mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-06 13:11:20 +00:00
1065 lines
21 KiB
C
1065 lines
21 KiB
C
#include <stdlib.h>
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#include <QF/mathlib.h>
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#include <QF/va.h>
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#include "qfcc.h"
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#include "scope.h"
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#include "qc-parse.h"
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extern function_t *current_func;
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static etype_t qc_types[] = {
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ev_void, // ex_label
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ev_void, // ex_block
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ev_void, // ex_expr
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ev_void, // ex_uexpr
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ev_void, // ex_def
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ev_void, // FIXME ex_int
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ev_float, // ex_float
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ev_string, // ex_string
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ev_vector, // ex_vector
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ev_void, // FIXME ex_quaternion
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};
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static type_t *types[] = {
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&type_void,
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&type_string,
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&type_float,
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&type_vector,
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&type_entity,
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&type_field,
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&type_function,
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&type_pointer,
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};
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static expr_type expr_types[] = {
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ex_label, // ev_void (ick)
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ex_string, // ev_string
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ex_float, // ev_float
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ex_vector, // ev_vector
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ex_label, // ev_entity (ick)
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ex_label, // ev_field (ick)
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ex_label, // ev_func (ick)
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ex_label, // ev_pointer (ick)
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};
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static const char *type_names[] = {
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"void",
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"string",
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"float",
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"vector",
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"entity",
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"field",
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"function",
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"pointer",
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"quaternion",
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};
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static etype_t
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get_type (expr_t *e)
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{
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switch (e->type) {
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case ex_label:
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case ex_block:
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case ex_quaternion: //FIXME
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return ev_void;
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case ex_expr:
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case ex_uexpr:
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return e->e.expr.type->type;
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case ex_def:
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return e->e.def->type->type;
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case ex_int: //FIXME?
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e->type = ex_float;
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e->e.float_val = e->e.int_val;
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return ev_float;
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case ex_float:
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case ex_string:
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case ex_vector:
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//FIXME case ex_quaternion:
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return qc_types[e->type];
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}
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return ev_void;
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}
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expr_t *
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error (expr_t *e, const char *fmt, ...)
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{
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va_list args;
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string_t file = s_file;
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int line = pr_source_line;
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va_start (args, fmt);
