ref: 44ce0097b612a1fefd754065bdf8d9d2e5ef60c8
dir: /libinterp/comp-power.c/
#include "lib9.h"
#include "isa.h"
#include "interp.h"
#include "raise.h"
/*
* Copyright © 1997 C H Forsyth (forsyth@terzarima.net)
*/
#define ROMABLE 0 /* costs something to zero patch vectors */
#define RESCHED 1 /* check for interpreter reschedule */
#define PATCH(ptr) *ptr |= ((ulong)code-(ulong)ptr) & 0xfffc
#define T(r) *((void**)(R.r))
#define XO(o,xo) (((o)<<26)|((xo)<<1))
/* botch: ARRR, AIRR, LRRR, etc have dest first (will fix soon) */
#define OPARRR(o,d,a,b) ((o)|((d)<<21)|((a)<<16)|((b)<<11))
#define ARRR(o,d,a,b) gen((o)|((d)<<21)|((a)<<16)|((b)<<11))
#define AIRR(o,d,a,v) gen((o)|((d)<<21)|((a)<<16)|((v)&0xFFFF))
#define IRR(o,v,a,d) AIRR((o),(d),(a),(v))
#define RRR(o,b,a,d) ARRR((o),(d),(a),(b))
#define LRRR(o,a,s,b) ARRR((o),(s),(a),(b))
#define LIRR(o,a,s,v) AIRR((o),(s),(a),(v))
#define Bx(li,aa) gen((18<<26)|((li)&0x3FFFFFC)|((aa)<<1))
#define RLW(op,a,s,sh,mb,me) ((op)|(((s)&31L)<<21)|(((a)&31L)<<16)|(((sh)&31L)<<11)|\
(((mb)&31L)<<6)|(((me)&31L)<<1))
#define MFSPR(s, d) gen(XO(31,339) | ((d)<<21) | ((s)<<11))
#define MTSPR(s, d) gen(XO(31,467) | ((s)<<21) | ((d)<<11));
#define MFCR(d) gen(XO(31,19) | ((d)<<21))
#define MTCRF(s, mask) gen(XO(31,144) | ((s)<<21) | ((mask)<<12))
#define MTCR(s) MTCRF(s, 0xff)
#define SLWI(d,a,n) gen(slw((d),(a),(n),0))
#define LRET() gen(Oblr)
#define SETR0() if(macjit){ AIRR(Oaddi, Rzero, 0, 0); } /* set R0 to 0 */
/* assumes H can be formed from signed halfword */
#define CMPH(r) AIRR(Ocmpi, Rcrf0, (r), (ulong)H);
#define NOTNIL(r) (CMPH((r)), CCALL(EQ, bounds))
enum
{
Rzero = 0, /* zero by design, not definition (P9/Inferno) */
Rsp = 1,
Rsb = 2,
Rarg = 3,
Ro1 = 8,
Ro2 = 9,
Ro3 = 10,
Ri = 11,
Rj = 12,
Rmp = 13,
Rfp = 14,
Rreg = 15,
Rta = 16, /* unused */
Rpic = 17, /* address for computed goto, for move to CTR or LR */
Rcon = 26, /* constant builder; temporary */
/* 27, 28, 29, 30 are potentially external registers (P9/Inferno) */
Rlink = 31, /* holds copies of LR; linker temp */
Rfret = 0,
Rf1 = 4,
Rf2 = 6,
Rfcvi = 27, /* floating conversion constant (P9/Inferno) */
Rfzero = 28, /* 0.0 (P9/Inferno) */
Rfhalf = 29, /* 0.5 (P9/Inferno) */
Rlr = 8<<5, /* SPR(LR) */
Rctr = 9<<5, /* SPR(CTR) */
Rcrf0 = 0, /* condition code field 0 */
Rcrf1 = 1<<2, /* condition code field 1 */
Rcrbrel = 31, /* condition code bit set to force relinquish */
Olwz = XO(32, 0),
Olwzu = XO(33, 0),
Olwzx = XO(31, 23),
Olbz = XO(34, 0),
Olbzu = XO(35, 0),
Olbzx = XO(31, 87),
Olfd = XO(50, 0),
Olhz = XO(40, 0),
Olhzx = XO(31, 279),
Ostw = XO(36, 0),
Ostwu = XO(37, 0),
Ostwx = XO(31, 151),
Ostb = XO(38, 0),
Ostbu = XO(39, 0),
Ostbx = XO(31, 215),
Osth = XO(44,0),
Osthx = XO(31, 407),
Ostfd = XO(54, 0),
Ostfdu = XO(55, 0),
Oaddc = XO(31,10),
Oadde = XO(31, 138),
Oaddi = XO(14, 0), /* simm */
Oaddic_ = XO(13, 0),
Oaddis = XO(15, 0),
Ocrxor = XO(19, 193),
Ofadd = XO(63, 21),
Ofcmpo = XO(63, 32),
Ofctiwz = XO(63, 15),
Ofsub = XO(63, 20),
Ofmr = XO(63, 72),
Ofmul = XO(63, 25),
Ofdiv = XO(63, 18),
Ofneg = XO(63, 40),
Oori = XO(24,0), /* uimm */
Ooris = XO(25,0), /* uimm */
Odivw = XO(31, 491),
Odivwu = XO(31, 459),
Omulhw = XO(31, 75),
Omulhwu = XO(31, 11),
Omulli = XO(7, 0),
Omullw = XO(31, 235),
Osubf = XO(31, 40),
Osubfc = XO(31,8),
Osubfe = XO(31,136),
Osubfic = XO(8, 0),
Oadd = XO(31, 266),
Oand = XO(31, 28),
Oneg = XO(31, 104),
Oor = XO(31, 444),
Oxor = XO(31, 316),
Ocmpi = XO(11, 0),
Ocmp = XO(31, 0),
Ocmpl = XO(31, 32),
Ocmpli = XO(10,0),
Orlwinm = XO(21, 0),
Oslw = XO(31, 24),
Osraw = XO(31,792),
Osrawi = XO(31,824),
Osrw = XO(31,536),
Cnone = OPARRR(0,20,0,0), /* unconditional */
Ceq = OPARRR(0,12,2,0),
Cle = OPARRR(0,4,1,0),
Clt = OPARRR(0,12,0,0),
Cdnz = OPARRR(0,16,0,0),
Cgt = OPARRR(0,12,1,0),
Cne = OPARRR(0,4,2,0),
Cge = OPARRR(0,4,0,0),
Cle1 = OPARRR(0,4,5,0), /* Cle on CR1 */
Crelq = OPARRR(0,12,Rcrbrel,0), /* relinquish */
Cnrelq = OPARRR(0,4,Rcrbrel,0), /* not relinquish */
Cpredict = OPARRR(0,1,0,0), /* reverse prediction */
Lk = 1,
Aa = 2,
Obeq = OPARRR(16<<26,12,2,0),
Obge = OPARRR(16<<26,4,0,0),
Obgt = OPARRR(16<<26,12,1,0),
Oble = OPARRR(16<<26,4,1,0),
Oblt = OPARRR(16<<26,12,0,0),
Obne = OPARRR(16<<26,4,2,0),
Ob = XO(18, 0),
Obc = XO(16, 0),
Obcctr = XO(19,528),
Obcctrl = Obcctr | Lk,
Obctr = Obcctr | Cnone,
Obctrl = Obctr | Lk,
Obclr = XO(19, 16),
Oblr = Obclr | Cnone,
Oblrl = Oblr | Lk,
Olea = 100, // pseudo op
SRCOP = (1<<0),
DSTOP = (1<<1),
WRTPC = (1<<2), /* update R.PC */
TCHECK = (1<<3), /* check R.t for continue/ret */
NEWPC = (1<<4), /* goto R.PC */
DBRAN = (1<<5), /* dest is branch */
THREOP = (1<<6),
Lg2Rune = sizeof(Rune)==4? 2: 1,
ANDAND = 1,
OROR,
EQAND,
MacRET = 0,
MacFRP,
MacCASE,
MacFRAM,
MacCOLR,
MacMCAL,
MacMFRA,
MacCVTFW,
MacRELQ,
MacEND,
NMACRO
};
void (*comvec)(void);
int macjit;
extern long das(ulong*);
static ulong* code;
static ulong* base;
static ulong* patch;
static int pass;
static Module* mod;
static ulong* tinit;
static ulong* litpool;
static int nlit;
static ulong macro[NMACRO];
static void ldbigc(long, int);
static void rdestroy(void);
static void macret(void);
static void macfrp(void);
static void maccase(void);
