[Xen-changelog] [xen master] x86/memcpy: reduce code size

[patchbot@xxxxxxx]

commit 5e4a6f5473f86423f35425ee0e063398422f7af2
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Wed Jun 3 09:28:05 2015 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Jun 3 09:28:05 2015 +0200

    x86/memcpy: reduce code size
    
    'n % BYTES_PER_LONG' is at most 7, and doesn't need a 64bit register mov.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/string.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/xen/arch/x86/string.c b/xen/arch/x86/string.c
index 3af0ea8..043ae66 100644
--- a/xen/arch/x86/string.c
+++ b/xen/arch/x86/string.c
@@ -15,7 +15,7 @@ void *memcpy(void *dest, const void *src, size_t n)
 
     asm volatile (
         "   rep ; movs"__OS" ; "
-        "   mov %4,%3        ; "
+        "   mov %k4,%k3      ; "
         "   rep ; movsb        "
         : "=&c" (d0), "=&D" (d1), "=&S" (d2)
         : "0" (n/BYTES_PER_LONG), "r" (n%BYTES_PER_LONG), "1" (dest), "2" (src)
--
generated by git-patchbot for /home/xen/git/xen.git#master

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