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ls9-vm.nw
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Abstract machine
<<ls9 definitions>>=
enum { OP_ILL, OP_APPLIS, OP_APPLIST, OP_APPLY, OP_TAILAPP, OP_QUOTE,
OP_ARG, OP_REF, OP_PUSH, OP_PUSHTRUE, OP_PUSHVAL, OP_POP,
OP_DROP, OP_JMP, OP_BRF, OP_BRT, OP_HALT, OP_CATCHSTAR,
OP_THROWSTAR, OP_CLOSURE, OP_MKENV, OP_PROPENV, OP_CPREF,
OP_CPARG, OP_ENTER, OP_ENTCOL, OP_RETURN, OP_SETARG, OP_SETREF,
OP_MACRO,
OP_ABS, OP_ALPHAC, OP_ATOM, OP_BITOP, OP_CAAR, OP_CADR, OP_CAR,
OP_CDAR, OP_CDDR, OP_CDR, OP_CEQUAL, OP_CGRTR, OP_CGTEQ,
OP_CHAR, OP_CHARP, OP_CHARVAL, OP_CLESS, OP_CLOSE_PORT,
OP_CLTEQ, OP_CMDLINE, OP_CONC, OP_CONS, OP_CONSTP, OP_CTAGP,
OP_DELETE, OP_DIV, OP_DOWNCASE, OP_DUMP_IMAGE, OP_EOFP, OP_EQ,
OP_EQUAL, OP_ERROR, OP_ERROR2, OP_ERRPORT, OP_EVAL, OP_EXISTSP,
OP_FIXP, OP_FLUSH, OP_FORMAT, OP_FUNP, OP_GC, OP_GENSYM,
OP_GRTR, OP_GTEQ, OP_INPORT, OP_INPORTP, OP_LESS, OP_LISTSTR,
OP_LISTVEC, OP_LOAD, OP_LOWERC, OP_LTEQ, OP_MAX, OP_MIN,
OP_MINUS, OP_MKSTR, OP_MKVEC, OP_MX, OP_MX1, OP_NCONC,
OP_NEGATE, OP_NRECONC, OP_NULL, OP_NUMERIC, OP_NUMSTR,
OP_OBTAB, OP_OPEN_INFILE, OP_OPEN_OUTFILE, OP_OUTPORT,
OP_OUTPORTP, OP_PAIR, OP_PEEKC, OP_PLUS, OP_PRIN, OP_PRINC,
OP_QUIT, OP_READ, OP_READC, OP_RECONC, OP_REM, OP_RENAME,
OP_SCONC, OP_SEQUAL, OP_SETCAR, OP_SETCDR, OP_SET_INPORT,
OP_SET_OUTPORT, OP_SFILL, OP_SGRTR, OP_SGTEQ, OP_SIEQUAL,
OP_SIGRTR, OP_SIGTEQ, OP_SILESS, OP_SILTEQ, OP_SLESS, OP_SLTEQ,
OP_SREF, OP_SSET, OP_SSIZE, OP_STRINGP, OP_STRLIST, OP_STRNUM,
OP_SUBSTR, OP_SUBVEC, OP_SYMBOL, OP_SYMBOLP, OP_SYMNAME,
OP_SYMTAB, OP_SYSCMD, OP_TIMES, OP_UNTAG, OP_UPCASE, OP_UPPERC,
OP_VCONC, OP_VECLIST, OP_VECTORP, OP_VFILL, OP_VREF, OP_VSET,
OP_VSIZE, OP_WHITEC, OP_WRITEC };
@
<<ls9 macros>>=
#define ins() (string(cdr(Prog))[Ip])
#define op1() fetcharg(string(cdr(Prog)), Ip+1)
#define op2() fetcharg(string(cdr(Prog)), Ip+3)
#define skip(n) (Ip += (n))
#define clear(n) (Sp -= (n))
#define box(x) cons((x), NIL)
#define boxref(x) car(x)
#define boxset(x,v) (car(x) = (v))
#define stackref(n) (vector(Rts)[n])
#define stackset(n,v) (vector(Rts)[n] = (v))
#define envbox(n) (vector(Ep)[n])
#define argbox(n) (stackref(Fp-(n)))
#define argref(n) boxref(argbox(n))
#define arg(n) boxref(stackref(Sp-(n)))
#define closure_ip(c) cadr(c)
#define closure_env(c) caddr(c)
#define closure_prog(c) cadddr(c)
#define whitespc(c) \
(' ' == (c) || \
'\t' == (c) || \
'\n' == (c) || \
'\r' == (c) || \
'\f' == (c))
@
<<ls9 globals>>=
char *op_names[] = {
"OP_ILL", "OP_APPLIS", "OP_APPLIST", "OP_APPLY", "OP_TAILAPP", "OP_QUOTE",
"OP_ARG", "OP_REF", "OP_PUSH", "OP_PUSHTRUE", "OP_PUSHVAL", "OP_POP",
