--- a/hotspot/src/cpu/x86/vm/x86_64.ad Tue Jan 28 12:25:34 2014 -0800
+++ b/hotspot/src/cpu/x86/vm/x86_64.ad Tue Jan 28 12:28:17 2014 -0800
@@ -3094,6 +3094,17 @@
interface(CONST_INTER);
%}
+// Int Immediate non-negative
+operand immU31()
+%{
+ predicate(n->get_int() >= 0);
+ match(ConI);
+
+ op_cost(0);
+ format %{ %}
+ interface(CONST_INTER);
+%}
+
// Constant for long shifts
operand immI_32()
%{
@@ -5050,12 +5061,12 @@
ins_pipe(ialu_reg_mem);
%}
-// Load Integer with a 32-bit mask into Long Register
-instruct loadI2L_immI(rRegL dst, memory mem, immI mask, rFlagsReg cr) %{
+// Load Integer with a 31-bit mask into Long Register
+instruct loadI2L_immU31(rRegL dst, memory mem, immU31 mask, rFlagsReg cr) %{
match(Set dst (ConvI2L (AndI (LoadI mem) mask)));
effect(KILL cr);
- format %{ "movl $dst, $mem\t# int & 32-bit mask -> long\n\t"
+ format %{ "movl $dst, $mem\t# int & 31-bit mask -> long\n\t"
"andl $dst, $mask" %}
ins_encode %{
Register Rdst = $dst$$Register;