Add jump_if_not_zero and bnez instructions

This commit is contained in:
2025-11-19 10:25:41 +01:00
parent 76f55d0796
commit fd9e8a36b5
2 changed files with 120 additions and 74 deletions

View File

@@ -4317,12 +4317,21 @@ var
parser_node: Word;
declaration_size: Word;
result: Word;
token_kind: Word;
begin
declaration_size := _module_declaration_size();
result := _allocate(declaration_size);
_node_set_kind(result, NodeKind.module_declaration);
_skip_empty_lines();
_elna_lexer_read_token(@token_kind);
if token_kind = ElnaLexerKind._program then
_elna_lexer_skip_token();
_elna_lexer_read_token(@token_kind);
_elna_lexer_skip_token()
end;
parser_node := _elna_parser_type_part();
_module_declaration_set_types(result, parser_node);
@@ -5161,8 +5170,14 @@ begin
result := ElnaLexerKind._record
elsif _string_compare(position_start, token_length, "or", 2) then
result := ElnaLexerKind._or
elsif _string_compare(position_start, token_length, "xor", 2) then
elsif _string_compare(position_start, token_length, "xor", 3) then
result := ElnaLexerKind._xor
elsif _string_compare(position_start, token_length, "program", 7) then
result := ElnaLexerKind._program
elsif _string_compare(position_start, token_length, "module", 6) then
result := ElnaLexerKind._module
elsif _string_compare(position_start, token_length, "nil", 3) then
result := ElnaLexerKind.null
end;
return result
end;

View File

@@ -3,6 +3,7 @@
* v. 2.0. If a copy of the MPL was not distributed with this file, You can
* obtain one at https://mozilla.org/MPL/2.0/.
*)
program;
(* Stage 16 compiler. *)
@@ -351,29 +352,30 @@ type
ElnaTacOperator = (
get_address,
add,
load_word,
store_word,
jal,
assign,
sub,
div,
rem,
mul,
load,
store,
proc_call,
copy,
subtract,
divide,
remainder,
multiply,
_xor,
_or,
and,
slt,
sgt,
sle,
sge,
seq,
sne,
neg,
not,
less_than,
greater_than,
less_or_equal,
greater_or_equal,
equal,
not_equal,
negate,
complement,
jump,
beqz,
jump_if_zero,
jump_if_not_zero,
label,
ret
_return
);
ElnaRtlOperator = (
li,
@@ -397,8 +399,9 @@ type
xori,
neg,
not,
jump,
j,
beqz,
bnez,
label,
allocate_stack,
ret
@@ -965,6 +968,17 @@ begin
elna_rtl_instruction_set_operand(rtl_instruction, number, operand_type, operand_value, operand_length)
end;
proc elna_rtl_conditional_jump(tac_instruction: Word, condition: Word);
var
result: Word;
begin
result := elna_rtl_instruction_create(condition);
elna_rtl_copy_operand(tac_instruction, 1, result);
elna_rtl_copy_operand(tac_instruction, 2, result);
return result
end;
proc elna_rtl_instruction(tac_instruction: Word, next_instruction: Word);
var
result: Word;
@@ -1003,7 +1017,7 @@ begin
end
elsif instruction_kind = ElnaTacOperator.add then
result := elna_rtl_binary_arithmetic(tac_instruction, next_instruction, ElnaRtlOperator.add)
elsif instruction_kind = ElnaTacOperator.load_word then
elsif instruction_kind = ElnaTacOperator.load then
operand_type := _elna_tac_instruction_get_operand_type(tac_instruction, 2);
if operand_type = ElnaTacOperand.stack then
@@ -1024,7 +1038,7 @@ begin
operand_value := _elna_tac_instruction_get_operand_value(tac_instruction, 2);
elna_rtl_instruction_set_operand(result, 2, ElnaRtlOperand.offset, operand_value, 0)
end
elsif instruction_kind = ElnaTacOperator.store_word then
elsif instruction_kind = ElnaTacOperator.store then
operands := elna_rtl_load_operand_value(tac_instruction, 1, ElnaRtlRegister.t0);
next_instruction^ := elna_rtl_instruction_create(ElnaRtlOperator.sw);
result := operands;
@@ -1045,16 +1059,16 @@ begin
else
ElnaInstructionList_set_next(operands, next_instruction^)
end
elsif instruction_kind = ElnaTacOperator.jal then
elsif instruction_kind = ElnaTacOperator.proc_call then
