cleaning up implementation of apply() entry point
removing use of interpreter in computed calls to builtins
This commit is contained in:
JeffBezanson
parent
94814a2e34
commit
86b7738c89
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@ -9,7 +9,7 @@
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(define Instructions
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(make-enum-table
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[:nop :dup :pop :call :tcall :jmp :brf :brt :jmp.l :brf.l :brt.l :ret
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:tapply :for
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:tapply
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:eq? :eqv? :equal? :atom? :not :null? :boolean? :symbol?
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:number? :bound? :pair? :builtin? :vector? :fixnum?
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@ -25,7 +25,7 @@
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:loadg :loada :loadc :loadg.l
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:setg :seta :setc :setg.l
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:closure :trycatch :argc :vargc :close :let]))
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:closure :trycatch :argc :vargc :close :let :for]))
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(define arg-counts
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(table :eq? 2 :eqv? 2
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@ -55,7 +55,7 @@
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static char *builtin_names[] =
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{ // special forms
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"quote", "cond", "if", "and", "or", "while", "lambda",
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"trycatch", "%apply", "%applyn", "set!", "prog1", "for", "begin",
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"trycatch", "%apply", "set!", "prog1", "for", "begin",
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// predicates
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"eq?", "eqv?", "equal?", "atom?", "not", "null?", "boolean?", "symbol?",
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@ -74,6 +74,16 @@ static char *builtin_names[] =
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"vector", "aref", "aset!",
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"", "", "" };
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#define ANYARGS -10000
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static short builtin_arg_counts[] =
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{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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2, ANYARGS, 1, 1, 2, 2,
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1, 2,
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ANYARGS, -1, ANYARGS, -1, 2, 2, 2,
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ANYARGS, 2, 3 };
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#define N_STACK 262144
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value_t StaticStack[N_STACK];
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value_t *Stack = StaticStack;
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@ -467,7 +477,7 @@ static void trace_globals(symbol_t *root)
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}
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}
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static value_t special_apply_form, special_applyn_form;
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static value_t special_apply_form;
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static value_t apply1_args;
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static value_t memory_exception_value;
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@ -502,7 +512,6 @@ void gc(int mustgrow)
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}
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lasterror = relocate(lasterror);
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special_apply_form = relocate(special_apply_form);
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special_applyn_form = relocate(special_applyn_form);
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apply1_args = relocate(apply1_args);
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memory_exception_value = relocate(memory_exception_value);
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@ -541,22 +550,32 @@ void gc(int mustgrow)
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// utils ----------------------------------------------------------------------
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value_t apply(value_t f, value_t l)
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#define topeval(e, env) (selfevaluating(e) ? (e) : eval_sexpr((e),env,1,2))
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// apply function with n args on the stack
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static value_t _applyn(uint32_t n)
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{
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PUSH(f);
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PUSH(l);
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value_t v = toplevel_eval(special_apply_form);
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POPN(2);
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return v;
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PUSH(fixnum(n));
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return topeval(special_apply_form, NULL);
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}
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value_t apply1(value_t f, value_t a0)
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value_t apply(value_t f, value_t l)
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{
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value_t v = l;
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uint32_t n = SP;
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PUSH(f);
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PUSH(a0);
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PUSH(fixnum(1));
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value_t v = toplevel_eval(special_applyn_form);
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POPN(3);
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while (iscons(v)) {
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if (n == MAX_ARGS) {
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PUSH(v);
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break;
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}
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PUSH(car_(v));
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v = cdr_(v);
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}
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n = SP - n - 1;
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v = _applyn(n);
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POPN(n+1);
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return v;
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}
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@ -571,9 +590,8 @@ value_t applyn(uint32_t n, value_t f, ...)
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value_t a = va_arg(ap, value_t);
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PUSH(a);
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}
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PUSH(fixnum(n));
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value_t v = toplevel_eval(special_applyn_form);
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POPN(n+2);
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value_t v = _applyn(n);
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POPN(n+1);
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return v;
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}
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@ -682,7 +700,6 @@ static value_t list(value_t *args, uint32_t nargs)
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}
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#define eval(e) (selfevaluating(e) ? (e) : eval_sexpr((e),penv,0,envsz))
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#define topeval(e, env) (selfevaluating(e) ? (e) : eval_sexpr((e),env,1,2))
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#define tail_eval(xpr) do { \
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if (selfevaluating(xpr)) { SP=saveSP; return (xpr); } \
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else { e=(xpr); goto eval_top; } } while (0)
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@ -763,7 +780,7 @@ static value_t do_trycatch(value_t expr, value_t *penv, uint32_t envsz)
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else {
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v = car_(v);
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Stack[SP-1] = eval(v);
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v = apply1(Stack[SP-1], lasterror);
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v = applyn(1, Stack[SP-1], lasterror);
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}
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}
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return v;
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@ -1387,21 +1404,15 @@ static value_t eval_sexpr(value_t e, value_t *penv, int tail, uint32_t envsz)
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penv = &Stack[SP-2];
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}
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goto eval_top;
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case F_SPECIAL_APPLYN:
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POPN(4);
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case F_SPECIAL_APPLY:
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POPN(2);
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v = POP();
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saveSP = SP;
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nargs = numval(v);
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bp = SP-nargs-2;
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f = Stack[bp+1];
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penv = &Stack[bp+1];
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goto do_apply;
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case F_SPECIAL_APPLY:
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f = Stack[bp-4];
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v = Stack[bp-3];
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PUSH(f);
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PUSH(v);
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nargs = 2;
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// falls through!!
