YourWishes/jerryscript
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Parser improvements.

Browse Source 
The number of delete opcodes is reduced to two from six. The
range of numbers which can be included in the byte code is
doubled from (-127,127) to (-256,256).

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2016-06-09 05:52:17 -07:00
parent 3c83af9f23
commit eed84a7dd9
8 changed files with 79 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files
jerry-core/parser/js/byte-code.h
+8 -14
View File
@@ -144,10 +144,10 @@
*/
#define CBC_NO_RESULT_OPERATION(opcode) \
((opcode) >= CBC_DELETE && (opcode) < CBC_END)
((opcode) >= CBC_PRE_INCR && (opcode) < CBC_END)
#define CBC_NO_RESULT_BLOCK(opcode) \
((opcode) >= CBC_DELETE && (opcode) < CBC_ASSIGN_ADD)
((opcode) >= CBC_PRE_INCR && (opcode) < CBC_ASSIGN_ADD)
#define CBC_NO_RESULT_COMPOUND_ASSIGMENT(opcode) \
((opcode) >= CBC_ASSIGN_ADD && (opcode) < CBC_END)
@@ -271,9 +271,11 @@
CBC_OPCODE (CBC_PUSH_THIS_LITERAL, CBC_HAS_LITERAL_ARG, 2, \
VM_OC_PUSH_TWO | VM_OC_GET_THIS_LITERAL) \
CBC_OPCODE (CBC_PUSH_NUMBER_0, CBC_NO_FLAG, 1, \
VM_OC_PUSH_NUMBER | VM_OC_PUT_STACK) \
CBC_OPCODE (CBC_PUSH_NUMBER_1, CBC_HAS_BYTE_ARG, 1, \
VM_OC_PUSH_NUMBER | VM_OC_PUT_STACK) \
VM_OC_PUSH_NUMBER_0 | VM_OC_PUT_STACK) \
CBC_OPCODE (CBC_PUSH_NUMBER_POS_BYTE, CBC_HAS_BYTE_ARG, 1, \
VM_OC_PUSH_NUMBER_POS_BYTE | VM_OC_PUT_STACK) \
CBC_OPCODE (CBC_PUSH_NUMBER_NEG_BYTE, CBC_HAS_BYTE_ARG, 1, \
VM_OC_PUSH_NUMBER_NEG_BYTE | VM_OC_PUT_STACK) \
CBC_OPCODE (CBC_PUSH_PROP, CBC_NO_FLAG, -1, \
VM_OC_PROP_GET | VM_OC_GET_STACK_STACK | VM_OC_PUT_STACK) \
CBC_OPCODE (CBC_PUSH_PROP_LITERAL, CBC_HAS_LITERAL_ARG, 0, \
@@ -376,18 +378,10 @@
MOD) \
\
/* Unary lvalue opcodes. */ \
CBC_OPCODE (CBC_DELETE, CBC_NO_FLAG, -2, \
VM_OC_PROP_DELETE | VM_OC_GET_STACK_STACK) \
CBC_OPCODE (CBC_DELETE_PUSH_RESULT, CBC_NO_FLAG, -1, \
VM_OC_PROP_DELETE | VM_OC_GET_STACK_STACK | VM_OC_PUT_STACK) \
CBC_OPCODE (CBC_DELETE_BLOCK, CBC_NO_FLAG, -2, \
VM_OC_PROP_DELETE | VM_OC_GET_STACK_STACK | VM_OC_PUT_BLOCK) \
CBC_OPCODE (CBC_DELETE_IDENT, CBC_HAS_LITERAL_ARG, 0, \
VM_OC_DELETE) \
CBC_OPCODE (CBC_DELETE_IDENT_PUSH_RESULT, CBC_HAS_LITERAL_ARG, 1, \
VM_OC_DELETE | VM_OC_PUT_STACK) \
CBC_OPCODE (CBC_DELETE_IDENT_BLOCK, CBC_HAS_LITERAL_ARG, 0, \
VM_OC_DELETE | VM_OC_PUT_BLOCK) \
CBC_UNARY_LVALUE_OPERATION (CBC_PRE_INCR, \
PRE_INCR) \
CBC_UNARY_LVALUE_OPERATION (CBC_PRE_DECR, \
@@ -597,7 +591,7 @@
#define CBC_MAXIMUM_SMALL_VALUE 510
#define CBC_MAXIMUM_FULL_VALUE 32767
#define CBC_PUSH_NUMBER_1_RANGE_END 128
#define CBC_PUSH_NUMBER_BYTE_RANGE_END 256
#define CBC_HIGHEST_BIT_MASK 0x80
#define CBC_LOWER_SEVEN_BIT_MASK 0x7f
jerry-core/parser/js/js-lexer.c
+1 -1
View File
@@ -1553,7 +1553,7 @@ lexer_construct_number_object (parser_context_t *context_p, /**< context */
if (int_num == num)
{
if (int_num < CBC_PUSH_NUMBER_1_RANGE_END
if (int_num <= CBC_PUSH_NUMBER_BYTE_RANGE_END
&& (int_num != 0 || !is_negative_number))
{
context_p->lit_object.index = (uint16_t) int_num;
jerry-core/parser/js/js-lexer.h
+1 -1
View File
@@ -185,7 +185,7 @@ typedef enum
((((token_type) - LEXER_PLUS) * 2) + CBC_PLUS)