result := elna_rtl_instruction_create(ElnaRtlOperator.jal);
elna_rtl_copy_operand(tac_instruction, 1, result)
elsif instruction_kind = ElnaTacOperator.sub then
elsif instruction_kind = ElnaTacOperator.subtract then
result := elna_rtl_binary_arithmetic(tac_instruction, next_instruction, ElnaRtlOperator.sub)
elsif instruction_kind = ElnaTacOperator.mul then
elsif instruction_kind = ElnaTacOperator.multiply then
result := elna_rtl_binary_arithmetic(tac_instruction, next_instruction, ElnaRtlOperator.mul)
elsif instruction_kind = ElnaTacOperator.div then
elsif instruction_kind = ElnaTacOperator.divide then
result := elna_rtl_binary_arithmetic(tac_instruction, next_instruction, ElnaRtlOperator.div)
elsif instruction_kind = ElnaTacOperator.rem then
elsif instruction_kind = ElnaTacOperator.remainder then
result := elna_rtl_binary_arithmetic(tac_instruction, next_instruction, ElnaRtlOperator.rem)
elsif instruction_kind = ElnaTacOperator._xor then
result := elna_rtl_binary_arithmetic(tac_instruction, next_instruction, ElnaRtlOperator._xor)
@@ -1062,9 +1076,9 @@ begin
result := elna_rtl_binary_arithmetic(tac_instruction, next_instruction, ElnaRtlOperator._or)
elsif instruction_kind = ElnaTacOperator.and then
result := elna_rtl_binary_arithmetic(tac_instruction, next_instruction, ElnaRtlOperator.and)
elsif instruction_kind = ElnaTacOperator.slt then
elsif instruction_kind = ElnaTacOperator.less_than then
result := elna_rtl_binary_arithmetic(tac_instruction, next_instruction, ElnaRtlOperator.slt)
elsif instruction_kind = ElnaTacOperator.sgt then
elsif instruction_kind = ElnaTacOperator.greater_than then
operands := elna_rtl_binary_operands(tac_instruction, next_instruction);
result := elna_rtl_instruction_create(ElnaRtlOperator.slt);
@@ -1077,7 +1091,7 @@ begin
result := operands;
elna_rtl_instruction_set_kind(next_instruction^, ElnaRtlOperator.slt)
elsif instruction_kind = ElnaTacOperator.sle then
elsif instruction_kind = ElnaTacOperator.less_or_equal then
operands := elna_rtl_binary_operands(tac_instruction, next_instruction);
intermediate_instruction := elna_rtl_instruction_create(ElnaRtlOperator.slt);
@@ -1096,7 +1110,7 @@ begin
result := operands;
elna_rtl_instruction_set_kind(next_instruction^, ElnaRtlOperator.xori)
elsif instruction_kind = ElnaTacOperator.sge then
elsif instruction_kind = ElnaTacOperator.greater_or_equal then
operands := elna_rtl_binary_operands(tac_instruction, next_instruction);
intermediate_instruction := elna_rtl_instruction_create(ElnaRtlOperator.slt);
@@ -1115,31 +1129,31 @@ begin
result := operands;
elna_rtl_instruction_set_kind(next_instruction^, ElnaRtlOperator.xori)
elsif instruction_kind = ElnaTacOperator.seq then
elsif instruction_kind = ElnaTacOperator.equal then
result := elna_rtl_binary_equality(tac_instruction, ElnaRtlOperator.seqz, next_instruction)
elsif instruction_kind = ElnaTacOperator.sne then
elsif instruction_kind = ElnaTacOperator.not_equal then
result := elna_rtl_binary_equality(tac_instruction, ElnaRtlOperator.snez, next_instruction)
elsif instruction_kind = ElnaTacOperator.neg then
elsif instruction_kind = ElnaTacOperator.negate then
result := elna_rtl_instruction_create(ElnaRtlOperator.neg);
elna_rtl_copy_operand(tac_instruction, 1, result);
elna_rtl_copy_operand(tac_instruction, 2, result)
elsif instruction_kind = ElnaTacOperator.not then
elsif instruction_kind = ElnaTacOperator.complement then
result := elna_rtl_instruction_create(ElnaRtlOperator.not);
elna_rtl_copy_operand(tac_instruction, 1, result);
elna_rtl_copy_operand(tac_instruction, 2, result)
elsif instruction_kind = ElnaTacOperator.jump then