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case F_APPLY:
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argcount("apply", nargs, 2);
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v = Stack[SP-1]; // second arg is new arglist
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@ -1429,7 +1440,7 @@ static value_t eval_sexpr(value_t e, value_t *penv, int tail, uint32_t envsz)
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return v;
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}
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f = Stack[bp+1];
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assert(SP > bp+1);
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assert((signed)SP > (signed)bp+1);
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if (__likely(iscons(f))) {
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if (car_(f) == COMPILEDLAMBDA) {
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i = SP;
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@ -1535,10 +1546,10 @@ static value_t eval_sexpr(value_t e, value_t *penv, int tail, uint32_t envsz)
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*/
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static value_t apply_cl(uint32_t nargs)
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{
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uint32_t i, n, ip, bp, envsz, captured;
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uint32_t i, n, ip, bp, envsz, captured, op;
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fixnum_t s, lo, hi;
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int64_t accum;
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uint8_t op, *code;
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uint8_t *code;
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value_t func, v, bcode, x, e;
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value_t *pvals, *lenv, *pv;
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symbol_t *sym;
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@ -1615,12 +1626,31 @@ static value_t apply_cl(uint32_t nargs)
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s = SP;
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func = Stack[SP-i-1];
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if (isbuiltinish(func)) {
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if (uintval(func) > N_BUILTINS) {
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op = uintval(func);
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if (op > N_BUILTINS) {
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v = ((builtin_t)ptr(func))(&Stack[SP-i], i);
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}
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else {
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PUSH(fixnum(i));
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v = toplevel_eval(special_applyn_form);
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s = builtin_arg_counts[op];
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if (s >= 0)
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argcount(builtin_names[op], i, s);
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else if (s != ANYARGS && (signed)i < -s)
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argcount(builtin_names[op], i, -s);
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// remove function arg
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for(s=SP-i-1; s < (int)SP-1; s++)
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Stack[s] = Stack[s+1];
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SP--;
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n = i;
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switch (op) {
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case OP_LIST: goto apply_list;
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case OP_ADD: goto apply_add;
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case OP_SUB: goto apply_sub;
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case OP_MUL: goto apply_mul;
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case OP_DIV: goto apply_div;
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case OP_VECTOR: goto apply_vector;
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default:
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goto dispatch;
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}
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}
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}
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else if (iscons(func)) {
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@ -1637,8 +1667,7 @@ static value_t apply_cl(uint32_t nargs)
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}
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}
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else {
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PUSH(fixnum(i));
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v = toplevel_eval(special_applyn_form);
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v = _applyn(i);
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}
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}
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else {
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@ -1755,6 +1784,7 @@ static value_t apply_cl(uint32_t nargs)
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POPN(1); break;
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case OP_LIST:
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i = code[ip++];
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apply_list:
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if (i > 0)
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v = list(&Stack[SP-i], i);
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else
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@ -1784,8 +1814,9 @@ static value_t apply_cl(uint32_t nargs)
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goto do_call;
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case OP_ADD:
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s = 0;
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n = code[ip++];
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apply_add:
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s = 0;
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i = SP-n;
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if (n > MAX_ARGS) goto add_ovf;
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for (; i < SP; i++) {
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@ -1809,6 +1840,7 @@ static value_t apply_cl(uint32_t nargs)
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break;
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case OP_SUB:
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n = code[ip++];
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apply_sub:
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if (__unlikely(n < 1)) lerror(ArgError, "-: too few arguments");
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i = SP-n;
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if (n == 1) {
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@ -1845,8 +1877,9 @@ static value_t apply_cl(uint32_t nargs)
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PUSH(v);
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break;
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case OP_MUL:
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accum = 1;
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n = code[ip++];
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apply_mul:
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accum = 1;
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i = SP-n;
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if (n > MAX_ARGS) goto mul_ovf;