#define LEXER_UNARY_LVALUE_OP_TOKEN_TO_OPCODE(token_type) \
((((token_type) - LEXER_KEYW_DELETE) * 6) + CBC_DELETE)
((((token_type) - LEXER_INCREASE) * 6) + CBC_PRE_INCR)
#define LEXER_BINARY_OP_TOKEN_TO_OPCODE(token_type) \
((cbc_opcode_t) ((((token_type) - LEXER_BIT_OR) * 3) + CBC_BIT_OR))
jerry-core/parser/js/js-parser-expr.c
+37 -8
View File
@@ -88,8 +88,6 @@ parser_emit_unary_lvalue_opcode (parser_context_t *context_p, /**< context */
if (PARSER_IS_PUSH_LITERAL (context_p->last_cbc_opcode)
&& context_p->last_cbc.literal_type == LEXER_IDENT_LITERAL)
{
JERRY_ASSERT (CBC_SAME_ARGS (CBC_PUSH_LITERAL, opcode + CBC_UNARY_LVALUE_WITH_IDENT));
if (context_p->status_flags & PARSER_IS_STRICT)
{
if (context_p->last_cbc.literal_object_type != LEXER_LITERAL_OBJECT_ANY)
@@ -107,17 +105,41 @@ parser_emit_unary_lvalue_opcode (parser_context_t *context_p, /**< context */
}
parser_raise_error (context_p, error);
}
if (opcode == CBC_DELETE)
if (opcode == CBC_DELETE_PUSH_RESULT)
{
parser_raise_error (context_p, PARSER_ERR_DELETE_IDENT_NOT_ALLOWED);
}
}
if (opcode == CBC_DELETE)
if (opcode == CBC_DELETE_PUSH_RESULT)
{
context_p->status_flags |= PARSER_LEXICAL_ENV_NEEDED;
if (context_p->last_cbc_opcode == CBC_PUSH_LITERAL)
{
context_p->last_cbc_opcode = CBC_DELETE_IDENT_PUSH_RESULT;
}
else if (context_p->last_cbc_opcode == CBC_PUSH_TWO_LITERALS)
{
context_p->last_cbc_opcode = CBC_PUSH_LITERAL;
parser_emit_cbc_literal (context_p,
CBC_DELETE_IDENT_PUSH_RESULT,
context_p->last_cbc.value);
}
else
{
JERRY_ASSERT (context_p->last_cbc_opcode == CBC_PUSH_THREE_LITERALS);
context_p->last_cbc_opcode = CBC_PUSH_TWO_LITERALS;
parser_emit_cbc_literal (context_p,
CBC_DELETE_IDENT_PUSH_RESULT,
context_p->last_cbc.third_literal_index);
}
return;
}
JERRY_ASSERT (CBC_SAME_ARGS (CBC_PUSH_LITERAL, opcode + CBC_UNARY_LVALUE_WITH_IDENT));
if (context_p->last_cbc_opcode == CBC_PUSH_LITERAL)
{
context_p->last_cbc_opcode = (uint16_t) (opcode + CBC_UNARY_LVALUE_WITH_IDENT);
@@ -169,8 +191,8 @@ parser_emit_unary_lvalue_opcode (parser_context_t *context_p, /**< context */
default:
{
/* Invalid LeftHandSide expression. */
parser_emit_cbc_ext (context_p, (opcode == CBC_DELETE) ? CBC_EXT_PUSH_UNDEFINED_BASE
: CBC_EXT_THROW_REFERENCE_ERROR);
parser_emit_cbc_ext (context_p, (opcode == CBC_DELETE_PUSH_RESULT) ? CBC_EXT_PUSH_UNDEFINED_BASE
: CBC_EXT_THROW_REFERENCE_ERROR);
break;
}
}
@@ -505,7 +527,7 @@ parser_parse_unary_expression (parser_context_t *context_p, /**< context */
if (lexer_construct_number_object (context_p, PARSER_TRUE, is_negative_number))
{
JERRY_ASSERT (context_p->lit_object.index < CBC_PUSH_NUMBER_1_RANGE_END);
JERRY_ASSERT (context_p->lit_object.index <= CBC_PUSH_NUMBER_BYTE_RANGE_END);
if (context_p->lit_object.index == 0)
{
@@ -949,7 +971,14 @@ parser_process_unary_expression (parser_context_t *context_p) /**< context */
if (LEXER_IS_UNARY_LVALUE_OP_TOKEN (token))
{
token = (uint8_t) (LEXER_UNARY_LVALUE_OP_TOKEN_TO_OPCODE (token));
if (token == LEXER_KEYW_DELETE)
{
token = CBC_DELETE_PUSH_RESULT;
}
else
{
token = (uint8_t) (LEXER_UNARY_LVALUE_OP_TOKEN_TO_OPCODE (token));
}
parser_emit_unary_lvalue_opcode (context_p, (cbc_opcode_t) token);
}
else
