2248 lines
43 KiB
C++
2248 lines
43 KiB
C++
/* $VER: ppc_disasm.c V1.1 (19.02.2000)
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*
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* Disassembler module for the PowerPC microprocessor family
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* Copyright (c) 1998-2000 Frank Wille
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*
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* ppc_disasm.c is freeware and may be freely redistributed as long as
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* no modifications are made and nothing is charged for it.
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* Non-commercial usage is allowed without any restrictions.
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* EVERY PRODUCT OR PROGRAM DERIVED DIRECTLY FROM MY SOURCE MAY NOT BE
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* SOLD COMMERCIALLY WITHOUT PERMISSION FROM THE AUTHOR.
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*
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*
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* v1.2 (31.07.2003) org
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* modified for IBM PowerPC Gekko.
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* v1.1 (19.02.2000) phx
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* fabs wasn't recognized.
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* v1.0 (30.01.2000) phx
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* stfsx, stfdx, lfsx, lfdx, stfsux, stfdux, lfsux, lfdux, etc.
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* printed "rd,ra,rb" as operands instead "fd,ra,rb".
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* v0.4 (01.06.1999) phx
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* 'stwm' shoud have been 'stmw'.
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* v0.3 (17.11.1998) phx
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* The OE-types (e.g. addo, subfeo, etc.) didn't work for all
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* instructions.
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* AA-form branches have an absolute destination.
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* addze and subfze must not have a third operand.
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* sc was not recognized.
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* v0.2 (29.05.1998) phx
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* Sign error. SUBI got negative immediate values.
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* v0.1 (23.05.1998) phx
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* First version, which implements all PowerPC instructions.
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* v0.0 (09.05.1998) phx
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* File created.
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*/
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include "PowerPCDisasm.h"
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namespace PPCDisasm
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{
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/* version/revision */
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#define PPCDISASM_VER 1
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#define PPCDISASM_REV 1
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/* typedefs */
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typedef unsigned long ppc_word;
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#undef BIGENDIAN
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#undef LITTTLEENDIAN
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/* endianess */
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#define LITTLEENDIAN 0
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/* general defines */
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#define PPCIDXMASK 0xfc000000
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#define PPCIDX2MASK 0x000007fe
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#define PPCDMASK 0x03e00000
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#define PPCAMASK 0x001f0000
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#define PPCBMASK 0x0000f800
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#define PPCCMASK 0x000007c0
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#define PPCMMASK 0x0000003e
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#define PPCCRDMASK 0x03800000
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#define PPCCRAMASK 0x001c0000
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#define PPCLMASK 0x00600000
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#define PPCOE 0x00000400
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#define PPCIDXSH 26
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#define PPCDSH 21
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#define PPCASH 16
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#define PPCBSH 11
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#define PPCCSH 6
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#define PPCMSH 1
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#define PPCCRDSH 23
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#define PPCCRASH 18
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#define PPCLSH 21
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#define PPCIDX2SH 1
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#define PPCGETIDX(x) (((x)&PPCIDXMASK)>>PPCIDXSH)
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#define PPCGETD(x) (((x)&PPCDMASK)>>PPCDSH)
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#define PPCGETA(x) (((x)&PPCAMASK)>>PPCASH)
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#define PPCGETB(x) (((x)&PPCBMASK)>>PPCBSH)
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#define PPCGETC(x) (((x)&PPCCMASK)>>PPCCSH)
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#define PPCGETM(x) (((x)&PPCMMASK)>>PPCMSH)
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#define PPCGETCRD(x) (((x)&PPCCRDMASK)>>PPCCRDSH)
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#define PPCGETCRA(x) (((x)&PPCCRAMASK)>>PPCCRASH)
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#define PPCGETL(x) (((x)&PPCLMASK)>>PPCLSH)
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#define PPCGETIDX2(x) (((x)&PPCIDX2MASK)>>PPCIDX2SH)
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/* Disassembler structure, the interface to the application */
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struct DisasmPara_PPC {
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ppc_word *instr; /* pointer to instruction to disassemble */
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ppc_word *iaddr; /* instr.addr., usually the same as instr */
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char *opcode; /* buffer for opcode, min. 10 chars. */
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char *operands; /* operand buffer, min. 24 chars. */
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/* changed by disassembler: */
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unsigned char type; /* type of instruction, see below */
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unsigned char flags; /* additional flags */
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unsigned short sreg; /* register in load/store instructions */
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ppc_word displacement; /* branch- or load/store displacement */
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};
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#define PPCINSTR_OTHER 0 /* no additional info for other instr. */
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#define PPCINSTR_BRANCH 1 /* branch dest. = PC+displacement */
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#define PPCINSTR_LDST 2 /* load/store instruction: displ(sreg) */
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#define PPCINSTR_IMM 3 /* 16-bit immediate val. in displacement */
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#define PPCF_ILLEGAL (1<<0) /* illegal PowerPC instruction */
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#define PPCF_UNSIGNED (1<<1) /* unsigned immediate instruction */
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#define PPCF_SUPER (1<<2) /* supervisor level instruction */
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#define PPCF_64 (1<<3) /* 64-bit only instruction */
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/* ppc_disasm.o prototypes */
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#ifndef PPC_DISASM_C
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extern ppc_word *PPC_Disassemble(struct DisasmPara_PPC *);
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#endif
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static const char *trap_condition[32] = {
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NULL,"lgt","llt",NULL,"eq","lge","lle",NULL,
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"gt",NULL,NULL,NULL,"ge",NULL,NULL,NULL,
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"lt",NULL,NULL,NULL,"le",NULL,NULL,NULL,
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"ne",NULL,NULL,NULL,NULL,NULL,NULL,NULL
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};
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static const char *cmpname[4] = {
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"cmpw","cmpd","cmplw","cmpld"
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};
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static const char *b_ext[4] = {
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"","l","a","la"
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};
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static const char *b_condition[8] = {
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"ge","le","ne","ns","lt","gt","eq","so"
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};
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static const char *b_decr[16] = {
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"nzf","zf",NULL,NULL,"nzt","zt",NULL,NULL,
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"nz","z",NULL,NULL,"nz","z",NULL,NULL
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};
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static const char *regsel[2] = {
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"","r"
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};
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static const char *oesel[2] = {
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"","o"
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};
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static const char *rcsel[2] = {
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"","."
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};
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static const char *ldstnames[] = {
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"lwz","lwzu","lbz","lbzu","stw","stwu","stb","stbu","lhz","lhzu",
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"lha","lhau","sth","sthu","lmw","stmw","lfs","lfsu","lfd","lfdu",
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"stfs","stfsu","stfd","stfdu"
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};
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static const char *regnames[] = {
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"r0", "sp", "rtoc", "r3", "r4", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31"
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};
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static const char *spr_name(int i)
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{
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static char def[8];
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switch(i)
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{
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case 1: return "XER";
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case 8: return "LR";
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case 9: return "CTR";
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case 18: return "DSIR";
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case 19: return "DAR";
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case 22: return "DEC";
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case 25: return "SDR1";
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case 26: return "SRR0";
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case 27: return "SRR1";
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case 272: return "SPRG0";
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case 273: return "SPRG1";
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case 274: return "SPRG2";
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case 275: return "SPRG3";
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case 282: return "EAR";
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case 287: return "PVR";
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case 528: return "IBAT0U";
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case 529: return "IBAT0L";
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case 530: return "IBAT1U";
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case 531: return "IBAT1L";
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case 532: return "IBAT2U";
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case 533: return "IBAT2L";
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case 534: return "IBAT3U";
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case 535: return "IBAT3L";
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case 536: return "DBAT0U";
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case 537: return "DBAT0L";
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case 538: return "DBAT1U";
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case 539: return "DBAT1L";
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case 540: return "DBAT2U";
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case 541: return "DBAT2L";
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case 542: return "DBAT3U";
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case 543: return "DBAT3L";
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case 912: return "GQR0";
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case 913: return "GQR1";
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case 914: return "GQR2";
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case 915: return "GQR3";
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case 916: return "GQR4";
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case 917: return "GQR5";
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case 918: return "GQR6";
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case 919: return "GQR7";
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case 920: return "HID2";
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case 921: return "WPAR";
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case 922: return "DMA_U";
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case 923: return "DMA_L";
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case 936: return "UMMCR0";
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case 937: return "UPMC1";
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case 938: return "UPMC2";
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case 939: return "USIA";
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case 940: return "UMMCR1";
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case 941: return "UPMC3";
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case 942: return "UPMC4";
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case 943: return "USDA";
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case 952: return "MMCR0";
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case 953: return "PMC1";
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case 954: return "PMC2";
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case 955: return "SIA";
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case 956: return "MMCR1";
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case 957: return "PMC3";
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case 958: return "PMC4";
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case 959: return "SDA";
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case 1008: return "HID0";
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case 1009: return "HID1";
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case 1010: return "IABR";
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case 1013: return "DABR";
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case 1017: return "L2CR";
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case 1019: return "ICTC";
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case 1020: return "THRM1";
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case 1021: return "THRM2";
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case 1022: return "THRM3";
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}
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sprintf(def, "%i", i);
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return def;
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}
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static void ierror(const char *errtxt,...)
