Mesa (7.10): llvmpipe: document issue with LLVM 2.8 and earlier with AVX
Jose Fonseca
jrfonseca at kemper.freedesktop.org
Wed Apr 20 09:31:28 UTC 2011
Module: Mesa
Branch: 7.10
Commit: d4a82b3146b4ea26ca7c315343d82f796a2f19d3
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=d4a82b3146b4ea26ca7c315343d82f796a2f19d3
Author: Brian Paul <brianp at vmware.com>
Date: Thu Apr 7 13:43:00 2011 -0600
llvmpipe: document issue with LLVM 2.8 and earlier with AVX
---
src/gallium/drivers/llvmpipe/README | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/src/gallium/drivers/llvmpipe/README b/src/gallium/drivers/llvmpipe/README
index 1fc7746..cd0e476 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:
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