#define DOOP(ppname) PUTBACK; PL_op = ppname(ARGS); SPAGAIN

#define PP_LIST(g) do {			\
	dMARK;				\
	if (g != G_ARRAY) {		\
	    if (++MARK <= SP)		\
		*MARK = *SP;		\
	    else			\
		*MARK = &PL_sv_undef;	\
	    SP = MARK;			\
	}				\
   } while (0)

#define MAYBE_TAINT_SASSIGN_SRC(sv) \
    if (PL_tainting && PL_tainted && (!SvGMAGICAL(left) || !SvSMAGICAL(left) || \
                                !((mg=mg_find(left, 't')) && mg->mg_len & 1)))\
        TAINT_NOT

#define PP_PREINC(sv) do {	\
	if (SvIOK(sv)) {	\
            ++SvIVX(sv);	\
	    SvFLAGS(sv) &= ~(SVf_NOK|SVf_POK|SVp_NOK|SVp_POK); \
	}			\
	else			\
	    sv_inc(sv);		\
	SvSETMAGIC(sv);		\
    } while (0)

#define PP_UNSTACK do {		\
	TAINT_NOT;		\
	PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;	\
	FREETMPS;		\
	oldsave = PL_scopestack[PL_scopestack_ix - 1]; \
	LEAVE_SCOPE(oldsave);	\
	SPAGAIN;		\
    } while(0)

/* Anyone using eval "" deserves this mess */
#define PP_EVAL(ppaddr, nxt) do {		\
	dJMPENV;				\
	int ret;				\
	PUTBACK;				\
	JMPENV_PUSH(ret);			\
	switch (ret) {				\
	case 0:					\
	    PL_op = ppaddr(ARGS);			\
	    PL_retstack[PL_retstack_ix - 1] = Nullop;	\
	    if (PL_op != nxt) CALLRUNOPS();		\
	    JMPENV_POP;				\
	    break;				\
	case 1: JMPENV_POP; JMPENV_JUMP(1);	\
	case 2: JMPENV_POP; JMPENV_JUMP(2);	\
	case 3:					\
	    JMPENV_POP;				\
	    if (PL_restartop != nxt)		\
		JMPENV_JUMP(3);			\
	}					\
	PL_op = nxt;				\
	SPAGAIN;				\
    } while (0)

#define B_JMPENV_PUSH(cur_env,v) \
    STMT_START {                                        \
        cur_env.je_prev = PL_top_env;                   \
        OP_REG_TO_MEM;                                  \
        cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, 1);    \
        OP_MEM_TO_REG;                                  \
        PL_top_env = &cur_env;                          \
        cur_env.je_mustcatch = FALSE;                   \
        (v) = cur_env.je_ret;                           \
    } STMT_END
#define B_JMPENV_POP(cur_env) \
    STMT_START { PL_top_env = cur_env.je_prev; } STMT_END

#define B_JMPENV_JUMP(cur_env,v) \
    STMT_START {                                                \
        OP_REG_TO_MEM;                                          \
        if (PL_top_env->je_prev)                                        \
            PerlProc_longjmp(PL_top_env->je_buf, (v));                  \
        if ((v) == 2)                                           \
            PerlProc_exit(STATUS_NATIVE_EXPORT);                                \
        PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");     \
        PerlProc_exit(1);                                               \
    } STMT_END    


#define PP_ENTERTRY(jmpbuf,label)  {		\
	int ret;				\
	B_JMPENV_PUSH(jmpbuf,ret);			\
	switch (ret) {				\
	case 1: B_JMPENV_POP(jmpbuf); B_JMPENV_JUMP(jmpbuf,1);	\
	case 2: B_JMPENV_POP(jmpbuf); B_JMPENV_JUMP(jmpbuf,2);	\
	case 3: B_JMPENV_POP(jmpbuf); SPAGAIN; goto label;\
	}                                       \
    } while (0)

#define PP_LEAVETRY PL_top_env=PL_top_env->je_prev