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py: Small code space optimisations for memoryview slice assigment. 

Also adds #if guards to allow uPy core to compile without memoryview
enabled, but with slice assignment enabled.
This commit is contained in:
Damien George 2015-07-20 16:12:26 +01:00
parent cceff157dd
commit 4915c2b871
1 changed files with 13 additions and 9 deletions
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22
py/objarray.c
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@ -374,7 +374,8 @@ STATIC mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value
mp_uint_t src_len;
void *src_items;
size_t item_sz = mp_binary_get_size('@', o->typecode & TYPECODE_MASK, NULL);
if (MP_OBJ_IS_TYPE(value, &mp_type_array) || MP_OBJ_IS_TYPE(value, &mp_type_bytearray)) {
if (MP_OBJ_IS_OBJ(value) && ((mp_obj_base_t*)value)->type->subscr == array_subscr) {
// value is array, bytearray or memoryview
mp_obj_array_t *src_slice = value;
if (item_sz != mp_binary_get_size('@', src_slice->typecode & TYPECODE_MASK, NULL)) {
compat_error:
@ -382,6 +383,11 @@ STATIC mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value
}
src_len = src_slice->len;
src_items = src_slice->items;
#if MICROPY_PY_BUILTINS_MEMORYVIEW
if (MP_OBJ_IS_TYPE(value, &mp_type_memoryview)) {
src_items = (uint8_t*)src_items + (src_slice->free * item_sz);
}
#endif
} else if (MP_OBJ_IS_TYPE(value, &mp_type_bytes)) {
if (item_sz != 1) {
goto compat_error;
@ -390,13 +396,6 @@ STATIC mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value
mp_get_buffer_raise(value, &bufinfo, MP_BUFFER_READ);
src_len = bufinfo.len;
src_items = bufinfo.buf;
} else if (MP_OBJ_IS_TYPE(value, &mp_type_memoryview)) {
mp_obj_array_t *src_slice = value;
if (item_sz != mp_binary_get_size('@', src_slice->typecode & TYPECODE_MASK, NULL)) {
goto compat_error;
}
src_len = src_slice->len;
src_items = (uint8_t*)src_slice->items + (src_slice->free * item_sz);
} else {
mp_not_implemented("array/bytes required on right side");
}
@ -404,9 +403,11 @@ STATIC mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value
// TODO: check src/dst compat
mp_int_t len_adj = src_len - (slice.stop - slice.start);
if (len_adj > 0) {
#if MICROPY_PY_BUILTINS_MEMORYVIEW
if (o->base.type == &mp_type_memoryview) {
goto compat_error;
}
#endif
if (len_adj > o->free) {
// TODO: alloc policy; at the moment we go conservative
o->items = m_renew(byte, o->items, (o->len + o->free) * item_sz, (o->len + len_adj) * item_sz);
@ -415,13 +416,16 @@ STATIC mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value
mp_seq_replace_slice_grow_inplace(o->items, o->len,
slice.start, slice.stop, src_items, src_len, len_adj, item_sz);
} else {
#if MICROPY_PY_BUILTINS_MEMORYVIEW
if (o->base.type == &mp_type_memoryview) {
if (len_adj != 0) {
goto compat_error;
}
mp_seq_replace_slice_no_grow((uint8_t*)o->items + (o->free * item_sz), o->len,
slice.start, slice.stop, src_items, src_len, item_sz);
} else {
} else
#endif
{
mp_seq_replace_slice_no_grow(o->items, o->len,
slice.start, slice.stop, src_items, src_len, item_sz);
// Clear "freed" elements at the end of list