Commit Graph

291 Commits

Author SHA1 Message Date
Damien George 016325dd0a py/vm: Make n_state variable local to just set-up part of VM.
It's not used anywhere else in the VM loop, and clashes with (is shadowed
by) the n_state variable that's redeclared towards the end of the
mp_execute_bytecode function.  Code size is unchanged.
2017-07-18 16:17:23 +10:00
Damien George 9ed5e80eea py/vm: Make "if" control flow more obvious in YIELD_FROM opcode. 2017-07-04 02:14:25 +10:00
Damien George a8a5d1e8c8 py: Provide mp_decode_uint_skip() to help reduce stack usage.
Taking the address of a local variable leads to increased stack usage, so
the mp_decode_uint_skip() function is added to reduce the need for taking
addresses.  The changes in this patch reduce stack usage of a Python call
by 8 bytes on ARM Thumb, by 16 bytes on non-windowing Xtensa archs, and by
16 bytes on x86-64.  Code size is also slightly reduced on most archs by
around 32 bytes.
2017-06-09 13:36:33 +10:00
Ville Skyttä ca16c38210 various: Spelling fixes 2017-05-29 11:36:05 +03:00
Damien George 04d05db27e py/vm: Fix bug with unwind jump popping the iterator from a for loop.
This patch fixes a regression introduced by
088740ecc4
2017-05-25 20:39:08 +10:00
Damien George 68e71eacb8 py/vm: Fix bug with stackless mode and unwinding of exceptions.
This patch fixes a regression introduced by
71a3d6ec3b

Previous to this patch the n_state variable was referring to that computed
at the very start of the mp_execute_bytecode function.  This patch fixes it
so that n_state is recomputed when the code_state changes.
2017-05-25 20:35:57 +10:00
Damien George dd11af209d py: Add LOAD_SUPER_METHOD bytecode to allow heap-free super meth calls.
This patch allows the following code to run without allocating on the heap:

    super().foo(...)

Before this patch such a call would allocate a super object on the heap and
then load the foo method and call it right away.  The super object is only
needed to perform the lookup of the method and not needed after that.  This
patch makes an optimisation to allocate the super object on the C stack and
discard it right after use.

Changes in code size due to this patch are:

   bare-arm: +128
    minimal: +232
   unix x64: +416
unix nanbox: +364
     stmhal: +184
    esp8266: +340
     cc3200: +128
2017-04-22 23:39:20 +10:00
Damien George a0973b09ce py/vm: Fix VM opcode tracing to print correct stack pointer.
Also const_table is now moved to the code_state->fun_bc structure.
2017-03-27 10:52:04 +11:00
Damien George 707f16b05c py: Use mp_locals/mp_globals accessor funcs instead of MP_STATE_CTX.
To improve maintainability of the code.
2017-03-24 18:41:11 +11:00
Damien George 60656eaea4 py: Define and use MP_OBJ_ITER_BUF_NSLOTS to get size of stack iter buf.
It improves readability of code and reduces the chance to make a mistake.

This patch also fixes a bug with nan-boxing builds by rounding up the
calculation of the new NSLOTS variable, giving the correct number of slots
(being 4) even if mp_obj_t is larger than the native machine size.
2017-03-23 16:36:08 +11:00
Damien George 1a5c8d1053 py/vm: Don't release the GIL if the scheduler is locked.
The scheduler being locked general means we are running a scheduled
function, and switching to another thread violates that, so don't switch in
such a case (even though we technically could).

And if we are running a scheduled function then we want to finish it ASAP,
so we shouldn't switch to another thread.

Furthermore, ports with threading enabled will lock the scheduler during a
hard IRQ, and this patch to the VM will make sure that threads are not
switched during a hard IRQ (which would crash the VM).
2017-03-20 18:42:27 +11:00
Damien George 6e74d24f30 py: Add micropython.schedule() function and associated runtime code. 2017-03-20 15:20:26 +11:00
Damien George 5640e6dacd py: Provide mp_decode_uint_value to help optimise stack usage.
This has a noticeable improvement on x86-64 and Thumb2 archs, where stack
usage is reduced by 2 machine words in the VM.
2017-03-17 16:50:19 +11:00
Damien George 71a3d6ec3b py: Reduce size of mp_code_state_t structure.
Instead of caching data that is constant (code_info, const_table and
n_state), store just a pointer to the underlying function object from which
this data can be derived.

