ARM backend support for pld (preload data) instruction

test/cctest/test-disasm-arm.cc

Index: test/cctest/test-disasm-arm.cc
===================================================================
--- test/cctest/test-disasm-arm.cc	(revision 13713)
+++ test/cctest/test-disasm-arm.cc	(working copy)
@@ -863,3 +863,26 @@
 
   VERIFY_RUN();
 }
+
+
+TEST(Preload) {
+  SET_UP();
+
+  COMPARE(pld(MemOperand(r1)),
+          "f5d1f000       pld [r1, #+0]");
+  COMPARE(pld(MemOperand(r2, 4)),
+          "f5d2f004       pld [r2, #+4]");
+  COMPARE(pld(MemOperand(r3, -8)),
+          "f553f008       pld [r3, #-8]");
+  COMPARE(pld(MemOperand(r1, r2)),
+          "f7d1f002       pld [r1, +r2]");
+  COMPARE(pld(MemOperand(r4, r5, NegOffset)),
+          "f754f005       pld [r4, -r5]");
+  COMPARE(pld(MemOperand(r1, r2, ASR, 2)),
+          "f7d1f142       pld [r1, +r2, asr #2]");
+  COMPARE(pld(MemOperand(r3, r4, LSL, 8, NegOffset)),
+          "f753f404       pld [r3, -r4, lsl #8]");
+
+  VERIFY_RUN();
+}
+