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a simple 6502 compiler

Started by	mmphosis <mmphosis@macgui.com>
First post	2020-12-30 15:01 +0000
Last post	2021-03-19 11:14 -0700
Articles	3 — 3 participants

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  a simple 6502 compiler mmphosis <mmphosis@macgui.com> - 2020-12-30 15:01 +0000
    Re: a simple 6502 compiler kegs@provalid.com (Kent Dickey) - 2020-12-30 17:22 -0600
      Re: a simple 6502 compiler Michael Pohoreski <michael.pohoreski@gmail.com> - 2021-03-19 11:14 -0700

#5736 — a simple 6502 compiler

From	mmphosis <mmphosis@macgui.com>
Date	2020-12-30 15:01 +0000
Subject	a simple 6502 compiler
Message-ID	<mmphosis-1609340460@macgui.com>

A 6502 compiler specializing in 16-bit integer math and brute force loop
unrolling

https://github.com/glouw/ctl/blob/master/examples/6502.c

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#5737

From	kegs@provalid.com (Kent Dickey)
Date	2020-12-30 17:22 -0600
Message-ID	<JbidnQFcTeknlnDCnZ2dnUU7-VXNnZ2d@giganews.com>
In reply to	#5736

In article <mmphosis-1609340460@macgui.com>,
mmphosis  <mmphosis@macgui.com> wrote:
>A 6502 compiler specializing in 16-bit integer math and brute force loop
>unrolling
>
>https://github.com/glouw/ctl/blob/master/examples/6502.c

It looks like it compiles something to 6502 code.  But I'm not sure what.
Can you provide a source example and the 6502 output as an example?
It looks like "boids()" calls compile on some C-like code, but it's not C.

Kent

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#5767

From	Michael Pohoreski <michael.pohoreski@gmail.com>
Date	2021-03-19 11:14 -0700
Message-ID	<f6be4c0b-6af1-4e99-a486-cbf9ed70c7cbn@googlegroups.com>
In reply to	#5737

On Wednesday, December 30, 2020 at 3:22:40 PM UTC-8, Kent Dickey wrote:
> It looks like it compiles something to 6502 code. But I'm not sure what. 
> Can you provide a source example and the 6502 output as an example? 
> It looks like "boids()" calls compile on some C-like code, but it's not C. 

It's C with extensions.
e.g.
https://github.com/glouw/ctl/blob/master/examples/6502.c#L1068
setup(void)
    keytype("i16", DEFAULT_WORD_SIZE);
    keytype("u16", DEFAULT_WORD_SIZE);
    keytype("u8", DEFAULT_BYTE_SIZE);
    keytype("i8", DEFAULT_BYTE_SIZE);
    keyword("unroll");
    keyword("if");

The data type are just typedefs / aliases for  standard "int16_t", "uint16_t", etc.

What makes it non-standard is that the for-loop command, "unroll", is using a custom macro mark-up with $ for variables:
            "unroll($X, $I : x)\n"

m.

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