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authorJosé Fonseca <[email protected]>2012-10-17 15:38:50 +0100
committerJosé Fonseca <[email protected]>2012-10-17 18:07:43 +0100
commitaa2067c757506e8f3418ef11333382a1fa45ad6e (patch)
treeabfaad0f10a0ebb17177cc9ee0475e948f95aa34 /src
parent54821c0e99615cbfb05cff3c3ef61fd26abb2907 (diff)
gallivm: Hide AVX support when requested by LP_NATIVE_VECTOR_WIDTH or unsupported by LLVM.
Reviewed-by: Roland Scheidegger <[email protected]>
Diffstat (limited to 'src')
-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_init.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_init.c b/src/gallium/auxiliary/gallivm/lp_bld_init.c
index e3b498c8770..d364390cdf0 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_init.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_init.c
@@ -458,6 +458,15 @@ lp_build_init(void)
lp_native_vector_width = debug_get_num_option("LP_NATIVE_VECTOR_WIDTH",
lp_native_vector_width);
+ if (lp_native_vector_width <= 128) {
+ /* Hide AVX support, as often LLVM AVX instrinsics are only guarded by
+ * "util_cpu_caps.has_avx" predicate, and lack the
+ * "lp_native_vector_width > 128" predicate. And also to ensure a more
+ * consistent behavior, allowing one to test SSE2 on AVX machines.
+ */
+ util_cpu_caps.has_avx = 0;
+ }
+
gallivm_initialized = TRUE;
#if 0
@@ -465,6 +474,7 @@ lp_build_init(void)
util_cpu_caps.has_sse3 = 0;
util_cpu_caps.has_ssse3 = 0;
util_cpu_caps.has_sse4_1 = 0;
+ util_cpu_caps.has_avx = 0;
#endif
}