ref: f88a55e79b5bf656e7f9578d1318a955b9a4963a
dir: /sys/src/cmd/jl/asm.c/
#include "l.h"
#define Sym Aoutsym
#include <a.out.h>
#undef Sym
long OFFSET;
xlong
entryvalue(void)
{
char *a;
Sym *s;
a = INITENTRY;
if(*a >= '0' && *a <= '9')
return atolwhex(a);
s = lookup(a, 0);
if(s->type == 0)
return INITTEXT;
if(s->type != STEXT && s->type != SLEAF)
diag("entry not text: %s", s->name);
return s->value + INITTEXT;
}
void
asmb(void)
{
Prog *p;
long t, etext;
Optab *o;
if(debug['v'])
Bprint(&bso, "%5.2f asm\n", cputime());
Bflush(&bso);
OFFSET = HEADR;
seek(cout, OFFSET, 0);
pc = 0;
for(p = firstp; p != P; p = p->link) {
if(p->as == ATEXT) {
/* align on word boundary */
if(!debug['c'] && (pc & 2) != 0){
nopalign.pc = pc;
pc += asmout(&nopalign, oplook(&nopalign), 0);
}
curtext = p;
autosize = p->to.offset + ptrsize;
}
if(p->pc != pc) {
diag("phase error %lux sb %lux",
p->pc, pc);
if(!debug['a'])
prasm(curp);
pc = p->pc;
}
curp = p;
o = oplook(p); /* could probably avoid this call */
pc += asmout(p, o, 0);
}
if(debug['a'])
Bprint(&bso, "\n");
Bflush(&bso);
cflush();
etext = textsize;
for(t = pc; t < etext; t += sizeof(buf)-100) {
if(etext-t > sizeof(buf)-100)
datblk(t, sizeof(buf)-100, 1);
else
datblk(t, etext-t, 1);
}
Bflush(&bso);
cflush();
curtext = P;
switch(HEADTYPE) {
case 0:
case 4:
OFFSET = rnd(HEADR+textsize, 4096);
seek(cout, OFFSET, 0);
break;
case 1:
case 2:
case 3:
case 5:
OFFSET = HEADR+textsize;
seek(cout, OFFSET, 0);
break;
case 6: /* headerless, padded segments */
OFFSET = rnd(HEADR+textsize, INITRND);
seek(cout, OFFSET, 0);
break;
}
for(t = 0; t < datsize; t += sizeof(buf)-100) {
if(datsize-t > sizeof(buf)-100)
datblk(t, sizeof(buf)-100, 0);
else
datblk(t, datsize-t, 0);
}
symsize = 0;
lcsize = 0;
if(!debug['s']) {
if(debug['v'])
Bprint(&bso, "%5.2f sym\n", cputime());
Bflush(&bso);
switch(HEADTYPE) {
case 0:
case 4:
OFFSET = rnd(HEADR+textsize, 4096)+datsize;
seek(cout, OFFSET, 0);
break;
case 3:
case 2:
case 1:
case 5:
OFFSET = HEADR+textsize+datsize;
seek(cout, OFFSET, 0);
break;
case 6: /* headerless, padded segments */
OFFSET += rnd(datsize, INITRND);
seek(cout, OFFSET, 0);
break;
}
if(!debug['s'])
asmsym();
if(debug['v'])
Bprint(&bso, "%5.2f pc\n", cputime());
Bflush(&bso);
if(!debug['s'])
asmlc();
cflush();
}
if(debug['v'])
Bprint(&bso, "%5.2f header\n", cputime());
Bflush(&bso);
OFFSET = 0;
seek(cout, OFFSET, 0);
switch(HEADTYPE) {
case 1:
break;
case 2:
t = thechar == 'j'? B_MAGIC: Y_MAGIC;
lput(t);
lput(textsize); /* sizes */
lput(datsize);
lput(bsssize);
lput(symsize); /* nsyms */
lput(entryvalue()); /* va of entry */
lput(0L);
lput(lcsize);
if (t & HDR_MAGIC)
llput(entryvalue()); /* va of entry */
break;
}
cflush();
}
void
strnput(char *s, int n)
{
for(; *s; s++){
cput(*s);
n--;
}
for(; n > 0; n--)
cput(0);
}
void
cput(int c)
{
cbp[0] = c;
