Jeff Wang
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45e4dd25f8
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fix e^x calculation for negative x
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2019-10-06 21:38:32 -04:00 |
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Jeff Wang
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5345843974
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update refout
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2019-10-06 21:06:48 -04:00 |
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Jeff Wang
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5f0cec0bad
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bugfix for log()/pow: minimize stack usage
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2019-10-06 21:04:45 -04:00 |
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Jeff Wang
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75dd499630
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add power function, try to reduce stack usage, standardize unary ops
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2019-10-06 21:04:45 -04:00 |
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Jeff Wang
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bf0bfe39a4
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calculate relative diff instead of absolute diff
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2019-10-06 21:04:45 -04:00 |
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Jeff Wang
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1a9bbcc1ce
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initial exp() implementation
(refout for log(1.5) changed due to using more accurate expected result)
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2019-10-06 21:04:40 -04:00 |
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Jeff Wang
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277ae0acf3
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speedup log calculation by optimizing mulitplication by 1 + 10^-j
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2019-10-05 01:04:57 -04:00 |
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Jeff Wang
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06ca0b2829
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speedup log calculation by optimizing subtracting 10, regenerate reference output
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2019-10-05 01:04:38 -04:00 |
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Jeff Wang
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ce42e30513
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log10() fixes to prevent calculator from crashing
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2019-10-04 23:49:42 -04:00 |
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Jeff Wang
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c2edc7871d
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fix top line display after clearing after arith operation (anything which disables stack lift)
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2019-10-03 01:11:42 -04:00 |
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Jeff Wang
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c42cdedc1b
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fix enter for DUP showing X as 0, unify processing of commands
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2019-10-03 00:58:54 -04:00 |
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Jeff Wang
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75de345f7c
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merge fix
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2019-10-03 00:33:45 -04:00 |
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Jeff Wang
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181469dd57
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set error when trying to calculate log(0)
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2019-10-03 00:32:38 -04:00 |
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Jeff Wang
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c3ec112f97
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bugfix for shift-clear
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2019-10-03 00:32:35 -04:00 |
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Jeff Wang
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21be4081b2
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add log10() function
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2019-10-03 00:31:25 -04:00 |
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Jeff Wang
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0f17fbdcc7
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fix digit entry before taking log
separate out finishing entry/processing command into common function
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2019-10-03 00:31:20 -04:00 |
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Jeff Wang
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5c194c68e4
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build fix
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2019-10-02 23:27:58 -04:00 |
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Jeff Wang
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77d18b57c5
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make sure number not negative before trying to take log
also remove some TODOs
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2019-10-02 22:51:02 -04:00 |
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Jeff Wang
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cb92a82f4b
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add shift key and ability to calculate ln()
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2019-10-02 22:47:53 -04:00 |
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Jeff Wang
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9fc462ca94
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bugfix for backspacing from exp entry all the back to significand entry
check for '.' needs to be after entry_i--
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2019-10-02 22:47:32 -04:00 |
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Jeff Wang
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5a3dc2337d
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more checks for NaN/errors before performing operations
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2019-10-02 22:46:26 -04:00 |
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Jeff Wang
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23e49a0405
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NUM_A_ARRAY cannot be less than num_lsu
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2019-10-02 22:45:02 -04:00 |
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Jeff Wang
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ac1aaac096
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initial natural log implementation
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2019-10-02 22:43:23 -04:00 |
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Jeff Wang
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acc9c4821f
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prototyping of reciprocal and log functions
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2019-10-02 02:52:08 -04:00 |
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Jeff Wang
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6eb48de844
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more comments
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2019-09-24 00:11:51 -04:00 |
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Jeff Wang
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4f020da222
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use global registers for division, have sub_mag() operate directly on Accum and B
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2019-09-23 23:46:58 -04:00 |
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Jeff Wang
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747355222d
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try to remove more trailing 0s
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2019-09-23 23:06:43 -04:00 |
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Jeff Wang
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9dcb16681e
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fix desktop build warnings
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2019-09-23 22:57:34 -04:00 |
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Jeff Wang
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eccd89807a
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improve initial estimate for division newton raphson iteration
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2019-09-23 22:48:06 -04:00 |
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Jeff Wang
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52ddf7dd96
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do not require BDecn to be preserved (frees up some xdata and code space)
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2019-05-02 03:49:21 -04:00 |
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Jeff Wang
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0049f3df98
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do not compile with stack auto, change functions to be nonreentrant, use fixed parameters
- frees up ~4KB of code space
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2019-05-02 03:27:01 -04:00 |
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Jeff Wang
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6399cbf44f
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modify code to use accumulator architecture to minimize pointer usage
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2019-05-01 03:54:57 -04:00 |
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Jeff Wang
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96c762aeed
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missed change for making number of exponent bits settable
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2019-05-01 01:49:16 -04:00 |
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Jeff Wang
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60ed369c47
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compare exponent directly for determining NaN
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2019-05-01 01:40:23 -04:00 |
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Jeff Wang
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58a162fe4d
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allow number of exponent bits to be adjustable
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2019-05-01 01:37:14 -04:00 |
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Jeff Wang
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4b87ad27c8
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speed up division
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2019-05-01 01:11:25 -04:00 |
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Jeff Wang
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fcf16153f6
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change exponent from int16_t to int8_t to free up some space
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2019-04-05 02:39:09 -04:00 |
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Jeff Wang
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836d4fc122
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fix emulator lcd/calculator thread startup race
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2019-04-05 02:10:10 -04:00 |
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Jeff Wang
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8da85b8b6d
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update picture of calculator
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2019-04-05 01:49:59 -04:00 |
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Jeff Wang
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ccbcab2114
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update readme
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2019-04-05 01:36:14 -04:00 |
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Jeff Wang
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7ecec90269
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binaries for previous commit (v1.00)
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2019-04-05 01:11:28 -04:00 |
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Jeff Wang
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20946c44d4
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detect division by 0
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2019-04-05 01:07:42 -04:00 |
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Jeff Wang
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ef298cddd0
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fix crash when displaying numbers between [0.1, 1)
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2019-04-05 00:52:56 -04:00 |
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Jeff Wang
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66c611795e
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allow printing unknown characters in lcd emulator
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2019-04-05 00:47:21 -04:00 |
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Jeff Wang
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ee917a71e5
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add version string at poweron, also check for poweroff keys in interrupt
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2019-04-05 00:47:07 -04:00 |
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Jeff Wang
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8af9701e15
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bugfix for entering numbers such as 0.33
this is a partial revert of commit 8550049335
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2019-04-04 03:36:35 -04:00 |
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Jeff Wang
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240dd570ae
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fix for LCD row tracking, fix for "phantom" keypress at powerup
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2019-04-04 03:01:33 -04:00 |
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Jeff Wang
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4734fe5a0e
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add keyboard, fix display of negative numbers
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2019-04-04 02:46:10 -04:00 |
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Jeff Wang
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8550049335
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fix bug for entering numbers such as 0.01
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2019-04-04 02:29:11 -04:00 |
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Jeff Wang
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cb255bc7d1
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fix quitting
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2019-04-04 02:08:22 -04:00 |
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