LXR 6.1/​bsps/​mips/​shared/​gdbstub/​mips_opcode.h	Source navigation Diff markup Identifier search General search
	Version: 6.1 Revert   Change

File indexing completed on 2025-05-11 08:23:51

 /**
  * @file
  * @ingroup
  * @brief Instruction formats and opcode values for MIPS
  */
 
 /*
  * Copyright (c) 1992 The Regents of the University of California.
  * All rights reserved.
  *
  * This code is derived from software contributed to Berkeley by
  * Ralph Campbell.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
  *  This product includes software developed by the University of
  *  California, Berkeley and its contributors.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
  * from: @(#)mips_opcode.h  7.1 (Berkeley) 3/19/92
  * via: mips_opcode.h,v 1.1 1994/03/10 16:15:10 (algorithmics)
  */
 
 /*
  * Define the instruction formats and opcode values for the
  * MIPS instruction set.
  */
 
 #ifndef _MIPS_OPCODE_H
 #define _MIPS_OPCODE_H
 
 /**
  * @defgroup mips_ops MIPS Opcodes
  * @ingroup RTEMSBSPsMIPSShared
  * @brief MIPS Instruction Formats and Opcode Values
  * @{
  */
 
 /**
  * @name Instruction formats
  * @{
  */
 
 typedef union {
     unsigned word;
 
 #ifdef MIPSEL
     struct {
     unsigned imm: 16;
     unsigned rt: 5;
     unsigned rs: 5;
     unsigned op: 6;
     } IType;
 
     struct {
     unsigned target: 26;
     unsigned op: 6;
     } JType;
 
     struct {
     unsigned func: 6;
     unsigned shamt: 5;
     unsigned rd: 5;
     unsigned rt: 5;
     unsigned rs: 5;
     unsigned op: 6;
     } RType;
 
     struct {
     unsigned func: 6;
     unsigned fd: 5;
     unsigned fs: 5;
     unsigned ft: 5;
     unsigned fmt: 4;
     unsigned : 1;       /* always '1' */
     unsigned op: 6;     /* always '0x11' */
     } FRType;
 #else
     struct {
     unsigned op: 6;
     unsigned rs: 5;
     unsigned rt: 5;
     unsigned imm: 16;
     } IType;
 
     struct {
     unsigned op: 6;
     unsigned target: 26;
     } JType;
 
     struct {
     unsigned op: 6;
     unsigned rs: 5;
     unsigned rt: 5;
     unsigned rd: 5;
     unsigned shamt: 5;
     unsigned func: 6;
     } RType;
 
     struct {
     unsigned op: 6;     /* always '0x11' */
     unsigned : 1;       /* always '1' */
     unsigned fmt: 4;
     unsigned func: 6;
     unsigned ft: 5;
     unsigned fs: 5;
     unsigned fd: 5;
     } FRType;
 #endif
 } InstFmt;
 
 /** @} */
 
 /**
  * @name 'op' field values
  * @{
  */
 
 #define OP_SPECIAL  000
 #define OP_REGIMM   001
 #define OP_J        002
 #define OP_JAL      003
 #define OP_BEQ      004
 #define OP_BNE      005
 #define OP_BLEZ     006
 #define OP_BGTZ     007
 
 #define OP_ADDI     010
 #define OP_ADDIU    011
 #define OP_SLTI     012
 #define OP_SLTIU    013
 #define OP_ANDI     014
 #define OP_ORI      015
 #define OP_XORI     016
 #define OP_LUI      017
 
 #define OP_COP0     020
 #define OP_COP1     021
 #define OP_COP2     022
 #define OP_BEQL     024
 #define OP_BNEL     025
 #define OP_BLEZL    026
 #define OP_BGTZL    027
 
 #define OP_DADDI    030
 #define OP_DADDIU   031
 #define OP_LDL      032
 #define OP_LDR      033
 
 #define OP_LB       040
 #define OP_LH       041
 #define OP_LWL      042
 #define OP_LW       043
 #define OP_LBU      044
 #define OP_LHU      045
 #define OP_LWR      046
 #define OP_LWU      047
 