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if (e) {
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file = e->file;
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line = e->line;
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}
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fprintf (stderr, "%s:%d: ", strings + file, line);
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vfprintf (stderr, fmt, args);
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fputs ("\n", stderr);
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if (e) {
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e = new_expr ();
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e->type = ex_int;
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}
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va_end (args);
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pr_error_count++;
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return e;
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}
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void
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warning (expr_t *e, const char *fmt, ...)
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{
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va_list args;
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string_t file = s_file;
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int line = pr_source_line;
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if (options.warn_error) {
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options.warn_error = 0; // only want to do this once
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error (e, "warnings treated as errors");
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}
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va_start (args, fmt);
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if (e) {
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file = e->file;
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line = e->line;
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}
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fprintf (stderr, "%s:%d: warning:", strings + file, line);
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vfprintf (stderr, fmt, args);
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fputs ("\n", stderr);
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va_end (args);
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}
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expr_t *
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type_mismatch (expr_t *e1, expr_t *e2, int op)
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{
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etype_t t1, t2;
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char opname[4];
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t1 = get_type (e1);
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t2 = get_type (e2);
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switch (op) {
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case OR:
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opname[0] = '|';
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opname[1] = '|';
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opname[2] = 0;
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break;
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case AND:
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opname[0] = '&';
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opname[1] = '&';
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opname[2] = 0;
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break;
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case EQ:
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opname[0] = '=';
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opname[1] = '=';
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opname[2] = 0;
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break;
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case NE:
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opname[0] = '!';
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opname[1] = '=';
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opname[2] = 0;
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break;
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case LE:
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opname[0] = '<';
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opname[1] = '=';
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opname[2] = 0;
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break;
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case GE:
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opname[0] = '>';
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opname[1] = '=';
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opname[2] = 0;
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break;
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case LT:
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opname[0] = '<';
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opname[1] = 0;
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break;
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case GT:
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opname[0] = '>';
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opname[1] = 0;
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break;
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default:
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opname[0] = op;
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opname[1] = 0;
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break;
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}
