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[/] [or1k/] [tags/] [VER_5_3/] [gdb-5.3/] [opcodes/] [dlx-dis.c] - Rev 1782
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/* Instruction printing code for the DLX Microprocessor Copyright 2002 Free Software Foundation, Inc. Contributed by Kuang Hwa Lin. Written by Kuang Hwa Lin, 03/2002. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "sysdep.h" #include "dis-asm.h" #include "opcode/dlx.h" #define R_ERROR 0x1 #define R_TYPE 0x2 #define ILD_TYPE 0x3 #define IST_TYPE 0x4 #define IAL_TYPE 0x5 #define IBR_TYPE 0x6 #define IJ_TYPE 0x7 #define IJR_TYPE 0x8 #define NIL 0x9 #define OPC(x) ((x >> 26) & 0x3F) #define FUNC(x) (x & 0x7FF) unsigned char opc, rs1, rs2, rd; unsigned long imm26, imm16, func, current_insn_addr; static unsigned char dlx_get_opcode PARAMS ((unsigned long)); static unsigned char dlx_get_rs1 PARAMS ((unsigned long)); static unsigned char dlx_get_rs2 PARAMS ((unsigned long)); static unsigned char dlx_get_rdR PARAMS ((unsigned long)); static unsigned long dlx_get_func PARAMS ((unsigned long)); static unsigned long dlx_get_imm16 PARAMS ((unsigned long)); static unsigned long dlx_get_imm26 PARAMS ((unsigned long)); static void operand_deliminator PARAMS ((struct disassemble_info *, char *)); static unsigned char dlx_r_type PARAMS ((struct disassemble_info *)); static unsigned char dlx_load_type PARAMS ((struct disassemble_info *)); static unsigned char dlx_store_type PARAMS ((struct disassemble_info *)); static unsigned char dlx_aluI_type PARAMS ((struct disassemble_info *)); static unsigned char dlx_br_type PARAMS ((struct disassemble_info *)); static unsigned char dlx_jmp_type PARAMS ((struct disassemble_info *)); static unsigned char dlx_jr_type PARAMS ((struct disassemble_info *)); /* Print one instruction from MEMADDR on INFO->STREAM. Return the size of the instruction (always 4 on dlx). */ static unsigned char dlx_get_opcode (opcode) unsigned long opcode; { return (unsigned char) ((opcode >> 26) & 0x3F); } static unsigned char dlx_get_rs1 (opcode) unsigned long opcode; { return (unsigned char) ((opcode >> 21) & 0x1F); } static unsigned char dlx_get_rs2 (opcode) unsigned long opcode; { return (unsigned char) ((opcode >> 16) & 0x1F); } static unsigned char dlx_get_rdR (opcode) unsigned long opcode; { return (unsigned char) ((opcode >> 11) & 0x1F); } static unsigned long dlx_get_func (opcode) unsigned long opcode; { return (unsigned char) (opcode & 0x7FF); } static unsigned long dlx_get_imm16 (opcode) unsigned long opcode; { return (unsigned long) (opcode & 0xFFFF); } static unsigned long dlx_get_imm26 (opcode) unsigned long opcode; { return (unsigned long) (opcode & 0x03FFFFFF); } /* Fill the opcode to the max length. */ static void operand_deliminator (info, ptr) struct disassemble_info *info; char *ptr; { int difft = 8 - (int) strlen (ptr); while (difft > 0) { (*info->fprintf_func) (info->stream, "%c", ' '); difft -= 1; } } /* Process the R-type opcode. */ static unsigned char dlx_r_type (info) struct disassemble_info *info; { unsigned char r_opc[] = { OPC(ALUOP) }; /* Fix ME */ int r_opc_num = (sizeof r_opc) / (sizeof (char)); struct _r_opcode { unsigned long func; char *name; } dlx_r_opcode[] = { { NOPF, "nop" }, /* NOP */ { ADDF, "add" }, /* Add */ { ADDUF, "addu" }, /* Add Unsigned */ { SUBF, "sub" }, /* SUB */ { SUBUF, "subu" }, /* Sub Unsigned */ { MULTF, "mult" }, /* MULTIPLY */ { MULTUF, "multu" }, /* MULTIPLY