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/* display internal error and quit program */
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{
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va_list vl;
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fprintf(stderr,"\nINTERNAL ERROR (PPC disassembler): ");
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va_start(vl,errtxt);
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vfprintf(stderr,errtxt,vl);
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va_end(vl);
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fprintf(stderr,".\nAborting.\n");
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exit(1);
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}
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static ppc_word swapda(ppc_word w)
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{
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return ((w&0xfc00ffff)|((w&PPCAMASK)<<5)|((w&PPCDMASK)>>5));
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}
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static ppc_word swapab(ppc_word w)
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{
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return ((w&0xffe007ff)|((w&PPCBMASK)<<5)|((w&PPCAMASK)>>5));
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}
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static void ill(struct DisasmPara_PPC *dp,ppc_word in)
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{
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// strcpy(dp->opcode,".word");
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// sprintf(dp->operands,"0x%08lx",(unsigned long)in);
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strcpy(dp->opcode,"");
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sprintf(dp->operands,"");
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dp->flags |= PPCF_ILLEGAL;
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}
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static void imm(struct DisasmPara_PPC *dp,ppc_word in,int uimm,int type,int hex)
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/* Generate immediate instruction operand. */
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/* type 0: D-mode, D,A,imm */
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/* type 1: S-mode, A,S,imm */
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/* type 2: S/D register is ignored (trap,cmpi) */
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/* type 3: A register is ignored (li) */
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{
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int i = (int)(in & 0xffff);
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dp->type = PPCINSTR_IMM;
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if (!uimm) {
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if (i > 0x7fff)
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i -= 0x10000;
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}
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else
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dp->flags |= PPCF_UNSIGNED;
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dp->displacement = i;
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switch (type) {
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case 0:
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sprintf(dp->operands,"%s, %s, %d",regnames[(int)PPCGETD(in)],regnames[(int)PPCGETA(in)],i);
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break;
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case 1:
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if(hex)
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sprintf(dp->operands,"%s, %s, 0x%.4X",regnames[(int)PPCGETA(in)],regnames[(int)PPCGETD(in)],i);
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else
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sprintf(dp->operands,"%s, %s, %d",regnames[(int)PPCGETA(in)],regnames[(int)PPCGETD(in)],i);
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break;
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case 2:
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sprintf(dp->operands,"%s, %d",regnames[(int)PPCGETA(in)],i);
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break;
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case 3:
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if(hex)
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sprintf(dp->operands,"%s, 0x%.4X",regnames[(int)PPCGETD(in)],i);
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else
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sprintf(dp->operands,"%s, %d",regnames[(int)PPCGETD(in)],i);
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break;
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default:
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ierror("imm(): Wrong type");
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break;
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}
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}
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static void ra_rb(char *s,ppc_word in)
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{
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sprintf(s,"%s, %s",regnames[(int)PPCGETA(in)],regnames[(int)PPCGETB(in)]);
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}
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static char *rd_ra_rb(char *s,ppc_word in,int mask)
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{
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static const char *fmt = "%s, ";
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if (mask) {
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if (mask & 4)
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s += sprintf(s,fmt,regnames[(int)PPCGETD(in)]);
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if (mask & 2)
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s += sprintf(s,fmt,regnames[(int)PPCGETA(in)]);
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if (mask & 1)
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s += sprintf(s,fmt,regnames[(int)PPCGETB(in)]);
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*--s = '\0';
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*--s = '\0';
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}
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else
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*s = '\0';
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return (s);
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}
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static char *fd_ra_rb(char *s,ppc_word in,int mask)
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{
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static const char *ffmt = "f%d,";
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static const char *rfmt = "%s,";
