ref: db1eb844461b07a25ca49117851fa874fd88e065
dir: /libinterp/comp-arm.c/
#include "lib9.h"
#include "isa.h"
#include "interp.h"
#include "raise.h"
/*
* to do:
* eliminate litpool?
* eliminate long constants in comi/comd
* enable and check inline FP code (not much point with fpemu)
*/
#define RESCHED 1 /* check for interpreter reschedule */
#define SOFTFP 1
enum
{
R0 = 0,
R1 = 1,
R2 = 2,
R3 = 3,
R4 = 4,
R5 = 5,
R6 = 6,
R7 = 7,
R8 = 8,
R9 = 9,
R10 = 10,
R11 = 11,
R12 = 12, /* C's SB */
R13 = 13, /* C's SP */
R14 = 14, /* Link Register */
R15 = 15, /* PC */
RLINK = 14,
RFP = R9, /* Frame Pointer */
RMP = R8, /* Module Pointer */
RTA = R7, /* Intermediate address for double indirect */
RCON = R6, /* Constant builder */
RREG = R5, /* Pointer to REG */
RA3 = R4, /* gpr 3 */
RA2 = R3, /* gpr 2 2+3 = L */
RA1 = R2, /* gpr 1 */
RA0 = R1, /* gpr 0 0+1 = L */
FA2 = 2, /* Floating */
FA3 = 3,
FA4 = 4,
FA5 = 5,
EQ = 0,
NE = 1,
CS = 2,
CC = 3,
MI = 4,
PL = 5,
VS = 6,
VC = 7,
HI = 8,
LS = 9,
GE = 10,
LT = 11,
GT = 12,
LE = 13,
AL = 14,
NV = 15,
HS = CS,
LO = CC,
And = 0,
Eor = 1,
Sub = 2,
Rsb = 3,
Add = 4,
Adc = 5,
Sbc = 6,
Rsc = 7,
Tst = 8,
Teq = 9,
Cmp = 10,
Cmn = 11,
Orr = 12,
Mov = 13,
Bic = 14,
Mvn = 15,
Adf = 0,
Muf = 1,
Suf = 2,
Rsf = 3,
Dvf = 4,
Rdf = 5,
Rmf = 8,
Mvf = 0,
Mnf = 1,
Abs = 2,
Rnd = 3,
Flt = 0,
Fix = 1,
Cmf = 4,
Cnf = 5,
Lea = 100, /* macro memory ops */
Ldw,
Ldb,
Stw,
Stb,
Ldf,
Stf,
Ldh,
Blo = 0, /* offset of low order word in big */
Bhi = 4, /* offset of high order word in big */
Lg2Rune = 2,
NCON = (0xFFC-8)/4,
SRCOP = (1<<0),
DSTOP = (1<<1),
WRTPC = (1<<2),
TCHECK = (1<<3),
NEWPC = (1<<4),
DBRAN = (1<<5),
THREOP = (1<<6),
ANDAND = 1,
OROR = 2,
EQAND = 3,
MacFRP = 0,
MacRET,
MacCASE,
MacCOLR,
MacMCAL,
MacFRAM,
MacMFRA,
MacRELQ,
NMACRO
};
#define BITS(B) (1<<B)
#define IMM(O) (O & ((1<<12)-1))
#define SBIT (1<<20)
#define PBIT (1<<24)
#define UPBIT (1<<23)
#define LDW(C, Rn, Rd, O) *code++ = (C<<28)|(1<<26)|(1<<24)|(1<<23)|(1<<20)|\
(Rn<<16)|(Rd<<12)|IMM(O)
#define STW(C, Rn, Rd, O) *code++ = (C<<28)|(1<<26)|(1<<24)|(1<<23)|\
(Rn<<16)|(Rd<<12)|IMM(O)
#define LDB(C, Rn, Rd, O) *code++ = (C<<28)|(1<<26)|(1<<24)|(1<<23)|(1<<20)|(1<<22)|\
(Rn<<16)|(Rd<<12)|IMM(O)
#define STB(C, Rn, Rd, O) *code++ = (C<<28)|(1<<26)|(1<<24)|(1<<23)|(1<<22)|\
(Rn<<16)|(Rd<<12)|IMM(O)
#define LDxP(C, Rn, Rd, O, B) *code++ = (C<<28)|(1<<26)|(B<<22)|(1<<23)|(1<<20)|\
(Rn<<16)|(Rd<<12)|IMM(O)
#define STxP(C, Rn, Rd, O, B) *code++ = (C<<28)|(1<<26)|(B<<22)|(1<<23)|\
(Rn<<16)|(Rd<<12)|IMM(O)
#define LDRW(C, Rn, Rd, SH, R) *code++ = (C<<28)|(3<<25)|(1<<24)|(1<<23)|(1<<20)|\
(Rn<<16)|(Rd<<12)|(SH<<4)|R
#define STRW(C, Rn, Rd, SH, R) *code++ = (C<<28)|(3<<25)|(1<<24)|(1<<23)|\
(Rn<<16)|(Rd<<12)|(SH<<4)|R
#define LDRB(C, Rn, Rd, SH, R) *code++ = (C<<28)|(3<<25)|(1<<24)|(1<<23)|(1<<20)|(1<<22)|\
(Rn<<16)|(Rd<<12)|(SH<<4)|R
#define STRB(C, Rn, Rd, SH, R) *code++ = (C<<28)|(3<<25)|(1<<24)|(1<<23)|(1<<22)|\
(Rn<<16)|(Rd<<12)|(SH<<4)|R
#define DPI(C, Op, Rn, Rd, RO, O) *code++ = (C<<28)|(1<<25)|(Op<<21)|\
(Rn<<16)|(Rd<<12)|(RO<<8)|((O)&0xff)
#define DP(C, Op, Rn, Rd, Sh, Ro) *code++ = (C<<28)|(Op<<21)|(Rn<<16)|\
(Rd<<12)|((Sh)<<4)|Ro
#define CMPI(C, Rn, Rd, RO, O) *code++ = (C<<28)|(1<<25)|(Cmp<<21)|(1<<20)|\
(Rn<<16)|(Rd<<12)|(RO<<8)|((O)&0xff)
#define CMNI(C, Rn, Rd, RO, O) *code++ = (C<<28)|(1<<25)|(Cmn<<21)|(1<<20)|\
(Rn<<16)|(Rd<<12)|(RO<<8)|((O)&0xff)
#define CMP(C, Rn, Rd, Sh, Ro) *code++ = (C<<28)|(Cmp<<21)|(Rn<<16)|(1<<20)|\
(Rd<<12)|((Sh)<<4)|Ro
#define CMN(C, Rn, Rd, Sh, Ro) *code++ = (C<<28)|(Cmn<<21)|(Rn<<16)|(1<<20)|\
(Rd<<12)|((Sh)<<4)|Ro
#define MUL(C, Rm, Rs, Rd) *code++ = (C<<28)|(Rd<<16)|(Rm<<0)|(Rs<<8)|\
(9<<4)
#define LDF(C, Rn, Fd, O) *code++ = (C<<28)|(6<<25)|(1<<24)|(1<<23)|(1<<20)|\
(Rn<<16)|(1<<15)|(Fd<<12)|(1<<8)|((O)&0xff)
#define STF(C, Rn, Fd, O) *code++ = (C<<28)|(6<<25)|(1<<24)|(1<<23)|\
(Rn<<16)|(1<<15)|(Fd<<12)|(1<<8)|((O)&0xff)
#define CMF(C, Fn, Fm) *code++ = (C<<28)|(7<<25)|(4<<21)|(1<<20)|(Fn<<16)|\
(0xF<<12)|(1<<8)|(1<<4)|(Fm)
#define LDH(C, Rn, Rd, O) *code++ = (C<<28)|(0<<25)|(1<<24)|(1<<23)|(1<<22)|(1<<20)|\
(Rn<<16)|(Rd<<12)|(((O)&0xf0)<<4)|(0xb<<4)|((O)&0xf)
#define LDRH(C, Rn, Rd, Rm) *code++ = (C<<28)|(0<<25)|(1<<24)|(1<<23)|(1<<20)|\
(Rn<<16)|(Rd<<12)|(0xb<<4)|Rm
#define CPDO2(C, Op, Fn, Fd, Fm) *code++ = (C<<28)|(0xE<<24)|(Op<<20)|(Fn<<16)|(Fd<<12)|(1<<8)|(1<<7)|(Fm)
#define CPDO1(C, Op, Fd, Fm) CPDO2((C),(Op),0,(Fd),(Fm))|(1<<15)
#define CPFLT(C, Fn, Rd) *code++ = (C<<28)|(0xE<<24)|(0<<20)|(Fn<<16)|(Rd<<12)|(1<<8)|(9<<4)
#define CPFIX(C, Rd, Fm) *code++ = (C<<28)|(0xE<<24)|(1<<20)|(0<<16)|(Rd<<12)|(1<<8)|(9<<4)|(Fm)