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for (; i < SP; i++) {
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@ -1870,6 +1903,7 @@ static value_t apply_cl(uint32_t nargs)
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break;
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case OP_DIV:
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n = code[ip++];
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apply_div:
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if (__unlikely(n < 1)) lerror(ArgError, "/: too few arguments");
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i = SP-n;
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if (n == 1) {
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@ -1916,19 +1950,20 @@ static value_t apply_cl(uint32_t nargs)
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case OP_VECTOR:
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n = code[ip++];
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apply_vector:
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if (n > MAX_ARGS) {
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i = llength(Stack[SP-1]);
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n--;
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i = llength(Stack[SP-1])-1;
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}
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else i = 0;
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v = alloc_vector(n+i, 0);
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memcpy(&vector_elt(v,0), &Stack[SP-n], n*sizeof(value_t));
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if (i > 0) {
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e = POP();
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POPN(n);
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e = POP();
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POPN(n-1);
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if (n > MAX_ARGS) {
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i = n-1;
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while (iscons(e)) {
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vector_elt(v,n) = car_(e);
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n++;
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vector_elt(v,i) = car_(e);
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i++;
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e = cdr_(e);
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}
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}
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@ -2200,11 +2235,10 @@ static void lisp_init(void)
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set(printwidthsym=symbol("*print-width*"), fixnum(SCR_WIDTH));
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lasterror = NIL;
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special_apply_form = fl_cons(builtin(F_SPECIAL_APPLY), NIL);
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special_applyn_form = fl_cons(builtin(F_SPECIAL_APPLYN), NIL);
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apply1_args = fl_cons(NIL, NIL);
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i = 0;
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while (isspecial(builtin(i))) {
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if (i != F_SPECIAL_APPLY && i != F_SPECIAL_APPLYN)
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if (i != F_SPECIAL_APPLY)
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((symbol_t*)ptr(symbol(builtin_names[i])))->syntax = builtin(i);
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i++;
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}
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@ -2304,7 +2338,7 @@ int main(int argc, char *argv[])
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PUSH(symbol_value(symbol("__start")));
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PUSH(argv_list(argc, argv));
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(void)toplevel_eval(special_apply_form);
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(void)_applyn(1);
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}
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FL_CATCH {
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ios_puts("fatal error during bootstrap:\n", ios_stderr);
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@ -117,8 +117,7 @@ extern uint32_t SP;
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enum {
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// special forms
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F_QUOTE=0, F_COND, F_IF, F_AND, F_OR, F_WHILE, F_LAMBDA,
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F_TRYCATCH, F_SPECIAL_APPLY, F_SPECIAL_APPLYN, F_SETQ, F_PROG1, F_FOR,
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F_BEGIN,
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F_TRYCATCH, F_SPECIAL_APPLY, F_SETQ, F_PROG1, F_FOR, F_BEGIN,
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// functions
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F_EQ, F_EQV, F_EQUAL, F_ATOM, F_NOT, F_NULL, F_BOOLEANP, F_SYMBOLP,
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@ -141,7 +140,6 @@ value_t read_sexpr(value_t f);
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void print(ios_t *f, value_t v, int princ);
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value_t toplevel_eval(value_t expr);
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value_t apply(value_t f, value_t l);
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value_t apply1(value_t f, value_t a0);
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value_t applyn(uint32_t n, value_t f, ...);
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value_t load_file(char *fname);
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@ -3,7 +3,7 @@
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enum {
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OP_NOP=0, OP_DUP, OP_POP, OP_CALL, OP_TCALL, OP_JMP, OP_BRF, OP_BRT,
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OP_JMPL, OP_BRFL, OP_BRTL, OP_RET, OP_TAPPLY, OP_FOR,
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OP_JMPL, OP_BRFL, OP_BRTL, OP_RET, OP_TAPPLY,
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OP_EQ, OP_EQV, OP_EQUAL, OP_ATOMP, OP_NOT, OP_NULLP, OP_BOOLEANP,
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OP_SYMBOLP, OP_NUMBERP, OP_BOUNDP, OP_PAIRP, OP_BUILTINP, OP_VECTORP,
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@ -20,7 +20,7 @@ enum {
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OP_LOADV, OP_LOADVL, OP_LOADG, OP_LOADA, OP_LOADC, OP_LOADGL,
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OP_SETG, OP_SETA, OP_SETC, OP_SETGL,
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OP_CLOSURE, OP_TRYCATCH, OP_ARGC, OP_VARGC, OP_CLOSE, OP_LET
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OP_CLOSURE, OP_TRYCATCH, OP_ARGC, OP_VARGC, OP_CLOSE, OP_LET, OP_FOR
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};
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#endif
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@ -735,7 +735,7 @@
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(lambda (e) (begin (print-exception e)
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(exit 1)))))
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(define (__start . argv)
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(define (__start argv)
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; reload this file with our new definition of load
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(load (string *install-dir* *directory-separator* "system.lsp"))
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(if (pair? (cdr argv))
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