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type_double.e
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1999-06-05
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-- This file is part of SmallEiffel The GNU Eiffel Compiler.
-- Copyright (C) 1994-98 LORIA - UHP - CRIN - INRIA - FRANCE
-- Dominique COLNET and Suzanne COLLIN - colnet@loria.fr
-- http://SmallEiffel.loria.fr
-- SmallEiffel is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 2, or (at your option) any later
-- version. SmallEiffel is distributed in the hope that it will be useful,but
-- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details. You should have received a copy of the GNU General
-- Public License along with SmallEiffel; see the file COPYING. If not,
-- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-- Boston, MA 02111-1307, USA.
--
class TYPE_DOUBLE
--
-- Handling of DOUBLE type mark.
--
inherit
TYPE_BASIC_EIFFEL_EXPANDED
redefine is_double
end;
creation make
feature
is_double: BOOLEAN is true;
id: INTEGER is 5;
feature
make(sp: like start_position) is
do
!!base_class_name.make(as_double,sp);
end;
used_as_reference is
once
load_ref(as_double_ref);
end;
space_for_variable, space_for_object: INTEGER is
do
Result := (0.0).to_double.object_size;
end;
is_a(other: TYPE): BOOLEAN is
do
if other.is_double then
Result := true;
elseif base_class.is_subclass_of(other.base_class) then
Result := true;
used_as_reference;
end;
if not Result then
eh.add_type(Current,fz_inako);
eh.add_type(other,fz_dot);
end;
end;
smallest_ancestor(other: TYPE): TYPE is
local
rto: TYPE;
do
rto := other.run_type;
if rto.is_integer then
Result := Current;
elseif rto.is_real then
Result := Current;
elseif rto.is_double then
Result := Current;
else
Result := type_double_ref.smallest_ancestor(rto);
end;
end;
to_runnable(rt: TYPE): like Current is
do
Result := Current;
check_type;
end;
written_mark, run_time_mark: STRING is
do
Result := as_double
end;
c_type_for_argument_in(str: STRING) is
do
str.extend('T');
str.extend('5');
end;
cast_to_ref is
do
type_double_ref.mapping_cast;
end;
jvm_descriptor_in(str: STRING) is
do
str.extend('D');
end;
jvm_return_code is
do
code_attribute.opcode_dreturn;
end;
jvm_push_local(offset: INTEGER) is
do
code_attribute.opcode_dload(offset);
end;
jvm_push_default: INTEGER is
do
code_attribute.opcode_dconst_0;
Result := 2;
end;
jvm_write_local(offset: INTEGER) is
do
code_attribute.opcode_dstore(offset);
end;
jvm_xnewarray is
do
code_attribute.opcode_newarray(7);
end;
jvm_xastore is
do
code_attribute.opcode_dastore;
end;
jvm_xaload is
do
code_attribute.opcode_daload;
end;
jvm_if_x_eq: INTEGER is
local
ca: like code_attribute;
do
ca := code_attribute;
ca.opcode_dcmpg;
Result := ca.opcode_ifeq;
end;
jvm_if_x_ne: INTEGER is
local
ca: like code_attribute;
do
ca := code_attribute;
ca.opcode_dcmpg;
Result := ca.opcode_ifne;
end;
jvm_to_reference is
local
rc: RUN_CLASS;
idx: INTEGER;
ca: like code_attribute;
do
ca := code_attribute;
rc := type_double_ref.run_class;
rc.jvm_basic_new;
ca.opcode_dup_x2;
ca.opcode_dup_x2;
ca.opcode_pop;
idx := rc.jvm_constant_pool_index;
idx := constant_pool.idx_fieldref4(idx,as_item,fz_77);
ca.opcode_putfield(idx,-3);
end;
jvm_expanded_from_reference(other: TYPE): INTEGER is
local
rc: RUN_CLASS;
idx: INTEGER;
ca: like code_attribute;
do
ca := code_attribute;
rc := type_double_ref.run_class;
rc.opcode_checkcast;
idx := rc.jvm_constant_pool_index;
idx := constant_pool.idx_fieldref4(idx,as_item,fz_77);
ca.opcode_getfield(idx,1);
Result := 2;
end;
jvm_convert_to(destination: TYPE): INTEGER is
do
if destination.is_reference then
jvm_to_reference;
Result := 1;
elseif destination.is_real then
code_attribute.opcode_d2f
Result := 1;
elseif destination.is_integer then
code_attribute.opcode_d2i
Result := 1;
else
check
destination.is_double
end;
Result := 2;
end;
end;
to_reference is
do
cpp.to_reference(Current,type_double_ref);
end;
to_expanded is
do
cpp.to_expanded(type_double_ref,Current);
end;
feature {NONE}
check_type is
-- Do some checking for type DOUBLE.
local
bc: BASE_CLASS;
rc: RUN_CLASS;
once
bc := base_class;
if nb_errors = 0 then
rc := run_class;
end;
if nb_errors = 0 then
if not bc.is_expanded then
error(start_position,"DOUBLE must be expanded.");
end;
end;
end;
invariant
written_mark = as_double
end -- TYPE_DOUBLE