Significantly enhanced checks for CPU type and floating point format

supported.

c/src/librpc/src/xdr/xdr_float.c

@@ -54,16 +54,27 @@ static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr_float.c,v 1.7 1999/08/28 00
  * This routine works on machines with IEEE754 FP and Vaxen.
  */
 
-#if defined(__m68k__) || defined(__sparc__) || defined(__i386__) || \
-    defined(__mips__) || defined(__ns32k__) || defined(__alpha__) || \
-    defined(__arm32__) || defined(__ppc__) || defined(__m68000__)
+#if defined(__alpha__) || \
+    defined(__arm32__) || \
+    defined(__hppa__) || \
+    defined(__i386__) || \
+    defined(__i960__) || \
+    defined(__m68k__) || defined(__mc68000__) || \
+    defined(__mips__) || \
+    defined(__ns32k__) || \
+    defined(__sparc__) || \
+    defined(__ppc__) || defined(__PPC__) || \
+    defined(__sh__)
+
 #include <machine/endian.h>
 #if !defined(IEEEFP)
 #define IEEEFP
 #endif
-#endif
 
-#ifdef vax
+#elif defined(_TMS320C3x) || defined(_TMS320C4x)
+#error "Texas Instruments C3x/C4x Not supported."
+
+#elif defined(vax)
 
 /* What IEEE single precision floating point looks like on a Vax */
 struct	ieee_single {
@@ -92,7 +103,11 @@ static struct sgl_limits {
 	{{ 0x0, 0x0, 0x0, 0x0 },	/* Min Vax */
 	{ 0x0, 0x0, 0x0 }}		/* Min IEEE */
 };
-#endif /* vax */
+/* end of vax */
+#else
+#error "xdr_float.c: unknown CPU"
+#endif
+
 
 bool_t
 xdr_float(xdrs, fp)