This helps reduce stack usage for the case when the mp_code_state_t
structure is stored on the stack, as well as heap usage when it's stored
on the heap.

The downside is that the VM becomes a little more complex because it now
needs to derive the data from the underlying function object.  But this
doesn't impact the performance by much (if at all) because most of the
decoding of data is done outside the main opcode loop.  Measurements using
pystone show that little to no performance is lost.

This patch also fixes a nasty bug whereby the bytecode can be reclaimed by
the GC during execution.  With this patch there is always a pointer to the
function object held by the VM during execution, since it's stored in the
mp_code_state_t structure.
2017-03-17 16:39:13 +11:00
Damien George 088740ecc4 py: Optimise storage of iterator so it takes only 4 slots on Py stack. 2017-02-16 18:38:06 +11:00
Damien George 6e769da0da py: Make FOR_ITER opcode pop 1+4 slots from the stack when finished.
The extra 4 slots correspond to the iterator object stored on the stack.
2017-02-16 18:38:06 +11:00
Damien George f4df3aaa72 py: Allow bytecode/native to put iter_buf on stack for simple for loops.
So that the "for x in it: ..." statement can now work without using the
heap (so long as the iterator argument fits in an iter_buf structure).
2017-02-16 18:38:06 +11:00
Damien George ae8d867586 py: Add iter_buf to getiter type method.
Allows to iterate over the following without allocating on the heap:
- tuple
- list
- string, bytes
- bytearray, array
- dict (not dict.keys, dict.values, dict.items)
- set, frozenset

Allows to call the following without heap memory:
- all, any, min, max, sum

TODO: still need to allocate stack memory in bytecode for iter_buf.
2017-02-16 18:38:06 +11:00
Damien George 101886f529 py/vm: Convert mp_uint_t to size_t where appropriate. 2017-02-16 16:51:17 +11:00
Damien George f6c22a0679 py/vm: Add MICROPY_PY_THREAD_GIL_VM_DIVISOR option.
This improves efficiency of GIL release within the VM, by only doing the
release after a fixed number of jump-opcodes have executed in the current
thread.
2017-02-15 11:28:15 +11:00
Damien George cc4c1adf6e py/showbc: Make sure to set the const_table before printing bytecode. 2017-01-27 12:34:09 +11:00
Damien George 71fec076dc py/vm: Use MP_OBJ_FROM_PTR to cast a type to an object. 2016-09-27 13:21:23 +10:00
Damien George f040685b0c py: Only store the exception instance on Py stack in bytecode try block.
When an exception is raised and is to be handled by the VM, it is stored
on the Python value stack so the bytecode can access it.  CPython stores
3 objects on the stack for each exception: exc type, exc instance and
traceback.  uPy followed this approach, but it turns out not to be
necessary.  Instead, it is enough to store just the exception instance on
the Python value stack.  The only place where the 3 values are needed
explicitly is for the __exit__ handler of a with-statement context, but
for these cases the 3 values can be extracted from the single exception
instance.

This patch removes the need to store 3 values on the stack, and instead
just stores the exception instance.

