Ack Alternatives

ack reviews and mentions

• smarter register allocator to avoid pop immediately after push
  1 project | /r/Compilers | 14 Jun 2023

  Here's the peephole optimiser file for the 68000 on the ACK, showing what kind of optimisations you can do: https://github.com/davidgiven/ack/blob/default/mach/m68020/top/table

• Open source C23 front end - help wanted !
  2 projects | /r/Compilers | 16 May 2023

  The Amsterdam Compiler Kit: https://github.com/davidgiven/ack

• References for writing _assemblers_?
  1 project | /r/Compilers | 7 Mar 2023

  Looking at the ACK assembler which dates from the 16-bit era (https://github.com/davidgiven/ack/tree/default/mach/proto/as), it seems to hold a bitfield which tells it whether variable-sized instructions have been shortened or not. Bits are only allocated for instructions which can change length. The downside is that if you have conditionals which turn on and off sections of source based on factors which can change from pass to pass, Very Bad Things happen because it doesn't keep a mapping of which bit corresponds to which instruction. Plus, an instruction can only be shortened once. IME a naive assembler needs multiple relaxation passes to get optimal results.

• GitHub was Founded in 2008 But...
  4 projects | /r/programming | 21 Jan 2023

  Here are some that are even older: https://github.com/davidgiven/ack/commits/default/Copyright

• Questions about the 8088 and it's functionality.
  1 project | /r/retrocomputing | 8 Jan 2023

  It's not strictly bare metal, but you might be interested in this: https://github.com/davidgiven/ack/blob/default/plat/pc86/boot.s It's the startup code for running C (and other languages) from a bootable floppy. It's known at boot time that you get at least 64kB of memory at 0x07c0:0000, so we just use that.

• So this can help me with intel8080? I mean, reading the manual and understanding it? I can’t even find a compiler that uses C on windows for it.
  1 project | /r/ReverseEngineering | 1 May 2022

  The 8080 is historically interesting, but in my personal opinion kind-of a rotten CPU to develop for... the assembly mnemonics came from a time when they haven't figured out a nice way to write them yet. Also, I don't think the CPU wasn't used in that many machines and it certainly isn't common now, and as a results compilers tend to be commercial and old. (One that is not commercial is the Amsterdam Compiler Kit, but good luck getting that to work, especially if you insist on Windows...) Generally compiled languages also tended not to be used that much around that time, the lingua franca still was assembly.

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