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if (mask) {
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if (mask & 4)
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s += sprintf(s,ffmt,(int)PPCGETD(in));
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if (mask & 2)
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s += sprintf(s,rfmt,regnames[(int)PPCGETA(in)]);
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if (mask & 1)
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s += sprintf(s,rfmt,regnames[(int)PPCGETB(in)]);
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*--s = '\0';
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}
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else
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*s = '\0';
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return (s);
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}
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static void trapi(struct DisasmPara_PPC *dp,ppc_word in,unsigned char dmode)
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{
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const char *cnd;
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if (cnd = trap_condition[PPCGETD(in)]) {
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dp->flags |= dmode;
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sprintf(dp->opcode,"t%c%s",dmode?'d':'w',cnd);
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imm(dp,in,0,2,0);
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}
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else
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ill(dp,in);
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}
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static void cmpi(struct DisasmPara_PPC *dp,ppc_word in,int uimm)
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{
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char *oper = dp->operands;
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int i = (int)PPCGETL(in);
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if (i < 2) {
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if (i)
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dp->flags |= PPCF_64;
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sprintf(dp->opcode,"%si",cmpname[uimm*2+i]);
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if (i = (int)PPCGETCRD(in)) {
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sprintf(oper,"cr%c,",'0'+i);
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dp->operands += 4;
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}
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imm(dp,in,uimm,2,0);
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dp->operands = oper;
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}
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else
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ill(dp,in);
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}
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static void addi(struct DisasmPara_PPC *dp,ppc_word in,const char *ext)
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{
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if ((in&0x08000000) && !PPCGETA(in)) {
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sprintf(dp->opcode,"l%s",ext); /* li, lis */
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if(!strcmp(ext, "i"))
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imm(dp,in,0,3,0);
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else
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imm(dp,in,1,3,1);
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}
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else {
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sprintf(dp->opcode,"%s%s",(in&0x8000)?"sub":"add",ext);
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if (in & 0x8000)
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in = (in^0xffff) + 1;
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imm(dp,in,1,0,0);
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}
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}
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static int branch(struct DisasmPara_PPC *dp,ppc_word in, const char *bname,int aform,int bdisp)
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/* build a branch instr. and return number of chars written to operand */
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{
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int bo = (int)PPCGETD(in);
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int bi = (int)PPCGETA(in);
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char y = (char)(bo & 1);
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int opercnt = 0;
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const char *ext = b_ext[aform*2+(int)(in&1)];
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if (bdisp < 0)
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y ^= 1;
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y = y ? '+':'-';
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if (bo & 4) {
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/* standard case - no decrement */
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if (bo & 16) {
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/* branch always */
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if (PPCGETIDX(in) != 16) {
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sprintf(dp->opcode,"b%s%s",bname,ext);
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}
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else {
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sprintf(dp->opcode,"bc%s",ext);
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opercnt = sprintf(dp->operands,"%d, %d",bo,bi);
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}
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}
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else {
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/* branch conditional */
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sprintf(dp->opcode,"b%s%s%s%c",b_condition[((bo&8)>>1)+(bi&3)],
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bname,ext,y);
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if (bi >= 4)
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opercnt = sprintf(dp->operands,"cr%d",bi>>2);
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}
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}
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else {
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/* CTR is decremented and checked */
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sprintf(dp->opcode,"bd%s%s%s%c",b_decr[bo>>1],bname,ext,y);
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if (!(bo & 16))
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opercnt = sprintf(dp->operands,"%d",bi);
