fteqw/engine/qclib/execloop.h

//qc execution code.
//we have two conditions.
//one allows us to debug and trace through our code, the other doesn't.

//hopefully, the compiler will do a great job at optimising this code for us, where required.
//if it dosn't, then bum.

//the general overhead should be reduced significantly, and I would be supprised if it did run slower.

//run away loops are checked for ONLY on gotos and function calls. This might give a poorer check, but it will run faster overall.

//Appears to work fine.

#if INTSIZE == 16
#define cont cont16
#define reeval reeval16
#define st st16
#define pr_statements pr_statements16
#define fakeop fakeop16
#define dstatement_t dstatement16_t
#define sofs signed short
#define uofs unsigned short
#elif INTSIZE == 32
#define cont cont32
#define reeval reeval32
#define st st32
#define pr_statements pr_statements32
#define fakeop fakeop32
#define dstatement_t dstatement32_t
#define sofs signed int
#define uofs unsigned int
#elif INTSIZE == 24
#error INTSIZE should be set to 32.
#else
#error Bad cont size
#endif

#ifdef DEBUGABLE
#define OPCODE (progfuncs->funcs.pr_trace?(st->op & ~0x8000):st->op)
#else
#define OPCODE (st->op)
#endif

#define ENGINEPOINTER(p) ((char*)(p) - progfuncs->funcs.stringtable)
#define QCPOINTER(p) (eval_t *)(p->_int+progfuncs->funcs.stringtable)
#define QCPOINTERM(p) (eval_t *)((p)+progfuncs->funcs.stringtable)
#define QCPOINTERWRITEFAIL(p) ((unsigned int)p->_int-1 >= prinst.addressableused-1)	//disallows null writes
#define QCPOINTERREADFAIL(p) ((unsigned int)p->_int >= prinst.addressableused)		//permits null writes

//rely upon just st
{
#ifdef DEBUGABLE
cont:	//last statement may have been a breakpoint
	s = st-pr_statements;
	s+=1;

	if (prinst.watch_ptr && prinst.watch_ptr->_int != prinst.watch_old._int)
	{
		//this will fire on the next instruction after the variable got changed.
		pr_xstatement = s;
		switch(prinst.watch_type)
		{
		case ev_float:
			printf("Watch point hit in %s, \"%s\" changed from %g to %g.\n", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name), prinst.watch_name, prinst.watch_old._float, prinst.watch_ptr->_float);
			break;
		default:
			printf("Watch point hit in %s, \"%s\" changed from %i to %i.\n", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name), prinst.watch_name, prinst.watch_old._int, prinst.watch_ptr->_int);
			break;
		case ev_function:
		case ev_string:
			printf("Watch point hit in %s, \"%s\" now set to %s.\n", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name), prinst.watch_name, PR_ValueString(progfuncs, prinst.watch_type, prinst.watch_ptr));
			break;
		}
		prinst.watch_old = *prinst.watch_ptr;
//		prinst.watch_ptr = NULL;
		if (progfuncs->funcs.pr_trace<1)
			progfuncs->funcs.pr_trace=1;	//this is what it's for
	}

	if (progfuncs->funcs.pr_trace)
		s=ShowStep(progfuncs, s);
	st = pr_statements + s;

reeval:
#else
	st++;
#endif
	switch (OPCODE)
	{
	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:
		tmpf = OPA->_float;
		OPC->_vector[0] = tmpf * OPB->_vector[0];
		OPC->_vector[1] = tmpf * OPB->_vector[1];
		OPC->_vector[2] = tmpf * OPB->_vector[2];
		break;
	case OP_MUL_VF:
		tmpf = OPB->_float;
		OPC->_vector[0] = tmpf * OPA->_vector[0];
		OPC->_vector[1] = tmpf * OPA->_vector[1];
		OPC->_vector[2] = tmpf * OPA->_vector[2];
		break;

	case OP_DIV_F:
		OPC->_float = OPA->_float / OPB->_float;
		break;
	case OP_DIV_VF:
		tmpf = OPB->_float;
		OPC->_vector[0] = tmpf / OPA->_vector[0];
		OPC->_vector[1] = tmpf / OPA->_vector[1];
		OPC->_vector[2] = tmpf / OPA->_vector[2];
		break;

	case OP_BITAND_F:
		OPC->_float = (float)((int)OPA->_float & (int)OPB->_float);
		break;

	case OP_BITOR_F:
		OPC->_float = (float)((int)OPA->_float | (int)OPB->_float);
		break;


	case OP_GE_F:
		OPC->_float = (float)(OPA->_float >= OPB->_float);
		break;
	case OP_GE_I:
		OPC->_int = (int)(OPA->_int >= OPB->_int);
		break;
	case OP_GE_IF:
		OPC->_float = (float)(OPA->_int >= OPB->_float);
		break;
	case OP_GE_FI:
		OPC->_float = (float)(OPA->_float >= OPB->_int);
		break;

	case OP_LE_F:
		OPC->_float = (float)(OPA->_float <= OPB->_float);
		break;
	case OP_LE_I:
		OPC->_int = (int)(OPA->_int <= OPB->_int);
		break;
	case OP_LE_IF:
		OPC->_float = (float)(OPA->_int <= OPB->_float);
		break;
	case OP_LE_FI:
		OPC->_float = (float)(OPA->_float <= OPB->_int);
		break;