cbp++;
cbc--;
if(cbc <= 0)
cflush();
}
void
wput(long l)
{
cbp[0] = l>>8;
cbp[1] = l;
cbp += 2;
cbc -= 2;
if(cbc <= 0)
cflush();
}
void
wputl(long l)
{
cbp[0] = l;
cbp[1] = l>>8;
cbp += 2;
cbc -= 2;
if(cbc <= 0)
cflush();
}
void
lput(long l)
{
cbp[0] = l>>24;
cbp[1] = l>>16;
cbp[2] = l>>8;
cbp[3] = l;
cbp += 4;
cbc -= 4;
if(cbc <= 0)
cflush();
}
void
lputl(long l)
{
cbp[3] = l>>24;
cbp[2] = l>>16;
cbp[1] = l>>8;
cbp[0] = l;
cbp += 4;
cbc -= 4;
if(cbc <= 0)
cflush();
}
void
llput(vlong v)
{
lput(v>>32);
lput(v);
}
void
llputl(vlong v)
{
lputl(v);
lputl(v>>32);
}
void
cflush(void)
{
int n;
n = sizeof(buf.cbuf) - cbc;
if(n)
write(cout, buf.cbuf, n);
cbp = buf.cbuf;
cbc = sizeof(buf.cbuf);
}
void
nopstat(char *f, Count *c)
{
if(c->outof)
Bprint(&bso, "%s delay %ld/%ld (%.2f)\n", f,
c->outof - c->count, c->outof,
(double)(c->outof - c->count)/c->outof);
}
void
asmsym(void)
{
Prog *p;
Auto *a;
Sym *s;
int h;
s = lookup("etext", 0);
if(s->type == STEXT)
putsymb(s->name, 'T', s->value+INITTEXT, s->version);
for(h=0; h<NHASH; h++)
for(s=hash[h]; s!=S; s=s->link)
switch(s->type) {
case SCONST:
putsymb(s->name, 'D', s->value, s->version);
continue;
case SSTRING:
putsymb(s->name, 'T', s->value, s->version);
continue;
case SDATA:
putsymb(s->name, 'D', s->value+INITDAT, s->version);
continue;
case SBSS:
putsymb(s->name, 'B', s->value+INITDAT, s->version);
continue;
case SFILE:
putsymb(s->name, 'f', s->value, s->version);
continue;
}
for(p=textp; p!=P; p=p->cond) {
s = p->from.sym;
if(s->type != STEXT && s->type != SLEAF)
continue;
/* filenames first */
for(a=p->to.autom; a; a=a->link)
if(a->type == D_FILE)
putsymb(a->asym->name, 'z', a->aoffset, 0);
else
if(a->type == D_FILE1)
putsymb(a->asym->name, 'Z', a->aoffset, 0);
if(s->type == STEXT)
putsymb(s->name, 'T', s->value+INITTEXT, s->version);
else
putsymb(s->name, 'L', s->value+INITTEXT, s->version);
/* frame, auto and param after */
putsymb(".frame", 'm', p->to.offset+ptrsize, 0);
for(a=p->to.autom; a; a=a->link)
if(a->type == D_AUTO)
putsymb(a->asym->name, 'a', -a->aoffset, 0);
else
if(a->type == D_PARAM)
putsymb(a->asym->name, 'p', a->aoffset, 0);
}
if(debug['v'] || debug['n'])
Bprint(&bso, "symsize = %lud\n", symsize);
Bflush(&bso);
}
void
putsymb(char *s, int t, vlong v, int ver)
{
int i, f, l;
if(t == 'f')
s++;
if(thechar == 'j'){
l = 8;
llput(v);
}else{
l = 4;
lput(v);
}
if(ver)
t += 'a' - 'A';
cput(t+0x80); /* 0x80 is variable length */
if(t == 'Z' || t == 'z') {
cput(s[0]);
for(i=1; s[i] != 0 || s[i+1] != 0; i += 2) {
cput(s[i]);
cput(s[i+1]);
}
cput(0);
cput(0);
i++;
}
else {
for(i=0; s[i]; i++)
cput(s[i]);
cput(0);
}
symsize += l + 1 + i + 1;
if(debug['n']) {
if(t == 'z' || t == 'Z') {
Bprint(&bso, "%c %.8llux ", t, v);
for(i=1; s[i] != 0 || s[i+1] != 0; i+=2) {
f = ((s[i]&0xff) << 8) | (s[i+1]&0xff);