"OP_DROP", "OP_JMP", "OP_BRF", "OP_BRT", "OP_HALT", "OP_CATCHSTAR",
"OP_THROWSTAR", "OP_CLOSURE", "OP_MKENV", "OP_PROPENV", "OP_CPREF",
"OP_CPARG", "OP_ENTER", "OP_ENTCOL", "OP_RETURN", "OP_SETARG", "OP_SETREF",
"OP_MACRO",
"OP_ABS", "OP_ALPHAC", "OP_ATOM", "OP_BITOP", "OP_CAAR", "OP_CADR", "OP_CAR",
"OP_CDAR", "OP_CDDR", "OP_CDR", "OP_CEQUAL", "OP_CGRTR", "OP_CGTEQ",
"OP_CHAR", "OP_CHARP", "OP_CHARVAL", "OP_CLESS", "OP_CLOSE_PORT",
"OP_CLTEQ", "OP_CMDLINE", "OP_CONC", "OP_CONS", "OP_CONSTP", "OP_CTAGP",
"OP_DELETE", "OP_DIV", "OP_DOWNCASE", "OP_DUMP_IMAGE", "OP_EOFP", "OP_EQ",
"OP_EQUAL", "OP_ERROR", "OP_ERROR2", "OP_ERRPORT", "OP_EVAL", "OP_EXISTSP",
"OP_FIXP", "OP_FLUSH", "OP_FORMAT", "OP_FUNP", "OP_GC", "OP_GENSYM",
"OP_GRTR", "OP_GTEQ", "OP_INPORT", "OP_INPORTP", "OP_LESS", "OP_LISTSTR",
"OP_LISTVEC", "OP_LOAD", "OP_LOWERC", "OP_LTEQ", "OP_MAX", "OP_MIN",
"OP_MINUS", "OP_MKSTR", "OP_MKVEC", "OP_MX", "OP_MX1", "OP_NCONC",
"OP_NEGATE", "OP_NRECONC", "OP_NULL", "OP_NUMERIC", "OP_NUMSTR",
"OP_OBTAB", "OP_OPEN_INFILE", "OP_OPEN_OUTFILE", "OP_OUTPORT",
"OP_OUTPORTP", "OP_PAIR", "OP_PEEKC", "OP_PLUS", "OP_PRIN", "OP_PRINC",
"OP_QUIT", "OP_READ", "OP_READC", "OP_RECONC", "OP_REM", "OP_RENAME",
"OP_SCONC", "OP_SEQUAL", "OP_SETCAR", "OP_SETCDR", "OP_SET_INPORT",
"OP_SET_OUTPORT", "OP_SFILL", "OP_SGRTR", "OP_SGTEQ", "OP_SIEQUAL",
"OP_SIGRTR", "OP_SIGTEQ", "OP_SILESS", "OP_SILTEQ", "OP_SLESS", "OP_SLTEQ",
"OP_SREF", "OP_SSET", "OP_SSIZE", "OP_STRINGP", "OP_STRLIST", "OP_STRNUM",
"OP_SUBSTR", "OP_SUBVEC", "OP_SYMBOL", "OP_SYMBOLP", "OP_SYMNAME",
"OP_SYMTAB", "OP_SYSCMD", "OP_TIMES", "OP_UNTAG", "OP_UPCASE", "OP_UPPERC",
"OP_VCONC", "OP_VECLIST", "OP_VECTORP", "OP_VFILL", "OP_VREF", "OP_VSET",
"OP_VSIZE", "OP_WHITEC", "OP_WRITEC" };
full Prog = NIL;
full Ip = 0;
full Acc = NIL;
full Sz = CHUNKSIZE;
full Rts = NIL,
Sp = NIL,
Fp = NIL;
full E0 = NIL,
Ep = NIL;
volatile full Run = 0;
full Argv;
@
<<ls9 init>>=
P_abs = symref("abs");
P_alphac = symref("alphac");
P_atom = symref("atom");
P_caar = symref("caar");
P_cadr = symref("cadr");
P_car = symref("car");
P_catchstar = symref("catch*");
P_cdar = symref("cdar");
P_cddr = symref("cddr");
P_cdr = symref("cdr");
P_cequal = symref("c=");
P_cgrtr = symref("c>");
P_cgteq = symref("c>=");
P_char = symref("char");
P_charp = symref("charp");
P_charval = symref("charval");
P_cless = symref("c<");
P_close_port = symref("close-port");
P_clteq = symref("c<=");
P_cmdline = symref("cmdline");
P_conc = symref("conc");
P_cons = symref("cons");
P_constp = symref("constp");
P_ctagp = symref("ctagp");
P_delete = symref("delete");
P_downcase = symref("downcase");
P_dump_image = symref("dump-image");
P_eofp = symref("eofp");
P_eq = symref("eq");
P_error = symref("error");
