Implement new macro: ASM_FPRINTF_EXTENSIONS

From-SVN: r28263

gcc/ChangeLog

+Mon Jul 26 10:23:36 1999  Nick Clifton  <nickc@cygnus.com>
+
+	* final.c (asm_fprintf): Accept ASM_FPRINTF_EXTENSIONS, if
+	defined.
+
+	* tm.texi: Document ASM_FPRINTF_EXTENSIONS.
+
 Sun Jul 25 23:51:59 1999  Richard Henderson  <rth@cygnus.com>
 
 	* i860.h (EXPAND_BUILTIN_SAVEREGS): New.

gcc/final.c

@@ -3826,6 +3826,20 @@ asm_fprintf VPROTO((FILE *file, const char *p, ...))
 	    fputs (user_label_prefix, file);
 	    break;
 
+#ifdef ASM_FPRINTF_EXTENSIONS
+	    /* Upper case letters are reserved for general use by asm_fprintf
+	       and so are not available to target specific code.  In order to
+	       prevent the ASM_FPRINTF_EXTENSIONS macro from using them then,
+	       they are defined here.  As they get turned into real extensions
+	       to asm_fprintf they should be removed from this list.  */
+	  case 'A': case 'B': case 'C': case 'D': case 'E':
+	  case 'F': case 'G': case 'H': case 'J': case 'K':
+	  case 'M': case 'N': case 'P': case 'Q': case 'S':
+	  case 'T': case 'V': case 'W': case 'Y': case 'Z':
+	    break;
+	    
+	  ASM_FPRINTF_EXTENSIONS (file, argptr, p)
+#endif
 	  default:
 	    abort ();
 	  }

gcc/tm.texi

@@ -6230,6 +6230,19 @@ If defined, C string expressions to be used for the @samp{%R}, @samp{%L},
 support multiple assembler formats.  In that case, the various @file{tm.h}
 files can define these macros differently.
 
+@item ASM_FPRINTF_EXTENSIONS(@var{file}, @var{argptr}, @var{format})
+@findex ASM_FPRINTF_EXTENSIONS
+If defiend this macro should expand to a series of @code{case}
+statements which will be parsed inside the @code{switch} statement of
+the @code{asm_fprintf} function.  This allows targets to define extra
+printf formats which may useful when generating their assembler
+statements.  Noet that upper case letters are reserved for future
+generic extensions to asm_fprintf, and so are not available to target
+specific code.  The output file is given by the parameter @var{file}.
+The varargs input pointer is @var{argptr} and the rest of the format
+string, starting the character after the one that is being switched
+upon, is pointed to by @var{format}.
+
 @findex ASSEMBLER_DIALECT
 @item ASSEMBLER_DIALECT
 If your target supports multiple dialects of assembler language (such as