[turbofan] Introduce Float64Pow and NumberPow operators.

src/compiler/ia32/code-generator-ia32.cc

Index: src/compiler/ia32/code-generator-ia32.cc
diff --git a/src/compiler/ia32/code-generator-ia32.cc b/src/compiler/ia32/code-generator-ia32.cc
index 6df22f6d5f44d52fad748e958a584be537e27c16..9ffc1c51b9edddfc1aebc7f017a9079ad25e84db 100644
--- a/src/compiler/ia32/code-generator-ia32.cc
+++ b/src/compiler/ia32/code-generator-ia32.cc
@@ -682,6 +682,21 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
     case kIeee754Float64Log10:
       ASSEMBLE_IEEE754_UNOP(log10);
       break;
+    case kIeee754Float64Pow: {
+      // TODO(bmeurer): Improve integration of the stub.
+      if (!i.InputDoubleRegister(1).is(xmm2)) {
+        __ movaps(xmm2, i.InputDoubleRegister(0));
+        __ movaps(xmm1, i.InputDoubleRegister(1));
+      } else {
+        __ movaps(xmm0, i.InputDoubleRegister(0));
+        __ movaps(xmm1, xmm2);
+        __ movaps(xmm2, xmm0);
+      }
+      MathPowStub stub(isolate(), MathPowStub::DOUBLE);
+      __ CallStub(&stub);
+      __ movaps(i.OutputDoubleRegister(), xmm3);
+      break;
+    }
     case kIeee754Float64Sin:
       ASSEMBLE_IEEE754_UNOP(sin);
       break;