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llvmpipe: document issue with LLVM 2.8 and earlier with AVX
author
Brian Paul
<brianp@vmware.com>
Thu, 7 Apr 2011 19:43:00 +0000
(13:43 -0600)
committer
Brian Paul
<brianp@vmware.com>
Thu, 7 Apr 2011 19:43:00 +0000
(13:43 -0600)
src/gallium/drivers/llvmpipe/README
patch
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diff --git
a/src/gallium/drivers/llvmpipe/README
b/src/gallium/drivers/llvmpipe/README
index
1fc7746
..
cd0e476
100644
(file)
--- a/
src/gallium/drivers/llvmpipe/README
+++ b/
src/gallium/drivers/llvmpipe/README
@@
-13,6
+13,10
@@
Requirements
See /proc/cpuinfo to know what your CPU supports.
- LLVM. Version 2.8 recommended. 2.6 or later required.
+
+ NOTE: LLVM 2.8 and earlier will not work on systems that support the
+ Intel AVX extensions (e.g. Sandybridge). LLVM's code generator will
+ fail when trying to emit AVX instructions. This was fixed in LLVM 2.9.
For Linux, on a recent Debian based distribution do: