1152 lines
27 KiB
C
1152 lines
27 KiB
C
/**
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* See Copyright Notice in picrin.h
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*/
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#include <stdlib.h>
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#include <stdarg.h>
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#include <limits.h>
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#include <math.h>
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#include "picrin.h"
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#include "picrin/pair.h"
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#include "picrin/string.h"
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#include "picrin/vector.h"
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#include "picrin/proc.h"
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#include "picrin/port.h"
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#include "picrin/irep.h"
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#include "picrin/blob.h"
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#include "picrin/lib.h"
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#include "picrin/macro.h"
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#include "picrin/error.h"
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#include "picrin/dict.h"
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#include "picrin/record.h"
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#define GET_OPERAND(pic,n) ((pic)->ci->fp[(n)])
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struct pic_proc *
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pic_get_proc(pic_state *pic)
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{
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pic_value v = GET_OPERAND(pic,0);
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if (! pic_proc_p(v)) {
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pic_errorf(pic, "fatal error");
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}
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return pic_proc_ptr(v);
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}
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/**
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* char type desc.
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* ---- ---- ----
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* o pic_value * object
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* i int * int
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* I int *, bool * int with exactness
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* k size_t * size_t implicitly converted from int
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* f double * float
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* F double *, bool * float with exactness
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* s pic_str ** string object
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* z char ** c string
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* m pic_sym * symbol
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* v pic_vec ** vector object
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* b pic_blob ** bytevector object
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* c char * char
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* l struct pic_proc ** lambda object
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* p struct pic_port ** port object
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* d struct pic_dict ** dictionary object
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* e struct pic_error ** error object
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*
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* | optional operator
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* * int *, pic_value ** variable length operator
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*/
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int
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pic_get_args(pic_state *pic, const char *format, ...)
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{
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char c;
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int i = 1, argc = pic->ci->argc;
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va_list ap;
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bool opt = false;
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va_start(ap, format);
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while ((c = *format++)) {
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switch (c) {
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default:
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if (argc <= i && ! opt) {
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pic_errorf(pic, "wrong number of arguments");
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}
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break;
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case '|':
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break;
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case '*':
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break;
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}
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/* in order to run out of all arguments passed to this function
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(i.e. do va_arg for each argument), optional argument existence
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check is done in every case closure */
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if (c == '*')