	case OP_GT_F:
		OPC->_float = (float)(OPA->_float > OPB->_float);
		break;
	case OP_GT_I:
		OPC->_int = (int)(OPA->_int > OPB->_int);
		break;
	case OP_GT_IF:
		OPC->_float = (float)(OPA->_int > OPB->_float);
		break;
	case OP_GT_FI:
		OPC->_float = (float)(OPA->_float > OPB->_int);
		break;

	case OP_LT_F:
		OPC->_float = (float)(OPA->_float < OPB->_float);
		break;
	case OP_LT_I:
		OPC->_int = (int)(OPA->_int < OPB->_int);
		break;
	case OP_LT_IF:
		OPC->_float = (float)(OPA->_int < OPB->_float);
		break;
	case OP_LT_FI:
		OPC->_float = (float)(OPA->_float < OPB->_int);
		break;

	case OP_AND_F:
		OPC->_float = (float)(OPA->_float && OPB->_float);
		break;
	case OP_OR_F:
		OPC->_float = (float)(OPA->_float || OPB->_float);
		break;

	case OP_NOT_F:
		OPC->_float = (float)(!OPA->_float);
		break;
	case OP_NOT_V:
		OPC->_float = (float)(!OPA->_vector[0] && !OPA->_vector[1] && !OPA->_vector[2]);
		break;
	case OP_NOT_S:
		OPC->_float = (float)(!(OPA->string) || !*PR_StringToNative(&progfuncs->funcs, OPA->string));
		break;
	case OP_NOT_FNC:
		OPC->_float = (float)(!(OPA->function & ~0xff000000));
		break;
	case OP_NOT_ENT:
		OPC->_float = (float)(PROG_TO_EDICT(progfuncs, OPA->edict) == (edictrun_t *)sv_edicts);
		break;

	case OP_EQ_F:
		OPC->_float = (float)(OPA->_float == OPB->_float);
		break;
	case OP_EQ_IF:
		OPC->_float = (float)(OPA->_int == OPB->_float);
		break;
	case OP_EQ_FI:
		OPC->_float = (float)(OPA->_float == OPB->_int);
		break;


	case OP_EQ_V:
		OPC->_float = (float)((OPA->_vector[0] == OPB->_vector[0]) &&
					(OPA->_vector[1] == OPB->_vector[1]) &&
					(OPA->_vector[2] == OPB->_vector[2]));
		break;
	case OP_EQ_S:
		if (OPA->string==OPB->string)
			OPC->_float = true;
		else if (!OPA->string)
		{
			if (!OPB->string || !*PR_StringToNative(&progfuncs->funcs, OPB->string))
				OPC->_float = true;
			else
				OPC->_float = false;
		}
		else if (!OPB->string)
		{
			if (!OPA->string || !*PR_StringToNative(&progfuncs->funcs, OPA->string))
				OPC->_float = true;
			else
				OPC->_float = false;
		}
		else
			OPC->_float = (float)(!strcmp(PR_StringToNative(&progfuncs->funcs, OPA->string),PR_StringToNative(&progfuncs->funcs, OPB->string)));
		break;
	case OP_EQ_E:
		OPC->_float = (float)(OPA->_int == OPB->_int);
		break;
	case OP_EQ_FNC:
		OPC->_float = (float)(OPA->function == OPB->function);
		break;


	case OP_NE_F:
		OPC->_float = (float)(OPA->_float != OPB->_float);
		break;
	case OP_NE_V:
		OPC->_float = (float)((OPA->_vector[0] != OPB->_vector[0]) ||
					(OPA->_vector[1] != OPB->_vector[1]) ||
					(OPA->_vector[2] != OPB->_vector[2]));
		break;
	case OP_NE_S:
		if (OPA->string==OPB->string)
			OPC->_float = false;
		else if (!OPA->string)
		{
			if (!OPB->string || !*(PR_StringToNative(&progfuncs->funcs, OPB->string)))
				OPC->_float = false;
			else
				OPC->_float = true;
		}
		else if (!OPB->string)
		{
			if (!OPA->string || !*PR_StringToNative(&progfuncs->funcs, OPA->string))
				OPC->_float = false;
			else
				OPC->_float = true;
		}
		else
			OPC->_float = (float)(strcmp(PR_StringToNative(&progfuncs->funcs, OPA->string),PR_StringToNative(&progfuncs->funcs, OPB->string)));		
		break;
	case OP_NE_E:
		OPC->_float = (float)(OPA->_int != OPB->_int);
		break;
	case OP_NE_FNC:
		OPC->_float = (float)(OPA->function != OPB->function);
		break;

//==================
	case OP_STORE_IF:
		OPB->_float = (float)OPA->_int;
		break;
	case OP_STORE_FI:
		OPB->_int = (int)OPA->_float;
		break;
		
	case OP_STORE_F:
	case OP_STORE_ENT:
	case OP_STORE_FLD:		// integers
	case OP_STORE_S:
	case OP_STORE_I:
	case OP_STORE_FNC:		// pointers
	case OP_STORE_P:
		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;

