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#undef GET_ARG 
#undef GET_ARG2 
 
#ifdef PIKE_DEBUG 
 
#define GET_ARG() (backlog[backlogp].arg=(\ 
  instr=prefix,\ 
  prefix=0,\ 
  instr+=EXTRACT_UCHAR(pc++),\ 
  (t_flag>3 ? sprintf(trace_buffer,"-    Arg = %ld\n",(long)instr),write_to_stderr(trace_buffer,strlen(trace_buffer)) : 0),\ 
  instr)) 
 
#define GET_ARG2() (backlog[backlogp].arg2=(\ 
  instr=prefix2,\ 
  prefix2=0,\ 
  instr+=EXTRACT_UCHAR(pc++),\ 
  (t_flag>3 ? sprintf(trace_buffer,"-    Arg2= %ld\n",(long)instr),write_to_stderr(trace_buffer,strlen(trace_buffer)) : 0),\ 
  instr)) 
 
#else 
#define GET_ARG() (instr=prefix,prefix=0,instr+EXTRACT_UCHAR(pc++)) 
#define GET_ARG2() (instr=prefix2,prefix2=0,instr+EXTRACT_UCHAR(pc++)) 
#endif 
 
static int eval_instruction(unsigned char *pc) 
{ 
  unsigned INT32 prefix2=0,instr, prefix=0; 
  debug_malloc_touch(Pike_fp); 
  while(1) 
  { 
    Pike_fp->pc = pc; 
    instr=EXTRACT_UCHAR(pc++); 
 
#ifdef PIKE_DEBUG 
    if(d_flag) 
    { 
#ifdef _REENTRANT 
      CHECK_INTERPRETER_LOCK(); 
      if(OBJ2THREAD(Pike_interpreter.thread_id)->state.thread_id != Pike_interpreter.thread_id) 
        fatal("Arglebargle glop glyf, thread swap problem!\n"); 
 
      if(d_flag>1 && thread_for_id(th_self()) != Pike_interpreter.thread_id) 
        fatal("thread_for_id() (or Pike_interpreter.thread_id) failed in interpreter.h! %p != %p\n",thread_for_id(th_self()),Pike_interpreter.thread_id); 
#endif 
 
      Pike_sp[0].type=99; /* an invalid type */ 
      Pike_sp[1].type=99; 
      Pike_sp[2].type=99; 
      Pike_sp[3].type=99; 
       
      if(Pike_sp<Pike_interpreter.evaluator_stack || Pike_mark_sp < Pike_interpreter.mark_stack || Pike_fp->locals>Pike_sp) 
        fatal("Stack error (generic) sp=%p/%p mark_sp=%p/%p locals=%p.\n", 
              Pike_sp, 
              Pike_interpreter.evaluator_stack, 
              Pike_mark_sp, 
              Pike_interpreter.mark_stack, 
              Pike_fp->locals); 
       
      if(Pike_mark_sp > Pike_interpreter.mark_stack+Pike_stack_size) 
        fatal("Mark Stack error (overflow).\n"); 
 
 
      if(Pike_mark_sp < Pike_interpreter.mark_stack) 
        fatal("Mark Stack error (underflow).\n"); 
 
      if(Pike_sp > Pike_interpreter.evaluator_stack+Pike_stack_size) 
        fatal("stack error (overflow).\n"); 
       
      if(/* Pike_fp->fun>=0 && */ Pike_fp->current_object->prog && 
         Pike_fp->locals+Pike_fp->num_locals > Pike_sp) 
        fatal("Stack error (stupid!).\n"); 
 
      if(Pike_interpreter.recoveries && Pike_sp-Pike_interpreter.evaluator_stack < Pike_interpreter.recoveries->stack_pointer) 
        fatal("Stack error (underflow).\n"); 
 
      if(Pike_mark_sp > Pike_interpreter.mark_stack && Pike_mark_sp[-1] > Pike_sp) 
        fatal("Stack error (underflow?)\n"); 
       
      if(d_flag > 9) do_debug(); 
 
      backlogp++; 
      if(backlogp >= BACKLOG) backlogp=0; 
 
      if(backlog[backlogp].program) 
        free_program(backlog[backlogp].program); 
 
      backlog[backlogp].program=Pike_fp->context.prog; 
      add_ref(Pike_fp->context.prog); 
      backlog[backlogp].instruction=instr; 
      backlog[backlogp].pc=pc; 
      backlog[backlogp].stack = Pike_sp - Pike_interpreter.evaluator_stack; 
      backlog[backlogp].mark_stack = Pike_mark_sp - Pike_interpreter.mark_stack; 
#ifdef _REENTRANT 
      backlog[backlogp].thread_id=Pike_interpreter.thread_id; 
#endif 
 
