i386.md (iptrsize): New mode attribute.

	* config/i386/i386.md (iptrsize): New mode attribute.
	(tp_seg): Ditto.
	(*load_tp_<mode>): Macroize insn from *load_tp_{si,di} using P
	mode iterator.
	(*add_tp_<mode>): Ditto from *add_tp_{si,di}.
	(stack_protect_set_<mode>): Ditto from stack_protect_set_{si,di}.
	(stack_protect_test_<mode>): Ditto from stack_protect_test_{si,di}.
	(stack_tls_protect_set_<mode>): Ditto from
	stack_tls_protect_set_{si,di}.  Use %@ to output segment register
	of thread base pointer load.
	(stack_tls_protect_test_<mode>): Ditto from
	stack_tls_protect_test_{si,di}.  Use %@ to output segment register
	of thread base pointer load.
	(stack_protect_set): Rewrite using indirect functions.
	(stack_protect_test): Ditto.
	* config/i386/i386.c (ix86_print_operand_punct_valid): Add '@'.
	(ix86_print_operand): Handle '@'.

From-SVN: r163900

gcc/ChangeLog

+2010-09-06  Uros Bizjak  <ubizjak@gmail.com>
+
+	* config/i386/i386.md (iptrsize): New mode attribute.
+	(tp_seg): Ditto.
+	(*load_tp_<mode>): Macroize insn from *load_tp_{si,di} using P
+	mode iterator.
+	(*add_tp_<mode>): Ditto from *add_tp_{si,di}.
+	(stack_protect_set_<mode>): Ditto from stack_protect_set_{si,di}.
+	(stack_protect_test_<mode>): Ditto from stack_protect_test_{si,di}.
+	(stack_tls_protect_set_<mode>): Ditto from
+	stack_tls_protect_set_{si,di}.  Use %@ to output segment register
+	of thread base pointer load.
+	(stack_tls_protect_test_<mode>): Ditto from
+	stack_tls_protect_test_{si,di}.  Use %@ to output segment register
+	of thread base pointer load.
+	(stack_protect_set): Rewrite using indirect functions.
+	(stack_protect_test): Ditto.
+	* config/i386/i386.c (ix86_print_operand_punct_valid): Add '@'.
+	(ix86_print_operand): Handle '@'.
+
 2010-09-05  Giuseppe Scrivano  <gscrivano@gnu.org>
 
 	* tree-tailcall.c (process_assignment): Handle NEGATE_EXPR and

gcc/config/i386/i386.c

@@ -12404,6 +12404,7 @@ get_some_local_dynamic_name (void)
    Y -- print condition for XOP pcom* instruction.
    + -- print a branch hint as 'cs' or 'ds' prefix
    ; -- print a semicolon (after prefixes due to bug in older gas).
+   @ -- print a segment register of thread base pointer load
  */
 
 void
@@ -12882,6 +12883,19 @@ ix86_print_operand (FILE *file, rtx x, int code)
 #endif
 	  return;
 
+	case '@':
+	  if (ASSEMBLER_DIALECT == ASM_ATT)
+	    putc ('%', file);
+
+	  /* The kernel uses a different segment register for performance
+	     reasons; a system call would not have to trash the userspace
+	     segment register, which would be expensive.  */
+	  if (TARGET_64BIT && ix86_cmodel != CM_KERNEL)
+	    fputs ("fs", file);
+	  else
+	    fputs ("gs", file);
+	  return;
+
 	default:
 	    output_operand_lossage ("invalid operand code '%c'", code);
 	}
@@ -13012,7 +13026,8 @@ ix86_print_operand (FILE *file, rtx x, int code)
 static bool
 ix86_print_operand_punct_valid_p (unsigned char code)
 {
-  return (code == '*' || code == '+' || code == '&' || code == ';');
+  return (code == '@' || code == '*' || code == '+'
+	  || code == '&' || code == ';');
 }
 
 /* Print a memory operand whose address is ADDR.  */