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diff --git a/kernel/byterun/int64_native.h b/kernel/byterun/int64_native.h
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+++ b/kernel/byterun/int64_native.h
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+/***********************************************************************/
+/*                                                                     */
+/*                           Objective Caml                            */
+/*                                                                     */
+/*            Xavier Leroy, projet Cristal, INRIA Rocquencourt         */
+/*                                                                     */
+/*  Copyright 2002 Institut National de Recherche en Informatique et   */
+/*  en Automatique.  All rights reserved.  This file is distributed    */
+/*  under the terms of the GNU Library General Public License, with    */
+/*  the special exception on linking described in file ../LICENSE.     */
+/*                                                                     */
+/***********************************************************************/
+
+/* $Id: int64_native.h 10739 2008-04-01 14:45:20Z herbelin $ */
+
+/* Wrapper macros around native 64-bit integer arithmetic,
+   so that it has the same interface as the software emulation
+   provided in int64_emul.h */
+
+#ifndef CAML_INT64_NATIVE_H
+#define CAML_INT64_NATIVE_H
+
+#define I64_literal(hi,lo) ((int64)(hi) << 32 | (lo))
+#define I64_compare(x,y) (((x) > (y)) - ((x) < (y)))
+#define I64_ult(x,y) ((uint64)(x) < (uint64)(y))
+#define I64_neg(x) (-(x))
+#define I64_add(x,y) ((x) + (y))
+#define I64_sub(x,y) ((x) - (y))
+#define I64_mul(x,y) ((x) * (y))
+#define I64_is_zero(x) ((x) == 0)
+#define I64_is_negative(x) ((x) < 0)
+#define I64_div(x,y) ((x) / (y))
+#define I64_mod(x,y) ((x) % (y))
+#define I64_udivmod(x,y,quo,rem) \
+  (*(rem) = (uint64)(x) % (uint64)(y), \
+   *(quo) = (uint64)(x) / (uint64)(y))
+#define I64_and(x,y) ((x) & (y))
+#define I64_or(x,y) ((x) | (y))
+#define I64_xor(x,y) ((x) ^ (y))
+#define I64_lsl(x,y) ((x) << (y))
+#define I64_asr(x,y) ((x) >> (y))
+#define I64_lsr(x,y) ((uint64)(x) >> (y))
+#define I64_to_intnat(x) ((intnat) (x))
+#define I64_of_intnat(x) ((intnat) (x))
+#define I64_to_int32(x) ((int32) (x))
+#define I64_of_int32(x) ((int64) (x))
+#define I64_to_double(x) ((double)(x))
+#define I64_of_double(x) ((int64)(x))
+
+#endif /* CAML_INT64_NATIVE_H */