Re: [Tack-devel] arm and powerpc assembly
Moved to https://github.com/davidgiven/ack
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From: David G. <dg...@co...> - 2013-05-10 11:13:36
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David Given wrote: [...] > I'd also modified aelflod to generate non-386 ELF files, but George > Koehler's patch was better than mine so I've replaced it with his. The > linux386, linuxppc and linux68k platforms all now generate executables. I've merged all this into trunk (except the stack offset changes in the code generator). linux68k is enabled by default. linuxppc is *not* enabled by default. It turns out that when compiling the code generator table for PowerPC, ncgg repeatedly errors out with: Previous rule impossible on empty stack One of the rules that's causing this is as follows: pat adf $1==INT32 /* Add single */ with FS FS uses reusing %1, FREG gen fadds {FS, %a}, %2, %1 yields {FS, %a} (The full file is here: http://tack.hg.sourceforge.net/hgweb/tack/tack/file/4fe6836f55cb/mach/powerpc/ncg/table) It would seem that back when I was doing all this, I managed to work around the error by simply commenting out the code that makes the error in ncgg! I don't actually know what the error means. I assume it's something to do with the contents of the fake stack. But I don't know why having the fake stack be empty is a problem --- surely the code generator would just coerce values onto it if needed? I realise that the number of people who still know about this level of detail is approximately nil, but... any suggestions? -- ┌─── dg@cowlark.com ───── http://www.cowlark.com ───── │ │ 𝕻𝖍'𝖓𝖌𝖑𝖚𝖎 𝖒𝖌𝖑𝖜'𝖓𝖆𝖋𝖍 𝕮𝖙𝖍𝖚𝖑𝖍𝖚 𝕽'𝖑𝖞𝖊𝖍 𝖜𝖌𝖆𝖍'𝖓𝖆𝖌𝖑 𝖋𝖍𝖙𝖆𝖌𝖓. │ |