+static inline int
+lowtag_of(lispobj obj)
+{
+ return obj & LOWTAG_MASK;
+}
+
+static inline int
+widetag_of(lispobj obj)
+{
+ return obj & WIDETAG_MASK;
+}
+
+static inline unsigned long
+HeaderValue(lispobj obj)
+{
+ return obj >> N_WIDETAG_BITS;
+}
+
+static inline struct cons *
+CONS(lispobj obj)
+{
+ return (struct cons *)(obj - LIST_POINTER_LOWTAG);
+}
+
+static inline struct symbol *
+SYMBOL(lispobj obj)
+{
+ return (struct symbol *)(obj - OTHER_POINTER_LOWTAG);
+}
+
+static inline struct fdefn *
+FDEFN(lispobj obj)
+{
+ return (struct fdefn *)(obj - OTHER_POINTER_LOWTAG);
+}
+
+/* Is the Lisp object obj something with pointer nature (as opposed to
+ * e.g. a fixnum or character or unbound marker)? */
+static inline int
+is_lisp_pointer(lispobj obj)
+{
+ return obj & 1;
+}
+
+#include "fixnump.h"
+
+/* Is the Lisp object obj something with immediate nature (e.g. a
+ * fixnum or character or unbound marker)? */
+static inline int
+is_lisp_immediate(lispobj obj)
+{
+ return (fixnump(obj)
+ || (widetag_of(obj) == CHARACTER_WIDETAG)
+#if N_WORD_BITS == 64
+ || (widetag_of(obj) == SINGLE_FLOAT_WIDETAG)
+#endif
+ || (widetag_of(obj) == UNBOUND_MARKER_WIDETAG));
+}
+
+/* Convert from a lispobj with type bits to a native (ordinary
+ * C/assembly) pointer to the beginning of the object. */
+static inline lispobj *
+native_pointer(lispobj obj)
+{
+ return (lispobj *) ((pointer_sized_uint_t) (obj & ~LOWTAG_MASK));
+}
+
+/* inverse operation: create a suitably tagged lispobj from a native
+ * pointer or integer.*/
+static inline lispobj
+make_lispobj(void *o, int low_tag)
+{
+ return LOW_WORD(o) | low_tag;
+}
+
+static inline lispobj
+make_fixnum(long n)
+{
+ return n << N_FIXNUM_TAG_BITS;
+}
+
+static inline long
+fixnum_value(lispobj n)
+{
+ return n >> N_FIXNUM_TAG_BITS;
+}
+
+#if defined(LISP_FEATURE_WIN32)
+/* KLUDGE: Avoid double definition of boolean by rpcndr.h included via
+ * shlobj.h.
+ *
+ * FIXME: We should probably arrange to use the rpcndr.h boolean on Windows,
+ * or get rid of our own boolean type. If the boolean type is only used in
+ * the runtime, and never passed to Lisp, then it doesn't matter which one
+ * we use.
+ */
+#define boolean rpcndr_boolean
+#include <shlobj.h>
+#undef boolean
+#endif
+typedef int boolean;