target/arm: Fix ubfx et al for aarch64

The patch in 59a71b4c5b4e suffered from a merge failure
when compared to the original patch in

  http://lists.nongnu.org/archive/html/qemu-devel/2016-12/msg00137.html

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

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 4f09dfb..d0352e2 100644 (file)
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -3217,7 +3217,7 @@ static void disas_bitfield(DisasContext *s, uint32_t insn)
     tcg_tmp = read_cpu_reg(s, rn, 1);
 
     /* Recognize simple(r) extractions.  */
-    if (si <= ri) {
+    if (si >= ri) {
         /* Wd<s-r:0> = Wn<s:r> */
         len = (si - ri) + 1;
         if (opc == 0) { /* SBFM: ASR, SBFX, SXTB, SXTH, SXTW */