Code size is reduced by about 50-100 bytes, the compiler and VM are
slightly simpler, generate bytecode is smaller (by 2 bytes for each try
block), and the Python value stack is reduced in size for functions that
handle exceptions.
2016-09-27 12:37:21 +10:00
Damien George adaf0d865c py: Combine 3 comprehension opcodes (list/dict/set) into 1.
With the previous patch combining 3 emit functions into 1, it now makes
sense to also combine the corresponding VM opcodes, which is what this
patch does.  This eliminates 2 opcodes which simplifies the VM and reduces
code size, in bytes: bare-arm:44, minimal:64, unix(NDEBUG,x86-64):272,
stmhal:92, esp8266:200.  Profiling (with a simple script that creates many
list/dict/set comprehensions) shows no measurable change in performance.
2016-09-19 12:28:03 +10:00
Damien George 581a59a456 py: Rename struct mp_code_state to mp_code_state_t.
Also at _t to mp_exc_stack pre-declaration in struct typedef.
2016-08-27 23:21:00 +10:00
Damien George 4cec63a9db py: Implement a simple global interpreter lock.
This makes the VM/runtime thread safe, at the cost of not being able to
run code in parallel.
2016-06-28 11:28:50 +01:00
Paul Sokolovsky eff85bb1dc py/vm: "yield from" didn't handle MP_OBJ_STOP_ITERATION optimization.
E.g. crashed when yielding from already stopped generators.
2016-04-28 02:08:43 +03:00
Damien George 40d8430ee3 py/vm: Add macros to hook into various points in the VM.
These can be used to insert arbitrary checks, polling, etc into the VM.
They are left general because the VM is a highly tuned loop and it should
be up to a given port how that port wants to modify the VM internals.

One common use would be to insert a polling check, but only done after
a certain number of opcodes were executed, so as not to slow down the VM
too much.  For example:

 #define MICROPY_VM_HOOK_COUNT (30)
 #define MICROPY_VM_HOOK_INIT static uint vm_hook_divisor = MICROPY_VM_HOOK_COUNT
 #define MICROPY_VM_HOOK_POLL if (--vm_hook_divisor == 0) { \
     vm_hook_divisor = MICROPY_VM_HOOK_COUNT;
     extern void vm_hook_function(void);
     vm_hook_function();
 }
 #define MICROPY_VM_HOOK_LOOP MICROPY_VM_HOOK_POLL
 #define MICROPY_VM_HOOK_RETURN MICROPY_VM_HOOK_POLL
2016-02-17 09:02:19 +00:00
Damien George 93bb7dffd2 py/vm: Fix popping of exception block in UNWIND_JUMP opcode.
Fixes issue #1812.
2016-02-01 16:07:21 +00:00
Damien George 3d2daa2d03 py: Change exception traceback data to use size_t instead of mp_uint_t.
The traceback array stores qstrs and line numbers.  qstrs are typed as
size_t, and line numbers should safely fit in size_t as well.
2016-01-02 22:04:12 +00:00
Damien George 8047340d75 py: Handle case of return within the finally block of try-finally.
Addresses issue #1636.
2015-12-24 12:47:39 +00:00
Damien George 7a30e87d2b py: Fix MICROPY_STACKLESS mode to compile with MICROPY_OBJ_REPR_D. 2015-12-17 12:32:41 +00:00
Damien George bdbe8c9ae2 py: Make UNARY_OP_NOT a first-class op, to agree with Py not semantics.
Fixes #1684 and makes "not" match Python semantics.  The code is also
simplified (the separate MP_BC_NOT opcode is removed) and the patch saves
68 bytes for bare-arm/ and 52 bytes for minimal/.

Previously "not x" was implemented as !mp_unary_op(x, MP_UNARY_OP_BOOL),
so any given object only needs to implement MP_UNARY_OP_BOOL (and the VM
had a special opcode to do the ! bit).

With this patch "not x" is implemented as mp_unary_op(x, MP_UNARY_OP_NOT),
but this operation is caught at the start of mp_unary_op and dispatched as
!mp_obj_is_true(x).  mp_obj_is_true has special logic to test for
truthness, and is the correct way to handle the not operation.
2015-12-10 22:19:48 +00:00
Damien George 999cedb90f py: Wrap all obj-ptr conversions in MP_OBJ_TO_PTR/MP_OBJ_FROM_PTR.
This allows the mp_obj_t type to be configured to something other than a
pointer-sized primitive type.

