config.gcc (mips*-sde-elf*): Don't use sdemtk.opt.

2010-05-08  Richard Sandiford  <rdsandiford@googlemail.com>
	    Jim Wilson  <wilson@codesourcery.com>

gcc/
	* config.gcc (mips*-sde-elf*): Don't use sdemtk.opt.
	* config/mips/mips.h (TARGET_CPU_CPP_BUILTINS): Define __mips_no_float
	for TARGET_NO_FLOAT.
	* config/mips/mips.c (mips_file_start): Expand conditional expression
	into "if" statements.  Use .gnu_attribute 4,0 for TARGET_NO_FLOAT.
	(mips_override_options): Move -mno-float override -msoft-float and
	-mhard-float.
	* config/mips/mips.opt (mno-float): Move from sdemtk.opt, but add
	Condition(TARGET_SUPPORTS_NO_FLOAT).
	* config/mips/sdemtk.h (TARGET_OS_CPP_BUILTINS): Don't set
	__mips_no_float here.
	(SUBTARGET_OVERRIDE_OPTIONS): Delete.
	(TARGET_SUPPORTS_NO_FLOAT): Define.
	* config/mips/sdemtk.opt: Delete.

From-SVN: r159642

gcc/ChangeLog

+2010-05-20  Richard Sandiford  <rdsandiford@googlemail.com>
+
+	* config.gcc (mips*-sde-elf*): Don't use sdemtk.opt.
+	* config/mips/mips.h (TARGET_CPU_CPP_BUILTINS): Define __mips_no_float
+	for TARGET_NO_FLOAT.
+	* config/mips/mips.c (mips_file_start): Expand conditional expression
+	into "if" statements.  Use .gnu_attribute 4,0 for TARGET_NO_FLOAT.
+	(mips_override_options): Move -mno-float override -msoft-float and
+	-mhard-float.
+	* config/mips/mips.opt (mno-float): Move from sdemtk.opt, but add
+	Condition(TARGET_SUPPORTS_NO_FLOAT).
+	* config/mips/sdemtk.h (TARGET_OS_CPP_BUILTINS): Don't set
+	__mips_no_float here.
+	(SUBTARGET_OVERRIDE_OPTIONS): Delete.
+	(TARGET_SUPPORTS_NO_FLOAT): Define.
+	* config/mips/sdemtk.opt: Delete.
+
 2010-05-20  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	* ipa-prop.c (compute_complex_ancestor_jump_func): Bail

gcc/config.gcc

@@ -1760,7 +1760,6 @@ mips*-sde-elf*)
 	    # MIPS toolkit libraries.
 	    tm_file="$tm_file mips/sdemtk.h"
 	    tmake_file="$tmake_file mips/t-sdemtk"
-	    extra_options="$extra_options mips/sdemtk.opt"
 	    case ${enable_threads} in
 	      "" | yes | mipssde)
 		thread_file='mipssde'

gcc/config/mips/mips.c

@@ -8172,10 +8172,27 @@ mips_file_start (void)
 		 "\t.previous\n", TARGET_LONG64 ? 64 : 32);
 
 #ifdef HAVE_AS_GNU_ATTRIBUTE
-      fprintf (asm_out_file, "\t.gnu_attribute 4, %d\n",
-	       (TARGET_HARD_FLOAT_ABI
-		? (TARGET_DOUBLE_FLOAT
-		   ? ((!TARGET_64BIT && TARGET_FLOAT64) ? 4 : 1) : 2) : 3));
+      {
+	int attr;
+
+	/* No floating-point operations, -mno-float.  */
+	if (TARGET_NO_FLOAT)
+	  attr = 0;
+	/* Soft-float code, -msoft-float.  */
+	else if (!TARGET_HARD_FLOAT_ABI)
+	  attr = 3;
+	/* Single-float code, -msingle-float.  */
+	else if (!TARGET_DOUBLE_FLOAT)
+	  attr = 2;
+	/* 64-bit FP registers on a 32-bit target, -mips32r2 -mfp64.  */
+	else if (!TARGET_64BIT && TARGET_FLOAT64)
+	  attr = 4;
+	/* Regular FP code, FP regs same size as GP regs, -mdouble-float.  */
+	else
+	  attr = 1;
+
+	fprintf (asm_out_file, "\t.gnu_attribute 4, %d\n", attr);
+      }
 #endif
     }
 
