Enable no-LUT transcendentals by default on newer platforms.

This patch enables by default new transcendentals implementations newer
platforms. The new implementations are expeced to be both more
performant and more accurate.

IGC/Compiler/Optimizer/BuiltInFuncImport.cpp

@@ -1113,7 +1113,11 @@ void BIImport::InitializeBIFlags(Module& M)
         initializeVarWithValue("__APIRS", false);
     }
 
-    bool useHighAccuracyMathFuncs = false;
+    // High accuracy implementations are also more performant on newer cores,
+    // select them by default.
+    bool useHighAccuracyMathFuncs =
+                  pCtx->platform.isProductChildOf(IGFX_PVC);
+
     if (pCtx->type == ShaderType::OPENCL_SHADER)
     {
         OpenCLProgramContext *OCLContext = static_cast<OpenCLProgramContext*>(pCtx);
@@ -1123,7 +1127,7 @@ void BIImport::InitializeBIFlags(Module& M)
         float profilingTimerResolution = OCLContext->getProfilingTimerResolution();
         initializeVarWithValue("__ProfilingTimerResolution", *reinterpret_cast<int*>(&profilingTimerResolution));
 
-        useHighAccuracyMathFuncs = OCLContext->m_InternalOptions.UseHighAccuracyMathFuncs;
+        useHighAccuracyMathFuncs = useHighAccuracyMathFuncs || OCLContext->m_InternalOptions.UseHighAccuracyMathFuncs;
 
         initializeVarWithValue("__UseLSC", pCtx->platform.hasLSC());
         initializeVarWithValue("__ForceL1Prefetch", IGC_IS_FLAG_ENABLED(ForcePrefetchToL1Cache) ? 1 : 0);