P_errport = symref("errport");
P_eval = symref("eval");
P_existsp = symref("existsp");
P_fixp = symref("fixp");
P_flush = symref("flush");
P_format = symref("format");
P_funp = symref("funp");
P_gc = symref("gc");
P_gensym = symref("gensym");
P_inport = symref("inport");
P_inportp = symref("inportp");
P_liststr = symref("liststr");
P_listvec = symref("listvec");
P_load = symref("load");
P_lowerc = symref("lowerc");
P_max = symref("max");
P_min = symref("min");
P_mkstr = symref("mkstr");
P_mkvec = symref("mkvec");
P_mx = symref("mx");
P_mx1 = symref("mx1");
P_not = symref("not");
P_nconc = symref("nconc");
P_nreconc = symref("nreconc");
P_null = symref("null");
P_numeric = symref("numeric");
P_numstr = symref("numstr");
P_obtab = symref("obtab");
P_open_infile = symref("open-infile");
P_open_outfile = symref("open-outfile");
P_outport = symref("outport");
P_outportp = symref("outportp");
P_pair = symref("pair");
P_peekc = symref("peekc");
P_prin = symref("prin");
P_princ = symref("princ");
P_quit = symref("quit");
P_read = symref("read");
P_readc = symref("readc");
P_reconc = symref("reconc");
P_rename = symref("rename");
P_sconc = symref("sconc");
P_sequal = symref("s=");
P_set_inport = symref("set-inport");
P_set_outport = symref("set-outport");
P_setcar = symref("setcar");
P_setcdr = symref("setcdr");
P_sfill = symref("sfill");
P_sgrtr = symref("s>");
P_sgteq = symref("s>=");
P_siequal = symref("si=");
P_sigrtr = symref("si>");
P_sigteq = symref("si>=");
P_siless = symref("si<");
P_silteq = symref("si<=");
P_sless = symref("s<");
P_slteq = symref("s<=");
P_sref = symref("sref");
P_sset = symref("sset");
P_ssize = symref("ssize");
P_stringp = symref("stringp");
P_strlist = symref("strlist");
P_strnum = symref("strnum");
P_substr = symref("substr");
P_subvec = symref("subvec");
P_symbol = symref("symbol");
P_symbolp = symref("symbolp");
P_symname = symref("symname");
P_symtab = symref("symtab");
P_syscmd = symref("syscmd");
P_throwstar = symref("throw*");
P_untag = symref("untag");
P_upcase = symref("upcase");
P_upperc = symref("upperc");
P_vconc = symref("vconc");
P_veclist = symref("veclist");
P_vectorp = symref("vectorp");
P_vfill = symref("vfill");
P_vref = symref("vref");
P_vset = symref("vset");
P_vsize = symref("vsize");
P_whitec = symref("whitec");
P_writec = symref("writec");
@
<<ls9 impl>>=
void run(full x) {
byte opcode;
Acc = NIL;
Prog = x;
Ip = 0;
if (setjmp(Errtag) != 0)
Ip = throwerr(Handler);
for (Run=1; Run;) {
opcode = ins();
switch (opcode) {
case OP_APPLIS:
Ip = applis(0);
break;
case OP_APPLIST:
Ip = applis(1);
break;
case OP_TAILAPP:
Ip = apply(1);
break;
case OP_APPLY:
Ip = apply(0);
break;
case OP_QUOTE:
Acc = vector(Obarray)[op1()];