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}
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return (opercnt);
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}
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static void bc(struct DisasmPara_PPC *dp,ppc_word in)
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{
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unsigned long d = (int)(in & 0xfffc);
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int offs;
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char *oper = dp->operands;
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if(d & 0x8000) d |= 0xffff0000;
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|
|
if (offs = branch(dp,in,"",(in&2)?1:0,d)) {
|
|
oper += offs;
|
|
*oper++ = ',';
|
|
}
|
|
if (in & 2) /* AA ? */
|
|
sprintf(dp->operands,"->0x%.8X",(unsigned long)d);
|
|
else
|
|
sprintf(oper,"->0x%.8X",(unsigned long)(*dp->iaddr) + d);
|
|
dp->type = PPCINSTR_BRANCH;
|
|
dp->displacement = (ppc_word)d;
|
|
}
|
|
|
|
|
|
static void bli(struct DisasmPara_PPC *dp,ppc_word in)
|
|
{
|
|
unsigned long d = (unsigned long)(in & 0x3fffffc);
|
|
|
|
if(d & 0x02000000) d |= 0xfc000000;
|
|
|
|
sprintf(dp->opcode,"b%s",b_ext[in&3]);
|
|
if (in & 2) /* AA ? */
|
|
sprintf(dp->operands,"->0x%.8X",(unsigned long)d);
|
|
else
|
|
sprintf(dp->operands,"->0x%.8X",(unsigned long)(*dp->iaddr) + d);
|
|
dp->type = PPCINSTR_BRANCH;
|
|
dp->displacement = (ppc_word)d;
|
|
}
|
|
|
|
|
|
static void mcrf(struct DisasmPara_PPC *dp,ppc_word in,char c)
|
|
{
|
|
if (!(in & 0x0063f801)) {
|
|
sprintf(dp->opcode,"mcrf%c",c);
|
|
sprintf(dp->operands,"cr%d, cr%d",(int)PPCGETCRD(in),(int)PPCGETCRA(in));
|
|
}
|
|
else
|
|
ill(dp,in);
|
|
}
|
|
|
|
|
|
static void crop(struct DisasmPara_PPC *dp,ppc_word in,const char *n1,const char *n2)
|
|
{
|
|
int crd = (int)PPCGETD(in);
|
|
int cra = (int)PPCGETA(in);
|
|
int crb = (int)PPCGETB(in);
|
|
|
|
if (!(in & 1)) {
|
|
sprintf(dp->opcode,"cr%s",(cra==crb && n2)?n2:n1);
|
|
if (cra == crb && n2)
|
|
sprintf(dp->operands,"%d, %d",crd,cra);
|
|
else
|
|
sprintf(dp->operands,"%d, %d, %d",crd,cra,crb);
|
|
}
|
|
else
|
|
ill(dp,in);
|
|
}
|
|
|
|
|
|
static void nooper(struct DisasmPara_PPC *dp,ppc_word in,const char *name,
|
|
unsigned char dmode)
|
|
{
|
|
if (in & (PPCDMASK|PPCAMASK|PPCBMASK|1)) {
|
|
ill(dp,in);
|
|
}
|
|
else {
|
|
dp->flags |= dmode;
|
|
strcpy(dp->opcode,name);
|
|
}
|
|
}
|
|
|
|
|
|
static unsigned int Helper_Mask(int mb, int me)
|
|
{
|
|
//first make 001111111111111 part
|
|
unsigned int begin = 0xFFFFFFFF >> mb;
|
|
//then make 000000000001111 part, which is used to flip the bits of the first one
|
|
unsigned int end = me < 31 ? (0xFFFFFFFF >> (me + 1)) : 0;
|
|
//do the bitflip
|
|
unsigned int mask = begin ^ end;
|
|
//and invert if backwards
|
|
if (me < mb)
|
|
return ~mask;
|
|
else
|
|
return mask;
|
|
}
|
|
|
|
|
|
static void rlw(struct DisasmPara_PPC *dp,ppc_word in,const char *name,int i)
|
|
{
|
|
int s = (int)PPCGETD(in);
|
|
int a = (int)PPCGETA(in);
|
|
int bsh = (int)PPCGETB(in);
|
|
int mb = (int)PPCGETC(in);
|
|
int me = (int)PPCGETM(in);
|
|
|
|
|
|
|
|
sprintf(dp->opcode,"rlw%s%c",name,in&1?'.':'\0');
|
|
sprintf(dp->operands,"%s, %s, %s%d, %d, %d (%08x)",regnames[a],regnames[s],regsel[i],bsh,mb,me,Helper_Mask(mb, me));
|
|
}
|
|
|
|
|
|
static void ori(struct DisasmPara_PPC *dp,ppc_word in,const char *name)
|
|
{
|
|
strcpy(dp->opcode,name);
|
|
imm(dp,in,1,1,1);
|
|
}
|
|
|
|
|
|
static void rld(struct DisasmPara_PPC *dp,ppc_word in,const char *name,int i)
|
|
{
|
|
int s = (int)PPCGETD(in);
|
|
int a = (int)PPCGETA(in);
|
|
int bsh = i ? (int)PPCGETB(in) : (int)(((in&2)<<4)+PPCGETB(in));
|
|
int m = (int)(in&0x7e0)>>5;
|
|
|
|
dp->flags |= PPCF_64;
|
|
sprintf(dp->opcode,"rld%s%c",name,in&1?'.':'\0');
|
|
sprintf(dp->operands,"%s, %s, %s%d, %d",regnames[a],regnames[s],regsel[i],bsh,m);
|
|
}
|
|
|
|
|
|
static void cmp(struct DisasmPara_PPC *dp,ppc_word in)
|
|
{
|
|
char *oper = dp->operands;
|
|
int i = (int)PPCGETL(in);
|
|
|
|
if (i < 2) {
|
|
if (i)
|
|
dp->flags |= PPCF_64;
|
|
strcpy(dp->opcode,cmpname[((in&PPCIDX2MASK)?2:0)+i]);
|
|
if (i = (int)PPCGETCRD(in))
|
|
oper += sprintf(oper,"cr%c,",'0'+i);
|
|
ra_rb(oper,in);
|
|
}
|
|
else
|
|
ill(dp,in);
|
|
}
|
|
|
|
|
|
static void trap(struct DisasmPara_PPC *dp,ppc_word in,unsigned char dmode)
|
|
{
|
|
const char *cnd;
|
|
int to = (int)PPCGETD(in);
|
|
|
|
if (cnd = trap_condition[to]) {
|
|
dp->flags |= dmode;
|
|
sprintf(dp->opcode,"t%c%s",dmode?'d':'w',cnd);
|
|
ra_rb(dp->operands,in);
|
|
}
|
|
else {
|
|
if (to == 31) {
|
|
if (dmode) {
|
|
dp->flags |= dmode;
|
|
strcpy(dp->opcode,"td");
|
|
strcpy(dp->operands,"31,0,0");
|
|
}
|
|
else
|
|
strcpy(dp->opcode,"trap");
|
|
}
|
|
else
|
|
ill(dp,in);
|
|
}
|
|
}
|
|
|
|
|
|
static void dab(struct DisasmPara_PPC *dp,ppc_word in,const char *name,int mask,
|
|
int smode,int chkoe,int chkrc,unsigned char dmode)
|
|
/* standard instruction: xxxx rD,rA,rB */
|
|
{
|
|
if (chkrc>=0 && ((in&1)!=(unsigned)chkrc)) {
|
|
ill(dp,in);
|
|
}
|
|
else {
|
|
dp->flags |= dmode;
|
|
if (smode)
|
|
in = swapda(in); /* rA,rS,rB */
|
|
sprintf(dp->opcode,"%s%s%s",name,
|
|
oesel[chkoe&&(in&PPCOE)],rcsel[(chkrc<0)&&(in&1)]);
|
|
rd_ra_rb(dp->operands,in,mask);
|
|
}
|
|
}
|
|
|
|
|
|
static void rrn(struct DisasmPara_PPC *dp,ppc_word in,const char *name,
|
|
int smode,int chkoe,int chkrc,unsigned char dmode)
|
|
/* Last operand is no register: xxxx rD,rA,NB */
|
|
{
|
|
char *s;
|
|
|
|
if (chkrc>=0 && ((in&1)!=(unsigned)chkrc)) {
|
|
ill(dp,in);
|
|
}
|
|
else {
|
|
dp->flags |= dmode;
|
|
if (smode)
|
|
in = swapda(in); /* rA,rS,NB */
|
|
sprintf(dp->opcode,"%s%s%s",name,
|
|
oesel[chkoe&&(in&PPCOE)],rcsel[(chkrc<0)&&(in&1)]);
|
|
s = rd_ra_rb(dp->operands,in,6);
|
|
sprintf(s,",%d",(int)PPCGETB(in));
|
|
}
|
|
}
|
|
|
|
|
|
static void mtcr(struct DisasmPara_PPC *dp,ppc_word in)
|
|
{
|
|
int s = (int)PPCGETD(in);
|
|
int crm = (int)(in&0x000ff000)>>12;
|
|
char *oper = dp->operands;
|
|
|
|
if (in & 0x00100801) {
|
|
ill(dp,in);
|
|
}
|
|
else {
|
|
sprintf(dp->opcode,"mtcr%c",crm==0xff?'\0':'f');
|
|
if (crm != 0xff)
|
|
oper += sprintf(oper,"0x%02x,",crm);
|
|
sprintf(oper,"%s",regnames[s]);
|
|
}
|
|
}
|
|
|
|
|
|
static void msr(struct DisasmPara_PPC *dp,ppc_word in,int smode)
|
|
{
|
|
int s = (int)PPCGETD(in);
|
|
int sr = (int)(in&0x000f0000)>>16;
|
|
|
|
if (in & 0x0010f801) {
|
|
ill(dp,in);
|
|
}
|
|
else {
|
|
dp->flags |= PPCF_SUPER;
|
|
sprintf(dp->opcode,"m%csr",smode?'t':'f');
|
|
if (smode)
|
|
sprintf(dp->operands,"%d, %s",sr,regnames[s]);
|
|
else
|
|
sprintf(dp->operands,"%s, %d",regnames[s],sr);
|
|
}
|
|
}
|
|
|
|
|
|
static void mspr(struct DisasmPara_PPC *dp,ppc_word in,int smode)
|
|
{
|
|
int d = (int)PPCGETD(in);
|
|
int spr = (int)((PPCGETB(in)<<5)+PPCGETA(in));
|
|
int fmt = 0;
|
|
const char *x;
|
|
|
|
if (in & 1) {
|
|
ill(dp,in);
|
|
}
|
|
|
|
else {
|
|
if (spr!=1 && spr!=8 && spr!=9)
|
|
dp->flags |= PPCF_SUPER;
|
|
switch (spr) {
|
