ref: 86d9d6b63def9020078dc2b1796ed0eb2022d8f1
dir: /pr_exec.c/
#include <u.h>
#include <libc.h>
#include "dat.h"
#include "quakedef.h"
#include "fns.h"
typedef struct
{
int s;
dfunction_t *f;
} prstack_t;
#define MAX_STACK_DEPTH 2048
static prstack_t pr_stack[MAX_STACK_DEPTH];
static int pr_depth;
#define LOCALSTACK_SIZE 32768
static int localstack[LOCALSTACK_SIZE];
static int localstack_used;
qboolean pr_trace;
dfunction_t *pr_xfunction;
int pr_xstatement;
int pr_argc;
char *pr_opnames[] =
{
"DONE",
"MUL_F",
"MUL_V",
"MUL_FV",
"MUL_VF",
"DIV",
"ADD_F",
"ADD_V",
"SUB_F",
"SUB_V",
"EQ_F",
"EQ_V",
"EQ_S",
"EQ_E",
"EQ_FNC",
"NE_F",
"NE_V",
"NE_S",
"NE_E",
"NE_FNC",
"LE",
"GE",
"LT",
"GT",
"INDIRECT",
"INDIRECT",
"INDIRECT",
"INDIRECT",
"INDIRECT",
"INDIRECT",
"ADDRESS",
"STORE_F",
"STORE_V",
"STORE_S",
"STORE_ENT",
"STORE_FLD",
"STORE_FNC",
"STOREP_F",
"STOREP_V",
"STOREP_S",
"STOREP_ENT",
"STOREP_FLD",
"STOREP_FNC",
"RETURN",
"NOT_F",
"NOT_V",
"NOT_S",
"NOT_ENT",
"NOT_FNC",
"IF",
"IFNOT",
"CALL0",
"CALL1",
"CALL2",
"CALL3",
"CALL4",
"CALL5",
"CALL6",
"CALL7",
"CALL8",
"STATE",
"GOTO",
"AND",
"OR",
"BITAND",
"BITOR"
};
char *PR_GlobalString (int ofs);
char *PR_GlobalStringNoContents (int ofs);
//=============================================================================
/*
=================
PR_PrintStatement
=================
*/
void PR_PrintStatement (dstatement_t *s)
{
int i;
if ( (unsigned)s->op < sizeof(pr_opnames)/sizeof(pr_opnames[0]))
{
Con_Printf ("%s ", pr_opnames[s->op]);
i = strlen(pr_opnames[s->op]);
for ( ; i<10 ; i++)
Con_Printf (" ");
}
if (s->op == OP_IF || s->op == OP_IFNOT)
Con_Printf ("%sbranch %d",PR_GlobalString(s->a),s->b);
else if (s->op == OP_GOTO)
{
Con_Printf ("branch %d",s->a);
}
else if ( (unsigned)(s->op - OP_STORE_F) < 6)
{
Con_Printf ("%s",PR_GlobalString(s->a));
Con_Printf ("%s", PR_GlobalStringNoContents(s->b));
}
else
{
if (s->a)
Con_Printf ("%s",PR_GlobalString(s->a));
if (s->b)
Con_Printf ("%s",PR_GlobalString(s->b));
if (s->c)
Con_Printf ("%s", PR_GlobalStringNoContents(s->c));
}
Con_Printf ("\n");
}
/*
============
PR_StackTrace
============
*/
void PR_StackTrace (void)
{
dfunction_t *f;
int i;
if (pr_depth == 0)
{
Con_Printf ("<NO STACK>\n");
return;
}
pr_stack[pr_depth].f = pr_xfunction;
for (i=pr_depth ; i>=0 ; i--)
{
f = pr_stack[i].f;
if (!f)
{
Con_Printf ("<NO FUNCTION>\n");
}
else
Con_Printf ("%12s : %s\n", PR_Str(f->s_file), PR_Str(f->s_name));
}
}
/*
============
PR_Profile_f
============
*/
void PR_Profile_f (void)
{
dfunction_t *f, *best;
int max;
int num;
int i;
if (!sv.active)
return;
num = 0;
do
{
max = 0;
best = nil;
for (i=0 ; i<progs->numfunctions ; i++)
{
f = &pr_functions[i];
if (f->profile > max)
{
max = f->profile;
best = f;
}
}
if (best)
{
if (num < 10)
Con_Printf ("%7d %s\n", best->profile, PR_Str(best->s_name));
num++;
best->profile = 0;
}
} while (best);
}
/*
============
PR_RunError
Aborts the currently executing function
============
*/
void PR_RunError (char *fmt, ...)
