suspect-devices/circuitpython/lib/libm/ef_rem_pio2.c, branch 6.0.xCircuitPython - a Python implementation for teaching coding with microcontrollershttps://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=6.0.x2020-08-04T19:45:45+00:00libm: rem_pio2: Reduce size of static array2020-08-04T19:45:45+00:00Jeff Eplerjepler@gmail.com2020-08-04T18:12:44+00:00urn:sha1:c0b32976e8bff4a04cd4f172535e3b153143b417
This array was of 32-bit values, but the entries were only ever
in the 0-255 range. Convert to uint8_t.
Testing performed: The result of the sum-of-sin was unchanged
>>> import math; sum(math.sin(2.**i) for i in range(21))
1.42069
libm: ef_rem_pio2.c: Save ROM-tables at the expense of speed2020-08-04T19:45:45+00:00Jeff Eplerjepler@gmail.com2020-08-04T18:06:46+00:00urn:sha1:d3fb6c96da9dc38ea24a221e11f05cdbbddb34c9
This function computes the remainder of a value `x` modulo pi/2, to high
precision.
It does this by dividing the flotaing point values into several ranges
by magnitude, and applies successively slower but more accurate algorithms.
The last two steps, one covering values up to around 2^7 * pi/2
(called "medium size") and a final one covering all possible float values,
require big tables.
By eliminating the "medium size" case, a table and some code are removed
from the binary. This makes some cases take longer, but saves hundreds
of bytes. It does _NOT_ affect the result, only the speed.
```
[desktop python]
>>> sum(math.sin(2.**i) for i in range(21))
1.4206898748939305
[trinket m0, before change to ef_rem_pio2.c]
>>> sum(math.sin(2.**i) for i in range(21))
1.42069
[trinket m0, after change to ef_rem_pio2.c]
>>> sum(math.sin(2.**i) for i in range(21))
1.42069
```
Fix up end of file and trailing whitespace.2020-06-03T09:56:35+00:00Diego Elio Pettenòflameeyes@flameeyes.com2020-05-30T09:44:13+00:00urn:sha1:dd5d7c86d22807c021dd1711eb7dd3daebc5cfcf
This can be enforced by pre-commit, but correct it separately to make it easier to review.
Merge 2.1.0 changes into master.2017-10-23T22:26:36+00:00Dan Halberthalbert@halwitz.org2017-10-23T16:29:17+00:00urn:sha1:6df99b5d0e0f406b6b3e8bd220d1129225b9c2aeall: Use the name MicroPython consistently in comments2017-07-31T08:35:40+00:00Alexander Steffendevel.20.webmeister@spamgourmet.com2017-06-30T07:22:17+00:00urn:sha1:55f33240f3d7051d4213629e92437a36f1fac50e
There were several different spellings of MicroPython present in comments,
when there should be only one.
lib/libm: Add acosh, asinh, atanh, tan; get working with stmhal.2014-12-18T14:44:02+00:00Damien Georgedamien.p.george@gmail.com2014-12-18T14:44:02+00:00urn:sha1:f04329e93b7bfa5462f232832d64aac3dc52d5db
acoshf, asinhf, atanhf were added from musl. mathsincos.c was
split up into its original, separate files (from newlibe-nano-2).
tan was added.
All of the important missing float functions are now implemented,
and pyboard now passes tests/float/math_fun.py (finally!).