Bprint(&bso, "/%x", f);
}
Bprint(&bso, "\n");
return;
}
if(ver)
Bprint(&bso, "%c %.8llux %s<%d>\n", t, v, s, ver);
else
Bprint(&bso, "%c %.8llux %s\n", t, v, s);
}
}
#define MINLC 2
void
asmlc(void)
{
long oldpc, oldlc;
Prog *p;
long v, s;
oldpc = 0;
oldlc = 0;
for(p = firstp; p != P; p = p->link) {
if(p->line == oldlc || p->as == ATEXT || p->as == ANOP) {
if(p->as == ATEXT)
curtext = p;
if(debug['L'])
Bprint(&bso, "%6lux %P\n",
p->pc, p);
continue;
}
if(debug['L'])
Bprint(&bso, "\t\t%6ld", lcsize);
v = (p->pc - oldpc) / MINLC;
while(v) {
s = 127;
if(v < 127)
s = v;
cput(s+128); /* 129-255 +pc */
if(debug['L'])
Bprint(&bso, " pc+%ld*%d(%ld)", s, MINLC, s+128);
v -= s;
lcsize++;
}
s = p->line - oldlc;
oldlc = p->line;
oldpc = p->pc + MINLC;
if(s > 64 || s < -64) {
cput(0); /* 0 vv +lc */
cput(s>>24);
cput(s>>16);
cput(s>>8);
cput(s);
if(debug['L']) {
if(s > 0)
Bprint(&bso, " lc+%ld(%d,%ld)\n",
s, 0, s);
else
Bprint(&bso, " lc%ld(%d,%ld)\n",
s, 0, s);
Bprint(&bso, "%6lux %P\n",
p->pc, p);
}
lcsize += 5;
continue;
}
if(s > 0) {
cput(0+s); /* 1-64 +lc */
if(debug['L']) {
Bprint(&bso, " lc+%ld(%ld)\n", s, 0+s);
Bprint(&bso, "%6lux %P\n",
p->pc, p);
}
} else {
cput(64-s); /* 65-128 -lc */
if(debug['L']) {
Bprint(&bso, " lc%ld(%ld)\n", s, 64-s);
Bprint(&bso, "%6lux %P\n",
p->pc, p);
}
}
lcsize++;
}
while(lcsize & 1) {
s = 129;
cput(s);
lcsize++;
}
if(debug['v'] || debug['L'])
Bprint(&bso, "lcsize = %ld\n", lcsize);
Bflush(&bso);
}
void
datblk(long s, long n, int str)
{
Prog *p;
char *cast;
vlong d;
long l, fl, j;
int i, c;
memset(buf.dbuf, 0, n+100);
for(p = datap; p != P; p = p->link) {
curp = p;
if(str != (p->from.sym->type == SSTRING))
continue;
l = p->from.sym->value + p->from.offset - s;
c = p->reg;
i = 0;
if(l < 0) {
if(l+c <= 0)
continue;
while(l < 0) {
l++;
i++;
}
}
if(l >= n)
continue;
if(p->as != AINIT && p->as != ADYNT) {
for(j=l+(c-i)-1; j>=l; j--)
if(buf.dbuf[j]) {
print("%P\n", p);
diag("multiple initialization");
break;
}
}
switch(p->to.type) {
default:
diag("unknown mode in initialization\n%P", p);
break;
case D_FCONST:
switch(c) {
default:
case 4:
fl = ieeedtof(p->to.ieee);
cast = (char*)&fl;
for(; i<c; i++) {
buf.dbuf[l] = cast[fnuxi8[i]];
l++;
}
break;
case 8:
cast = (char*)p->to.ieee;
for(; i<c; i++) {
buf.dbuf[l] = cast[fnuxi8[i]];
l++;
}
break;
}
break;
case D_SCONST:
for(; i<c; i++) {
buf.dbuf[l] = p->to.sval[i];
l++;
}
break;
case D_VCONST:
d = *p->to.vval;
goto dconst;
case D_CONST:
d = p->to.offset;
dconst:
if(p->to.sym) {
switch(p->to.sym->type) {
case STEXT:
case SLEAF:
case SSTRING:
d += (p->to.sym->value + INITTEXT);
break;
case SDATA:
case SBSS:
d += (p->to.sym->value + INITDAT);
break;
}
}
cast = (char*)&d;
switch(c) {
default:
diag("bad nuxi %d %d\n%P", c, i, curp);
break;
case 1:
for(; i<c; i++) {
buf.dbuf[l] = cast[inuxi1[i]];
l++;
}
break;