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break;
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switch (c) {
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case '|':
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opt = true;
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break;
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case 'o': {
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pic_value *p;
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p = va_arg(ap, pic_value*);
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if (i < argc) {
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*p = GET_OPERAND(pic,i);
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i++;
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}
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break;
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}
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case 'f': {
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double *f;
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f = va_arg(ap, double *);
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if (i < argc) {
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pic_value v;
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v = GET_OPERAND(pic, i);
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switch (pic_type(v)) {
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case PIC_TT_FLOAT:
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*f = pic_float(v);
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break;
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case PIC_TT_INT:
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*f = pic_int(v);
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break;
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default:
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pic_errorf(pic, "pic_get_args: expected float or int, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'F': {
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double *f;
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bool *e;
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f = va_arg(ap, double *);
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e = va_arg(ap, bool *);
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if (i < argc) {
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pic_value v;
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v = GET_OPERAND(pic, i);
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switch (pic_type(v)) {
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case PIC_TT_FLOAT:
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*f = pic_float(v);
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*e = false;
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break;
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case PIC_TT_INT:
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*f = pic_int(v);
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*e = true;
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break;
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default:
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pic_errorf(pic, "pic_get_args: expected float or int, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'I': {
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int *k;
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bool *e;
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k = va_arg(ap, int *);
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e = va_arg(ap, bool *);
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if (i < argc) {
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pic_value v;
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v = GET_OPERAND(pic, i);
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switch (pic_type(v)) {
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case PIC_TT_FLOAT:
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*k = (int)pic_float(v);
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*e = false;
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break;
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case PIC_TT_INT:
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*k = pic_int(v);
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*e = true;
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break;
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default:
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pic_errorf(pic, "pic_get_args: expected float or int, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'i': {
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int *k;
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k = va_arg(ap, int *);
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if (i < argc) {
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pic_value v;
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v = GET_OPERAND(pic, i);
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switch (pic_type(v)) {
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case PIC_TT_FLOAT:
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*k = (int)pic_float(v);
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break;
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case PIC_TT_INT:
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*k = pic_int(v);
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break;
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default:
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pic_errorf(pic, "pic_get_args: expected int, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'k': {
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size_t *k;
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k = va_arg(ap, size_t *);
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if (i < argc) {
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pic_value v;
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int x;
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v = GET_OPERAND(pic, i);
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switch (pic_type(v)) {
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case PIC_TT_INT:
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x = pic_int(v);
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if (x < 0) {
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pic_errorf(pic, "pic_get_args: expected non-negative int, but got ~s", v);
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}
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if (sizeof(unsigned) > sizeof(size_t)) {
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if ((unsigned)x > (unsigned)SIZE_MAX) {
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pic_errorf(pic, "pic_get_args: int unrepresentable with size_t ~s", v);
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}
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}
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*k = (size_t)x;
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break;
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default:
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pic_errorf(pic, "pic_get_args: expected int, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 's': {
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pic_str **str;
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pic_value v;
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str = va_arg(ap, pic_str **);
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if (i < argc) {
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v = GET_OPERAND(pic,i);
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if (pic_str_p(v)) {
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*str = pic_str_ptr(v);
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}
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else {
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pic_errorf(pic, "pic_get_args: expected string, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'z': {
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const char **cstr;
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pic_value v;
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cstr = va_arg(ap, const char **);
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if (i < argc) {
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v = GET_OPERAND(pic,i);
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if (! pic_str_p(v)) {
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pic_errorf(pic, "pic_get_args: expected string, but got ~s", v);
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}
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*cstr = pic_str_cstr(pic_str_ptr(v));
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i++;
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}
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break;
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}
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case 'm': {
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pic_sym *m;
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pic_value v;
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m = va_arg(ap, pic_sym *);
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if (i < argc) {
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v = GET_OPERAND(pic,i);
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if (pic_sym_p(v)) {
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*m = pic_sym(v);
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}
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else {
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pic_errorf(pic, "pic_get_args: expected symbol, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'v': {
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struct pic_vector **vec;
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pic_value v;
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vec = va_arg(ap, struct pic_vector **);
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if (i < argc) {
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v = GET_OPERAND(pic,i);
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if (pic_vec_p(v)) {
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*vec = pic_vec_ptr(v);
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}
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else {
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pic_errorf(pic, "pic_get_args: expected vector, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'b': {
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struct pic_blob **b;
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pic_value v;
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b = va_arg(ap, struct pic_blob **);
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if (i < argc) {
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v = GET_OPERAND(pic,i);
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if (pic_blob_p(v)) {
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*b = pic_blob_ptr(v);
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}
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else {
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pic_errorf(pic, "pic_get_args: expected bytevector, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'c': {
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char *k;
