Subzero: Use scalar arithmetic when no vector instruction exists.

crosstest/test_arith_main.cpp

 //===- subzero/crosstest/test_arith_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 arithmetic operations
@@ skipping 43 matching lines @@
     // FuncLlcSigned and FuncSzSigned fields are NULL.  For functions
     // that operate on signed values, the FuncLlcUnsigned and
     // FuncSzUnsigned fields are NULL.
     const char *Name;
     FuncTypeUnsigned FuncLlcUnsigned;
     FuncTypeUnsigned FuncSzUnsigned;
     FuncTypeSigned FuncLlcSigned;
     FuncTypeSigned FuncSzSigned;
     bool ExcludeDivExceptions; // for divide related tests
   } Funcs[] = {
-#define X(inst, op, isdiv)                                                     \
+#define X(inst, op, isdiv, isshift)                                            \
   { STR(inst), test##inst, Subzero_::test##inst, NULL, NULL, isdiv }           \
   ,
       UINTOP_TABLE
 #undef X
-#define X(inst, op, isdiv)                                                     \
+#define X(inst, op, isdiv, isshift)                                            \
   { STR(inst), NULL, NULL, test##inst, Subzero_::test##inst, isdiv }           \
   ,
       SINTOP_TABLE
 #undef X
   };
   const static size_t NumFuncs = sizeof(Funcs) / sizeof(*Funcs);
 
   if (sizeof(TypeUnsigned) <= sizeof(uint32_t)) {
     // This is the "normal" version of the loop nest, for 32-bit or
     // narrower types.
@@ skipping 85 matching lines @@
     // For functions that operate on unsigned values, the
     // FuncLlcSigned and FuncSzSigned fields are NULL.  For functions
     // that operate on signed values, the FuncLlcUnsigned and
     // FuncSzUnsigned fields are NULL.
     const char *Name;
     FuncTypeUnsigned FuncLlcUnsigned;
     FuncTypeUnsigned FuncSzUnsigned;
     FuncTypeSigned FuncLlcSigned;
     FuncTypeSigned FuncSzSigned;
     bool ExcludeDivExceptions; // for divide related tests
+    bool MaskShiftOperations;  // for shift related tests
   } Funcs[] = {
-#define X(inst, op, isdiv)                                                     \
+#define X(inst, op, isdiv, isshift)                                            \
   {                                                                            \
-    STR(inst), test##inst, Subzero_::test##inst, NULL, NULL, isdiv             \
+    STR(inst), test##inst, Subzero_::test##inst, NULL, NULL, isdiv, isshift    \
   }                                                                            \
   ,
         UINTOP_TABLE
 #undef X
-#define X(inst, op, isdiv)                                                     \
+#define X(inst, op, isdiv, isshift)                                            \
   {                                                                            \
-    STR(inst), NULL, NULL, test##inst, Subzero_::test##inst, isdiv             \
+    STR(inst), NULL, NULL, test##inst, Subzero_::test##inst, isdiv, isshift    \
   }                                                                            \
   ,
         SINTOP_TABLE
 #undef X
   };
   const static size_t NumFuncs = sizeof(Funcs) / sizeof(*Funcs);
   const static size_t NumElementsInType = Vectors<TypeUnsigned>::NumElements;
   for (size_t f = 0; f < NumFuncs; ++f) {
     PRNG Index;
     for (size_t i = 0; i < MaxTestsPerFunc; ++i) {
       // Initialize the test vectors.
       TypeUnsigned Value1, Value2;
       for (size_t j = 0; j < NumElementsInType;) {
         ElementTypeUnsigned Element1 = Values[Index() % NumValues];
         ElementTypeUnsigned Element2 = Values[Index() % NumValues];
         if (Funcs[f].ExcludeDivExceptions &&
             inputsMayTriggerException<ElementTypeSigned>(Element1, Element2))
           continue;
+        if (Funcs[f].MaskShiftOperations)
+          Element2 &= CHAR_BIT * sizeof(ElementTypeUnsigned) - 1;
         Value1[j] = Element1;
         Value2[j] = Element2;
         ++j;
       }
       // Perform the test.
       TypeUnsigned ResultSz, ResultLlc;
       ++TotalTests;
       if (Funcs[f].FuncSzUnsigned) {
         ResultSz = Funcs[f].FuncSzUnsigned(Value1, Value2);
         ResultLlc = Funcs[f].FuncLlcUnsigned(Value1, Value2);
@@ skipping 139 matching lines @@
   testsVecInt<v16ui8, v16si8>(TotalTests, Passes, Failures);
   testsFp<float>(TotalTests, Passes, Failures);
   testsFp<double>(TotalTests, Passes, Failures);
   testsVecFp(TotalTests, Passes, Failures);
 
   std::cout << "TotalTests=" << TotalTests << " Passes=" << Passes
             << " Failures=" << Failures << "\n";
   return Failures;
 }
 
-extern "C" {
-// Subzero helpers
-  v4si32 Sz_shl_v4i32(v4si32 a, v4si32 b) { return a << b; }
-  v4si32 Sz_ashr_v4i32(v4si32 a, v4si32 b) { return a >> b; }
-  v4ui32 Sz_lshr_v4i32(v4ui32 a, v4ui32 b) { return a >> b; }
-  v4si32 Sz_sdiv_v4i32(v4si32 a, v4si32 b) { return a / b; }
-  v4ui32 Sz_udiv_v4i32(v4ui32 a, v4ui32 b) { return a / b; }
-  v4si32 Sz_srem_v4i32(v4si32 a, v4si32 b) { return a % b; }
-  v4ui32 Sz_urem_v4i32(v4ui32 a, v4ui32 b) { return a % b; }
-
-  v8si16 Sz_shl_v8i16(v8si16 a, v8si16 b) { return a << b; }
-  v8si16 Sz_ashr_v8i16(v8si16 a, v8si16 b) { return a >> b; }
-  v8ui16 Sz_lshr_v8i16(v8ui16 a, v8ui16 b) { return a >> b; }
-  v8si16 Sz_sdiv_v8i16(v8si16 a, v8si16 b) { return a / b; }
-  v8ui16 Sz_udiv_v8i16(v8ui16 a, v8ui16 b) { return a / b; }
-  v8si16 Sz_srem_v8i16(v8si16 a, v8si16 b) { return a % b; }
-  v8ui16 Sz_urem_v8i16(v8ui16 a, v8ui16 b) { return a % b; }
-
-  v16ui8 Sz_mul_v16i8(v16ui8 a, v16ui8 b) { return a * b; }
-  v16si8 Sz_shl_v16i8(v16si8 a, v16si8 b) { return a << b; }
-  v16si8 Sz_ashr_v16i8(v16si8 a, v16si8 b) { return a >> b; }
-  v16ui8 Sz_lshr_v16i8(v16ui8 a, v16ui8 b) { return a >> b; }
-  v16si8 Sz_sdiv_v16i8(v16si8 a, v16si8 b) { return a / b; }
-  v16ui8 Sz_udiv_v16i8(v16ui8 a, v16ui8 b) { return a / b; }
-  v16si8 Sz_srem_v16i8(v16si8 a, v16si8 b) { return a % b; }
-  v16ui8 Sz_urem_v16i8(v16ui8 a, v16ui8 b) { return a % b; }
-
-  v4f32 Sz_frem_v4f32(v4f32 a, v4f32 b) {
-    v4f32 Result;
-    for (int i = 0; i < 4; ++i)
-      Result[i] = fmodf(a[i], b[i]);
-    return Result;
-  }
-}