commit a1756896546fccf39eef6f282dcbd2f9292c1286
author Richard Henderson <rth@twiddle.net> Thu May 15 00:09:47 2014 -0400
committer Richard Henderson <rth@twiddle.net> Thu May 15 00:09:47 2014 -0400
tree 6cc2c1a9712c9f169e1f6d7db35bf64be0c9e2f6
parent 450445d543a33fdb1d18a18ab7669a33dc1ca7ae

tcg-s390: Fix off-by-one in wraparound andi

Signed-off-by: Richard Henderson <rth@twiddle.net>

tcg/s390/tcg-target.c

diff --git a/tcg/s390/tcg-target.c b/tcg/s390/tcg-target.c
index ebdd074..0f972ae 100644
--- a/tcg/s390/tcg-target.c
+++ b/tcg/s390/tcg-target.c
@@ -983,8 +983,8 @@
         int msb, lsb;
         if ((val & 0x8000000000000001ull) == 0x8000000000000001ull) {
             /* Achieve wraparound by swapping msb and lsb.  */
-            msb = 63 - ctz64(~val);
-            lsb = clz64(~val) + 1;
+            msb = 64 - ctz64(~val);
+            lsb = clz64(~val) - 1;
         } else {
             msb = clz64(val);
             lsb = 63 - ctz64(val);