#define BRAW(C, o) ((C<<28)|(5<<25)|((o) & 0x00ffffff))
#define BRA(C, o) gen(BRAW((C),(o)))
#define IA(s, o) (ulong)(base+s[o])
#define BRADIS(C, o) BRA(C, (IA(patch, o)-(ulong)code-8)>>2)
#define BRAMAC(r, o) BRA(r, (IA(macro, o)-(ulong)code-8)>>2)
#define BRANCH(C, o) gen(BRAW(C, ((ulong)(o)-(ulong)code-8)>>2))
#define CALL(o) gen(BRAW(AL, ((ulong)(o)-(ulong)code-8)>>2)|(1<<24))
#define CCALL(C,o) gen(BRAW((C), ((ulong)(o)-(ulong)code-8)>>2)|(1<<24))
#define CALLMAC(C,o) gen(BRAW((C), (IA(macro, o)-(ulong)code-8)>>2)|(1<<24))
#define RELPC(pc) (ulong)(base+(pc))
#define RETURN DPI(AL, Add, RLINK, R15, 0, 0)
#define CRETURN(C) DPI(C, Add, RLINK, R15, 0, 0)
#define PATCH(ptr) *ptr |= (((ulong)code-(ulong)(ptr)-8)>>2) & 0x00ffffff
#define MOV(src, dst) DP(AL, Mov, 0, dst, 0, src)
#define FITS12(v) ((ulong)(v)<BITS(12))
#define FITS8(v) ((ulong)(v)<BITS(8))
#define FITS5(v) ((ulong)(v)<BITS(5))
/* assumes H==-1 */
#define CMPH(C, r) CMNI(C, r, 0, 0, 1)
#define NOTNIL(r) (CMPH(AL, (r)), CCALL(EQ, nullity))
/* array bounds checking */
#define BCK(r, rb) (CMP(AL, rb, 0, 0, r), CCALL(LS, bounds))
#define BCKI(i, rb) (CMPI(AL, rb, 0, 0, i), CCALL(LS, bounds))
#define BCKR(i, rb) (CMPI(AL, rb, 0, 0, 0)|(i), CCALL(LS, bounds))
static ulong* code;
static ulong* base;
static ulong* patch;
static ulong codeoff;
static int pass;
static int puntpc = 1;
static Module* mod;
static uchar* tinit;
static ulong* litpool;
static int nlit;
static ulong macro[NMACRO];
void (*comvec)(void);
static void macfrp(void);
static void macret(void);
static void maccase(void);
static void maccolr(void);
static void macmcal(void);
static void macfram(void);
static void macmfra(void);
static void macrelq(void);
static void movmem(Inst*);
static void mid(Inst*, int, int);
extern void das(ulong*, int);
#define T(r) *((void**)(R.r))
struct
{
int idx;
void (*gen)(void);
char* name;
} mactab[] =
{
MacFRP, macfrp, "FRP", /* decrement and free pointer */
MacRET, macret, "RET", /* return instruction */
MacCASE, maccase, "CASE", /* case instruction */
MacCOLR, maccolr, "COLR", /* increment and color pointer */
MacMCAL, macmcal, "MCAL", /* mcall bottom half */
MacFRAM, macfram, "FRAM", /* frame instruction */
MacMFRA, macmfra, "MFRA", /* punt mframe because t->initialize==0 */
MacRELQ, macrelq, /* reschedule */
};
typedef struct Const Const;
struct Const
{
ulong o;
ulong* code;
ulong* pc;
};
typedef struct Con Con;
struct Con
{
int ptr;
Const table[NCON];
};
static Con rcon;
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;
if(R.d == H)
error(exModule);
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;
}
static void
urk(char *s)
{
USED(s);
error(exCompile); //production
//panic("compile failed: urk: %s\n", s); //debugging
}
static void
gen(ulong w)
{
*code++ = w;
}
static long
immrot(ulong v)
{
int i;
for(i=0; i<16; i++) {
if((v & ~0xff) == 0)
return (i<<8) | v | (1<<25);
v = (v<<2) | (v>>30);
}
return 0;
}
static long
immaddr(long v)
{
if(v >= 0 && v <= 0xfff)
return (v & 0xfff) |
(1<<24) | /* pre indexing */
(1<<23); /* pre indexing, up */
if(v >= -0xfff && v < 0)
return (-v & 0xfff) |
(1<<24); /* pre indexing */
return 0;
}
static void
flushcon(int genbr)
{
int i;
Const *c;
ulong disp;
if(rcon.ptr == 0)
return;
if(genbr){
if(0)print("BR %d(PC)=%8.8p (len=%d)\n", (rcon.ptr*4+4-8)>>2, code+rcon.ptr+1, rcon.ptr);
BRA(AL, (rcon.ptr*4+4-8)>>2);
}
c = &rcon.table[0];
for(i = 0; i < rcon.ptr; i++) {
if(pass){
disp = (code - c->code) * sizeof(*code) - 8;
if(disp >= BITS(12))
print("INVALID constant range %lud", disp);
if(0)print("data %8.8p %8.8lux (%8.8p, ins=%8.8lux cpc=%8.8p)\n", code, c->o, c->code, *c->code, c->pc);
*c->code |= (disp&0xfff);
}
*code++ = c->o;
c++;
}
rcon.ptr = 0;
}
static void
flushchk(void)
{
if(rcon.ptr >= NCON || rcon.ptr > 0 && (code+codeoff+2-rcon.table[0].pc)*sizeof(*code) >= BITS(12)-256){ // 256 allows for a little delay in calling flushchk
if(0)print("flushed constant table: len %ux disp %ld\n", rcon.ptr, (code+codeoff-rcon.table[0].pc)*sizeof(*code)-8);
flushcon(1);
}
}
static void
ccon(int cc, ulong o, int r, int opt)
{
ulong u;
Const *c;
if(opt != 0) {
u = o & ~0xff;
if(u == 0) {
DPI(cc, Mov, 0, r, 0, o);
return;
}
if(u == ~0xff) {
DPI(cc, Mvn, 0, r, 0, ~o);
return;
}
u = immrot(o);
if(u) {
DPI(cc, Mov, 0, r, 0, 0) | u;
return;
}
u = o & ~0xffff;
if(u == 0) {
DPI(cc, Mov, 0, r, 0, o);
DPI(cc, Orr, r, r, (24/2), o>>8);
return;
}
}
flushchk();
c = &rcon.table[rcon.ptr++];
c->o = o;
c->code = code;
c->pc = code+codeoff;
LDW(cc, R15, r, 0);
}
static void
memc(int c, int inst, ulong disp, int rm, int r)
{
int bit;
if(inst == Lea) {
if(disp < BITS(8)) {
