_S sd #define REG_L ld /* We still live in a 32 bit address space ... */ #define PTR_SUBU dsubu #define PTR_ADDU daddu #endif /* * How to add/sub/load/store/shift C int variables. */ #if (_MIPS_SZINT == 32) #define INT_ADD add #define INT_ADDI addi #define INT_ADDU addu #define INT_ADDIU addiu #define INT_SUB add #define INT_SUBI subi #define INT_SUBU subu #define INT_SUBIU subu #define INT_L lw #define INT_S sw #endif #if (_MIPS_SZINT == 64) #define INT_ADD dadd #define INT_ADDI daddi #define INT_ADDU daddu #define INT_ADDIU daddiu #define INT_SUB dadd #define INT_SUBI dsubi #define INT_SUBU dsubu #define INT_SUBIU dsubu #define INT_L ld #define INT_S sd #endif /* * How to add/sub/load/store/shift C long variables. */ #if (_MIPS_SZLONG == 32) #define LONG_ADD add #define LONG_ADDI addi #define LONG_ADDU addu #define LONG_ADDIU addiu #define LONG_SUB add #define LONG_SUBI subi #define LONG_SUBU subu #define LONG_SUBIU 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 #endif #if (_MIPS_SZLONG == 64) #define LONG_ADD dadd #define LONG_ADDI daddi #define LONG_ADDU daddu #define LONG_ADDIU daddiu #define LONG_SUB dadd #define LONG_SUBI dsubi #define LONG_SUBU dsubu #define LONG_SUBIU dsubu #define LONG_L ld #define LONG_S sd #define LONG_SLL dsll #define LONG_SLLV dsllv #define LONG_SRL dsrl #define LONG_SRLV dsrlv #define LONG_SRA dsra #define LONG_SRAV dsrav #endif /* * How to add/sub/load/store/shift pointers. */ #if (_MIPS_SZPTR == 32) #define PTR_ADD add #define PTR_ADDI addi #define PTR_ADDU addu #define PTR_ADDIU addiu #define PTR_SUB add #define PTR_SUBI subi #define PTR_SUBU subu #define PTR_SUBIU subu #define PTR_L lw #define PTR_S sw #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 #endif #if (_MIPS_SZPTR == 64) #define PTR_ADD dadd #define PTR_ADDI daddi #define PTR_ADDU daddu #define PTR_ADDIU daddiu #define PTR_SUB dadd #define PTR_SUBI dsubi #define PTR_SUBU dsubu #define PTR_SUBIU dsubu #define PTR_L ld #define PTR_S sd #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 #endif /* * Some cp0 registers were extended to 64bit for MIPS III. */ #if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2) #define MFC0 mfc0 #define MTC0 mtc0 #endif #if (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \ (_MIPS_ISA == _MIPS_ISA_MIPS5) #define MFC0 dmfc0 #define MTC0 dmtc0 #endif #endif /* _ASM_ASM_H */