{
va_list arg;
char s[1024];
va_start(arg, fmt);
vsnprint(s, sizeof s, fmt, arg);
va_end(arg);
PR_PrintStatement(pr_statements + pr_xstatement);
PR_StackTrace();
Con_Printf("%s\n", s);
pr_depth = 0; // dump the stack so host_error can shutdown functions
Host_Error("Program error");
}
/*
============================================================================
PR_ExecuteProgram
The interpretation main loop
============================================================================
*/
/*
====================
PR_EnterFunction
Returns the new program statement counter
====================
*/
int PR_EnterFunction (dfunction_t *f)
{
int i, j, c, o;
pr_stack[pr_depth].s = pr_xstatement;
pr_stack[pr_depth].f = pr_xfunction;
pr_depth++;
if (pr_depth >= MAX_STACK_DEPTH)
PR_RunError ("stack overflow");
// save off any locals that the new function steps on
c = f->locals;
if (localstack_used + c > LOCALSTACK_SIZE)
PR_RunError ("PR_ExecuteProgram: locals stack overflow\n");
for (i=0 ; i < c ; i++)
localstack[localstack_used+i] = ((int *)pr_globals)[f->parm_start + i];
localstack_used += c;
// copy parameters
o = f->parm_start;
for (i=0 ; i<f->numparms ; i++)
{
for (j=0 ; j<f->parm_size[i] ; j++)
{
((int *)pr_globals)[o] = ((int *)pr_globals)[OFS_PARM0+i*3+j];
o++;
}
}
pr_xfunction = f;
return f->first_statement - 1; // offset the s++
}
/*
====================
PR_LeaveFunction
====================
*/
int PR_LeaveFunction (void)
{
int i, c;
if (pr_depth <= 0)
fatal ("prog stack underflow");
// restore locals from the stack
c = pr_xfunction->locals;
localstack_used -= c;
if (localstack_used < 0)
PR_RunError ("PR_ExecuteProgram: locals stack underflow\n");
for (i=0 ; i < c ; i++)
((int *)pr_globals)[pr_xfunction->parm_start + i] = localstack[localstack_used+i];
// up stack
pr_depth--;
pr_xfunction = pr_stack[pr_depth].f;
return pr_stack[pr_depth].s;
}
/*
====================
PR_ExecuteProgram
====================
*/
void PR_ExecuteProgram (func_t fnum)
{
eval_t *a, *b, *c;
int s;
dstatement_t *st;
dfunction_t *f, *newf;
int runaway;
int i;
edict_t *ed;
int exitdepth;
eval_t *ptr;
if (!fnum || fnum >= progs->numfunctions)
{
if (pr_global_struct->self)
ED_Print (PROG_TO_EDICT(pr_global_struct->self));
Host_Error ("PR_ExecuteProgram: NULL function");
}
f = &pr_functions[fnum];
runaway = 100000;
pr_trace = false;
// make a stack frame
exitdepth = pr_depth;
s = PR_EnterFunction (f);
while (1)
{
s++; // next statement
st = &pr_statements[s];
a = (eval_t *)&pr_globals[(unsigned short)st->a];
b = (eval_t *)&pr_globals[(unsigned short)st->b];
c = (eval_t *)&pr_globals[(unsigned short)st->c];
if (!--runaway)
PR_RunError ("runaway loop error");
pr_xfunction->profile++;
pr_xstatement = s;
if (pr_trace)
PR_PrintStatement (st);
switch (st->op)
{
case OP_ADD_F:
c->_float = a->_float + b->_float;
break;
case OP_ADD_V:
c->vector[0] = a->vector[0] + b->vector[0];
c->vector[1] = a->vector[1] + b->vector[1];
c->vector[2] = a->vector[2] + b->vector[2];
break;
case OP_SUB_F:
c->_float = a->_float - b->_float;
break;
case OP_SUB_V:
c->vector[0] = a->vector[0] - b->vector[0];
c->vector[1] = a->vector[1] - b->vector[1];
c->vector[2] = a->vector[2] - b->vector[2];
break;
case OP_MUL_F:
c->_float = a->_float * b->_float;
break;
case OP_MUL_V:
c->_float = a->vector[0]*b->vector[0]
+ a->vector[1]*b->vector[1]
+ a->vector[2]*b->vector[2];
break;
case OP_MUL_FV:
c->vector[0] = a->_float * b->vector[0];
c->vector[1] = a->_float * b->vector[1];
c->vector[2] = a->_float * b->vector[2];
break;
case OP_MUL_VF:
c->vector[0] = b->_float * a->vector[0];
c->vector[1] = b->_float * a->vector[1];
c->vector[2] = b->_float * a->vector[2];
break;
case OP_DIV_F:
c->_float = a->_float / b->_float;
break;
case OP_BITAND:
c->_float = (int)a->_float & (int)b->_float;
break;
case OP_BITOR:
c->_float = (int)a->_float | (int)b->_float;
break;
case OP_GE:
c->_float = a->_float >= b->_float;
break;
case OP_LE:
c->_float = a->_float <= b->_float;
break;
case OP_GT:
c->_float = a->_float > b->_float;
break;
case OP_LT:
c->_float = a->_float < b->_float;
break;
case OP_AND:
c->_float = a->_float && b->_float;
break;
case OP_OR:
c->_float = a->_float || b->_float;
break;
case OP_NOT_F:
c->_float = !a->_float;
break;
case OP_NOT_V:
c->_float = !a->vector[0] && !a->vector[1] && !a->vector[2];
break;
case OP_NOT_S:
c->_float = !a->string || !*PR_Str(a->string);
break;
case OP_NOT_FNC:
c->_float = !a->function;
break;
case OP_NOT_ENT:
c->_float = (PROG_TO_EDICT(a->edict) == sv.edicts);
break;
case OP_EQ_F:
c->_float = a->_float == b->_float;
break;
case OP_EQ_V:
c->_float = (a->vector[0] == b->vector[0]) &&
(a->vector[1] == b->vector[1]) &&
(a->vector[2] == b->vector[2]);
break;
case OP_EQ_S:
c->_float = !strcmp(PR_Str(a->string),PR_Str(b->string));
break;
case OP_EQ_E:
c->_float = a->_int == b->_int;
break;
case OP_EQ_FNC:
c->_float = a->function == b->function;
break;
case OP_NE_F:
c->_float = a->_float != b->_float;
break;
case OP_NE_V:
c->_float = (a->vector[0] != b->vector[0]) ||
(a->vector[1] != b->vector[1]) ||
(a->vector[2] != b->vector[2]);
break;
case OP_NE_S:
c->_float = strcmp(PR_Str(a->string),PR_Str(b->string));
break;
case OP_NE_E:
c->_float = a->_int != b->_int;
break;
case OP_NE_FNC:
c->_float = a->function != b->function;
break;
//==================
case OP_STORE_F:
case OP_STORE_ENT:
case OP_STORE_FLD: // integers
case OP_STORE_S:
case OP_STORE_FNC: // pointers
b->_int = a->_int;
break;
case OP_STORE_V:
b->vector[0] = a->vector[0];
b->vector[1] = a->vector[1];
b->vector[2] = a->vector[2];
break;
case OP_STOREP_F:
case OP_STOREP_ENT:
case OP_STOREP_FLD: // integers
case OP_STOREP_S:
case OP_STOREP_FNC: // pointers
ptr = (eval_t *)((byte *)sv.edicts + b->_int);
ptr->_int = a->_int;
break;
case OP_STOREP_V:
ptr = (eval_t *)((byte *)sv.edicts + b->_int);
ptr->vector[0] = a->vector[0];
ptr->vector[1] = a->vector[1];
ptr->vector[2] = a->vector[2];
break;
case OP_ADDRESS:
ed = PROG_TO_EDICT(a->edict);
#ifdef PARANOID
NUM_FOR_EDICT(ed); // make sure it's in range
#endif
if (ed == (edict_t *)sv.edicts && sv.state == ss_active)
PR_RunError ("assignment to world entity");
c->_int = (byte *)((int *)&ed->v + b->_int) - (byte *)sv.edicts;
break;
case OP_LOAD_F:
case OP_LOAD_FLD:
case OP_LOAD_ENT:
case OP_LOAD_S:
case OP_LOAD_FNC:
ed = PROG_TO_EDICT(a->edict);
#ifdef PARANOID
NUM_FOR_EDICT(ed); // make sure it's in range
#endif
a = (eval_t *)((int *)&ed->v + b->_int);
c->_int = a->_int;
break;
case OP_LOAD_V:
ed = PROG_TO_EDICT(a->edict);
#ifdef PARANOID
NUM_FOR_EDICT(ed); // make sure it's in range
#endif
a = (eval_t *)((int *)&ed->v + b->_int);
c->vector[0] = a->vector[0];
c->vector[1] = a->vector[1];
c->vector[2] = a->vector[2];
break;
//==================
case OP_IFNOT:
if (!a->_int)
s += st->b - 1; // offset the s++
break;
case OP_IF:
if (a->_int)
s += st->b - 1; // offset the s++
break;
case OP_GOTO:
s += st->a - 1; // offset the s++
break;
case OP_CALL0:
case OP_CALL1:
case OP_CALL2:
case OP_CALL3:
case OP_CALL4:
case OP_CALL5:
case OP_CALL6:
case OP_CALL7:
case OP_CALL8:
pr_argc = st->op - OP_CALL0;
if (!a->function)
PR_RunError ("NULL function");
newf = &pr_functions[a->function];
if (newf->first_statement < 0)
{ // negative statements are built in functions
i = -newf->first_statement;
if (i >= pr_numbuiltins)
PR_RunError ("Bad builtin call number %d", i);
pr_builtins[i] ();
break;
}
s = PR_EnterFunction (newf);
break;
case OP_DONE:
case OP_RETURN:
pr_globals[OFS_RETURN] = pr_globals[(unsigned short)st->a];
pr_globals[OFS_RETURN+1] = pr_globals[(unsigned short)st->a+1];
pr_globals[OFS_RETURN+2] = pr_globals[(unsigned short)st->a+2];
s = PR_LeaveFunction ();
if (pr_depth == exitdepth)
return; // all done
break;
case OP_STATE:
ed = PROG_TO_EDICT(pr_global_struct->self);
ed->v.nextthink = pr_global_struct->time + 0.1;
if (a->_float != ed->v.frame)
{
ed->v.frame = a->_float;
}
ed->v.think = b->function;
break;
default:
PR_RunError ("Bad opcode %d", st->op);
}
}
}