UltraSPARC performance "tune-up."

1 files changed, 8 insertions, 0 deletions

diff --git a/PROBLEMS b/PROBLEMS
index 56bc73816b..4bf31303be 100644
--- a/PROBLEMS
+++ b/PROBLEMS
@@ -62,3 +62,11 @@ What happens is that gcc might optimize a little too agressively, and
 you end up with an extra incrementation when *header != '4'.
 
 We recommend that you upgrade gcc to as high a 3.x version as you can.
+
+* solaris64-sparcv9-cc SHA-1 performance with WorkShop 6 compiler.
+
+As subject suggests SHA-1 might perform poorly (4 times slower)
+if compiled with WorkShop 6 compiler and -xarch=v9. The cause for
+this seems to be the fact that compiler emits multiplication to
+perform shift operations:-( To work the problem around configure
+with './Configure solaris64-sparcv9-cc -DMD32_REG_T=int'.