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pic_value v;
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k = va_arg(ap, char *);
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if (i < argc) {
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v = GET_OPERAND(pic,i);
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if (pic_char_p(v)) {
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*k = pic_char(v);
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}
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else {
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pic_errorf(pic, "pic_get_args: expected char, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'l': {
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struct pic_proc **l;
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pic_value v;
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l = va_arg(ap, struct pic_proc **);
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if (i < argc) {
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v = GET_OPERAND(pic,i);
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if (pic_proc_p(v)) {
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*l = pic_proc_ptr(v);
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}
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else {
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pic_errorf(pic, "pic_get_args, expected procedure, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'p': {
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struct pic_port **p;
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pic_value v;
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p = va_arg(ap, struct pic_port **);
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if (i < argc) {
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v = GET_OPERAND(pic,i);
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if (pic_port_p(v)) {
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*p = pic_port_ptr(v);
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}
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else {
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pic_errorf(pic, "pic_get_args, expected port, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'd': {
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struct pic_dict **d;
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pic_value v;
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d = va_arg(ap, struct pic_dict **);
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if (i < argc) {
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v = GET_OPERAND(pic,i);
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if (pic_dict_p(v)) {
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*d = pic_dict_ptr(v);
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}
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else {
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pic_errorf(pic, "pic_get_args, expected dictionary, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'r': {
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struct pic_record **r;
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pic_value v;
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r = va_arg(ap, struct pic_record **);
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if (i < argc) {
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v = GET_OPERAND(pic,i);
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if (pic_record_p(v)) {
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*r = pic_record_ptr(v);
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}
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else {
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pic_errorf(pic, "pic_get_args: expected record, but got ~s", v);
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}
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i++;
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}
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break;
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}
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case 'e': {
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struct pic_error **e;
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pic_value v;
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e = va_arg(ap, struct pic_error **);
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if (i < argc) {
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v = GET_OPERAND(pic,i);
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if (pic_error_p(v)) {
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*e = pic_error_ptr(v);
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}
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else {
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pic_errorf(pic, "pic_get_args, expected error");
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}
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i++;
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}
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break;
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}
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default:
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pic_errorf(pic, "pic_get_args: invalid argument specifier '%c' given", c);
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}
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}
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if ('*' == c) {
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int *n;
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pic_value **argv;
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n = va_arg(ap, int *);