skip(ISIZE1);
break;
case OP_ARG:
Acc = argref(op1());
skip(ISIZE1);
break;
case OP_REF:
Acc = boxref(envbox(op1()));
if (UNDEF == Acc)
error("undefined symbol", vector(Symbols)[op2()]);
if (Tp >= NTRACE) Tp = 0;
Trace[Tp++] = op2();
skip(ISIZE2);
break;
case OP_DROP:
Sp--;
skip(ISIZE0);
break;
case OP_POP:
Acc = stackref(Sp);
Sp--;
skip(ISIZE0);
break;
case OP_PUSH:
push(cons(Acc, NIL));
skip(ISIZE0);
break;
case OP_PUSHTRUE:
push(TRUE);
skip(ISIZE0);
break;
case OP_PUSHVAL:
push(mkfix(op1()));
skip(ISIZE1);
break;
case OP_JMP:
Ip = op1();
break;
case OP_BRF:
if (NIL == Acc)
Ip = op1();
else
skip(ISIZE1);
break;
case OP_BRT:
if (NIL == Acc)
skip(ISIZE1);
else
Ip = op1();
break;
case OP_HALT:
return;
case OP_CATCHSTAR:
push(box(mkctag()));
push(mkfix(1));
skip(ISIZE0);
break;
case OP_THROWSTAR:
Ip = throw(Acc, arg(0));
break;
case OP_MKENV:
Acc = mkvec(op1());
skip(ISIZE1);
break;
case OP_PROPENV:
Acc = Ep;
skip(ISIZE0);
break;
case OP_CPARG:
vector(Acc)[op2()] = argbox(op1());
skip(ISIZE2);
break;
case OP_CPREF:
vector(Acc)[op2()] = envbox(op1());
skip(ISIZE2);
break;
case OP_CLOSURE:
Acc = closure(op1(), Acc);
skip(ISIZE1);
break;
case OP_ENTER:
if (fixval(stackref(Sp-2)) != op1())
error("wrong number of arguments", UNDEF);
push(mkfix(Fp));
Fp = Sp-4;
skip(ISIZE1);
break;
case OP_ENTCOL:
entcol(op1());
skip(ISIZE1);
break;
case OP_RETURN:
Ip = ret();
break;
case OP_SETARG:
boxset(argbox(op1()), Acc);
skip(ISIZE1);
break;
case OP_SETREF:
boxset(envbox(op1()), Acc);
skip(ISIZE1);
break;
case OP_MACRO:
newmacro(op1(), Acc);
skip(ISIZE1);
break;
case OP_CMDLINE:
Acc = Argv;
skip(ISIZE0);
break;
case OP_QUIT:
exit(EXIT_SUCCESS);
skip(ISIZE0);
break;
case OP_OBTAB:
Acc = Obarray;
skip(ISIZE0);
break;
case OP_SYMTAB:
Acc = Symbols;
skip(ISIZE0);
break;
case OP_ERROR:
if (!stringp(Acc)) expect("error", "string", Acc);
error((char *) string(Acc), UNDEF);
skip(ISIZE0);
break;
case OP_ERROR2:
if (!stringp(Acc)) expect("error", "string", Acc);
error((char *) string(Acc), arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_ERRPORT:
Acc = mkport(Errport, T_OUTPORT);
skip(ISIZE0);
break;
case OP_INPORT:
Acc = mkport(Inport, T_INPORT);
skip(ISIZE0);
break;
case OP_OUTPORT:
Acc = mkport(Outport, T_OUTPORT);
skip(ISIZE0);
break;
case OP_GC:
Acc = b_gc();
skip(ISIZE0);
break;
case OP_GENSYM:
Acc = gensym();
skip(ISIZE0);
break;
case OP_ABS:
if (!fixp(Acc)) expect("abs", "fixnum", Acc);
if (IFULL_MIN == (ifull)fixval(Acc)) {
error("abs: fixnum overflow", Acc);
}
if ((ifull)fixval(Acc) < 0) Acc = mkifix(-(ifull)fixval(Acc));
skip(ISIZE0);
break;
case OP_ALPHAC:
if (!charp(Acc)) expect("alphac", "char", Acc);
Acc = isalpha((int)charval(Acc))? TRUE: NIL;