This patch also includes additional changes to allow the code to compile
when sizeof(mp_uint_t) != sizeof(void*), such as using size_t instead of
mp_uint_t, and various casts.
2015-11-29 14:25:35 +00:00
Damien George c8e9c0d89a py: Add MICROPY_PERSISTENT_CODE so code can persist beyond the runtime.
Main changes when MICROPY_PERSISTENT_CODE is enabled are:

- qstrs are encoded as 2-byte fixed width in the bytecode
- all pointers are removed from bytecode and put in const_table (this
  includes const objects and raw code pointers)

Ultimately this option will enable persistence for not just bytecode but
also native code.
2015-11-13 12:49:18 +00:00
Damien George 4bf3f2d3c0 py: Fix with+for+return bug by popping for-iter when unwinding exc stack.
Addresses issue #1182.
2015-10-15 17:48:28 +01:00
Paul Sokolovsky 2ff2ea5f3b vm: Handle "raise X from Y" statements the best way we can.
By issuing a warning that exception chaining is not supported, and ignoring
"from Y" argument.
2015-09-01 10:39:04 +03:00
Damien George 59fba2d6ea py: Remove mp_load_const_bytes and instead load precreated bytes object.
Previous to this patch each time a bytes object was referenced a new
instance (with the same data) was created.  With this patch a single
bytes object is created in the compiler and is loaded directly at execute
time as a true constant (similar to loading bignum and float objects).
This saves on allocating RAM and means that bytes objects can now be
used when the memory manager is locked (eg in interrupts).

The MP_BC_LOAD_CONST_BYTES bytecode was removed as part of this.

Generated bytecode is slightly larger due to storing a pointer to the
bytes object instead of the qstr identifier.

Code size is reduced by about 60 bytes on Thumb2 architectures.
2015-06-25 14:42:13 +00:00
Damien George ed570e4b2a py: Remove mp_load_const_str and replace uses with inlined version. 2015-06-25 13:58:41 +00:00
Damien George c5029bcbf3 py: Add MP_BINARY_OP_DIVMOD to simplify and consolidate divmod builtin. 2015-06-13 23:36:30 +01:00
Damien George c2a4e4effc py: Convert hash API to use MP_UNARY_OP_HASH instead of ad-hoc function.
Hashing is now done using mp_unary_op function with MP_UNARY_OP_HASH as
the operator argument.  Hashing for int, str and bytes still go via
fast-path in mp_unary_op since they are the most common objects which
need to be hashed.

This lead to quite a bit of code cleanup, and should be more efficient
if anything.  It saves 176 bytes code space on Thumb2, and 360 bytes on
x86.

The only loss is that the error message "unhashable type" is now the
more generic "unsupported type for __hash__".
2015-05-12 22:46:02 +01:00
Paul Sokolovsky 6738c1dded vm: Properly handle StopIteration raised in user instance iterator.
I.e. in bytecode Python functions.
2015-05-11 23:57:42 +01:00
Paul Sokolovsky a7c02c4538 vm: Null pointer test when checking for StopIteration optimizations.
When generator raises exception, it is automatically terminated (by setting
its code_state.ip to 0), which interferes with this check.