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argv = va_arg(ap, pic_value **);
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if (i <= argc) {
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*n = argc - i;
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*argv = &GET_OPERAND(pic, i);
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i = argc;
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}
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}
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else if (argc > i) {
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pic_errorf(pic, "wrong number of arguments");
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}
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va_end(ap);
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return i - 1;
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}
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void
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pic_define_noexport(pic_state *pic, const char *name, pic_value val)
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{
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pic_sym sym, rename;
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sym = pic_intern_cstr(pic, name);
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if (! pic_find_rename(pic, pic->lib->env, sym, &rename)) {
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rename = pic_add_rename(pic, pic->lib->env, sym);
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} else {
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pic_warn(pic, "redefining global");
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}
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xh_put_int(&pic->globals, rename, &val);
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}
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void
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pic_define(pic_state *pic, const char *name, pic_value val)
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{
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pic_define_noexport(pic, name, val);
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pic_export(pic, pic_intern_cstr(pic, name));
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}
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pic_value
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pic_ref(pic_state *pic, struct pic_lib *lib, const char *name)
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{
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pic_sym sym, rename;
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sym = pic_intern_cstr(pic, name);
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if (! pic_find_rename(pic, lib->env, sym, &rename)) {
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pic_errorf(pic, "symbol \"%s\" not defined in library ~s", name, lib->name);
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}
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return xh_val(xh_get_int(&pic->globals, rename), pic_value);
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}
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void
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pic_set(pic_state *pic, struct pic_lib *lib, const char *name, pic_value val)
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{
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pic_sym sym, rename;
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sym = pic_intern_cstr(pic, name);
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if (! pic_find_rename(pic, lib->env, sym, &rename)) {
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pic_errorf(pic, "symbol \"%s\" not defined in library ~s", name, lib->name);
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}
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xh_put_int(&pic->globals, rename, &val);
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}
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pic_value
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pic_funcall(pic_state *pic, struct pic_lib *lib, const char *name, pic_list args)
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{
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pic_value proc;
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proc = pic_ref(pic, lib, name);
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pic_assert_type(pic, proc, proc);
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return pic_apply(pic, pic_proc_ptr(proc), args);
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}
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|
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void
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pic_defun(pic_state *pic, const char *name, pic_func_t cfunc)
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{
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struct pic_proc *proc;
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proc = pic_make_proc(pic, cfunc, name);
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pic_define(pic, name, pic_obj_value(proc));
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}
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|
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void
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pic_defvar(pic_state *pic, const char *name, pic_value init, struct pic_proc *conv)
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{
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pic_define(pic, name, pic_obj_value(pic_make_var(pic, init, conv)));
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}
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|