if(disp != 0 || rm != r)
DPI(c, Add, rm, r, 0, disp);
return;
}
if(-disp < BITS(8)) {
DPI(c, Sub, rm, r, 0, -disp);
return;
}
bit = immrot(disp);
if(bit) {
DPI(c, Add, rm, r, 0, 0) | bit;
return;
}
ccon(c, disp, RCON, 1);
DP(c, Add, rm, r, 0, RCON);
return;
}
if(disp < BITS(12) || -disp < BITS(12)) { /* Direct load */
if(disp < BITS(12))
bit = 0;
else {
disp = -disp;
bit = UPBIT;
}
switch(inst) {
case Ldw:
LDW(c, rm, r, disp);
break;
case Ldb:
LDB(c, rm, r, disp);
break;
case Stw:
STW(c, rm, r, disp);
break;
case Stb:
STB(c, rm, r, disp);
break;
}
if(bit)
code[-1] ^= bit;
return;
}
ccon(c, disp, RCON, 1);
switch(inst) {
case Ldw:
LDRW(c, rm, r, 0, RCON);
break;
case Ldb:
LDRB(c, rm, r, 0, RCON);
break;
case Stw:
STRW(c, rm, r, 0, RCON);
break;
case Stb:
STRB(c, rm, r, 0, RCON);
break;
}
}
static void
con(ulong o, int r, int opt)
{
ccon(AL, o, r, opt);
}
static void
mem(int inst, ulong disp, int rm, int r)
{
memc(AL, inst, disp, rm, r);
}
static void
opx(int mode, Adr *a, int mi, int r, int li)
{
int ir, rta;
switch(mode) {
default:
urk("opx");
case AFP:
mem(mi, a->ind, RFP, r);
return;
case AMP:
mem(mi, a->ind, RMP, r);
return;
case AIMM:
con(a->imm, r, 1);
if(mi == Lea) { /* could be simpler if con generates reachable literal */
mem(Stw, li, RREG, r);
mem(Lea, li, RREG, r);
}
return;
case AIND|AFP:
ir = RFP;
break;
case AIND|AMP:
ir = RMP;
break;
}
rta = RTA;
if(mi == Lea)
rta = r;
mem(Ldw, a->i.f, ir, rta);
mem(mi, a->i.s, rta, r);
}
static void
opwld(Inst *i, int op, int reg)
{
opx(USRC(i->add), &i->s, op, reg, O(REG, st));
}
static void
opwst(Inst *i, int op, int reg)
{
opx(UDST(i->add), &i->d, op, reg, O(REG, dt));
}
static void
memfl(int cc, int inst, ulong disp, int rm, int r)
{
int bit, wd;
wd = (disp&03)==0;
bit = 0;
if(wd && disp < BITS(10))
disp >>= 2; /* direct load */
else if(wd && -disp < BITS(10)){
bit = UPBIT;
disp = -disp >> 2;
}else{
ccon(cc, disp, RCON, 1);
DP(cc, Add, RCON, RCON, 0, rm);
rm = RCON;
disp = 0;
}
switch(inst) {
case Ldf:
LDF(cc, rm, r, disp);
break;
case Stf:
STF(cc, rm, r, disp);
break;
}
if(bit)
code[-1] ^= bit;
}
static void
opfl(Adr *a, int am, int mi, int r)
{
int ir;
switch(am) {
default:
urk("opfl");
case AFP:
memfl(AL, mi, a->ind, RFP, r);
return;
case AMP:
memfl(AL, mi, a->ind, RMP, r);
return;
case AIND|AFP:
ir = RFP;
break;
case AIND|AMP:
ir = RMP;
break;
}
mem(Ldw, a->i.f, ir, RTA);
memfl(AL, mi, a->i.s, RTA, r);
}
static void
opflld(Inst *i, int mi, int r)
{
opfl(&i->s, USRC(i->add), mi, r);
}
static void
opflst(Inst *i, int mi, int r)
{
opfl(&i->d, UDST(i->add), mi, r);
}
static void
literal(ulong imm, int roff)
{
nlit++;
con((ulong)litpool, RTA, 0);
mem(Stw, roff, RREG, RTA);
if(pass == 0)
return;
*litpool = imm;
litpool++;
}
static void
schedcheck(Inst *i)
{
if(RESCHED && i->d.ins <= i){
mem(Ldw, O(REG, IC), RREG, RA0);
DPI(AL, Sub, RA0, RA0, 0, 1) | SBIT;
mem(Stw, O(REG, IC), RREG, RA0);
/* CMPI(AL, RA0, 0, 0, 1); */
CALLMAC(LE, MacRELQ);
}
}
static void
bounds(void)
{
/* mem(Stw, O(REG,FP), RREG, RFP); */
error(exBounds);
}
static void
nullity(void)
{
/* mem(Stw, O(REG,FP), RREG, RFP); */
error(exNilref);
}
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, Lea, RA0);
mem(Stw, O(REG, s), RREG, RA0);
}
}
if(m & DSTOP) {
opwst(i, Lea, RA0);
mem(Stw, O(REG, d), RREG, RA0);
}
if(m & WRTPC) {
con(RELPC(patch[i-mod->prog+1]), RA0, 0);
mem(Stw, O(REG, PC), RREG, RA0);
}
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) {
mem(Ldw, O(REG, d), RREG, RA0);
mem(Stw, O(REG, m), RREG, RA0);
}
break;
case AXIMM:
literal((short)i->reg, O(REG,m));
break;
case AXINF:
mem(Lea, i->reg, RFP, RA2);
mem(Stw, O(REG, m), RREG, RA2);
break;
case AXINM:
mem(Lea, i->reg, RMP, RA2);
mem(Stw, O(REG, m), RREG, RA2);
break;
}
mem(Stw, O(REG, FP), RREG, RFP);
CALL(fn);
con((ulong)&R, RREG, 1);
if(m & TCHECK) {
mem(Ldw, O(REG, t), RREG, RA0);
CMPI(AL, RA0, 0, 0, 0);
memc(NE, Ldw, O(REG, xpc), RREG, RLINK);
CRETURN(NE); /* if(R.t) goto(R.xpc) */
}
mem(Ldw, O(REG, FP), RREG, RFP);
mem(Ldw, O(REG, MP), RREG, RMP);
if(m & NEWPC){
mem(Ldw, O(REG, PC), RREG, R15);
flushcon(0);
}
}
static void
midfl(Inst *i, int mi, int r)
{
int ir;
switch(i->add&ARM) {
default:
opflst(i, mi, r);
return;
case AXIMM:
con((short)i->reg, r, 1); // BUG
return;
case AXINF:
ir = RFP;
break;
case AXINM:
ir = RMP;
break;
}
memfl(AL, mi, i->reg, ir, r);
}
static void
mid(Inst *i, int mi, int r)
{
int ir;
switch(i->add&ARM) {
default:
opwst(i, mi, r);
return;
case AXIMM:
if(mi == Lea)
urk("mid/lea");
con((short)i->reg, r, 1);
return;
case AXINF:
ir = RFP;
break;
case AXINM:
ir = RMP;
break;
}
mem(mi, i->reg, ir, r);
}
static int