skip(ISIZE0);
break;
case OP_ATOM:
Acc = pairp(Acc)? NIL: TRUE;
skip(ISIZE0);
break;
case OP_CAR:
if (!pairp(Acc)) expect("car", "pair", Acc);
Acc = car(Acc);
skip(ISIZE0);
break;
case OP_CDR:
if (!pairp(Acc)) expect("cdr", "pair", Acc);
Acc = cdr(Acc);
skip(ISIZE0);
break;
case OP_CAAR:
if (!pairp(Acc) || !pairp(car(Acc)))
expect("caar", "nested pair", Acc);
Acc = caar(Acc);
skip(ISIZE0);
break;
case OP_CADR:
if (!pairp(Acc) || !pairp(cdr(Acc)))
expect("cadr", "nested pair", Acc);
Acc = cadr(Acc);
skip(ISIZE0);
break;
case OP_CDAR:
if (!pairp(Acc) || !pairp(car(Acc)))
expect("cdar", "nested pair", Acc);
Acc = cdar(Acc);
skip(ISIZE0);
break;
case OP_CDDR:
if (!pairp(Acc) || !pairp(cdr(Acc)))
expect("cddr", "nested pair", Acc);
Acc = cddr(Acc);
skip(ISIZE0);
break;
case OP_CHAR:
if (!fixp(Acc)) expect("char", "fixnum", Acc);
if (fixval(Acc) > 255)
error("char: value out of range", Acc);
Acc = mkchar(fixval(Acc));
skip(ISIZE0);
break;
case OP_CHARP:
Acc = charp(Acc)? TRUE: NIL;
skip(ISIZE0);
break;
case OP_CHARVAL:
if (!charp(Acc)) expect("charval", "char", Acc);
Acc = mkfix(charval(Acc));
skip(ISIZE0);
break;
case OP_CLOSE_PORT:
if (!inportp(Acc) && !outportp(Acc))
expect("close-port", "port", Acc);
close_port(portno(Acc));
Acc = NIL;
skip(ISIZE0);
break;
case OP_CONSTP:
Acc = constp(Acc)? TRUE: NIL;
skip(ISIZE0);
break;
case OP_CTAGP:
Acc = ctagp(Acc)? TRUE: NIL;
skip(ISIZE0);
break;
case OP_DELETE:
if (!stringp(Acc)) expect("delete", "string", Acc);
if (remove((char *) string(Acc)) < 0)
error("delete: cannot delete", Acc);
Acc = NIL;
skip(ISIZE0);
break;
case OP_DOWNCASE:
if (!charp(Acc)) expect("downcase", "char", Acc);
Acc = mkchar(tolower((int)charval(Acc)));
skip(ISIZE0);
break;
case OP_DUMP_IMAGE:
if (!stringp(Acc)) expect("dump-image", "string", Acc);
dump_image(Acc);
Acc = TRUE;
skip(ISIZE0);
break;
case OP_EOFP:
Acc = (EOFMARK == Acc? TRUE: NIL);
skip(ISIZE0);
break;
case OP_EVAL:
Acc = eval(Acc, 1);
skip(ISIZE0);
break;
case OP_EXISTSP:
if (!stringp(Acc)) expect("existsp", "string", Acc);
Acc = existsp((char *) string(Acc));
skip(ISIZE0);
break;
case OP_FIXP:
Acc = fixp(Acc)? TRUE: NIL;
skip(ISIZE0);
break;
case OP_FLUSH:
if (!outportp(Acc)) expect("flush", "outport", Acc);
fflush(Ports[portno(Acc)]);
skip(ISIZE0);
break;
case OP_FORMAT:
Acc = format(Acc);
skip(ISIZE0);
break;
case OP_FUNP:
Acc = closurep(Acc)? TRUE: NIL;
skip(ISIZE0);
break;
case OP_INPORTP:
Acc = inportp(Acc)? TRUE: NIL;
skip(ISIZE0);
break;
case OP_LISTSTR:
if (!listp(Acc)) expect("liststr", "list", Acc);
Acc = liststr(Acc);
skip(ISIZE0);
break;
case OP_LISTVEC:
if (!listp(Acc)) expect("listvec", "list", Acc);
Acc = listvec(Acc, 0);
skip(ISIZE0);
break;
case OP_LOAD:
load(Acc);
Acc = TRUE;
skip(ISIZE0);
break;
case OP_LOWERC:
if (!charp(Acc)) expect("lowerc", "char", Acc);
Acc = islower((int)charval(Acc))? TRUE: NIL;
skip(ISIZE0);
break;
case OP_MX:
Acc = expand(Acc, 1);
skip(ISIZE0);
break;
case OP_MX1:
Acc = expand(Acc, 0);
skip(ISIZE0);
break;
case OP_NEGATE:
if (!fixp(Acc)) expect("-", "fixnum", Acc);
if (IFULL_MIN == (ifull)fixval(Acc)) {
error("-: fixnum overflow", Acc);
}
Acc = mkifix(-(ifull)fixval(Acc));
skip(ISIZE0);
break;
case OP_NULL:
Acc = (NIL == Acc? TRUE: NIL);
skip(ISIZE0);
break;
case OP_NUMSTR:
if (!fixp(Acc)) expect("numstr", "fixnum", Acc);
if (!fixp(arg(0))) expect("numstr", "fixnum", arg(0));
Acc = numstr(Acc, fixval(arg(0)));
clear(1);
skip(ISIZE0);
break;
case OP_NUMERIC:
if (!charp(Acc)) expect("numeric", "char", Acc);
Acc = isdigit((int)charval(Acc))? TRUE: NIL;
skip(ISIZE0);
break;
case OP_OPEN_INFILE:
if (!stringp(Acc)) expect("open-infile", "string", Acc);
Acc = openfile(Acc, 0);
skip(ISIZE0);
break;
case OP_OPEN_OUTFILE:
if (!stringp(Acc)) expect("open-outfile", "string", Acc);
Acc = openfile(Acc, NIL == arg(0)? 1: 2);
clear(1);
skip(ISIZE0);
break;
case OP_OUTPORTP:
Acc = outportp(Acc)? TRUE: NIL;
skip(ISIZE0);
break;
case OP_PAIR:
Acc = pairp(Acc)? TRUE: NIL;
skip(ISIZE0);
break;
case OP_PEEKC:
if (!inportp(Acc)) expect("peekc", "inport", Acc);
Acc = b_readc(portno(Acc), 1);
skip(ISIZE0);
break;
case OP_READ:
if (!inportp(Acc) && !stringp(Acc))
expect("read", "inport", Acc);
Acc = b_read(Acc);
skip(ISIZE0);
break;
case OP_READC:
if (!inportp(Acc)) expect("readc", "inport", Acc);
Acc = b_readc(portno(Acc), 0);
skip(ISIZE0);
break;
case OP_CONC:
Acc = lconc(Acc);
skip(ISIZE0);
break;
case OP_NCONC:
Acc = nlconc(Acc);
skip(ISIZE0);
break;
case OP_SCONC:
Acc = sconc(Acc);
skip(ISIZE0);
break;
case OP_SET_INPORT:
if (!inportp(Acc)) expect("set-inport", "inport", Acc);
Inport = portno(Acc);
skip(ISIZE0);
break;
case OP_SET_OUTPORT:
if (!outportp(Acc)) expect("set-outport", "outport", Acc);
Outport = portno(Acc);
skip(ISIZE0);
break;
case OP_SSIZE:
if (!stringp(Acc)) expect("ssize", "string", Acc);
Acc = mkfix(stringlen(Acc)-1);
skip(ISIZE0);
break;
case OP_STRNUM:
if (!stringp(Acc)) expect("strnum", "string", Acc);
if (!fixp(arg(0))) expect("strnum", "fixnum", arg(0));
Acc = strnum((char *) string(Acc), fixval(arg(0)));
clear(1);
skip(ISIZE0);
break;
case OP_SYMBOLP:
Acc = symbolp(Acc)? TRUE: NIL;
skip(ISIZE0);
break;
case OP_SYMBOL:
if (!stringp(Acc)) expect("symbol", "string", Acc);
Acc = b_symbol(Acc);
skip(ISIZE0);
break;
case OP_SYMNAME:
if (!symbolp(Acc)) expect("symname", "symbol", Acc);
Acc = b_symname(Acc);
skip(ISIZE0);
break;
case OP_STRINGP:
Acc = stringp(Acc)? TRUE: NIL;
