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ppc_disasm.c
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ppc_disasm.c
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/* $VER: ppc_disasm.c V1.4 (29.08.2001)
*
* Disassembler module for the PowerPC microprocessor family
* Copyright (c) 1998-2001 Frank Wille
*
* ppc_disasm.c is freeware and may be freely redistributed as long as
* no modifications are made and nothing is charged for it.
* Non-commercial usage is allowed without any restrictions.
* EVERY PRODUCT OR PROGRAM DERIVED DIRECTLY FROM MY SOURCE MAY NOT BE
* SOLD COMMERCIALLY WITHOUT PERMISSION FROM THE AUTHOR.
*
*
* v1.4 (29.08.2001) phx
* AltiVec support.
* v1.3 (09.03.2001) phx
* Last two operands in 4-operand float instructions were swapped.
* v1.2 (09.11.2000) phx
* Fixed syntax of mffs, mtfsf and mtfsfi.
* v1.1 (19.02.2000) phx
* fabs wasn't recognized.
* v1.0 (30.01.2000) phx
* stfsx, stfdx, lfsx, lfdx, stfsux, stfdux, lfsux, lfdux, etc.
* printed "rd,ra,rb" as operands instead "fd,ra,rb".
* v0.4 (01.06.1999) phx
* 'stwm' shoud have been 'stmw'.
* v0.3 (17.11.1998) phx
* The OE-types (e.g. addo, subfeo, etc.) didn't work for all
* instructions.
* AA-form branches have an absolute destination.
* addze and subfze must not have a third operand.
* sc was not recognized.
* v0.2 (29.05.1998) phx
* Sign error. SUBI got negative immediate values.
* v0.1 (23.05.1998) phx
* First version, which implements all PowerPC instructions.
* v0.0 (09.05.1998) phx
* File created.
*/
#define PPC_DISASM_C
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include "ppc_disasm.h"
static char *trap_condition[32] = {
NULL,"lgt","llt",NULL,"eq","lge","lle",NULL,
"gt",NULL,NULL,NULL,"ge",NULL,NULL,NULL,
"lt",NULL,NULL,NULL,"le",NULL,NULL,NULL,
"ne",NULL,NULL,NULL,NULL,NULL,NULL,NULL
};
static char *cmpname[4] = {
"cmpw","cmpd","cmplw","cmpld"
};
static char *b_ext[4] = {
"","l","a","la"
};
static char *b_condition[8] = {
"ge","le","ne","ns","lt","gt","eq","so"
};
static char *b_decr[16] = {
"nzf","zf",NULL,NULL,"nzt","zt",NULL,NULL,
"nz","z",NULL,NULL,"nz","z",NULL,NULL
};
static char *regsel[2] = {
"","r"
};
static char *oesel[2] = {
"","o"
};
static char *rcsel[2] = {
"","."
};
static char *ldstnames[] = {
"lwz","lwzu","lbz","lbzu","stw","stwu","stb","stbu","lhz","lhzu",
"lha","lhau","sth","sthu","lmw","stmw","lfs","lfsu","lfd","lfdu",
"stfs","stfsu","stfd","stfdu"
};
static char *vmnames[] = {
"mhaddshs","mhraddshs","mladduhm",NULL,"msumubm","msummbm",
"msumuhm","msumuhs","msumshm","msumshs","sel","perm",
"sldoi",NULL,"maddfp","nmsubfp"
};
static void ierror(char *errtxt,...)