static void maccvtfw(void);
static void macfram(void);
static void maccolr(void);
static void macend(void);
static void macmcal(void);
static void macmfra(void);
static void macrelq(void);
static void movmem(Inst*);
struct
{
int o;
void (*f)(void);
} macinit[] =
{
MacFRP, macfrp, /* decrement and free pointer */
MacRET, macret, /* return instruction */
MacCASE, maccase, /* case instruction */
MacCOLR, maccolr, /* increment and color pointer */
MacFRAM, macfram, /* frame instruction */
MacMCAL, macmcal, /* mcall bottom half */
MacMFRA, macmfra, /* punt mframe because t->initialize==0 */
MacCVTFW, maccvtfw,
MacRELQ, macrelq, /* reschedule */
MacEND, macend,
0
};
static void
rdestroy(void)
{
destroy(R.s);
}
static void
rmcall(void)
{
Frame *f;
Prog *p;
if((void*)R.dt == H)
error(exModule);
f = (Frame*)R.FP;
if(f == H)
error(exModule);
f->mr = nil;
((void(*)(Frame*))R.dt)(f);
R.SP = (uchar*)f;
R.FP = f->fp;
if(f->t == nil)
unextend(f);
else
freeptrs(f, f->t);
p = currun();
if(p->kill != nil)
error(p->kill);
}
static void
rmfram(void)
{
Type *t;
Frame *f;
uchar *nsp;
t = (Type*)R.s;
if(t == H)
error(exModule);
nsp = R.SP + t->size;
if(nsp >= R.TS) {
R.s = t;
extend();
T(d) = R.s;
return;
}
f = (Frame*)R.SP;
R.SP = nsp;
f->t = t;
f->mr = nil;
initmem(t, f);
T(d) = f;
}
void
urk(char *s)
{
print("compile failed: %s\n", s); // debugging
error(exCompile); // production
}
static void
gen(ulong o)
{
*code++ = o;
}
static void
br(ulong op, ulong disp)
{
*code++ = op | (disp & 0xfffc);
}
static void
mfspr(int d, int s)
{
MFSPR(s, d);
}
static void
mtspr(int d, int s)
{
MTSPR(s, d);
}
static ulong
slw(int d, int s, int v, int rshift)
{
int m0, m1;
if(v < 0 || v > 32)
urk("slw v");
if(v < 0)
v = 0;
else if(v > 32)
v = 32;
if(rshift) { /* shift right */
m0 = v;
m1 = 31;
v = 32-v;
} else {
m0 = 0;
m1 = 31-v;
}
return RLW(Orlwinm, d, s, v, m0, m1);
}
static void
jr(int reg)
{
mtspr(Rctr, reg); /* code would be faster if this were loaded well before branch */
gen(Obctr);
}
static void
jrl(int reg)
{
mtspr(Rctr, reg);
gen(Obctrl);
}
static void
jrc(int op, int reg)
{
mtspr(Rctr, reg);
gen(Obcctr | op);
}
static long
brdisp(ulong *dest)
{
ulong d, top;
d = (ulong)dest - (ulong)code;
if(!ROMABLE)
return d & 0x3fffffc;
top = d>>25;
if(top == 0 || top == 0x7F){
/* fits in 26-bit signed displacement */
return d & 0x3fffffc;
}
return -1;
}
static void
jmp(ulong *dest)
{
long d;
if((d = brdisp(dest)) < 0){
ldbigc((ulong)dest, Rpic); /* Rpic & Rctr must be free */
jr(Rpic);
} else
gen(Ob | d);
}
static void
jmpl(ulong *dest)
{
long d;
if((d = brdisp(dest)) < 0){
ldbigc((ulong)dest, Rpic); /* Rpic must be free */
jrl(Rpic);
} else
gen(Ob | d | Lk);
}
static void
jmpc(int op, ulong *dest)
{
ldbigc((ulong)dest, Rpic);
jrc(op, Rpic);
}
static int
bigc(long c)
{
if(c >= -0x8000 && c <= 0x7FFF)
return 0;
return 1;
}
static void
ldbigc(long c, int reg)
{
AIRR(Oaddis, reg,Rzero,c>>16);
LIRR(Oori, reg,reg,c);
}
static void
ldc(long c, int reg)
{
if(!bigc(c))
AIRR(Oaddi, reg, Rzero, c);
else if((ulong)c <= 0xFFFF)
LIRR(Oori, reg, Rzero, c);
else if((c&0xFFFF) == 0)
LIRR(Ooris, reg, Rzero, c>>16);
else {
AIRR(Oaddis, reg,Rzero,c>>16);
LIRR(Oori, reg,reg,c);
}
}
static void
mem(int inst, long disp, int rm, int r)
{
if(bigc(disp)) {
ldc(disp, Rcon);
switch(inst){
default: urk("mem op"); break;
case Olea: inst = Oadd; break;
case Olwz: inst = Olwzx; break;
case Olbz: inst = Olbzx; break;
case Olhz: inst = Olhzx; break;
case Ostw: inst = Ostwx; break;
case Ostb: inst = Ostbx; break;
case Osth: inst = Osthx; break;
}
ARRR(inst, r, Rcon, rm);
} else {
if(inst == Olea)
inst = Oaddi;
AIRR(inst, r, rm,disp);
}
}
static void
opx(int mode, Adr *a, int op, int reg)
{
ulong c;
int r, rx, lea;
lea = 0;
if(op == Olea){
lea = 1;
op = Oaddi;
}
switch(mode) {
case AFP:
c = a->ind;
if(bigc(c))
urk("bigc op1b 1");
AIRR(op, reg, Rfp,c);
break;
case AMP:
c = a->ind;
if(bigc(c))
urk("bigc op1b 2");
AIRR(op, reg, Rmp,c);
break;
case AIMM:
if(lea) {
if(a->imm != 0) {
ldc(a->imm, reg);
AIRR(Ostw, reg, Rreg,O(REG,st));
} else
AIRR(Ostw, Rzero, Rreg,O(REG,st));
AIRR(Oaddi, reg, Rreg,O(REG,st));
} else
ldc(a->imm, reg);
return;
case AIND|AFP:
r = Rfp;
goto offset;
case AIND|AMP:
r = Rmp;
offset:
c = a->i.s;
rx = Ri;
if(lea || op == Olwz)
rx = reg;
AIRR(Olwz, rx, r,a->i.f);
if(!lea || c != 0)
AIRR(op, reg, rx,c);
break;
}
}
static void
opwld(Inst *i, int op, int reg)
{
opx(USRC(i->add), &i->s, op, reg);
}
static void
opwst(Inst *i, int op, int reg)
{
opx(UDST(i->add), &i->d, op, reg);
}
static void
op2(Inst *i, int op, int reg)
{
int lea;
lea = 0;
if(op == Olea){
op = Oaddi;
lea = 1;
}
switch(i->add & ARM) {
case AXNON:
if(lea)
op = Olea;
opwst(i, op, reg);
return;
case AXIMM:
if(lea)
urk("op2/lea");
ldc((short)i->reg, reg);
return;
case AXINF:
IRR(op, i->reg,Rfp, reg);
break;
case AXINM:
IRR(op, i->reg,Rmp, reg);
break;
}
}
static void
op12(Inst *i, int b1flag, int b2flag)
{
int o1, o2;
o1 = Olwz;
if(b1flag)
o1 = Olbz;
o2 = Olwz;
if(b2flag)
o2 = Olbz;
if((i->add & ARM) == AXIMM) {
opwld(i, o1, Ro1);
op2(i, o2, Ro2);
} else {
op2(i, o2, Ro2);
opwld(i, o1, Ro1);
}
}
static void
op13(Inst *i, int o1, int o2)
{
opwld(i, o1, Ro1);
