The Go tools only consider lowercase .s files to be assembly files. By
renaming these to uppercase .S files they won't be discovered by the Go
toolchain and listed as the SFiles to be assembled.
There is a difference between .s and .S: only uppercase .S will be
passed through the preprocessor. Doing that is normally safe, and
definitely safe in the case of these files.
Go 1.19 started reformatting code in a way that makes it more obvious
how it will be rendered on pkg.go.dev. It gets it almost right, but not
entirely. Therefore, I had to modify some of the comments so that they
are formatted correctly.
This should add support for things like quotes around tags, if they are
ever needed.
Only making this change now because I happened to stumble across
buildutil.TagsFlag.
For some reason, these aren't lowered when a generic function is
instantiated by the SSA package.
I've left unsafe.Offsetof to be implemented later, it's a bit difficult
to do correctly the way the code is currently structured.
Without this change, the compiler would probably have worked just fine
but the generated types would look odd.
You can see in the test case that it now doesn't use `main.Point` but
rather the correct `main.Poin[float32]` etc.
For write-only operations (in SPI displays for example), the transmit
speed is doubled with this relatively small change.
In the future, we should try to use DMA instead for larger buffers. But
this is already a significant improvement and will always be an
improvement for small buffer sizes.
These are reserved registers on MacOS so don't need to be clobbered, and
result in a compiler waring:
ld.lld-14: warning: inline asm clobber list contains reserved registers: X18, FP
Reserved registers on the clobber list may not be preserved across the asm statement, and clobbering them may lead to undefined behaviour.
This makes nrf51 consistent with nrf52 and other chips, which do provide
constants for hardware pin numbers.
I've also added the microbit to the smoketest because it is used on
play.tinygo.org. And removed PCA10040 and PCA10056 because they aren't
provided on play.tinygo.org anymore.
