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48727040b3
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Merge pull request #5 from ped7g/z80_ped7g
Z80 ped7g - further optimisations
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2022-09-27 22:35:44 +02:00 |
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Peter Helcmanovsky (Ped)
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8a32e1384c
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z80_unpacker: readme.txt and comment update
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2022-09-19 15:19:39 +02:00 |
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Peter Helcmanovsky (Ped)
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9913dcf4bb
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z80_unpacker: comment with possible LUT variant of updating probs value
missing 512 byte table generator, which doesn't look trivial to do
(especially in terms of code size).
Not tested, but looks as decent speed up.
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2022-09-19 14:31:00 +02:00 |
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Peter Helcmanovsky (Ped)
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a8fd3dc573
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z80_unpacker: optimisation: -1B in decode_number (fwd 170B / rev 167B)
slightly slower code, ROM unpack is back to ~22.6s
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2022-09-19 13:20:44 +02:00 |
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Peter Helcmanovsky (Ped)
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e1f9fa143a
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z80_unpacker: comment with caller size optimisation tip
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2022-09-19 11:58:32 +02:00 |
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Peter Helcmanovsky (Ped)
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db1c7d2d14
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z80_unpacker: optimisation: -1B in decode_number (fwd 171B / rev 168B)
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2022-09-19 11:49:53 +02:00 |
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Peter Helcmanovsky (Ped)
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c1ffd0e7ed
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z80_unpacker: attempt for faster decode_number (+6B, ~1% faster) => not good
archived in comments for future reference
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2022-09-19 11:42:56 +02:00 |
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Peter Helcmanovsky (Ped)
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00d084105a
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z80_unpacker: optimisation: -2B in backward unpack (fwd 172B / rev 169B)
backward was already -1B, so now the total difference is -3B.
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2022-09-19 01:31:22 +02:00 |
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Peter Helcmanovsky (Ped)
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8e5298caee
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z80_unpacker: optimisation: -1B in decode_number = 172B (but +4T per length)
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2022-09-19 01:09:21 +02:00 |
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Peter Helcmanovsky (Ped)
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1fb29f3a1b
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z80_unpacker: optimisation: -1B and -1T in decode_bit = 173B
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2022-09-18 23:44:18 +02:00 |
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c8924456aa
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-r reverses both input and output
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2022-09-18 23:38:41 +02:00 |
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7b0e22f459
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Merge pull request #3 from ped7g/z80_ped7g
backward unpacker + example extended
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2022-09-18 23:24:28 +02:00 |
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Peter Helcmanovsky (Ped)
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165f593a11
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z80_unpacker: (codestyle) whitespace + temporary label rename
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2022-09-18 23:04:37 +02:00 |
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Peter Helcmanovsky (Ped)
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d4bce4bf7c
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z80_unpacker: optimisation: -3B and ~-10T in decode_bit = 174B
unpack zx48.rom is now ~22.6s (from 23.0s)
(performance version is now 199 bytes, zx48.rom unpack 19.4s -> 19.0s)
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2022-09-18 22:54:10 +02:00 |
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Peter Helcmanovsky (Ped)
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b13fa05413
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z80_unpacker: add backward variant of unpacker + example extended
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2022-09-18 00:23:14 +02:00 |
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Peter Helcmanovsky (Ped)
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3c773aca8d
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z80_unpacker: add performance variant of depacker
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2022-09-16 03:38:03 +02:00 |
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a5406deb30
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Merge pull request #2 from ped7g/z80_ped7g
Z80 ped7g - few more optimisations for current variant of packer
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2022-09-16 00:26:55 +02:00 |
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Peter Helcmanovsky (Ped)
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9211544cb9
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z80_unpacker: add resulting snapshot file to example
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2022-09-15 18:37:06 +02:00 |
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Peter Helcmanovsky (Ped)
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3fa9e0fa12
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z80_unpacker: optimisations: 0B, -13T in decode_bit (stays 177B)
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2022-09-15 18:22:33 +02:00 |
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Peter Helcmanovsky (Ped)
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aa3fad4d80
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z80_unpacker: optimisations: -3B and ~-24T in decode_bit = 177B
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2022-09-15 18:22:32 +02:00 |
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Peter Helcmanovsky (Ped)
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6624940ed9
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z80_unpacker: optimisations: -2B and -27T in decode_bit = 180B
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2022-09-15 18:22:32 +02:00 |
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Peter Helcmanovsky (Ped)
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c3a9773e5c
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z80_unpacker: optimisations: -1B in unpack implementation = 182B
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2022-09-15 18:22:31 +02:00 |
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Peter Helcmanovsky (Ped)
