Commit graph

9 commits

Author SHA1 Message Date
David Given d63a359a49 Fix nearly all the comparisons, a lot of which were broken. Using a rst for
unsigned comparisons is surprisingly not that useful due to marshalling
overhead; it's only four bytes to do inline (plus jc), or six for a constant.
Also add some useful top optimisations.  Star Trek goes from 39890 to 39450
bytes.
2019-02-15 21:30:27 +01:00
David Given 91c75f81b5 Call cmps rather than cmpu for bge... make cmps and cmpu rsts. Apply various
other tiny optimisations.
2019-02-15 00:38:39 +01:00
David Given 79a38ecc08 Instead of using parameterised rsts for stack access, add a huge swathe of
automatically built helper tools. Star Trek goes up from 40243 to 40779 bytes,
but should be a lot faster.
2019-02-13 22:45:22 +01:00
David Given 360e1525ae Replace the non-working Z80 style signed comparison sign adjustment with
something which actually works on the 8080. Sadly, Star Trek is up to
40243 bytes again.
2019-02-12 11:57:37 +01:00
David Given f1b128baeb Signed comparisons now work correctly; sadly, Star Trek increases from 39656 to
39726 bytes. Note that the emulator doesn't set P/V correctly and all the tests
fail. Testing in z80ex works fine.
2019-02-11 20:46:06 +01:00
David Given 10b509d6b6 Add rst 3 to get the address of a frame variable; lots of rule overhaulage.
Reduces Star Trek from 41821 to 41055 bytes.
2019-02-09 13:29:41 +01:00
David Given a91ab5c599 Somehow the implementation of rst 2 got lost, with hilarious results. Also fix
some register corruption issues (I hope).
2019-02-08 21:35:14 +01:00
David Given 9d8ea79c7f rst 1 now takes an eight-bit parameter, not a 16 bit one. Reduces Star Trek
again from 43205 to 42339 bytes.
2019-02-07 08:45:20 +01:00
David Given 5ac280026e Experimentally use rst 1 to optimise frame variable loads. Reduces Star Trek
from 43892 to 43205 bytes.
2019-02-07 00:06:32 +01:00