Bug 1258910 - OdinMonkey: MIPS64: Implement AsmSelectI64. r=bbouvier

---
 js/src/jit/mips64/CodeGenerator-mips64.cpp | 21 +++++++++++++++++++++
 js/src/jit/mips64/CodeGenerator-mips64.h   |  1 +
 2 files changed, 22 insertions(+)

js/src/jit/mips64/CodeGenerator-mips64.cpp

@@ -278,6 +278,27 @@ CodeGeneratorMIPS64::visitCompareBitwiseAndBranch(LCompareBitwiseAndBranch* lir)
     emitBranch(lhs.valueReg(), rhs.valueReg(), cond, lir->ifTrue(), lir->ifFalse());
 }
 
+void
+CodeGeneratorMIPS64::visitAsmSelectI64(LAsmSelectI64* lir)
+{
+    MOZ_ASSERT(lir->mir()->type() == MIRType_Int64);
+
+    Register cond = ToRegister(lir->condExpr());
+    Operand falseExpr = ToOperand(lir->falseExpr());
+
+    Register out = ToRegister(lir->output());
+    MOZ_ASSERT(ToRegister(lir->trueExpr()) == out, "true expr is reused for input");
+
+    if (falseExpr.getTag() == Operand::REG) {
+        masm.as_movz(out, falseExpr.toReg(), cond);
+    } else {
+        Label done;
+        masm.ma_b(cond, cond, &done, Assembler::NonZero, ShortJump);
+        masm.loadPtr(falseExpr.toAddress(), out);
+        masm.bind(&done);
+    }
+}
+
 void
 CodeGeneratorMIPS64::setReturnDoubleRegs(LiveRegisterSet* regs)
 {

js/src/jit/mips64/CodeGenerator-mips64.h

@@ -44,6 +44,7 @@ class CodeGeneratorMIPS64 : public CodeGeneratorMIPSShared
     virtual void visitCompareBAndBranch(LCompareBAndBranch* lir);
     virtual void visitCompareBitwise(LCompareBitwise* lir);
     virtual void visitCompareBitwiseAndBranch(LCompareBitwiseAndBranch* lir);
+    virtual void visitAsmSelectI64(LAsmSelectI64* ins);
 
     // Out of line visitors.
     void visitOutOfLineBailout(OutOfLineBailout* ool);