Unsigned */ { DIVF, "div" }, /* DIVIDE */ { DIVUF, "divu" }, /* DIVIDE Unsigned */ { ANDF, "and" }, /* AND */ { ORF, "or" }, /* OR */ { XORF, "xor" }, /* Exclusive OR */ { SLLF, "sll" }, /* SHIFT LEFT LOGICAL */ { SRAF, "sra" }, /* SHIFT RIGHT ARITHMETIC */ { SRLF, "srl" }, /* SHIFT RIGHT LOGICAL */ { SEQF, "seq" }, /* Set if equal */ { SNEF, "sne" }, /* Set if not equal */ { SLTF, "slt" }, /* Set if less */ { SGTF, "sgt" }, /* Set if greater */ { SLEF, "sle" }, /* Set if less or equal */ { SGEF, "sge" }, /* Set if greater or equal */ { SEQUF, "sequ" }, /* Set if equal */ { SNEUF, "sneu" }, /* Set if not equal */ { SLTUF, "sltu" }, /* Set if less */ { SGTUF, "sgtu" }, /* Set if greater */ { SLEUF, "sleu" }, /* Set if less or equal */ { SGEUF, "sgeu" }, /* Set if greater or equal */ { MVTSF, "mvts" }, /* Move to special register */ { MVFSF, "mvfs" }, /* Move from special register */ { BSWAPF, "bswap" }, /* Byte swap ?? */ { LUTF, "lut" } /* ????????? ?? */ }; int dlx_r_opcode_num = (sizeof dlx_r_opcode) / (sizeof dlx_r_opcode[0]); int idx; for (idx = 0; idx < r_opc_num; idx++) { if (r_opc[idx] != opc) continue; else break; } if (idx == r_opc_num) return NIL; for (idx = 0 ; idx < dlx_r_opcode_num; idx++) if (dlx_r_opcode[idx].func == func) { (*info->fprintf_func) (info->stream, "%s", dlx_r_opcode[idx].name); if (func != NOPF) { /* This is not a nop. */ operand_deliminator (info, dlx_r_opcode[idx].name); (*info->fprintf_func) (info->stream, "r%d,", (int)rd); (*info->fprintf_func) (info->stream, "r%d", (int)rs1); if (func != MVTSF && func != MVFSF) (*info->fprintf_func) (info->stream, ",r%d", (int)rs2); } return (unsigned char) R_TYPE; } return (unsigned char) R_ERROR; } /* Process the memory read opcode. */ static unsigned char dlx_load_type (info) struct disassemble_info* info; { struct _load_opcode { unsigned long opcode; char *name; } dlx_load_opcode[] = { { OPC(LHIOP), "lhi" }, /* Load HI to register. */ { OPC(LBOP), "lb" }, /* load byte sign extended. */ { OPC(LBUOP), "lbu" }, /* load byte unsigned. */ { OPC(LSBUOP),"ldstbu"}, /* load store byte unsigned. */ { OPC(LHOP), "lh" }, /* load halfword sign extended. */ { OPC(LHUOP), "lhu" }, /* load halfword unsigned. */ { OPC(LSHUOP),"ldsthu"}, /* load store halfword unsigned. */ { OPC(LWOP), "lw" }, /* load word. */ { OPC(LSWOP), "ldstw" } /* load store word. */ }; int dlx_load_opcode_num = (sizeof dlx_load_opcode) / (sizeof dlx_load_opcode[0]); int idx; for (idx = 0 ; idx < dlx_load_opcode_num; idx++) if (dlx_load_opcode[idx].opcode == opc) { if (opc == OPC (LHIOP)) { (*info->fprintf_func) (info->stream, "%s", dlx_load_opcode[idx].name); operand_deliminator (info, dlx_load_opcode[idx].name); (*info->fprintf_func) (info->stream, "r%d,", (int)rs2); (*info->fprintf_func) (info->stream, "0x%04x", (int)imm16); } else { (*info->fprintf_func) (info->stream, "%s", dlx_load_opcode[idx].name); operand_deliminator (info, dlx_load_opcode[idx].name); (*info->fprintf_func) (info->stream, "r%d,", (int)rs2); (*info->fprintf_func) (info->stream, "0x%04x[r%d]", (int)imm16, (int)rs1); } return (unsigned char) ILD_TYPE; } return (unsigned char) NIL; } /* Process the memory store opcode. */ static unsigned char dlx_store_type (info) struct disassemble_info* info; { struct _store_opcode { unsigned long opcode; char *name; } dlx_store_opcode[] = { { OPC(SBOP), "sb" }, /* Store byte. */ { OPC(SHOP), "sh" }, /* Store halfword. */ { OPC(SWOP), "sw" }, /* Store