skip(ISIZE0);
break;
case OP_STRLIST:
if (!stringp(Acc)) expect("strlist", "string", Acc);
Acc = strlist(Acc);
skip(ISIZE0);
break;
case OP_SYSCMD:
if (!stringp(Acc)) expect("syscmd", "string", Acc);
Acc = mkfix((full)(system((char *) string(Acc)) @>> 8));
skip(ISIZE0);
break;
case OP_UNTAG:
Acc = untag(Acc);
skip(ISIZE0);
break;
case OP_UPCASE:
if (!charp(Acc)) expect("upcase", "char", Acc);
/* CAST */
Acc = mkchar(toupper((int)charval(Acc)));
skip(ISIZE0);
break;
case OP_UPPERC:
if (!charp(Acc)) expect("upperc", "char", Acc);
Acc = isupper((int)charval(Acc))? TRUE: NIL;
skip(ISIZE0);
break;
case OP_VCONC:
Acc = vconc(Acc);
skip(ISIZE0);
break;
case OP_VECLIST:
if (!vectorp(Acc)) expect("veclist", "vector", Acc);
Acc = veclist(Acc);
skip(ISIZE0);
break;
case OP_VECTORP:
Acc = vectorp(Acc)? TRUE: NIL;
skip(ISIZE0);
break;
case OP_VSIZE:
if (!vectorp(Acc)) expect("vsize", "vector", Acc);
Acc = mkfix(veclen(Acc));
skip(ISIZE0);
break;
case OP_WHITEC:
if (!charp(Acc)) expect("whitec", "char", Acc);
Acc = whitespc(charval(Acc))? TRUE: NIL;
skip(ISIZE0);
break;
case OP_BITOP:
Acc = bitop(Acc, arg(0), arg(1));
clear(1);
skip(ISIZE0);
break;
case OP_CLESS:
cless(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_CLTEQ:
clteq(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_CEQUAL:
cequal(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_CGRTR:
cgrtr(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_CGTEQ:
cgteq(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_CONS:
Acc = cons(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_DIV:
Acc = intdiv(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_EQ:
Acc = (Acc == arg(0))? TRUE: NIL;
clear(1);
skip(ISIZE0);
break;
case OP_EQUAL:
equal(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_GRTR:
grtr(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_GTEQ:
gteq(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_LESS:
less(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_LTEQ:
lteq(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_MAX:
if ((ifull)fixval(arg(0)) > (ifull)fixval(Acc)) Acc = arg(0);
clear(1);
skip(ISIZE0);
break;
case OP_MIN:
if ((ifull)fixval(arg(0)) < (ifull)fixval(Acc)) Acc = arg(0);
clear(1);
skip(ISIZE0);
break;
case OP_MINUS:
Acc = xsub(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_MKSTR:
Acc = b_mkstr(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_MKVEC:
Acc = b_mkvec(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_NRECONC:
if (!listp(Acc)) expect("nreconc", "list", Acc);
if (constp(Acc)) error("nreconc: immutable", Acc);
Acc = nreconc(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_PLUS:
Acc = add(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_PRIN:
