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Nick Downing [Sun, 16 Jun 2019 06:20:13 +0000 (16:20 +1000)]
First cut at more efficient smodal stack machine using several interpreter pages
Nick Downing [Thu, 13 Jun 2019 16:32:49 +0000 (02:32 +1000)]
Add CORDIC demo code from Peter Knoppers (DDJ article)
Nick Downing [Thu, 13 Jun 2019 16:24:33 +0000 (02:24 +1000)]
Unroll the multiply, reinstate the state machine test code
Nick Downing [Thu, 13 Jun 2019 16:12:01 +0000 (02:12 +1000)]
Minor optimization due to unrolled loop not using b anymore
Nick Downing [Thu, 13 Jun 2019 16:07:13 +0000 (02:07 +1000)]
Unroll 8 bits division inner loop (2 versions, 4 entry points for 4 quadrants)
Nick Downing [Thu, 13 Jun 2019 15:47:15 +0000 (01:47 +1000)]
Optimize layout of division code
Nick Downing [Thu, 13 Jun 2019 15:36:13 +0000 (01:36 +1000)]
Fix bugs, working signed division
Nick Downing [Thu, 13 Jun 2019 14:22:25 +0000 (00:22 +1000)]
First cut at the full signed division with separate code for each quadrant, some quadrants do not work yet, an issue is needing to clear cf before sbc hl,de
Nick Downing [Thu, 13 Jun 2019 12:36:10 +0000 (22:36 +1000)]
Further minor optimizations
Nick Downing [Thu, 13 Jun 2019 12:09:08 +0000 (22:09 +1000)]
Make division routine only do inc/dec on zero crossing, and other improvements
Nick Downing [Wed, 12 Jun 2019 12:39:26 +0000 (22:39 +1000)]
New non-restoring division routine, sub-optimal but justified to always work
Nick Downing [Mon, 10 Jun 2019 11:09:51 +0000 (21:09 +1000)]
Improve loops and fallthru
Nick Downing [Mon, 10 Jun 2019 10:05:44 +0000 (20:05 +1000)]
Improved way that uses cf to do most of the adjustment needed for zero crossing
Nick Downing [Mon, 10 Jun 2019 09:59:47 +0000 (19:59 +1000)]
First cut at non-restoring division
Nick Downing [Mon, 10 Jun 2019 04:02:50 +0000 (14:02 +1000)]
Add decimal factorial result printing using the division routines
Nick Downing [Mon, 10 Jun 2019 03:47:46 +0000 (13:47 +1000)]
Improve trace, add unsigned division
Nick Downing [Mon, 10 Jun 2019 00:34:14 +0000 (10:34 +1000)]
Optimize lower dispatcher used for control transfers, that takes pc in hl
Nick Downing [Mon, 10 Jun 2019 00:27:03 +0000 (10:27 +1000)]
Optimize rst 8 routine, ld hl,(bc)+
Nick Downing [Mon, 10 Jun 2019 00:18:50 +0000 (10:18 +1000)]
Exchange roles of bc and de, adjust interface to math package which doesn't use exchanged bc and de, move some routines around to allow for slightly larger math opcodes, fix a bug which caused return to BDOS not to work
Nick Downing [Sun, 9 Jun 2019 23:28:05 +0000 (09:28 +1000)]
Initial commit, can calculate a factorial recursively with C calling convetion