ruby/insns.def

/* -*- mode:c; style:ruby; coding: utf-8 -*-
  insns.def - YARV instruction definitions

  $Author: $
  created at: 04/01/01 01:17:55 JST

  Copyright (C) 2004-2007 Koichi Sasada
  Massive rewrite by @shyouhei in 2017.
 */

/* Some comments about this file's contents:

   - The new format aims to be editable by C editor of your choice;
     your mileage might vary of course.

   - Each instructions are in following format:

     DEFINE_INSN
     instruction_name
     (type operand, type operand, ..)
     (pop_values, ..)
     (return values ..)
     // attr type name contents..
     {
       .. // insn body
     }

   - Unlike the old format which was line-oriented, you can now place
     newlines and comments at liberal positions.

   - `DEFINE_INSN` is a keyword.

   - An instruction name must be a valid C identifier.

   - Operands, pop values, return values are series of either variable
     declarations, keyword `void`, or keyword `...`.  They are much
     like C function declarations.

   - Attribute pragmas are optional, and can include arbitrary C
     expressions.  You can write anything there but as of writing,
     supported attributes are:

       * sp_inc: Used to dynamically calculate sp increase in
         `insn_stack_increase`.

       * handles_frame: If it is true, VM moves pc before insn body.

   - Attributes can access operands, but not stack (push/pop) variables.

   - An instruction's body is a pure C block, copied verbatimly into
     the generated C source code.
 */

/* nop */
DEFINE_INSN
nop
()
()
()
{
    /* none */
}

/**********************************************************/
/* deal with variables                                    */
/**********************************************************/

/* Get local variable (pointed by `idx' and `level').
     'level' indicates the nesting depth from the current block.
 */
DEFINE_INSN
getlocal
(lindex_t idx, rb_num_t level)
()
(VALUE val)
{
    val = *(vm_get_ep(GET_EP(), level) - idx);
    RB_DEBUG_COUNTER_INC(lvar_get);
    (void)RB_DEBUG_COUNTER_INC_IF(lvar_get_dynamic, level > 0);
}

/* Set a local variable (pointed to by 'idx') as val.
     'level' indicates the nesting depth from the current block.
 */
DEFINE_INSN
setlocal
(lindex_t idx, rb_num_t level)
(VALUE val)
()
{
    vm_env_write(vm_get_ep(GET_EP(), level), -(int)idx, val);
    RB_DEBUG_COUNTER_INC(lvar_set);
    (void)RB_DEBUG_COUNTER_INC_IF(lvar_set_dynamic, level > 0);
}

/* Get a block parameter. */
DEFINE_INSN
getblockparam
(lindex_t idx, rb_num_t level)
()
(VALUE val)
{
    const VALUE *ep = vm_get_ep(GET_EP(), level);
    VM_ASSERT(VM_ENV_LOCAL_P(ep));

    if (!VM_ENV_FLAGS(ep, VM_FRAME_FLAG_MODIFIED_BLOCK_PARAM)) {
	val = rb_vm_bh_to_procval(ec, VM_ENV_BLOCK_HANDLER(ep));
	vm_env_write(ep, -(int)idx, val);
	VM_ENV_FLAGS_SET(ep, VM_FRAME_FLAG_MODIFIED_BLOCK_PARAM);
    }
    else {
	val = *(ep - idx);
	RB_DEBUG_COUNTER_INC(lvar_get);
	(void)RB_DEBUG_COUNTER_INC_IF(lvar_get_dynamic, level > 0);
    }
}

/* Set block parameter. */
DEFINE_INSN
setblockparam
(lindex_t idx, rb_num_t level)
(VALUE val)
()
{
    const VALUE *ep = vm_get_ep(GET_EP(), level);
    VM_ASSERT(VM_ENV_LOCAL_P(ep));

    vm_env_write(ep, -(int)idx, val);
    RB_DEBUG_COUNTER_INC(lvar_set);
    (void)RB_DEBUG_COUNTER_INC_IF(lvar_set_dynamic, level > 0);