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static void
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vm_push_env(pic_state *pic)
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{
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pic_callinfo *ci = pic->ci;
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ci->env = (struct pic_env *)pic_obj_alloc(pic, offsetof(struct pic_env, storage) + sizeof(pic_value) * (size_t)(ci->regc), PIC_TT_ENV);
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ci->env->up = ci->up;
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ci->env->regc = ci->regc;
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ci->env->regs = ci->regs;
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}
|
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|
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static void
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vm_tear_off(pic_callinfo *ci)
|
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{
|
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struct pic_env *env;
|
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int i;
|
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|
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assert(ci->env != NULL);
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env = ci->env;
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if (env->regs == env->storage) {
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return; /* is torn off */
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}
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for (i = 0; i < env->regc; ++i) {
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env->storage[i] = env->regs[i];
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}
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env->regs = env->storage;
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}
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|
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void
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pic_vm_tear_off(pic_state *pic)
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{
|
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pic_callinfo *ci;
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|
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for (ci = pic->ci; ci > pic->cibase; ci--) {
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if (ci->env != NULL) {
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vm_tear_off(ci);
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}
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}
|
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}
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|
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pic_value
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pic_apply0(pic_state *pic, struct pic_proc *proc)
|
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{
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return pic_apply(pic, proc, pic_nil_value());
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}
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|
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pic_value
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pic_apply1(pic_state *pic, struct pic_proc *proc, pic_value arg1)
|
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{
|
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return pic_apply(pic, proc, pic_list1(pic, arg1));
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}
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|
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pic_value
|
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pic_apply2(pic_state *pic, struct pic_proc *proc, pic_value arg1, pic_value arg2)
|
|
{
|
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return pic_apply(pic, proc, pic_list2(pic, arg1, arg2));
|
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}
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|
|
pic_value
|
|
pic_apply3(pic_state *pic, struct pic_proc *proc, pic_value arg1, pic_value arg2, pic_value arg3)
|
|
{
|
|
return pic_apply(pic, proc, pic_list3(pic, arg1, arg2, arg3));
|
|
}
|
|
|
|
pic_value
|
|
pic_apply4(pic_state *pic, struct pic_proc *proc, pic_value arg1, pic_value arg2, pic_value arg3, pic_value arg4)
|
|
{
|
|
return pic_apply(pic, proc, pic_list4(pic, arg1, arg2, arg3, arg4));
|
|
}
|
|
|
|
pic_value
|
|
pic_apply5(pic_state *pic, struct pic_proc *proc, pic_value arg1, pic_value arg2, pic_value arg3, pic_value arg4, pic_value arg5)
|
|
{
|
|
return pic_apply(pic, proc, pic_list5(pic, arg1, arg2, arg3, arg4, arg5));
|
|
}
|
|
|
|
#if VM_DEBUG
|
|
# define OPCODE_EXEC_HOOK pic_dump_code(c)
|
|
#else
|
|
# define OPCODE_EXEC_HOOK ((void)0)
|
|
#endif
|
|
|
|
#if PIC_DIRECT_THREADED_VM
|
|
# define VM_LOOP JUMP;
|
|
# define CASE(x) L_##x: OPCODE_EXEC_HOOK;
|
|
# define NEXT pic->ip++; JUMP;
|
|
# define JUMP c = *pic->ip; goto *oplabels[c.insn];
|
|
# define VM_LOOP_END
|
|
#else
|
|
# define VM_LOOP for (;;) { c = *pic->ip; switch (c.insn) {
|
|
# define CASE(x) case x:
|
|
# define NEXT pic->ip++; break
|
|
# define JUMP break
|
|
# define VM_LOOP_END } }
|
|
#endif
|
|
|
|
#define PUSH(v) (*pic->sp++ = (v))
|
|
#define POP() (*--pic->sp)
|
|
|
|
#define PUSHCI() (++pic->ci)
|
|
#define POPCI() (pic->ci--)
|
|
|
|
#if VM_DEBUG
|
|
# define VM_BOOT_PRINT \
|
|
do { \
|
|
puts("### booting VM... ###"); \
|
|
stbase = pic->sp; \
|
|
cibase = pic->ci; \
|
|
} while (0)
|
|
#else
|
|
# define VM_BOOT_PRINT
|
|
#endif
|
|
|
|
#if VM_DEBUG
|
|
# define VM_END_PRINT \
|
|
do { \
|
|
puts("**VM END STATE**"); \
|
|