swapbraop(int b)
{
switch(b) {
case GE:
return LE;
case LE:
return GE;
case GT:
return LT;
case LT:
return GT;
}
return b;
}
static void
cbra(Inst *i, int r)
{
if(RESCHED)
schedcheck(i);
if(UXSRC(i->add) == SRC(AIMM) && FITS8(i->s.imm)) {
mid(i, Ldw, RA1);
CMPI(AL, RA1, 0, 0, i->s.imm);
r = swapbraop(r);
} else if(UXSRC(i->add) == SRC(AIMM) && FITS8(-i->s.imm)) {
mid(i, Ldw, RA1);
CMNI(AL, RA1, 0, 0, -i->s.imm);
r = swapbraop(r);
} else if((i->add & ARM) == AXIMM && FITS8(i->reg)) {
opwld(i, Ldw, RA1);
CMPI(AL, RA1, 0, 0, i->reg);
} else if((i->add & ARM) == AXIMM && FITS8(-(short)i->reg)) {
opwld(i, Ldw, RA1);
CMNI(AL, RA1, 0, 0, -(short)i->reg);
} else {
opwld(i, Ldw, RA0);
mid(i, Ldw, RA1);
CMP(AL, RA0, 0, 0, RA1);
}
BRADIS(r, i->d.ins-mod->prog);
}
static void
cbrab(Inst *i, int r)
{
if(RESCHED)
schedcheck(i);
if(UXSRC(i->add) == SRC(AIMM)) {
mid(i, Ldb, RA1);
CMPI(AL, RA1, 0, 0, i->s.imm&0xFF);
r = swapbraop(r);
} else if((i->add & ARM) == AXIMM) {
opwld(i, Ldb, RA1);
CMPI(AL, RA1, 0, 0, i->reg&0xFF);
} else {
opwld(i, Ldb, RA0);
mid(i, Ldb, RA1);
CMP(AL, RA0, 0, 0, RA1);
}
BRADIS(r, i->d.ins-mod->prog);
}
static void
cbral(Inst *i, int jmsw, int jlsw, int mode)
{
ulong dst, *label;
if(RESCHED)
schedcheck(i);
opwld(i, Lea, RA1);
mid(i, Lea, RA3);
mem(Ldw, Bhi, RA1, RA2);
mem(Ldw, Bhi, RA3, RA0);
CMP(AL, RA2, 0, 0, RA0);
label = nil;
dst = i->d.ins-mod->prog;
switch(mode) {
case ANDAND:
label = code;
BRA(jmsw, 0);
break;
case OROR:
BRADIS(jmsw, dst);
break;
case EQAND:
BRADIS(jmsw, dst);
label = code;
BRA(NE, 0);
break;
}
mem(Ldw, Blo, RA3, RA0);
mem(Ldw, Blo, RA1, RA2);
CMP(AL, RA2, 0, 0, RA0);
BRADIS(jlsw, dst);
if(label != nil)
PATCH(label);
}
static void
cbraf(Inst *i, int r)
{
if(RESCHED)
schedcheck(i);
if(!SOFTFP){
ulong *s=code;
opflld(i, Ldf, FA4);
midfl(i, Ldf, FA2);
CMF(AL, FA4, FA2);
BRADIS(r, i->d.ins-mod->prog);
if(pass){print("%D\n", i); das(s, code-s);}
}else
punt(i, SRCOP|THREOP|DBRAN|NEWPC|WRTPC, optab[i->op]);
}
static void
comcase(Inst *i, int w)
{
int l;
WORD *t, *e;
if(w != 0) {
opwld(i, Ldw, RA1); // v
opwst(i, Lea, RA3); // table
BRAMAC(AL, 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] = RELPC(patch[t[2]]);
t += 3;
}
t[0] = RELPC(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] = RELPC(patch[t[4]]);
t += 6;
}
t[0] = RELPC(patch[t[0]]);
}
static void
commframe(Inst *i)
{
ulong *punt, *mlnil;
opwld(i, Ldw, RA0);
CMPH(AL, RA0);
mlnil = code;
BRA(EQ, 0);
if((i->add&ARM) == AXIMM) {
mem(Ldw, OA(Modlink, links)+i->reg*sizeof(Modl)+O(Modl, frame), RA0, RA3);
} else {
mid(i, Ldw, RA1);
DP(AL, Add, RA0, RA1, (3<<3), RA1); // assumes sizeof(Modl) == 8
mem(Ldw, OA(Modlink, links)+O(Modl, frame), RA1, RA3);
}
mem(Ldw, O(Type, initialize), RA3, RA1);
CMPI(AL, RA1, 0, 0, 0);
punt = code;
BRA(NE, 0);
opwst(i, Lea, RA0);
/* Type in RA3, destination in RA0 */
PATCH(mlnil);
con(RELPC(patch[i-mod->prog+1]), RLINK, 0);
BRAMAC(AL, MacMFRA);
/* Type in RA3 */
PATCH(punt);
CALLMAC(AL, MacFRAM);
opwst(i, Stw, RA2);
}
static void
commcall(Inst *i)
{
ulong *mlnil;
opwld(i, Ldw, RA2);
con(RELPC(patch[i-mod->prog+1]), RA0, 0);
mem(Stw, O(Frame, lr), RA2, RA0);
mem(Stw, O(Frame, fp), RA2, RFP);
mem(Ldw, O(REG, M), RREG, RA3);
mem(Stw, O(Frame, mr), RA2, RA3);
opwst(i, Ldw, RA3);
CMPH(AL, RA3);
mlnil = code;
BRA(EQ, 0);
if((i->add&ARM) == AXIMM) {
mem(Ldw, OA(Modlink, links)+i->reg*sizeof(Modl)+O(Modl, u.pc), RA3, RA0);
} else {
mid(i, Ldw, RA1);
DP(AL, Add, RA3, RA1, (3<<3), RA1); // assumes sizeof(Modl) == 8
mem(Ldw, OA(Modlink, links)+O(Modl, u.pc), RA1, RA0);
}
PATCH(mlnil);
CALLMAC(AL, MacMCAL);
}
static void
larith(Inst *i, int op, int opc)
{
opwld(i, Lea, RA0);
mid(i, Lea, RA3);
mem(Ldw, Blo, RA0, RA1); // ls
mem(Ldw, Blo, RA3, RA2);
DP(AL, op, RA2, RA2, 0, RA1) | SBIT; // ls: RA2 = RA2 op RA1
mem(Ldw, Bhi, RA0, RA1);
mem(Ldw, Bhi, RA3, RA0);
DP(AL, opc, RA0, RA0, 0, RA1); // ms: RA0 = RA0 opc RA1
if((i->add&ARM) != AXNON)
opwst(i, Lea, RA3);
mem(Stw, Blo, RA3, RA2);
mem(Stw, Bhi, RA3, RA0);
}
static void
movloop(Inst *i, int s)
{
int b;
b = (s==1);
opwst(i, Lea, RA2);
LDxP(AL, RA1, RA0, s, b);
STxP(AL, RA2, RA0, s, b);
DPI(AL, Sub, RA3, RA3, 0, 1) | SBIT;
BRA(NE, (-3*4-8)>>2);
}
static void
movmem(Inst *i)
{
ulong *cp;
// source address already in RA1
if((i->add&ARM) != AXIMM){
mid(i, Ldw, RA3);
CMPI(AL, RA3, 0, 0, 0);
cp = code;
BRA(LE, 0);
movloop(i, 1);
PATCH(cp);
return;
}
switch(i->reg){
case 0:
break;
case 4:
LDW(AL, RA1, RA2, 0);
opwst(i, Stw, RA2);
break;
case 8:
LDW(AL, RA1, RA2, 0);
opwst(i, Lea, RA3);
LDW(AL, RA1, RA1, 4);
STW(AL, RA3, RA2, 0);
STW(AL, RA3, RA1, 4);
break;
default:
// could use ldm/stm loop...
if((i->reg&3) == 0) {
con(i->reg>>2, RA3, 1);
movloop(i, 4);
} else {
con(i->reg, RA3, 1);
movloop(i, 1);
}
break;
}
}
static
void
compdbg(void)
{
print("%s:%lud@%.8lux\n", R.M->m->name, *(ulong*)R.m, *(ulong*)R.s);
}
static void
comgoto(Inst *i)
{
WORD *t, *e;
opwld(i, Ldw, RA1);
opwst(i, Lea, RA0);
LDRW(AL, RA0, R15, (2<<3), RA1);
flushcon(0);
if(pass == 0)
return;
t = (WORD*)(mod->origmp+i->d.ind);
e = t + t[-1];
t[-1] = 0;
while(t < e) {
t[0] = RELPC(patch[t[0]]);
t++;
}
}
static void
comp(Inst *i)
{
int r, imm;
char buf[64];
//ulong *s = code;
if(0) {
Inst xx;
xx.add = AXIMM|SRC(AIMM);
xx.s.imm = (ulong)code;
xx.reg = i-mod->prog;
puntpc = 0;
punt(&xx, SRCOP, compdbg);
puntpc = 1;
flushcon(1);
}
flushchk();
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:
case IMODW:
case IMODB:
case IDIVW:
case IDIVB:
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 IHEADB:
case IHEADW:
case IHEADL:
case IINSC:
case ICVTAC:
case ICVTCW:
case ICVTWC:
case ICVTLC:
case ICVTCL:
case ICVTFC:
case ICVTCF:
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 IMFRAME:
if((i->add&ARM) == AXIMM)
commframe(i);
else
punt(i, SRCOP|DSTOP|THREOP, optab[i->op]);
break;
case ICASE:
comcase(i, 1);
break;
case IGOTO:
comgoto(i);
break;
case IMOVF:
if(!SOFTFP){
opflld(i, Ldf, FA2);
opflst(i, Stf, FA2);
break;
}
/* if no hardware, just fall through */
case IMOVL:
opwld(i, Lea, RA1);
LDW(AL, RA1, RA2, 0);
LDW(AL, RA1, RA3, 4);
opwst(i, Lea, RA1);
STW(AL, RA1, RA2, 0);
STW(AL, RA1, RA3, 4);
break;
break;
case IHEADM:
opwld(i, Ldw, RA1);
NOTNIL(RA1);
if(OA(List,data) != 0)
DPI(AL, Add, RA1, RA1, 0, OA(List,data));
movmem(i);
break;
/*
case IHEADW:
opwld(i, Ldw, RA0);
NOTNIL(RA0);
mem(Ldw, OA(List, data), RA0, RA0);
opwst(i, Stw, RA0);
break;
*/
case IMOVM:
opwld(i, Lea, RA1);
movmem(i);
break;
case IFRAME:
if(UXSRC(i->add) != SRC(AIMM)) {
punt(i, SRCOP|DSTOP, optab[i->op]);
break;
}
tinit[i->s.imm] = 1;
con((ulong)mod->type[i->s.imm], RA3, 1);
CALL(base+macro[MacFRAM]);
opwst(i, Stw, RA2);
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 ICVTBW:
opwld(i, Ldb, RA0);
opwst(i, Stw, RA0);
break;
case ICVTWB:
opwld(i, Ldw, RA0);
opwst(i, Stb, RA0);
break;
case ILEA:
opwld(i, Lea, RA0);
opwst(i, Stw, RA0);
break;
case IMOVW:
opwld(i, Ldw, RA0);
opwst(i, Stw, RA0);
break;
case IMOVB:
opwld(i, Ldb, RA0);
opwst(i, Stb, RA0);
break;
case ITAIL:
opwld(i, Ldw, RA0);
NOTNIL(RA0);
mem(Ldw, O(List, tail), RA0, RA1);
goto movp;
case IMOVP:
opwld(i, Ldw, RA1);
goto movp;
case IHEADP:
opwld(i, Ldw, RA0);
NOTNIL(RA0);
mem(Ldw, OA(List, data), RA0, RA1);
movp:
CMPH(AL, RA1);
CALLMAC(NE, MacCOLR); // colour if not H
opwst(i, Lea, RA2);
mem(Ldw, 0,RA2, RA0);
mem(Stw, 0,RA2, RA1);
CALLMAC(AL, MacFRP);
break;
case ILENA:
opwld(i, Ldw, RA1);
con(0, RA0, 1);
CMPH(AL, RA1);
LDW(NE, RA1, RA0, O(Array,len));
opwst(i, Stw, RA0);
break;
case ILENC:
opwld(i, Ldw, RA1);
con(0, RA0, 1);
CMPH(AL, RA1);
memc(NE, Ldw, O(String,len),RA1, RA0);
CMPI(AL, RA0, 0, 0, 0);
DPI(LT, Rsb, RA0, RA0, 0, 0);
opwst(i, Stw, RA0);
break;
case ILENL:
con(0, RA0, 1);
opwld(i, Ldw, RA1);
CMPH(AL, RA1);
LDW(NE, RA1, RA1, O(List, tail));
DPI(NE, Add, RA0, RA0, 0, 1);
BRA(NE, (-4*3-8)>>2);
opwst(i, Stw, RA0);
break;
case ICALL:
opwld(i, Ldw, RA0);
con(RELPC(patch[i-mod->prog+1]), RA1, 0);
mem(Stw, O(Frame, lr), RA0, RA1);
mem(Stw, O(Frame, fp), RA0, RFP);
MOV(RA0, RFP);
BRADIS(AL, i->d.ins-mod->prog);
flushcon(0);
break;
case IJMP:
if(RESCHED)
schedcheck(i);
BRADIS(AL, i->d.ins-mod->prog);
flushcon(0);
break;
case IBEQW:
cbra(i, EQ);
break;
case IBNEW:
cbra(i, NE);
break;
case IBLTW:
cbra(i, LT);
break;
case IBLEW:
cbra(i, LE);
break;
case IBGTW:
cbra(i, GT);
break;
case IBGEW:
cbra(i, GE);
break;
case IBEQB:
cbrab(i, EQ);
break;
case IBNEB:
cbrab(i, NE);
break;
case IBLTB:
cbrab(i, LT);
break;
case IBLEB:
cbrab(i, LE);
break;
case IBGTB:
cbrab(i, GT);
break;
case IBGEB:
cbrab(i, GE);
break;
case IBEQF:
cbraf(i, EQ);
break;
case IBNEF:
cbraf(i, NE);
break;
case IBLTF:
cbraf(i, LT);
break;
case IBLEF:
cbraf(i, LE);
break;
case IBGTF:
cbraf(i, GT);
break;
case IBGEF:
cbraf(i, GE);
break;
case IRET:
mem(Ldw, O(Frame,t), RFP, RA1);
BRAMAC(AL, MacRET);
break;
case IMULW:
opwld(i, Ldw, RA1);
mid(i, Ldw, RA0);
MUL(AL, RA1, RA0, RA0);
opwst(i, Stw, RA0);
break;
case IMULB:
opwld(i, Ldb, RA1);
mid(i, Ldb, RA0);
MUL(AL, RA1, RA0, RA0);
opwst(i, Stb, RA0);
break;
case IORW:
r = Orr;
goto arithw;
case IANDW:
r = And;
goto arithw;
case IXORW:
r = Eor;
goto arithw;
case ISUBW:
r = Sub;
goto arithw;
case IADDW:
r = Add;
arithw:
mid(i, Ldw, RA1);