    VM_ENV_FLAGS_SET(ep, VM_FRAME_FLAG_MODIFIED_BLOCK_PARAM);
}

/* Get special proxy object which only responds to `call` method if the block parameter
     represents a iseq/ifunc block. Otherwise, same as `getblockparam`.
 */
DEFINE_INSN
getblockparamproxy
(lindex_t idx, rb_num_t level)
()
(VALUE val)
{
    const VALUE *ep = vm_get_ep(GET_EP(), level);
    VM_ASSERT(VM_ENV_LOCAL_P(ep));

    if (!VM_ENV_FLAGS(ep, VM_FRAME_FLAG_MODIFIED_BLOCK_PARAM)) {
	VALUE block_handler = VM_ENV_BLOCK_HANDLER(ep);

	if (block_handler) {
	    switch (vm_block_handler_type(block_handler)) {
	      case block_handler_type_iseq:
	      case block_handler_type_ifunc:
		val = rb_block_param_proxy;
		break;
	      case block_handler_type_symbol:
		val = rb_sym_to_proc(VM_BH_TO_SYMBOL(block_handler));
		goto INSN_LABEL(set);
	      case block_handler_type_proc:
		val = VM_BH_TO_PROC(block_handler);
		goto INSN_LABEL(set);
	      default:
		VM_UNREACHABLE(getblockparamproxy);
	    }
	}
	else {
	    val = Qnil;
	  INSN_LABEL(set):
	    vm_env_write(ep, -(int)idx, val);
	    VM_ENV_FLAGS_SET(ep, VM_FRAME_FLAG_MODIFIED_BLOCK_PARAM);
	}
    }
    else {
	val = *(ep - idx);
	RB_DEBUG_COUNTER_INC(lvar_get);
	(void)RB_DEBUG_COUNTER_INC_IF(lvar_get_dynamic, level > 0);
    }
}

/* Get value of special local variable ($~, $_, ..). */
DEFINE_INSN
getspecial
(rb_num_t key, rb_num_t type)
()
(VALUE val)
{
    val = vm_getspecial(ec, GET_LEP(), key, type);
}

/* Set value of special local variable ($~, $_, ...) to obj. */
DEFINE_INSN
setspecial
(rb_num_t key)
(VALUE obj)
()
{
    lep_svar_set(ec, GET_LEP(), key, obj);
}

/* Get value of instance variable id of self. */
DEFINE_INSN
getinstancevariable
(ID id, IC ic)
()
(VALUE val)
{
    val = vm_getinstancevariable(GET_SELF(), id, ic);
}

/* Set value of instance variable id of self to val. */
DEFINE_INSN
setinstancevariable
(ID id, IC ic)
(VALUE val)
()
{
    vm_setinstancevariable(GET_SELF(), id, val, ic);
}

/* Get value of class variable id of klass as val. */
DEFINE_INSN
getclassvariable
(ID id)
()
(VALUE val)
{
    val = rb_cvar_get(vm_get_cvar_base(rb_vm_get_cref(GET_EP()), GET_CFP()), id);
}

/* Set value of class variable id of klass as val. */
DEFINE_INSN
setclassvariable
(ID id)
(VALUE val)
()
{
    vm_ensure_not_refinement_module(GET_SELF());
    rb_cvar_set(vm_get_cvar_base(rb_vm_get_cref(GET_EP()), GET_CFP()), id, val);
}

/* Get constant variable id. If klass is Qnil, constants
   are searched in the current scope. If klass is Qfalse, constants
   are searched as top level constants. Otherwise, get constant under klass
   class or module.
 */
DEFINE_INSN
getconstant
(ID id)
(VALUE klass)
(VALUE val)
{
    val = vm_get_ev_const(ec, klass, id, 0);
}