/* display internal error and quit program */
{
va_list vl;
fprintf(stderr,"\nINTERNAL ERROR (PPC disassembler): ");
va_start(vl,errtxt);
vfprintf(stderr,errtxt,vl);
va_end(vl);
fprintf(stderr,".\nAborting.\n");
exit(EXIT_FAILURE);
}
static ppc_word swapda(ppc_word w)
{
return ((w&0xfc00ffff)|((w&PPCAMASK)<<5)|((w&PPCDMASK)>>5));
}
static ppc_word swapab(ppc_word w)
{
return ((w&0xffe007ff)|((w&PPCBMASK)<<5)|((w&PPCAMASK)>>5));
}
static void ill(struct DisasmPara_PPC *dp,ppc_word in)
{
strcpy(dp->opcode,".word");
sprintf(dp->operands,"0x%08lx",(unsigned long)in);
dp->flags |= PPCF_ILLEGAL;
}
static void imm(struct DisasmPara_PPC *dp,ppc_word in,int uimm,int type)
/* Generate immediate instruction operand. */
/* type 0: D-mode, D,A,imm */
/* type 1: S-mode, A,S,imm */
/* type 2: S/D register is ignored (trap,cmpi) */
/* type 3: A register is ignored (li) */
{
char *s;
int i = (int)(in & 0xffff);
dp->type = PPCINSTR_IMM;
if (!uimm) {
if (i > 0x7fff)
i -= 0x10000;
}
else
dp->flags |= PPCF_UNSIGNED;
dp->displacement = i;
switch (type) {
case 0:
sprintf(dp->operands,"r%d,r%d,%d",(int)PPCGETD(in),(int)PPCGETA(in),i);
break;
case 1:
sprintf(dp->operands,"r%d,r%d,%d",(int)PPCGETA(in),(int)PPCGETD(in),i);
break;
case 2:
sprintf(dp->operands,"r%d,%d",(int)PPCGETA(in),i);
break;
case 3:
sprintf(dp->operands,"r%d,%d",(int)PPCGETD(in),i);
break;
default:
ierror("imm(): Wrong type");
break;
}
}
static void ra_rb(char *s,ppc_word in)
{
sprintf(s,"r%d,r%d",(int)PPCGETA(in),(int)PPCGETB(in));
}
static char *rd_ra_rb(char *s,ppc_word in,int mask)
{
static const char *fmt = "r%d,";
if (mask) {
if (mask & 4)
s += sprintf(s,fmt,(int)PPCGETD(in));
if (mask & 2)
s += sprintf(s,fmt,(int)PPCGETA(in));
if (mask & 1)
s += sprintf(s,fmt,(int)PPCGETB(in));
*--s = '\0';
}
else
*s = '\0';
return (s);
}
static char *fd_ra_rb(char *s,ppc_word in,int mask)
{
static const char *ffmt = "f%d,";
static const char *rfmt = "r%d,";
if (mask) {
if (mask & 4)
s += sprintf(s,ffmt,(int)PPCGETD(in));
if (mask & 2)
s += sprintf(s,rfmt,(int)PPCGETA(in));
if (mask & 1)
s += sprintf(s,rfmt,(int)PPCGETB(in));
*--s = '\0';
}
else
*s = '\0';
return (s);
}
static char *vd_va_vb(char *s,ppc_word in,int mask)
{
static const char *fmt = "v%d,";
if (mask) {
if (mask & 4)
s += sprintf(s,fmt,(int)PPCGETD(in));
if (mask & 2) {
if (mask & 16) { /* A = SIMM */
int a = PPCGETA(in);
s += sprintf(s,fmt+1,(a>15)?(a-32):a);
}
else if (mask & 8) /* A = UIMM */
s += sprintf(s,fmt+1,(int)PPCGETA(in));
else
s += sprintf(s,fmt,(int)PPCGETA(in));
}
if (mask & 1)
s += sprintf(s,fmt,(int)PPCGETB(in));
*--s = '\0';
}
else
*s = '\0';
return (s);
}
static void trapi(struct DisasmPara_PPC *dp,ppc_word in,unsigned char dmode)
{
char *cnd;
if (cnd = trap_condition[PPCGETD(in)]) {
dp->flags |= dmode;
sprintf(dp->opcode,"t%c%s",dmode?'d':'w',cnd);
imm(dp,in,0,2);
}