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return error (e1, "type mismatch: %s %s %s",
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type_names[t1], opname, type_names[t2]);
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}
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expr_t *
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new_expr (void)
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{
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expr_t *e = calloc (1, sizeof (expr_t));
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e->line = pr_source_line;
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e->file = s_file;
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return e;
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}
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expr_t *
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new_label_expr (void)
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{
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static int label = 0;
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int lnum = ++label;
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const char *fname = current_func->def->name;
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expr_t *l = new_expr ();
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l->type = ex_label;
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l->e.label.name = malloc (1 + strlen (fname) + 1 + ceil (log10 (lnum)) + 1);
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sprintf (l->e.label.name, "$%s_%d", fname, lnum);
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return l;
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}
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expr_t *
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new_block_expr (void)
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{
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expr_t *b = new_expr ();
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b->type = ex_block;
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b->e.block.head = 0;
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b->e.block.tail = &b->e.block.head;
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return b;
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}
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expr_t *
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new_binary_expr (int op, expr_t *e1, expr_t *e2)
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{
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expr_t *e = new_expr ();
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e->type = ex_expr;
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e->e.expr.op = op;
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e->e.expr.e1 = e1;
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e->e.expr.e2 = e2;
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return e;
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}
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expr_t *
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new_unary_expr (int op, expr_t *e1)
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{
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expr_t *e = new_expr ();
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e->type = ex_uexpr;
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e->e.expr.op = op;
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e->e.expr.e1 = e1;
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return e;
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}
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expr_t *
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append_expr (expr_t *block, expr_t *e)
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{
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if (block->type != ex_block)
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abort ();
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if (!e)
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return block;
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*block->e.block.tail = e;
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block->e.block.tail = &e->next;
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return block;
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}
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void
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print_expr (expr_t *e)
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{
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printf (" ");
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if (!e) {
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printf ("(nil)");
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return;
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}
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switch (e->type) {
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case ex_label:
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printf ("%s", e->e.label.name);
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break;
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case ex_block:
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printf ("{\n");
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for (e = e->e.block.head; e; e = e->next) {
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print_expr (e);
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puts("");
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}
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printf ("}");
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break;
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case ex_expr:
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print_expr (e->e.expr.e1);