|
case 1:
|
|
x = "xer";
|
|
break;
|
|
case 8:
|
|
x = "lr";
|
|
break;
|
|
case 9:
|
|
x = "ctr";
|
|
break;
|
|
default:
|
|
x = "spr";
|
|
fmt = 1;
|
|
break;
|
|
}
|
|
|
|
sprintf(dp->opcode,"m%c%s",smode?'t':'f',x);
|
|
if (fmt) {
|
|
if (smode)
|
|
sprintf(dp->operands,"%s, %s",spr_name(spr),regnames[d]);
|
|
else
|
|
sprintf(dp->operands,"%s, %s",regnames[d],spr_name(spr));
|
|
}
|
|
else
|
|
sprintf(dp->operands,"%s",regnames[d]);
|
|
}
|
|
}
|
|
|
|
|
|
static void mtb(struct DisasmPara_PPC *dp,ppc_word in)
|
|
{
|
|
int d = (int)PPCGETD(in);
|
|
int tbr = (int)((PPCGETB(in)<<5)+PPCGETA(in));
|
|
char *s = dp->operands;
|
|
char x;
|
|
|
|
if (in & 1) {
|
|
ill(dp,in);
|
|
}
|
|
|
|
else {
|
|
s += sprintf(s,"%s",regnames[d]);
|
|
switch (tbr) {
|
|
case 268:
|
|
x = 'l';
|
|
break;
|
|
case 269:
|
|
x = 'u';
|
|
break;
|
|
default:
|
|
x = '\0';
|
|
dp->flags |= PPCF_SUPER;
|
|
sprintf(s,",%d",tbr);
|
|
break;
|
|
}
|
|
sprintf(dp->opcode,"mftb%c",x);
|
|
}
|
|
}
|
|
|
|
|
|
static void sradi(struct DisasmPara_PPC *dp,ppc_word in)
|
|
{
|
|
int s = (int)PPCGETD(in);
|
|
int a = (int)PPCGETA(in);
|
|
int bsh = (int)(((in&2)<<4)+PPCGETB(in));
|
|
|
|
dp->flags |= PPCF_64;
|
|
sprintf(dp->opcode,"sradi%c",in&1?'.':'\0');
|
|
sprintf(dp->operands,"%s, %s, %d",regnames[a],regnames[s],bsh);
|
|
}
|
|
|
|
static const char *ldst_offs(unsigned long val)
|
|
{
|
|
static char buf[8];
|
|
|
|
if(val == 0)
|
|
{
|
|
return "0";
|
|
}
|
|
else
|
|
{
|
|
if(val & 0x8000)
|
|
{
|
|
sprintf(buf, "-0x%.4X", ((~val) & 0xffff) + 1);
|
|
}
|
|
else
|
|
{
|
|
sprintf(buf, "0x%.4X", val);
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
}
|
|
|
|
static void ldst(struct DisasmPara_PPC *dp,ppc_word in,const char *name,
|
|
char reg,unsigned char dmode)
|
|
{
|
|
int s = (int)PPCGETD(in);
|
|
int a = (int)PPCGETA(in);
|
|
int d = (ppc_word)(in & 0xffff);
|
|
|
|
dp->type = PPCINSTR_LDST;
|
|
dp->flags |= dmode;
|
|
dp->sreg = (short)a;
|
|
// if (d >= 0x8000)
|
|
// d -= 0x10000;
|
|
dp->displacement = (ppc_word)d;
|
|
strcpy(dp->opcode,name);
|
|
if(reg == 'r')
|
|
{
|
|
sprintf(dp->operands,"%s, %s (%s)", regnames[s], ldst_offs(d), regnames[a]);
|
|
}
|
|
else
|
|
{
|
|
sprintf(dp->operands,"%c%d, %s (%s)",reg,s, ldst_offs(d), regnames[a]);
|
|
}
|
|
}
|
|
|
|
|
|
static void fdabc(struct DisasmPara_PPC *dp,ppc_word in, const char *name,
|
|
int mask,unsigned char dmode)
|
|
/* standard floating point instruction: xxxx fD,fA,fC,fB */
|
|
{
|
|
static const char *fmt = "f%d,";
|
|
char *s = dp->operands;
|
|
int err = 0;
|
|
|
|
dp->flags |= dmode;
|
|
sprintf(dp->opcode,"f%s%s",name,rcsel[in&1]);
|
|
s += sprintf(s,fmt,(int)PPCGETD(in));
|
|
if (mask & 4)
|
|
s += sprintf(s,fmt,(int)PPCGETA(in));
|
|
else
|
|
err |= (int)PPCGETA(in);
|
|
if (mask & 2)
|
|
s += sprintf(s,fmt,(int)PPCGETC(in));
|
|
else if (PPCGETC(in))
|
|
err |= (int)PPCGETC(in);
|
|
if (mask & 1)
|
|
s += sprintf(s,fmt,(int)PPCGETB(in));
|
|
else if (!(mask&8))
|
|
err |= (int)PPCGETB(in);
|
|
*(s-1) = '\0';
|
|
if (err)
|
|
ill(dp,in);
|
|
}
|
|
|
|
|
|
static void fdab(struct DisasmPara_PPC *dp,ppc_word in,const char *name,int mask)
|
|
/* indexed float instruction: xxxx fD,rA,rB */
|
|
{
|
|
strcpy(dp->opcode,name);
|
|
fd_ra_rb(dp->operands,in,mask);
|
|
}
|
|
|
|
|
|
static void fcmp(struct DisasmPara_PPC *dp,ppc_word in,char c)
|
|
{
|
|
if (in & 0x00600001) {
|
|
ill(dp,in);
|
|
}
|
|
else {
|
|
sprintf(dp->opcode,"fcmp%c",c);
|
|
sprintf(dp->operands,"cr%d,f%d,f%d",(int)PPCGETCRD(in),
|
|
(int)PPCGETA(in),(int)PPCGETB(in));
|
|
}
|
|
}
|
|
|
|
|
|
static void mtfsb(struct DisasmPara_PPC *dp,ppc_word in,int n)
|
|
{
|
|
if (in & (PPCAMASK|PPCBMASK)) {
|
|
ill(dp,in);
|
|
}
|
|
else {
|
|
sprintf(dp->opcode,"mtfsb%d%s",n,rcsel[in&1]);
|
|
sprintf(dp->operands,"%d",(int)PPCGETD(in));
|
|
}
|
|
}
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////
|
|
//PAIRED
|
|
//////////////////////////////////////////////////////////////////////////////////
|
|
|
|
/*
|
|
sprintf(buf, "psq_lx", FD);
|
|
sprintf(buf, "psq_stx", FD);
|
|
sprintf(buf, "psq_lux", FD);
|
|
sprintf(buf, "psq_stux", FD);
|
|
*/
|
|
#define RA ((inst >> 16) & 0x1f)
|
|
#define RB ((inst >> 11) & 0x1f)
|
|
#define RC ((inst >> 6) & 0x1f)
|
|
#define RD ((inst >> 21) & 0x1f)
|
|
#define RS ((inst >> 21) & 0x1f)
|
|
#define FA ((inst >> 16) & 0x1f)
|
|
#define FB ((inst >> 11) & 0x1f)
|
|
#define FC ((inst >> 6) & 0x1f)
|
|
#define FD ((inst >> 21) & 0x1f)
|
|
#define FS ((inst >> 21) & 0x1f)
|
|
#define IMM (inst & 0xffff)
|
|
#define UIMM (inst & 0xffff)
|
|
#define OFS (inst & 0xffff)
|
|
#define OPCD ((inst >> 26) & 0x3f)
|
|
#define XO_10 ((inst >> 1) & 0x3ff)
|
|
#define XO_9 ((inst >> 1) & 0x1ff)
|
|
#define XO_5 ((inst >> 1) & 0x1f)
|
|
#define Rc (inst & 1)
|
|
#define SH ((inst >> 11) & 0x1f)
|
|
#define MB ((inst >> 6) & 0x1f)
|
|
#define ME ((inst >> 1) & 0x1f)
|
|
#define OE ((inst >> 10) & 1)
|
|
#define TO ((inst >> 21) & 0x1f)
|
|
#define CRFD ((inst >> 23) & 0x7)
|
|
#define CRFS ((inst >> 18) & 0x7)
|
|
#define CRBD ((inst >> 21) & 0x1f)
|
|
#define CRBA ((inst >> 16) & 0x1f)
|
|
#define CRBB ((inst >> 11) & 0x1f)
|
|
#define L ((inst >> 21) & 1)
|
|
#define NB ((inst >> 11) & 0x1f)
|
|
#define AA ((inst >> 1) & 1)
|
|
#define LK (inst & 1)
|
|
#define LI ((inst >> 2) & 0xffffff)
|
|
#define BO ((inst >> 21) & 0x1f)
|
|
#define BI ((inst >> 16) & 0x1f)
|
|
#define BD ((inst >> 2) & 0x3fff)
|
|
|
|
#define MTFSFI_IMM ((inst >> 12) & 0xf)
|
|
#define FM ((inst >> 17) & 0xff)
|
|
#define SR ((inst >> 16) & 0xf)
|
|
#define SPR ((inst >> 11) & 0x3ff)
|
|
#define TBR ((inst >> 11) & 0x3ff)
|
|
#define CRM ((inst >> 12) & 0xff)
|
|
inline int SEX12(unsigned int x)
|
|
{
|
|
return x & 0x800 ? (x|0xFFFFF000) : x;
|
|
}
|
|
|
|
static void ps(struct DisasmPara_PPC *dp,ppc_word inst)
|
|
{
|
|
ppc_word pc = *dp->iaddr;
|
|
char *op = dp->opcode;
|
|
char *pr = dp->operands;
|
|
switch((inst>>1)&0x1F)
|
|
{
|
|
case 6:
|
|
strcpy(op, "ps_lux");
|
|
sprintf(pr, "p%u, (r%u + r%u)", FD, RA, RB);
|
|
return;
|
|
|
|
case 18:
|
|
strcpy(op, "ps_div");
|
|
sprintf(pr, "p%u, p%u/p%u", FD, FA, FB);
|
|
return;
|
|
case 20:
|
|
strcpy(op, "ps_sub");
|
|
sprintf(pr, "p%u, p%u-p%u", FD, FA, FB);
|
|
return;
|
|
case 21:
|
|
strcpy(op, "ps_add");
|
|
sprintf(pr, "p%u, p%u+p%u", FD, FA, FB);
|
|
return;
|
|
case 23:
|
|
strcpy(op, "ps_sel");
|
|
sprintf(pr, "p%u>=0?p%u:p%u", FD, FA, FC, FB);
|
|
return;
|
|
case 24:
|
|
strcpy(op, "ps_res");
|
|
sprintf(pr, "p%u, (1/p%u)", FD, FB);
|
|
return;
|
|
|
|
case 25:
|
|
strcpy(op, "ps_mul");
|
|
sprintf(pr, "p%u, p%u*p%u", FD, FA, FC);
|
|
return;
|
|
|
|
case 26: //rsqrte
|
|
strcpy(op, "ps_rsqrte");
|
|
sprintf(pr, "p%u, p%u", FD, FB);
|
|
return;
|
|
case 28: //msub
|
|
strcpy(op, "ps_msub");
|
|
sprintf(pr, "p%u, p%u*p%u-p%u", FD, FA, FC, FB);
|
|
return;
|
|
case 29: //madd
|
|
strcpy(op, "ps_madd");
|
|
sprintf(pr, "p%u, p%u*p%u+p%u", FD, FA, FC, FB);
|
|
return;
|
|
case 30: //nmsub
|
|
strcpy(op, "ps_nmsub");
|
|
sprintf(pr, "p%u, -(p%u*p%u-p%u)", FD, FA, FC, FB);
|
|
