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quakespasm/source/pr_exec.c
unknown 1556256c74 Initial commit
2022-02-08 14:06:54 -05:00

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/*
Copyright (C) 1996-2001 Id Software, Inc.
Copyright (C) 2010-2014 QuakeSpasm developers
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "quakedef.h"
typedef struct
{
int s;
dfunction_t *f;
} prstack_t;
#define MAX_STACK_DEPTH 64 /* was 32 */
static prstack_t pr_stack[MAX_STACK_DEPTH];
static int pr_depth;
#define LOCALSTACK_SIZE 2048
static int localstack[LOCALSTACK_SIZE];
static int localstack_used;
qboolean pr_trace;
dfunction_t *pr_xfunction;
int pr_xstatement;
int pr_argc;
static const 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"
};
const char *PR_GlobalString (int ofs);
const char *PR_GlobalStringNoContents (int ofs);
//=============================================================================
/*
=================
PR_PrintStatement
=================
*/
static void PR_PrintStatement (dstatement_t *s)
{
int i;
if ((unsigned int)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 %i", PR_GlobalString(s->a), s->b);
else if (s->op == OP_GOTO)
{
Con_Printf("branch %i", s->a);
}
else if ((unsigned int)(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
============
*/
static void PR_StackTrace (void)
{
int i;
dfunction_t *f;
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_GetString(f->s_file), PR_GetString(f->s_name));
}
}
}
/*
============
PR_Profile_f
============
*/
void PR_Profile_f (void)
{
int i, num;
int pmax;
dfunction_t *f, *best;
if (!sv.active)
return;
num = 0;
do
{
pmax = 0;
best = NULL;
for (i = 0; i < progs->numfunctions; i++)
{
f = &pr_functions[i];
if (f->profile > pmax)
{
pmax = f->profile;
best = f;
}
}
if (best)
{
if (num < 10)
Con_Printf("%7i %s\n", best->profile, PR_GetString(best->s_name));
num++;
best->profile = 0;
}
} while (best);
}
/*
============
PR_RunError
Aborts the currently executing function
============
*/
void PR_RunError (const char *error, ...)
{
va_list argptr;
char string[1024];
va_start (argptr, error);
q_vsnprintf (string, sizeof(string), error, argptr);
va_end (argptr);
PR_PrintStatement(pr_statements + pr_xstatement);
PR_StackTrace();
Con_Printf("%s\n", string);
pr_depth = 0; // dump the stack so host_error can shutdown functions
Host_Error("Program error");
}
/*
====================
PR_EnterFunction
Returns the new program statement counter
====================
*/
static 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
====================
*/
static int PR_LeaveFunction (void)
{
int i, c;
if (pr_depth <= 0)
Host_Error("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");
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
The interpretation main loop
====================
*/
#define OPA ((eval_t *)&pr_globals[(unsigned short)st->a])
#define OPB ((eval_t *)&pr_globals[(unsigned short)st->b])
#define OPC ((eval_t *)&pr_globals[(unsigned short)st->c])
void PR_ExecuteProgram (func_t fnum)
{
eval_t *ptr;
dstatement_t *st;
dfunction_t *f, *newf;
int profile, startprofile;
edict_t *ed;
int exitdepth;
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];
pr_trace = false;
// make a stack frame
exitdepth = pr_depth;
st = &pr_statements[PR_EnterFunction(f)];
startprofile = profile = 0;
while (1)
{
st++; /* next statement */
if (++profile > 100000)
{
pr_xstatement = st - pr_statements;
PR_RunError("runaway loop error");
}
if (pr_trace)
PR_PrintStatement(st);
switch (st->op)
{
case OP_ADD_F:
OPC->_float = OPA->_float + OPB->_float;
break;
case OP_ADD_V:
OPC->vector[0] = OPA->vector[0] + OPB->vector[0];
OPC->vector[1] = OPA->vector[1] + OPB->vector[1];
OPC->vector[2] = OPA->vector[2] + OPB->vector[2];
break;
case OP_SUB_F:
OPC->_float = OPA->_float - OPB->_float;
break;
case OP_SUB_V:
OPC->vector[0] = OPA->vector[0] - OPB->vector[0];
OPC->vector[1] = OPA->vector[1] - OPB->vector[1];
OPC->vector[2] = OPA->vector[2] - OPB->vector[2];
break;
case OP_MUL_F:
OPC->_float = OPA->_float * OPB->_float;
break;
case OP_MUL_V:
OPC->_float = OPA->vector[0] * OPB->vector[0] +
OPA->vector[1] * OPB->vector[1] +
OPA->vector[2] * OPB->vector[2];
break;
case OP_MUL_FV:
OPC->vector[0] = OPA->_float * OPB->vector[0];
OPC->vector[1] = OPA->_float * OPB->vector[1];
OPC->vector[2] = OPA->_float * OPB->vector[2];
break;
case OP_MUL_VF:
OPC->vector[0] = OPB->_float * OPA->vector[0];
OPC->vector[1] = OPB->_float * OPA->vector[1];