if(UXSRC(i->add) == SRC(AIMM) && FITS8(i->s.imm))
DPI(AL, r, RA1, RA0, 0, i->s.imm);
else if(UXSRC(i->add) == SRC(AIMM) && immrot(i->s.imm)){
DPI(AL, r, RA1, RA0, 0, 0) | immrot(i->s.imm);
//print("rot: %ux %ux\n", i->s.imm, immrot(i->s.imm)); das(code-1, 1);
} else {
opwld(i, Ldw, RA0);
DP(AL, r, RA1, RA0, 0, RA0);
}
opwst(i, Stw, RA0);
break;
case ISHRW:
r = 2;
shiftw:
mid(i, Ldw, RA1);
if(UXSRC(i->add) == SRC(AIMM) && FITS5(i->s.imm))
DP(AL, Mov, 0, RA0, ((i->s.imm&0x3F)<<3)|(r<<1), RA1);
else {
opwld(i, Ldw, RA0);
DP(AL, Mov, 0, RA0, (RA0<<4)|(r<<1)|1, RA1);
}
opwst(i, Stw, RA0);
break;
case ISHLW:
r = 0;
goto shiftw;
break;
case IORB:
r = Orr;
goto arithb;
case IANDB:
r = And;
goto arithb;
case IXORB:
r = Eor;
goto arithb;
case ISUBB:
r = Sub;
goto arithb;
case IADDB:
r = Add;
arithb:
mid(i, Ldb, RA1);
if(UXSRC(i->add) == SRC(AIMM))
DPI(AL, r, RA1, RA0, 0, i->s.imm);
else {
opwld(i, Ldb, RA0);
DP(AL, r, RA1, RA0, 0, RA0);
}
opwst(i, Stb, RA0);
break;
case ISHRB:
r = 2;
goto shiftb;
case ISHLB:
r = 0;
shiftb:
mid(i, Ldb, RA1);
if(UXSRC(i->add) == SRC(AIMM) && FITS5(i->s.imm))
DP(AL, Mov, 0, RA0, ((i->s.imm&0x3F)<<3)|(r<<1), RA1);
else {
opwld(i, Ldw, RA0);
DP(AL, Mov, 0, RA0, (RA0<<4)|(r<<1)|1, RA1);
}
opwst(i, Stb, RA0);
break;
case IINDC:
opwld(i, Ldw, RA1); // RA1 = string
NOTNIL(RA1);
imm = 1;
if((i->add&ARM) != AXIMM || !FITS12((short)i->reg<<Lg2Rune) || immrot((short)i->reg) == 0){
mid(i, Ldw, RA2); // RA2 = i
imm = 0;
}
mem(Ldw, O(String,len),RA1, RA0); // len<0 => index Runes, otherwise bytes
if(bflag){
DPI(AL, Orr, RA0, RA3, 0, 0);
DPI(LT, Rsb, RA3, RA3, 0, 0);
if(imm)
BCKR(immrot((short)i->reg), RA3);
else
BCK(RA2, RA3);
}
DPI(AL, Add, RA1, RA1, 0, O(String,data));
CMPI(AL, RA0, 0, 0, 0);
if(imm){
LDB(GE, RA1, RA3, i->reg);
LDW(LT, RA1, RA3, (short)i->reg<<Lg2Rune);
} else {
LDRB(GE, RA1, RA3, 0, RA2);
DP(LT, Mov, 0, RA2, (Lg2Rune<<3), RA2);
LDRW(LT, RA1, RA3, 0, RA2);
}
opwst(i, Stw, RA3);
//if(pass){print("%D\n", i); das(s, code-s);}
break;
case IINDL:
case IINDF:
case IINDW:
case IINDB:
opwld(i, Ldw, RA0); /* a */
NOTNIL(RA0);
if(bflag)
mem(Ldw, O(Array, len), RA0, RA2);
mem(Ldw, O(Array, data), RA0, RA0);
r = 0;
switch(i->op) {
case IINDL:
case IINDF:
r = 3;
break;
case IINDW:
r = 2;
break;
}
if(UXDST(i->add) == DST(AIMM) && (imm = immrot(i->d.imm)) != 0) {
if(bflag)
BCKR(imm, RA2);
if(i->d.imm != 0)
DPI(AL, Add, RA0, RA0, 0, 0) | immrot(i->d.imm<<r);
} else {
opwst(i, Ldw, RA1);
if(bflag)
BCK(RA1, RA2);
DP(AL, Add, RA0, RA0, r<<3, RA1);
}
mid(i, Stw, RA0);
//if(pass){print("%D\n", i); das(s, code-s);}
break;
case IINDX:
opwld(i, Ldw, RA0); /* a */
NOTNIL(RA0);
opwst(i, Ldw, RA1); /* i */
if(bflag){
mem(Ldw, O(Array, len), RA0, RA2);
BCK(RA1, RA2);
}
mem(Ldw, O(Array, t), RA0, RA2);
mem(Ldw, O(Array, data), RA0, RA0);
mem(Ldw, O(Type, size), RA2, RA2);
MUL(AL, RA2, RA1, RA1);
DP(AL, Add, RA1, RA0, 0, RA0);
mid(i, Stw, RA0);
//if(pass){print("%D\n", i); das(s, code-s);}
break;
case IADDL:
larith(i, Add, Adc);
break;
case ISUBL:
larith(i, Sub, Sbc);
break;
case IORL:
larith(i, Orr, Orr);
break;
case IANDL:
larith(i, And, And);
break;
case IXORL:
larith(i, Eor, Eor);
break;
case ICVTWL:
opwld(i, Ldw, RA1);
opwst(i, Lea, RA2);
DP(AL, Mov, 0, RA0, (0<<3)|(2<<1), RA1); // ASR 32
STW(AL, RA2, RA1, Blo);
STW(AL, RA2, RA0, Bhi);
break;
case ICVTLW:
opwld(i, Lea, RA0);
mem(Ldw, Blo, RA0, RA0);
opwst(i, Stw, RA0);
break;
case IBEQL:
cbral(i, NE, EQ, ANDAND);
break;
case IBNEL:
cbral(i, NE, NE, OROR);
break;
case IBLEL:
cbral(i, LT, LS, EQAND);
break;
case IBGTL:
cbral(i, GT, HI, EQAND);
break;
case IBLTL:
cbral(i, LT, CC, EQAND);
break;
case IBGEL:
cbral(i, GT, CS, EQAND);
break;
case ICVTFL:
case ICVTLF:
punt(i, SRCOP|DSTOP, optab[i->op]);
break;
case IDIVF:
r = Dvf;
goto arithf;
case IMULF:
r = Muf;
goto arithf;
case ISUBF:
r = Suf;
goto arithf;
case IADDF:
r = Adf;
arithf:
if(SOFTFP){
/* software fp */
USED(r);
punt(i, SRCOP|DSTOP|THREOP, optab[i->op]);
break;
}
opflld(i, Ldf, FA2);
midfl(i, Ldf, FA4);
CPDO2(AL, r, FA4, FA4, FA2);
opflst(i, Stf, FA4);
break;
case INEGF:
if(SOFTFP){
punt(i, SRCOP|DSTOP, optab[i->op]);
break;
}
opflld(i, Ldf, FA2);
CPDO1(AL, Mnf, FA2, FA2);
opflst(i, Stf, FA2);
//if(pass){print("%D\n", i); das(s, code-s);}
break;
case ICVTWF:
if(SOFTFP){
punt(i, SRCOP|DSTOP, optab[i->op]);
break;
}
opwld(i, Ldw, RA2);
CPFLT(AL, FA2, RA2);
opflst(i, Stf, FA2);
//if(pass){print("%D\n", i); das(s, code-s);}
break;
case ICVTFW:
if(SOFTFP){
punt(i, SRCOP|DSTOP, optab[i->op]);
break;
}
opflld(i, Ldf, FA2);
CPFIX(AL, RA2, FA2);
opwst(i, Stw, RA2);
//if(pass){print("%D\n", i); das(s, code-s);}