case 2:
for(; i<c; i++) {
buf.dbuf[l] = cast[inuxi2[i]];
l++;
}
break;
case 4:
for(; i<c; i++) {
buf.dbuf[l] = cast[inuxi4[i]];
l++;
}
break;
case 8:
for(; i<c; i++) {
buf.dbuf[l] = cast[inuxi8[i]];
l++;
}
break;
}
break;
}
if(debug['d'] && i == c) {
Bprint(&bso, "%.8llux", l+s+INITDAT-c);
for(j = -c; j<0; j++)
Bprint(&bso, " %.2ux", ((uchar*)buf.dbuf)[l + j]);
Bprint(&bso, "\t%P\n", curp);
}
}
write(cout, buf.dbuf, n);
}
#define R(r) ((r)&0x1F)
#define OPX (0x3 | o->op<<2)
#define OPF (OPX | o->func3<<12)
#define OP_R(rs1,rs2,rd)\
(OPF | rd<<7 | R(rs1)<<15 | R(rs2)<<20 | o->param<<25)
#define OP_RF(rs1,rs2,rd,rm)\
(OPX | rm<<12 | rd<<7 | R(rs1)<<15 | R(rs2)<<20 | o->param<<25)
#define OP_RO(rs1,rs2,rd)\
(0x3 | OOP<<2 | o->func3<<12 | rd<<7 | R(rs1)<<15 | R(rs2)<<20)
#define OP_ADD(rs1,rs2,rd)\
(0x3 | OOP<<2 | rd<<7 | R(rs1)<<15 | R(rs2)<<20)
#define OP_I(rs1,rd,imm)\
(OPF | rd<<7 | R(rs1)<<15 | (imm)<<20)
#define OP_FI(func3,rs1,rd,imm)\
(OPX | func3<<12 | rd<<7 | R(rs1)<<15 | (imm)<<20)
#define OP_S(rs1,rs2,imm)\
(OPF | (imm&0x1F)<<7 | R(rs1)<<15 | R(rs2)<<20 | (imm>>5)<<25)
#define OP_B(rs1,rs2,imm)\
(OPF | R(rs1)<<15 | R(rs2)<<20 | (imm&0x800)>>4 | (imm&0x1E)<<7 | \
(imm&0x7E0)<<20 | (imm&0x1000)<<19)
#define OP_U(rd,imm)\
(0x3 | OLUI<<2 | rd<<7 | (imm&0xFFFFF000))
#define OP_UP(rd,imm)\
(0x3 | OAUIPC<<2 | rd<<7 | (imm&0xFFFFF000))
#define OP_J(rd,imm)\
(OPX | rd<<7 | (imm&0xff000) | (imm&0x800)<<9 | (imm&0x7FE)<<20 | (imm&0x100000)<<11)
/*
* aflag: 0 - assemble to object file
* 1 - return assembled instruction
* 2 - first pass, return length of assembled instruction
* 3 - later pass, return length of assembled instruction
*/
int
asmout(Prog *p, Optab *o, int aflag)
{
vlong vv;
long o1, o2, o3, v;
int r;
o1 = 0;
o2 = 0;
o3 = 0;
r = p->reg;
if(r == NREG) switch(p->as){
case AMOVF:
case AMOVD:
if(p->from.type == D_FREG && p->to.type == D_FREG)
r = p->from.reg;
break;
case AMOV:
case AJMP:
r = REGZERO;
break;
case AJAL:
r = REGLINK;
break;
default:
r = p->to.reg;
break;
}
if(!debug['c'] && o->ctype){
o1 = asmcompressed(p, o, r, aflag == 2);
if(o1 != 0){
switch(aflag){
case 1:
return o1;
case 2:
case 3:
return 2;
}
if(debug['a']){
v = p->pc + INITTEXT;
Bprint(&bso, " %.8lux: %.4lux \t%P\n", v, o1, p);
}
wputl(o1);
return 2;
}
}
if(aflag >= 2)
return o->size;
switch(o->type) {
default:
diag("unknown type %d", o->type);
if(!debug['a'])
prasm(p);
break;
case 0: /* add S,[R,]D */
o1 = OP_R(r, p->from.reg, p->to.reg);
break;
case 1: /* slli $I,[R,]D */
v = p->from.offset & 0x3F;
if(thechar != 'j')
v &= 0x1F;
v |= (o->param<<5);
o1 = OP_I(r, p->to.reg, v);
break;
case 2: /* addi $I,[R,]D */
v = p->from.offset;
if(v < -BIG || v >= BIG)
diag("imm out of range\n%P", p);
o1 = OP_I(r, p->to.reg, v);
break;
case 3: /* beq S,[R,]L */
if(r == NREG)
r = REGZERO;
if(p->cond == P)
