cmd/8a: support XMM registers.

R=rsc, golang-dev
CC=golang-dev
https://golang.org/cl/6884046

src/cmd/8a/a.y

@@ -55,7 +55,7 @@
 %token	<lval>	LTYPE0 LTYPE1 LTYPE2 LTYPE3 LTYPE4
 %token	<lval>	LTYPEC LTYPED LTYPEN LTYPER LTYPET LTYPES LTYPEM LTYPEI LTYPEG LTYPEXC
 %token	<lval>	LCONST LFP LPC LSB
-%token	<lval>	LBREG LLREG LSREG LFREG
+%token	<lval>	LBREG LLREG LSREG LFREG LXREG
 %token	<dval>	LFCONST
 %token	<sval>	LSCONST LSP
 %token	<sym>	LNAME LLAB LVAR
@@ -359,6 +359,11 @@ reg:
 		$$ = nullgen;
 		$$.type = $1;
 	}
+|	LXREG
+	{
+		$$ = nullgen;
+		$$.type = $1;
+	}
 |	LSP
 	{
 		$$ = nullgen;

src/cmd/8a/lex.c

@@ -210,6 +210,15 @@ struct
 	"F6",		LFREG,	D_F0+6,
 	"F7",		LFREG,	D_F0+7,
 
+	"X0",		LXREG,	D_X0+0,
+	"X1",		LXREG,	D_X0+1,
+	"X2",		LXREG,	D_X0+2,
+	"X3",		LXREG,	D_X0+3,
+	"X4",		LXREG,	D_X0+4,
+	"X5",		LXREG,	D_X0+5,
+	"X6",		LXREG,	D_X0+6,
+	"X7",		LXREG,	D_X0+7,
+
 	"CS",		LSREG,	D_CS,
 	"SS",		LSREG,	D_SS,
 	"DS",		LSREG,	D_DS,

src/cmd/8a/y.tab.h

+/* A Bison parser, made by GNU Bison 2.6.5.  */
 
-/* A Bison parser, made by GNU Bison 2.4.1.  */
-
-/* Skeleton interface for Bison's Yacc-like parsers in C
+/* Bison interface for Yacc-like parsers in C
    
-      Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
-   Free Software Foundation, Inc.
+      Copyright (C) 1984, 1989-1990, 2000-2012 Free Software Foundation, Inc.
    
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -32,6 +30,15 @@
    This special exception was added by the Free Software Foundation in
    version 2.2 of Bison.  */
 
+#ifndef YY_YY_Y_TAB_H_INCLUDED
+# define YY_YY_Y_TAB_H_INCLUDED
+/* Enabling traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG 0
+#endif
+#if YYDEBUG
+extern int yydebug;
+#endif
 
 /* Tokens.  */
 #ifndef YYTOKENTYPE
@@ -62,12 +69,13 @@
      LLREG = 278,
      LSREG = 279,
      LFREG = 280,
-     LFCONST = 281,
-     LSCONST = 282,
-     LSP = 283,
-     LNAME = 284,
-     LLAB = 285,
-     LVAR = 286
+     LXREG = 281,
+     LFCONST = 282,
+     LSCONST = 283,
+     LSP = 284,
+     LNAME = 285,
+     LLAB = 286,
+     LVAR = 287
    };
 #endif
 /* Tokens.  */
@@ -94,21 +102,20 @@
 #define LLREG 278
 #define LSREG 279
 #define LFREG 280
-#define LFCONST 281
-#define LSCONST 282
-#define LSP 283
-#define LNAME 284
-#define LLAB 285
-#define LVAR 286
-
+#define LXREG 281
+#define LFCONST 282
+#define LSCONST 283
+#define LSP 284
+#define LNAME 285
+#define LLAB 286
+#define LVAR 287
 
 
 
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 typedef union YYSTYPE
 {
-
-/* Line 1676 of yacc.c  */
+/* Line 2042 of yacc.c  */
 #line 37 "a.y"
 
 	Sym	*sym;
@@ -123,9 +130,8 @@ typedef union YYSTYPE
 	Gen2	gen2;
 
 
-
-/* Line 1676 of yacc.c  */
-#line 129 "y.tab.h"
+/* Line 2042 of yacc.c  */
+#line 135 "y.tab.h"
 } YYSTYPE;
 # define YYSTYPE_IS_TRIVIAL 1
 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
@@ -134,4 +140,18 @@ typedef union YYSTYPE
 
 extern YYSTYPE yylval;
 
+#ifdef YYPARSE_PARAM
+#if defined __STDC__ || defined __cplusplus
+int yyparse (void *YYPARSE_PARAM);
+#else
+int yyparse ();
+#endif
+#else /* ! YYPARSE_PARAM */
+#if defined __STDC__ || defined __cplusplus
+int yyparse (void);
+#else
+int yyparse ();
+#endif
+#endif /* ! YYPARSE_PARAM */
 
+#endif /* !YY_YY_Y_TAB_H_INCLUDED  */