Bug 1290812 - Part 11: Implement the 64bit variant of ExtendInt32toInt64 on mips64. r=h4writer

---
 js/src/jit/mips-shared/Lowering-mips-shared.cpp |  2 +-
 js/src/jit/mips64/CodeGenerator-mips64.cpp      | 12 ++++++++++++
 js/src/jit/mips64/CodeGenerator-mips64.h        |  1 +
 3 files changed, 14 insertions(+), 1 deletion(-)

js/src/jit/mips-shared/Lowering-mips-shared.cpp

@@ -678,5 +678,5 @@ LIRGeneratorMIPSShared::visitCopySign(MCopySign* ins)
 void
 LIRGeneratorMIPSShared::visitExtendInt32ToInt64(MExtendInt32ToInt64* ins)
 {
-    MOZ_CRASH("NYI");
+    defineInt64(new(alloc()) LExtendInt32ToInt64(useRegisterAtStart(ins->input())), ins);
 }

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

@@ -476,6 +476,18 @@ CodeGeneratorMIPS64::visitAsmReinterpretToI64(LAsmReinterpretToI64* lir)
     masm.as_dmfc1(ToRegister(lir->output()), ToFloatRegister(lir->input()));
 }
 
+void
+CodeGeneratorMIPS64::visitExtendInt32ToInt64(LExtendInt32ToInt64* lir)
+{
+    const LAllocation* input = lir->getOperand(0);
+    Register output = ToRegister(lir->output());
+
+    if (lir->mir()->isUnsigned())
+        masm.ma_dext(output, ToRegister(input), Imm32(0), Imm32(32));
+    else
+        masm.ma_sll(output, ToRegister(input), Imm32(0));
+}
+
 void
 CodeGeneratorMIPS64::setReturnDoubleRegs(LiveRegisterSet* regs)
 {

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

@@ -52,6 +52,7 @@ class CodeGeneratorMIPS64 : public CodeGeneratorMIPSShared
     void visitAsmSelectI64(LAsmSelectI64* ins);
     void visitAsmReinterpretFromI64(LAsmReinterpretFromI64* lir);
     void visitAsmReinterpretToI64(LAsmReinterpretToI64* lir);
+    void visitExtendInt32ToInt64(LExtendInt32ToInt64* lir);
 
     // Out of line visitors.
     void visitOutOfLineBailout(OutOfLineBailout* ool);