return;
|
|
case 31: //nmadd
|
|
strcpy(op, "ps_nmadd");
|
|
sprintf(pr, "p%u, -(p%u*p%u+p%u)", FD, FA, FC, FB);
|
|
return;
|
|
case 10:
|
|
strcpy(op, "ps_sum0");
|
|
sprintf(pr, "p%u, 0=p%u+p%u, 1=p%u", FD, FA, FB, FC);
|
|
return;
|
|
case 11:
|
|
strcpy(op, "ps_sum1");
|
|
sprintf(pr, "p%u, 0=p%u, 1=p%u+p%u", FD, FC, FA, FB);
|
|
return;
|
|
case 12:
|
|
strcpy(op, "ps_muls0");
|
|
sprintf(pr, "p%u, p%u*p%u[0]", FD, FA, FC);
|
|
return;
|
|
case 13:
|
|
strcpy(op, "ps_muls1");
|
|
sprintf(pr, "p%u, p%u*p%u[1]", FD, FA, FC);
|
|
return;
|
|
case 14:
|
|
strcpy(op, "ps_madds0");
|
|
sprintf(pr, "p%u, p%u*p%u[0]+p%u", FD, FA, FC, FB);
|
|
return;
|
|
case 15:
|
|
strcpy(op, "ps_madds1");
|
|
sprintf(pr, "p%u, p%u*p%u[1]+p%u", FD, FA, FC, FB);
|
|
return;
|
|
}
|
|
|
|
switch((inst>>1)&0x3FF)
|
|
{
|
|
//10-bit suckers (?)
|
|
case 40: //nmadd
|
|
strcpy(op, "ps_neg");
|
|
sprintf(pr, "p%u, -p%u", FD, FB);
|
|
return;
|
|
case 72: //nmadd
|
|
strcpy(op, "ps_mr");
|
|
sprintf(pr, "p%u, p%u", FD, FB);
|
|
return;
|
|
case 136:
|
|
strcpy(op, "ps_nabs");
|
|
sprintf(pr, "p%u, -|p%u|", FD, FB);
|
|
return;
|
|
case 264:
|
|
strcpy(op, "ps_abs");
|
|
sprintf(pr, "p%u, |p%u|", FD, FB);
|
|
return;
|
|
case 0:
|
|
strcpy(op, "ps_cmpu0");
|
|
sprintf(pr, "ps_cmpu0", FD);
|
|
return;
|
|
case 32:
|
|
strcpy(op,"ps_cmpq0");
|
|
sprintf(pr, "ps_cmpo0", FD);
|
|
return;
|
|
case 64:
|
|
strcpy(op,"ps_cmpu1");
|
|
sprintf(pr, "ps_cmpu1", FD);
|
|
return;
|
|
case 96:
|
|
strcpy(op,"ps_cmpo1");
|
|
sprintf(pr, "ps_cmpo1", FD);
|
|
return;
|
|
case 528:
|
|
strcpy(op,"ps_merge00");
|
|
sprintf(pr, "p%u, p%u[0],p%u[0]", FD, FA, FB);
|
|
return;
|
|
case 560:
|
|
strcpy(op,"ps_merge01");
|
|
sprintf(pr, "p%u, p%u[0],p%u[1]", FD, FA, FB);
|
|
return;
|
|
case 592:
|
|
strcpy(op,"ps_merge10");
|
|
sprintf(pr, "p%u, p%u[1],p%u[0]", FD, FA, FB);
|
|
return;
|
|
case 624:
|
|
strcpy(op,"ps_merge11");
|
|
sprintf(pr, "p%u, p%u[1],p%u[1]", FD, FA, FB);
|
|
return;
|
|
case 1014:
|
|
strcpy(op,"dcbz_l");
|
|
sprintf(pr, "");
|
|
return;
|
|
}
|
|
|
|
// default:
|
|
sprintf(op, "ps_%i",((inst>>1)&0x1f));
|
|
strcpy(pr,"---");
|
|
return;
|
|
}
|
|
|
|
static void ps_mem(struct DisasmPara_PPC *dp,ppc_word inst)
|
|
{
|
|
ppc_word pc = *dp->iaddr;
|
|
char *op = dp->opcode;
|
|
char *pr = dp->operands;
|
|
switch(PPCGETIDX(inst))
|
|
{
|
|
case 56:
|
|
strcpy(op,"psq_l");
|
|
sprintf(pr, "p%u, %i(r%u)", RS, SEX12(inst&0xFFF), RA);
|
|
break;
|
|
case 57:
|
|
strcpy(op,"psq_lu");
|
|
sprintf(pr, "", FD);
|
|
break;
|
|
case 60:
|
|
strcpy(op,"psq_st");
|
|
sprintf(pr, "%i(r%u), p%u", SEX12(inst&0xFFF), RA, RS);
|
|
break;
|
|
case 61:
|
|
strcpy(op,"psq_stu");
|
|
sprintf(pr, "r%u, p%u ?", RA, RS);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
ppc_word *PPC_Disassemble(struct DisasmPara_PPC *dp)
|
|
/* Disassemble PPC instruction and return a pointer to the next */
|
|
/* instruction, or NULL if an error occured. */
|
|
{
|
|
ppc_word in = *(dp->instr);
|
|
|
|
if (dp->opcode==NULL || dp->operands==NULL)
|
|
return (NULL); /* no buffers */
|
|
|
|
#if LITTLEENDIAN
|
|
in = (in & 0xff)<<24 | (in & 0xff00)<<8 | (in & 0xff0000)>>8 |
|
|
(in & 0xff000000)>>24;
|
|
#endif
|
|
dp->type = PPCINSTR_OTHER;
|
|
dp->flags = 0;
|
|
*(dp->operands) = 0;
|
|
|
|
switch (PPCGETIDX(in))
|
|
{
|
|
case 1:
|
|
sprintf(dp->opcode,"HLE");
|
|
//HLE call
|
|
break;
|
|
case 2:
|
|
trapi(dp,in,PPCF_64); /* tdi */
|
|
break;
|
|
|
|
case 3:
|
|
trapi(dp,in,0); /* twi */
|
|
break;
|
|
case 4:
|
|
ps(dp,in);
|
|
break;
|
|
case 56:
|
|
case 57:
|
|
case 60:
|
|
case 61:
|
|
ps_mem(dp,in);
|
|
break;
|
|
|
|
|
|
case 7:
|
|
strcpy(dp->opcode,"mulli");
|
|
imm(dp,in,0,0,0);
|
|
break;
|
|
|
|
case 8:
|
|
strcpy(dp->opcode,"subfic");
|
|
imm(dp,in,0,0,0);
|
|
break;
|
|
|
|
case 10:
|
|
cmpi(dp,in,1); /* cmpli */
|
|
break;
|
|
|
|
case 11:
|
|
cmpi(dp,in,0); /* cmpi */
|
|
break;
|
|
|
|
case 12:
|
|
addi(dp,in,"ic"); /* addic */
|
|
break;
|
|
|
|
case 13:
|
|
addi(dp,in,"ic."); /* addic. */
|
|
break;
|
|
|
|
case 14:
|
|
addi(dp,in,"i"); /* addi */
|
|
break;
|
|
|
|
case 15:
|
|
addi(dp,in,"is"); /* addis */
|
|
break;
|
|
|
|
case 16:
|
|
bc(dp,in);
|
|
break;
|
|
|
|
case 17:
|
|
if ((in & ~PPCIDXMASK) == 2)
|
|
strcpy(dp->opcode,"sc");
|
|
else
|
|
ill(dp,in);
|
|
break;
|
|
|
|
case 18:
|
|
bli(dp,in);
|
|
break;
|
|
|
|
case 19:
|
|
switch (PPCGETIDX2(in)) {
|
|
case 0:
|
|
mcrf(dp,in,'\0'); /* mcrf */
|
|
break;
|
|
|
|
case 16:
|
|
branch(dp,in,"lr",0,0); /* bclr */
|
|
break;
|
|
|
|
case 33:
|
|
crop(dp,in,"nor","not"); /* crnor */
|
|
break;
|
|
|
|
case 50:
|
|
nooper(dp,in,"rfi",PPCF_SUPER);
|
|
break;
|
|
|
|
case 129:
|
|
crop(dp,in,"andc",NULL); /* crandc */
|
|
break;
|
|
|
|
case 150:
|
|
nooper(dp,in,"isync",0);
|
|
break;
|
|
|
|
case 193:
|
|
crop(dp,in,"xor","clr"); /* crxor */
|
|
break;
|
|
|
|
case 225:
|
|
crop(dp,in,"nand",NULL); /* crnand */
|
|
break;
|
|
|
|
case 257:
|
|
crop(dp,in,"and",NULL); /* crand */
|
|
break;
|
|
|
|
case 289:
|
|
crop(dp,in,"eqv","set"); /* creqv */
|
|
break;
|
|
|
|
case 417:
|
|
crop(dp,in,"orc",NULL); /* crorc */
|
|
break;
|
|
|
|
case 449:
|
|
crop(dp,in,"or","move"); /* cror */
|
|
break;
|
|
|
|
case 528:
|
|
branch(dp,in,"ctr",0,0); /* bcctr */
|
|
break;
|
|
|
|
default:
|
|
ill(dp,in);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 20:
|
|
rlw(dp,in,"imi",0); /* rlwimi */
|
|
break;
|
|
|
|
case 21:
|
|
rlw(dp,in,"inm",0); /* rlwinm */
|
|
break;
|
|
|
|
case 23:
|
|
rlw(dp,in,"nm",1); /* rlwnm */
|
|
break;
|
|
|
|
case 24:
|
|
if (in & ~PPCIDXMASK)
|
|
ori(dp,in,"ori");
|
|
else
|
|
strcpy(dp->opcode,"nop");
|
|
break;
|
|
|
|
case 25:
|
|
ori(dp,in,"oris");
|
|
break;
|
|
|
|
case 26:
|
|
ori(dp,in,"xori");
|
|
break;
|
|
|
|
case 27:
|
|
ori(dp,in,"xoris");
|
|
break;
|
|
|
|
case 28:
|
|
ori(dp,in,"andi.");
|
|
break;
|
|
|
|
case 29:
|
|
ori(dp,in,"andis.");
|
|
break;
|
|
|
|
case 30:
|
|
switch (in & 0x1c) {
|
|
case 0:
|
|
rld(dp,in,"icl",0); /* rldicl */
|
|
break;
|
|
case 1:
|
|
rld(dp,in,"icr",0); /* rldicr */
|
|
break;
|
|
case 2:
|
|
rld(dp,in,"ic",0); /* rldic */
|
|
break;
|
|
case 3:
|
|
rld(dp,in,"imi",0); /* rldimi */
|
|
break;
|
|
case 4:
|
|
rld(dp,in,in&2?"cl":"cr",1); /* rldcl, rldcr */
|
|
break;
|
|
default:
|
|
ill(dp,in);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 31:
|
|
switch (PPCGETIDX2(in)) {
|
|
case 0:
|
|
case 32:
|
|
if (in & 1)
|
|
ill(dp,in);
|
|
else
|
|
cmp(dp,in); /* cmp, cmpl */
|
|
break;
|
|
|
|
case 4:
|
|
if (in & 1)
|
|
ill(dp,in);
|
|
else
|
|
trap(dp,in,0); /* tw */
|
|
break;
|
|
|
|
case 8:
|
|
case (PPCOE>>1)+8:
|
|
dab(dp,swapab(in),"subc",7,0,1,-1,0);
|
|
break;
|
|
|
|
case 9:
|
|
dab(dp,in,"mulhdu",7,0,0,-1,PPCF_64);
|
|
break;
|
|
|
|
case 10:
|
|
case (PPCOE>>1)+10:
|
|
dab(dp,in,"addc",7,0,1,-1,0);
|
|
break;
|
|
|
|
case 11:
|
|
dab(dp,in,"mulhwu",7,0,0,-1,0);
|
|
break;
|
|
|
|
case 19:
|
|
if (in & (PPCAMASK|PPCBMASK))
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"mfcr",4,0,0,0,0);
|
|
break;
|
|
|
|
case 20:
|
|
