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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/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 */