opwst(i, o2, Ro1);
}
static ulong
branch(Inst *i)
{
ulong rel;
if(base == 0)
return 0;
rel = (ulong)(base+patch[i->d.ins - mod->prog]);
rel -= (ulong)code;
if(rel & 3 || (long)rel <= -(1<<16) || (long)rel >= 1<<16)
urk("branch off");
return rel & 0xfffc;
}
static void
schedcheck(Inst *i)
{
ulong *cp;
if(i != nil && i->d.ins != nil && i->d.ins > i)
return; /* only backwards jumps can loop: needn't check forward ones */
cp = code;
gen(Obc | Cnrelq | Cpredict);
jmpl(base+macro[MacRELQ]);
PATCH(cp);
}
static void
literal(ulong imm, int roff)
{
nlit++;
ldbigc((ulong)litpool, Ro1);
IRR(Ostw, roff, Rreg, Ro1);
if(pass == 0)
return;
*litpool = imm;
litpool++;
}
static void
bounds(void)
{
/* mem(Ostw, O(REG,FP), Rreg, Rfp); */
error(exBounds);
}
static void
punt(Inst *i, int m, void (*fn)(void))
{
ulong pc;
if(m & SRCOP) {
if(UXSRC(i->add) == SRC(AIMM))
literal(i->s.imm, O(REG, s));
else {
opwld(i, Olea, Ro1);
mem(Ostw, O(REG, s), Rreg, Ro1);
}
}
if(m & DSTOP) {
opwst(i, Olea, Ro3);
IRR(Ostw, O(REG,d),Rreg, Ro3);
}
if(m & WRTPC) {
pc = patch[i-mod->prog+1];
ldbigc((ulong)(base+pc), Ro1);
IRR(Ostw, O(REG,PC),Rreg, Ro1);
}
if(m & DBRAN) {
pc = patch[i->d.ins-mod->prog];
literal((ulong)(base+pc), O(REG, d));
}
switch(i->add&ARM) {
case AXNON:
if(m & THREOP) {
IRR(Olwz, O(REG,d),Rreg, Ro2);
IRR(Ostw, O(REG,m),Rreg, Ro2);
}
break;
case AXIMM:
literal((short)i->reg, O(REG,m));
break;
case AXINF:
mem(Olea, i->reg, Rfp, Ro2);
mem(Ostw, O(REG, m), Rreg, Ro2);
break;
case AXINM:
mem(Olea, i->reg, Rmp, Ro2);
mem(Ostw, O(REG, m), Rreg, Ro2);
break;
}
IRR(Ostw, O(REG,FP),Rreg, Rfp);
jmpl((ulong*)fn);
ldc((ulong)&R, Rreg);
SETR0();
if(m & TCHECK) {
IRR(Olwz, O(REG,t),Rreg, Ro1);
IRR(Olwz, O(REG,xpc),Rreg, Ro2);
IRR(Ocmpi, 0, Ro1, Rcrf0);
mtspr(Rctr, Ro2);
gen(Obcctr | Cne);
}
IRR(Olwz, O(REG,FP),Rreg, Rfp);
IRR(Olwz, O(REG,MP),Rreg, Rmp);
if(m & NEWPC) {
IRR(Olwz, O(REG,PC),Rreg, Ro1);
jr(Ro1);
}
}
static void
comgoto(Inst *i)
{
WORD *t, *e;
opwld(i, Olwz, Ro2);
opwst(i, Olea, Ro3);
SLWI(Ro2, Ro2, 2);
ARRR(Olwzx, Ro1, Ro3,Ro2);
jr(Ro1);
if(pass == 0)
return;
t = (WORD*)(mod->origmp+i->d.ind);
e = t + t[-1];
t[-1] = 0;
while(t < e) {
t[0] = (ulong)(base + patch[t[0]]);
t++;
}
}
static void
comcase(Inst *i, int w)
{
int l;
WORD *t, *e;
if(w != 0) {
opwld(i, Olwz, Ro1); // v
opwst(i, Olea, Ro3); // table
jmp(base+macro[MacCASE]);
}
t = (WORD*)(mod->origmp+i->d.ind+4);
l = t[-1];
/* have to take care not to relocate the same table twice -
* the limbo compiler can duplicate a case instruction
* during its folding phase
*/
if(pass == 0) {
if(l >= 0)
t[-1] = -l-1; /* Mark it not done */
return;
}
if(l >= 0) /* Check pass 2 done */
return;
t[-1] = -l-1; /* Set real count */
e = t + t[-1]*3;
while(t < e) {
t[2] = (ulong)(base + patch[t[2]]);
t += 3;
}
t[0] = (ulong)(base + patch[t[0]]);
}
static void
comcasel(Inst *i)
{
int l;
WORD *t, *e;
t = (WORD*)(mod->origmp+i->d.ind+8);
l = t[-2];
if(pass == 0) {
if(l >= 0)
t[-2] = -l-1; /* Mark it not done */
return;
}
if(l >= 0) /* Check pass 2 done */
return;
t[-2] = -l-1; /* Set real count */
e = t + t[-2]*6;
while(t < e) {
t[4] = (ulong)base + patch[t[4]];
t += 6;
}
t[0] = (ulong)base + patch[t[0]];
}
static void
commframe(Inst *i)
{
ulong *cp1, *cp2;
opwld(i, Olwz, Ri); // must use Ri for MacFRAM
CMPH(Ri);
cp1 = code;
br(Obeq, 0);
if((i->add&ARM) == AXIMM) {
mem(Olwz, OA(Modlink, links)+i->reg*sizeof(Modl)+O(Modl, frame), Ri, Ri);
} else {
op2(i, Olwz, Ro2);
SLWI(Ro2, Ro2, 3); // assumes sizeof(Modl) == 8
ARRR(Oadd, Ri, Ro2, Ro2);
mem(Olwz, OA(Modlink, links)+O(Modl, frame), Ri, Ri);
}
AIRR(Olwz, Ro2, Ri,O(Type,initialize));
AIRR(Ocmpi, Rcrf0, Ro2, 0);
cp2 = code;
br(Obne, 0);
opwst(i, Olea, Rj);
PATCH(cp1);
ldbigc((ulong)(base+patch[i-mod->prog+1]), Rpic);
mtspr(Rlr, Rpic);
jmp(base+macro[MacMFRA]);
PATCH(cp2);
jmpl(base+macro[MacFRAM]);
opwst(i, Ostw, Ro1);
}
static void
commcall(Inst *i)
{
opwld(i, Olwz, Ro1); // f in Ro1
AIRR(Olwz, Ro3, Rreg,O(REG,M));
AIRR(Ostw, Rfp, Ro1,O(Frame,fp)); // f->fp = R.FP
AIRR(Ostw, Ro3, Ro1,O(Frame,mr)); // f->mr = R.M
opwst(i, Olwz, Ri);
if((i->add&ARM) == AXIMM) {
mem(Olwz, OA(Modlink, links)+i->reg*sizeof(Modl)+O(Modl, u.pc), Ri, Rj); // ml->entry in Rj
} else {
op2(i, Olwz, Rj);
SLWI(Rj, Rj, 3); // assumes sizeof(Modl) == 8
ARRR(Oadd, Ri, Rj, Rj);
mem(Olwz, OA(Modlink, links)+O(Modl, u.pc), Rj, Rj);
}
jmpl(base+macro[MacMCAL]);
}
static int
swapbraop(int b)
{
switch(b) {
case Obge:
return Oble;
case Oble:
return Obge;
case Obgt:
return Oblt;
case Oblt:
return Obgt;
}
return b;
}
static void
cbra(Inst *i, int op)
{
if(RESCHED)
schedcheck(i);
if(UXSRC(i->add) == SRC(AIMM) && !bigc(i->s.imm)) {
op2(i, Olwz, Ro1);
AIRR(Ocmpi, Rcrf0, Ro1, i->s.imm);
op = swapbraop(op);
} else if((i->add & ARM) == AXIMM) {
opwld(i, Olwz, Ro1);
AIRR(Ocmpi, Rcrf0, Ro1, i->reg);
} else {
op12(i, 0, 0);
ARRR(Ocmp, Rcrf0, Ro1, Ro2);
}
br(op, branch(i));
}
static void
cbrab(Inst *i, int op)
{
if(RESCHED)
schedcheck(i);
if(UXSRC(i->add) == SRC(AIMM)) {
op2(i, Olbz, Ro1);
AIRR(Ocmpi, Rcrf0, Ro1, i->s.imm&0xFF);
op = swapbraop(op);
} else if((i->add & ARM) == AXIMM) {
opwld(i, Olbz, Ro1);
AIRR(Ocmpi, Rcrf0, Ro1, i->reg&0xFF); // mask i->reg?