result := elna_rtl_instruction_create(ElnaRtlOperator.jump);
result := elna_rtl_instruction_create(ElnaRtlOperator.j);
elna_rtl_copy_operand(tac_instruction, 1, result)
elsif instruction_kind = ElnaTacOperator.beqz then
result := elna_rtl_instruction_create(ElnaRtlOperator.beqz);
elna_rtl_copy_operand(tac_instruction, 1, result);
elna_rtl_copy_operand(tac_instruction, 2, result)
elsif instruction_kind = ElnaTacOperator.ret then
elsif instruction_kind = ElnaTacOperator.jump_if_zero then
result := elna_rtl_conditional_jump(tac_instruction, ElnaRtlOperator.beqz)
elsif instruction_kind = ElnaTacOperator.jump_if_not_zero then
result := elna_rtl_conditional_jump(tac_instruction, ElnaRtlOperator.bnez)
elsif instruction_kind = ElnaTacOperator._return then
result := elna_rtl_load_operand_value(tac_instruction, 1, ElnaRtlRegister.a0)
elsif instruction_kind = ElnaTacOperator.label then
result := elna_rtl_instruction_create(ElnaRtlOperator.label);
elna_rtl_copy_operand(tac_instruction, 1, result)
elsif instruction_kind = ElnaTacOperator.assign then
elsif instruction_kind = ElnaTacOperator.copy then
operand_type := _elna_tac_instruction_get_operand_type(tac_instruction, 1);
operand_value := _elna_tac_instruction_get_operand_value(tac_instruction, 1);
@@ -1262,12 +1276,15 @@ begin
elsif instruction_kind = ElnaRtlOperator.not then
argument_count := 2;
_write_s("\tnot", 4)
elsif instruction_kind = ElnaRtlOperator.jump then
elsif instruction_kind = ElnaRtlOperator.j then
argument_count := 1;
_write_s("\tj", 2)
elsif instruction_kind = ElnaRtlOperator.beqz then
argument_count := 2;
_write_s("\tbeqz", 5)
elsif instruction_kind = ElnaRtlOperator.bnez then
argument_count := 2;
_write_s("\tbnez", 5)
else (* ElnaRtlOperator.allocate_stack or ElnaRtlOperator.ret *)
argument_count := 0
end;
@@ -1800,7 +1817,7 @@ begin
operand := operand_type^;
if is_address then
instruction := _elna_tac_instruction_create(ElnaTacOperator.load_word);
instruction := _elna_tac_instruction_create(ElnaTacOperator.load);
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.temporary, 6, 0);
_elna_tac_instruction_set_operand(instruction, 2, operand_type^, operand_value^, operand_length^);
@@ -1810,7 +1827,7 @@ begin
elna_instruction_list_concatenate(first_instruction, instruction)
else
instruction := _elna_tac_instruction_create(ElnaTacOperator.assign);
instruction := _elna_tac_instruction_create(ElnaTacOperator.copy);
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.temporary, 6, 0);
_elna_tac_instruction_set_operand(instruction, 2, operand_type^, operand_value^, operand_length^);
@@ -1822,12 +1839,12 @@ begin
end
end;
if operator = '-' then
instruction := _elna_tac_instruction_create(ElnaTacOperator.neg);
instruction := _elna_tac_instruction_create(ElnaTacOperator.negate);
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.temporary, 6, 0);
_elna_tac_instruction_set_operand(instruction, 2, ElnaTacOperand.temporary, 6, 0);
elna_instruction_list_concatenate(first_instruction, instruction)
elsif operator = '~' then
instruction := _elna_tac_instruction_create(ElnaTacOperator.not);
instruction := _elna_tac_instruction_create(ElnaTacOperator.complement);
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.temporary, 6, 0);
_elna_tac_instruction_set_operand(instruction, 2, ElnaTacOperand.temporary, 6, 0);
elna_instruction_list_concatenate(first_instruction, instruction)
@@ -1928,7 +1945,7 @@ begin
first_instruction := _elna_tac_unary_expression(operand_node, symbol_table, @lhs_type, @lhs_value, @lhs_length);
(* Save the value of the left expression on the stack. *)
instruction := _elna_tac_instruction_create(ElnaTacOperator.assign);
