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

crosstest/mem_intrin.h

Index: crosstest/mem_intrin.h
diff --git a/crosstest/mem_intrin.h b/crosstest/mem_intrin.h
index f04e1b2c5662be2eb21f059b25472a201eb4ddc6..8b13fa258603ba20c8abe81d6121f1aaae1551bb 100644
--- a/crosstest/mem_intrin.h
+++ b/crosstest/mem_intrin.h
@@ -6,10 +6,15 @@
  */
 #include "xdefs.h"
 
+#include "mem_intrin.def"
+
 int memcpy_test(uint8_t *buf, uint8_t *buf2, uint8_t init, SizeT length);
 int memmove_test(uint8_t *buf, uint8_t *buf2, uint8_t init, SizeT length);
 int memset_test(uint8_t *buf, uint8_t *buf2, uint8_t init, SizeT length);
 
-int memcpy_test_fixed_len(uint8_t init);
-int memmove_test_fixed_len(uint8_t init);
-int memset_test_fixed_len(uint8_t init);
+#define X(NBYTES)                                                              \
+  int memcpy_test_fixed_len_##NBYTES(uint8_t init);                            \
+  int memmove_test_fixed_len_##NBYTES(uint8_t init);                           \
+  int memset_test_fixed_len_##NBYTES(uint8_t init);
+MEMINTRIN_SIZE_TABLE
+#undef X