Inline memove for small constant sizes and refactor memcpy and memset.

crosstest/mem_intrin_main.cpp

 /* crosstest.py --test=mem_intrin.cpp --driver=mem_intrin_main.cpp \
    --prefix=Subzero_ --output=mem_intrin */
 
 #include <stdint.h> /* cstdint requires -std=c++0x or higher */
 #include <cstdio>
 
 #include "mem_intrin.h"
 namespace Subzero_ {
 #include "mem_intrin.h"
 }
 
 #define XSTR(s) STR(s)
 #define STR(s) #s
 
-void testFixedLen(size_t &TotalTests, size_t &Passes, size_t &Failures) {
-#define do_test_fixed(test_func)                                               \
-  for (uint8_t init_val = 0; init_val < 100; ++init_val) {                     \
-    ++TotalTests;                                                              \
-    int llc_result = test_func(init_val);                                      \
-    int sz_result = Subzero_::test_func(init_val);                             \
-    if (llc_result == sz_result) {                                             \
-      ++Passes;                                                                \
-    } else {                                                                   \
-      ++Failures;                                                              \
-      printf("Failure (%s): init_val=%d, llc=%d, sz=%d\n", STR(test_func),     \
-             init_val, llc_result, sz_result);                                 \
-    }                                                                          \
-  }
-
-  do_test_fixed(memcpy_test_fixed_len);
-  do_test_fixed(memmove_test_fixed_len);
-  do_test_fixed(memset_test_fixed_len)
-#undef do_test_fixed
-}
-
 void testVariableLen(size_t &TotalTests, size_t &Passes, size_t &Failures) {
   uint8_t buf[256];
   uint8_t buf2[256];
 #define do_test_variable(test_func)                                            \
   for (size_t len = 4; len < 128; ++len) {                                     \
     for (uint8_t init_val = 0; init_val < 100; ++init_val) {                   \
       ++TotalTests;                                                            \
       int llc_result = test_func(buf, buf2, init_val, len);                    \
       int sz_result = Subzero_::test_func(buf, buf2, init_val, len);           \
       if (llc_result == sz_result) {                                           \
         ++Passes;                                                              \
       } else {                                                                 \
         ++Failures;                                                            \
         printf("Failure (%s): init_val=%d, len=%d, llc=%d, sz=%d\n",           \
                STR(test_func), init_val, len, llc_result, sz_result);          \
       }                                                                        \
     }                                                                          \
   }
 
   do_test_variable(memcpy_test);
   do_test_variable(memmove_test);
   do_test_variable(memset_test)
 #undef do_test_variable
 }
 
+void testFixedLen(size_t &TotalTests, size_t &Passes, size_t &Failures) {
+#define do_test_fixed(test_func, NBYTES)                                       \
+  for (uint8_t init_val = 0; init_val < 100; ++init_val) {                     \
+    ++TotalTests;                                                              \
+    int llc_result = test_func##_##NBYTES(init_val);                           \
+    int sz_result = Subzero_::test_func##_##NBYTES(init_val);                  \
+    if (llc_result == sz_result) {                                             \
+      ++Passes;                                                                \
+    } else {                                                                   \
+      ++Failures;                                                              \
+      printf("Failure (%s): init_val=%d, len=%d, llc=%d, sz=%d\n",             \
+             STR(test_func), init_val, NBYTES, llc_result, sz_result);         \
+    }                                                                          \
+  }
+
+#define X(NBYTES)                                                              \
+  do_test_fixed(memcpy_test_fixed_len, NBYTES);                                \
+  do_test_fixed(memmove_test_fixed_len, NBYTES);                               \
+  do_test_fixed(memset_test_fixed_len, NBYTES);
+  VALUES
+#undef X
+#undef do_test_fixed
+}
+
 int main(int argc, char **argv) {
   unsigned TotalTests = 0;
   unsigned Passes = 0;
   unsigned Failures = 0;
   testFixedLen(TotalTests, Passes, Failures);
   testVariableLen(TotalTests, Passes, Failures);
   printf("TotalTests=%u Passes=%u Failures=%u\n", TotalTests, Passes, Failures);
   return Failures;
 }