--- gforth/Attic/386.h	1994/12/12 17:10:27	1.7
+++ gforth/Attic/386.h	1995/10/11 19:39:31	1.9
@@ -14,6 +14,11 @@
    parallelism (no pipelining or too few registers) */
 #define CISC_NEXT
 
+/* 386 and below have no cache, 486 has a shared cache, and the
+   Pentium probably employs hardware cache consistency, so
+   flush-icache is a noop */
+#define FLUSH_ICACHE(addr,size) 0
+
 #ifdef DIRECT_THREADED
 /* PFA gives the parameter field address corresponding to a cfa */
 #define PFA(cfa)	(((Cell *)cfa)+2)
@@ -43,6 +48,9 @@
 #endif
 
 #ifdef FORCE_REG
+#if (__GNUC__==2 && defined(__GNUC_MINOR__) && __GNUC_MINOR__==5)
+/* i.e. gcc-2.5.x */
+/* this works with 2.5.7; nothing works with 2.5.8 */
 #define IPREG asm("%esi")
 #define SPREG asm("%edi")
 #ifdef USE_TOS
@@ -50,4 +58,9 @@
 #else
 #define CFAREG asm("%edx")
 #endif
+#else /* gcc-version */
+/* this works with 2.6.3 (and quite well, too) */
+/* since this is not very demanding, it's the default for other gcc versions */
+#define SPREG asm("%ebx")
+#endif /* gcc-version */
 #endif /* FORCE_REG */