word. */ }; int dlx_store_opcode_num = (sizeof dlx_store_opcode) / (sizeof dlx_store_opcode[0]); int idx; for (idx = 0 ; idx < dlx_store_opcode_num; idx++) if (dlx_store_opcode[idx].opcode == opc) { (*info->fprintf_func) (info->stream, "%s", dlx_store_opcode[idx].name); operand_deliminator (info, dlx_store_opcode[idx].name); (*info->fprintf_func) (info->stream, "0x%04x[r%d],", (int)imm16, (int)rs1); (*info->fprintf_func) (info->stream, "r%d", (int)rs2); return (unsigned char) IST_TYPE; } return (unsigned char) NIL; } /* Process the Arithmetic and Logical I-TYPE opcode. */ static unsigned char dlx_aluI_type (info) struct disassemble_info* info; { struct _aluI_opcode { unsigned long opcode; char *name; } dlx_aluI_opcode[] = { { OPC(ADDIOP), "addi" }, /* Store byte. */ { OPC(ADDUIOP), "addui" }, /* Store halfword. */ { OPC(SUBIOP), "subi" }, /* Store word. */ { OPC(SUBUIOP), "subui" }, /* Store word. */ { OPC(ANDIOP), "andi" }, /* Store word. */ { OPC(ORIOP), "ori" }, /* Store word. */ { OPC(XORIOP), "xori" }, /* Store word. */ { OPC(SLLIOP), "slli" }, /* Store word. */ { OPC(SRAIOP), "srai" }, /* Store word. */ { OPC(SRLIOP), "srli" }, /* Store word. */ { OPC(SEQIOP), "seqi" }, /* Store word. */ { OPC(SNEIOP), "snei" }, /* Store word. */ { OPC(SLTIOP), "slti" }, /* Store word. */ { OPC(SGTIOP), "sgti" }, /* Store word. */ { OPC(SLEIOP), "slei" }, /* Store word. */ { OPC(SGEIOP), "sgei" }, /* Store word. */ { OPC(SEQUIOP), "sequi" }, /* Store word. */ { OPC(SNEUIOP), "sneui" }, /* Store word. */ { OPC(SLTUIOP), "sltui" }, /* Store word. */ { OPC(SGTUIOP), "sgtui" }, /* Store word. */ { OPC(SLEUIOP), "sleui" }, /* Store word. */ { OPC(SGEUIOP), "sgeui" }, /* Store word. */ #if 0 { OPC(MVTSOP), "mvts" }, /* Store word. */ { OPC(MVFSOP), "mvfs" }, /* Store word. */ #endif }; int dlx_aluI_opcode_num = (sizeof dlx_aluI_opcode) / (sizeof dlx_aluI_opcode[0]); int idx; for (idx = 0 ; idx < dlx_aluI_opcode_num; idx++) if (dlx_aluI_opcode[idx].opcode == opc) { (*info->fprintf_func) (info->stream, "%s", dlx_aluI_opcode[idx].name); operand_deliminator (info, dlx_aluI_opcode[idx].name); (*info->fprintf_func) (info->stream, "r%d,", (int)rs2); (*info->fprintf_func) (info->stream, "r%d,", (int)rs1); (*info->fprintf_func) (info->stream, "0x%04x", (int)imm16); return (unsigned char) IAL_TYPE; } return (unsigned char) NIL; } /* Process the branch instruction. */ static unsigned char dlx_br_type (info) struct disassemble_info* info; { struct _br_opcode { unsigned long opcode; char *name; } dlx_br_opcode[] = { { OPC(BEQOP), "beqz" }, /* Store byte. */ { OPC(BNEOP), "bnez" } /* Store halfword. */ }; int dlx_br_opcode_num = (sizeof dlx_br_opcode) / (sizeof dlx_br_opcode[0]); int idx; for (idx = 0 ; idx < dlx_br_opcode_num; idx++) if (dlx_br_opcode[idx].opcode == opc) { if (imm16 & 0x00008000) imm16 |= 0xFFFF0000; imm16 += (current_insn_addr + 4); (*info->fprintf_func) (info->stream, "%s", dlx_br_opcode[idx].name); operand_deliminator (info, dlx_br_opcode[idx].name); (*info->fprintf_func) (info->stream, "r%d,", (int)rs1); (*info->fprintf_func) (info->stream, "0x%08x", (int)imm16); return (unsigned char) IBR_TYPE; } return (unsigned char) NIL; } /* Process the jump instruction. */ static unsigned char dlx_jmp_type (info) struct disassemble_info* info; { struct _jmp_opcode { unsigned long opcode; char *name; } dlx_jmp_opcode[] = { { OPC(JOP), "j" }, /* Store byte. */ { OPC(JALOP), "jal" }, /* Store halfword. */ { OPC(BREAKOP), "break" }, /* Store halfword. */ { OPC(TRAPOP), "trap" }, /* Store halfword. */ { OPC(RFEOP), "rfe" } /* Store halfword. */ }; int dlx_jmp_opcode_num = (sizeof dlx_jmp_opcode) / (sizeof dlx_jmp_opcode[0]); int idx; for (idx = 0 ; idx < dlx_jmp_opcode_num; idx++) if (dlx_jmp_opcode[idx].opcode == opc) { if (imm26 & 0x02000000) imm26 |= 0xFC000000; imm26 += (current_insn_addr + 4); (*info->fprintf_func) (info->stream, "%s", dlx_jmp_opcode[idx].name); operand_deliminator (info, dlx_jmp_opcode[idx].name); (*info->fprintf_func) (info->stream, "0x%08x", (int)imm26); return (unsigned char) IJ_TYPE; } return (unsigned char) NIL; } /* Process the jump register instruction. */ static unsigned char dlx_jr_type (info) struct disassemble_info* info; { struct _jr_opcode { unsigned long opcode; char *name; } dlx_jr_opcode[] = { { OPC(JROP), "jr" }, /* Store byte. */ { OPC(JALROP), "jalr" } /* Store halfword. */ }; int dlx_jr_opcode_num = (sizeof dlx_jr_opcode) / (sizeof dlx_jr_opcode[0]); int idx; for (idx = 0 ; idx < dlx_jr_opcode_num; idx++) if (dlx_jr_opcode[idx].opcode == opc) { (*info->fprintf_func) (info->stream, "%s", dlx_jr_opcode[idx].name); operand_deliminator (info, dlx_jr_opcode[idx].name); (*info->fprintf_func) (info->stream, "r%d", (int)rs1); return (unsigned char) IJR_TYPE; } return (unsigned char) NIL; } typedef unsigned char (* dlx_insn) PARAMS ((struct disassemble_info *)); /* This is the main DLX insn handling routine. */ int print_insn_dlx (memaddr, info) bfd_vma memaddr; struct disassemble_info* info; { bfd_byte buffer[4]; int insn_idx; unsigned long insn_word; unsigned char rtn_code; unsigned long dlx_insn_type[] = { (unsigned long) dlx_r_type, (unsigned long) dlx_load_type, (unsigned long) dlx_store_type, (unsigned long) dlx_aluI_type, (unsigned long) dlx_br_type, (unsigned long) dlx_jmp_type, (unsigned long) dlx_jr_type, (unsigned long) NULL }; int dlx_insn_type_num = ((sizeof dlx_insn_type) / (sizeof (unsigned long))) - 1; int status = (*info->read_memory_func) (memaddr, (bfd_byte *) &buffer[0], 4, info); if (status != 0) { (*info->memory_error_func) (status, memaddr, info); return -1; } /* Now decode the insn */ insn_word = bfd_getb32 (buffer); opc = dlx_get_opcode (insn_word); rs1 = dlx_get_rs1 (insn_word); rs2 = dlx_get_rs2 (insn_word); rd = dlx_get_rdR (insn_word); func = dlx_get_func (insn_word); imm16= dlx_get_imm16 (insn_word); imm26= dlx_get_imm26 (insn_word); #if 0 printf ("print_insn_big_dlx: opc = 0x%02x\n" " rs1 = 0x%02x\n" " rs2 = 0x%02x\n" " rd = 0x%02x\n" " func = 0x%08x\n" " imm16 = 0x%08x\n" " imm26 = 0x%08x\n", opc, rs1, rs2, rd, func, imm16, imm26); #endif /* Scan through all the insn type and print the insn out. */ rtn_code = 0; current_insn_addr = (unsigned long) memaddr; for (insn_idx = 0; dlx_insn_type[insn_idx] != 0x0; insn_idx++) switch (((dlx_insn) (dlx_insn_type[insn_idx])) (info)) { /* Found the correct opcode */ case R_TYPE: case ILD_TYPE: case IST_TYPE: case IAL_TYPE: case IBR_TYPE: case IJ_TYPE: case IJR_TYPE: return 4; /* Wrong insn type check next one. */ default: case NIL: continue; /* All rest of the return code are not recongnized, treat it as error */ /* we should never get here, I hope! */ case R_ERROR: return -1; } if (insn_idx == dlx_insn_type_num) /* Well, does not recoganize this opcode. */ (*info->fprintf_func) (info->stream, "<%s>", "Unrecognized Opcode"); return 4; }
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