/* Set constant variable id. If klass is Qfalse, constant
   is able to access in this scope. if klass is Qnil, set
   top level constant. otherwise, set constant under klass
   class or module.
 */
DEFINE_INSN
setconstant
(ID id)
(VALUE val, VALUE cbase)
()
{
    vm_check_if_namespace(cbase);
    vm_ensure_not_refinement_module(GET_SELF());
    rb_const_set(cbase, id, val);
}

/* get global variable id. */
DEFINE_INSN
getglobal
(GENTRY entry)
()
(VALUE val)
{
    val = GET_GLOBAL((VALUE)entry);
}

/* set global variable id as val. */
DEFINE_INSN
setglobal
(GENTRY entry)
(VALUE val)
()
{
    SET_GLOBAL((VALUE)entry, val);
}

/**********************************************************/
/* deal with values                                       */
/**********************************************************/

/* put nil to stack. */
DEFINE_INSN
putnil
()
()
(VALUE val)
{
    val = Qnil;
}

/* put self. */
DEFINE_INSN
putself
()
()
(VALUE val)
{
    val = GET_SELF();
}

/* put some object.
     i.e. Fixnum, true, false, nil, and so on.
 */
DEFINE_INSN
putobject
(VALUE val)
()
(VALUE val)
{
    /* */
}

/* put special object.  "value_type" is for expansion. */
DEFINE_INSN
putspecialobject
(rb_num_t value_type)
()
(VALUE val)
{
    enum vm_special_object_type type;

    type = (enum vm_special_object_type)value_type;
    val = vm_get_special_object(GET_EP(), type);
}

/* put iseq value. */
DEFINE_INSN
putiseq
(ISEQ iseq)
()
(VALUE ret)
{
    ret = (VALUE)iseq;
}

/* put string val. string will be copied. */
DEFINE_INSN
putstring
(VALUE str)
()
(VALUE val)
{
    val = rb_str_resurrect(str);
}

/* put concatenate strings */
DEFINE_INSN
concatstrings
(rb_num_t num)
(...)
(VALUE val)
// attr rb_snum_t sp_inc = 1 - num;
{
    val = rb_str_concat_literals(num, STACK_ADDR_FROM_TOP(num));
}

/* push the result of to_s. */
DEFINE_INSN
tostring
()
(VALUE val, VALUE str)
(VALUE val)
{
    VALUE rb_obj_as_string_result(VALUE str, VALUE obj);
    val = rb_obj_as_string_result(str, val);
}

/* Freeze (dynamically) created strings. if debug_info is given, set it. */
DEFINE_INSN
freezestring
(VALUE debug_info)
(VALUE str)
(VALUE str)
{
    vm_freezestring(str, debug_info);
}

/* compile str to Regexp and push it.
     opt is the option for the Regexp.
 */
DEFINE_INSN
toregexp
(rb_num_t opt, rb_num_t cnt)
(...)
(VALUE val)
// attr rb_snum_t sp_inc = 1 - cnt;
{
    VALUE rb_reg_new_ary(VALUE ary, int options);
    VALUE rb_ary_tmp_new_from_values(VALUE, long, const VALUE *);
    const VALUE ary = rb_ary_tmp_new_from_values(0, cnt, STACK_ADDR_FROM_TOP(cnt));
    val = rb_reg_new_ary(ary, (int)opt);
    rb_ary_clear(ary);
}

/* intern str to Symbol and push it. */
DEFINE_INSN
intern
()
(VALUE str)
(VALUE sym)
{
    sym = rb_str_intern(str);
}

/* put new array initialized with num values on the stack. */
DEFINE_INSN
newarray
(rb_num_t num)
(...)
(VALUE val)
// attr rb_snum_t sp_inc = 1 - num;
{
    val = rb_ary_new4(num, STACK_ADDR_FROM_TOP(num));
}