printf("stbase\t= %p\nsp\t= %p\n", (void *)stbase, (void *)pic->sp); \
|
|
printf("cibase\t= %p\nci\t= %p\n", (void *)cibase, (void *)pic->ci); \
|
|
if (stbase < pic->sp - 1) { \
|
|
pic_value *sp; \
|
|
printf("* stack trace:"); \
|
|
for (sp = stbase; pic->sp != sp; ++sp) { \
|
|
pic_debug(pic, *sp); \
|
|
puts(""); \
|
|
} \
|
|
} \
|
|
if (stbase > pic->sp - 1) { \
|
|
puts("*** stack underflow!"); \
|
|
} \
|
|
} while (0)
|
|
#else
|
|
# define VM_END_PRINT
|
|
#endif
|
|
|
|
#if VM_DEBUG
|
|
# define VM_CALL_PRINT \
|
|
do { \
|
|
puts("\n== calling proc..."); \
|
|
printf(" proc = "); \
|
|
pic_debug(pic, pic_obj_value(proc)); \
|
|
puts(""); \
|
|
printf(" argv = ("); \
|
|
for (short i = 1; i < c.u.i; ++i) { \
|
|
if (i > 1) \
|
|
printf(" "); \
|
|
pic_debug(pic, pic->sp[-c.u.i + i]); \
|
|
} \
|
|
puts(")"); \
|
|
if (! pic_proc_func_p(proc)) { \
|
|
printf(" irep = %p\n", proc->u.irep); \
|
|
printf(" name = %s\n", pic_symbol_name(pic, pic_proc_name(proc))); \
|
|
pic_dump_irep(proc->u.irep); \
|
|
} \
|
|
else { \
|
|
printf(" cfunc = %p\n", (void *)proc->u.func.f); \
|
|
printf(" name = %s\n", pic_symbol_name(pic, pic_proc_name(proc))); \
|
|
} \
|
|
puts("== end\n"); \
|
|
} while (0)
|
|
#else
|
|
# define VM_CALL_PRINT
|
|
#endif
|
|
|
|
pic_value
|
|
pic_apply(pic_state *pic, struct pic_proc *proc, pic_value args)
|
|
{
|
|
pic_code c;
|
|
size_t ai = pic_gc_arena_preserve(pic);
|
|
pic_code boot[2];
|
|
|
|
#if PIC_DIRECT_THREADED_VM
|
|
static void *oplabels[] = {
|
|
&&L_OP_NOP, &&L_OP_POP, &&L_OP_PUSHNIL, &&L_OP_PUSHTRUE, &&L_OP_PUSHFALSE,
|
|
&&L_OP_PUSHINT, &&L_OP_PUSHCHAR, &&L_OP_PUSHCONST,
|
|
&&L_OP_GREF, &&L_OP_GSET, &&L_OP_LREF, &&L_OP_LSET, &&L_OP_CREF, &&L_OP_CSET,
|
|
&&L_OP_JMP, &&L_OP_JMPIF, &&L_OP_NOT, &&L_OP_CALL, &&L_OP_TAILCALL, &&L_OP_RET,
|
|
&&L_OP_LAMBDA, &&L_OP_CONS, &&L_OP_CAR, &&L_OP_CDR, &&L_OP_NILP,
|
|
&&L_OP_ADD, &&L_OP_SUB, &&L_OP_MUL, &&L_OP_DIV, &&L_OP_MINUS,
|
|
&&L_OP_EQ, &&L_OP_LT, &&L_OP_LE, &&L_OP_STOP
|
|
};
|
|
#endif
|
|
|
|
#if VM_DEBUG
|
|
pic_value *stbase;
|
|
pic_callinfo *cibase;
|
|
#endif
|
|
|
|
if (! pic_list_p(args)) {
|
|
pic_errorf(pic, "argv must be a proper list");
|
|
}
|
|
else {
|
|
int argc, i;
|
|
|
|
argc = (int)pic_length(pic, args) + 1;
|
|
|
|
VM_BOOT_PRINT;
|
|
|
|
PUSH(pic_obj_value(proc));
|
|
for (i = 1; i < argc; ++i) {
|
|
PUSH(pic_car(pic, args));
|
|
args = pic_cdr(pic, args);
|
|
}
|
|
|
|
/* boot! */
|
|
boot[0].insn = OP_CALL;
|
|
boot[0].u.i = argc;
|
|
boot[1].insn = OP_STOP;
|
|
pic->ip = boot;
|
|
}
|
|
|
|
VM_LOOP {
|
|
CASE(OP_NOP) {
|
|
NEXT;
|
|
}
|
|
CASE(OP_POP) {
|
|
POP();
|
|
NEXT;
|
|
}
|
|
CASE(OP_PUSHNIL) {
|
|
PUSH(pic_nil_value());
|
|
NEXT;
|
|
}
|
|
CASE(OP_PUSHTRUE) {
|
|
PUSH(pic_true_value());
|
|
NEXT;
|
|
}
|
|
CASE(OP_PUSHFALSE) {
|
|
PUSH(pic_false_value());
|
|
NEXT;
|
|
}
|
|
CASE(OP_PUSHINT) {
|
|
PUSH(pic_int_value(c.u.i));
|
|
NEXT;
|
|
}
|
|
CASE(OP_PUSHCHAR) {
|
|
PUSH(pic_char_value(c.u.c));
|
|
NEXT;
|
|
}
|
|
CASE(OP_PUSHCONST) {
|
|
pic_value self;
|
|
struct pic_irep *irep;
|
|
|
|
self = pic->ci->fp[0];
|
|
if (! pic_proc_p(self)) {
|
|
pic_errorf(pic, "logic flaw");
|
|
}
|
|
irep = pic_proc_ptr(self)->u.irep;
|
|
if (! pic_proc_irep_p(pic_proc_ptr(self))) {
|
|
pic_errorf(pic, "logic flaw");
|
|
}
|
|
PUSH(irep->pool[c.u.i]);
|
|
NEXT;
|
|
}
|
|
CASE(OP_GREF) {
|
|
xh_entry *e;
|
|
|
|
if ((e = xh_get_int(&pic->globals, c.u.i)) == NULL) {
|
|
pic_errorf(pic, "logic flaw; reference to uninitialized global variable: %s", pic_symbol_name(pic, c.u.i));
|
|
}
|
|
PUSH(xh_val(e, pic_value));
|
|
NEXT;
|
|
}
|
|
CASE(OP_GSET) {
|
|
pic_value val;
|
|
|
|
val = POP();
|
|
xh_put_int(&pic->globals, c.u.i, &val);
|
|
NEXT;
|
|
}
|
|
CASE(OP_LREF) {
|
|
pic_callinfo *ci = pic->ci;
|
|
struct pic_irep *irep;
|
|
|
|
if (ci->env != NULL && ci->env->regs == ci->env->storage) {
|
|
irep = pic_get_proc(pic)->u.irep;
|
|
if (c.u.i >= irep->argc + irep->localc) {
|
|
PUSH(ci->env->regs[c.u.i - (ci->regs - ci->fp)]);
|
|
NEXT;
|
|
}
|
|
}
|
|
PUSH(pic->ci->fp[c.u.i]);
|
|
NEXT;
|
|
}
|
|
CASE(OP_LSET) {
|
|
pic_callinfo *ci = pic->ci;
|
|
struct pic_irep *irep;
|
|
|
|
if (ci->env != NULL && ci->env->regs == ci->env->storage) {
|
|
irep = pic_get_proc(pic)->u.irep;
|
|
if (c.u.i >= irep->argc + irep->localc) {
|
|
ci->env->regs[c.u.i - (ci->regs - ci->fp)] = POP();
|
|
NEXT;
|
|
}
|
|
}
|
|
pic->ci->fp[c.u.i] = POP();
|
|
NEXT;
|
|
}
|
|
CASE(OP_CREF) {
|
|
int depth = c.u.r.depth;
|
|
struct pic_env *env;
|
|
|
|
env = pic->ci->up;
|
|
while (--depth) {
|
|
env = env->up;
|
|
}
|
|
PUSH(env->regs[c.u.r.idx]);
|
|
NEXT;
|
|
}
|
|
CASE(OP_CSET) {
|
|
int depth = c.u.r.depth;
|
|
struct pic_env *env;
|
|
|
|
env = pic->ci->up;
|
|
while (--depth) {
|
|
env = env->up;
|
|
}
|
|
env->regs[c.u.r.idx] = POP();
|
|
NEXT;
|
|
}
|
|
CASE(OP_JMP) {
|
|
pic->ip += c.u.i;
|
|
JUMP;
|
|
}
|
|
CASE(OP_JMPIF) {
|
|
pic_value v;
|
|
|
|
v = POP();
|
|
if (! pic_false_p(v)) {
|
|
pic->ip += c.u.i;
|
|
JUMP;
|
|
}
|
|
NEXT;
|
|
}
|
|
CASE(OP_NOT) {
|
|
pic_value v;
|
|
|
|
v = pic_false_p(POP()) ? pic_true_value() : pic_false_value();
|
|
PUSH(v);
|
|
NEXT;
|
|
}
|
|
CASE(OP_CALL) {
|
|
pic_value x, v;
|
|
pic_callinfo *ci;
|
|
|
|
if (c.u.i == -1) {
|
|
pic->sp += pic->ci[1].retc - 1;
|
|
c.u.i = pic->ci[1].retc + 1;
|
|
}
|
|
|
|
L_CALL:
|
|
x = pic->sp[-c.u.i];
|
|
if (! pic_proc_p(x)) {
|
|
pic_errorf(pic, "invalid application: ~s", x);
|
|
}
|
|
proc = pic_proc_ptr(x);
|
|
|
|
VM_CALL_PRINT;
|
|
|
|
if (pic->sp >= pic->stend) {
|
|
pic_panic(pic, "VM stack overflow");
|
|
}
|
|
|
|
ci = PUSHCI();
|
|
ci->argc = c.u.i;
|
|
ci->retc = 1;
|
|
ci->ip = pic->ip;
|
|
ci->fp = pic->sp - c.u.i;
|
|
ci->env = NULL;
|
|
if (pic_proc_func_p(pic_proc_ptr(x))) {
|
|
|
|
/* invoke! */
|
|
v = proc->u.func.f(pic);
|
|
pic->sp[0] = v;
|
|
