Subzero: The cross tests should use the actual Subzero runtime.

crosstest/test_cast_main.cpp

 //===- subzero/crosstest/test_cast_main.cpp - Driver for tests ------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // Driver for crosstesting cast operations.
@@ skipping 206 matching lines @@
         Val = -Val;
       testValue<double>(Val, TotalTests, Passes, Failures, "double");
       COMPARE(castBits, double, uint64_t, Val, "double");
     }
   }
 
   std::cout << "TotalTests=" << TotalTests << " Passes=" << Passes
             << " Failures=" << Failures << "\n";
   return Failures;
 }
-
-////////////////////////////////////////////////////////////////
-
-// The following are helper definitions that should be part of the
-// Subzero runtime.
-
-extern "C" {
-uint32_t cvtdtoui32(double a) { return (uint32_t)a; }
-uint32_t cvtftoui32(float a) { return (uint32_t)a; }
-int64_t cvtdtosi64(double a) { return (int64_t)a; }
-int64_t cvtftosi64(float a) { return (int64_t)a; }
-uint64_t cvtdtoui64(double a) { return (uint64_t)a; }
-uint64_t cvtftoui64(float a) { return (uint64_t)a; }
-float cvtui64tof(uint64_t a) { return (float)a; }
-double cvtui64tod(uint64_t a) { return (double)a; }
-float cvtsi64tof(int64_t a) { return (float)a; }
-float cvtui32tof(uint32_t a) { return (float)a; }
-double cvtui32tod(uint32_t a) { return (double)a; }
-double cvtsi64tod(int64_t a) { return (double)a; }
-}