Lerking/micropython
1
0
Fork 0
mirror of https://github.com/micropython/micropython.git synced 2026-01-07 12:40:15 +01:00
Code Issues Actions 27 Packages Projects Releases Wiki Activity

py: Use variable length encoded uints in more places in bytecode.

Browse Source 
Code-info size, block name, source name, n_state and n_exc_stack now use
variable length encoded uints.  This saves 7-9 bytes per bytecode
function for most functions.
This commit is contained in:
Damien George
2014-09-04 14:44:01 +01:00
parent dda46460ff
commit b534e1b9f1
8 changed files with 329 additions and 244 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
py/objgenerator.c
View File

@@ -57,15 +57,14 @@ STATIC mp_obj_t gen_wrap_call(mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw
mp_obj_fun_bc_t *self_fun = (mp_obj_fun_bc_t*)self->fun;
assert(MP_OBJ_IS_TYPE(self_fun, &mp_type_fun_bc));
const byte *bytecode = self_fun->bytecode;
// get code info size, and skip the line number table
mp_uint_t code_info_size = bytecode[0] | (bytecode[1] << 8) | (bytecode[2] << 16) | (bytecode[3] << 24);
bytecode += code_info_size;
// skip code-info block
const byte *code_info = self_fun->bytecode;
mp_uint_t code_info_size = mp_decode_uint(&code_info);
const byte *ip = self_fun->bytecode + code_info_size;
// bytecode prelude: get state size and exception stack size
mp_uint_t n_state = bytecode[0] | (bytecode[1] << 8);
mp_uint_t n_exc_stack = bytecode[2] | (bytecode[3] << 8);
bytecode += 4;
mp_uint_t n_state = mp_decode_uint(&ip);
mp_uint_t n_exc_stack = mp_decode_uint(&ip);
// allocate the generator object, with room for local stack and exception stack
mp_obj_gen_instance_t *o = m_new_obj_var(mp_obj_gen_instance_t, byte,
@@ -74,7 +73,7 @@ STATIC mp_obj_t gen_wrap_call(mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw
o->globals = self_fun->globals;
o->code_state.n_state = n_state;
o->code_state.ip = bytecode;
o->code_state.ip = ip;
mp_setup_code_state(&o->code_state, self_fun, n_args, n_kw, args);
return o;
}