0.7.4.17: Mostly Alpha fixes

[sbcl.git] / src / runtime / runtime.h

diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index 8315ea1..0e8f623 100644 (file)
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -36,43 +36,43 @@
  * problem.. */
 #define QSHOW_SIGNALS 0
 
-/* FIXME: There seems to be no reason that LowtagOf can't be defined
- * as a (possibly inline) function instead of a macro. It would also
- * be reasonable to rename the constants in ALL CAPS. */
-
-#define lowtag_Bits 3
-#define lowtag_Mask ((1<<lowtag_Bits)-1)
-#define LowtagOf(obj) ((obj)&lowtag_Mask)
-#define type_Bits 8
-#define type_Mask ((1<<type_Bits)-1)
-
-/* FIXME: There seems to be no reason that TypeOf, HeaderValue, CONS,
- * SYMBOL, and FDEFN can't be defined as (possibly inline) functions
- * instead of macros. */
+#define N_LOWTAG_BITS 3
+#define LOWTAG_MASK ((1<<N_LOWTAG_BITS)-1)
+#define N_WIDETAG_BITS 8
+#define WIDETAG_MASK ((1<<N_WIDETAG_BITS)-1)
+
+/* FIXME: Make HeaderValue, CONS, SYMBOL, and FDEFN into inline
+ * functions instead of macros. */
 
-#define TypeOf(obj) ((obj)&type_Mask)
-#define HeaderValue(obj) ((unsigned long) ((obj)>>type_Bits))
+#define HeaderValue(obj) ((unsigned long) ((obj) >> N_WIDETAG_BITS))
 
-#define CONS(obj) ((struct cons *)((obj)-type_ListPointer))
-#define SYMBOL(obj) ((struct symbol *)((obj)-type_OtherPointer))
-#define FDEFN(obj) ((struct fdefn *)((obj)-type_OtherPointer))
+#define CONS(obj) ((struct cons *)((obj)-LIST_POINTER_LOWTAG))
+#define SYMBOL(obj) ((struct symbol *)((obj)-OTHER_POINTER_LOWTAG))
+#define FDEFN(obj) ((struct fdefn *)((obj)-OTHER_POINTER_LOWTAG))
 
 /* KLUDGE: These are in theory machine-dependent and OS-dependent, but
  * in practice the "foo int" definitions work for all the machines
  * that SBCL runs on as of 0.6.7. If we port to the Alpha or some
  * other non-32-bit machine we'll probably need real machine-dependent
  * and OS-dependent definitions again. */
-#if ((defined alpha) && !(defined __linux__))
-#error No u32,s32 definitions for this platform.  Write some.
-#else
-/* int happens to be 4 bytes on linux/alpha.  long is longer. */
+/* even on alpha, int happens to be 4 bytes.  long is longer. */
 typedef unsigned int u32;
 typedef signed int s32;
 #define LOW_WORD(c) ((long)(c) & 0xFFFFFFFFL)
-#endif
+
 
 typedef u32 lispobj;
 
+static inline int
+lowtag_of(lispobj obj) {
+    return obj & LOWTAG_MASK;
+}
+
+static inline int
+widetag_of(lispobj obj) {
+    return obj & WIDETAG_MASK;
+}
+
 /* Is the Lisp object obj something with pointer nature (as opposed to
  * e.g. a fixnum or character or unbound marker)? */
 static inline int
@@ -86,7 +86,7 @@ is_lisp_pointer(lispobj obj)
 static inline lispobj
 native_pointer(lispobj obj)
 {
-    return obj & ~lowtag_Mask;
+    return obj & ~LOWTAG_MASK;
 }
 
 /* FIXME: There seems to be no reason that make_fixnum and fixnum_value
@@ -102,14 +102,14 @@ typedef int boolean;
  * instead of macros. */
 
 #define SymbolValue(sym) \
-    (((struct symbol *)((sym)-type_OtherPointer))->value)
+    (((struct symbol *)((sym)-OTHER_POINTER_LOWTAG))->value)
 #define SetSymbolValue(sym,val) \
-    (((struct symbol *)((sym)-type_OtherPointer))->value = (val))
+    (((struct symbol *)((sym)-OTHER_POINTER_LOWTAG))->value = (val))
 
 /* This only works for static symbols. */
 /* FIXME: should be called StaticSymbolFunction, right? */
 #define SymbolFunction(sym) \
-    (((struct fdefn *)(SymbolValue(sym)-type_OtherPointer))->function)
+    (((struct fdefn *)(SymbolValue(sym)-OTHER_POINTER_LOWTAG))->fun)
 
 /* KLUDGE: As far as I can tell there's no ANSI C way of saying
  * "this function never returns". This is the way that you do it