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gallivm: Reenable PPC VSX (v3)

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Reenable the PPC64LE Vector-Scalar Extension for LLVM versions >= 3.8.1,
now that LLVM bug 26775 and its corollary, 25503, are fixed.

Amendment: remove extraneous spaces in macro def & invocations.

We would prefer a runtime check, e.g. via an LLVMQueryString
(analogous to glGetString, eglQueryString) or LLVMGetVersion API,
but no such API exists at this time.

Signed-off-by: Ben Crocker <bcrocker@redhat.com>
[Emil Velikov: remove LLVM_VERSION macro]
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
This commit is contained in:
Ben Crocker
2017-01-18 20:44:09 -05:00
committed by Emil Velikov
parent b934aae364
commit 3f1b6ef2aa
1 changed files with 13 additions and 1 deletions
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14
src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
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@@ -607,7 +607,8 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
#if defined(PIPE_ARCH_PPC)
MAttrs.push_back(util_cpu_caps.has_altivec ? "+altivec" : "-altivec");
#if HAVE_LLVM >= 0x0304
#if (HAVE_LLVM >= 0x0304)
#if (HAVE_LLVM <= 0x0307) || (HAVE_LLVM == 0x0308 && MESA_LLVM_VERSION_PATCH == 0)
/*
* Make sure VSX instructions are disabled
* See LLVM bug https://llvm.org/bugs/show_bug.cgi?id=25503#c7
@@ -615,6 +616,17 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
if (util_cpu_caps.has_altivec) {
MAttrs.push_back("-vsx");
}
#else
/*
* However, bug 25503 is fixed, by the same fix that fixed
* bug 26775, in versions of LLVM later than 3.8 (starting with 3.8.1):
* Make sure VSX instructions are ENABLED
* See LLVM bug https://llvm.org/bugs/show_bug.cgi?id=26775
*/
if (util_cpu_caps.has_altivec) {
MAttrs.push_back("+vsx");
}
#endif
#endif
#endif