} else {
op12(i, 1, 1);
ARRR(Ocmp, Rcrf0, Ro1, Ro2);
}
br(op, branch(i));
}
static void
cbraf(Inst *i, int op)
{
if(RESCHED)
schedcheck(i);
opwld(i, Olfd, Rf1);
op2(i, Olfd, Rf2);
ARRR(Ofcmpo, Rcrf0, Rf1, Rf2);
br(op, branch(i));
}
static void
cbral(Inst *i, int cms, int cls, int mode)
{
ulong *cp;
if(RESCHED)
schedcheck(i);
cp = nil;
opwld(i, Olea, Ri);
op2(i, Olea, Rj);
IRR(Olwz, 0,Ri, Ro1);
IRR(Olwz, 0,Rj, Ro2);
ARRR(Ocmp, Rcrf0, Ro1, Ro2);
switch(mode) {
case ANDAND:
cp = code;
br(cms, 0);
break;
case OROR:
br(cms, branch(i));
break;
case EQAND:
br(cms, branch(i));
cp = code;
br(Obne, 0);
break;
}
IRR(Olwz, 4,Ri, Ro1);
IRR(Olwz, 4,Rj, Ro2);
ARRR(Ocmpl, Rcrf0, Ro1, Ro2);
br(cls, branch(i));
if(cp)
PATCH(cp);
}
static void
shrl(Inst *i)
{
// int c;
// if(USRC(i->add) != AIMM) {
punt(i, SRCOP|DSTOP|THREOP, optab[i->op]);
return;
// }
/*
c = i->s.imm;
op2(i, Olea, Ro3);
IRR(Olwz, 0,Ro3, Ro1);
if(c >= 32) {
if((i->add&ARM) != AXNON)
opwst(i, Olea, Ro3);
SRR(Osra, 31, Ro1, Ro2);
IRR(Ostw, 0,Ro3, Ro2);
if(c >= 64) {
IRR(Ostw, 4,Ro3, Ro2);
return;
}
if(c > 32)
SRR(Osra, c-32, Ro1, Ro1);
IRR(Ostw, 4,Ro3, Ro1);
return;
}
IRR(Olwz, 4,Ro3, Ro2);
if((i->add&ARM) != AXNON)
opwst(i, Olea, Ro3);
if(c != 0) {
SRR(Osll, 32-c, Ro1, Ri);
SRR(Osra, c, Ro1, Ro1);
SRR(Osrl, c, Ro2, Ro2);
RRR(Oor, Ri, Ro2, Ro2);
}
IRR(Ostw, 4,Ro3, Ro2);
IRR(Ostw, 0,Ro3, Ro1);
*/
}
static void
shll(Inst *i)
{
// int c;
// if(USRC(i->add) != AIMM) {
punt(i, SRCOP|DSTOP|THREOP, optab[i->op]);
return;
// }
/*
c = i->s.imm;
if(c >= 64) {
opwst(i, Olea, Ro3);
IRR(Ostw, 0,Ro3, Rzero);
IRR(Ostw, 4,Ro3, Rzero);
return;
}
op2(i, Olea, Ro3);
if(c >= 32) {
IRR(Olwz, 4,Ro3, Ro1);
if((i->add&ARM) != AXNON)
opwst(i, Olea, Ro3);
IRR(Ostw, 4,Ro3, Rzero);
if(c > 32)
SRR(Osll, c-32, Ro1, Ro1);
IRR(Ostw, 0,Ro3, Ro1);
return;
}
IRR(Olwz, 4,Ro3, Ro2);
IRR(Olwz, 0,Ro3, Ro1);
if((i->add&ARM) != AXNON)
opwst(i, Olea, Ro3);
if(c != 0) {
SRR(Osrl, 32-c, Ro2, Ri);
SRR(Osll, c, Ro2, Ro2);
SRR(Osll, c, Ro1, Ro1);
RRR(Oor, Ri, Ro1, Ro1);
}
IRR(Ostw, 4,Ro3, Ro2);
IRR(Ostw, 0,Ro3, Ro1);
*/
}
static void
compdbg(void)
{
print("%s:%lud@%.8lux\n", R.M->m->name, *(ulong*)R.m, *(ulong*)R.s);
}
static void
comp(Inst *i)
{
int o, q, b;
ulong *cp, *cp1;
char buf[64];
if(0) {
Inst xx;
xx.add = AXIMM|SRC(AIMM);
xx.s.imm = (ulong)code;
xx.reg = i-mod->prog;
punt(&xx, SRCOP, compdbg);
}
switch(i->op) {
default:
snprint(buf, sizeof buf, "%s compile, no '%D'", mod->name, i);
error(buf);
break;
case IMCALL:
if((i->add&ARM) == AXIMM)
commcall(i);
else
punt(i, SRCOP|DSTOP|THREOP|WRTPC|NEWPC, optab[i->op]);
break;
case ISEND:
case IRECV:
case IALT:
punt(i, SRCOP|DSTOP|TCHECK|WRTPC, optab[i->op]);
break;
case ISPAWN:
punt(i, SRCOP|DBRAN, optab[i->op]);
break;
case IBNEC:
case IBEQC:
case IBLTC:
case IBLEC:
case IBGTC:
case IBGEC:
punt(i, SRCOP|DBRAN|NEWPC|WRTPC, optab[i->op]);
break;
case ICASEC:
comcase(i, 0);
punt(i, SRCOP|DSTOP|NEWPC, optab[i->op]);
break;
case ICASEL:
comcasel(i);
punt(i, SRCOP|DSTOP|NEWPC, optab[i->op]);
break;
case IADDC:
case IMULL:
case IDIVL:
case IMODL:
case IMNEWZ:
case ILSRW:
case ILSRL:
punt(i, SRCOP|DSTOP|THREOP, optab[i->op]);
break;
case IMFRAME:
if((i->add&ARM) == AXIMM)
commframe(i);
else
punt(i, SRCOP|DSTOP|THREOP, optab[i->op]);
break;
case ILOAD:
case INEWA:
case INEWAZ:
case INEW:
case INEWZ:
case ISLICEA:
case ISLICELA:
case ICONSB:
case ICONSW:
case ICONSL:
case ICONSF:
case ICONSM:
case ICONSMP:
case ICONSP:
case IMOVMP:
case IHEADMP:
case IINSC:
case ICVTAC:
case ICVTCW:
case ICVTWC:
case ICVTCL:
case ICVTLC:
case ICVTFC:
case ICVTCF:
case ICVTFL:
case ICVTLF:
case ICVTRF:
case ICVTFR:
case ICVTWS:
case ICVTSW:
case IMSPAWN:
case ICVTCA:
case ISLICEC:
case INBALT:
punt(i, SRCOP|DSTOP, optab[i->op]);
break;
case INEWCM:
case INEWCMP:
punt(i, SRCOP|DSTOP|THREOP, optab[i->op]);
break;
case INEWCB:
case INEWCW:
case INEWCF:
case INEWCP:
case INEWCL:
punt(i, DSTOP|THREOP, optab[i->op]);
break;
case IEXIT:
punt(i, 0, optab[i->op]);
break;
case ICVTWB:
op13(i, Olwz, Ostb);
break;
case ICVTBW:
op13(i, Olbz, Ostw);
break;
case IMOVB:
if(USRC(i->add) == AIMM && i->s.imm == 0) {
opwst(i, Ostb, Rzero);
break;
}
op13(i, Olbz, Ostb);
break;
case IMOVW:
if(USRC(i->add) == AIMM && i->s.imm == 0) {
opwst(i, Ostw, Rzero);
break;
}
op13(i, Olwz, Ostw);
break;
case ICVTLW:
opwld(i, Olea, Ro1);
AIRR(Olwz, Ro2, Ro1,4);
opwst(i, Ostw, Ro2);
break;
case ICVTWL:
opwld(i, Olwz, Ro1);
opwst(i, Olea, Ro2);
LRRR(Osrawi, Ro3, Ro1, 31);
AIRR(Ostw, Ro1, Ro2,4);
AIRR(Ostw, Ro3, Ro2,0);
break;
case IHEADM:
opwld(i, Olwz, Ro1);
AIRR(Oaddi, Ro1, Ro1,OA(List,data));
movmem(i);
break;
case IMOVM:
opwld(i, Olea, Ro1);
movmem(i);
break;
case IRET:
jmp(base+macro[MacRET]);
break;
case IFRAME:
if(UXSRC(i->add) != SRC(AIMM)) {
punt(i, SRCOP|DSTOP, optab[i->op]);
break;
}
tinit[i->s.imm] = 1;
ldc((ulong)mod->type[i->s.imm], Ri);
jmpl(base+macro[MacFRAM]);
opwst(i, Ostw, Ro1);
break;
case ILEA:
op13(i, Olea, Ostw);
break;
case IHEADW:
opwld(i, Olwz, Ro1);
AIRR(Olwz, Ro1, Ro1,OA(List,data));
