[commit: ghc] master: add more information about the nature of support of prefetch primops on none x86/AMD64 -fasm platforms (and -fvia) to the 7.8 release notes (27fe128)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/27fe12856a34488ea94291990238c37e5353d1a3/ghc

>---------------------------------------------------------------

commit 27fe12856a34488ea94291990238c37e5353d1a3
Author: Carter Tazio Schonwald <carter.schonwald at gmail.com>
Date:   Thu Jan 30 12:27:35 2014 -0500

    add more information about the nature of support of prefetch primops on none x86/AMD64 -fasm platforms (and -fvia)
    to the 7.8 release notes
    
    Signed-off-by: Austin Seipp <austin at well-typed.com>


>---------------------------------------------------------------

27fe12856a34488ea94291990238c37e5353d1a3
 docs/users_guide/7.8.1-notes.xml |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/docs/users_guide/7.8.1-notes.xml b/docs/users_guide/7.8.1-notes.xml
index c60bacf..7568246 100644
--- a/docs/users_guide/7.8.1-notes.xml
+++ b/docs/users_guide/7.8.1-notes.xml
@@ -554,8 +554,12 @@
                     guide the processor's caching decisions.
                </para>
                 <para>
-                    Currently, these are only supported with the LLVM
-                    backend and x86/amd64 backends.
+                    Currently, the primops get translated into
+                    the associated hardware supported prefetch
+                    instructions only with the LLVM backend and
+                    x86/amd64 backends. On all other backends,
+                    the prefetch primops are currently erased
+                    at code generation time.
                </para>
            </listitem>
        </itemizedlist>