/* dup array */
DEFINE_INSN
duparray
(VALUE ary)
()
(VALUE val)
{
    val = rb_ary_resurrect(ary);
}

/* if TOS is an array expand, expand it to num objects.
     if the number of the array is less than num, push nils to fill.
     if it is greater than num, exceeding elements are dropped.
     unless TOS is an array, push num - 1 nils.
     if flags is non-zero, push the array of the rest elements.
     flag: 0x01 - rest args array
     flag: 0x02 - for postarg
     flag: 0x04 - reverse?
 */
DEFINE_INSN
expandarray
(rb_num_t num, rb_num_t flag)
(..., VALUE ary)
(...)
// attr rb_snum_t sp_inc = num - 1 + (flag & 1 ? 1 : 0);
{
    vm_expandarray(GET_SP(), ary, num, (int)flag);
}

/* concat two arrays */
DEFINE_INSN
concatarray
()
(VALUE ary1, VALUE ary2)
(VALUE ary)
{
    ary = vm_concat_array(ary1, ary2);
}

/* call to_a on array ary to splat */
DEFINE_INSN
splatarray
(VALUE flag)
(VALUE ary)
(VALUE obj)
{
    obj = vm_splat_array(flag, ary);
}

/* put new Hash from n elements. n must be an even number. */
DEFINE_INSN
newhash
(rb_num_t num)
(...)
(VALUE val)
// attr rb_snum_t sp_inc = 1 - num;
{
    RUBY_DTRACE_CREATE_HOOK(HASH, num);

    val = rb_hash_new_with_size(num / 2);

    if (num) {
        rb_hash_bulk_insert(num, STACK_ADDR_FROM_TOP(num), val);
    }
}

/* put new Range object.(Range.new(low, high, flag)) */
DEFINE_INSN
newrange
(rb_num_t flag)
(VALUE low, VALUE high)
(VALUE val)
{
    val = rb_range_new(low, high, (int)flag);
}

/**********************************************************/
/* deal with stack operation                              */
/**********************************************************/

/* pop from stack. */
DEFINE_INSN
pop
()
(VALUE val)
()
{
    (void)val;
    /* none */
}

/* duplicate stack top. */
DEFINE_INSN
dup
()
(VALUE val)
(VALUE val1, VALUE val2)
{
    val1 = val2 = val;
}

/* duplicate stack top n elements */
DEFINE_INSN
dupn
(rb_num_t n)
(...)
(...)
// attr rb_snum_t sp_inc = n;
{
    void *dst = GET_SP();
    void *src = STACK_ADDR_FROM_TOP(n);

    MEMCPY(dst, src, VALUE, n);
}

/* swap top 2 vals */
DEFINE_INSN
swap
()
(VALUE val, VALUE obj)
(VALUE obj, VALUE val)
{
    /* none */
}

/* reverse stack top N order. */
DEFINE_INSN
reverse
(rb_num_t n)
(...)
(...)
// attr rb_snum_t sp_inc = 0;
{
    rb_num_t i;
    VALUE *sp = STACK_ADDR_FROM_TOP(n);

    for (i=0; i<n/2; i++) {
	VALUE v0 = sp[i];
	VALUE v1 = TOPN(i);
	sp[i] = v1;
	TOPN(i) = v0;
    }
}

/* for stack caching. */
DEFINE_INSN
reput
()
(..., VALUE val)
(VALUE val)
// attr rb_snum_t sp_inc = 0;
{
    /* none */
}

/* get nth stack value from stack top */
DEFINE_INSN
topn
(rb_num_t n)
(...)
(VALUE val)
// attr rb_snum_t sp_inc = 1;
{
    val = TOPN(n);
}

/* set Nth stack entry to stack top */
DEFINE_INSN
setn
(rb_num_t n)
(..., VALUE val)
(VALUE val)
// attr rb_snum_t sp_inc = 0;
{
    TOPN(n) = val;
}