Triggered in particular by CPython's test_pep380.py.
2015-05-10 17:20:46 +03:00
Damien George 8872abcbc4 py: Remove LOAD_CONST_ELLIPSIS bytecode, use LOAD_CONST_OBJ instead.
Ellipsis constant is rarely used so no point having an extra bytecode
for it.
2015-05-05 22:15:42 +01:00
Paul Sokolovsky ae2c81ff38 vm: On exiting except block, clear sys.exc_info() value.
This doesn't handle case fo enclosed except blocks, but once again,
sys.exc_info() support is a workaround for software which uses it
instead of properly catching exceptions via variable in except clause.
2015-04-26 01:40:37 +03:00
Paul Sokolovsky 8b85d14b92 modsys: Add basic sys.exc_info() implementation.
The implementation is very basic and non-compliant and provided solely for
CPython compatibility. The function itself is bad Python2 heritage, its
usage is discouraged.
2015-04-25 03:49:23 +03:00
Damien George 8c1d23a0e2 py: Modify bytecode "with" behaviour so it doesn't use any heap.
Before this patch a "with" block needed to create a bound method object
on the heap for the __exit__ call.  Now it doesn't because we use
load_method instead of load_attr, and save the method+self on the stack.
2015-04-24 01:52:28 +01:00
Damien George b1bbe966c4 py: Combine load_attr and store_attr type methods into one (attr).
This simplifies the API for objects and reduces code size (by around 400
bytes on Thumb2, and around 2k on x86).  Performance impact was measured
with Pystone score, but change was barely noticeable.
2015-04-11 16:54:37 +01:00
Damien George 4dea922610 py: Adjust some spaces in code style/format, purely for consistency. 2015-04-09 15:29:54 +00:00
stijn 36cc84a2a9 py: Fix msvc warning '*/ found outside of comment'
Also prevents some of the weaker syntax parsers out there treating the whole
'*/*const*/' part as a comment
2015-04-09 12:40:38 +02:00
Damien George 12a5e17afb py: Add finer configuration of static funcs when not in stackless mode.
Also rename call_args_t to mp_call_args_t.
2015-04-02 22:56:58 +01:00
Paul Sokolovsky 7f1c98177b vm: Support strict stackless mode, with proper exception reporting.
I.e. in this mode, C stack will never be used to call a Python function,
but if there's no free heap for a call, it will be reported as
RuntimeError (as expected), not MemoryError.
2015-04-03 00:26:47 +03:00
Paul Sokolovsky f0a8f21190 vm: Implement stackless for CALL_FUNCTION_VAR_KW & CALL_METHOD_VAR_KW. 2015-04-03 00:03:07 +03:00
Paul Sokolovsky 390e92688c vm: Stackless support for MP_BC_CALL_METHOD. 2015-04-03 00:03:07 +03:00
Paul Sokolovsky 332a909d44 vm: If there's no heap to call function in stackless manner, call via C stack. 2015-04-03 00:03:07 +03:00
Paul Sokolovsky 2039757b85 vm: Initial support for calling bytecode functions w/o C stack ("stackless"). 2015-04-03 00:03:07 +03:00
stijn 28fa84b445 py: Add optional support for descriptors' __get__ and __set__ methods.
Disabled by default.  Enabled on unix and windows ports.
2015-03-26 23:55:14 +00:00
Damien George 5e1d993f54 py: Clean up some logic in VM to remove assert(0)'s.
Saves around 30 bytes code on Thumb2 archs.
2015-03-25 22:20:37 +00:00
Damien George 12d6d777e1 py: Small optimisation of logic flow in BC_WITH_CLEANUP bytecode.
Slightly smaller code, and does not need to use C stack to save
temporaries.
2015-02-26 17:54:50 +00:00
Damien George 596f41da04 py: Reuse value stack in VM WITH_CLEANUP opcode to reduce C-stack size.
Saves 8 bytes C-stack on stmhal and 16 bytes on unix x86.
2015-02-10 13:21:42 +00:00
Damien George 7d414a1b52 py: Parse big-int/float/imag constants directly in parser.
Previous to this patch, a big-int, float or imag constant was interned
(made into a qstr) and then parsed at runtime to create an object each
time it was needed.  This is wasteful in RAM and not efficient.  Now,
these constants are parsed straight away in the parser and turned into
objects.  This allows constants with large numbers of digits (so
addresses issue #1103) and takes us a step closer to #722.
2015-02-08 01:57:40 +00:00
Damien George dab1385177 py: Add load_const_obj to emitter, add LOAD_CONST_OBJ to bytecode.
This allows to directly load a Python object to the Python stack.  See
issue #722 for background.
2015-01-13 15:55:54 +00:00
Damien George 7ee91cf861 py: Add option to cache map lookup results in bytecode.
This is a simple optimisation inspired by JITing technology: we cache in
the bytecode (using 1 byte) the offset of the last successful lookup in
a map. This allows us next time round to check in that location in the
hash table (mp_map_t) for the desired entry, and if it's there use that
entry straight away.  Otherwise fallback to a normal map lookup.