else
ill(dp,in);
}
static void cmpi(struct DisasmPara_PPC *dp,ppc_word in,int uimm)
{
char *oper = dp->operands;
int i = (int)PPCGETL(in);
if (i < 2) {
if (i)
dp->flags |= PPCF_64;
sprintf(dp->opcode,"%si",cmpname[uimm*2+i]);
if (i = (int)PPCGETCRD(in)) {
sprintf(oper,"cr%c,",'0'+i);
dp->operands += 4;
}
imm(dp,in,uimm,2);
dp->operands = oper;
}
else
ill(dp,in);
}
static void addi(struct DisasmPara_PPC *dp,ppc_word in,char *ext)
{
if ((in&0x08000000) && !PPCGETA(in)) {
sprintf(dp->opcode,"l%s",ext); /* li, lis */
imm(dp,in,0,3);
}
else {
sprintf(dp->opcode,"%s%s",(in&0x8000)?"sub":"add",ext);
if (in & 0x8000)
in = (in^0xffff) + 1;
imm(dp,in,1,0);
}
}
static int branch(struct DisasmPara_PPC *dp,ppc_word in,
char *bname,int aform,int bdisp)
/* build a branch instr. and return number of chars written to operand */
{
int bo = (int)PPCGETD(in);
int bi = (int)PPCGETA(in);
char y = (char)(bo & 1);
int opercnt = 0;
char *ext = b_ext[aform*2+(int)(in&1)];
if (bdisp < 0)
y ^= 1;
y = y ? '+':'-';
if (bo & 4) {
/* standard case - no decrement */
if (bo & 16) {
/* branch always */
if (PPCGETIDX(in) != 16) {
sprintf(dp->opcode,"b%s%s",bname,ext);
}
else {
sprintf(dp->opcode,"bc%s",ext);
opercnt = sprintf(dp->operands,"%d,%d",bo,bi);
}
}
else {
/* branch conditional */
sprintf(dp->opcode,"b%s%s%s%c",b_condition[((bo&8)>>1)+(bi&3)],
bname,ext,y);
if (bi >= 4)
opercnt = sprintf(dp->operands,"cr%d",bi>>2);
}
}
else {
/* CTR is decremented and checked */
sprintf(dp->opcode,"bd%s%s%s%c",b_decr[bo>>1],bname,ext,y);
if (!(bo & 16))
opercnt = sprintf(dp->operands,"%d",bi);
}
return (opercnt);
}
static void bc(struct DisasmPara_PPC *dp,ppc_word in)
{
int d = (int)(in & 0xfffc);
int offs;
char *oper = dp->operands;
if (d >= 0x8000)
d -= 0x10000;
if (offs = branch(dp,in,"",(in&2)?1:0,d)) {
oper += offs;
*oper++ = ',';
}
if (in & 2) /* AA ? */
sprintf(dp->operands,"0x%lx",(unsigned long)d);
else
sprintf(oper,"0x%lx",(unsigned long)((char *)dp->iaddr + d));
dp->type = PPCINSTR_BRANCH;
dp->displacement = (ppc_word)d;
}
static void bli(struct DisasmPara_PPC *dp,ppc_word in)
{
int d = (int)(in & 0x3fffffc);
if (d >= 0x2000000)
d -= 0x4000000;
sprintf(dp->opcode,"b%s",b_ext[in&3]);
if (in & 2) /* AA ? */
sprintf(dp->operands,"0x%lx",(unsigned long)d);
else
sprintf(dp->operands,"0x%lx",(unsigned long)((char *)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,char *n1,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,char *name,
unsigned char dmode)
{
if (in & (PPCDMASK|PPCAMASK|PPCBMASK|1)) {
ill(dp,in);
}
else {
dp->flags |= dmode;
strcpy(dp->opcode,name);
}
}
static void rlw(struct DisasmPara_PPC *dp,ppc_word in,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,"r%d,r%d,%s%d,%d,%d",a,s,regsel[i],bsh,mb,me);
}
static void ori(struct DisasmPara_PPC *dp,ppc_word in,char *name)
{
strcpy(dp->opcode,name);