/* empty current stack */
DEFINE_INSN
adjuststack
(rb_num_t n)
(...)
(...)
// attr rb_snum_t sp_inc = -(rb_snum_t)n;
{
    /* none */
}

/**********************************************************/
/* deal with setting                                      */
/**********************************************************/

/* defined? */
DEFINE_INSN
defined
(rb_num_t op_type, VALUE obj, VALUE needstr)
(VALUE v)
(VALUE val)
{
    val = vm_defined(ec, GET_CFP(), op_type, obj, needstr, v);
}

/* check `target' matches `pattern'.
     `flag & VM_CHECKMATCH_TYPE_MASK' describe how to check pattern.
      VM_CHECKMATCH_TYPE_WHEN: ignore target and check pattern is truthy.
      VM_CHECKMATCH_TYPE_CASE: check `patten === target'.
      VM_CHECKMATCH_TYPE_RESCUE: check `pattern.kind_op?(Module) && pattern == target'.
     if `flag & VM_CHECKMATCH_ARRAY' is not 0, then `patten' is array of patterns.
 */
DEFINE_INSN
checkmatch
(rb_num_t flag)
(VALUE target, VALUE pattern)
(VALUE result)
{
    result = vm_check_match(ec, target, pattern, flag);
}

/* check keywords are specified or not. */
DEFINE_INSN
checkkeyword
(lindex_t kw_bits_index, lindex_t keyword_index)
()
(VALUE ret)
{
    ret = vm_check_keyword(kw_bits_index, keyword_index, GET_EP());
}

/* check if val is type. */
DEFINE_INSN
checktype
(rb_num_t type)
(VALUE val)
(VALUE ret)
{
    ret = (TYPE(val) == (int)type) ? Qtrue : Qfalse;
}

/* fire a coverage event (currently, this is used for line coverage and branch coverage) */
DEFINE_INSN
tracecoverage
(rb_num_t nf, VALUE data)
()
()
{
    rb_event_flag_t flag = (rb_event_flag_t)nf;

    vm_dtrace(flag, ec);
    EXEC_EVENT_HOOK(ec, flag, GET_SELF(), 0, 0, 0 /* id and klass are resolved at callee */, data);
}

/**********************************************************/
/* deal with control flow 1: class/module                 */
/**********************************************************/

/* enter class definition scope. if super is Qfalse, and class
   "klass" is defined, it's redefine. otherwise, define "klass" class.
 */
DEFINE_INSN
defineclass
(ID id, ISEQ class_iseq, rb_num_t flags)
(VALUE cbase, VALUE super)
(VALUE val)
// attr bool handles_frame = true;
{
    VALUE klass = vm_find_or_create_class_by_id(id, flags, cbase, super);

    rb_iseq_check(class_iseq);

    /* enter scope */
    vm_push_frame(ec, class_iseq, VM_FRAME_MAGIC_CLASS | VM_ENV_FLAG_LOCAL, klass,
		  GET_BLOCK_HANDLER(),
		  (VALUE)vm_cref_push(ec, klass, NULL, FALSE),
		  class_iseq->body->iseq_encoded, GET_SP(),
		  class_iseq->body->local_table_size,
		  class_iseq->body->stack_max);
    RESTORE_REGS();
    NEXT_INSN();
}

/**********************************************************/
/* deal with control flow 2: method/iterator              */
/**********************************************************/

/* invoke method. */
DEFINE_INSN
send
(CALL_INFO ci, CALL_CACHE cc, ISEQ blockiseq)
(...)
(VALUE val)
// attr bool handles_frame = true;
// attr rb_snum_t sp_inc = - (int)(ci->orig_argc + ((ci->flag & VM_CALL_ARGS_BLOCKARG) ? 1 : 0));
{
    struct rb_calling_info calling;

    vm_caller_setup_arg_block(ec, reg_cfp, &calling, ci, blockiseq, FALSE);
    vm_search_method(ci, cc, calling.recv = TOPN(calling.argc = ci->orig_argc));
    CALL_METHOD(&calling, ci, cc);
}

