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/* 
|| This file is part of Pike. For copyright information see COPYRIGHT. 
|| Pike is distributed under GPL, LGPL and MPL. See the file COPYING 
|| for more information. 
*/ 
 
#undef LOW_GET_ARG 
#undef LOW_GET_JUMP 
#undef LOW_SKIPJUMP 
#undef GET_ARG 
#undef GET_ARG2 
#undef GET_JUMP 
#undef SKIPJUMP 
#undef DOJUMP 
#undef CASE 
#undef BREAK 
#undef DONE 
 
#undef JUMP_DONE 
#define JUMP_DONE DONE 
 
 
#define CASE(X)               case (X): 
#define DONE          break 
#define FETCH 
 
#define LOW_GET_ARG() ((PROG_COUNTER++)[0]) 
#if PIKE_BYTECODE_METHOD == PIKE_BYTECODE_SPARC 
#define LOW_GET_JUMP()        (PROG_COUNTER[0]) 
#define LOW_SKIPJUMP()        (++PROG_COUNTER) 
#else /* PIKE_BYTECODE_METHOD != PIKE_BYTECODE_SPARC */ 
#define LOW_GET_JUMP()        (INT32)get_unaligned32(PROG_COUNTER) 
#define LOW_SKIPJUMP()        (PROG_COUNTER += sizeof(INT32)) 
#endif /* PIKE_BYTECODE_METHOD */ 
 
#ifdef PIKE_DEBUG 
 
#define GET_ARG() (                                           \ 
  instr=prefix,                                                 \ 
  prefix=0,                                                     \ 
  instr += LOW_GET_ARG(),                                       \ 
  DEBUG_LOG_ARG (instr),                                        \ 
  instr) 
 
#define GET_ARG2() (                                          \ 
  instr=prefix2,                                                \ 
  prefix2=0,                                                    \ 
  instr += LOW_GET_ARG(),                                       \ 
  DEBUG_LOG_ARG2 (instr),                                       \ 
  instr) 
 
#else /* !PIKE_DEBUG */ 
 
#define GET_ARG() (instr=prefix,prefix=0,instr+LOW_GET_ARG()) 
#define GET_ARG2() (instr=prefix2,prefix2=0,instr+LOW_GET_ARG()) 
 
#endif /* PIKE_DEBUG */ 
 
 
#ifndef STEP_BREAK_LINE 
#define STEP_BREAK_LINE 
#endif 
 
static int eval_instruction(PIKE_OPCODE_T *pc) 
{ 
  unsigned INT32 prefix2=0,prefix=0; 
 
  debug_malloc_touch(Pike_fp); 
  while(1) 
  { 
    INT32 arg1, arg2; 
    PIKE_INSTR_T instr = pc[0]; 
    Pike_fp->pc = pc++; 
 
    STEP_BREAK_LINE 
 
#ifdef PIKE_DEBUG 
    if (d_flag || Pike_interpreter.trace_level > 2) 
      low_debug_instr_prologue (instr); 
#endif 
 
    switch(instr + F_OFFSET) 
    { 
      /* NOTE: The prefix handling is not needed in computed-goto mode. */ 
      /* 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 += (unsigned INT32)(pc++)[0]<<24; 
      /* FALLTHRU */ 
      case F_PREFIX_WORDX256: 
        prefix += (unsigned INT32)(pc++)[0]<<16; 
      /* FALLTHRU */ 
      case F_PREFIX_CHARX256: 
        prefix += (pc++)[0]<<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 += (unsigned INT32)(pc++)[0]<<24; 
      /* FALLTHRU */ 
      case F_PREFIX2_WORDX256: 
        prefix2 += (unsigned INT32)(pc++)[0]<<16; 
      /* FALLTHRU */ 
      case F_PREFIX2_CHARX256: 
        prefix2 += (pc++)[0]<<8; 
      break; 
 
 
#define INTERPRETER 
 
#define OPCODE0(OP, DESC, FLAGS, CODE) CASE(OP); CODE; DONE 
#define OPCODE1(OP, DESC, FLAGS, CODE) CASE(OP); { \ 
    arg1=GET_ARG(); \ 
    FETCH; \ 
    CODE; \ 
  } DONE 
 
#define OPCODE2(OP, DESC, FLAGS, CODE) CASE(OP); { \ 
    arg1=GET_ARG(); \ 
    arg2=GET_ARG2(); \ 
    FETCH; \ 
    CODE; \ 
  } DONE 
 