	//store a value to a pointer
	case OP_STOREP_IF:
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		ptr->_float = (float)OPA->_int;
		break;
	case OP_STOREP_FI:
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		ptr->_int = (int)OPA->_float;
		break;
	case OP_STOREP_I:
	case OP_GSTOREP_I:
	case OP_STOREP_F:
	case OP_GSTOREP_F:
	case OP_STOREP_ENT:
	case OP_GSTOREP_ENT:
	case OP_STOREP_FLD:		// integers
	case OP_GSTOREP_FLD:
	case OP_STOREP_S:
	case OP_GSTOREP_S:
	case OP_STOREP_FNC:		// pointers
	case OP_GSTOREP_FNC:
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s (%x >= %x)", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name), OPB->_int, prinst.addressableused);
		}
		ptr = QCPOINTER(OPB);
		ptr->_int = OPA->_int;
		break;
	case OP_STOREP_V:
	case OP_GSTOREP_V:
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		ptr->_vector[0] = OPA->_vector[0];
		ptr->_vector[1] = OPA->_vector[1];
		ptr->_vector[2] = OPA->_vector[2];
		break;

	case OP_STOREP_C:	//store character in a string
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		*(unsigned char *)ptr = (char)OPA->_float;
		break;

	case OP_MULSTORE_F: // f *= f
		OPB->_float *= OPA->_float;
		break;
	case OP_MULSTORE_VF: // v *= f
		tmpf = OPA->_float;
		OPB->_vector[0] *= tmpf;
		OPB->_vector[1] *= tmpf;
		OPB->_vector[2] *= tmpf;
		break;
	case OP_MULSTOREP_F: // e.f *= f
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		OPC->_float = (ptr->_float *= OPA->_float);
		break;
	case OP_MULSTOREP_VF: // e.v *= f
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		tmpf = OPA->_float;
		ptr = QCPOINTER(OPB);
		OPC->_vector[0] = (ptr->_vector[0] *= tmpf);
		OPC->_vector[0] = (ptr->_vector[1] *= tmpf);
		OPC->_vector[0] = (ptr->_vector[2] *= tmpf);
		break;

	case OP_DIVSTORE_F: // f /= f
		OPB->_float /= OPA->_float;
		break;
	case OP_DIVSTOREP_F: // e.f /= f
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		OPC->_float = (ptr->_float /= OPA->_float);
		break;

	case OP_ADDSTORE_F: // f += f
		OPB->_float += OPA->_float;
		break;
	case OP_ADDSTORE_V: // v += v
		OPB->_vector[0] += OPA->_vector[0];
		OPB->_vector[1] += OPA->_vector[1];
		OPB->_vector[2] += OPA->_vector[2];
		break;
	case OP_ADDSTOREP_F: // e.f += f
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		OPC->_float = (ptr->_float += OPA->_float);
		break;
	case OP_ADDSTOREP_V: // e.v += v
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		OPC->_vector[0] = (ptr->_vector[0] += OPA->_vector[0]);
		OPC->_vector[1] = (ptr->_vector[1] += OPA->_vector[1]);
		OPC->_vector[2] = (ptr->_vector[2] += OPA->_vector[2]);
		break;

	case OP_SUBSTORE_F: // f -= f
		OPB->_float -= OPA->_float;
		break;
	case OP_SUBSTORE_V: // v -= v
		OPB->_vector[0] -= OPA->_vector[0];
		OPB->_vector[1] -= OPA->_vector[1];
		OPB->_vector[2] -= OPA->_vector[2];
		break;
	case OP_SUBSTOREP_F: // e.f -= f
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		OPC->_float = (ptr->_float -= OPA->_float);
		break;
	case OP_SUBSTOREP_V: // e.v -= v
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		OPC->_vector[0] = (ptr->_vector[0] -= OPA->_vector[0]);
		OPC->_vector[1] = (ptr->_vector[1] -= OPA->_vector[1]);
		OPC->_vector[2] = (ptr->_vector[2] -= OPA->_vector[2]);
		break;


	//get a pointer to a field var
	case OP_ADDRESS:
		if ((unsigned)OPA->edict >= (unsigned)maxedicts)
		{
#ifndef DEBUGABLE
			progfuncs->funcs.pr_trace++;
			printf("OP_ADDRESS references invalid entity in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
			st--;
			goto cont;
#else
			PR_RunError (&progfuncs->funcs, "OP_ADDRESS references invalid entity in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
#endif
		}
		ed = PROG_TO_EDICT(progfuncs, OPA->edict);
#ifdef PARANOID
		NUM_FOR_EDICT(ed);		// make sure it's in range
#endif
		if (!ed || ed->readonly)
		{
			pr_xstatement = st-pr_statements;
#ifndef DEBUGABLE
			//boot it over to the debugger
			progfuncs->funcs.pr_trace++;
			printf("assignment to read-only entity in %s\n", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
			st--;
			goto cont;
#else
			{
				ddef16_t *d16;
				fdef_t *f;
				d16 = ED_GlobalAtOfs16(progfuncs, st->a);
				f = ED_FieldAtOfs(progfuncs, OPB->_int + progfuncs->funcs.fieldadjust);
				printf ("assignment to read-only entity in %s (%s.%s)\n", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name), d16?PR_StringToNative(&progfuncs->funcs, d16->s_name):NULL, f?f->name:NULL);
			}
#endif
		}