dab(dp,in,"lwarx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 21:
|
|
dab(dp,in,"ldx",7,0,0,0,PPCF_64);
|
|
break;
|
|
|
|
case 23:
|
|
dab(dp,in,"lwzx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 24:
|
|
dab(dp,in,"slw",7,1,0,-1,0);
|
|
break;
|
|
|
|
case 26:
|
|
if (in & PPCBMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"cntlzw",6,1,0,-1,0);
|
|
break;
|
|
|
|
case 27:
|
|
dab(dp,in,"sld",7,1,0,-1,PPCF_64);
|
|
break;
|
|
|
|
case 28:
|
|
dab(dp,in,"and",7,1,0,-1,0);
|
|
break;
|
|
|
|
case 40:
|
|
case (PPCOE>>1)+40:
|
|
dab(dp,swapab(in),"sub",7,0,1,-1,0);
|
|
break;
|
|
|
|
case 53:
|
|
dab(dp,in,"ldux",7,0,0,0,PPCF_64);
|
|
break;
|
|
|
|
case 54:
|
|
if (in & PPCDMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"dcbst",3,0,0,0,0);
|
|
break;
|
|
|
|
case 55:
|
|
dab(dp,in,"lwzux",7,0,0,0,0);
|
|
break;
|
|
|
|
case 58:
|
|
if (in & PPCBMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"cntlzd",6,1,0,-1,PPCF_64);
|
|
break;
|
|
|
|
case 60:
|
|
dab(dp,in,"andc",7,1,0,-1,0);
|
|
break;
|
|
|
|
case 68:
|
|
trap(dp,in,PPCF_64); /* td */
|
|
break;
|
|
|
|
case 73:
|
|
dab(dp,in,"mulhd",7,0,0,-1,PPCF_64);
|
|
break;
|
|
|
|
case 75:
|
|
dab(dp,in,"mulhw",7,0,0,-1,0);
|
|
break;
|
|
|
|
case 83:
|
|
if (in & (PPCAMASK|PPCBMASK))
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"mfmsr",4,0,0,0,PPCF_SUPER);
|
|
break;
|
|
|
|
case 84:
|
|
dab(dp,in,"ldarx",7,0,0,0,PPCF_64);
|
|
break;
|
|
|
|
case 86:
|
|
if (in & PPCDMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"dcbf",3,0,0,0,0);
|
|
break;
|
|
|
|
case 87:
|
|
dab(dp,in,"lbzx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 104:
|
|
case (PPCOE>>1)+104:
|
|
if (in & PPCBMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"neg",6,0,1,-1,0);
|
|
break;
|
|
|
|
case 119:
|
|
dab(dp,in,"lbzux",7,0,0,0,0);
|
|
break;
|
|
|
|
case 124:
|
|
if (PPCGETD(in) == PPCGETB(in))
|
|
dab(dp,in,"not",6,1,0,-1,0);
|
|
else
|
|
dab(dp,in,"nor",7,1,0,-1,0);
|
|
break;
|
|
|
|
case 136:
|
|
case (PPCOE>>1)+136:
|
|
dab(dp,in,"subfe",7,0,1,-1,0);
|
|
break;
|
|
|
|
case 138:
|
|
case (PPCOE>>1)+138:
|
|
dab(dp,in,"adde",7,0,1,-1,0);
|
|
break;
|
|
|
|
case 144:
|
|
mtcr(dp,in);
|
|
break;
|
|
|
|
case 146:
|
|
if (in & (PPCAMASK|PPCBMASK))
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"mtmsr",4,0,0,0,PPCF_SUPER);
|
|
break;
|
|
|
|
case 149:
|
|
dab(dp,in,"stdx",7,0,0,0,PPCF_64);
|
|
break;
|
|
|
|
case 150:
|
|
dab(dp,in,"stwcx.",7,0,0,1,0);
|
|
break;
|
|
|
|
case 151:
|
|
dab(dp,in,"stwx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 181:
|
|
dab(dp,in,"stdux",7,0,0,0,PPCF_64);
|
|
break;
|
|
|
|
case 183:
|
|
dab(dp,in,"stwux",7,0,0,0,0);
|
|
break;
|
|
|
|
case 200:
|
|
case (PPCOE>>1)+200:
|
|
if (in & PPCBMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"subfze",6,0,1,-1,0);
|
|
break;
|
|
|
|
case 202:
|
|
case (PPCOE>>1)+202:
|
|
if (in & PPCBMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"addze",6,0,1,-1,0);
|
|
break;
|
|
|
|
case 210:
|
|
msr(dp,in,1); /* mfsr */
|
|
break;
|
|
|
|
case 214:
|
|
dab(dp,in,"stdcx.",7,0,0,1,PPCF_64);
|
|
break;
|
|
|
|
case 215:
|
|
dab(dp,in,"stbx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 232:
|
|
case (PPCOE>>1)+232:
|
|
if (in & PPCBMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"subfme",6,0,1,-1,0);
|
|
break;
|
|
|
|
case 233:
|
|
case (PPCOE>>1)+233:
|
|
dab(dp,in,"mulld",7,0,1,-1,PPCF_64);
|
|
break;
|
|
|
|
case 234:
|
|
case (PPCOE>>1)+234:
|
|
if (in & PPCBMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"addme",6,0,1,-1,0);
|
|
break;
|
|
|
|
case 235:
|
|
case (PPCOE>>1)+235:
|
|
dab(dp,in,"mullw",7,0,1,-1,0);
|
|
break;
|
|
|
|
case 242:
|
|
if (in & PPCAMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"mtsrin",5,0,0,0,PPCF_SUPER);
|
|
break;
|
|
|
|
case 246:
|
|
if (in & PPCDMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"dcbtst",3,0,0,0,0);
|
|
break;
|
|
|
|
case 247:
|
|
dab(dp,in,"stbux",7,0,0,0,0);
|
|
break;
|
|
|
|
case 266:
|
|
case (PPCOE>>1)+266:
|
|
dab(dp,in,"add",7,0,1,-1,0);
|
|
break;
|
|
|
|
case 278:
|
|
if (in & PPCDMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"dcbt",3,0,0,0,0);
|
|
break;
|
|
|
|
case 279:
|
|
dab(dp,in,"lhzx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 284:
|
|
dab(dp,in,"eqv",7,1,0,-1,0);
|
|
break;
|
|
|
|
case 306:
|
|
if (in & (PPCDMASK|PPCAMASK))
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"tlbie",1,0,0,0,PPCF_SUPER);
|
|
break;
|
|
|
|
case 310:
|
|
dab(dp,in,"eciwx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 311:
|
|
dab(dp,in,"lhzux",7,0,0,0,0);
|
|
break;
|
|
|
|
case 316:
|
|
dab(dp,in,"xor",7,1,0,-1,0);
|
|
break;
|
|
|
|
case 339:
|
|
mspr(dp,in,0); /* mfspr */
|
|
break;
|
|
|
|
case 341:
|
|
dab(dp,in,"lwax",7,0,0,0,PPCF_64);
|
|
break;
|
|
|
|
case 343:
|
|
dab(dp,in,"lhax",7,0,0,0,0);
|
|
break;
|
|
|
|
case 370:
|
|
nooper(dp,in,"tlbia",PPCF_SUPER);
|
|
break;
|
|
|
|
case 371:
|
|
mtb(dp,in); /* mftb */
|
|
break;
|
|
|
|
case 373:
|
|
dab(dp,in,"lwaux",7,0,0,0,PPCF_64);
|
|
break;
|
|
|
|
case 375:
|
|
dab(dp,in,"lhaux",7,0,0,0,0);
|
|
break;
|
|
|
|
case 407:
|
|
dab(dp,in,"sthx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 412:
|
|
dab(dp,in,"orc",7,1,0,-1,0);
|
|
break;
|
|
|
|
case 413:
|
|
sradi(dp,in); /* sradi */
|
|
break;
|
|
|
|
case 434:
|
|
if (in & (PPCDMASK|PPCAMASK))
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"slbie",1,0,0,0,PPCF_SUPER|PPCF_64);
|
|
break;
|
|
|
|
case 438:
|
|
dab(dp,in,"ecowx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 439:
|
|
dab(dp,in,"sthux",7,0,0,0,0);
|
|
break;
|
|
|
|
case 444:
|
|
if (PPCGETD(in) == PPCGETB(in))
|
|
dab(dp,in,"mr",6,1,0,-1,0);
|
|
else
|
|
dab(dp,in,"or",7,1,0,-1,0);
|
|
break;
|
|
|
|
case 457:
|
|
case (PPCOE>>1)+457:
|
|
dab(dp,in,"divdu",7,0,1,-1,PPCF_64);
|
|
break;
|
|
|
|
case 459:
|
|
case (PPCOE>>1)+459:
|
|
dab(dp,in,"divwu",7,0,1,-1,0);
|
|
break;
|
|
|
|
case 467:
|
|
mspr(dp,in,1); /* mtspr */
|
|
break;
|
|
|
|
case 470:
|
|
if (in & PPCDMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"dcbi",3,0,0,0,0);
|
|
break;
|
|
|
|
case 476:
|
|
dab(dp,in,"nand",7,1,0,-1,0);
|
|
break;
|
|
|
|
case 489:
|
|
case (PPCOE>>1)+489:
|
|
dab(dp,in,"divd",7,0,1,-1,PPCF_64);
|
|
break;
|
|
|
|
case 491:
|
|
case (PPCOE>>1)+491:
|
|
dab(dp,in,"divw",7,0,1,-1,0);
|
|
break;
|
|
|
|
case 498:
|
|
nooper(dp,in,"slbia",PPCF_SUPER|PPCF_64);
|
|
break;
|
|
|
|
case 512:
|
|
if (in & 0x007ff801)
|
|
ill(dp,in);
|
|
else {
|
|
strcpy(dp->opcode,"mcrxr");
|
|
sprintf(dp->operands,"cr%d",(int)PPCGETCRD(in));
|
|
}
|
|
break;
|
|
|
|
case 533:
|
|
dab(dp,in,"lswx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 534:
|
|
dab(dp,in,"lwbrx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 535:
|
|
fdab(dp,in,"lfsx",7);
|
|
break;
|
|
|
|
case 536:
|
|
dab(dp,in,"srw",7,1,0,-1,0);
|
|
break;
|
|
|
|
case 539:
|
|
dab(dp,in,"srd",7,1,0,-1,PPCF_64);
|
|
break;
|
|
|
|
case 566:
|
|
nooper(dp,in,"tlbsync",PPCF_SUPER);
|
|
break;
|
|
|
|
case 567:
|
|
fdab(dp,in,"lfsux",7);
|
|
break;
|
|
|
|
case 595:
|
|