@@ -15405,6 +15422,13 @@ mips_override_options (void)
   SUBTARGET_OVERRIDE_OPTIONS;
 #endif
 
+  /* -mno-float overrides -mhard-float and -msoft-float.  */
+  if (TARGET_NO_FLOAT)
+    {
+      target_flags |= MASK_SOFT_FLOAT_ABI;
+      target_flags_explicit |= MASK_SOFT_FLOAT_ABI;
+    }
+
   /* Set the small data limit.  */
   mips_small_data_threshold = (g_switch_set
 			       ? g_switch_value

gcc/config/mips/mips.h

@@ -536,7 +536,9 @@ enum mips_code_readable_setting {
 									\
       /* These defines reflect the ABI in use, not whether the  	\
 	 FPU is directly accessible.  */				\
-      if (TARGET_HARD_FLOAT_ABI)					\
+      if (TARGET_NO_FLOAT)						\
+	builtin_define ("__mips_no_float");				\
+      else if (TARGET_HARD_FLOAT_ABI)					\
 	builtin_define ("__mips_hard_float");				\
       else								\
 	builtin_define ("__mips_soft_float");				\

gcc/config/mips/mips.opt

@@ -224,6 +224,10 @@ mmt
 Target Report Var(TARGET_MT)
 Allow the use of MT instructions
 
+mno-float
+Target Report RejectNegative Var(TARGET_NO_FLOAT) Condition(TARGET_SUPPORTS_NO_FLOAT)
+Prevent the use of all floating-point operations
+
 mno-flush-func
 Target RejectNegative
 Do not use a cache-flushing function before calling stack trampolines

gcc/config/mips/sdemtk.h

@@ -35,10 +35,7 @@ along with GCC; see the file COPYING3.  If not see
 	builtin_define ("__mipsfp64");			\
 							\
       if (TARGET_NO_FLOAT) 				\
-	{						\
-	  builtin_define ("__NO_FLOAT");		\
-	  builtin_define ("__mips_no_float");		\
-	}						\
+	builtin_define ("__NO_FLOAT");			\
       else if (TARGET_SOFT_FLOAT_ABI)			\
 	builtin_define ("__SOFT_FLOAT");		\
       else if (TARGET_SINGLE_FLOAT)			\
@@ -57,18 +54,6 @@ along with GCC; see the file COPYING3.  If not see
     }							\
   while (0)
 
-#undef SUBTARGET_OVERRIDE_OPTIONS
-#define SUBTARGET_OVERRIDE_OPTIONS			\
-  do							\
-    {							\
-      if (TARGET_NO_FLOAT)				\
-	{						\
-	  target_flags |= MASK_SOFT_FLOAT_ABI;		\
-	  target_flags_explicit |= MASK_SOFT_FLOAT_ABI;	\
-	}						\
-    }							\
-  while (0)
-
 /* For __clear_cache in libgcc2.c.  */
 #ifdef IN_LIBGCC2
 extern void mips_sync_icache (void *beg, unsigned long len);
@@ -113,3 +98,6 @@ extern void mips_sync_icache (void *beg, unsigned long len);
 /* ...nor does the call sequence preserve $31.  */
 #undef MIPS_SAVE_REG_FOR_PROFILING_P
 #define MIPS_SAVE_REG_FOR_PROFILING_P(REGNO) ((REGNO) == RETURN_ADDR_REGNUM)
+
+/* Compile in support for the -mno-float option.  */
+#define TARGET_SUPPORTS_NO_FLOAT 1

gcc/config/mips/sdemtk.opt

-; Options for the MIPS SDE configuration.
-;
-; Copyright (C) 2007 Free Software Foundation, Inc.
-;
-; This file is part of GCC.
-;
-; GCC is free software; you can redistribute it and/or modify it under
-; the terms of the GNU General Public License as published by the Free
-; Software Foundation; either version 3, or (at your option) any later
-; version.
-;
-; GCC is distributed in the hope that it will be useful, but WITHOUT
-; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
-; License for more details.
-;
-; You should have received a copy of the GNU General Public License
-; along with GCC; see the file COPYING3.  If not see
-; <http://www.gnu.org/licenses/>.
-
-mno-float
-Target Report RejectNegative Var(TARGET_NO_FLOAT)
-Prevent the use of all floating-point operations