break;
case ISHLL:
/* should do better */
punt(i, SRCOP|DSTOP|THREOP, optab[i->op]);
break;
case ISHRL:
/* should do better */
punt(i, SRCOP|DSTOP|THREOP, optab[i->op]);
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;
}
}
static void
preamble(void)
{
if(comvec)
return;
comvec = malloc(10 * sizeof(*code));
if(comvec == nil)
error(exNomem);
code = (ulong*)comvec;
con((ulong)&R, RREG, 0);
mem(Stw, O(REG, xpc), RREG, RLINK);
mem(Ldw, O(REG, FP), RREG, RFP);
mem(Ldw, O(REG, MP), RREG, RMP);
mem(Ldw, O(REG, PC), RREG, R15);
pass++;
flushcon(0);
pass--;
segflush(comvec, 10 * sizeof(*code));
}
static void
maccase(void)
{
ulong *cp1, *loop, *inner;
/*
* RA1 = value (input arg), t
* RA2 = count, n
* RA3 = table pointer (input arg)
* RA0 = n/2, n2
* RCON = pivot element t+n/2*3, l
*/
LDW(AL, RA3, RA2, 0); // count from table
MOV(RA3, RLINK); // initial table pointer
loop = code; // loop:
CMPI(AL, RA2, 0, 0, 0);
cp1 = code;
BRA(LE, 0); // n <= 0? goto out
inner = code;
DP(AL, Mov, 0, RA0, (1<<3)|2, RA2); // n2 = n>>1
DP(AL, Add, RA0, RCON, (1<<3), RA0); // n' = n2+(n2<<1) = 3*n2
DP(AL, Add, RA3, RCON, (2<<3), RCON); // l = t + n2*3;
LDW(AL, RCON, RTA, 4);
CMP(AL, RA1, 0, 0, RTA);
DP(LT, Mov, 0, RA2, 0, RA0); // v < l[1]? n=n2
BRANCH(LT, loop); // v < l[1]? goto loop
LDW(AL, RCON, RTA, 8);
CMP(AL, RA1, 0, 0, RTA);
LDW(LT, RCON, R15, 12); // v >= l[1] && v < l[2] => found; goto l[3]
// v >= l[2] (high)
DPI(AL, Add, RCON, RA3, 0, 12); // t = l+3;
DPI(AL, Add, RA0, RTA, 0, 1);
DP(AL, Sub, RA2, RA2, 0, RTA) | SBIT; // n -= n2+1
BRANCH(GT, inner); // n > 0? goto loop
PATCH(cp1); // out:
LDW(AL, RLINK, RA2, 0); // initial n
DP(AL, Add, RA2, RA2, (1<<3), RA2); // n = n+(n<<1) = 3*n
DP(AL, Add, RLINK, RLINK, (2<<3), RA2); // t' = &(initial t)[n*3]
LDW(AL, RLINK, R15, 4); // goto (initial t)[n*3+1]
}
static void
macfrp(void)
{
/* destroy the pointer in RA0 */
CMPH(AL, RA0);
CRETURN(EQ); // arg == H? => return
mem(Ldw, O(Heap, ref)-sizeof(Heap), RA0, RA2);
DPI(AL, Sub, RA2, RA2, 0, 1) | SBIT;
memc(NE, Stw, O(Heap, ref)-sizeof(Heap), RA0, RA2);
CRETURN(NE); // --h->ref != 0 => return
mem(Stw, O(REG, FP), RREG, RFP);
mem(Stw, O(REG, st), RREG, RLINK);
mem(Stw, O(REG, s), RREG, RA0);
CALL(rdestroy);
con((ulong)&R, RREG, 1);
mem(Ldw, O(REG, st), RREG, RLINK);
mem(Ldw, O(REG, FP), RREG, RFP);
mem(Ldw, O(REG, MP), RREG, RMP);
RETURN;
flushcon(0);
}
static void
maccolr(void)
{
/* color the pointer in RA1 */
mem(Ldw, O(Heap, ref)-sizeof(Heap), RA1, RA0);
DPI(AL, Add, RA0, RA0, 0, 1);
mem(Stw, O(Heap, ref)-sizeof(Heap), RA1, RA0); // h->ref++
con((ulong)&mutator, RA2, 1);
mem(Ldw, O(Heap, color)-sizeof(Heap), RA1, RA0);
mem(Ldw, 0, RA2, RA2);
CMP(AL, RA0, 0, 0, RA2);
CRETURN(EQ); // return if h->color == mutator
con(propagator, RA2, 1);
mem(Stw, O(Heap, color)-sizeof(Heap), RA1, RA2); // h->color = propagator
con((ulong)&nprop, RA2, 1);
mem(Stw, 0, RA2, RA2); // nprop = !0
RETURN;
flushcon(0);
}
static void
macret(void)
{
Inst i;
ulong *cp1, *cp2, *cp3, *cp4, *cp5, *linterp;
CMPI(AL, RA1, 0, 0, 0);
cp1 = code;
BRA(EQ, 0); // t(Rfp) == 0
mem(Ldw, O(Type,destroy),RA1, RA0);
CMPI(AL, RA0, 0, 0, 0);
cp2 = code;
BRA(EQ, 0); // destroy(t(fp)) == 0
mem(Ldw, O(Frame,fp),RFP, RA2);
CMPI(AL, RA2, 0, 0, 0);
cp3 = code;
BRA(EQ, 0); // fp(Rfp) == 0
mem(Ldw, O(Frame,mr),RFP, RA3);
CMPI(AL, RA3, 0, 0, 0);
cp4 = code;
BRA(EQ, 0); // mr(Rfp) == 0
mem(Ldw, O(REG,M),RREG, RA2);
mem(Ldw, O(Heap,ref)-sizeof(Heap),RA2, RA3);
DPI(AL, Sub, RA3, RA3, 0, 1) | SBIT;
cp5 = code;
BRA(EQ, 0); // --ref(arg) == 0
mem(Stw, O(Heap,ref)-sizeof(Heap),RA2, RA3);
mem(Ldw, O(Frame,mr),RFP, RA1);
mem(Stw, O(REG,M),RREG, RA1);
mem(Ldw, O(Modlink,MP),RA1, RMP);
mem(Stw, O(REG,MP),RREG, RMP);
mem(Ldw, O(Modlink,compiled), RA1, RA3); // R.M->compiled
CMPI(AL, RA3, 0, 0, 0);
linterp = code;
BRA(EQ, 0);
PATCH(cp4);
MOV(R15, R14); // call destroy(t(fp))
MOV(RA0, R15);
mem(Stw, O(REG,SP),RREG, RFP);
mem(Ldw, O(Frame,lr),RFP, RA1);
mem(Ldw, O(Frame,fp),RFP, RFP);
mem(Stw, O(REG,FP),RREG, RFP); // R.FP = RFP
DP(AL, Mov, 0, R15, 0, RA1); // goto lr(Rfp), if compiled
PATCH(linterp);
MOV(R15, R14); // call destroy(t(fp))
MOV(RA0, R15);
mem(Stw, O(REG,SP),RREG, RFP);
mem(Ldw, O(Frame,lr),RFP, RA1);
mem(Ldw, O(Frame,fp),RFP, RFP);
mem(Stw, O(REG,PC),RREG, RA1); // R.PC = fp->lr
mem(Stw, O(REG,FP),RREG, RFP); // R.FP = RFP
mem(Ldw, O(REG, xpc), RREG, RLINK);
RETURN; // return to xec uncompiled code
PATCH(cp1);
PATCH(cp2);
PATCH(cp3);
PATCH(cp5);
i.add = AXNON;
punt(&i, TCHECK|NEWPC, optab[IRET]);
}
static void
macmcal(void)
{
