# HG changeset patch
# User goetz
# Date 1477563748 -7200
#      Thu Oct 27 12:22:28 2016 +0200
# Node ID 9b9d9e11c04d5e5f64829d34752e5c94b1c7d911
# Parent  92f0dbe76a13992cc27188e0f68e4b1771c7004a
8168318, PR3466, RH1498320: PPC64: Use cmpldi instead of li/cmpld
Reviewed-by: goetz
Contributed-by: igor.nunes@eldorado.org.br

diff --git a/src/cpu/ppc/vm/ppc.ad b/src/cpu/ppc/vm/ppc.ad
--- openjdk/hotspot/src/cpu/ppc/vm/ppc.ad
+++ openjdk/hotspot/src/cpu/ppc/vm/ppc.ad
@@ -10571,6 +10571,17 @@
   ins_pipe(pipe_class_compare);
 %}
 
+instruct cmpP_reg_null(flagsReg crx, iRegP_N2P src1, immP_0or1 src2) %{
+  match(Set crx (CmpP src1 src2));
+  format %{ "CMPLDI   $crx, $src1, $src2 \t// ptr" %}
+  size(4);
+  ins_encode %{
+    // TODO: PPC port $archOpcode(ppc64Opcode_cmpl);
+    __ cmpldi($crx$$CondRegister, $src1$$Register, (int)((short)($src2$$constant & 0xFFFF)));
+  %}
+  ins_pipe(pipe_class_compare);
+%}
+
 // Used in postalloc expand.
 instruct cmpP_reg_imm16(flagsReg crx, iRegPsrc src1, immL16 src2) %{
   // This match rule prevents reordering of node before a safepoint.