Works for LOAD_NAME, LOAD_GLOBAL, LOAD_ATTR and STORE_ATTR opcodes.

On a few tests it gives >90% cache hit and greatly improves speed of
code.

Disabled by default.  Enabled for unix and stmhal ports.
2015-01-07 21:07:23 +00:00
Damien George b4b10fd350 py: Put all global state together in state structures.
This patch consolidates all global variables in py/ core into one place,
in a global structure.  Root pointers are all located together to make
GC tracing easier and more efficient.
2015-01-07 20:33:00 +00:00
Damien George 51dfcb4bb7 py: Move to guarded includes, everywhere in py/ core.
Addresses issue #1022.
2015-01-01 20:32:09 +00:00
Damien George f89d659e3b py: In VM, for selective ip saving, store 1 byte past last opcode.
This is for efficiency, so we don't need to subtract 1 from the ip
before storing it to code_state->ip.  It saves a lot of ROM bytes on
unix and stmhal.
2014-12-29 00:29:59 +00:00
Paul Sokolovsky 749575097f vm: Record exception ip only for instructions where exceptions may happen.
Mirroring ip to a volatile memory variable for each opcode is an expensive
operation. For quite a lot of often executed opcodes like stack manipulation
or jumps, exceptions cannot actually happen. So, record ip only for opcode
where that's possible.
2014-12-28 07:37:04 +02:00
Damien George 74eb44c392 py: Reduce size of VM exception stack element by 1 machine word.
This optimisation reduces the VM exception stack element (mp_exc_stack_t)
by 1 word, by using bit 1 of a pointer to store whether the opcode was a
FINALLY or WITH opcode.  This optimisation was pending, waiting for
maturity of the exception handling code, which has now proven itself.

Saves 1 machine word RAM for each exception (4->3 words per exception).
Increases stmhal code by 4 bytes, and decreases unix x64 code by 32
bytes.
2014-12-22 12:49:57 +00:00
Damien George 7764f163fa py: Fix label printing in showbc; print sp in vm trace. 2014-12-12 17:18:56 +00:00
Damien George cd97a43f8d py, vm: Make unum a local variable for each opcode that uses it.
This makes no change to the generated code, but it's now easier to
understand since unum is not a "global" variable anymore.
2014-12-02 19:25:10 +00:00
Damien George b0b0012fd8 py: Fix VM dispatch following a pending exception check. 2014-10-26 00:33:23 +01:00
Damien George 124df6f8d0 py: Add mp_pending_exception global variable, for VM soft interrupt.
This allows to implement KeyboardInterrupt on unix, and a much safer
ctrl-C in stmhal port.  First ctrl-C is a soft one, with hope that VM
will notice it; second ctrl-C is a hard one that kills anything (for
both unix and stmhal).

One needs to check for a pending exception in the VM only for jump
opcodes.  Others can't produce an infinite loop (infinite recursion is
caught by stack check).
2014-10-25 23:37:57 +01:00
Damien George 8456cc017b py: Compress load-int, load-fast, store-fast, unop, binop bytecodes.
There is a lot potential in compress bytecodes and make more use of the
coding space.  This patch introduces "multi" bytecodes which have their
argument included in the bytecode (by addition).

UNARY_OP and BINARY_OP now no longer take a 1 byte argument for the
opcode.  Rather, the opcode is included in the first byte itself.

LOAD_FAST_[0,1,2] and STORE_FAST_[0,1,2] are removed in favour of their
multi versions, which can take an argument between 0 and 15 inclusive.
The majority of LOAD_FAST/STORE_FAST codes fit in this range and so this
saves a byte for each of these.

LOAD_CONST_SMALL_INT_MULTI is used to load small ints between -16 and 47
inclusive.  Such ints are quite common and now only need 1 byte to
store, and now have much faster decoding.