//Whilst the next block would technically be correct, we don't use it as it breaks too many quake mods.
//		if (ed->isfree)
//		{
//			pr_xstatement = st-pr_statements;
//			PR_RunError (progfuncs, "assignment to free entitiy in %s", PR_StringToNative(progfuncs, pr_xfunction->s_name));
//		}
		OPC->_int = ENGINEPOINTER((((int *)edvars(ed)) + OPB->_int + progfuncs->funcs.fieldadjust));
		break;

	//load a field to a value
	case OP_LOAD_P:
	case OP_LOAD_I:
	case OP_LOAD_F:
	case OP_LOAD_FLD:
	case OP_LOAD_ENT:
	case OP_LOAD_S:
	case OP_LOAD_FNC:
		if ((unsigned)OPA->edict >= (unsigned)maxedicts)
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "OP_LOAD references invalid entity in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ed = PROG_TO_EDICT(progfuncs, OPA->edict);
#ifdef PARANOID
		NUM_FOR_EDICT(ed);		// make sure it's in range
#endif
		ptr = (eval_t *)(((int *)edvars(ed)) + OPB->_int + progfuncs->funcs.fieldadjust);
		OPC->_int = ptr->_int;
		break;

	case OP_LOAD_V:
		if ((unsigned)OPA->edict >= (unsigned)maxedicts)
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "OP_LOAD_V references invalid entity in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ed = PROG_TO_EDICT(progfuncs, OPA->edict);
#ifdef PARANOID
		NUM_FOR_EDICT(ed);		// make sure it's in range
#endif
		ptr = (eval_t *)(((int *)edvars(ed)) + OPB->_int + progfuncs->funcs.fieldadjust);
		OPC->_vector[0] = ptr->_vector[0];
		OPC->_vector[1] = ptr->_vector[1];
		OPC->_vector[2] = ptr->_vector[2];
		break;	
		
//==================

	case OP_IFNOT_S:
		RUNAWAYCHECK();
		if (!OPA->string || !PR_StringToNative(&progfuncs->funcs, OPA->string))
			st += (sofs)st->b - 1;	// offset the s++
		break;

	case OP_IFNOT_F:
		RUNAWAYCHECK();
		if (!OPA->_float)
			st += (sofs)st->b - 1;	// offset the s++
		break;

	case OP_IFNOT_I:
		RUNAWAYCHECK();
		if (!OPA->_int)
			st += (sofs)st->b - 1;	// offset the s++
		break;

	case OP_IF_S:
		RUNAWAYCHECK();
		if (OPA->string && PR_StringToNative(&progfuncs->funcs, OPA->string))
			st += (sofs)st->b - 1;	// offset the s++
		break;

	case OP_IF_F:
		RUNAWAYCHECK();
		if (OPA->_int)
			st += (sofs)st->b - 1;	// offset the s++
		break;

	case OP_IF_I:
		RUNAWAYCHECK();
		if (OPA->_int)
			st += (sofs)st->b - 1;	// offset the s++
		break;
		
	case OP_GOTO:
		RUNAWAYCHECK();
		st += (sofs)st->a - 1;	// offset the s++
		break;

	case OP_CALL8H:
	case OP_CALL7H:
	case OP_CALL6H:
	case OP_CALL5H:
	case OP_CALL4H:
	case OP_CALL3H:
	case OP_CALL2H:
		G_VECTOR(OFS_PARM1)[0] = OPC->_vector[0];
		G_VECTOR(OFS_PARM1)[1] = OPC->_vector[1];
		G_VECTOR(OFS_PARM1)[2] = OPC->_vector[2];
	case OP_CALL1H:
		G_VECTOR(OFS_PARM0)[0] = OPB->_vector[0];
		G_VECTOR(OFS_PARM0)[1] = OPB->_vector[1];
		G_VECTOR(OFS_PARM0)[2] = OPB->_vector[2];

	case OP_CALL8:
	case OP_CALL7:
	case OP_CALL6:
	case OP_CALL5:
	case OP_CALL4:
	case OP_CALL3:
	case OP_CALL2:
	case OP_CALL1:
	case OP_CALL0:
		{
			int callerprogs;
			int newpr;
			unsigned int fnum;
			RUNAWAYCHECK();
			pr_xstatement = st-pr_statements;

			if (OPCODE > OP_CALL8)
				progfuncs->funcs.callargc = OPCODE - (OP_CALL1H-1);
			else
				progfuncs->funcs.callargc = OPCODE - OP_CALL0;
			fnum = OPA->function;

			callerprogs=pr_typecurrent;			//so we can revert to the right caller.
			newpr = (fnum & 0xff000000)>>24;	//this is the progs index of the callee
			fnum &= ~0xff000000;				//the callee's function index.

