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Groups > sci.logic > #348294

Not declarative with PHI (Φ) nodes (Re: MIPS is a big Huffman mess [But Hack could do it])

Cross-posted to 3 groups.

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Hi,

Another choice for naming Hack, would be
to call it an intermediate format. But
this is typically used here:

The intermediate representation, or
IR for short, is an in-memory data
structure that represents executable code.
https://www.llvmpy.org/llvmpy-doc/dev/doc/llvm_concepts.html#ssa-form-and-phi-nodes

So I still like the term abstract machine,
as already used in the past by  David H. D. Warren
for the famous, and in my opinion infamous:

Warren Abstract Machine 1983
https://en.wikipedia.org/wiki/Warren_Abstract_Machine

Maybe you can take the term abstract machine
as a hint that it is more lower level, and
more imperative. Not something highlevel, that

is easily malleable. But abstract also captures
the notion that there is still a level further
down, making it concrete. And you find

many Prolog systems that did just that, they
compile WAM into a further instruction stream,
like x86 or whatever, for binary compiled code,

that is not interpreted WAM.

Bye

Mild Shock schrieb:
 > Hi,
 >
 > There is Prolog compiler which spits out Hack.
 >  From there on your are free to develop
 > and/or use any Hack realization that goes
 >
 > from abstract to concrete. You could
 > replace the CPU backends that realize
 > a Hack VM by MIPS. Shouldn't be difficult.
 >
 > Basically I refused to think in Huffman
 > Coding (*) while designing Hack VM. On the
 > other hand the MIPS architecture looks
 >
 > like a big Huffman mess. Already its
 > initial design has 3 instructions types:
 >
 > Type format (bits)
 > R opcode(6) rs(5) rt(5) rd(5) shamt(5) funct(6)
 > I opcode(6) rs(5) rt(5) imme(16)
 > J opcode(6) addr(26)
 >
 > While my Hack has only 1 instruction
 > type, when binary encoded for Hack VM,
 > the currently used design looks as follows:
 >
 > Type format (bits)
 > AD opcode(4) mode(4) cond(4) imme(10) addr(10)
 >
 > But since its an abstract machine, nothing
 > prevents you from translating Hack code
 > into MIPS before executing it.
 >
 > In has far you have to distinguish Hack,
 > which is specified in Prolog. And Hack VM
 > which is a virtual machine, with the above
 >
 > instruction packing. And which has currently
 > a JavaScript runtime, a Python runtime
 > and a Java runtime.
 >
 > Bye
 >
 > (*)
 > https://en.wikipedia.org/wiki/Huffman_coding
 >

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The Wuhan Virus that destroyed Python [ggml Manifesto] Mild Shock <janburse@fastmail.fm> - 2026-07-22 21:01 +0200
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      Trivial balancing example for (int i=0; i<global_id; i++) (Re: Why do you even need a mpmc queue? [Thunder Kittens]) Mild Shock <janburse@fastmail.fm> - 2026-07-23 08:55 +0200
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      And, where did I talk about rockets? [Hint its about xAI's Grok] (Re: Why do you even need a mpmc queue? [Thunder Kittens]) Mild Shock <janburse@fastmail.fm> - 2026-07-25 01:25 +0200
        Why forget something, that was never on my mind (Re: And, where did I talk about rockets? [Hint its about xAI's Grok]) Mild Shock <janburse@fastmail.fm> - 2026-07-25 09:49 +0200
      Example Mandel Brot rendering [Faster with MIMD] (Was: Why do you even need a mpmc queue? [Thunder Kittens]) Mild Shock <janburse@fastmail.fm> - 2026-07-25 09:56 +0200
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      Micro penis mother sung arias (Re: NVIDIA evacuated its Chinese market [Tau Scaling]) Mild Shock <janburse@fastmail.fm> - 2026-07-24 14:40 +0200
        Micro penis brain is in constant hiatus (Re: Micro penis mother sung arias) Mild Shock <janburse@fastmail.fm> - 2026-07-24 15:27 +0200
          Ignoramus or Ignorabimus: I don't care [(Re: Micro penis brain is in constant hiatus (Re: Micro penis mother sung arias) Mild Shock <janburse@fastmail.fm> - 2026-07-24 15:35 +0200
            You are a moron, brainless putin payed (Re: Ignoramus or Ignorabimus: I don't care) Mild Shock <janburse@fastmail.fm> - 2026-07-24 18:01 +0200
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        You are still chewing on SIMD. LoL (Re: Rossy Boy is neither Einstein nor Zweistein) Mild Shock <janburse@fastmail.fm> - 2026-07-29 17:12 +0200
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                I wrote Hack VM for π-WAM from scratch [4 Months total JavaScript, Python and Java] (Re: Hack ecosystem ignorance paired with paranoia) Mild Shock <janburse@fastmail.fm> - 2026-07-30 19:37 +0200
                For WebGPU I first had SIMD in mind (Re: I wrote Hack VM for π-WAM from scratch) Mild Shock <janburse@fastmail.fm> - 2026-07-30 19:51 +0200
                Corr.: 4 Months --> 4 Weeks (Re: For WebGPU I first had SIMD in mind) Mild Shock <janburse@fastmail.fm> - 2026-07-30 20:05 +0200
                MIPS is a big Huffman mess [But Hack could do it] (Re: I wrote Hack VM for π-WAM from scratch) Mild Shock <janburse@fastmail.fm> - 2026-07-30 22:32 +0200
                Not declarative with PHI (Φ) nodes (Was: MIPS is a big Huffman mess [But Hack could do it]) Mild Shock <janburse@fastmail.fm> - 2026-07-30 22:38 +0200
                Not declarative with PHI (Φ) nodes (Re: MIPS is a big Huffman mess [But Hack could do it]) Mild Shock <janburse@fastmail.fm> - 2026-07-30 22:39 +0200
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