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if (e->e.expr.op == 'c') {
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expr_t *p = e->e.expr.e2;
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printf ("(");
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while (p) {
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print_expr (p);
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if (p->next)
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printf (",");
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p = p->next;
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}
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printf (")");
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} else {
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print_expr (e->e.expr.e2);
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if (isprint (e->e.expr.op)) {
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printf (" %c", e->e.expr.op);
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} else {
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printf (" %d", e->e.expr.op);
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}
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}
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break;
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case ex_uexpr:
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print_expr (e->e.expr.e1);
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if (isprint (e->e.expr.op)) {
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printf (" u%c", e->e.expr.op);
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} else {
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printf (" u%d", e->e.expr.op);
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}
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break;
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case ex_def:
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printf ("%s", e->e.def->name);
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break;
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case ex_int:
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printf ("%d", e->e.int_val);
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break;
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case ex_float:
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printf ("%g", e->e.float_val);
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break;
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case ex_string:
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printf ("\"%s\"", e->e.string_val);
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break;
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case ex_vector:
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printf ("'%g", e->e.vector_val[0]);
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printf ( " %g", e->e.vector_val[1]);
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printf ( " %g'", e->e.vector_val[2]);
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break;
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case ex_quaternion:
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printf ("'%g", e->e.quaternion_val[0]);
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printf (" %g", e->e.quaternion_val[1]);
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printf (" %g", e->e.quaternion_val[2]);
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printf (" %g'", e->e.quaternion_val[3]);
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break;
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}
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}
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static expr_t *
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do_op_string (int op, expr_t *e1, expr_t *e2)
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{
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int len;
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char *buf;
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char *s1, *s2;
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s1 = e1->e.string_val;
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s2 = e2->e.string_val;
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switch (op) {
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case '+':
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len = strlen (s1) + strlen (s2) + 1;
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buf = malloc (len);
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strcpy (buf, s1);
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strcat (buf, s2);
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e1->e.string_val = buf;
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break;
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case LT:
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e1->type = ex_int;
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e1->e.int_val = strcmp (s1, s2) < 0;
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break;
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case GT:
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e1->type = ex_int;
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e1->e.int_val = strcmp (s1, s2) > 0;
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break;
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case LE:
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e1->type = ex_int;
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e1->e.int_val = strcmp (s1, s2) <= 0;
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break;
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case GE:
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e1->type = ex_int;
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e1->e.int_val = strcmp (s1, s2) >= 0;