			//if it's an external call, switch now (before any function pointers are used)
			if (!PR_SwitchProgsParms(progfuncs, newpr) || !fnum || fnum > pr_progs->numfunctions)
			{
				char *msg = fnum?"OP_CALL references invalid function in %s\n":"NULL function from qc (%s).\n";
				PR_SwitchProgsParms(progfuncs, callerprogs);

				//break/skip the instruction.
				printf(msg, PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
#ifndef DEBUGABLE
				progfuncs->funcs.pr_trace++;
				st--;
				goto cont;
#else
				pr_globals[OFS_RETURN] = 0;
				pr_globals[OFS_RETURN+1] = 0;
				pr_globals[OFS_RETURN+2] = 0;
				break;
#endif
			}

			newf = &pr_functions[fnum & ~0xff000000];

			if (newf->first_statement < 0)
			{	// negative statements are built in functions
				/*calling a builtin in another progs may affect that other progs' globals instead, is the theory anyway, so args and stuff need to move over*/
				if (pr_typecurrent != 0)
				{
					PR_SwitchProgsParms(progfuncs, 0);
				}
				i = -newf->first_statement;
	//			p = pr_typecurrent;
				progfuncs->funcs.lastcalledbuiltinnumber = i;
				if (i < externs->numglobalbuiltins)
				{
					prinst.numtempstringsstack = prinst.numtempstrings;
					(*externs->globalbuiltins[i]) (&progfuncs->funcs, (struct globalvars_s *)current_progstate->globals);
					if (prinst.continuestatement!=-1)
					{
						st=&pr_statements[prinst.continuestatement];
						prinst.continuestatement=-1;
						break;
					}
				}
				else
				{
					i -= externs->numglobalbuiltins;
					if (i >= current_progstate->numbuiltins)
					{
	//					if (newf->first_statement == -0x7fffffff)
	//						((builtin_t)newf->profile) (progfuncs, (struct globalvars_s *)current_progstate->globals);
	//					else
							PR_RunError (&progfuncs->funcs, "Bad builtin call number - %i", -newf->first_statement);
					}
					else
						current_progstate->builtins [i] (&progfuncs->funcs, (struct globalvars_s *)current_progstate->globals);
				}
	//			memcpy(&pr_progstate[p].globals[OFS_RETURN], &current_progstate->globals[OFS_RETURN], sizeof(vec3_t));
				PR_SwitchProgsParms(progfuncs, (progsnum_t)callerprogs);

	//#ifndef DEBUGABLE	//decide weather non debugger wants to start debugging.
				s = st-pr_statements;
				goto restart;
	//#endif
	//			break;
			}
	//		PR_SwitchProgsParms((OPA->function & 0xff000000)>>24);
			s = PR_EnterFunction (progfuncs, newf, callerprogs);
			st = &pr_statements[s];
		}
		
		goto restart;
//		break;

	case OP_DONE:
	case OP_RETURN:

		RUNAWAYCHECK();

		pr_globals[OFS_RETURN] = pr_globals[st->a];
		pr_globals[OFS_RETURN+1] = pr_globals[st->a+1];
		pr_globals[OFS_RETURN+2] = pr_globals[st->a+2];
/*
{
	static char buffer[1024*1024*8];
	int size = sizeof buffer;
		progfuncs->save_ents(progfuncs, buffer, &size, 0);
}
*/
		s = PR_LeaveFunction (progfuncs);
		st = &pr_statements[s];		
		if (pr_depth == prinst.exitdepth)
		{		
			return;		// all done
		}
		goto restart;
//		break;

	case OP_STATE:
		externs->stateop(&progfuncs->funcs, OPA->_float, OPB->function);
		break;

	case OP_ADD_I:		
		OPC->_int = OPA->_int + OPB->_int;
		break;
	case OP_ADD_FI:
		OPC->_float = OPA->_float + (float)OPB->_int;
		break;
	case OP_ADD_IF:
		OPC->_float = (float)OPA->_int + OPB->_float;
		break;
  
	case OP_SUB_I:
		OPC->_int = OPA->_int - OPB->_int;
		break;
	case OP_SUB_FI:
		OPC->_float = OPA->_float - (float)OPB->_int;
		break;
	case OP_SUB_IF:
		OPC->_float = (float)OPA->_int - OPB->_float;
		break;

	case OP_CONV_ITOF:
		OPC->_float = (float)OPA->_int;
		break;
	case OP_CONV_FTOI:
		OPC->_int = (int)OPA->_float;
		break;

	case OP_CP_ITOF:
		ptr = (eval_t *)(((qbyte *)sv_edicts) + OPA->_int);
		OPC->_float = (float)ptr->_int;
		break;

	case OP_CP_FTOI:
		ptr = (eval_t *)(((qbyte *)sv_edicts) + OPA->_int);
		OPC->_int = (int)ptr->_float;
		break;

	case OP_BITAND_I:
		OPC->_int = (OPA->_int & OPB->_int);
		break;
	
	case OP_BITOR_I:
		OPC->_int = (OPA->_int | OPB->_int);
		break;

	case OP_MUL_I:		
		OPC->_int = OPA->_int * OPB->_int;
		break;
	case OP_DIV_I:
		if (OPB->_int == 0)	//no division by zero allowed...
			OPC->_int = 0;
		else
			OPC->_int = OPA->_int / OPB->_int;
		break;
	case OP_EQ_I:
		OPC->_int = (OPA->_int == OPB->_int);
		break;
	case OP_NE_I:
		OPC->_int = (OPA->_int != OPB->_int);
		break;
	