OPC->vector[2] = OPB->_float * OPA->vector[2];
break;
case OP_DIV_F:
OPC->_float = OPA->_float / OPB->_float;
break;
case OP_BITAND:
OPC->_float = (int)OPA->_float & (int)OPB->_float;
break;
case OP_BITOR:
OPC->_float = (int)OPA->_float | (int)OPB->_float;
break;
case OP_GE:
OPC->_float = OPA->_float >= OPB->_float;
break;
case OP_LE:
OPC->_float = OPA->_float <= OPB->_float;
break;
case OP_GT:
OPC->_float = OPA->_float > OPB->_float;
break;
case OP_LT:
OPC->_float = OPA->_float < OPB->_float;
break;
case OP_AND:
OPC->_float = OPA->_float && OPB->_float;
break;
case OP_OR:
OPC->_float = OPA->_float || OPB->_float;
break;
case OP_NOT_F:
OPC->_float = !OPA->_float;
break;
case OP_NOT_V:
OPC->_float = !OPA->vector[0] && !OPA->vector[1] && !OPA->vector[2];
break;
case OP_NOT_S:
OPC->_float = !OPA->string || !*PR_GetString(OPA->string);
break;
case OP_NOT_FNC:
OPC->_float = !OPA->function;
break;
case OP_NOT_ENT:
OPC->_float = (PROG_TO_EDICT(OPA->edict) == sv.edicts);
break;
case OP_EQ_F:
OPC->_float = OPA->_float == OPB->_float;
break;
case OP_EQ_V:
OPC->_float = (OPA->vector[0] == OPB->vector[0]) &&
(OPA->vector[1] == OPB->vector[1]) &&
(OPA->vector[2] == OPB->vector[2]);
break;
case OP_EQ_S:
OPC->_float = !strcmp(PR_GetString(OPA->string), PR_GetString(OPB->string));
break;
case OP_EQ_E:
OPC->_float = OPA->_int == OPB->_int;
break;
case OP_EQ_FNC:
OPC->_float = OPA->function == OPB->function;
break;
case OP_NE_F:
OPC->_float = OPA->_float != OPB->_float;
break;
case OP_NE_V:
OPC->_float = (OPA->vector[0] != OPB->vector[0]) ||
(OPA->vector[1] != OPB->vector[1]) ||
(OPA->vector[2] != OPB->vector[2]);
break;
case OP_NE_S:
OPC->_float = strcmp(PR_GetString(OPA->string), PR_GetString(OPB->string));
break;
case OP_NE_E:
OPC->_float = OPA->_int != OPB->_int;
break;
case OP_NE_FNC:
OPC->_float = OPA->function != OPB->function;
break;
case OP_STORE_F:
case OP_STORE_ENT:
case OP_STORE_FLD: // integers
case OP_STORE_S:
case OP_STORE_FNC: // pointers
OPB->_int = OPA->_int;
break;
case OP_STORE_V:
OPB->vector[0] = OPA->vector[0];
OPB->vector[1] = OPA->vector[1];
OPB->vector[2] = OPA->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 + OPB->_int);
ptr->_int = OPA->_int;
break;
case OP_STOREP_V:
ptr = (eval_t *)((byte *)sv.edicts + OPB->_int);
ptr->vector[0] = OPA->vector[0];
ptr->vector[1] = OPA->vector[1];
ptr->vector[2] = OPA->vector[2];
break;
case OP_ADDRESS:
ed = PROG_TO_EDICT(OPA->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_xstatement = st - pr_statements;
PR_RunError("assignment to world entity");
}
OPC->_int = (byte *)((int *)&ed->v + OPB->_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(OPA->edict);
#ifdef PARANOID
NUM_FOR_EDICT(ed); // Make sure it's in range
#endif
OPC->_int = ((eval_t *)((int *)&ed->v + OPB->_int))->_int;
break;
case OP_LOAD_V:
ed = PROG_TO_EDICT(OPA->edict);
#ifdef PARANOID
NUM_FOR_EDICT(ed); // Make sure it's in range
#endif
ptr = (eval_t *)((int *)&ed->v + OPB->_int);
OPC->vector[0] = ptr->vector[0];
OPC->vector[1] = ptr->vector[1];
OPC->vector[2] = ptr->vector[2];
break;
case OP_IFNOT:
if (!OPA->_int)
st += st->b - 1; /* -1 to offset the st++ */
break;
case OP_IF:
if (OPA->_int)
st += st->b - 1; /* -1 to offset the st++ */
break;
case OP_GOTO:
st += st->a - 1; /* -1 to offset the st++ */
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_xfunction->profile += profile - startprofile;
startprofile = profile;
pr_xstatement = st - pr_statements;
pr_argc = st->op - OP_CALL0;
if (!OPA->function)
PR_RunError("NULL function");
newf = &pr_functions[OPA->function];
if (newf->first_statement < 0)
{ // Built-in function
int i = -newf->first_statement;
if (i >= pr_numbuiltins)
PR_RunError("Bad builtin call number %d", i);
pr_builtins[i]();
break;
}
// Normal function
st = &pr_statements[PR_EnterFunction(newf)];
break;
case OP_DONE:
case OP_RETURN:
pr_xfunction->profile += profile - startprofile;
startprofile = profile;
pr_xstatement = st - pr_statements;
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];
st = &pr_statements[PR_LeaveFunction()];
if (pr_depth == exitdepth)
{ // Done
return;
}
break;
case OP_STATE:
ed = PROG_TO_EDICT(pr_global_struct->self);
ed->v.nextthink = pr_global_struct->time + 0.1;
ed->v.frame = OPA->_float;
ed->v.think = OPB->function;
break;
default:
pr_xstatement = st - pr_statements;
PR_RunError("Bad opcode %i", st->op);
}
} /* end of while(1) loop */
}
#undef OPA
#undef OPB
#undef OPC
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