instruction := _elna_tac_instruction_create(ElnaTacOperator.copy);
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.stack, 72, 0);
_elna_tac_instruction_set_operand(instruction, 2, lhs_type, lhs_value, lhs_length);
@@ -1948,7 +1965,7 @@ begin
current_instruction := elna_instruction_list_concatenate(current_instruction, instruction);
(* Load the left expression from the stack; *)
instruction := _elna_tac_instruction_create(ElnaTacOperator.assign);
instruction := _elna_tac_instruction_create(ElnaTacOperator.copy);
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.temporary, 7, 0);
_elna_tac_instruction_set_operand(instruction, 2, ElnaTacOperand.stack, 72, 0);
@@ -1958,9 +1975,9 @@ begin
if token_kind = ElnaLexerKind.plus then
instruction := _elna_tac_instruction_create(ElnaTacOperator.add)
elsif token_kind = ElnaLexerKind.minus then
instruction := _elna_tac_instruction_create(ElnaTacOperator.sub)
instruction := _elna_tac_instruction_create(ElnaTacOperator.subtract)
elsif token_kind = ElnaLexerKind.multiplication then
instruction := _elna_tac_instruction_create(ElnaTacOperator.mul)
instruction := _elna_tac_instruction_create(ElnaTacOperator.multiply)
elsif token_kind = ElnaLexerKind.and then
instruction := _elna_tac_instruction_create(ElnaTacOperator.and)
elsif token_kind = ElnaLexerKind._or then
@@ -1968,21 +1985,21 @@ begin
elsif token_kind = ElnaLexerKind._xor then
instruction := _elna_tac_instruction_create(ElnaTacOperator._xor)
elsif token_kind = ElnaLexerKind.equals then
instruction := _elna_tac_instruction_create(ElnaTacOperator.seq)
instruction := _elna_tac_instruction_create(ElnaTacOperator.equal)
elsif token_kind = ElnaLexerKind.remainder then
instruction := _elna_tac_instruction_create(ElnaTacOperator.rem)
instruction := _elna_tac_instruction_create(ElnaTacOperator.remainder)
elsif token_kind = ElnaLexerKind.division then
instruction := _elna_tac_instruction_create(ElnaTacOperator.div)
instruction := _elna_tac_instruction_create(ElnaTacOperator.divide)
elsif token_kind = ElnaLexerKind.less_than then
instruction := _elna_tac_instruction_create(ElnaTacOperator.slt)
instruction := _elna_tac_instruction_create(ElnaTacOperator.less_than)
elsif token_kind = ElnaLexerKind.greater_than then
instruction := _elna_tac_instruction_create(ElnaTacOperator.sgt)
instruction := _elna_tac_instruction_create(ElnaTacOperator.greater_than)
elsif token_kind = ElnaLexerKind.less_equal then
instruction := _elna_tac_instruction_create(ElnaTacOperator.sle)
instruction := _elna_tac_instruction_create(ElnaTacOperator.less_or_equal)
elsif token_kind = ElnaLexerKind.greater_equal then
instruction := _elna_tac_instruction_create(ElnaTacOperator.sge)
instruction := _elna_tac_instruction_create(ElnaTacOperator.greater_or_equal)
elsif token_kind = ElnaLexerKind.not_equal then
instruction := _elna_tac_instruction_create(ElnaTacOperator.sne)
instruction := _elna_tac_instruction_create(ElnaTacOperator.not_equal)
end;
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.temporary, 6, 0);
_elna_tac_instruction_set_operand(instruction, 2, ElnaTacOperand.stack, 72, 0);
@@ -2113,7 +2130,7 @@ begin
(* Save the argument on the stack. *)
stack_offset := argument_count * 4;
instruction := _elna_tac_instruction_create(ElnaTacOperator.store_word);
instruction := _elna_tac_instruction_create(ElnaTacOperator.store);
_elna_tac_instruction_set_operand(instruction, 1, operand_type, operand_value, operand_length);
_elna_tac_instruction_set_operand(instruction, 2, ElnaTacOperand.stack, 132 - stack_offset, 0);
if first_instruction = 0 then
@@ -2135,7 +2152,7 @@ begin
stack_offset := argument_count * 4;