	//array/structure reading/writing.
	case OP_GLOBALADDRESS:
		OPC->_int = ENGINEPOINTER(&OPA->_int + OPB->_int); /*pointer arithmatic*/
		break;
	case OP_POINTER_ADD:	//pointer to 32 bit (remember to *3 for vectors)
		OPC->_int = OPA->_int + OPB->_int*4;
		break;

	case OP_LOADA_I:
	case OP_LOADA_F:
	case OP_LOADA_FLD:
	case OP_LOADA_ENT:
	case OP_LOADA_S:
	case OP_LOADA_FNC:
		ptr = (eval_t *)(&OPA->_int + OPB->_int); /*pointer arithmatic*/
		OPC->_int = ptr->_int;
		break;

	case OP_LOADA_V:
		ptr = (eval_t *)(&OPA->_int + OPB->_int);
		OPC->_vector[0] = ptr->_vector[0];
		OPC->_vector[1] = ptr->_vector[1];
		OPC->_vector[2] = ptr->_vector[2];
		break;



	case OP_ADD_SF:	//(char*)c = (char*)a + (float)b
		OPC->_int = OPA->_int + (int)OPB->_float;
		break;
	case OP_SUB_S:	//(float)c = (char*)a - (char*)b
		OPC->_int = OPA->_int - OPB->_int;
		break;
	case OP_LOADP_C:	//load character from a string
		i = (unsigned int)OPA->_int + (unsigned int)OPB->_float;
		if ((unsigned int)i >= prinst.addressableused)
		{
			i = (unsigned int)OPB->_float;
			ptr = (eval_t*)PR_StringToNative(&progfuncs->funcs, OPA->_int);
			if ((size_t)i > strlen((char*)ptr))
			{
				pr_xstatement = st-pr_statements;
				PR_RunError (&progfuncs->funcs, "bad pointer read in %s (%i bytes into %s)", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name), i, ptr);
			}
			ptr = (eval_t*)((char*)ptr + i);
		}
		else 
			ptr = QCPOINTERM(i);
		OPC->_float = *(unsigned char *)ptr;
		break;
	case OP_LOADP_I:
	case OP_LOADP_F:
	case OP_LOADP_FLD:
	case OP_LOADP_ENT:
	case OP_LOADP_S:
	case OP_LOADP_FNC:
		i = OPA->_int + OPB->_int*4;
		if ((unsigned int)i >= prinst.addressableused)
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer read in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTERM(OPA->_int + OPB->_int*4);
		OPC->_int = ptr->_int;
		break;

	case OP_LOADP_V:
		i = OPA->_int + OPB->_int*4;
		if ((unsigned int)i >= prinst.addressableused)
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer read in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTERM(i);
		OPC->_vector[0] = ptr->_vector[0];
		OPC->_vector[1] = ptr->_vector[1];
		OPC->_vector[2] = ptr->_vector[2];
		break;

	case OP_XOR_I:
		OPC->_int = OPA->_int ^ OPB->_int;
		break;
	case OP_RSHIFT_I:
		OPC->_int = OPA->_int >> OPB->_int;
		break;
	case OP_LSHIFT_I:
		OPC->_int = OPA->_int << OPB->_int;
		break;


	case OP_FETCH_GBL_F:
	case OP_FETCH_GBL_S:
	case OP_FETCH_GBL_E:
	case OP_FETCH_GBL_FNC:
		i = (int)OPB->_float;
		if(i < 0 || i > ((eval_t *)&glob[st->a-1])->_int)
		{
			PR_RunError(&progfuncs->funcs, "array index out of bounds: %s[%d] (max %d)", PR_GlobalStringNoContents(progfuncs, st->a), i, ((eval_t *)&glob[st->a-1])->_int);
		}
		t = (eval_t *)&pr_globals[(uofs)st->a + i];
		OPC->_int = t->_int;
		break;
	case OP_FETCH_GBL_V:
		i = (int)OPB->_float;
		if(i < 0 || i > ((eval_t *)&glob[st->a-1])->_int)
		{
			pr_xstatement = st-pr_statements;
			PR_RunError(&progfuncs->funcs, "array index out of bounds: %s[%d]", PR_GlobalStringNoContents(progfuncs, st->a), i);
		}
		t = (eval_t *)&pr_globals[(uofs)st->a + i*3];
		OPC->_vector[0] = t->_vector[0];
		OPC->_vector[1] = t->_vector[1];
		OPC->_vector[2] = t->_vector[2];
		break;

	case OP_CSTATE:
		externs->cstateop(&progfuncs->funcs, OPA->_float, OPB->_float, pr_xfunction - pr_functions);
		break;

	case OP_CWSTATE:
		externs->cwstateop(&progfuncs->funcs, OPA->_float, OPB->_float, pr_xfunction - pr_functions);
		break;