opwst(i, Ostw, Ro1);
break;
case IHEADF:
opwld(i, Olwz, Ro1);
AIRR(Olfd, Rf1, Ro1,OA(List,data));
opwst(i, Ostfd, Rf1);
break;
case IHEADB:
opwld(i, Olwz, Ro1);
AIRR(Olbz, Ro1, Ro1,OA(List,data));
opwst(i, Ostb, Ro1);
break;
case ITAIL:
opwld(i, Olwz, Ro1);
AIRR(Olwz, Ro1, Ro1,O(List,tail));
goto movp;
case IMOVP:
opwld(i, Olwz, Ro1);
goto movp;
case IHEADP:
opwld(i, Olwz, Ro1);
AIRR(Olwz, Ro1, Ro1,OA(List,data));
movp:
CMPH(Ro1);
cp = code;
br(Obeq, 0);
jmpl(base+macro[MacCOLR]);
PATCH(cp);
opwst(i, Olea, Ro3);
AIRR(Olwz, Ri, Ro3,0);
AIRR(Ostw, Ro1, Ro3,0);
jmpl(base+macro[MacFRP]);
break;
case ILENA:
opwld(i, Olwz, Ri);
ldc(0, Ro1);
CMPH(Ri);
cp = code;
br(Obeq, 0);
AIRR(Olwz, Ro1, Ri,O(Array,len));
PATCH(cp);
opwst(i, Ostw, Ro1);
break;
case ILENC:
opwld(i, Olwz, Ri);
ldc(0, Ro1);
CMPH(Ri);
cp = code;
br(Obeq, 0);
AIRR(Olwz, Ro1, Ri,O(String,len));
AIRR(Ocmpi, Rcrf0, Ro1, 0);
br(Obge, 2*4); // BGE 2(PC); skip
ARRR(Oneg, Ro1, Ro1, 0);
PATCH(cp);
opwst(i, Ostw, Ro1);
break;
case ILENL:
opwld(i, Olwz, Ro1);
ldc(0, Ro3);
CMPH(Ro1);
cp = code;
br(Obeq, 0);
cp1 = code;
AIRR(Olwz, Ro1, Ro1,O(List,tail));
AIRR(Oaddi, Ro3, Ro3, 1);
CMPH(Ro1);
br(Obne, ((ulong)cp1-(ulong)code));
PATCH(cp);
opwst(i, Ostw, Ro3);
break;
case IMOVL:
opwld(i, Olea, Ro1);
AIRR(Olwz, Ro2, Ro1,0);
AIRR(Olwz, Ro3, Ro1,4);
opwst(i, Olea, Ro1);
AIRR(Ostw, Ro2, Ro1,0);
AIRR(Ostw, Ro3, Ro1,4);
break;
case IMOVF:
opwld(i, Olfd, Rf1);
opwst(i, Ostfd, Rf1);
break;
case ICVTFW:
if(!macjit){
opwld(i, Olfd, Rf1);
jmpl(base+macro[MacCVTFW]);
opwst(i, Ostw, Ro1);
break;
}
case ICVTWF:
punt(i, SRCOP|DSTOP, optab[i->op]);
break;
case INEGF:
opwld(i, Olfd, Rf1);
ARRR(Ofneg, Rf2, 0, Rf1);
opwst(i, Ostfd, Rf2);
break;
case IXORL:
case IORL:
case IANDL:
case IADDL:
case ISUBL:
opwld(i, Olea, Ro1);
op2(i, Olea, Ro3);
AIRR(Olwz, Rj, Ro1,4); /* ls */
AIRR(Olwz, Ro2, Ro3,4);
AIRR(Olwz, Ri, Ro1,0); /* ms */
AIRR(Olwz, Ro1, Ro3,0);
switch(i->op) {
case IXORL:
o = Oxor;
goto l1;
case IORL:
o = Oor;
goto l1;
case IANDL:
o = Oand;
l1:
LRRR(o, Ro1, Ri, Ro1);
LRRR(o, Ro2, Rj, Ro2);
break;
case IADDL:
RRR(Oaddc, Rj,Ro2, Ro2);
RRR(Oadde, Ri,Ro1, Ro1);
break;
case ISUBL:
RRR(Osubfc, Ro2,Rj, Ro2);
RRR(Osubfe, Ro1,Ri, Ro1);
break;
}
if((i->add&ARM) != AXNON)
opwst(i, Olea, Ro3);
IRR(Ostw, 0,Ro3, Ro1);
IRR(Ostw, 4,Ro3, Ro2);
break;
case ISHLL:
shll(i);
break;
case ISHRL:
shrl(i);
break;
case IADDF: o = Ofadd; goto f1;
case ISUBF: o = Ofsub; goto f1;
case IMULF: o = Ofmul; goto f1;
case IDIVF: o = Ofdiv; goto f1;
f1:
opwld(i, Olfd, Rf1);
op2(i, Olfd, Rf2);
if(o == Ofmul)
gen(o | (Rf2<<21) | (Rf2<<16) | (Rf1<<6)); /* odd one out: op D,A,-,C */
else
ARRR(o, Rf2, Rf2, Rf1);
opwst(i, Ostfd, Rf2);
break;
case IBEQF:
cbraf(i, Obeq);
break;
case IBGEF:
cbraf(i, Obge);
case IBGTF:
cbraf(i, Obgt);
break;
case IBLEF:
cbraf(i, Oble);
break;
case IBLTF:
cbraf(i, Oblt);
break;
case IBNEF:
cbraf(i, Obne);
break;
case IBLTB:
cbrab(i, Oblt);
break;
case IBLEB:
cbrab(i, Oble);
break;
case IBGTB:
cbrab(i, Obgt);
break;
case IBGEB:
cbrab(i, Obge);
break;
case IBEQB:
cbrab(i, Obeq);
break;
case IBNEB:
cbrab(i, Obne);
break;
case IBLTW:
cbra(i, Oblt);
break;
case IBLEW:
cbra(i, Oble);
break;
case IBGTW:
cbra(i, Obgt);
break;
case IBGEW:
cbra(i, Obge);
break;
case IBEQW:
cbra(i, Obeq);
break;
case IBNEW:
cbra(i, Obne);
break;
case IBEQL:
cbral(i, Obne, Obeq, ANDAND);
break;
case IBNEL:
cbral(i, Obne, Obne, OROR);
break;
case IBLTL:
cbral(i, Oblt, Oblt, EQAND);
break;
case IBLEL:
cbral(i, Oblt, Oble, EQAND);
break;
case IBGTL:
cbral(i, Obgt, Obgt, EQAND);
break;
case IBGEL:
cbral(i, Obgt, Obge, EQAND);
break;
case ISUBB:
case IADDB:
case IANDB:
case IORB:
case IXORB:
case IMODB:
case IDIVB:
case IMULB:
b = 1;
op12(i, b, b);
goto s2;
case ISHLB:
case ISHRB:
b = 1;
op12(i, 0, b);
goto s2;
case ISUBW:
case IADDW:
case IANDW:
case IORW:
case IXORW:
case ISHLW:
case ISHRW:
case IMODW:
case IDIVW:
case IMULW:
b = 0;
op12(i, b, b);
s2:
q = 0;
switch(i->op) {
case ISUBB:
case ISUBW: o = Osubf; q = Osubfic;
// TO DO: if immediate operand, should use opcode q
USED(q);
ARRR(o, Ro3, Ro1, Ro2);
break;
case IADDB:
case IADDW: o = Oadd; q = Oaddi; goto c1;
case IMULB:
case IMULW: o = Omullw; q = Omulli; goto c1;
case IDIVB:
case IDIVW: o = Odivw; goto c1;
c1:
// TO DO: if immediate operand, should use opcode q
USED(q);
ARRR(o, Ro3, Ro2, Ro1);
break;
case IANDB:
case IANDW: o = Oand; goto c2;
case IORB:
case IORW: o = Oor; goto c2;
case IXORB:
case IXORW: o = Oxor; goto c2;
case ISHLB:
case ISHLW: o = Oslw; goto c2;
case ISHRB:
case ISHRW: o = Osraw; goto c2;
c2:
LRRR(o, Ro3,Ro2,Ro1);
break;
case IMODB:
case IMODW:
ARRR(Odivw, Ro3, Ro2, Ro1);
ARRR(Omullw, Ro3, Ro3, Ro1);
ARRR(Osubf, Ro3, Ro3, Ro2);
break;
}
opwst(i, b? Ostb: Ostw, Ro3);
break;
case ICALL:
opwld(i, Olwz, Ro1); /* f = T(s) */
ldbigc((ulong)(base+patch[i-mod->prog+1]), Ro2); /* R.pc */
AIRR(Ostw, Rfp, Ro1,O(Frame,fp)); /* f->fp = R.fp */
AIRR(Ostw, Ro2, Ro1,O(Frame,lr)); /* f->lr = R.pc */
AIRR(Oaddi, Rfp, Ro1, 0); /* R.fp = (uchar*)f */