In all this patch saves about 2% RAM for typically bytecode (1.8% on
64-bit test, 2.5% on pyboard test).  It also reduces the binary size
(because bytecodes are simplified) and doesn't harm performance.
2014-10-25 20:23:13 +01:00
Damien George b534e1b9f1 py: Use variable length encoded uints in more places in bytecode.
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.
2014-09-04 14:44:01 +01:00
Damien George b427d6ae86 py: Fix line number printing for file with 1 line.
With a file with 1 line (and an error on that line), used to show the
line as number 0.  Now shows it correctly as line number 1.

But, when line numbers are disabled, it now prints line number 1 for any
line that has an error (instead of 0 as previously).  This might end up
being confusing, but requires extra RAM and/or hack logic to make it
print something special in the case of no line numbers.
2014-08-26 23:35:57 +01:00
Damien George 4747becc64 py: Improve encoding scheme for line-number to bytecode map.
Reduces by about a factor of 10 on average the amount of RAM needed to
store the line-number to bytecode map in the bytecode prelude.

Using CPython3.4's stdlib for statistics: previously, an average of
13 bytes were used per (bytecode offset, line-number offset) pair, and
now with this improvement, that's down to 1.3 bytes on average.

Large RAM usage before was due to some very large steps in line numbers,
both from the start of the first line in a function way down in the
file, and also functions that have big comments and/or big strings in
them (both cases were significant).

Although the savings are large on average for the CPython stdlib, it
won't have such a big effect for small scripts used in embedded
programming.

Addresses issue #648.
2014-07-31 16:12:01 +00:00
Damien George 40f3c02682 Rename machine_(u)int_t to mp_(u)int_t.
See discussion in issue #50.
2014-07-03 13:25:24 +01:00
Damien George df896eceef Merge branch 'alloca' of github.com:marcusva/micropython into marcusva-alloca 2014-06-08 13:18:14 +01:00
Damien George aabd83ea20 py: Merge mp_execute_bytecode into fun_bc_call.
This reduces stack usage by 16 words (64 bytes) for stmhal/ port.

See issue #640.
2014-06-07 14:16:08 +01:00
Marcus von Appen 0c90eb1658 - FreeBSD provides alloca() via stdlib.h, in contrast to Linux and Windows
- Move the includes for alloca() intp mpconfigport.h
2014-06-07 09:36:04 +02:00
Paul Sokolovsky 411732e93b vm: If there's no lineno info, set lineno in traceback to 0, not 1.
To clearly signify that lineno is not known.
2014-06-03 12:32:59 +03:00
Damien George 3ebd4d0cae py: Add option to disable set() object (enabled by default). 2014-06-01 13:46:47 +01:00
Damien George fb510b3bf9 Rename bultins config variables to MICROPY_PY_BUILTINS_*.
This renames:
MICROPY_PY_FROZENSET -> MICROPY_PY_BUILTINS_FROZENSET
MICROPY_PY_PROPERTY -> MICROPY_PY_BUILTINS_PROPERTY
MICROPY_PY_SLICE -> MICROPY_PY_BUILTINS_SLICE
MICROPY_ENABLE_FLOAT -> MICROPY_PY_BUILTINS_FLOAT

See issue #35 for discussion.
2014-06-01 13:32:54 +01:00
Damien George c60a261ef0 py, vm: Replace save_ip, save_sp with code_state->{ip, sp}.
This may seem a bit of a risky change, in that it may introduce crazy
bugs with respect to volatile variables in the VM loop.  But, I think it
should be fine: code_state points to some external memory, so the
compiler should always read/write to that memory when accessing the
ip/sp variables (ie not put them in registers).

Anyway, it passes all tests and improves on all efficiency fronts: about
2-4% faster (64-bit unix), 16 bytes less stack space per call (64-bit
unix) and slightly less executable size (unix and stmhal).

