Remove SF_SIZE etc. target macros

["Joseph S. Myers" <joseph at codesourcery dot com>]

This patch replaces the target macros SF_SIZE, DF_SIZE, XF_SIZE and
TF_SIZE, used to tell libgcc the number of bits in the mantissas of
floating-point modes, with __LIBGCC_SF_MANT_DIG__ etc. macros defined
if -fbuilding-libgcc for all floating-point modes.  Various libgcc
logic to determine default values of the macros based on other target
macros such as LIBGCC2_LONG_DOUBLE_TYPE_SIZE can thus be removed.

Bootstrapped with no regressions on x86_64-unknown-linux-gnu.  OK to
commit?

gcc:
2014-09-05  Joseph Myers  <joseph@codesourcery.com>

	* config/i386/cygming.h (TF_SIZE): Remove.
	* config/i386/darwin.h (TF_SIZE): Remove.
	* config/i386/dragonfly.h (TF_SIZE): Remove.
	* config/i386/freebsd.h (TF_SIZE): Remove.
	* config/i386/gnu-user-common.h (TF_SIZE): Remove.
	* config/i386/openbsdelf.h (TF_SIZE): Remove.
	* config/i386/sol2.h (TF_SIZE): Remove.
	* config/ia64/hpux.h (XF_SIZE, TF_SIZE): Remove.
	* config/ia64/linux.h (TF_SIZE): Remove.
	* doc/tm.texi.in (SF_SIZE, DF_SIZE, XF_SIZE, TF_SIZE): Remove.
	* doc/tm.texi: Regenerate.
	* system.h (SF_SIZE, DF_SIZE, XF_SIZE, TF_SIZE): Poison.

gcc/c-family:
2014-09-05  Joseph Myers  <joseph@codesourcery.com>

	* c-cppbuiltin.c (c_cpp_builtins): Define macros for mantissa
	digits of floating-point modes if -fbuilding-libgcc.

libgcc:
2014-09-05  Joseph Myers  <joseph@codesourcery.com>

	* libgcc2.c (SF_SIZE): Change all uses to __LIBGCC_SF_MANT_DIG__.
	(DF_SIZE): Change all uses to __LIBGCC_DF_MANT_DIG__.
	(XF_SIZE): Change all uses to __LIBGCC_XF_MANT_DIG__.
	(TF_SIZE): Change all uses to __LIBGCC_TF_MANT_DIG__.
	* libgcc2.h (SF_SIZE): Change to __LIBGCC_SF_MANT_DIG__.  Give
	error if not defined and LIBGCC2_HAS_SF_MODE is defined.
	(DF_SIZE): Change to __LIBGCC_DF_MANT_DIG__.  Give error if not
	defined and LIBGCC2_HAS_DF_MODE is defined.
	(XF_SIZE): Change to __LIBGCC_XF_MANT_DIG__.  Give error if not
	defined and LIBGCC2_HAS_XF_MODE is defined.
	(TF_SIZE): Change to __LIBGCC_TF_MANT_DIG__.  Give error if not
	defined and LIBGCC2_HAS_TF_MODE is defined.

Index: gcc/c-family/c-cppbuiltin.c
===================================================================
--- gcc/c-family/c-cppbuiltin.c	(revision 214954)
+++ gcc/c-family/c-cppbuiltin.c	(working copy)
@@ -944,6 +944,20 @@ c_cpp_builtins (cpp_reader *pfile)
   /* For libgcc-internal use only.  */
   if (flag_building_libgcc)
     {
+      /* Properties of floating-point modes for libgcc2.c.  */
+      for (enum machine_mode mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT);
+	   mode != VOIDmode;
+	   mode = GET_MODE_WIDER_MODE (mode))
+	{
+	  const char *name = GET_MODE_NAME (mode);
+	  char *macro_name
+	    = (char *) alloca (strlen (name)
+			       + sizeof ("__LIBGCC__MANT_DIG__"));
+	  sprintf (macro_name, "__LIBGCC_%s_MANT_DIG__", name);
+	  builtin_define_with_int_value (macro_name,
+					 REAL_MODE_FORMAT (mode)->p);
+	}
+
       /* For libgcc crtstuff.c and libgcc2.c.  */
       builtin_define_with_int_value ("__LIBGCC_EH_TABLES_CAN_BE_READ_ONLY__",
 				     EH_TABLES_CAN_BE_READ_ONLY);
Index: gcc/config/i386/cygming.h
===================================================================
--- gcc/config/i386/cygming.h	(revision 214954)
+++ gcc/config/i386/cygming.h	(working copy)
@@ -343,7 +343,6 @@ do {						\
 #undef LIBGCC2_HAS_TF_MODE
 #define LIBGCC2_HAS_TF_MODE 1
 #define LIBGCC2_TF_CEXT q
-#define TF_SIZE 113
 