jmp(base+patch[i->d.ins - mod->prog]);
break;
case IJMP:
if(RESCHED)
schedcheck(i);
jmp(base+patch[i->d.ins - mod->prog]);
break;
case IGOTO:
comgoto(i);
break;
case IINDC:
opwld(i, Olwz, Ro1); // Ro1 = string
if((i->add&ARM) != AXIMM)
op2(i, Olwz, Ro2); // Ro2 = i
AIRR(Olwz, Ri, Ro1,O(String,len)); // len<0 => index Runes, otherwise bytes
AIRR(Oaddi, Ro1, Ro1,O(String,data));
AIRR(Ocmpi, Rcrf0, Ri, 0);
if(bflag){
br(Obge, 2*4);
ARRR(Oneg, Ri, Ri, 0);
if((i->add&ARM) != AXIMM)
ARRR(Ocmpl, Rcrf1, Ri, Ro2); /* CMPU len, i */
else
AIRR(Ocmpli, Rcrf1, Ri, i->reg); /* CMPU len, i */
jmpc(Cle1, (ulong*)bounds);
}
cp = code;
br(Obge, 0);
if((i->add&ARM) != AXIMM){
SLWI(Ro2, Ro2, Lg2Rune);
if(sizeof(Rune) == 4)
ARRR(Olwz, Ro3, Ro1, Ro2);
else
ARRR(Olhzx, Ro3, Ro1, Ro2);
} else
mem(Olwz, (short)i->reg<<Lg2Rune, Ro1, Ro3); /* BUG: TO DO: 16-bit signed displacement */
gen(Ob | (2*4)); // skip
PATCH(cp);
if((i->add&ARM) != AXIMM)
ARRR(Olbzx, Ro3, Ro1, Ro2);
else
AIRR(Olbz, Ro3, Ro1,i->reg);
opwst(i, Ostw, Ro3);
break;
case IINDX:
case IINDB:
case IINDF:
case IINDW:
case IINDL:
opwld(i, Olwz, Ro1); /* Ro1 = a */
opwst(i, Olwz, Ro3); /* Ro3 = i */
if(bflag){
AIRR(Olwz, Ro2, Ro1, O(Array, len)); /* Ro2 = a->len */
ARRR(Ocmpl, Rcrf0, Ro3, Ro2); /* CMPU i, len */
jmpc(Cge, (ulong*)bounds);
}
// TO DO: check a != H
AIRR(Olwz, Ro2, Ro1,O(Array,data)); /* Ro2 = a->data */
switch(i->op) {
case IINDX:
AIRR(Olwz, Ri, Ro1,O(Array,t)); // Ri = a->t
AIRR(Olwz, Ro1, Ri,O(Type,size)); // Ro1 = a->t->size
ARRR(Omullw, Ro3, Ro3, Ro1); // Ro3 = i*size
break;
case IINDL:
case IINDF:
SLWI(Ro3, Ro3, 3); /* Ro3 = i*8 */
break;
case IINDW:
SLWI(Ro3, Ro3, 2); /* Ro3 = i*4 */
break;
case IINDB:
/* no further work */
break;
}
ARRR(Oadd, Ro2, Ro2, Ro3); /* Ro2 = i*size + data */
op2(i, Ostw, Ro2);
break;
case ICASE:
comcase(i, 1);
break;
case IRAISE:
punt(i, SRCOP|WRTPC|NEWPC, optab[i->op]);
break;
case IMULX:
case IDIVX:
case ICVTXX:
case IMULX0:
case IDIVX0:
case ICVTXX0:
case IMULX1:
case IDIVX1:
case ICVTXX1:
case ICVTFX:
case ICVTXF:
case IEXPW:
case IEXPL:
case IEXPF:
punt(i, SRCOP|DSTOP|THREOP, optab[i->op]);
break;
case ISELF:
punt(i, DSTOP, optab[i->op]);
break;
}
}
enum {
PREFLEN = 64, /* max instruction words in comvec */
};
static void
preamble(void)
{
ulong *s;
if(comvec != nil)
return;
s = code = malloc(PREFLEN*sizeof(*code));
if(s == nil)
error(exNomem);
#ifdef __ELF__
if(macjit) {
ulong *cp;
int r;
/*
* ELF frame:
* 0(%sp) - back chain
* 4(%sp) - callee's LR save slot
* 8(%sp) to 36(%sp) - 8 words of parameter list area
* 40(%sp) to 48(%sp) - pad to 16 byte alignment/local vars
*/
mfspr(Ro1, Rlr);
AIRR(Ostw, Ro1, Rsp,4);
AIRR(Ostwu, Rsp, Rsp,-128);
MFCR(Ro1);
AIRR(Ostw, Ro1, Rsp,52);
for (r = 14; r < 32; ++r)
AIRR(Ostw, r, Rsp,r*4);
cp = code;
gen(Ob | Lk);
AIRR(Olwz, Ro1, Rsp,52);
MTCR(Ro1);
for (r = 14; r < 32; ++r)
AIRR(Olwz, r, Rsp,r*4);
AIRR(Oaddi, Rsp, Rsp, 128);
AIRR(Olwz, Ro1, Rsp,4);
mtspr(Rlr, Ro1);
LRET();
PATCH(cp);
}
#endif /* __ELF__ */
ldc((ulong)&R, Rreg);
SETR0();
mfspr(Rlink, Rlr);
AIRR(Ostw, Rlink, Rreg,O(REG,xpc));
AIRR(Olwz, Ri, Rreg,O(REG,PC));
mtspr(Rctr, Ri);
AIRR(Olwz, Rfp, Rreg,O(REG,FP));
AIRR(Olwz, Rmp, Rreg,O(REG,MP));
gen(Obctr);
if(code >= (ulong*)(s + PREFLEN))
urk("preamble");
comvec = (void*)s;
segflush(s, PREFLEN*sizeof(*s));
if(cflag > 3) {
print("comvec\n");
while(s < code)
s += das(s);
}
}
static void
macfrp(void)
{
CMPH(Ri);
gen(Obclr | Ceq); // arg == $H? => return
AIRR(Olwz, Ro2, Ri,O(Heap,ref)-sizeof(Heap));
AIRR(Oaddic_, Rj, Ro2, -1); // ref(arg)-- and test
AIRR(Ostw, Rj, Ri,O(Heap,ref)-sizeof(Heap));
gen(Obclr | Cne); // ref(arg) nonzero? => return
AIRR(Ostw, Ro2, Ri,O(Heap,ref)-sizeof(Heap)); // restore ref count of 1 for destroy
mfspr(Rlink, Rlr);
AIRR(Ostw, Rlink, Rreg,O(REG,st));
AIRR(Ostw, Rfp, Rreg,O(REG,FP));
AIRR(Ostw, Ri, Rreg,O(REG,s));
jmpl((ulong*)rdestroy); // CALL destroy
ldc((ulong)&R, Rreg);
SETR0();
AIRR(Olwz, Rlink, Rreg,O(REG,st));
mtspr(Rlr, Rlink);
AIRR(Olwz, Rfp, Rreg,O(REG,FP));
AIRR(Olwz, Rmp, Rreg,O(REG,MP));
LRET();
}
static void
macret(void)
{
ulong *cp1, *cp2, *cp3, *cp4, *cp5, *linterp;
Inst i;
AIRR(Olwz, Ro1, Rfp,O(Frame,t));
AIRR(Ocmpi, Rcrf0, Ro1, 0);
cp1 = code;
br(Obeq, 0); // t(Rfp) == 0
AIRR(Olwz, Rpic, Ro1,O(Type,destroy));
AIRR(Ocmpi, Rcrf0, Rpic, 0);
cp2 = code;
br(Obeq, 0); // destroy(t(fp)) == 0
AIRR(Olwz, Ro2, Rfp,O(Frame,fp));
AIRR(Ocmpi, Rcrf0, Ro2, 0);
cp3 = code;
br(Obeq, 0); // fp(Rfp) == 0
AIRR(Olwz, Ro3, Rfp,O(Frame,mr));
AIRR(Ocmpi, Rcrf0, Ro3, 0);
cp4 = code;
br(Obeq, 0); // mr(Rfp) == 0
AIRR(Olwz, Ro2, Rreg,O(REG,M));
AIRR(Olwz, Ro3, Ro2,O(Heap,ref)-sizeof(Heap));
AIRR(Oaddic_, Ro3, Ro3, -1); // --ref(arg), set cc
cp5 = code;
br(Obeq, 0); // --ref(arg) == 0?
AIRR(Ostw, Ro3, Ro2,O(Heap,ref)-sizeof(Heap));
AIRR(Olwz, Ro1, Rfp,O(Frame,mr));
AIRR(Ostw, Ro1, Rreg,O(REG,M));
AIRR(Olwz, Rmp, Ro1,O(Modlink,MP));
AIRR(Ostw, Rmp, Rreg,O(REG,MP));
AIRR(Olwz, Ro3, Ro1,O(Modlink,compiled)); // R.M->compiled?
