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collapseos/blk/297

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z80: inline lblfind's routine into _find word
2020-07-06 12:35:54 +10:00
CODE (br)
z80: move boot code around Bring native words together, make the next/exec/does/compiled cluster be at the beginning. Next step: bring find code into _find word.
2020-07-06 12:23:40 +10:00
L1 BSET ( used in ?br and loop )
PC ORG @ 0x3d + ! ( stable ABI JP )
Make br cells 1 byte wide The 1 byte limitation has been effective for a while now, but I hadn't made the move yet, I wanted to see if the limitation would cause me problems. It doesn't. Doing this now slightly facilitates the IY->BC move in z80. Bootstrapping: if you try to recreate the CVM binary from the previous commit with this code, you'll have bootstrapping problems. The first bootstrap will compile a binary with 2-bytes wide cells but branching conditionals that yields 1-byte cells. That's bad. I got around the issue by temporarily inserting a "397 399 LOADR" instruction in cvm/xcomp.fs, right before the xcomp overrides. This way, I force 1-byte cells everywhere on the first compiliation, which then allows me to apply the logic change in cvm/vm.c and have a properly running binary.
2020-07-06 21:27:50 +10:00
E 0 IY+ LDrIXY, D 0 LDri,
7 E BIT, IFNZ, D DECr, THEN,
z80: move boot code around Bring native words together, make the next/exec/does/compiled cluster be at the beginning. Next step: bring find code into _find word.
2020-07-06 12:23:40 +10:00
DE ADDIYd,
;CODE
CODE (?br)
PC ORG @ 0x41 + ! ( stable ABI JP )
HL POP,
HLZ,
JRZ, L1 BWR ( br + 1. False, branch )
Make br cells 1 byte wide The 1 byte limitation has been effective for a while now, but I hadn't made the move yet, I wanted to see if the limitation would cause me problems. It doesn't. Doing this now slightly facilitates the IY->BC move in z80. Bootstrapping: if you try to recreate the CVM binary from the previous commit with this code, you'll have bootstrapping problems. The first bootstrap will compile a binary with 2-bytes wide cells but branching conditionals that yields 1-byte cells. That's bad. I got around the issue by temporarily inserting a "397 399 LOADR" instruction in cvm/xcomp.fs, right before the xcomp overrides. This way, I force 1-byte cells everywhere on the first compiliation, which then allows me to apply the logic change in cvm/vm.c and have a properly running binary.
2020-07-06 21:27:50 +10:00
( True, skip next byte and don't branch )
IY INCd,
z80: move boot code around Bring native words together, make the next/exec/does/compiled cluster be at the beginning. Next step: bring find code into _find word.
2020-07-06 12:23:40 +10:00
;CODE