----- Alkuperäinen viesti -----
Lähettäjä: Erik Schnetter <[email protected]>
Vastaanottaja: Pekka Jääskeläinen <[email protected]>
Kopio: Portable Computing Language development discussion
<[email protected]>; Kalle Raiskila <[email protected]>
Lähetetty: sunnuntai 8.syyskuuta 2013 23.53
Aihe: Re: [pocl-devel] Triples, targets, cpus, and features... and HOST vs.
TARGET
> The asm inline statements are gone (in Vecmathlib); it's all done via
> intrinsics and Clang extensions.
No they are not. Some intrinsics are just inline assembly wrappers.
And e.g. lines like "atan.cc.ll: %2 = call <4 x float>
@llvm.x86.sse.sqrt.ps(<4 x float> %1) #0"
are left in the kernel.bc
Perhaps all these sort of inline assembly calls are actually defined as the
part of the minimum set that is x86_64?
But that still doesn't remove the issue. Binary distributions are compiled
with this minumum set, not with AVX.
> Some CPU attributes influence the ABI. These need to be set correctly at all
> times, otherwise the executable won't work. This influences e.g. the calling
> conventions for functions, which > is explicitly represented in bytecode.
> That is, a fully generic bytecode library is not possible, but we may be able
> to get away with using just a few per architecture.
But these ABIs and calling conventions are internal to the OCL kernel. The only
place we need to worry about it is in the call to the __kernel function. And
that is never one of the functions in the runtime kernel library. (right?)
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