AIRR(Ocmpi, Rcrf0, Ro3, 0);
linterp = code;
br(Obeq, 0);
PATCH(cp4);
jrl(Rpic); // call destroy(t(fp))
AIRR(Ostw, Rfp, Rreg,O(REG,SP));
AIRR(Olwz, Ro1, Rfp,O(Frame,lr));
AIRR(Olwz, Rfp, Rfp,O(Frame,fp));
AIRR(Ostw, Rfp, Rreg,O(REG,FP)); // R.FP = Rfp
jr(Ro1); // goto lr(Rfp)
PATCH(linterp);
jrl(Rpic); // call destroy(t(fp))
AIRR(Ostw, Rfp, Rreg,O(REG,SP));
AIRR(Olwz, Ro1, Rfp,O(Frame,lr));
AIRR(Olwz, Rfp, Rfp,O(Frame,fp));
AIRR(Ostw, Ro1, Rreg,O(REG,PC)); // R.PC = fp->lr
AIRR(Ostw, Rfp, Rreg,O(REG,FP)); // R.FP = Rfp
AIRR(Olwz, Rpic, Rreg,O(REG,xpc));
mtspr(Rlr, Rpic);
gen(Oblr); // return to xec uncompiled code
PATCH(cp1);
PATCH(cp2);
PATCH(cp3);
PATCH(cp5);
i.add = AXNON;
punt(&i, TCHECK|NEWPC, optab[IRET]);
}
static void
maccase(void)
{
ulong *cp1, *cp2, *cp3, *loop;
/*
* Ro1 = value (input arg), t
* Ro2 = count, n
* Ro3 = table pointer (input arg)
* Ri = n/2, n2
* Rj = pivot element t+n/2*3, l
*/
IRR(Olwz, 0,Ro3, Ro2); // count
IRR(Oaddi, 0,Ro3, Rlink); // initial table pointer
loop = code; // loop:
AIRR(Ocmpi, Rcrf0, Ro2, 0);
cp1 = code;
br(Oble, 0); // n <= 0? goto out
LRRR(Osrawi, Ri, Ro2, 1); // n2 = n>>1
SLWI(Rj, Ri, 1);
ARRR(Oadd, Rj, Rj, Ri);
SLWI(Rj, Rj, 2);
ARRR(Oadd, Rj, Rj, Ro3); // l = t + n2*3;
AIRR(Olwz, Rpic, Rj,4);
ARRR(Ocmp, Rcrf0, Ro1, Rpic);
cp2 = code;
br(Oblt, 0); // v < l[1]? goto low
IRR(Olwz, 8,Rj, Rpic);
ARRR(Ocmp, Rcrf0, Ro1, Rpic);
cp3 = code;
br(Obge, 0); // v >= l[2]? goto high
IRR(Olwz, 12,Rj, Ro3); // found
jr(Ro3);
PATCH(cp2); // low:
IRR(Oaddi, 0, Ri, Ro2); // n = n2
jmp(loop);
PATCH(cp3); // high:
IRR(Oaddi, 12, Rj, Ro3); // t = l+3;
IRR(Oaddi, 1, Ri, Rpic);
RRR(Osubf, Ro2, Rpic, Ro2); // n -= n2 + 1
jmp(loop);
PATCH(cp1); // out:
IRR(Olwz, 0,Rlink, Ro2); // initial n
SLWI(Ro3, Ro2, 1);
RRR(Oadd, Ro3, Ro2, Ro2);
SLWI(Ro2, Ro2, 2);
RRR(Oadd, Ro2, Rlink, Rlink);
IRR(Olwz, 4,Rlink, Ro3); // (initial t)[n*3+1]
jr(Ro3);
}
static void
macmcal(void)
{
ulong *cp;
AIRR(Olwz, Ro2, Ri,O(Modlink,prog));
mfspr(Rlink, Rlr);
AIRR(Ostw, Rlink, Ro1,O(Frame,lr)); // f->lr = return
AIRR(Ocmpi, Rcrf0, Ro2, 0);
AIRR(Oaddi, Rfp, Ro1, 0); // R.FP = f
cp = code;
br(Obne, 0); // CMPL ml->m->prog != 0
AIRR(Ostw, Rlink, Rreg,O(REG,st));
AIRR(Ostw, Ro1, Rreg,O(REG,FP));
AIRR(Ostw, Rj, Rreg,O(REG,dt));
jmpl((ulong*)rmcall); // CALL rmcall
ldc((ulong)&R, Rreg);
SETR0();
AIRR(Olwz, Rlink, Rreg,O(REG,st));
mtspr(Rlr, Rlink);
AIRR(Olwz, Rfp, Rreg,O(REG,FP));
AIRR(Olwz, Rmp, Rreg,O(REG,MP));
gen(Oblr); // RET
PATCH(cp);
AIRR(Olwz, Ro2, Ri,O(Heap,ref)-sizeof(Heap));
AIRR(Ostw, Ri, Rreg,O(REG,M));
AIRR(Oaddi, Ro2, Ro2, 1);
AIRR(Olwz, Rmp, Ri,O(Modlink,MP));
AIRR(Ostw, Ro2, Ri,O(Heap,ref)-sizeof(Heap));
AIRR(Ostw, Rmp, Rreg,O(REG,MP));
AIRR(Olwz, Ro2, Ri,O(Modlink,compiled));
AIRR(Ocmpi, Rcrf0, Ro2, 0);
mtspr(Rctr, Rj);
gen(Obcctr | Cne); // return to compiled code
AIRR(Ostw, Rfp, Rreg,O(REG,FP)); // R.FP = Rfp
AIRR(Ostw, Rj, Rreg,O(REG,PC)); // R.PC = Rj
AIRR(Olwz, Rpic, Rreg,O(REG,xpc));
mtspr(Rlr, Rpic);
gen(Oblr); // return to xec uncompiled code
}
static void
macmfra(void)
{
mfspr(Rlink, Rlr);
AIRR(Ostw, Rlink, Rreg,O(REG,st));
AIRR(Ostw, Rfp, Rreg,O(REG,FP));
AIRR(Ostw, Ri, Rreg,O(REG,s));
AIRR(Ostw, Rj, Rreg,O(REG,d));
jmpl((ulong*)rmfram);
ldc((ulong)&R, Rreg);
SETR0();
AIRR(Olwz, Rlink, Rreg,O(REG,st));
mtspr(Rlr, Rlink);
AIRR(Olwz, Rfp, Rreg,O(REG,FP));
AIRR(Olwz, Rmp, Rreg,O(REG,MP));
gen(Oblr);
}
static void
macfram(void)
{
ulong *cp;
/*
* Ri has t
*/
AIRR(Olwz, Ro2, Ri,O(Type,size)); // MOVW t->size, Ro3
AIRR(Olwz, Ro1, Rreg,O(REG,SP)); // MOVW R.SP, Ro1 (=(Frame*)R.SP)
AIRR(Olwz, Ro3, Rreg,O(REG,TS)); // MOVW R.TS, tmp
ARRR(Oadd, Ro2, Ro2, Ro1); // ADD Ro1, t->size, nsp
ARRR(Ocmpl, Rcrf0, Ro2, Ro3); // CMPU nsp,tmp (nsp >= R.TS?)
cp = code;
br(Obge, 0); // BGE expand
AIRR(Olwz, Rj, Ri,O(Type,initialize));
mtspr(Rctr, Rj);
AIRR(Ostw, Ro2, Rreg,O(REG,SP)); // R.SP = nsp
AIRR(Ostw, Rzero, Ro1,O(Frame,mr)); // Ro1->mr = nil
AIRR(Ostw, Ri, Ro1,O(Frame,t)); // Ro1->t = t
gen(Obctr); // become t->init(Ro1), returning Ro1
PATCH(cp); // expand:
AIRR(Ostw, Ri, Rreg,O(REG,s)); // MOVL t, R.s
mfspr(Rlink, Rlr);
AIRR(Ostw, Rlink, Rreg,O(REG,st)); // MOVL Rlink, R.st
AIRR(Ostw, Rfp, Rreg,O(REG,FP)); // MOVL RFP, R.FP
jmpl((ulong*)extend); // CALL extend
ldc((ulong)&R, Rreg);
SETR0();
AIRR(Olwz, Rlink, Rreg,O(REG,st)); // reload registers
mtspr(Rlr, Rlink);
AIRR(Olwz, Rfp, Rreg,O(REG,FP));
AIRR(Olwz, Rmp, Rreg,O(REG,MP));
AIRR(Olwz, Ro1, Rreg,O(REG,s)); // return R.s set by extend
LRET(); // RET
}
static void
movloop(int ldu, int stu, int adj)
{
ulong *cp;
AIRR(Oaddi, Ro1, Ro1, -adj); // adjust for update ld/st
AIRR(Oaddi, Ro3, Ro3, -adj);
mtspr(Rctr, Ro2);
cp = code; // l0:
AIRR(ldu, Ri, Ro1,adj);
AIRR(stu, Ri, Ro3,adj);
br(Obc | Cdnz, ((ulong)cp-(ulong)code)); // DBNZ l0
}
static void
movmem(Inst *i)
{
ulong *cp;
// source address already in Ro1
if((i->add&ARM) != AXIMM){
op2(i, Olwz, Ro2);
AIRR(Ocmpi, Rcrf0, Ro2, 0);
cp = code;
br(Oble, 0);
opwst(i, Olea, Ro3);
movloop(Olbzu, Ostbu, 1);
PATCH(cp);
return;
}
switch(i->reg){
case 4:
AIRR(Olwz, Ro2, Ro1,0);
opwst(i, Ostw, Ro2);
break;
case 8:
AIRR(Olwz, Ro2, Ro1,0);
opwst(i, Olea, Ro3);
AIRR(Olwz, Ro1, Ro1,4);
AIRR(Ostw, Ro2, Ro3,0);
AIRR(Ostw, Ro1, Ro3,4);
break;
default:
// could use lwsi/stwsi loop...
