/*
 * 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, 2001 by Ralf Baechle
 * Copyright (C) 1999 by Silicon Graphics, Inc.
 * Copyright (C) 2001 MIPS Technologies, Inc.
 * Copyright (C) 2002  Maciej W. Rozycki
 *
 * 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 <asm/sgidefs.h>

#ifndef CAT
#ifdef __STDC__
#define __CAT(str1, str2) str1##str2
#else
#define __CAT(str1, str2) str1/**/str2
#endif
#define CAT(str1, str2) __CAT(str1, str2)
#endif

/*
 * 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;                        \
		PTR_LA	a0, 8f;                          \
		jal	panic;                          \
9:		b	9b;                             \
		.set	pop;				\
		TEXT(msg)

/*
 * Print formatted string
 */
#ifdef CONFIG_PRINTK
#define PRINT(string)                                   \
		.set	push;				\
		.set	reorder;                        \
		PTR_LA	a0, 8f;                          \
		jal	printk;                         \
		.set	pop;				\
		TEXT(string)
#else
#define PRINT(string)
#endif

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

/*
 * Build text tables
 */
#define TTABLE(string)                                  \
		.pushsection .text;			\
		.word	1f;                             \
		.popsection				\
		.pushsection .data;			\
1:		.asciiz	string;                         \
		.popsection

#if !defined(__m4180)
#define MOVN(rd, rs, rt)                                \
		movn	rd, rs, rt
#define MOVZ(rd, rs, rt)                                \
		movz	rd, rs, rt
#else
#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,rs;                          \
        .set    pop;                \
9:
#endif

/*
 * Stack alignment
 */
#define ALSZ	7
#define ALMASK	~7

/*
 * Macros to handle different pointer/register sizes for 32/64-bit code
 */

/*
 * 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_LI		li
#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

#define SSNOP		sll zero, zero, 1

#endif /* __ASM_ASM_H */