if (!outportp(arg(0))) expect("prin", "outport", arg(0));
b_prin(Acc, portno(arg(0)), 1);
clear(1);
skip(ISIZE0);
break;
case OP_PRINC:
if (!outportp(arg(0))) expect("princ", "outport", arg(0));
b_prin(Acc, portno(arg(0)), 0);
clear(1);
skip(ISIZE0);
break;
case OP_RECONC:
if (!listp(Acc)) expect("reconc", "list", Acc);
Acc = reconc(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_REM:
Acc = intrem(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_RENAME:
b_rename(Acc, arg(0));
Acc = NIL;
clear(1);
skip(ISIZE0);
break;
case OP_SETCAR:
if (!pairp(Acc)) expect("setcar", "pair", Acc);
if (constp(Acc)) error("setcar: immutable", Acc);
car(Acc) = arg(0);
clear(1);
skip(ISIZE0);
break;
case OP_SETCDR:
if (!pairp(Acc)) expect("setcdr", "pair", Acc);
if (constp(Acc)) error("setcdr: immutable", Acc);
cdr(Acc) = arg(0);
clear(1);
skip(ISIZE0);
break;
case OP_SLESS:
Acc = sless(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SLTEQ:
Acc = slteq(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SEQUAL:
Acc = sequal(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SGRTR:
Acc = sgrtr(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SGTEQ:
Acc = sgteq(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SILESS:
Acc = siless(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SILTEQ:
Acc = silteq(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SIEQUAL:
Acc = siequal(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SIGRTR:
Acc = sigrtr(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SIGTEQ:
Acc = sigteq(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SFILL:
sfill(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SREF:
Acc = sref(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_SSET:
sset(Acc, arg(0), arg(1));
clear(2);
skip(ISIZE0);
break;
case OP_SUBSTR:
Acc = substr(Acc, arg(0), arg(1));
clear(2);
skip(ISIZE0);
break;
case OP_SUBVEC:
Acc = subvec(Acc, arg(0), arg(1));
clear(2);
skip(ISIZE0);
break;
case OP_TIMES:
Acc = mul(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_VFILL:
vfill(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_VREF:
Acc = vref(Acc, arg(0));
clear(1);
skip(ISIZE0);
break;
case OP_VSET:
vset(Acc, arg(0), arg(1));
clear(2);
skip(ISIZE0);
break;
case OP_WRITEC:
if (!charp(Acc)) expect("writec", "char", Acc);
if (!outportp(arg(0))) expect("writec", "outport", arg(0));
b_writec((int)charval(Acc), portno(arg(0)));
clear(1);
skip(ISIZE0);
break;
default:
error("illegal instruction", mkfix(ins()));
return;
} }
error("interrupted", UNDEF);
}
void stkalloc(full k) {
full i, n, *vs, *vn;
if (Sp + k >= Sz) {
/* allocate multiples of CHUNKSIZE */
if (k >= CHUNKSIZE) {