Subzero. Native 64-bit int arithmetic on x86-64.

crosstest/mem_intrin.h

Index: crosstest/mem_intrin.h
diff --git a/crosstest/mem_intrin.h b/crosstest/mem_intrin.h
index 70f02ae7394da5292736e3fc44daf410239d5185..f04e1b2c5662be2eb21f059b25472a201eb4ddc6 100644
--- a/crosstest/mem_intrin.h
+++ b/crosstest/mem_intrin.h
@@ -4,10 +4,11 @@
  * There is no include guard since this will be included multiple times,
  * under different namespaces.
  */
+#include "xdefs.h"
 
-int memcpy_test(uint8_t *buf, uint8_t *buf2, uint8_t init, size_t length);
-int memmove_test(uint8_t *buf, uint8_t *buf2, uint8_t init, size_t length);
-int memset_test(uint8_t *buf, uint8_t *buf2, uint8_t init, size_t length);
+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);