imm(dp,in,1,1);
}
static void rld(struct DisasmPara_PPC *dp,ppc_word in,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,"r%d,r%d,%s%d,%d",a,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)
{
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,char *name,int mask,
int smode,int chkoe,int chkrc,unsigned char dmode)
/* standard instruction: xxxx rD,rA,rB */
{
if (chkrc>=0 && (in&1)!=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,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)!=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,"r%d",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,r%d",sr,s);
else
sprintf(dp->operands,"r%d,%d",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;
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;
case 18:
x = "dsisr";
break;
case 19:
x = "dar";
break;
case 22:
x = "dec";
break;
case 25:
x = "sdr1";
break;
case 26:
x = "srr0";
break;
case 27:
x = "srr1";
break;
case 272:
case 273:
case 274:
case 275:
x = "sprg";
spr -= 272;
fmt = 1;
break;
case 280:
x = "asr";
break;
case 282:
x = "ear";
break;
case 284:
x = "tbl";
break;
case 285:
x = "tbu";
break;
case 528:
case 530:
case 532:
case 534:
x = "ibatu";
spr = (spr-528)>>1;
fmt = 1;
break;
case 529:
case 531:
case 533:
case 535:
x = "ibatl";
spr = (spr-529)>>1;
fmt = 1;
break;
case 536:
case 538:
case 540:
case 542:
x = "dbatu";
spr = (spr-536)>>1;
fmt = 1;
break;
case 537:
case 539:
case 541:
case 543:
x = "dbatl";
spr = (spr-537)>>1;
fmt = 1;
break;
case 1013:
x = "dabr";
break;
default:
x = "spr";
fmt = 1;
break;
}
sprintf(dp->opcode,"m%c%s",smode?'t':'f',x);
if (fmt) {
if (smode)
sprintf(dp->operands,"%d,r%d",spr,d);
else
sprintf(dp->operands,"r%d,%d",d,spr);
}
else
sprintf(dp->operands,"r%d",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,"r%d",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,"r%d,r%d,%d",a,s,bsh);
}
static void ldst(struct DisasmPara_PPC *dp,ppc_word in,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);
sprintf(dp->operands,"%c%d,%d(r%d)",reg,s,d,a);
}
static void fdabc(struct DisasmPara_PPC *dp,ppc_word in,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 & 1)
s += sprintf(s,fmt,(int)PPCGETC(in));
else if (!(mask&8))
err |= (int)PPCGETC(in);
if (mask & 2)
s += sprintf(s,fmt,(int)PPCGETB(in));
else if (PPCGETB(in))
err |= (int)PPCGETB(in);
*(s-1) = '\0';
if (err)
ill(dp,in);
}
static void fdab(struct DisasmPara_PPC *dp,ppc_word in,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));
}
}
static void vdab(struct DisasmPara_PPC *dp,ppc_word in,char *name,
int mask,int chkrc)
/* standard AltiVec instruction: vxxx vD,vA,vB */
{
sprintf(dp->opcode,"%s%s",name,rcsel[chkrc&&(in&PPCVRC)]);
vd_va_vb(dp->operands,in,mask);
}
static void vdabc(struct DisasmPara_PPC *dp,ppc_word in)
/* four operands AltiVec instruction: vxxx vD,vA,vB,vC */