DEFINE_INSN
opt_str_freeze
(VALUE str)
()
(VALUE val)
{
    if (BASIC_OP_UNREDEFINED_P(BOP_FREEZE, STRING_REDEFINED_OP_FLAG)) {
	val = str;
    }
    else {
	val = rb_funcall(rb_str_resurrect(str), idFreeze, 0);
    }
}

DEFINE_INSN
opt_str_uminus
(VALUE str)
()
(VALUE val)
{
    if (BASIC_OP_UNREDEFINED_P(BOP_UMINUS, STRING_REDEFINED_OP_FLAG)) {
	val = str;
    }
    else {
	val = rb_funcall(rb_str_resurrect(str), idUMinus, 0);
    }
}

DEFINE_INSN
opt_newarray_max
(rb_num_t num)
(...)
(VALUE val)
// attr rb_snum_t sp_inc = 1 - num;
{
    val = vm_opt_newarray_max(num, STACK_ADDR_FROM_TOP(num));
}

DEFINE_INSN
opt_newarray_min
(rb_num_t num)
(...)
(VALUE val)
// attr rb_snum_t sp_inc = 1 - num;
{
    val = vm_opt_newarray_min(num, STACK_ADDR_FROM_TOP(num));
}

/* Invoke method without block */
DEFINE_INSN
opt_send_without_block
(CALL_INFO ci, CALL_CACHE cc)
(...)
(VALUE val)
// attr bool handles_frame = true;
// attr rb_snum_t sp_inc = -ci->orig_argc;
{
    struct rb_calling_info calling;
    calling.block_handler = VM_BLOCK_HANDLER_NONE;
    vm_search_method(ci, cc, calling.recv = TOPN(calling.argc = ci->orig_argc));
    CALL_METHOD(&calling, ci, cc);
}

/* super(args) # args.size => num */
DEFINE_INSN
invokesuper
(CALL_INFO ci, CALL_CACHE cc, ISEQ blockiseq)
(...)
(VALUE val)
// attr bool handles_frame = true;
// attr rb_snum_t sp_inc = - (int)(ci->orig_argc + ((ci->flag & VM_CALL_ARGS_BLOCKARG) ? 1 : 0));
{
    struct rb_calling_info calling;
    calling.argc = ci->orig_argc;

    vm_caller_setup_arg_block(ec, reg_cfp, &calling, ci, blockiseq, TRUE);
    calling.recv = GET_SELF();
    vm_search_super_method(ec, GET_CFP(), &calling, ci, cc);
    CALL_METHOD(&calling, ci, cc);
}

/* yield(args) */
DEFINE_INSN
invokeblock
(CALL_INFO ci)
(...)
(VALUE val)
// attr bool handles_frame = true;
// attr rb_snum_t sp_inc = 1 - ci->orig_argc;
{
    struct rb_calling_info calling;
    VALUE block_handler;

    calling.argc = ci->orig_argc;
    calling.block_handler = VM_BLOCK_HANDLER_NONE;
    calling.recv = Qundef; /* should not be used */

    block_handler = VM_CF_BLOCK_HANDLER(GET_CFP());
    if (block_handler == VM_BLOCK_HANDLER_NONE) {
	rb_vm_localjump_error("no block given (yield)", Qnil, 0);
    }

    val = vm_invoke_block(ec, GET_CFP(), &calling, ci, block_handler);
    if (val == Qundef) {
        EXEC_EC_CFP(val);
    }
}

/* return from this scope. */
DEFINE_INSN
leave
()
(VALUE val)
(VALUE val)
// attr bool handles_frame = true;
{
    if (OPT_CHECKED_RUN) {
	const VALUE *const bp = vm_base_ptr(reg_cfp);
	if (reg_cfp->sp != bp) {
	    vm_stack_consistency_error(ec, reg_cfp, bp);
	}
    }