      debug_malloc_touch(Pike_fp->current_object); 
      switch(d_flag) 
      { 
        default: 
        case 3: 
          check_object(Pike_fp->current_object); 
/*      break; */ 
 
        case 2: 
          check_object_context(Pike_fp->current_object, 
                               Pike_fp->context.prog, 
                               CURRENT_STORAGE); 
        case 1: 
        case 0: 
          break; 
      } 
    } 
 
    if(t_flag > 2) 
    { 
      char *file, *f; 
      INT32 linep; 
 
      file=get_line(pc-1,Pike_fp->context.prog,&linep); 
      while((f=STRCHR(file,'/'))) file=f+1; 
      fprintf(stderr,"- %s:%4ld:(%lx): %-25s %4ld %4ld\n", 
              file,(long)linep, 
              DO_NOT_WARN((long)(pc-Pike_fp->context.prog->program-1)), 
              get_f_name(instr + F_OFFSET), 
              DO_NOT_WARN((long)(Pike_sp-Pike_interpreter.evaluator_stack)), 
              DO_NOT_WARN((long)(Pike_mark_sp-Pike_interpreter.mark_stack))); 
    } 
 
    if(instr + F_OFFSET < F_MAX_OPCODE)  
      ADD_RUNNED(instr + F_OFFSET); 
#endif 
 
    switch(instr) 
    { 
      /* Support to allow large arguments */ 
      CASE(F_PREFIX_256); prefix+=256; break; 
      CASE(F_PREFIX_512); prefix+=512; break; 
      CASE(F_PREFIX_768); prefix+=768; break; 
      CASE(F_PREFIX_1024); prefix+=1024; break; 
      CASE(F_PREFIX_24BITX256); 
      prefix+=EXTRACT_UCHAR(pc++)<<24; 
      CASE(F_PREFIX_WORDX256); 
      prefix+=EXTRACT_UCHAR(pc++)<<16; 
      CASE(F_PREFIX_CHARX256); 
      prefix+=EXTRACT_UCHAR(pc++)<<8; 
      break; 
 
      /* Support to allow large arguments */ 
      CASE(F_PREFIX2_256); prefix2+=256; break; 
      CASE(F_PREFIX2_512); prefix2+=512; break; 
      CASE(F_PREFIX2_768); prefix2+=768; break; 
      CASE(F_PREFIX2_1024); prefix2+=1024; break; 
      CASE(F_PREFIX2_24BITX256); 
      prefix2+=EXTRACT_UCHAR(pc++)<<24; 
      CASE(F_PREFIX2_WORDX256); 
      prefix2+=EXTRACT_UCHAR(pc++)<<16; 
      CASE(F_PREFIX2_CHARX256); 
      prefix2+=EXTRACT_UCHAR(pc++)<<8; 
      break; 
 
 
#define INTERPRETER 
 
#define OPCODE0(OP,DESC) CASE(OP); { 
#define OPCODE1(OP,DESC) CASE(OP); { \ 
  INT32 arg1=GET_ARG(); 
 
#define OPCODE2(OP,DESC) CASE(OP); { \ 
  INT32 arg1=GET_ARG(); \ 
  INT32 arg2=GET_ARG2(); 
 
 
#define OPCODE0_TAIL(OP,DESC) CASE(OP); 
#define OPCODE1_TAIL(OP,DESC) CASE(OP); 
#define OPCODE2_TAIL(OP,DESC) CASE(OP); 
 
#define OPCODE0_JUMP(OP,DESC) CASE(OP); { 
#define OPCODE0_TAILJUMP(OP,DESC) } CASE(OP) {; 
 
/* These are something of a special case as they 
 * requires a POINTER stored explicitly after 
 * the instruction itself. 
 */ 
#define OPCODE1_JUMP(OP,DESC) CASE(OP); { \ 
  INT32 arg1=GET_ARG(); \ 
 
#define OPCODE2_JUMP(OP,DESC) CASE(OP); { \ 
  INT32 arg1=GET_ARG(); \ 
  INT32 arg2=GET_ARG2(); 
 
#define OPCODE1_TAILJUMP(OP,DESC) } CASE(OP) {;  
#define OPCODE2_TAILJUMP(OP,DESC) } CASE(OP) {;  
 
 
#define BREAK break; } 
#define DONE break 
 
#include "interpret_functions.h" 
       
    default: 
      fatal("Strange instruction %ld\n",(long)instr); 
    } 
 
  } 
}