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break;
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case EQ:
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e1->type = ex_int;
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e1->e.int_val = strcmp (s1, s2) == 0;
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break;
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case NE:
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e1->type = ex_int;
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e1->e.int_val = strcmp (s1, s2) != 0;
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break;
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default:
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return error (e1, "invalid operand for string");
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}
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return e1;
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}
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static expr_t *
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do_op_float (int op, expr_t *e1, expr_t *e2)
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{
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float f1, f2;
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f1 = e1->e.float_val;
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f2 = e2->e.float_val;
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switch (op) {
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case '+':
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e1->e.float_val += f2;
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break;
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case '-':
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e1->e.float_val -= f2;
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break;
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case '*':
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e1->e.float_val *= f2;
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break;
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case '/':
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e1->e.float_val /= f2;
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break;
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case '&':
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e1->e.float_val = (int)f1 & (int)f2;
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break;
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case '|':
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e1->e.float_val += (int)f1 | (int)f2;
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break;
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case AND:
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e1->e.float_val = f1 && f2;
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break;
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case OR:
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e1->e.float_val += f1 || f2;
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break;
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case LT:
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e1->type = ex_int;
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e1->e.int_val = f1 < f2;
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break;
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case GT:
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e1->type = ex_int;
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e1->e.int_val = f1 > f2;
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break;
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case LE:
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e1->type = ex_int;
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e1->e.int_val = f1 <= f2;
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break;
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case GE:
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e1->type = ex_int;
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e1->e.int_val = f1 >= f2;
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break;
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case EQ:
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e1->type = ex_int;
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e1->e.int_val = f1 == f2;
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break;
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case NE:
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e1->type = ex_int;
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e1->e.int_val = f1 != f2;
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break;
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default:
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return error (e1, "invalid operand for string");
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}
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return e1;
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}
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static expr_t *
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do_op_vector (int op, expr_t *e1, expr_t *e2)
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{
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float *v1, *v2;
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v1 = e1->e.vector_val;
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v2 = e2->e.vector_val;
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switch (op) {
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case '+':
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VectorAdd (v1, v2, v1);
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break;
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case '-':
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VectorSubtract (v1, v2, v1);