    RUBY_VM_CHECK_INTS(ec);

    if (vm_pop_frame(ec, GET_CFP(), GET_EP())) {
#if OPT_CALL_THREADED_CODE
	rb_ec_thread_ptr(ec)->retval = val;
	return 0;
#else
	return val;
#endif
    }
    else {
	RESTORE_REGS();
    }
}

/**********************************************************/
/* deal with control flow 3: exception                    */
/**********************************************************/

/* longjump */
DEFINE_INSN
throw
(rb_num_t throw_state)
(VALUE throwobj)
(VALUE val)
{
    RUBY_VM_CHECK_INTS(ec);
    val = vm_throw(ec, GET_CFP(), throw_state, throwobj);
    THROW_EXCEPTION(val);
    /* unreachable */
}

/**********************************************************/
/* deal with control flow 4: local jump                   */
/**********************************************************/

/* set PC to (PC + dst). */
DEFINE_INSN
jump
(OFFSET dst)
()
()
{
    RUBY_VM_CHECK_INTS(ec);
    JUMP(dst);
}

/* if val is not false or nil, set PC to (PC + dst). */
DEFINE_INSN
branchif
(OFFSET dst)
(VALUE val)
()
{
    if (RTEST(val)) {
	RUBY_VM_CHECK_INTS(ec);
	JUMP(dst);
    }
}

/* if val is false or nil, set PC to (PC + dst). */
DEFINE_INSN
branchunless
(OFFSET dst)
(VALUE val)
()
{
    if (!RTEST(val)) {
	RUBY_VM_CHECK_INTS(ec);
	JUMP(dst);
    }
}

/* if val is nil, set PC to (PC + dst). */
DEFINE_INSN
branchnil
(OFFSET dst)
(VALUE val)
()
{
    if (NIL_P(val)) {
	RUBY_VM_CHECK_INTS(ec);
	JUMP(dst);
    }
}

/**********************************************************/
/* for optimize                                           */
/**********************************************************/

/* push inline-cached value and go to dst if it is valid */
DEFINE_INSN
getinlinecache
(OFFSET dst, IC ic)
()
(VALUE val)
{
    if (vm_ic_hit_p(ic, GET_EP())) {
	val = ic->ic_value.value;
	JUMP(dst);
    }
    else {
	val = Qnil;
    }
}

/* set inline cache */
DEFINE_INSN
setinlinecache
(IC ic)
(VALUE val)
(VALUE val)
{
    vm_ic_update(ic, val, GET_EP());
}

/* run iseq only once */
DEFINE_INSN
once
(ISEQ iseq, ISE ise)
()
(VALUE val)
{
    val = vm_once_dispatch(ec, iseq, ise);
}

/* case dispatcher, jump by table if possible */
DEFINE_INSN
opt_case_dispatch
(CDHASH hash, OFFSET else_offset)
(..., VALUE key)
()
// attr rb_snum_t sp_inc = -1;
{
    OFFSET dst = vm_case_dispatch(hash, else_offset, key);

    if (dst) {
	JUMP(dst);
    }
}

/** simple functions */

/* optimized X+Y. */
DEFINE_INSN
opt_plus
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_plus(recv, obj);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized X-Y. */
DEFINE_INSN
opt_minus
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_minus(recv, obj);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized X*Y. */
DEFINE_INSN
opt_mult
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_mult(recv, obj);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized X/Y. */
DEFINE_INSN
opt_div
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_div(recv, obj);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized X%Y. */
DEFINE_INSN
opt_mod
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_mod(recv, obj);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized X==Y. */
DEFINE_INSN
opt_eq
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = opt_eq_func(recv, obj, ci, cc);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized X!=Y. */
DEFINE_INSN
opt_neq
(CALL_INFO ci_eq, CALL_CACHE cc_eq, CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_neq(ci, cc, ci_eq, cc_eq, recv, obj);