#define OPCODE0_ALIAS(OP, DESC, FLAGS, FUN) OPCODE0(OP, DESC, FLAGS, {FUN();}) 
#define OPCODE1_ALIAS(OP, DESC, FLAGS, FUN) OPCODE1(OP, DESC, FLAGS, {FUN(arg1);}) 
#define OPCODE2_ALIAS(OP, DESC, FLAGS, FUN) OPCODE2(OP, DESC, FLAGS, {FUN(arg1, arg2);}) 
 
#define OPCODE0_TAIL(OP, DESC, FLAGS, CODE) CASE(OP); CODE 
#define OPCODE1_TAIL(OP, DESC, FLAGS, CODE) CASE(OP); CODE 
#define OPCODE2_TAIL(OP, DESC, FLAGS, CODE) CASE(OP); CODE 
 
#define OPCODE0_JUMP          OPCODE0 
#define OPCODE1_JUMP          OPCODE1 
#define OPCODE2_JUMP          OPCODE2 
#define OPCODE0_TAILJUMP      OPCODE0_TAIL 
#define OPCODE1_TAILJUMP      OPCODE1_TAIL 
#define OPCODE2_TAILJUMP      OPCODE2_TAIL 
 
#define OPCODE0_RETURN(OP, DESC, FLAGS, CODE) OPCODE0(OP, DESC, FLAGS | I_RETURN, CODE) 
#define OPCODE1_RETURN(OP, DESC, FLAGS, CODE) OPCODE1(OP, DESC, FLAGS | I_RETURN, CODE) 
#define OPCODE2_RETURN(OP, DESC, FLAGS, CODE) OPCODE2(OP, DESC, FLAGS | I_RETURN, CODE) 
#define OPCODE0_TAILRETURN(OP, DESC, FLAGS, CODE) OPCODE0_TAIL(OP, DESC, FLAGS | I_RETURN, CODE) 
#define OPCODE1_TAILRETURN(OP, DESC, FLAGS, CODE) OPCODE1_TAIL(OP, DESC, FLAGS | I_RETURN, CODE) 
#define OPCODE2_TAILRETURN(OP, DESC, FLAGS, CODE) OPCODE2_TAIL(OP, DESC, FLAGS | I_RETURN, CODE) 
 
#define OPCODE0_PTRJUMP(OP, DESC, FLAGS, CODE) CASE(OP); CODE; DONE 
#define OPCODE0_TAILPTRJUMP(OP, DESC, FLAGS, CODE) CASE(OP); CODE 
 
/* These are something of a special case as they 
 * requires a POINTER stored explicitly after 
 * the instruction itself. 
 */ 
#define OPCODE1_PTRJUMP(OP, DESC, FLAGS, CODE) CASE(OP); { \ 
    arg1=GET_ARG(); \ 
    FETCH; \ 
    CODE; \ 
  } DONE 
 
#define OPCODE2_PTRJUMP(OP, DESC, FLAGS, CODE) CASE(OP); { \ 
    arg1=GET_ARG(); \ 
    arg2=GET_ARG2(); \ 
    FETCH; \ 
    CODE; \ 
  } DONE 
 
#define OPCODE1_TAILPTRJUMP(OP, DESC, FLAGS, CODE) CASE(OP); CODE 
#define OPCODE2_TAILPTRJUMP(OP, DESC, FLAGS, CODE) CASE(OP); CODE 
 
#define OPCODE0_BRANCH                OPCODE0_PTRJUMP 
#define OPCODE1_BRANCH                OPCODE1_PTRJUMP 
#define OPCODE2_BRANCH                OPCODE2_PTRJUMP 
#define OPCODE0_TAILBRANCH    OPCODE0_TAILPTRJUMP 
#define OPCODE1_TAILBRANCH    OPCODE1_TAILPTRJUMP 
#define OPCODE2_TAILBRANCH    OPCODE2_TAILPTRJUMP 
 
#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ >= 7 
# define ADVERTISE_FALLTHROUGH ATTRIBUTE((fallthrough)); 
#else 
# define ADVERTISE_FALLTHROUGH 
#endif 
 
#include "interpret_functions.h" 
 
#undef ADVERTISE_FALLTHROUGH 
 
    default: 
      Pike_fatal("Strange instruction %ld\n",(long)instr); 
    } 
  } 
 
  UNREACHABLE(); 
 
}