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break;
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case '*':
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e1->type = ex_float;
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e1->e.float_val = DotProduct (v1, v2);
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break;
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case EQ:
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e1->type = ex_int;
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e1->e.int_val = (v1[0] == v2[0])
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&& (v1[1] == v2[1])
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&& (v1[2] == v2[2]);
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break;
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case NE:
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e1->type = ex_int;
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e1->e.int_val = (v1[0] == v2[0])
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|| (v1[1] != v2[1])
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|| (v1[2] != v2[2]);
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break;
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default:
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return error (e1, "invalid operand for string");
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}
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return e1;
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}
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static expr_t *
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do_op_huh (int op, expr_t *e1, expr_t *e2)
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{
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return error (e1, "funny constant");
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}
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static expr_t *(*do_op[]) (int op, expr_t *e1, expr_t *e2) = {
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do_op_huh,
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do_op_string,
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do_op_float,
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do_op_vector,
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do_op_huh,
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do_op_huh,
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do_op_huh,
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do_op_huh,
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};
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static expr_t *
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binary_const (int op, expr_t *e1, expr_t *e2)
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{
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etype_t t1, t2;
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//expr_t *e;
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t1 = get_type (e1);
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t2 = get_type (e2);
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if (t1 == t2) {
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return do_op[t1](op, e1, e2);
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} else {
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return type_mismatch (e1, e2, op);
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}
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}
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static expr_t *
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field_expr (expr_t *e1, expr_t *e2)
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{
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etype_t t1, t2;
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expr_t *e;
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t1 = get_type (e1);
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t2 = get_type (e2);
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if (t1 != ev_entity || t2 != ev_field) {
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return error (e1, "type missmatch for .");
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}
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e = new_binary_expr ('.', e1, e2);
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e->e.expr.type = (e2->type == ex_def)
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? e2->e.def->type->aux_type
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: e2->e.expr.type;
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return e;
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}
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expr_t *
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binary_expr (int op, expr_t *e1, expr_t *e2)
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{
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etype_t t1, t2;
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if (op == '.')
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return field_expr (e1, e2);
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if (e1->type >= ex_int && e2->type >= ex_int)
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return binary_const (op, e1, e2);
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if ((op == '&' || op == '|')
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&& e1->type == ex_uexpr && e1->e.expr.op == '!' && !e1->paren) {
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warning (e1, "ambiguous logic. Suggest explicit parentheses with expressions involving ! and %c", op);
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}
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t1 = get_type (e1);
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t2 = get_type (e2);
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if (t1 == ev_void || t2 == ev_void) {