msr(dp,in,0); /* mfsr */
|
|
break;
|
|
|
|
case 597:
|
|
rrn(dp,in,"lswi",0,0,0,0);
|
|
break;
|
|
|
|
case 598:
|
|
nooper(dp,in,"sync",PPCF_SUPER);
|
|
break;
|
|
|
|
case 599:
|
|
fdab(dp,in,"lfdx",7);
|
|
break;
|
|
|
|
case 631:
|
|
fdab(dp,in,"lfdux",7);
|
|
break;
|
|
|
|
case 659:
|
|
if (in & PPCAMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"mfsrin",5,0,0,0,PPCF_SUPER);
|
|
break;
|
|
|
|
case 661:
|
|
dab(dp,in,"stswx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 662:
|
|
dab(dp,in,"stwbrx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 663:
|
|
fdab(dp,in,"stfsx",7);
|
|
break;
|
|
|
|
case 695:
|
|
fdab(dp,in,"stfsux",7);
|
|
break;
|
|
|
|
case 725:
|
|
rrn(dp,in,"stswi",0,0,0,0);
|
|
break;
|
|
|
|
case 727:
|
|
fdab(dp,in,"stfdx",7);
|
|
break;
|
|
|
|
case 759:
|
|
fdab(dp,in,"stfdux",7);
|
|
break;
|
|
|
|
case 790:
|
|
dab(dp,in,"lhbrx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 792:
|
|
dab(dp,in,"sraw",7,1,0,-1,0);
|
|
break;
|
|
|
|
case 794:
|
|
dab(dp,in,"srad",7,1,0,-1,PPCF_64);
|
|
break;
|
|
|
|
case 824:
|
|
rrn(dp,in,"srawi",1,0,-1,0);
|
|
break;
|
|
|
|
case 854:
|
|
nooper(dp,in,"eieio",PPCF_SUPER);
|
|
break;
|
|
|
|
case 918:
|
|
dab(dp,in,"sthbrx",7,0,0,0,0);
|
|
break;
|
|
|
|
case 922:
|
|
if (in & PPCBMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"extsh",6,1,0,-1,0);
|
|
break;
|
|
|
|
case 954:
|
|
if (in & PPCBMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"extsb",6,1,0,-1,0);
|
|
break;
|
|
|
|
case 982:
|
|
if (in & PPCDMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"icbi",3,0,0,0,0);
|
|
break;
|
|
|
|
case 983:
|
|
fdab(dp,in,"stfiwx",7);
|
|
break;
|
|
|
|
case 986:
|
|
if (in & PPCBMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"extsw",6,1,0,-1,PPCF_64);
|
|
break;
|
|
|
|
case 1014:
|
|
if (in & PPCDMASK)
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"dcbz",3,0,0,0,0);
|
|
break;
|
|
|
|
default:
|
|
ill(dp,in);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 32:
|
|
case 33:
|
|
case 34:
|
|
case 35:
|
|
case 36:
|
|
case 37:
|
|
case 38:
|
|
case 39:
|
|
case 40:
|
|
case 41:
|
|
case 42:
|
|
case 43:
|
|
case 44:
|
|
case 45:
|
|
case 46:
|
|
case 47:
|
|
ldst(dp,in,ldstnames[PPCGETIDX(in)-32],'r',0);
|
|
break;
|
|
|
|
case 48:
|
|
case 49:
|
|
case 50:
|
|
case 51:
|
|
case 52:
|
|
case 53:
|
|
case 54:
|
|
case 55:
|
|
ldst(dp,in,ldstnames[PPCGETIDX(in)-32],'f',0);
|
|
break;
|
|
|
|
case 58:
|
|
switch (in & 3) {
|
|
case 0:
|
|
ldst(dp,in&~3,"ld",'r',PPCF_64);
|
|
break;
|
|
case 1:
|
|
ldst(dp,in&~3,"ldu",'r',PPCF_64);
|
|
break;
|
|
case 2:
|
|
ldst(dp,in&~3,"lwa",'r',PPCF_64);
|
|
break;
|
|
default:
|
|
ill(dp,in);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 59:
|
|
switch (in & 0x3e) {
|
|
case 36:
|
|
fdabc(dp,in,"divs",6,0);
|
|
break;
|
|
|
|
case 40:
|
|
fdabc(dp,in,"subs",6,0);
|
|
break;
|
|
|
|
case 42:
|
|
fdabc(dp,in,"adds",6,0);
|
|
break;
|
|
|
|
case 44:
|
|
fdabc(dp,in,"sqrts",2,0);
|
|
break;
|
|
|
|
case 48:
|
|
fdabc(dp,in,"res",2,0);
|
|
break;
|
|
|
|
case 50:
|
|
fdabc(dp,in,"muls",5,0);
|
|
break;
|
|
|
|
case 56:
|
|
fdabc(dp,in,"msubs",7,0);
|
|
break;
|
|
|
|
case 58:
|
|
fdabc(dp,in,"madds",7,0);
|
|
break;
|
|
|
|
case 60:
|
|
fdabc(dp,in,"nmsubs",7,0);
|
|
break;
|
|
|
|
case 62:
|
|
fdabc(dp,in,"nmadds",7,0);
|
|
break;
|
|
|
|
default:
|
|
ill(dp,in);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 62:
|
|
switch (in & 3) {
|
|
case 0:
|
|
ldst(dp,in&~3,"std",'r',PPCF_64);
|
|
break;
|
|
case 1:
|
|
ldst(dp,in&~3,"stdu",'r',PPCF_64);
|
|
break;
|
|
default:
|
|
ill(dp,in);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 63:
|
|
if (in & 32) {
|
|
switch (in & 0x1e) {
|
|
case 4:
|
|
fdabc(dp,in,"div",6,0);
|
|
break;
|
|
|
|
case 8:
|
|
fdabc(dp,in,"sub",6,0);
|
|
break;
|
|
|
|
case 10:
|
|
fdabc(dp,in,"add",6,0);
|
|
break;
|
|
|
|
case 12:
|
|
fdabc(dp,in,"sqrt",2,0);
|
|
break;
|
|
|
|
case 14:
|
|
fdabc(dp,in,"sel",7,0);
|
|
break;
|
|
|
|
case 18:
|
|
fdabc(dp,in,"mul",5,0);
|
|
break;
|
|
|
|
case 20:
|
|
fdabc(dp,in,"rsqrte",2,0);
|
|
break;
|
|
|
|
case 24:
|
|
fdabc(dp,in,"msub",7,0);
|
|
break;
|
|
|
|
case 26:
|
|
fdabc(dp,in,"madd",7,0);
|
|
break;
|
|
|
|
case 28:
|
|
fdabc(dp,in,"nmsub",7,0);
|
|
break;
|
|
|
|
case 30:
|
|
fdabc(dp,in,"nmadd",7,0);
|
|
break;
|
|
|
|
default:
|
|
ill(dp,in);
|
|
break;
|
|
}
|
|
}
|
|
|
|
else {
|
|
switch (PPCGETIDX2(in)) {
|
|
case 0:
|
|
fcmp(dp,in,'u');
|
|
break;
|
|
|
|
case 12:
|
|
fdabc(dp,in,"rsp",10,0);
|
|
break;
|
|
|
|
case 14:
|
|
fdabc(dp,in,"ctiw",10,0);
|
|
break;
|
|
|
|
case 15:
|
|
fdabc(dp,in,"ctiwz",10,0);
|
|
break;
|
|
|
|
case 32:
|
|
fcmp(dp,in,'o');
|
|
break;
|
|
|
|
case 38:
|
|
mtfsb(dp,in,1);
|
|
break;
|
|
|
|
case 40:
|
|
fdabc(dp,in,"neg",10,0);
|
|
break;
|
|
|
|
case 64:
|
|
mcrf(dp,in,'s'); /* mcrfs */
|
|
break;
|
|
|
|
case 70:
|
|
mtfsb(dp,in,0);
|
|
break;
|
|
|
|
case 72:
|
|
fdabc(dp,in,"mr",10,0);
|
|
break;
|
|
|
|
case 134:
|
|
if (!(in & 0x006f0800)) {
|
|
sprintf(dp->opcode,"mtfsfi%s",rcsel[in&1]);
|
|
sprintf(dp->operands,"cr%d,%d",(int)PPCGETCRD(in),
|
|
(int)(in & 0xf000)>>12);
|
|
}
|
|
else
|
|
ill(dp,in);
|
|
break;
|
|
|
|
case 136:
|
|
fdabc(dp,in,"nabs",10,0);
|
|
break;
|
|
|
|
case 264:
|
|
fdabc(dp,in,"abs",10,0);
|
|
break;
|
|
|
|
case 583:
|
|
if (in & (PPCAMASK|PPCBMASK))
|
|
ill(dp,in);
|
|
else
|
|
dab(dp,in,"mffs",4,0,0,-1,0);
|
|
break;
|
|
|
|
case 711:
|
|
if (!(in & 0x02010000)) {
|
|
sprintf(dp->opcode,"mtfsf%s",rcsel[in&1]);
|
|
sprintf(dp->operands,"0x%x,%d",
|
|
(unsigned)(in & 0x01fe)>>17,(int)PPCGETB(in));
|
|
}
|
|
else
|
|
ill(dp,in);
|
|
break;
|
|
|
|
case 814:
|
|
fdabc(dp,in,"fctid",10,PPCF_64);
|
|
break;
|
|
|
|
case 815:
|
|
fdabc(dp,in,"fctidz",10,PPCF_64);
|
|
break;
|
|
|
|
case 846:
|
|
fdabc(dp,in,"fcfid",10,PPCF_64);
|
|
break;
|
|
|
|
default:
|
|
ill(dp,in);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ill(dp,in);
|
|
break;
|
|
}
|
|
return (dp->instr + 1);
|
|
}
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
// simplified interface
|
|
|
|
const char *DisassembleGekko(unsigned int opcode, unsigned int curInstAddr)
|
|
{
|
|
char opcodeStr[64], operandStr[64];
|
|
PPCDisasm::DisasmPara_PPC dp;
|
|
static char buf[128];
|
|
static unsigned int opc, adr;
|
|
|
|
opc = opcode;
|
|
adr = curInstAddr;
|
|
|
|
dp.opcode = opcodeStr;
|
|
dp.operands = operandStr;
|
|
dp.instr = (PPCDisasm::ppc_word *)&opc;
|
|
dp.iaddr = (PPCDisasm::ppc_word *)&adr;
|
|
|
|
PPCDisasm::PPC_Disassemble(&dp);
|
|
|
|
//sprintf(buf, "%-10s %s", opcodeStr, operandStr);
|
|
sprintf(buf, "%s\t%s", opcodeStr, operandStr);
|
|
return buf;
|
|
}
|
|
|
|
|
|
static const char *gprnames[] =
|
|
{
|
|
"r00", "r01", "r02", "r03", "r04", "r05", "r06", "r07",
|
|
"r08", "r09", "r10", "r11", "r12", "r13", "r14", "r15",
|
|
"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
|
|
"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31"
|
|
};
|
|
|
|
const char *GetGPRName(unsigned int index)
|
|
{
|
|
if (index < 32)
|
|
return gprnames[index];
|
|
return 0;
|
|
}
|