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py: implement POP_BLOCK in VM.

This commit is contained in:
Damien 2013-12-29 18:48:37 +00:00
parent 319b28a355
commit 02a7c41e76
1 changed files with 7 additions and 2 deletions
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9
py/vm.c
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@ -272,6 +272,7 @@ bool mp_execute_byte_code_2(const byte **ip_in_out, mp_obj_t *fastn, mp_obj_t **
break;
*/
// matched against: POP_BLOCK or POP_EXCEPT (anything else?)
case MP_BC_SETUP_EXCEPT:
DECODE_ULABEL; // except labels are always forward
*++exc_sp = (machine_uint_t)ip + unum;
@ -303,11 +304,15 @@ bool mp_execute_byte_code_2(const byte **ip_in_out, mp_obj_t *fastn, mp_obj_t **
}
break;
// matched against: SETUP_EXCEPT, SETUP_FINALLY, SETUP_WITH
case MP_BC_POP_BLOCK:
// pops block and restores the stack
assert(0);
// we are exiting an exception handler, so pop the last one of the exception-stack
assert(exc_sp >= &exc_stack[0]);
currently_in_except_block = (exc_sp[0] & 1); // restore previous state
exc_sp -= 2; // pop back to previous exception handler
break;
// matched againts: SETUP_EXCEPT
case MP_BC_POP_EXCEPT:
// TODO need to work out how blocks work etc
// pops block, checks it's an exception block, and restores the stack, saving the 3 exception values to local threadstate