Show HN: C to Go Assembly (opens in new tab)

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98 pointskrishnasrinivas9y ago11 comments

11 comments

Probably worth mentioning the blog post too: https://blog.minio.io/c2goasm-c-to-go-assembly-bb723d2f777f

Out of curiosity, any idea how well does Go asm works with Delve (the Go debugger)?

Haven't tried it personally, but based on a recent article shared at r/golang (https://rakyll.org/coredumps/, via https://www.reddit.com/r/golang/comments/6cvtd6/debugging_go...), delve seems to show the contents of an .s file allright.

justinclift9y ago

Thanks, that's a useful article.

Just wish core dumping Go programs worked on OSX. Hopefully one day. :)

fwessels9y ago

That is a good question but have never tried it. However, there is nothing "special" about the assembly as ported by c2goasm, so it should equally well as any other (hand-crafted) assembly.

theparanoid9y ago

Go needs another option other than assembly. Either compiler intrinsics like C/C++ or something, anything, else.

tankenmate9y ago

It does, cgo.

mhh__9y ago

So, is go assembly the IR inside the Go compiler?

fwessels9y ago

No, it is not an IR code such as in Java or .Net. At compile time it is translated into opcodes for the corresponding architecture that you are compiling for.

chrisseaton9y ago

I disagree. I think saying that it's the lowered intermediate representation in the Go compiler pipeline is a really good description. It's equivalent to the LIR in Java's C2 compiler. I'm not sure what the equivalent is in .net.

Fundamentally, it's a representation and it's intermediate isn't it?

uluyol9y ago

No, not really. Go's assembly might be considered somewhat higher level than regular assembly code, but it's certainly architecture specific. The examples highlighted use x86 SIMD instructions unavailable on other architectures.

Freedoms taken by the go assemblers also seem to be decreasing as the compiler becomes smarter. E.g. instruction reordering is no longer performed (https://github.com/golang/go/issues/15837).

You can read about the assemblers here: https://golang.org/doc/asm

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11 comments

justinclift9y ago

Probably worth mentioning the blog post too: https://blog.minio.io/c2goasm-c-to-go-assembly-bb723d2f777f

Out of curiosity, any idea how well does Go asm works with Delve (the Go debugger)?

akavel9y ago

justinclift9y ago

Thanks, that's a useful article.

Just wish core dumping Go programs worked on OSX. Hopefully one day. :)

fwessels9y ago

That is a good question but have never tried it. However, there is nothing "special" about the assembly as ported by c2goasm, so it should equally well as any other (hand-crafted) assembly.

theparanoid9y ago

Go needs another option other than assembly. Either compiler intrinsics like C/C++ or something, anything, else.

tankenmate9y ago

It does, cgo.

mhh__9y ago

So, is go assembly the IR inside the Go compiler?

fwessels9y ago

No, it is not an IR code such as in Java or .Net. At compile time it is translated into opcodes for the corresponding architecture that you are compiling for.

chrisseaton9y ago

Fundamentally, it's a representation and it's intermediate isn't it?

uluyol9y ago

Freedoms taken by the go assemblers also seem to be decreasing as the compiler becomes smarter. E.g. instruction reordering is no longer performed (https://github.com/golang/go/issues/15837).

You can read about the assemblers here: https://golang.org/doc/asm

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