From: Brian Paul <brianp@vmware.com>
Date: Thu, 7 Apr 2011 19:43:00 +0000 (-0600)
Subject: llvmpipe: document issue with LLVM 2.8 and earlier with AVX
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=06613b7b3a641b66400f09993a884daf7ab34509;p=mesa.git

llvmpipe: document issue with LLVM 2.8 and earlier with AVX
---

diff --git a/src/gallium/drivers/llvmpipe/README b/src/gallium/drivers/llvmpipe/README
index 1fc7746a834..cd0e476e73b 100644
--- 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: