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py/persistentcode: Pack qstrs directly in bytecode to reduce mpy size.

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Instead of emitting two bytes in the bytecode for where the linked qstr
should be written to, it is now replaced by the actual qstr data, or a
reference into the qstr window.

Reduces mpy file size by about 10%.
This commit is contained in:
Damien George
2019-03-01 14:03:10 +11:00
parent 5996eeb48f
commit 992a6e1dea
4 changed files with 135 additions and 49 deletions
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6
py/bc.c
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@@ -382,7 +382,7 @@ STATIC const byte opcode_format_table[64] = {
#undef V
#undef O
uint mp_opcode_format(const byte *ip, size_t *opcode_size) {
uint mp_opcode_format(const byte *ip, size_t *opcode_size, bool count_var_uint) {
uint f = (opcode_format_table[*ip >> 2] >> (2 * (*ip & 3))) & 3;
const byte *ip_start = ip;
if (f == MP_OPCODE_QSTR) {
@@ -403,7 +403,9 @@ uint mp_opcode_format(const byte *ip, size_t *opcode_size) {
);
ip += 1;
if (f == MP_OPCODE_VAR_UINT) {
while ((*ip++ & 0x80) != 0) {
if (count_var_uint) {
while ((*ip++ & 0x80) != 0) {
}
}
} else if (f == MP_OPCODE_OFFSET) {
ip += 2;