void jit_function::insn_memcpy
(const jit_value& dest, const jit_value& src, const jit_value& size)
{
if(!jit_insn_memcpy(func, dest.raw(), src.raw(), size.raw()))
{
out_of_memory();
}
}
/*@
* @deftypefun int _jit_create_call_setup_insns (jit_function_t @var{func}, jit_type_t @var{signature}, jit_value_t *@var{args}, unsigned int @var{num_args}, int @var{is_nested}, int @var{nested_level}, jit_value_t *@var{struct_return}, int @var{flags})
* Create instructions within @var{func} necessary to set up for a
* function call to a function with the specified @var{signature}.
* Use @code{jit_insn_push} to push values onto the system stack,
* or @code{jit_insn_outgoing_reg} to copy values into call registers.
*
* If @var{is_nested} is non-zero, then it indicates that we are calling a
* nested function within the current function's nested relationship tree.
* The @var{nested_level} value will be -1 to call a child, zero to call a
* sibling of @var{func}, 1 to call a sibling of the parent, 2 to call
* a sibling of the grandparent, etc. The @code{jit_insn_setup_for_nested}
* instruction should be used to create the nested function setup code.
*
* If the function returns a structure by pointer, then @var{struct_return}
* must be set to a new local variable that will contain the returned
* structure. Otherwise it should be set to NULL.
* @end deftypefun
@*/
int _jit_create_call_setup_insns
(jit_function_t func, jit_type_t signature,
jit_value_t *args, unsigned int num_args,
int is_nested, int nested_level, jit_value_t *struct_return, int flags)
{
jit_type_t type;
jit_type_t vtype;
jit_value_t value;
unsigned int arg_num;
jit_nint offset;
jit_nuint size;
/* Regular or tail call? */
if((flags & JIT_CALL_TAIL) == 0)
{
/* Push all of the arguments in reverse order */
while(num_args > 0)
{
--num_args;
type = jit_type_get_param(signature, num_args);
type = jit_type_remove_tags(type);
if(type->kind == JIT_TYPE_STRUCT || type->kind == JIT_TYPE_UNION)
{
/* If the value is a pointer, then we are pushing a structure
argument by pointer rather than by local variable */
vtype = jit_type_normalize(jit_value_get_type(args[num_args]));
if(vtype->kind <= JIT_TYPE_MAX_PRIMITIVE)
{
if(!jit_insn_push_ptr(func, args[num_args], type))
{
return 0;
}
continue;
}
}
if(!jit_insn_push(func, args[num_args]))
{
return 0;
}
}
/* Do we need to add a structure return pointer argument? */
type = jit_type_get_return(signature);
if(jit_type_return_via_pointer(type))
{
value = jit_value_create(func, type);
if(!value)
{
return 0;
}
*struct_return = value;
value = jit_insn_address_of(func, value);
if(!value)
{
return 0;
}
if(!jit_insn_push(func, value))
{
return 0;
}
}
else if((flags & JIT_CALL_NATIVE) != 0)
{
/* Native calls always return a return area pointer */
if(!jit_insn_push_return_area_ptr(func))
{
return 0;
}
*struct_return = 0;
}
else
{
*struct_return = 0;
}
/* Do we need to add nested function scope information? */
if(is_nested)
{
if(!jit_insn_setup_for_nested(func, nested_level, -1))
{
return 0;
}
}
}
else
{
/* Copy the arguments into our own parameter slots */
offset = -1;
if(func->nested_parent)
{
offset -= 2;
}
type = jit_type_get_return(signature);
if(jit_type_return_via_pointer(type))
{
--offset;
}
for(arg_num = 0; arg_num < num_args; ++arg_num)
{
type = jit_type_get_param(signature, arg_num);
value = jit_value_create(func, type);
if(!value)
{
return 0;
}
if(!jit_insn_outgoing_frame_posn(func, value, offset))
{
return 0;
}
type = jit_type_remove_tags(type);
size = jit_type_get_size(type);
offset -= (jit_nint)(JIT_NUM_ITEMS_IN_STRUCT(size));
if(type->kind == JIT_TYPE_STRUCT || type->kind == JIT_TYPE_UNION)
{
/* If the value is a pointer, then we are pushing a structure
argument by pointer rather than by local variable */
vtype = jit_type_normalize(jit_value_get_type(args[arg_num]));
if(vtype->kind <= JIT_TYPE_MAX_PRIMITIVE)
{
value = jit_insn_address_of(func, value);
if(!value)
{
return 0;
}
if(!jit_insn_memcpy
(func, value, args[arg_num],
jit_value_create_nint_constant
(func, jit_type_nint, (jit_nint)size)))
{
return 0;
}
continue;
}
}
if(!jit_insn_store(func, value, args[arg_num]))
{
return 0;
}
}
*struct_return = 0;
}
/* The call is ready to proceed */
return 1;
}