ulong *lab;
CMPH(AL, RA0);
memc(NE, Ldw, O(Modlink, prog), RA3, RA1); // RA0 != H
CMPI(NE, RA1, 0, 0, 0); // RA0 != H
lab = code;
BRA(NE, 0); // RA0 != H && m->prog!=0
mem(Stw, O(REG, st), RREG, RLINK);
mem(Stw, O(REG, FP), RREG, RA2);
mem(Stw, O(REG, dt), RREG, RA0);
CALL(rmcall); // CALL rmcall
con((ulong)&R, RREG, 1); // MOVL $R, RREG
mem(Ldw, O(REG, st), RREG, RLINK);
mem(Ldw, O(REG, FP), RREG, RFP);
mem(Ldw, O(REG, MP), RREG, RMP);
RETURN;
PATCH(lab); // patch:
DP(AL, Mov, 0, RFP, 0, RA2);
mem(Stw, O(REG, M), RREG, RA3); // MOVL RA3, R.M
mem(Ldw, O(Heap, ref)-sizeof(Heap), RA3, RA1);
DPI(AL, Add, RA1, RA1, 0, 1);
mem(Stw, O(Heap, ref)-sizeof(Heap), RA3, RA1);
mem(Ldw, O(Modlink, MP), RA3, RMP); // MOVL R.M->mp, RMP
mem(Stw, O(REG, MP), RREG, RMP); // MOVL RA3, R.MP R.MP = ml->m
mem(Ldw, O(Modlink,compiled), RA3, RA1); // M.compiled?
CMPI(AL, RA1, 0, 0, 0);
DP(NE, Mov, 0, R15, 0, RA0); // return to compiled code
mem(Stw, O(REG,FP),RREG, RFP); // R.FP = RFP
mem(Stw, O(REG,PC),RREG, RA0); // R.PC = RPC
mem(Ldw, O(REG, xpc), RREG, RLINK);
RETURN; // return to xec uncompiled code
flushcon(0);
}
static void
macfram(void)
{
ulong *lab1;
mem(Ldw, O(REG, SP), RREG, RA0); // MOVL R.SP, RA0
mem(Ldw, O(Type, size), RA3, RA1);
DP(AL, Add, RA0, RA0, 0, RA1); // nsp = R.SP + t->size
mem(Ldw, O(REG, TS), RREG, RA1);
CMP(AL, RA0, 0, 0, RA1); // nsp :: R.TS
lab1 = code;
BRA(CS, 0); // nsp >= R.TS; must expand
mem(Ldw, O(REG, SP), RREG, RA2); // MOVL R.SP, RA2
mem(Stw, O(REG, SP), RREG, RA0); // MOVL RA0, R.SP
mem(Stw, O(Frame, t), RA2, RA3); // MOVL RA3, t(RA2) f->t = t
con(0, RA0, 1);
mem(Stw, O(Frame,mr), RA2, RA0); // MOVL $0, mr(RA2) f->mr
mem(Ldw, O(Type, initialize), RA3, R15); // become t->init(RA2), returning RA2
PATCH(lab1);
mem(Stw, O(REG, s), RREG, RA3);
mem(Stw, O(REG, st), RREG, RLINK);
mem(Stw, O(REG, FP), RREG, RFP); // MOVL RFP, R.FP
CALL(extend); // CALL extend
con((ulong)&R, RREG, 1);
mem(Ldw, O(REG, st), RREG, RLINK);
mem(Ldw, O(REG, FP), RREG, RFP); // MOVL R.FP, RFP
mem(Ldw, O(REG, s), RREG, RA2); // MOVL R.s, *R.d
mem(Ldw, O(REG, MP), RREG, RMP); // MOVL R.MP, RMP
RETURN; // RET
}
static void
macmfra(void)
{
mem(Stw, O(REG, st), RREG, RLINK);
mem(Stw, O(REG, s), RREG, RA3); // Save type
mem(Stw, O(REG, d), RREG, RA0); // Save destination
mem(Stw, O(REG, FP), RREG, RFP);
CALL(rmfram); // CALL rmfram
con((ulong)&R, RREG, 1);
mem(Ldw, O(REG, st), RREG, RLINK);
mem(Ldw, O(REG, FP), RREG, RFP);
mem(Ldw, O(REG, MP), RREG, RMP);
RETURN;
}
static void
macrelq(void)
{
mem(Stw, O(REG,FP),RREG, RFP); // R.FP = RFP
mem(Stw, O(REG,PC),RREG, RLINK); // R.PC = RLINK
mem(Ldw, O(REG, xpc), RREG, RLINK);
RETURN;
}
void
comd(Type *t)
{
int i, j, m, c;
mem(Stw, O(REG, dt), RREG, RLINK);
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(Ldw, j, RFP, RA0);
CALL(base+macro[MacFRP]);
}
j += sizeof(WORD*);
}
flushchk();
}
mem(Ldw, O(REG, dt), RREG, RLINK);
RETURN;
flushcon(0);
}
void
comi(Type *t)
{
int i, j, m, c;
con((ulong)H, RA0, 1);
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(Stw, j, RA2, RA0);
j += sizeof(WORD*);
}
flushchk();
}
RETURN;
flushcon(0);
}
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= %.8p %4d i %.8p d %.8p asm=%d\n",
t, t->size, t->initialize, 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), 0);
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++) {
codeoff = n;
code = tmp;
comp(&m->prog[i]);
patch[i] = n;
n += code - tmp;
}
for(i = 0; i < nelem(mactab); i++) {
codeoff = n;
code = tmp;
mactab[i].gen();
macro[mactab[i].idx] = n;
n += code - tmp;
}
code = tmp;
flushcon(0);
n += code - tmp;
base = mallocz((n+nlit)*sizeof(*code), 0);
if(base == nil)
goto bad;
if(cflag > 3)
print("dis=%5d %5d 386=%5d asm=%.8p: %s\n",
size, size*sizeof(Inst), n, base, m->name);
pass++;
nlit = 0;
litpool = base+n;
code = base;
n = 0;
codeoff = 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]);
print("%lud != %d\n", patch[i], n);
urk("phase error");
}
n += code - s;
if(cflag > 4) {
print("%3d %D\n", i, &m->prog[i]);
das(s, code-s);
}
}
for(i = 0; i < nelem(mactab); i++) {
s = code;
mactab[i].gen();
if(macro[mactab[i].idx] != n){
print("mac phase err: %lud != %d\n", macro[mactab[i].idx], n);
urk("phase error");
}
n += code - s;
if(cflag > 4) {
print("%s:\n", mactab[i].name);
das(s, code-s);
}
}
s = code;
flushcon(0);
n += code - s;
for(l = m->ext; l->name; l++) {
l->u.pc = (Inst*)RELPC(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*)RELPC(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*)RELPC(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;
}