invoke.texi: Document new MIPS -mllsc and -mno-llsc options.

	* doc/invoke.texi: Document new MIPS -mllsc and -mno-llsc options.
	* doc/install.texi: Document new --with-llsc and --without-llsc
	options.
	* config.gcc: Handle --with-llsc and --without-llsc configure options.
	* config/mips/mips.md (sync, memory_barrier): Wrap sync instrunction
	in %| and %- operand codes.  Depend on GENERATE_SYNC instead of
	ISA_HAS_SYNC.
	(sync_compare_and_swap<mode>, sync_add<mode>, sync_sub<mode>,
	sync_old_add<mode>, sync_old_sub<mode>, sync_new_add<mode>,
	sync_new_sub<mode>, sync_<optab><mode>, sync_old_<optab><mode>,
	sync_new_<optab><mode>, sync_nand<mode>, sync_old_nand<mode>,
	sync_new_nand<mode>, sync_lock_test_and_set<mode>): Depend on
	GENERATE_LL_SC instead of ISA_HAS_LL_SC.
	* config/mips/mips.opt (mllsc): New option.
	* config/mips/mips.c (mips_llsc): Define variable.
	(mips_handle_option): Handle mllsc option.
	(override_options): Set mips_print_operand_punct for '|' and '-'.
	(print_operand): Add new %| and %- operand codes.
	* config/mips/mips.h (mips_llsc_setting): New enum type.
	(mips_llsc): Declare.
	(OPTION_DEFAULT_SPECS): Add llsc handling.
	(GENERATE_SYNC): New macro.
	(GENERATE_LL_SC): New macro.
	(MIPS_COMPARE_AND_SWAP, MIPS_SYNC_OP, MIPS_SYNC_OLD_OP,
	MIPS_SYNC_NEW_OP, MIPS_SYNC_NAND, MIPS_SYNC_OLD_NAND,
	MIPS_SYNC_NEW_NAND, MIPS_SYNC_EXCHANGE): Wrap instructions
	in %| and %- operand codes.

From-SVN: r128392

1 files changed, 24 insertions, 2 deletions

diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c
index 289f46e..1a2cc06 100644
--- a/gcc/config/mips/mips.c
+++ b/gcc/config/mips/mips.c
@@ -636,6 +636,9 @@ static GTY(()) int mips16_flipper;
 /* The -mtext-loads setting.  */
 enum mips_code_readable_setting mips_code_readable = CODE_READABLE_YES;
 
+/* The -mllsc setting.  */
+enum mips_llsc_setting mips_llsc = LLSC_DEFAULT;
+
 /* The architecture selected by -mipsN.  */
 static const struct mips_cpu_info *mips_isa_info;
 
@@ -5711,7 +5714,7 @@ mips_set_current_function (tree fndecl ATTRIBUTE_UNUSED)
 /* Implement TARGET_HANDLE_OPTION.  */
 
 static bool
-mips_handle_option (size_t code, const char *arg, int value ATTRIBUTE_UNUSED)
+mips_handle_option (size_t code, const char *arg, int value)
 {
   switch (code)
     {
@@ -5753,6 +5756,10 @@ mips_handle_option (size_t code, const char *arg, int value ATTRIBUTE_UNUSED)
 	return false;
       return true;
 
+    case OPT_mllsc:
+      mips_llsc = value ? LLSC_YES : LLSC_NO;
+      return true;
+
     default:
       return true;
     }
@@ -6015,6 +6022,8 @@ override_options (void)
   mips_print_operand_punct['$'] = 1;
   mips_print_operand_punct['+'] = 1;
   mips_print_operand_punct['~'] = 1;
+  mips_print_operand_punct['|'] = 1;
+  mips_print_operand_punct['-'] = 1;
 
   /* Set up array to map GCC register number to debug register number.
      Ignore the special purpose register numbers.  */
@@ -6377,7 +6386,10 @@ mips_strip_unspec_address (rtx op)
    '^'	Print the name of the pic call-through register (t9 or $25).
    '$'	Print the name of the stack pointer register (sp or $29).
    '+'	Print the name of the gp register (usually gp or $28).
-   '~'	Output a branch alignment to LABEL_ALIGN(NULL).  */
+   '~'	Output a branch alignment to LABEL_ALIGN(NULL).
+   '|'  Print .set push; .set mips2 if mips_llsc == LLSC_YES
+        && !ISA_HAS_LL_SC.
+   '-'  Print .set pop under the same conditions for '|'.  */
 
 void
 print_operand (FILE *file, rtx op, int letter)
@@ -6507,6 +6519,16 @@ print_operand (FILE *file, rtx op, int letter)
 	  }
 	  break;
 
+	case '|':
+	  if (!ISA_HAS_LL_SC)
+	    fputs (".set\tpush\n\t.set\tmips2\n\t", file);
+	  break;
+
+	case '-':
+	  if (!ISA_HAS_LL_SC)
+	    fputs ("\n\t.set\tpop", file);
+	  break;
+
 	default:
 	  error ("PRINT_OPERAND: unknown punctuation '%c'", letter);
 	  break;