libfixmath

Commit Graph

Author	SHA1	Message	Date
flatmush	5dd63f37ce	Updated sin lut to use ~200KiB for it's table with the same accuracy, the lookup table implementation tends to run at about 33-36% of the speed of sinf on my machine (Intel T5500). Fixed a bug in the sin lut code so that the results are always accurate. Changed fixsingen tool to generate tables correctly for the new implementation.	2011-02-25 16:07:39 +00:00
flatmush	0317f964f4	Added option to replace sin function with ~384KiB look-up table for fastest and most accurate results. Added tool to generate sin tables. Tests indicate that using a lut is still ~2.1% out from sinf so it's very possible that our sin function is more accurate than the libmath sinf function on the computer I'm testing with. In which case the accuracy results are offset by that amount.	2011-02-25 15:32:23 +00:00
flatmush	0ecfa08dc3	Added a new faster version of the sin function, it loses 0.2% accuracy for a speed gain of 159%. The accuracy of the standard implementation is ~2.1% while this is ~2.3%. This can be enabled using the FIXMATH_FAST_SIN macro.	2011-02-25 13:37:37 +00:00
flatmush	8cbe9b3f9b	Added fix16_exp currently using the Taylor Series algorithm off Wikipedia, if anyone can optimize this better then go ahead. Modified fixtest to be a little more generic, can now easily change which function it tests.	2011-02-25 12:08:03 +00:00
flatmush	d829f83d31	Updated fix16_atan, now removes some un-necessary code. Added FIXMATH_NO_ROUNDING macro to disable rounding, currently only applies to fix16_atan but will change to apply this to other operations (namely mul/div) too. Changed optimization options for rel build in code::blocks project.	2011-02-24 17:18:08 +00:00
flatmush	f5cb74ab2e	Added an optimized and improved implementation of joe's fixed point atan2 algorithm so that it now works correctly over the full range of fixed point numbers and should be much faster too.	2011-02-23 17:07:17 +00:00
flatmush	5d939700e8	Fixed errors in asin/atan, where incorrect integer maths was used. Added a macro (FIXMATH_NO_CACHE) to disable caching. Added fix16_lerp8 and fix16_lerp32 (should be part of fract module really).	2011-02-23 09:47:08 +00:00
Flatmush	3420855dc0	Initial commit. Since its use in fgl and the Dingoo SDK the functions have been separated into more descriptive files/modules.	2011-02-14 20:59:41 +00:00

8 Commits