(* Calculate the stack offset: 132 - (4 * argument_counter) *)
instruction := _elna_tac_instruction_create(ElnaTacOperator.assign);
instruction := _elna_tac_instruction_create(ElnaTacOperator.copy);
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.temporary, 11 + argument_count, 0);
_elna_tac_instruction_set_operand(instruction, 2, ElnaTacOperand.stack, 132 - stack_offset, 0);
elna_instruction_list_concatenate(current_instruction, instruction);
@@ -2143,7 +2160,7 @@ begin
goto elna_tac_call_finalize
end;
instruction := _elna_tac_instruction_create(ElnaTacOperator.jal);
instruction := _elna_tac_instruction_create(ElnaTacOperator.proc_call);
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.symbol, name, name_length);
if first_instruction = 0 then
first_instruction := instruction
@@ -2319,7 +2336,7 @@ begin
parser_node := _dereference_expression_get_pointer(parser_node);
first_instruction := _elna_tac_simple_expression(parser_node, symbol_table, operand_type, operand_value, operand_length);
last_instruction := _elna_tac_instruction_create(ElnaTacOperator.assign);
last_instruction := _elna_tac_instruction_create(ElnaTacOperator.copy);
_elna_tac_instruction_set_operand(last_instruction, 1, ElnaTacOperand.temporary, 6, 0);
_elna_tac_instruction_set_operand(last_instruction, 2, operand_type^, operand_value^, operand_length^);
@@ -2335,7 +2352,7 @@ begin
elsif node_kind = NodeKind.call then
first_instruction := _elna_tac_call(parser_node, symbol_table);
last_instruction := _elna_tac_instruction_create(ElnaTacOperator.assign);
last_instruction := _elna_tac_instruction_create(ElnaTacOperator.copy);
_elna_tac_instruction_set_operand(last_instruction, 1, ElnaTacOperand.temporary, 6, 0);
_elna_tac_instruction_set_operand(last_instruction, 2, ElnaTacOperand.temporary, 11, 0);
@@ -2397,7 +2414,7 @@ begin
first_instruction := elna_instruction_list_concatenate(first_instruction, current_instruction);
(* Save the assignee address on the stack. *)
current_instruction := _elna_tac_instruction_create(ElnaTacOperator.store_word);
current_instruction := _elna_tac_instruction_create(ElnaTacOperator.store);
_elna_tac_instruction_set_operand(current_instruction, 1, ElnaTacOperand.temporary, 6, 0);
_elna_tac_instruction_set_operand(current_instruction, 2, ElnaTacOperand.stack, 76, 0);
elna_instruction_list_concatenate(first_instruction, current_instruction);
@@ -2414,14 +2431,14 @@ begin
current_instruction := instruction
end;
instruction := _elna_tac_instruction_create(ElnaTacOperator.assign);
instruction := _elna_tac_instruction_create(ElnaTacOperator.copy);
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.temporary, 7, 0);
_elna_tac_instruction_set_operand(instruction, 2, ElnaTacOperand.stack, 76, 0);
elna_instruction_list_concatenate(current_instruction, instruction);
current_instruction := instruction;
instruction := _elna_tac_instruction_create(ElnaTacOperator.store_word);
instruction := _elna_tac_instruction_create(ElnaTacOperator.store);
_elna_tac_instruction_set_operand(instruction, 1, operand_type, operand_value, operand_length);
_elna_tac_instruction_set_operand(instruction, 2, ElnaTacOperand.temporary, 7, 0);
@@ -2466,7 +2483,7 @@ begin
return_expression := _return_statement_get_returned(parser_node);
first_instruction := _elna_tac_binary_expression(return_expression, symbol_table, @operand_type, @operand_value, @operand_length);
instruction := _elna_tac_instruction_create(ElnaTacOperator.ret);
instruction := _elna_tac_instruction_create(ElnaTacOperator._return);
_elna_tac_instruction_set_operand(instruction, 1, operand_type, operand_value, operand_length);
return elna_instruction_list_concatenate(first_instruction, instruction)