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a75a35efb2
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z80_unpacker: probs context-size for offset/length numbers as EQU
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2022-09-15 18:22:27 +02:00 |
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540a91d1ba
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forgot to add back -l 9
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2022-09-15 00:18:30 +02:00 |
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e7aaf1491a
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add old-prob-update to compare script, add reverse option
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2022-09-14 23:51:38 +02:00 |
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a1dabaf7f9
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add simple script to compare compression of variants
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2022-09-14 23:41:14 +02:00 |
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75e375fb1f
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Merge branch 'ped7g-z80_ped7g' into z80
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2022-09-14 09:03:28 +02:00 |
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Peter Helcmanovsky (Ped)
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c7ea11bce3
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z80_unpacker: optimisations: -2B in unpack implementation = 183B
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2022-09-14 01:44:04 +02:00 |
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Peter Helcmanovsky (Ped)
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02d20867ee
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z80_unpacker: optimisations: -2B in unpack implementation = 185B
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2022-09-14 01:01:56 +02:00 |
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Peter Helcmanovsky (Ped)
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511ddefc08
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z80_unpacker: optimisations: -4T per offset/length bit decoded
making the 256-alignment of probs array even more baked-in, but there
was no real chance to get rid of that any way
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2022-09-14 00:01:51 +02:00 |
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Peter Helcmanovsky (Ped)
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d30baaa91f
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z80_unpacker: optimisations: -1B by keeping write_ptr in DE'
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2022-09-13 23:57:59 +02:00 |
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Peter Helcmanovsky (Ped)
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919a892ef0
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z80_unpacker: optimisations: -1B by decode_length returning CF=0
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2022-09-13 23:25:03 +02:00 |
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Peter Helcmanovsky (Ped)
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ea5c0b1b15
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z80_unpacker: optimisations: shorter >>4 in probs update
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2022-09-13 23:15:18 +02:00 |
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Peter Helcmanovsky (Ped)
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a19ec2abb7
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z80_unpacker: optimisations: remove .offset init
first offset is mandatory in packed data
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2022-09-13 22:53:15 +02:00 |
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Peter Helcmanovsky (Ped)
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7b051113e1
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z80_unpacker: initial working version with screen-slideshow example
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2022-09-13 22:12:03 +02:00 |
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f1f1c64a76
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implement simplified prob update, update unpack.c
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2022-09-10 12:01:42 +02:00 |
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36cb6d77b5
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BE bitstream, flip bit encoding
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2022-09-10 11:31:09 +02:00 |
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629c5fce7d
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optimize c_unpacker state update a bit, add -b flag to --help
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2022-09-09 19:10:31 +02:00 |
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a205473ad6
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slight optimization
v0.1.0
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2022-09-09 08:32:03 +02:00 |
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4903ac3786
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c unpacker now works
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2022-09-09 00:47:33 +02:00 |
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f817dc9254
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first try of c decompressor, not working yet
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2022-09-08 23:42:03 +02:00 |
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d93aec186c
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add compressed_size function
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2022-06-19 23:08:47 +02:00 |
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3902425922
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add bitstream variant, could be useful on 8bit platforms
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2021-12-28 23:59:56 +01:00 |
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2e7983fc65
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use u8 context entries
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2021-12-27 22:35:53 +01:00 |
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f7f891e154
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fix creating broken files if they end with a match
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2021-12-27 22:34:14 +01:00 |
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08c86af06f
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some slight tweaks to the compressed format
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2021-12-27 16:58:39 +01:00 |
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7d280bd533
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unify interface, only one pack function now
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2021-11-26 21:58:28 +01:00 |
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c0560f99a8
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add compression levels
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2021-11-26 00:01:33 +01:00 |
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5fedc032a9
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speed optimizations + progress bar
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2021-11-25 22:43:39 +01:00 |
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5e82c65c18
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a few speed and/or compression ratio improvements
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2021-11-24 22:35:24 +01:00 |
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