Revision: 6398
Author: [email protected]
Date: Wed Jan 19 05:04:21 2011
Log: ARM: Implement HasInstanceType in lithium backend.
Review URL: http://codereview.chromium.org/6283006
http://code.google.com/p/v8/source/detail?r=6398
Modified:
/branches/bleeding_edge/src/arm/lithium-codegen-arm.cc
=======================================
--- /branches/bleeding_edge/src/arm/lithium-codegen-arm.cc Wed Jan 19
03:56:32 2011
+++ /branches/bleeding_edge/src/arm/lithium-codegen-arm.cc Wed Jan 19
05:04:21 2011
@@ -1754,10 +1754,42 @@
UNREACHABLE();
return eq;
}
+
+
+static InstanceType TestType(HHasInstanceType* instr) {
+ InstanceType from = instr->from();
+ InstanceType to = instr->to();
+ if (from == FIRST_TYPE) return to;
+ ASSERT(from == to || to == LAST_TYPE);
+ return from;
+}
+
+
+static Condition BranchCondition(HHasInstanceType* instr) {
+ InstanceType from = instr->from();
+ InstanceType to = instr->to();
+ if (from == to) return eq;
+ if (to == LAST_TYPE) return hs;
+ if (from == FIRST_TYPE) return ls;
+ UNREACHABLE();
+ return eq;
+}
void LCodeGen::DoHasInstanceType(LHasInstanceType* instr) {
- Abort("DoHasInstanceType unimplemented.");
+ Register input = ToRegister(instr->input());
+ Register result = ToRegister(instr->result());
+
+ ASSERT(instr->hydrogen()->value()->representation().IsTagged());
+ Label done;
+ __ tst(input, Operand(kSmiTagMask));
+ __ LoadRoot(result, Heap::kFalseValueRootIndex, eq);
+ __ b(eq, &done);
+ __ CompareObjectType(input, result, result, TestType(instr->hydrogen()));
+ Condition cond = BranchCondition(instr->hydrogen());
+ __ LoadRoot(result, Heap::kTrueValueRootIndex, cond);
+ __ LoadRoot(result, Heap::kFalseValueRootIndex, NegateCondition(cond));
+ __ bind(&done);
}
--
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