@@ -2541,7 +2558,7 @@ begin
condition_label := label_counter;
label_counter := label_counter + 1;
current_instruction := _elna_tac_instruction_create(ElnaTacOperator.beqz);
current_instruction := _elna_tac_instruction_create(ElnaTacOperator.jump_if_zero);
_elna_tac_instruction_set_operand(current_instruction, 1, operand_type, operand_value, operand_length);
_elna_tac_instruction_set_operand(current_instruction, 2, ElnaTacOperand.symbol, condition_label, 0);
@@ -3269,7 +3286,7 @@ begin
symbol_info := _parameter_info_get_offset(symbol_info);
instruction := _elna_tac_instruction_create(ElnaTacOperator.store_word);
instruction := _elna_tac_instruction_create(ElnaTacOperator.store);
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.temporary, 11 + parameter_counter, 0);
_elna_tac_instruction_set_operand(instruction, 2, ElnaTacOperand.stack, symbol_info, 0);
if first_instruction = 0 then
@@ -3700,14 +3717,14 @@ var
next_instruction: Word;
begin
instruction := _elna_tac_accessor(name_pointer, name_length, field_pointer, field_offset, @first_result, "_get_");
next_instruction := _elna_tac_instruction_create(ElnaTacOperator.load_word);
next_instruction := _elna_tac_instruction_create(ElnaTacOperator.load);
_elna_tac_instruction_set_operand(next_instruction, 1, ElnaTacOperand.temporary, 11, 0);
_elna_tac_instruction_set_operand(next_instruction, 2, ElnaTacOperand.temporary, 11, 0);
elna_instruction_list_concatenate(instruction, next_instruction);
ElnaInstructionDeclaration_set_body(first_result, instruction);
instruction := _elna_tac_accessor(name_pointer, name_length, field_pointer, field_offset, @second_result, "_set_");
next_instruction := _elna_tac_instruction_create(ElnaTacOperator.store_word);
next_instruction := _elna_tac_instruction_create(ElnaTacOperator.store);
_elna_tac_instruction_set_operand(next_instruction, 1, ElnaTacOperand.temporary, 12, 0);
_elna_tac_instruction_set_operand(next_instruction, 2, ElnaTacOperand.temporary, 11, 0);
elna_instruction_list_concatenate(instruction, next_instruction);
@@ -3743,7 +3760,7 @@ begin
ElnaInstructionDeclaration_set_name(first_result, new_name);
ElnaInstructionDeclaration_set_length(first_result, new_length);
instruction := _elna_tac_instruction_create(ElnaTacOperator.assign);
instruction := _elna_tac_instruction_create(ElnaTacOperator.copy);
_elna_tac_instruction_set_operand(instruction, 1, ElnaTacOperand.temporary, 11, 0);
_elna_tac_instruction_set_operand(instruction, 2, ElnaTacOperand.immediate, type_size, 0);
@@ -3889,11 +3906,19 @@ proc _elna_parser_module_declaration();
var
parser_node: Word;
result: Word;
token_kind: Word;
begin
result := malloc(_module_declaration_size());
_node_set_kind(result, NodeKind.module_declaration);
(* Skip "program;". *)
_skip_empty_lines();
_elna_lexer_read_token(@token_kind);
_elna_lexer_skip_token();
_elna_lexer_read_token(@token_kind);
_elna_lexer_skip_token();
parser_node := _elna_parser_type_part();
_module_declaration_set_types(result, parser_node);
@@ -4734,8 +4759,14 @@ begin
result := ElnaLexerKind._record
elsif string_compare(position_start, token_length, "or", 2) then
result := ElnaLexerKind._or
elsif string_compare(position_start, token_length, "xor", 2) then
elsif string_compare(position_start, token_length, "xor", 3) then
result := ElnaLexerKind._xor
elsif string_compare(position_start, token_length, "program", 7) then
result := ElnaLexerKind._program
elsif string_compare(position_start, token_length, "module", 6) then
result := ElnaLexerKind._module
elsif string_compare(position_start, token_length, "nil", 3) then
result := ElnaLexerKind.null
end;
return result
end;