The reason it's more efficient is save_ip and save_sp were volatile
variables, so were anyway stored on the stack (in memory, not regs).
Thus converting them to code_state->{ip, sp} doesn't cost an extra
memory dereference (except maybe to get code_state, but that can be put
in a register and then made more efficient for other uses of it).
2014-06-01 12:32:28 +01:00
Damien George 1b87d1098a Merge branch 'vm-alloca' of github.com:pfalcon/micropython into pfalcon-vm-alloca
Conflicts:
	py/vm.c

Fixed stack underflow check.  Use UINT_FMT/INT_FMT where necessary.
Specify maximum VM-stack byte size by multiple of machine word size, so
that on 64 bit machines it has same functionality as 32 bit.
2014-06-01 12:06:17 +01:00
Damien George 5b5562c1d1 py: Fix stack underflow with optimised for loop. 2014-05-31 17:59:11 +01:00
Paul Sokolovsky b4ebad3310 vm: Factor out structure with code execution state and pass it around.
This improves stack usage in callers to mp_execute_bytecode2, and is step
forward towards unifying execution interface for function and generators
(which is important because generators don't even support full forms
of arguments passing (keywords, etc.)).
2014-05-31 18:22:01 +03:00
Paul Sokolovsky b16523aa95 vm: Don't unconditionally allocate state on stack, do that only if needed.
This makes sure that only as much stack allocated as actually used, reducing
stack usage for each Python function call.
2014-05-31 18:19:33 +03:00
Paul Sokolovsky ff8da0b835 vm: Detect stack underflow in addition to overflow. 2014-05-31 18:14:54 +03:00
Paul Sokolovsky 1f07b7e3c3 py: Reformat few long functions argument lists for clarity. 2014-05-31 03:36:37 +03:00
Damien George 25c84643b6 py: Fix break from within a for loop.
Needed to pop the iterator object when breaking out of a for loop.  Need
also to be careful to unwind exception handler before popping iterator.

Addresses issue #635.
2014-05-30 15:20:41 +01:00
Damien George 503d611033 py: Implement long int parsing in int(...).
Addresses issue #627.
2014-05-28 14:07:21 +01:00
Damien George d8675541a9 py, vm: Where possible, make variables local to each opcode.
This helps the compiler do its optimisation, makes it clear which
variables are local per opcode and which global, and makes it consistent
when extra variables are needed in an opcode (in addition to old obj1,
obj2 pair, for example).

Could also make unum local, but that's for another time.
2014-05-25 22:58:04 +01:00
Paul Sokolovsky afaaf535e6 objslice: Support arbitrary objects start, stop, and step.
Older int-only encoding is not expressive enough to support arbitrary slice
assignment operations.
2014-05-25 01:42:24 +03:00
Damien George ee3fd46f13 Rename configuration variables controling Python features.
Now of the form MICROPY_PY_*.  See issue #35.
2014-05-24 23:03:12 +01:00
Damien George 58ebde4664 Tidy up some configuration options.
MP_ALLOC_* -> MICROPY_ALLOC_*
MICROPY_PATH_MAX -> MICROPY_ALLOC_PATH_MAX
MICROPY_ENABLE_REPL_HELPERS -> MICROPY_HELPER_REPL
MICROPY_ENABLE_LEXER_UNIX -> MICROPY_HELPER_LEXER_UNIX
MICROPY_EXTRA_* -> MICROPY_PORT_*

See issue #35.
2014-05-21 20:32:59 +01:00
Paul Sokolovsky da9f0924ef py, unix: Add copyright for modules I worked closely on. 2014-05-13 18:41:25 +03:00
Paul Sokolovsky c48d6f7add py: Don't expect that type->getiter() always returns iterator, check for NULL.
This is better than forcing each getiter() implementation to raise exception.
2014-05-11 20:51:31 +03:00
Damien George 3417bc2f25 py: Rename byte_code to bytecode everywhere.
bytecode is the more widely used.  See issue #590.
2014-05-10 10:36:38 +01:00
Damien George a32c1e41cc py: Improve native emitter; now supports more opcodes. 2014-05-07 18:30:52 +01:00