v = 0;
else
v = (p->cond->pc - pc);
if(v < -0x1000 || v >= 0x1000)
diag("branch out of range\n%P", p);
o1 = OP_B(r, p->from.reg, v);
break;
case 4: /* jal [D,]L */
if(p->cond == P)
v = 0;
else
v = (p->cond->pc - pc);
if(v < -0x100000 || v >= 0x100000)
diag("jump out of range\n%P", p);
o1 = OP_J(r, v);
break;
case 5: /* jalr [D,]I(S) */
v = regoff(&p->to);
if(v < -BIG || v >= BIG)
diag("imm out of range\n%P", p);
o1 = OP_I(classreg(&p->to), r, v);
break;
case 6: /* sb R,I(S) */
v = regoff(&p->to);
r = classreg(&p->to);
if(v < -BIG || v >= BIG)
diag("imm out of range\n%P", p);
o1 = OP_S(r, p->from.reg, v);
break;
case 7: /* lb I(S),D */
v = regoff(&p->from);
r = classreg(&p->from);
if(v < -BIG || v >= BIG)
diag("imm out of range\n%P", p);
o1 = OP_I(r, p->to.reg, v);
break;
case 8: /* lui I,D */
v = p->from.offset;
o1 = OP_U(p->to.reg, v);
break;
case 9: /* lui I1,D; addi I0,D */
v = regoff(&p->from);
if(thechar == 'j' && v >= 0x7ffff800){
/* awkward edge case */
o1 = OP_U(p->to.reg, -v);
v &= 0xFFF;
o2 = OP_FI(4, p->to.reg, p->to.reg, v); /* xori */
break;
}
if(v & 0x800)
v += 0x1000;
o1 = OP_U(p->to.reg, v);
v &= 0xFFF;
o2 = OP_I(p->to.reg, p->to.reg, v);
break;
case 10: /* sign extend */
if(p->as == AMOVBU) {
o1 = OP_I(p->from.reg, p->to.reg, o->param);
break;
}
v = o->param;
if(thechar == 'j')
v += 32;
o1 = OP_FI(1, p->from.reg, p->to.reg, v & 0x3F); /* slli */
o2 = OP_I(p->to.reg, p->to.reg, v); /* srli or srai */
break;
case 11: /* addi $I,R,D */
v = regoff(&p->from);
if(v < -BIG || v >= BIG)
diag("imm out of range\n%P", p);
o1 = OP_I(classreg(&p->from), p->to.reg, v);
break;
case 12: /* mov r,lext => lui/auipc I1,T; sb r,I0(T) */
v = regoff(&p->to);
if(thechar == 'j'){
vv = v + INITDAT + BIG - INITTEXT - pc;
v = (long)vv;
if(v != vv || (v&~0x7FF) == 0x7FFFF800)
diag("address out of range\n%P", p);
}else
v += INITDAT + BIG;
if(v & 0x800)
v += 0x1000;
o1 = thechar == 'j' ? OP_UP(REGTMP, v) : OP_U(REGTMP, v);
v &= 0xFFF;
o2 = OP_S(REGTMP, p->from.reg, v);
break;
case 13: /* mov lext, r => lui/auipc I1,T; lb r,I0(T) */
v = regoff(&p->from);
if(thechar == 'j'){
vv = v + INITDAT + BIG - INITTEXT - pc;
v = (long)vv;
if(v != vv || (v&~0x7FF) == 0x7FFFF800)
diag("address out of range\n%P", p);
}else
v += INITDAT + BIG;
if(v & 0x800)
v += 0x1000;
o1 = thechar == 'j' ? OP_UP(REGTMP, v) : OP_U(REGTMP, v);
v &= 0xFFF;
o2 = OP_I(REGTMP, p->to.reg, v);
break;
case 14: /* op $lcon,[r,]d => lui L1,T; addi $L0,T,T; op T,r,d */
v = regoff(&p->from);
if(p->as == AMOVW || p->as == AMOV)
r = classreg(&p->from);
if(thechar == 'j' && v >= 0x7ffff800){
/* awkward edge case */
o1 = OP_U(p->to.reg, -v);
v &= 0xFFF;
o2 = OP_FI(4, p->to.reg, p->to.reg, v); /* xori */
}else{
if(v & 0x800)
v += 0x1000;
o1 = OP_U(REGTMP, v);
v &= 0xFFF;
o2 = OP_FI(0, REGTMP, REGTMP, v); /* addi */
}
