Lower bitmanip intrinsics, assuming absence of BMI/SSE4.2 for now.

crosstest/test_bitmanip_main.cpp

+//===- subzero/crosstest/test_bitmanip_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 cross testing bit manipulation intrinsics.
+//
+//===----------------------------------------------------------------------===//
+
+/* crosstest.py --test=test_bitmanip.cpp --test=test_bitmanip_intrin.ll \
+   --driver=test_bitmanip_main.cpp --prefix=Subzero_ --output=test_bitmanip */
+
+#include <stdint.h>
+
+#include <climits>
+#include <iostream>
+
+// Include test_bitmanip.h twice - once normally, and once within the
+// Subzero_ namespace, corresponding to the llc and Subzero translated
+// object files, respectively.
+#include "test_bitmanip.h"
+namespace Subzero_ {
+#include "test_bitmanip.h"
+}
+
+volatile uint64_t Values[] = {
+    0,                    1,                    0x7e,
+    0x7f,                 0x80,                 0x81,
+    0xfe,                 0xff,                 0x7ffe,
+    0x7fff,               0x8000,               0x8001,
+    0xfffe,               0xffff,
+    0x007fffff /*Max subnormal + */,
+    0x00800000 /*Min+ */, 0x7f7fffff /*Max+ */,
+    0x7f800000 /*+Inf*/,  0xff800000 /*-Inf*/,
+    0x7fa00000 /*SNaN*/,  0x7fc00000 /*QNaN*/,
+    0x7ffffffe,           0x7fffffff,           0x80000000,
+    0x80000001,           0xfffffffe,           0xffffffff,
+    0x100000000ll,        0x100000001ll,
+    0x000fffffffffffffll /*Max subnormal + */,
+    0x0010000000000000ll /*Min+ */,
+    0x7fefffffffffffffll /*Max+ */,
+    0x7ff0000000000000ll /*+Inf*/,
+    0xfff0000000000000ll /*-Inf*/,
+    0x7ff0000000000001ll /*SNaN*/,
+    0x7ff8000000000000ll /*QNaN*/,
+    0x7ffffffffffffffell, 0x7fffffffffffffffll, 0x8000000000000000ll,
+    0x8000000000000001ll, 0xfffffffffffffffell, 0xffffffffffffffffll };
+
+const static size_t NumValues = sizeof(Values) / sizeof(*Values);
+
+template <typename Type>
+void testBitManip(size_t &TotalTests, size_t &Passes, size_t &Failures) {
+  typedef Type (*FuncType)(Type);
+  static struct {
+    const char *Name;
+    FuncType FuncLlc;
+    FuncType FuncSz;
+  } Funcs[] = {
+#define X(inst)                                                             \
+  {                                                                         \
+    STR(inst), test_##inst, Subzero_::test_##inst                           \
+  },                                                                        \
+  {                                                                         \
+    STR(inst) "_alloca", test_alloca_##inst, Subzero_::test_alloca_##inst   \
+  },                                                                        \
+  {                                                                         \
+    STR(inst) "_const", test_const_##inst, Subzero_::test_const_##inst      \
+  },
+      BMI_OPS
+#undef X
+  };
+  const static size_t NumFuncs = sizeof(Funcs) / sizeof(*Funcs);
+
+  for (size_t f = 0; f < NumFuncs; ++f) {
+    for (size_t i = 0; i < NumValues; ++i) {
+      Type Value = static_cast<Type>(Values[i]);
+      ++TotalTests;
+      Type ResultSz = Funcs[f].FuncSz(Value);
+      Type ResultLlc = Funcs[f].FuncLlc(Value);
+      if (ResultSz == ResultLlc) {
+        ++Passes;
+      } else {
+        ++Failures;
+        std::cout << "test_" << Funcs[f].Name
+                  << (CHAR_BIT * sizeof(Type)) << "("
+                  << static_cast<uint64_t>(Value)
+                  << "): sz=" << static_cast<uint64_t>(ResultSz)
+                  << " llc=" << static_cast<uint64_t>(ResultLlc)
+                  << "\n";
+      }
+    }
+  }
+}
+
+int main(int argc, char **argv) {
+  size_t TotalTests = 0;
+  size_t Passes = 0;
+  size_t Failures = 0;
+
+  testBitManip<uint32_t>(TotalTests, Passes, Failures);
+  testBitManip<uint64_t>(TotalTests, Passes, Failures);
+
+  std::cout << "TotalTests=" << TotalTests << " Passes=" << Passes
+            << " Failures=" << Failures << "\n";
+  return Failures;
+}