opwst(i, Olea, Ro3);
if((i->reg&3) == 0) {
ldc(i->reg>>2, Ro2);
movloop(Olwzu, Ostwu, 4);
} else {
ldc(i->reg, Ro2);
movloop(Olbzu, Ostbu, 1);
}
break;
}
}
static void
maccolr(void)
{
ldbigc((ulong)&mutator, Ri);
AIRR(Olwz, Ri, Ri,0);
AIRR(Olwz, Ro3, Ro1,O(Heap,color)-sizeof(Heap)); // h->color
AIRR(Olwz, Ro2, Ro1,O(Heap,ref)-sizeof(Heap)); // h->ref
ARRR(Ocmp, Rcrf0, Ri, Ro3);
AIRR(Oaddi, Ro2, Ro2, 1); // h->ref++
AIRR(Ostw, Ro2, Ro1,O(Heap,ref)-sizeof(Heap));
gen(Obclr | Ceq); // return if h->color == mutator
ldc(propagator, Ro3);
AIRR(Ostw, Ro3, Ro1,O(Heap,color)-sizeof(Heap)); // h->color = propagator
ldc((ulong)&nprop, Ro3);
AIRR(Ostw, Ro1, Ro3,0); // nprop = !0
LRET();
}
static void
maccvtfw(void)
{
ulong *cp;
ARRR(Ofcmpo, Rcrf0, Rf1, Rfzero);
ARRR(Ofneg, Rf2, 0, Rfhalf);
cp = code;
br(Oblt, 0);
ARRR(Ofmr, Rf2, 0, Rfhalf);
PATCH(cp);
ARRR(Ofadd, Rf1, Rf1, Rf2); //x<0? x-.5: x+.5
ARRR(Ofctiwz, Rf2, 0, Rf1);
/* avoid using Ostfdu for now, since software emulation will run on same stack */
if(0){
AIRR(Ostfdu, Rf2, Rsp,-8); // MOVDU Rf2, -8(R1) (store in temp)
}else{
AIRR(Oaddi, Rsp, Rsp, -8); // SUB $8, R1
AIRR(Ostfd, Rf2, Rsp,0); // MOVD Rf2, 0(R1) (store in temp)
}
AIRR(Olwz, Ro1, Rsp,4); // MOVW 4(R1), Ro1
AIRR(Oaddi, Rsp, Rsp, 8); // ADD $8, R1
LRET();
}
static void
macrelq(void)
{
ARRR(Ocrxor, Rcrbrel, Rcrbrel, Rcrbrel); /* clear the relinquish condition */
mfspr(Rlink, Rlr);
IRR(Ostw, O(REG,FP),Rreg, Rfp);
IRR(Ostw, O(REG,PC),Rreg, Rlink);
IRR(Olwz, O(REG,xpc),Rreg, Ro2);
jr(Ro2);
}
static void
macend(void)
{
}
void
comd(Type *t)
{
int i, j, m, c;
mfspr(Rlink, Rlr);
AIRR(Ostw, Rlink, Rreg,O(REG,dt));
for(i = 0; i < t->np; i++) {
c = t->map[i];
j = i<<5;
for(m = 0x80; m != 0; m >>= 1) {
if(c & m) {
mem(Olwz, j, Rfp, Ri);
jmpl(base+macro[MacFRP]);
}
j += sizeof(WORD*);
}
}
AIRR(Olwz, Rlink, Rreg,O(REG,dt));
mtspr(Rlr, Rlink);
gen(Oblr);
}
void
comi(Type *t)
{
int i, j, m, c;
ldc((ulong)H, Ri);
for(i = 0; i < t->np; i++) {
c = t->map[i];
j = i<<5;
for(m = 0x80; m != 0; m >>= 1) {
if(c & m)
mem(Ostw, j, Ro1, Ri);
j += sizeof(WORD*);
}
}
LRET();
}
void
typecom(Type *t)
{
int n;
ulong *tmp, *start;
if(t == nil || t->initialize != 0)
return;
tmp = mallocz(4096*sizeof(ulong), 0);
if(tmp == nil)
error(exNomem);
code = tmp;
comi(t);
n = code - tmp;
code = tmp;
comd(t);
n += code - tmp;
free(tmp);
n *= sizeof(*code);
code = mallocz(n, 0);
if(code == nil)
return;
start = code;
t->initialize = code;
comi(t);
t->destroy = code;
comd(t);
segflush(start, n);
if(cflag > 3)
print("typ= %.8lux %4d i %.8lux d %.8lux asm=%d\n",
(ulong)t, t->size, (ulong)t->initialize, (ulong)t->destroy, n);
}
static void
patchex(Module *m, ulong *p)
{
Handler *h;
Except *e;
if((h = m->htab) == nil)
return;
for( ; h->etab != nil; h++){
h->pc1 = p[h->pc1];
h->pc2 = p[h->pc2];
for(e = h->etab; e->s != nil; e++)
e->pc = p[e->pc];
if(e->pc != -1)
e->pc = p[e->pc];
}
}
int
compile(Module *m, int size, Modlink *ml)
{
Link *l;
Modl *e;
int i, n;
ulong *s, *tmp;
base = nil;
patch = mallocz(size*sizeof(*patch), ROMABLE);
tinit = malloc(m->ntype*sizeof(*tinit));
tmp = malloc(4096*sizeof(ulong));
if(tinit == nil || patch == nil || tmp == nil)
goto bad;
preamble();
mod = m;
n = 0;
pass = 0;
nlit = 0;
for(i = 0; i < size; i++) {
code = tmp;
comp(&m->prog[i]);
if(code >= &tmp[4096]) {
print("%3d %D\n", i, &m->prog[i]);
urk("tmp ovflo");
}
patch[i] = n;
n += code - tmp;
}
for(i=0; macinit[i].f; i++) {
code = tmp;
(*macinit[i].f)();
macro[macinit[i].o] = n;
n += code - tmp;
}
base = mallocz((n+nlit)*sizeof(*base), 0);
if(base == nil)
goto bad;
if(cflag > 3)
print("dis=%5d %5d ppc=%5d asm=%.8lux lit=%d: %s\n",
size, size*sizeof(Inst), n, (ulong)base, nlit, m->name);
pass++;
nlit = 0;
litpool = base+n;
code = base;
n = 0;
for(i = 0; i < size; i++) {
s = code;
comp(&m->prog[i]);
if(patch[i] != n) {
print("%3d %D\n", i, &m->prog[i]);
urk("phase error");
}
n += code - s;
if(cflag > 3) {
print("%3d %D\n", i, &m->prog[i]);
while(s < code)
s += das(s);
}/**/
}
for(i=0; macinit[i].f; i++) {
if(macro[macinit[i].o] != n) {
print("macinit %d\n", macinit[i].o);
urk("phase error");
}
s = code;
(*macinit[i].f)();
n += code - s;
if(cflag > 3) {
print("macinit %d\n", macinit[i].o);
while(s < code)
s += das(s);
}/**/
}
for(l = m->ext; l->name; l++) {
l->u.pc = (Inst*)(base+patch[l->u.pc-m->prog]);
typecom(l->frame);
}
if(ml != nil) {
e = &ml->links[0];
for(i = 0; i < ml->nlinks; i++) {
e->u.pc = (Inst*)(base+patch[e->u.pc-m->prog]);
typecom(e->frame);
e++;
}
}
for(i = 0; i < m->ntype; i++) {
if(tinit[i] != 0)
typecom(m->type[i]);
}
patchex(m, patch);
m->entry = (Inst*)(base+patch[mod->entry-mod->prog]);
free(patch);
free(tinit);
free(tmp);
free(m->prog);
m->prog = (Inst*)base;
m->compiled = 1;
segflush(base, n*sizeof(*base));
return 1;
bad:
free(patch);
free(tinit);
free(base);
free(tmp);
return 0;
}