o3 = OP_RO(r, REGTMP, p->to.reg);
break;
case 15: /* mov r,L(s) => lui L1,T; add s,T,T; sb r,L0(T) */
v = regoff(&p->to);
r = classreg(&p->to);
if(v & 0x800)
v += 0x1000;
o1 = OP_U(REGTMP, v);
v &= 0xFFF;
o2 = OP_ADD(r, REGTMP, REGTMP);
o3 = OP_S(REGTMP, p->from.reg, v);
break;
case 16: /* mov L(s),r => lui L1,T; add s,T,T; lb r,L0(T) */
v = regoff(&p->from);
r = classreg(&p->from);
if(v & 0x800)
v += 0x1000;
o1 = OP_U(REGTMP, v);
v &= 0xFFF;
o2 = OP_ADD(r, REGTMP, REGTMP);
o3 = OP_I(REGTMP, p->to.reg, v);
break;
case 17: /* fcvt S,D */
v = 7; /* dynamic rounding mode */
if(o->a3 == C_REG) /* convert to int? */
v = 1; /* round towards zero */
o1 = OP_RF(p->from.reg, o->func3, p->to.reg, v);
break;
case 18: /* lui/auipc L1, T; jal [r,]L0(T) */
/* p->cond->pc == p->pc here; pc is current instruction */
if(p->cond == P)
v = 0;
else
v = p->cond->pc - (pc + INITTEXT);
if(thechar == 'j'){
vv = v + INITTEXT;
v = (long)vv;
if(v != vv || (v&~0x7FF) == 0x7FFFF800)
diag("branch out of range\n%P", p);
}else
v += INITTEXT;
/* if low immediate offset looks negative, skip to next page */
if(v & 0x800)
v += 0x1000;
o1 = thechar == 'j' ? OP_UP(REGTMP, v) : OP_U(REGTMP, v);
v &= 0xFFF;
o2 = OP_I(REGTMP, r, v);
break;
case 19: /* addiw $0, rs, rd */
v = 0;
o1 = OP_I(p->from.reg, p->to.reg, v);
break;
case 20: /* lui/auipc I1,D; addi I0; D */
if(thechar == 'j'){
vv = regoff(&p->from) + instoffx - (pc + INITTEXT);
v = (long)vv;
if(v != vv || (v&~0x7FF) == 0x7FFFF800)
diag("address %llux out of range\n%P",
regoff(&p->from) + instoffx, p);
}else{
v = regoff(&p->from) + instoffx;
}
if(v & 0x800)
v += 0x1000;
o1 = thechar == 'j' ? OP_UP(p->to.reg, v) : OP_U(p->to.reg, v);
v &= 0xFFF;
o2 = OP_I(p->to.reg, p->to.reg, v);
break;
case 21: /* lui I,D; s[lr]ai N,D */
vv = *p->from.vval;
v = vconshift(vv);
if(v < 0)
diag("64 bit constant error:\n%P", p);
if(v < 12)
vv <<= 12 - v;
else
vv >>= v - 12;
o1 = OP_U(p->to.reg, (long)vv);
if (v > 12)
o2 = OP_FI(1, p->to.reg, p->to.reg, v - 12); /* slli */
else
o2 = OP_I(p->to.reg, p->to.reg, 12 - v); /* srai */
break;
case 22: /* CSRRx C, rs, rd */
v = p->from.offset & 0xFFF;
o1 = OP_I(p->reg, p->to.reg, v);
break;
case 24: /* SYS */
v = p->to.offset & 0xFFF;
o1 = OP_I(0, 0, v);
break;
case 25: /* word $x */
o1 = regoff(&p->to);
break;
case 26: /* pseudo ops */
break;
}
if(aflag)
return o1;
v = p->pc + INITTEXT;
switch(o->size) {
default:
if(debug['a'])
Bprint(&bso, " %.8lux:\t\t%P\n", v, p);
break;
case 4:
if(debug['a'])
Bprint(&bso, " %.8lux: %.8lux\t%P\n", v, o1, p);
lputl(o1);
break;
case 8:
if(debug['a'])
Bprint(&bso, " %.8lux: %.8lux %.8lux%P\n", v, o1, o2, p);
lputl(o1);
lputl(o2);
break;
case 12:
if(debug['a'])
Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux%P\n", v, o1, o2, o3, p);
lputl(o1);
lputl(o2);
lputl(o3);
break;
}
return o->size;
}