    if (val == Qundef) {
#ifndef MJIT_HEADER
	ADD_PC(2); /* !!! */
#endif
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized X<Y. */
DEFINE_INSN
opt_lt
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_lt(recv, obj);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized X<=Y. */
DEFINE_INSN
opt_le
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_le(recv, obj);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized X>Y. */
DEFINE_INSN
opt_gt
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_gt(recv, obj);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized X>=Y. */
DEFINE_INSN
opt_ge
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_ge(recv, obj);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* << */
DEFINE_INSN
opt_ltlt
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_ltlt(recv, obj);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* [] */
DEFINE_INSN
opt_aref
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj)
(VALUE val)
{
    val = vm_opt_aref(recv, obj);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* recv[obj] = set */
DEFINE_INSN
opt_aset
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE obj, VALUE set)
(VALUE val)
{
    val = vm_opt_aset(recv, obj, set);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* recv[str] = set */
DEFINE_INSN
opt_aset_with
(VALUE key, CALL_INFO ci, CALL_CACHE cc)
(VALUE recv, VALUE val)
(VALUE val)
{
    VALUE tmp = vm_opt_aset_with(recv, key, val);

    if (tmp != Qundef) {
	val = tmp;
    }
    else {
#ifndef MJIT_HEADER
	TOPN(0) = rb_str_resurrect(key);
	PUSH(val);
	ADD_PC(1); /* !!! */
#endif
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* recv[str] */
DEFINE_INSN
opt_aref_with
(VALUE key, CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
{
    val = vm_opt_aref_with(recv, key);

    if (val == Qundef) {
#ifndef MJIT_HEADER
	PUSH(rb_str_resurrect(key));
	ADD_PC(1); /* !!! */
#endif
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized length */
DEFINE_INSN
opt_length
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
{
    val = vm_opt_length(recv, BOP_LENGTH);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized size */
DEFINE_INSN
opt_size
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
{
    val = vm_opt_length(recv, BOP_SIZE);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized empty? */
DEFINE_INSN
opt_empty_p
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
{
    val = vm_opt_empty_p(recv);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized succ */
DEFINE_INSN
opt_succ
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
{
    val = vm_opt_succ(recv);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized not */
DEFINE_INSN
opt_not
(CALL_INFO ci, CALL_CACHE cc)
(VALUE recv)
(VALUE val)
{
    val = vm_opt_not(ci, cc, recv);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* optimized regexp match */
DEFINE_INSN
opt_regexpmatch1
(VALUE recv)
(VALUE obj)
(VALUE val)
{
    val = vm_opt_regexpmatch1(recv, obj);
}

/* optimized regexp match 2 */
DEFINE_INSN
opt_regexpmatch2
(CALL_INFO ci, CALL_CACHE cc)
(VALUE obj2, VALUE obj1)
(VALUE val)
{
    val = vm_opt_regexpmatch2(obj2, obj1);

    if (val == Qundef) {
	DISPATCH_ORIGINAL_INSN(opt_send_without_block);
    }
}

/* call native compiled method */
DEFINE_INSN
opt_call_c_function
(rb_insn_func_t funcptr)
()
()
// attr bool handles_frame = true;
{
    reg_cfp = (funcptr)(ec, reg_cfp);

    if (reg_cfp == 0) {
	VALUE err = ec->errinfo;
	ec->errinfo = Qnil;
	THROW_EXCEPTION(err);
    }

    RESTORE_REGS();
    NEXT_INSN();
}

/* BLT */
DEFINE_INSN
bitblt
()
()
(VALUE ret)
{
    ret = rb_str_new2("a bit of bacon, lettuce and tomato");
}

/* The Answer to Life, the Universe, and Everything */
DEFINE_INSN
answer
()
()
(VALUE ret)
{
    ret = INT2FIX(42);
}