	case OP_THINKTIME:
		externs->thinktimeop(&progfuncs->funcs, (struct edict_s *)PROG_TO_EDICT(progfuncs, OPA->edict), OPB->_float);
		break;


	case OP_BITSET: // b (+) a
		OPB->_float = (float)((int)OPB->_float | (int)OPA->_float);
		break;
	case OP_BITSETP: // .b (+) a
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		ptr->_float = (float)((int)ptr->_float | (int)OPA->_float);
		break;
	case OP_BITCLR: // b (-) a
		OPB->_float = (float)((int)OPB->_float & ~((int)OPA->_float));
		break;
	case OP_BITCLRP: // .b (-) a
		if (QCPOINTERWRITEFAIL(OPB))
		{
			pr_xstatement = st-pr_statements;
			PR_RunError (&progfuncs->funcs, "bad pointer write in %s", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
		}
		ptr = QCPOINTER(OPB);
		ptr->_float = (float)((int)ptr->_float & ~((int)OPA->_float));
		break;

	case OP_RAND0:
		OPC->_float = (rand()&0x7fff)/((float)0x7fff);
		break;
	case OP_RAND1:
		OPC->_float = (rand()&0x7fff)/((float)0x7fff)*OPA->_float;
		break;
	case OP_RAND2:
		if(OPA->_float < OPB->_float)
		{
			OPC->_float = OPA->_float+((rand()&0x7fff)/((float)0x7fff)
				*(OPB->_float-OPA->_float));
		}
		else
		{
			OPC->_float = OPB->_float+((rand()&0x7fff)/((float)0x7fff)
				*(OPA->_float-OPB->_float));
		}
		break;
	case OP_RANDV0:
		OPC->_vector[0] = (rand()&0x7fff)/((float)0x7fff);
		OPC->_vector[1] = (rand()&0x7fff)/((float)0x7fff);
		OPC->_vector[2] = (rand()&0x7fff)/((float)0x7fff);
		break;
	case OP_RANDV1:
		OPC->_vector[0] = (rand()&0x7fff)/((float)0x7fff)*OPA->_vector[0];
		OPC->_vector[1] = (rand()&0x7fff)/((float)0x7fff)*OPA->_vector[1];
		OPC->_vector[2] = (rand()&0x7fff)/((float)0x7fff)*OPA->_vector[2];
		break;
	case OP_RANDV2:
		for(i = 0; i < 3; i++)
		{
			if(OPA->_vector[i] < OPB->_vector[i])
			{
				OPC->_vector[i] = OPA->_vector[i]+((rand()&0x7fff)/((float)0x7fff)
					*(OPB->_vector[i]-OPA->_vector[i]));
			}
			else
			{
				OPC->_vector[i] = OPB->_vector[i]+(rand()*(1.0f/RAND_MAX)
					*(OPA->_vector[i]-OPB->_vector[i]));
			}
		}
		break;


	case OP_SWITCH_F:
	case OP_SWITCH_V:
	case OP_SWITCH_S:
	case OP_SWITCH_E:
	case OP_SWITCH_FNC:
		swtch = OPA;
		swtchtype = OPCODE;
		RUNAWAYCHECK();
		st += (sofs)st->b - 1;	// offset the st++
		break;
	case OP_CASE:
		switch(swtchtype)
		{
		case OP_SWITCH_F:
			if (swtch->_float == OPA->_float)
			{
				RUNAWAYCHECK();
				st += (sofs)st->b-1; // -1 to offset the s++
			}
			break;
		case OP_SWITCH_E:
		case OP_SWITCH_FNC:
			if (swtch->_int == OPA->_int)
			{
				RUNAWAYCHECK();
				st += (sofs)st->b-1; // -1 to offset the s++
			}
			break;
		case OP_SWITCH_S:
			if (swtch->_int == OPA->_int)
			{
				RUNAWAYCHECK();
				st += (sofs)st->b-1; // -1 to offset the s++
			}
			if ((!swtch->_int && PR_StringToNative(&progfuncs->funcs, OPA->string)) || (!OPA->_int && PR_StringToNative(&progfuncs->funcs, swtch->string)))	//one is null (cannot be not both).
				break;
			if (!strcmp(PR_StringToNative(&progfuncs->funcs, swtch->string), PR_StringToNative(&progfuncs->funcs, OPA->string)))
			{
				RUNAWAYCHECK();
				st += (sofs)st->b-1; // -1 to offset the s++
			}
			break;
		case OP_SWITCH_V:
			if (swtch->_vector[0] == OPA->_vector[0] && swtch->_vector[1] == OPA->_vector[1] && swtch->_vector[2] == OPA->_vector[2])
			{
				RUNAWAYCHECK();
				st += (sofs)st->b-1; // -1 to offset the s++
			}
			break;
		default:
			PR_RunError (&progfuncs->funcs, "OP_CASE with bad/missing OP_SWITCH %i", swtchtype);
			break;
		}
		break;
	case OP_CASERANGE:
		switch(swtchtype)
		{
		case OP_SWITCH_F:
			if (swtch->_float >= OPA->_float && swtch->_float <= OPB->_float)
			{
				RUNAWAYCHECK();
				st += (sofs)st->c-1; // -1 to offset the s++
			}
			break;
		default:
			PR_RunError (&progfuncs->funcs, "OP_CASERANGE with bad/missing OP_SWITCH %i", swtchtype);
		}
		break;