jerry-core/parser/js/js-parser-util.c
+6 -11
View File
@@ -310,8 +310,10 @@ parser_emit_cbc_push_number (parser_context_t *context_p, /**< context */
parser_flush_cbc (context_p);
}
JERRY_ASSERT (value < CBC_PUSH_NUMBER_1_RANGE_END);
JERRY_ASSERT (CBC_STACK_ADJUST_VALUE (cbc_flags[CBC_PUSH_NUMBER_1]) == 1);
cbc_opcode_t opcode = is_negative_number ? CBC_PUSH_NUMBER_NEG_BYTE : CBC_PUSH_NUMBER_POS_BYTE;
JERRY_ASSERT (value > 0 && value <= CBC_PUSH_NUMBER_BYTE_RANGE_END);
JERRY_ASSERT (CBC_STACK_ADJUST_VALUE (cbc_flags[opcode]) == 1);
context_p->stack_depth++;
@@ -325,18 +327,11 @@ parser_emit_cbc_push_number (parser_context_t *context_p, /**< context */
real_value = -real_value;
}
printf (" [%3d] %s number:%d\n", (int) context_p->stack_depth, cbc_names[CBC_PUSH_NUMBER_1], real_value);
printf (" [%3d] %s number:%d\n", (int) context_p->stack_depth, cbc_names[opcode], real_value);
}
#endif /* PARSER_DUMP_BYTE_CODE */
if (is_negative_number)
{
PARSER_PLUS_EQUAL_U16 (value, CBC_PUSH_NUMBER_1_RANGE_END);
}
parser_emit_two_bytes (context_p,
CBC_PUSH_NUMBER_1,
(uint8_t) value);
parser_emit_two_bytes (context_p, opcode, (uint8_t) (value - 1));
context_p->byte_code_size += 2;
jerry-core/parser/js/js-parser.c
+8 -7
View File
@@ -1135,16 +1135,17 @@ parse_print_final_cbc (ecma_compiled_code_t *compiled_code_p, /**< compiled code
continue;
}
if (opcode == CBC_PUSH_NUMBER_1)
if (opcode == CBC_PUSH_NUMBER_POS_BYTE)
{
int value = *byte_code_p++;
printf (" number:%d\n", value + 1);
continue;
}
if (value >= CBC_PUSH_NUMBER_1_RANGE_END)
{
value = -(value - CBC_PUSH_NUMBER_1_RANGE_END);
}
printf (" number:%d\n", value);
if (opcode == CBC_PUSH_NUMBER_NEG_BYTE)
{
int value = *byte_code_p++;
printf (" number:%d\n", -(value + 1));
continue;
}
}
jerry-core/vm/vm.c
+15 -21
View File
@@ -910,28 +910,22 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
result = ecma_copy_value (frame_ctx_p->this_binding);
break;
}
case VM_OC_PUSH_NUMBER:
case VM_OC_PUSH_NUMBER_0:
{
ecma_integer_value_t number;
if (opcode == CBC_PUSH_NUMBER_0)
{
number = 0;
}
else
{
number = *byte_code_p++;
JERRY_ASSERT (opcode == CBC_PUSH_NUMBER_1);
if (number >= CBC_PUSH_NUMBER_1_RANGE_END)
{
number = -(number - CBC_PUSH_NUMBER_1_RANGE_END);
}
}
result = ecma_make_integer_value (number);
break;
*stack_top_p++ = ecma_make_integer_value (0);
continue;
}
case VM_OC_PUSH_NUMBER_POS_BYTE:
{
ecma_integer_value_t number = *byte_code_p++;
*stack_top_p++ = ecma_make_integer_value (number + 1);
continue;
}
case VM_OC_PUSH_NUMBER_NEG_BYTE:
{
ecma_integer_value_t number = *byte_code_p++;
*stack_top_p++ = ecma_make_integer_value (-(number + 1));
continue;
}
case VM_OC_PUSH_OBJECT:
{
jerry-core/vm/vm.h
+3 -1
View File
@@ -115,7 +115,9 @@ typedef enum
VM_OC_PUSH_FALSE, /**< push false value */
VM_OC_PUSH_NULL, /**< push null value */
VM_OC_PUSH_THIS, /**< push this */
VM_OC_PUSH_NUMBER, /**< push number */
VM_OC_PUSH_NUMBER_0, /**< push number zero */
VM_OC_PUSH_NUMBER_POS_BYTE, /**< push number between 1 and 256 */
VM_OC_PUSH_NUMBER_NEG_BYTE, /**< push number between -1 and -256 */
VM_OC_PUSH_OBJECT, /**< push object */
VM_OC_SET_PROPERTY, /**< set property */
VM_OC_SET_GETTER, /**< set getter */