557d31ed2c
Before this change, long/mpz ints propagated into all future calculations, even if their value could fit in a small-int object. With this change, the result of a big-int binary op will now be converted to a small-int object if the value fits in a small-int. For example, a relatively common operation like `x = a * b // c` where a,b,c all small ints would always result in a long/mpz int, even if it didn't need to, and then this would impact all future calculations with x. This adds +24 bytes on PYBV11 but avoids heap allocations and potential surprises (e.g. `big-big` is now a small `0`, and can safely be accessed with MP_OBJ_SMALL_INT_VALUE). Performance tests are unchanged on PYBV10, except for `bm_pidigits.py` which makes heavy use of big-ints and gains about 8% in speed. Unix coverage tests have been updated to cover mpz code that is now unreachable by normal Python code (removing the unreachable code would lead to some surprising gaps in the internal C functions and the functionality may be needed in the future, so it is kept because it has minimal overhead). This work was funded through GitHub Sponsors. Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
The Unix version
The "unix" port requires a standard Unix-like environment with gcc and GNU make. This includes Linux, BSD, macOS, and Windows Subsystem for Linux. The x86 and x64 architectures are supported (i.e. x86 32- and 64-bit), as well as ARM and MIPS. Making a full-featured port to another architecture requires writing some assembly code for the exception handling and garbage collection. Alternatively, a fallback implementation based on setjmp/longjmp can be used.
To build (see section below for required dependencies):
$ cd ports/unix
$ make submodules
$ make
Then to give it a try:
$ ./build-standard/micropython
>>> list(5 * x + y for x in range(10) for y in [4, 2, 1])
Use CTRL-D (i.e. EOF) to exit the shell.
Learn about command-line options (in particular, how to increase heap size which may be needed for larger applications):
$ ./build-standard/micropython -h
To run the complete testsuite, use:
$ make test
The Unix port comes with a built-in package manager called mip, e.g.:
$ ./build-standard/micropython -m mip install hmac
or
$ ./build-standard/micropython
>>> import mip
>>> mip.install("hmac")
Browse available modules at
micropython-lib. See
Package management
for more information about mip.
External dependencies
The libffi library and pkg-config tool are required. On Debian/Ubuntu/Mint
derivative Linux distros, install build-essential(includes toolchain and
make), libffi-dev, and pkg-config packages.
Other dependencies can be built together with MicroPython. This may be required to enable extra features or capabilities, and in recent versions of MicroPython, these may be enabled by default. To build these additional dependencies, in the unix port directory first execute:
$ make submodules
This will fetch all the relevant git submodules (sub repositories) that the port needs. Use the same command to get the latest versions of submodules as they are updated from time to time. After that execute:
$ make deplibs
This will build all available dependencies (regardless whether they are used
or not). If you intend to build MicroPython with additional options
(like cross-compiling), the same set of options should be passed to make deplibs. To actually enable/disable use of dependencies, edit the
ports/unix/mpconfigport.mk file, which has inline descriptions of the
options. For example, to build the SSL module, MICROPY_PY_SSL should be
set to 1.
Debug Symbols
By default, builds are stripped of symbols and debug information to save size.
To build a debuggable version of the Unix port, there are two options
- Run
make [other arguments] DEBUG=1. Note settingDEBUGalso reduces the optimisation level, so it's not a good option for builds that also want the best performance. - Run
make [other arguments] STRIP=. Note that the value ofSTRIPis empty. This will skip the build step that strips symbols and debug information, but changes nothing else in the build configuration.