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gallivm: disable NEON instructions if they are not supported

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The LLVM project made some questionable decisions about defaults for
armv7 (e.g. they enable NEON that is not there on NVIDIA and Marvell
platforms).

On top of that, getHostCPUFeatures() doesn't disable missing machine
attributes. Finally, -neon alone is not sufficient to disable emmision
of NEON instructions.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Cc: <mesa-stable@lists.freedesktop.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Lubomir Rintel 2019-03-11 21:18:48 +01:00 • committed by Matt Turner
parent bc6bfc861f
commit e983a975c6
1 changed files with 7 additions and 0 deletions
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7
src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
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@ -625,6 +625,13 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
MAttrs.push_back("-avx512vl");
#endif
#endif
#if defined(PIPE_ARCH_ARM)
if (!util_cpu_caps.has_neon) {
MAttrs.push_back("-neon");
MAttrs.push_back("-crypto");
MAttrs.push_back("-vfp2");
}
#endif
#if defined(PIPE_ARCH_PPC)
MAttrs.push_back(util_cpu_caps.has_altivec ? "+altivec" : "-altivec");