	case OP_BITAND_IF:
		OPC->_int = (OPA->_int & (int)OPB->_float);
		break;
	case OP_BITOR_IF:
		OPC->_int = (OPA->_int | (int)OPB->_float);
		break;
	case OP_BITAND_FI:
		OPC->_int = ((int)OPA->_float & OPB->_int);
		break;
	case OP_BITOR_FI:
		OPC->_int = ((int)OPA->_float | OPB->_int);
		break;

	case OP_MUL_IF:
		OPC->_float = (OPA->_int * OPB->_float);
		break;
	case OP_MUL_FI:
		OPC->_float = (OPA->_float * OPB->_int);
		break;

	case OP_MUL_VI:
		tmpi = OPB->_int;
		OPC->_vector[0] = OPA->_vector[0] * tmpi;
		OPC->_vector[1] = OPA->_vector[0] * tmpi;
		OPC->_vector[2] = OPA->_vector[0] * tmpi;
		break;
	case OP_MUL_IV:
		tmpi = OPA->_int;
		OPC->_vector[0] = tmpi * OPB->_vector[0];
		OPC->_vector[1] = tmpi * OPB->_vector[1];
		OPC->_vector[2] = tmpi * OPB->_vector[2];
		break;

	case OP_DIV_IF:
		OPC->_float = (OPA->_int / OPB->_float);
		break;
	case OP_DIV_FI:
		OPC->_float = (OPA->_float / OPB->_int);
		break;

	case OP_AND_I:
		OPC->_int = (OPA->_int && OPB->_int);
		break;
	case OP_OR_I:
		OPC->_int = (OPA->_int || OPB->_int);
		break;

	case OP_AND_IF:
		OPC->_int = (OPA->_int && OPB->_float);
		break;
	case OP_OR_IF:
		OPC->_int = (OPA->_int || OPB->_float);
		break;

	case OP_AND_FI:
		OPC->_int = (OPA->_float && OPB->_int);
		break;
	case OP_OR_FI:
		OPC->_int = (OPA->_float || OPB->_int);
		break;

	case OP_NOT_I:
		OPC->_int = !OPA->_int;
		break;

	case OP_NE_IF:
		OPC->_int = (OPA->_int != OPB->_float);
		break;
	case OP_NE_FI:
		OPC->_int = (OPA->_float != OPB->_int);
		break;

	case OP_GADDRESS: //return glob[aint+bfloat]
	case OP_GLOAD_I:
	case OP_GLOAD_F:
	case OP_GLOAD_FLD:
	case OP_GLOAD_ENT:
	case OP_GLOAD_S:
	case OP_GLOAD_FNC:
		pr_xstatement = st-pr_statements;
		PR_RunError(&progfuncs->funcs, "Extra opcode not implemented\n");
		break;

	case OP_BOUNDCHECK:
		if ((unsigned int)OPA->_int < (unsigned int)st->c || (unsigned int)OPA->_int >= (unsigned int)st->b)
		{
			printf("Progs boundcheck failed. Value is %i. Must be between %u and %u\n", OPA->_int, st->c, st->b);
			s=ShowStep(progfuncs, st - pr_statements);
			if (st == pr_statements + s)
				PR_RunError(&progfuncs->funcs, "unable to resume boundcheck");
			st = pr_statements + s;
			goto restart;
		}
		break;
/*	case OP_PUSH:
		OPC->_int = ENGINEPOINTER(&localstack[localstack_used+pr_spushed]);
		pr_spushed += OPA->_int;
		if (pr_spushed + localstack_used >= LOCALSTACK_SIZE)
		{
			pr_spushed = 0;
			pr_xstatement = st-pr_statements;
			PR_RunError(progfuncs, "Progs pushed too much");
		}
		break;
	case OP_POP:
		pr_spushed -= OPA->_int;
		if (pr_spushed < 0)
		{
			pr_spushed = 0;
			pr_xstatement = st-pr_statements;
			PR_RunError(progfuncs, "Progs poped more than it pushed");
		}
		break;
*/
	default:					
		if (st->op & 0x8000)	//break point!
		{
			pr_xstatement = s = st-pr_statements;

			printf("Break point hit in %s.\n", PR_StringToNative(&progfuncs->funcs, pr_xfunction->s_name));
			if (progfuncs->funcs.pr_trace<1)
				progfuncs->funcs.pr_trace=1;	//this is what it's for

			s = ShowStep(progfuncs, s);
			st = &pr_statements[s];	//let the user move execution
			pr_xstatement = s = st-pr_statements;

			goto reeval;	//reexecute
		}
		pr_xstatement = st-pr_statements;
		PR_RunError (&progfuncs->funcs, "Bad opcode %i", st->op);
	}
}


#undef cont
#undef reeval
#undef st
#undef pr_statements
#undef fakeop
#undef dstatement_t
#undef sofs
#undef uofs
#undef OPCODE

#undef ENGINEPOINTER
#undef QCPOINTER
#undef QCPOINTERM