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Parser improvements.

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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
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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