pic->sp += pic->ci->retc;
|
|
|
|
pic_gc_arena_restore(pic, ai);
|
|
goto L_RET;
|
|
}
|
|
else {
|
|
struct pic_irep *irep = proc->u.irep;
|
|
int i;
|
|
pic_value rest;
|
|
|
|
if (ci->argc != irep->argc) {
|
|
if (! (irep->varg && ci->argc >= irep->argc)) {
|
|
pic_errorf(pic, "wrong number of arguments (%d for %d%s)", ci->argc - 1, irep->argc - 1, (irep->varg ? "+" : ""));
|
|
}
|
|
}
|
|
/* prepare rest args */
|
|
if (irep->varg) {
|
|
rest = pic_nil_value();
|
|
for (i = 0; i < ci->argc - irep->argc; ++i) {
|
|
pic_gc_protect(pic, v = POP());
|
|
rest = pic_cons(pic, v, rest);
|
|
}
|
|
PUSH(rest);
|
|
}
|
|
/* prepare local variable area */
|
|
if (irep->localc > 0) {
|
|
int l = irep->localc;
|
|
if (irep->varg) {
|
|
--l;
|
|
}
|
|
for (i = 0; i < l; ++i) {
|
|
PUSH(pic_undef_value());
|
|
}
|
|
}
|
|
|
|
/* prepare env */
|
|
ci->up = proc->env;
|
|
ci->regc = irep->capturec;
|
|
ci->regs = ci->fp + irep->argc + irep->localc;
|
|
|
|
pic->ip = irep->code;
|
|
pic_gc_arena_restore(pic, ai);
|
|
JUMP;
|
|
}
|
|
}
|
|
CASE(OP_TAILCALL) {
|
|
int i, argc;
|
|
pic_value *argv;
|
|
pic_callinfo *ci;
|
|
|
|
if (pic->ci->env != NULL) {
|
|
vm_tear_off(pic->ci);
|
|
}
|
|
|
|
if (c.u.i == -1) {
|
|
pic->sp += pic->ci[1].retc - 1;
|
|
c.u.i = pic->ci[1].retc + 1;
|
|
}
|
|
|
|
argc = c.u.i;
|
|
argv = pic->sp - argc;
|
|
for (i = 0; i < argc; ++i) {
|
|
pic->ci->fp[i] = argv[i];
|
|
}
|
|
ci = POPCI();
|
|
pic->sp = ci->fp + argc;
|
|
pic->ip = ci->ip;
|
|
|
|
/* c is not changed */
|
|
goto L_CALL;
|
|
}
|
|
CASE(OP_RET) {
|
|
int i, retc;
|
|
pic_value *retv;
|
|
pic_callinfo *ci;
|
|
|
|
if (pic->ci->env != NULL) {
|
|
vm_tear_off(pic->ci);
|
|
}
|
|
|
|
pic->ci->retc = c.u.i;
|
|
|
|
L_RET:
|
|
retc = pic->ci->retc;
|
|
retv = pic->sp - retc;
|
|
if (retc == 0) {
|
|
pic->ci->fp[0] = retv[0]; /* copy at least once */
|
|
}
|
|
for (i = 0; i < retc; ++i) {
|
|
pic->ci->fp[i] = retv[i];
|
|
}
|
|
ci = POPCI();
|
|
pic->sp = ci->fp + 1; /* advance only one! */
|
|
pic->ip = ci->ip;
|
|
|
|
NEXT;
|
|
}
|
|
CASE(OP_LAMBDA) {
|
|
pic_value self;
|
|
struct pic_irep *irep;
|
|
|
|
self = pic->ci->fp[0];
|
|
if (! pic_proc_p(self)) {
|
|
pic_errorf(pic, "logic flaw");
|
|
}
|
|
irep = pic_proc_ptr(self)->u.irep;
|
|
if (! pic_proc_irep_p(pic_proc_ptr(self))) {
|
|
pic_errorf(pic, "logic flaw");
|
|
}
|
|
|
|
if (pic->ci->env == NULL) {
|
|
vm_push_env(pic);
|
|
}
|
|
|
|
proc = pic_make_proc_irep(pic, irep->irep[c.u.i], pic->ci->env);
|
|
PUSH(pic_obj_value(proc));
|
|
pic_gc_arena_restore(pic, ai);
|
|
NEXT;
|
|
}
|
|
CASE(OP_CONS) {
|
|
pic_value a, b;
|
|
pic_gc_protect(pic, b = POP());
|
|
pic_gc_protect(pic, a = POP());
|
|
PUSH(pic_cons(pic, a, b));
|
|
pic_gc_arena_restore(pic, ai);
|
|
NEXT;
|
|
}
|
|
CASE(OP_CAR) {
|
|
pic_value p;
|
|
p = POP();
|
|
PUSH(pic_car(pic, p));
|
|
NEXT;
|
|
}
|
|
CASE(OP_CDR) {
|
|
pic_value p;
|
|
p = POP();
|
|
PUSH(pic_cdr(pic, p));
|
|
NEXT;
|
|
}
|
|
CASE(OP_NILP) {
|
|
pic_value p;
|
|
p = POP();
|
|
PUSH(pic_bool_value(pic_nil_p(p)));
|
|
NEXT;
|
|
}
|
|
|
|
#define DEFINE_ARITH_OP(opcode, op, guard) \
|
|
CASE(opcode) { \
|
|
pic_value a, b; \
|
|
b = POP(); \
|
|
a = POP(); \
|
|
if (pic_int_p(a) && pic_int_p(b)) { \
|
|
double f = (double)pic_int(a) op (double)pic_int(b); \
|
|
if (INT_MIN <= f && f <= INT_MAX && (guard)) { \
|
|
PUSH(pic_int_value((int)f)); \
|
|
} \
|
|
else { \
|
|
PUSH(pic_float_value(f)); \
|
|
} \
|
|
} \
|
|
else if (pic_float_p(a) && pic_float_p(b)) { \
|
|
PUSH(pic_float_value(pic_float(a) op pic_float(b))); \
|
|
} \
|
|
else if (pic_int_p(a) && pic_float_p(b)) { \
|
|
PUSH(pic_float_value(pic_int(a) op pic_float(b))); \
|
|
} \
|
|
else if (pic_float_p(a) && pic_int_p(b)) { \
|
|
PUSH(pic_float_value(pic_float(a) op pic_int(b))); \
|
|
} \
|
|
else { \
|
|
pic_errorf(pic, #op " got non-number operands"); \
|
|
} \
|
|
NEXT; \
|
|
}
|
|
|
|
DEFINE_ARITH_OP(OP_ADD, +, true);
|
|
DEFINE_ARITH_OP(OP_SUB, -, true);
|
|
DEFINE_ARITH_OP(OP_MUL, *, true);
|
|
DEFINE_ARITH_OP(OP_DIV, /, f == round(f));
|
|
|
|
CASE(OP_MINUS) {
|
|
pic_value n;
|
|
n = POP();
|
|
if (pic_int_p(n)) {
|
|
PUSH(pic_int_value(-pic_int(n)));
|
|
}
|
|
else if (pic_float_p(n)) {
|
|
PUSH(pic_float_value(-pic_float(n)));
|
|
}
|
|
else {
|
|
pic_errorf(pic, "unary - got a non-number operand");
|
|
}
|
|
NEXT;
|
|
}
|
|
|
|
#define DEFINE_COMP_OP(opcode, op) \
|
|
CASE(opcode) { \
|
|
pic_value a, b; \
|
|
b = POP(); \
|
|
a = POP(); \
|
|
if (pic_int_p(a) && pic_int_p(b)) { \
|
|
PUSH(pic_bool_value(pic_int(a) op pic_int(b))); \
|
|
} \
|
|
else if (pic_float_p(a) && pic_float_p(b)) { \
|
|
PUSH(pic_bool_value(pic_float(a) op pic_float(b))); \
|
|
} \
|
|
else if (pic_int_p(a) && pic_float_p(b)) { \
|
|
PUSH(pic_bool_value(pic_int(a) op pic_float(b))); \
|
|
} \
|
|
else if (pic_float_p(a) && pic_int_p(b)) { \
|
|
PUSH(pic_bool_value(pic_float(a) op pic_int(b))); \
|
|
} \
|
|
else { \
|
|
pic_errorf(pic, #op " got non-number operands"); \
|
|
} \
|
|
NEXT; \
|
|
}
|
|
|
|
DEFINE_COMP_OP(OP_EQ, ==);
|
|
DEFINE_COMP_OP(OP_LT, <);
|
|
DEFINE_COMP_OP(OP_LE, <=);
|
|
|
|
CASE(OP_STOP) {
|
|
|
|
VM_END_PRINT;
|
|
|
|
return pic_gc_protect(pic, POP());
|
|
}
|
|
} VM_LOOP_END;
|
|
}
|
|
|
|
pic_value
|
|
pic_apply_trampoline(pic_state *pic, struct pic_proc *proc, pic_value args)
|
|
{
|
|
static const pic_code iseq[2] = {
|
|
{ OP_NOP, { .i = 0 } },
|
|
{ OP_TAILCALL, { .i = -1 } }
|
|
};
|
|
|
|
pic_value v, *sp;
|
|
pic_callinfo *ci;
|
|
|
|
*pic->sp++ = pic_obj_value(proc);
|
|
|
|
sp = pic->sp;
|
|
pic_for_each (v, args) {
|
|
*sp++ = v;
|
|
}
|
|
|
|
ci = PUSHCI();
|
|
ci->ip = (pic_code *)iseq;
|
|
ci->fp = pic->sp;
|
|
ci->retc = (int)pic_length(pic, args);
|
|
|
|
if (ci->retc == 0) {
|
|
return pic_none_value();
|
|
} else {
|
|
return pic_car(pic, args);
|
|
}
|
|
}
|