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|
error (e1, "internal error");
|
|
abort ();
|
|
}
|
|
|
|
if (t1 == t2) {
|
|
expr_t *e = new_binary_expr (op, e1, e2);
|
|
if ((op >= OR && op <= GT) || (op == '*' && t1 == ev_vector))
|
|
e->e.expr.type = &type_float;
|
|
else
|
|
e->e.expr.type = types[t1];
|
|
if (op == '=' && e1->type == ex_expr && e1->e.expr.op == '.') {
|
|
e1->e.expr.type = &type_pointer;
|
|
}
|
|
return e;
|
|
} else {
|
|
switch (t1) {
|
|
case ev_float:
|
|
if (t2 == ev_vector) {
|
|
expr_t *e = new_binary_expr (op, e1, e2);
|
|
e->e.expr.type = &type_vector;
|
|
return e;
|
|
} else {
|
|
goto type_mismatch;
|
|
}
|
|
case ev_vector:
|
|
if (t2 == ev_float) {
|
|
expr_t *e = new_binary_expr (op, e1, e2);
|
|
e->e.expr.type = &type_vector;
|
|
return e;
|
|
} else {
|
|
goto type_mismatch;
|
|
}
|
|
case ev_field:
|
|
if (e1->e.expr.type->aux_type->type == t2) {
|
|
expr_t *e = new_binary_expr (op, e1, e2);
|
|
e->e.expr.type = e->e.expr.type->aux_type;
|
|
return e;
|
|
} else {
|
|
goto type_mismatch;
|
|
}
|
|
default:
|
|
type_mismatch:
|
|
return type_mismatch (e1, e2, op);
|
|
}
|
|
}
|
|
}
|
|
|
|
expr_t *
|
|
unary_expr (int op, expr_t *e)
|
|
{
|
|
switch (op) {
|
|
case '-':
|
|
switch (e->type) {
|
|
case ex_label:
|
|
case ex_block:
|
|
abort ();
|
|
case ex_uexpr:
|
|
if (e->e.expr.op == '-')
|
|
return e->e.expr.e1;
|
|
case ex_expr:
|
|
case ex_def:
|
|
{
|
|
expr_t *n = new_unary_expr (op, e);
|
|
n->e.expr.type = (e->type == ex_def)
|
|
? e->e.def->type
|
|
: e->e.expr.type;
|
|
return n;
|
|
}
|
|
case ex_int:
|
|
e->e.int_val *= -1;
|
|
return e;
|
|
case ex_float:
|
|
e->e.float_val *= -1;
|
|
return e;
|
|
case ex_string:
|
|
return error (e, "invalid type for unary -");
|
|
case ex_vector:
|
|
e->e.vector_val[0] *= -1;
|
|
e->e.vector_val[1] *= -1;
|
|
e->e.vector_val[2] *= -1;
|
|
return e;
|
|
case ex_quaternion:
|
|
e->e.quaternion_val[0] *= -1;
|
|
e->e.quaternion_val[1] *= -1;
|
|
e->e.quaternion_val[2] *= -1;
|
|
e->e.quaternion_val[3] *= -1;
|
|
return e;
|
|
}
|
|
break;
|
|
case '!':
|
|
switch (e->type) {
|
|
case ex_label:
|
|
case ex_block:
|
|
abort ();
|
|
case ex_uexpr:
|
|
case ex_expr:
|
|
case ex_def:
|
|
{
|
|
expr_t *n = new_unary_expr (op, e);
|
|
n->e.expr.type = &type_float;
|
|
return n;
|
|
}
|
|
case ex_int:
|
|
e->e.int_val = !e->e.int_val;
|
|
return e;
|
|
case ex_float:
|
|
e->e.int_val = !e->e.float_val;
|
|
e->type = ex_int;
|
|
return e;
|
|
case ex_string:
|
|
e->e.int_val = !e->e.string_val || !e->e.string_val[0];
|
|
e->type = ex_int;
|
|
return e;
|
|
case ex_vector:
|
|
e->e.int_val = !e->e.vector_val[0]
|
|
&& !e->e.vector_val[1]
|
|
&& !e->e.vector_val[2];
|
|
e->type = ex_int;
|
|
return e;
|
|
case ex_quaternion:
|
|
e->e.int_val = !e->e.quaternion_val[0]
|
|
&& !e->e.quaternion_val[1]
|
|
&& !e->e.quaternion_val[2]
|
|
&& !e->e.quaternion_val[3];
|
|
e->type = ex_int;
|
|
return e;
|
|
}
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
error (e, "internal error");
|
|
abort ();
|
|
}
|
|
|
|
expr_t *
|
|
function_expr (expr_t *e1, expr_t *e2)
|
|
{
|
|
etype_t t1;
|
|
expr_t *e;
|
|
int parm_count = 0;
|
|
type_t *ftype;
|
|
|
|
t1 = get_type (e1);
|
|
|
|
if (t1 != ev_func) {
|
|
if (e1->type == ex_def)
|
|
return error (e1, "Called object \"%s\" is not a function",
|
|
e1->e.def->name);
|
|
else
|
|
return error (e1, "Called object is not a function");
|
|
}
|
|
|
|
ftype = e1->type == ex_def
|
|
? e1->e.def->type
|
|
: e1->e.expr.type;
|
|
|
|
for (e = e2; e; e = e->next)
|
|
parm_count++;
|
|
if (parm_count > 8) {
|
|
return error (e1, "more than 8 parameters");
|
|
}
|
|
if (ftype->num_parms != -1) {
|
|
if (parm_count > ftype->num_parms) {
|
|
return error (e1, "too many arguments");
|
|
} else if (parm_count < ftype->num_parms) {
|
|
return error (e1, "too few arguments");
|
|
}
|
|
}
|
|
e = new_binary_expr ('c', e1, e2);
|
|
e->e.expr.type = ftype->aux_type;
|
|
return e;
|
|
}
|
|
|
|
def_t *
|
|
emit_statement (opcode_t *op, def_t *var_a, def_t *var_b, def_t *var_c)
|
|
{
|
|
dstatement_t *statement;
|
|
def_t *ret;
|
|
|
|
statement = &statements[numstatements];
|
|
numstatements++;
|
|
statement_linenums[statement - statements] = pr_source_line;
|
|
statement->op = op->opcode;
|
|
statement->a = var_a ? var_a->ofs : 0;
|
|
statement->b = var_b ? var_b->ofs : 0;
|
|
if (op->type_c == &def_void || op->right_associative) {
|
|
// ifs, gotos, and assignments don't need vars allocated
|
|
var_c = NULL;
|
|
statement->c = 0;
|
|
ret = var_a;
|
|
} else { // allocate result space
|
|
if (!var_c)
|
|
var_c = PR_GetTempDef (op->type_c->type, pr_scope);
|
|
statement->c = var_c->ofs;
|
|
ret = var_c;
|
|
}
|
|
PR_AddStatementRef (var_a, statement, 0);
|
|
PR_AddStatementRef (var_b, statement, 1);
|
|
PR_AddStatementRef (var_c, statement, 2);
|
|
|
|
if (op->right_associative)
|
|
return var_a;
|
|
return var_c;
|
|
}
|
|
|
|
def_t *emit_sub_expr (expr_t *e, def_t *dest);
|
|
|
|
void
|
|
emit_branch (opcode_t *op, expr_t *e, expr_t *l)
|
|
{
|
|
dstatement_t *st;
|
|
statref_t *ref;
|
|
def_t *def = 0;
|
|
|
|
if (e)
|
|
def = emit_sub_expr (e, 0);
|
|
st = &statements[numstatements];
|
|
emit_statement (op, def, 0, 0);
|
|
if (l->e.label.statement) {
|
|
if (op == op_goto)
|
|
st->a = l->e.label.statement - st;
|
|
else
|
|
st->b = l->e.label.statement - st;
|
|
} else {
|
|
ref = PR_NewStatref (st, op != op_goto);
|
|
ref->next = l->e.label.refs;
|
|
l->e.label.refs = ref;
|
|
}
|
|
}
|
|
|
|
def_t *
|
|
emit_function_call (expr_t *e, def_t *dest)
|
|
{
|
|
def_t *func = emit_sub_expr (e->e.expr.e1, 0);
|
|
def_t parm;
|
|
def_t *arg;
|
|
expr_t *earg;
|
|
opcode_t *op;
|
|
int count = 0, ind;
|
|
|
|
for (earg = e->e.expr.e2; earg; earg = earg->next)
|
|
count++;
|
|
ind = count;
|
|
for (earg = e->e.expr.e2; earg; earg = earg->next) {
|
|
ind--;
|
|
parm = def_parms[ind];