 #define OP_SB       050
 #define OP_SH       051
 #define OP_SWL      052
 #define OP_SW       053
 #define OP_SDL      054
 #define OP_SDR      055
 #define OP_SWR      056
 #define OP_CACHE    057
 
 #define OP_LL       060
 #define OP_LWC1     061
 #define OP_LWC2     062
 #define OP_LLD      064
 #define OP_LDC1     065
 #define OP_LDC2     066
 #define OP_LD       067
 
 #define OP_SC       070
 #define OP_SWC1     071
 #define OP_SWC2     072
 #define OP_SCD      074
 #define OP_SDC1     075
 #define OP_SDC2     076
 #define OP_SD       077
 
 /**
  * @name 'func' field values when 'op' == OP_SPECIAL.
  * @{
  */
 
 #define OP_SLL      000
 #define OP_SRL      002
 #define OP_SRA      003
 #define OP_SLLV     004
 #define OP_SRLV     006
 #define OP_SRAV     007
 
 #define OP_JR       010
 #define OP_JALR     011
 #define OP_SYSCALL  014
 #define OP_BREAK    015
 #define OP_SYNC     017
 
 #define OP_MFHI     020
 #define OP_MTHI     021
 #define OP_MFLO     022
 #define OP_MTLO     023
 #define OP_DSLLV    024
 #define OP_DSRLV    026
 #define OP_DSRAV    027
 
 #define OP_MULT     030
 #define OP_MULTU    031
 #define OP_DIV      032
 #define OP_DIVU     033
 #define OP_DMULT    034
 #define OP_DMULTU   035
 #define OP_DDIV     036
 #define OP_DDIVU    037
 
 #define OP_ADD      040
 #define OP_ADDU     041
 #define OP_SUB      042
 #define OP_SUBU     043
 #define OP_AND      044
 #define OP_OR       045
 #define OP_XOR      046
 #define OP_NOR      047
 
 #define OP_SLT      052
 #define OP_SLTU     053
 #define OP_DADD     054
 #define OP_DADDU    055
 #define OP_DSUB     056
 #define OP_DSUBU    057
 
 #define OP_TGE      060
 #define OP_TGEU     061
 #define OP_TLT      062
 #define OP_TLTU     063
 #define OP_TEQ      064
 #define OP_TNE      066
 
 #define OP_DSLL     070
 #define OP_DSRL     072
 #define OP_DSRA     073
 #define OP_DSLL32   074
 #define OP_DSRL32   076
 #define OP_DSRA32   077
 
 /** @} */
 
 /**
  * 'func' field values when 'op' == OP_REGIMM.
  * @{
  */
 
 #define OP_BLTZ     000
 #define OP_BGEZ     001
 #define OP_BLTZL    002
 #define OP_BGEZL    003
 
 #define OP_TGEI     010
 #define OP_TGEIU    011
 #define OP_TLTI     012
 #define OP_TLTIU    013
 #define OP_TEQI     014
 #define OP_TNEI     016
 
 #define OP_BLTZAL   020
 #define OP_BGEZAL   021
 #define OP_BLTZALL  022
 #define OP_BGEZALL  023
 
 /** @} */
 
 /**
  * @name 'rs' field values when 'op' == OP_COPz.
  * @{
  */
 
 #define OP_MF       000
 #define OP_DMF      001
 #define OP_CF       002
 #define OP_MT       004
 #define OP_DMT      005
 #define OP_CT       006
 #define OP_BC       010
 
 /** @} */
 
 /**
  * @name 'rt' field values when 'op' == OP_COPz and 'rt' == OP_BC.
  * @{
  */
 
 #define COPz_BCF    0x00
 #define COPz_BCT    0x01
 #define COPz_BCFL   0x02
 #define COPz_BCTL   0x03
 
 /** @} */
 
 /**
  * @name Instructions with specal significance to debuggers.
  * @{
  */
 
 #define BREAK_INSTR 0x0000000d  ///< @brief instruction code for break
 #define NOP_INSTR   0x00000000  ///< @brief instruction code for no-op
 
 /** @} */
 
 /** @} */
 
 #endif  /* _MIPS_OPCODE_H */

This page was automatically generated by the 2.3.7 LXR engine. The LXR team