{
int nameidx = (in & 0x3f) - 32;
if (vmnames[nameidx]) {
sprintf(dp->opcode,"v%s",vmnames[nameidx]);
sprintf(vd_va_vb(dp->operands,in,7),
(nameidx==12) ? ",%d" : ",v%d", (int)PPCGETC(in));
}
else
ill(dp,in);
}
static void vldst(struct DisasmPara_PPC *dp,ppc_word in,char *name)
{
if (in & 1) {
ill(dp,in);
}
else {
dp->flags |= PPCF_ALTIVEC;
strcpy(dp->opcode,name);
sprintf(dp->operands,"v%d,r%d,r%d",(int)PPCGETD(in),
(int)PPCGETA(in),(int)PPCGETB(in));
}
}
static void dstrm(struct DisasmPara_PPC *dp,ppc_word in,char *name)
{
if (in & 0x01800001) {
ill(dp,in);
}
else {
char *s = dp->operands;;
if (PPCGETIDX2(in) == 822) { /* dss, dssall */
if (PPCGETA(in) || PPCGETB(in)) {
ill(dp,in);
return;
}
sprintf(dp->opcode,"d%s%s",name,(in&PPCDST) ? "all" : "");
}
else {
sprintf(dp->opcode,"d%s%c",name,(in&PPCDST) ? 't' : '\0');
s += sprintf(s,"r%d,r%d,",(int)PPCGETA(in),(int)PPCGETB(in));
}
sprintf(s,"%d",(int)PPCGETSTRM(in));
dp->flags |= PPCF_ALTIVEC;
}
}
#ifdef PPC_GEKKO
static void gps2(struct DisasmPara_PPC *dp,ppc_word in,char *name,short pcount)
{
int d=PPCGETD(in);
int c=PPCGETC(in);
int a=PPCGETA(in);
int b=PPCGETB(in);
sprintf(dp->opcode,"ps_%s",name);
if(pcount == 3)
sprintf(dp->operands,"f%d,f%d,f%d",d,a,c);
else
sprintf(dp->operands,"f%d,f%d,f%d,f%d",d,a,c,b);
}
static void gps(struct DisasmPara_PPC *dp,ppc_word in,char *name,short pcount,short dlength)
{
int d;
if(dlength==5)
d=PPCGETD(in);
else
d=PPCGETCRD(in);
int a=PPCGETA(in);
int b=PPCGETB(in);
sprintf(dp->opcode,"ps_%s",name);
if(pcount == 2)
sprintf(dp->operands,"f%d,f%d",d,b);
else
sprintf(dp->operands,"f%d,f%d,f%d",d,a,b);
}
static void psqx(struct DisasmPara_PPC *dp,ppc_word in,char *name)
{
int a=PPCGETA(in);
int b=PPCGETB(in);
int d=PPCGETD(in);
int w=GEKKOGETW(in);
int i=GEKKOGETI(in);
sprintf(dp->opcode,"psq_%sx",name);
sprintf(dp->operands,"f%d,r%d,r%d,%d,%d",d,a,b,w,i);
}
static void psq(struct DisasmPara_PPC *dp,ppc_word in,char *name)
{
int a=PPCGETA(in);
int d=PPCGETD(in);
int w=GEKKOGETW2(in);
int i=GEKKOGETI2(in);
int v=GEKKOGETV(in);
sprintf(dp->opcode,"psq_%s",name);
sprintf(dp->operands,"f%d,%d(r%d),%d,%d",d,v,a,w,i);
}
#endif
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 */
#ifdef 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 2:
trapi(dp,in,PPCF_64); /* tdi */
break;
case 3:
trapi(dp,in,0); /* twi */
break;
case 4:
dp->flags |= PPCF_ALTIVEC;
#ifndef PPC_GEKKO
if ((in & 0x30) == 0x20) {
/* vxxx vA,vB,vC,vD - four operands instructions */
vdabc(dp,in);
break;
}
#endif
if (in & 1) {
ill(dp,in);
break;
}
switch (PPCGETIDX2(in)<<1) {
#ifdef PPC_GEKKO
case 42:
gps(dp,in,"add",3,5);
break;
case 36:
gps(dp,in,"div",3,5);
break;
case 40:
gps(dp,in,"sub",3,5);
break;
case 1056:
gps(dp,in,"merge00",3,5);
break;
case 1120:
gps(dp,in,"merge01",3,5);
break;
case 1184:
gps(dp,in,"merge10",3,5);
break;