|
|
parm.type = types[get_type (earg)];
|
|
arg = emit_sub_expr (earg, &parm);
|
|
if (earg->type != ex_expr) {
|
|
op = PR_Opcode_Find ("=", 5, arg, &parm, &parm);
|
|
emit_statement (op, arg, &parm, 0);
|
|
}
|
|
}
|
|
op = PR_Opcode_Find (va ("<CALL%d>", count), -1, &def_function, &def_void, &def_void);
|
|
emit_statement (op, func, 0, 0);
|
|
|
|
def_ret.type = func->type->aux_type;
|
|
if (dest) {
|
|
op = PR_Opcode_Find ("=", 5, dest, &def_ret, &def_ret);
|
|
emit_statement (op, &def_ret, dest, 0);
|
|
return dest;
|
|
} else {
|
|
return &def_ret;
|
|
}
|
|
}
|
|
|
|
def_t *
|
|
emit_assign_expr (expr_t *e)
|
|
{
|
|
def_t *def_a, *def_b;
|
|
opcode_t *op;
|
|
expr_t *e1 = e->e.expr.e1;
|
|
expr_t *e2 = e->e.expr.e2;
|
|
|
|
def_a = emit_sub_expr (e1, 0);
|
|
if (def_a->type == &type_pointer) {
|
|
def_b = emit_sub_expr (e2, 0);
|
|
op = PR_Opcode_Find ("=", 5, def_a, def_b, def_b);
|
|
emit_statement (op, def_b, def_a, 0);
|
|
} else {
|
|
if (def_a->initialized) {
|
|
if (options.cow) {
|
|
int size = type_size [def_a->type->type];
|
|
int ofs = PR_NewLocation (def_a->type);
|
|
memcpy (pr_globals + ofs, pr_globals + def_a->ofs, size);
|
|
def_a->ofs = ofs;
|
|
def_a->initialized = 0;
|
|
warning (e1, "assignment to constant %s", def_a->name);
|
|
} else {
|
|
error (e1, "assignment to constant %s", def_a->name);
|
|
}
|
|
}
|
|
if (e2->type == ex_expr) {
|
|
def_b = emit_sub_expr (e2, def_a);
|
|
} else {
|
|
def_b = emit_sub_expr (e2, 0);
|
|
op = PR_Opcode_Find ("=", 5, def_a, def_b, def_b);
|
|
emit_statement (op, def_b, def_a, 0);
|
|
}
|
|
}
|
|
return def_b;
|
|
}
|
|
|
|
def_t *
|
|
emit_sub_expr (expr_t *e, def_t *dest)
|
|
{
|
|
opcode_t *op;
|
|
char *operator;
|
|
def_t *def_a, *def_b;
|
|
int priority;
|
|
|
|
switch (e->type) {
|
|
default:
|
|
case ex_label:
|
|
case ex_block:
|
|
abort ();
|
|
case ex_expr:
|
|
if (e->e.expr.op == 'c')
|
|
return emit_function_call (e, dest);
|
|
if (e->e.expr.op == '=')
|
|
return emit_assign_expr (e);
|
|
def_a = emit_sub_expr (e->e.expr.e1, 0);
|
|
def_b = emit_sub_expr (e->e.expr.e2, 0);
|
|
switch (e->e.expr.op) {
|
|
case AND:
|
|
operator = "&&";
|
|
priority = 6;
|
|
break;
|
|
case OR:
|
|
operator = "||";
|
|
priority = 6;
|
|
break;
|
|
case EQ:
|
|
operator = "==";
|
|
priority = 4;
|
|
break;
|
|
case NE:
|
|
operator = "!=";
|
|
priority = 4;
|
|
break;
|
|
case LE:
|
|
operator = "<=";
|
|
priority = 4;
|
|
break;
|
|
case GE:
|
|
operator = ">=";
|
|
priority = 4;
|
|
break;
|
|
case LT:
|
|
operator = "<";
|
|
priority = 4;
|
|
break;
|
|
case GT:
|
|
operator = ">";
|
|
priority = 4;
|
|
break;
|
|
case '+':
|
|
operator = "+";
|
|
priority = 3;
|
|
break;
|
|
case '-':
|
|
operator = "-";
|
|
priority = 3;
|
|
break;
|
|
case '*':
|
|
operator = "*";
|
|
priority = 2;
|
|
break;
|
|
case '/':
|
|
operator = "/";
|
|
priority = 2;
|
|
break;
|
|
case '&':
|
|
operator = "&";
|
|
priority = 2;
|
|
break;
|
|
case '|':
|
|
operator = "|";
|
|
priority = 2;
|
|
break;
|
|
case '.':
|
|
operator = ".";
|
|
priority = 1;
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
if (!dest)
|
|
dest = PR_GetTempDef (e->e.expr.type, pr_scope);
|
|
op = PR_Opcode_Find (operator, priority, def_a, def_b, dest);
|
|
return emit_statement (op, def_a, def_b, dest);
|
|
case ex_uexpr:
|
|
if (e->e.expr.op == '!') {
|
|
operator = "!";
|
|
priority = -1;
|
|
def_a = emit_sub_expr (e->e.expr.e1, 0);
|
|
def_b = &def_void;
|
|
} else if (e->e.expr.op == '-') {
|
|
static expr_t zero;
|
|
|
|
zero.type = expr_types[get_type (e->e.expr.e1)];
|
|
|
|
operator = "-";
|
|
priority = 3;
|
|
def_a = PR_ReuseConstant (&zero, 0);
|
|
def_b = emit_sub_expr (e->e.expr.e1, 0);
|
|
} else {
|
|
abort ();
|
|
}
|
|
op = PR_Opcode_Find (operator, priority, def_a, def_b, dest);
|
|
return emit_statement (op, def_a, def_b, dest);
|
|
case ex_def:
|
|
return e->e.def;
|
|
case ex_int:
|
|
case ex_float:
|
|
case ex_string:
|
|
case ex_vector:
|
|
case ex_quaternion:
|
|
return PR_ReuseConstant (e, 0);
|
|
}
|
|
}
|
|
|
|
void
|
|
emit_expr (expr_t *e)
|
|
{
|
|
def_t *def;
|
|
def_t *def_a;
|
|
def_t *def_b;
|
|
statref_t *ref;
|
|
label_t *label;
|
|
//opcode_t *op;
|
|
|
|
switch (e->type) {
|
|
case ex_label:
|
|
label = &e->e.label;
|
|
label->statement = &statements[numstatements];
|
|
for (ref = label->refs; ref; ref = ref->next) {
|
|
switch (ref->field) {
|
|
case 0:
|
|
ref->statement->a = label->statement - ref->statement;
|
|
break;
|
|
case 1:
|
|
ref->statement->b = label->statement - ref->statement;
|
|
break;
|
|
case 2:
|
|
ref->statement->c = label->statement - ref->statement;
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
break;
|
|
case ex_block:
|
|
for (e = e->e.block.head; e; e = e->next)
|
|
emit_expr (e);
|
|
break;
|
|
case ex_expr:
|
|
switch (e->e.expr.op) {
|
|
case '=':
|
|
emit_assign_expr (e);
|
|
break;
|
|
case 'n':
|
|
emit_branch (op_ifnot, e->e.expr.e1, e->e.expr.e2);
|
|
break;
|
|
case 'i':
|
|
emit_branch (op_if, e->e.expr.e1, e->e.expr.e2);
|
|
break;
|
|
case 'c':
|
|
emit_function_call (e, 0);
|
|
break;
|
|
case 's':
|
|
def_a = emit_sub_expr (e->e.expr.e1, 0);
|
|
def_b = emit_sub_expr (e->e.expr.e2, 0);
|
|
emit_statement (op_state, def_a, def_b, 0);
|
|
break;
|
|
default:
|
|
warning (e, "Ignoring useless expression");
|
|
break;
|
|
}
|
|
break;
|
|
case ex_uexpr:
|
|
switch (e->e.expr.op) {
|
|
case 'r':
|
|
def = 0;
|
|
if (e->e.expr.e1)
|
|
def = emit_sub_expr (e->e.expr.e1, 0);
|
|
PR_Statement (op_return, def, 0);
|
|
break;
|
|
case 'g':
|
|
emit_branch (op_goto, 0, e->e.expr.e1);
|
|
break;
|
|
default:
|
|
warning (e, "Ignoring useless expression");
|
|
emit_expr (e->e.expr.e1);
|
|
break;
|
|
}
|
|
break;
|
|
case ex_def:
|
|
case ex_int:
|
|
case ex_float:
|
|
case ex_string:
|
|
case ex_vector:
|
|
case ex_quaternion:
|
|
warning (e, "Ignoring useless expression");
|
|
break;
|
|
}
|
|
PR_FreeTempDefs ();
|
|
}
|