--- gforth/arch/alpha/machine.h	1998/12/08 22:02:54	1.3
+++ gforth/arch/alpha/machine.h	2000/09/23 15:47:02	1.9
@@ -1,6 +1,6 @@
-/* preliminary machine file for DEC Alpha
+/* DEC Alpha
 
-  Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
+  Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
 
   This file is part of Gforth.
 
@@ -16,11 +16,14 @@
 
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
-  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 */
 
 /* Be careful: long long on Alpha are 64 bit :-(( */
-#define LONG_LATENCY
+
+#ifndef THREADING_SCHEME
+#define THREADING_SCHEME 5
+#endif
 
 #if !defined(USE_TOS) && !defined(USE_NO_TOS)
 #define USE_TOS
@@ -97,7 +100,10 @@ typedef short Int16;
    code gcc produces for the cpu_dep routine.
 */
 
-#define CPU_DEP2	register Label _alpha_docol asm("$9")=&&docol; \
+/* if you change this, also change _DOCOL_LABEL below */
+#define DO_BASE		(&&docol)
+
+#define CPU_DEP2	register Label _alpha_docol asm("$9")=DO_BASE; \
 			register Label _alpha_ca;
 
 #define CPU_DEP3	cpu_dep: asm("lda %0, 500(%1)":"=r"(_alpha_ca):"r"(_alpha_docol)); goto *_alpha_ca;
@@ -106,31 +112,35 @@ typedef short Int16;
 
 
 /* CODE_ADDRESS is the address of the code jumped to through the code field */
-#define CODE_ADDRESS(wa)	({Int32 *_wa=(Int32 *)(wa); \
-				    (_wa[0]&0xfc000000)==0x68000000 ? /*JMP?*/\
-				    &&docol : \
-				    &&docol+((Int16 *)_wa)[0]; })
+#define CODE_ADDRESS(wa) ({ \
+	Int32 *_wa=(Int32 *)(wa); \
+	(_wa[0]&0xfc000000)==0x68000000 ? /*JMP?*/\
+	 DO_BASE : \
+	 ((((_wa[0]^((Int32 *)_CPU_DEP_LABEL)[0]) & 0xffff0000)==0 && \
+	   ((_wa[1]^((Int32 *)_CPU_DEP_LABEL)[1]) & 0xffffc000)==0 ) ? \
+	  (DO_BASE+((Int16 *)_wa)[0]) : \
+	  (Label)_wa); })
 
 #define _CPU_DEP_LABEL	(symbols[DOESJUMP])
 #define _DOCOL_LABEL	(symbols[DOCOL])
 
 /* MAKE_CF creates an appropriate code field at the wa; ca is the code
    address. For the Alpha, this is a lda followed by a jmp (or just a
-   jmp, if ca==&&docol).  We patch the jmp with a good hint (on the
+   jmp, if ca==DO_BASE).  We patch the jmp with a good hint (on the
    21064A this saves 5 cycles!) */
 #define MAKE_CF(wa,ca)	({ \
-			     Int32 *_wa=(Int32 *)(wa); \
-			     Label _ca=(Label)(ca); \
-			     if (_ca==_DOCOL_LABEL)  \
-			       _wa[0]=(((0x1a<<26)|(31<<21)|(9<<16))| \
-				       (((((Cell)_ca)-((Cell)_wa)-4) & 0xffff)>>2)); \
-			     else { \
-			       _wa[0]=((((Int32 *)_CPU_DEP_LABEL)[0] & 0xffff0000)| \
-				       ((((Cell)_ca)-((Cell)_DOCOL_LABEL)) & 0xffff)); \
-			       _wa[1]=((((Int32 *)_CPU_DEP_LABEL)[1] & 0xffffc000)| \
-				       (((((Cell)_ca)-((Cell)_wa)-8) & 0xffff)>>2));  \
-			     } \
-			})
+	Int32 *_wa=(Int32 *)(wa); \
+	Label _ca=(Label)(ca); \
+	if (_ca==_DOCOL_LABEL)  \
+	    _wa[0]=(((0x1a<<26)|(31<<21)|(9<<16))| \
+	            (((((Cell)_ca)-((Cell)_wa)-4) & 0xffff)>>2)); \
+	else { \
+	    _wa[0]=((((Int32 *)_CPU_DEP_LABEL)[0] & 0xffff0000)| \
+		    ((((Cell)_ca)-((Cell)_DOCOL_LABEL)) & 0xffff)); \
+	    _wa[1]=((((Int32 *)_CPU_DEP_LABEL)[1] & 0xffffc000)| \
+		    (((((Cell)_ca)-((Cell)_wa)-8) & 0xffff)>>2));  \
+	} \
+    })
 
 /* this is the point where the does code for the word with the xt cfa
    starts. Because the jump to the code field takes only one cell on
@@ -139,7 +149,7 @@ typedef short Int16;
 #define DOES_CODE(cfa) \
      ({ Int32 *_wa=(cfa); \
 	(_wa[0] == ((((Int32 *)_CPU_DEP_LABEL)[0] & 0xffff0000)| \
-		    ((((Cell)&&dodoes)-((Cell)&&docol)) & 0xffff)) && \
+		    ((((Cell)&&dodoes)-((Cell)DO_BASE)) & 0xffff)) && \
 	 (_wa[1]&0xffffc000) == (((Int32 *)_CPU_DEP_LABEL)[1] & 0xffffc000)) \
 	? DOES_CODE1(_wa) : 0; })
 
@@ -149,7 +159,7 @@ typedef short Int16;
 /* the does handler resides between DOES> and the following Forth
    code. Since the code-field jumps directly to dodoes, the
    does-handler is not needed for the Alpha architecture */
-#define MAKE_DOES_HANDLER(addr)   0
+#define MAKE_DOES_HANDLER(addr)   ((void)0)
 
 /* This makes a code field for a does-defined word. doesp is the
    address of the does-code. On the Alpha, the code field consists of
@@ -159,3 +169,13 @@ typedef short Int16;
 				    _cfa[1] = (doesp); })
 #endif
 
+#ifdef FORCE_REG
+/* $9-$14 are callee-saved, $1-$8 and $22-$25 are caller-saved */
+#define IPREG asm("$10")
+#define SPREG asm("$11")
+#define RPREG asm("$12")
+#define LPREG asm("$13")
+#define TOSREG asm("$14")
+/* #define CFAREG asm("$22") egcs-1.0.3 crashes with any caller-saved
+   register decl */
+#endif /* FORCE_REG */