 /* Output function declarations at the end of the file.  */
 #undef TARGET_ASM_FILE_END
Index: gcc/config/i386/darwin.h
===================================================================
--- gcc/config/i386/darwin.h	(revision 214954)
+++ gcc/config/i386/darwin.h	(working copy)
@@ -157,7 +157,6 @@ extern int darwin_emit_branch_islands;
 #undef LIBGCC2_HAS_TF_MODE
 #define LIBGCC2_HAS_TF_MODE 1
 #define LIBGCC2_TF_CEXT q
-#define TF_SIZE 113
 
 #undef TARGET_ASM_FILE_END
 #define TARGET_ASM_FILE_END darwin_file_end
Index: gcc/config/i386/dragonfly.h
===================================================================
--- gcc/config/i386/dragonfly.h	(revision 214954)
+++ gcc/config/i386/dragonfly.h	(working copy)
@@ -93,7 +93,6 @@ see the files COPYING3 and COPYING.RUNTIME respect
 #undef LIBGCC2_HAS_TF_MODE
 #define LIBGCC2_HAS_TF_MODE 1
 #define LIBGCC2_TF_CEXT q
-#define TF_SIZE 113
 
 /* Static stack checking is supported by means of probes.  */
 #define STACK_CHECK_STATIC_BUILTIN 1
Index: gcc/config/i386/freebsd.h
===================================================================
--- gcc/config/i386/freebsd.h	(revision 214954)
+++ gcc/config/i386/freebsd.h	(working copy)
@@ -135,7 +135,6 @@ along with GCC; see the file COPYING3.  If not see
 #undef LIBGCC2_HAS_TF_MODE
 #define LIBGCC2_HAS_TF_MODE 1
 #define LIBGCC2_TF_CEXT q
-#define TF_SIZE 113
 
 /* Static stack checking is supported by means of probes.  */
 #define STACK_CHECK_STATIC_BUILTIN 1
Index: gcc/config/i386/gnu-user-common.h
===================================================================
--- gcc/config/i386/gnu-user-common.h	(revision 214954)
+++ gcc/config/i386/gnu-user-common.h	(working copy)
@@ -61,7 +61,6 @@ along with GCC; see the file COPYING3.  If not see
 #undef LIBGCC2_HAS_TF_MODE
 #define LIBGCC2_HAS_TF_MODE 1
 #define LIBGCC2_TF_CEXT q
-#define TF_SIZE 113
 
 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
 
Index: gcc/config/i386/openbsdelf.h
===================================================================
--- gcc/config/i386/openbsdelf.h	(revision 214954)
+++ gcc/config/i386/openbsdelf.h	(working copy)
@@ -116,4 +116,3 @@ along with GCC; see the file COPYING3.  If not see
 #undef LIBGCC2_HAS_TF_MODE
 #define LIBGCC2_HAS_TF_MODE 1
 #define LIBGCC2_TF_CEXT q
-#define TF_SIZE 113
Index: gcc/config/i386/sol2.h
===================================================================
--- gcc/config/i386/sol2.h	(revision 214954)
+++ gcc/config/i386/sol2.h	(working copy)
@@ -241,4 +241,3 @@ along with GCC; see the file COPYING3.  If not see
 #undef LIBGCC2_HAS_TF_MODE
 #define LIBGCC2_HAS_TF_MODE 1
 #define LIBGCC2_TF_CEXT q
-#define TF_SIZE 113
Index: gcc/config/ia64/hpux.h
===================================================================
--- gcc/config/ia64/hpux.h	(revision 214954)
+++ gcc/config/ia64/hpux.h	(working copy)
@@ -192,12 +192,10 @@ do {								\
 /* Put all *xf routines in libgcc, regardless of long double size.  */
 #undef LIBGCC2_HAS_XF_MODE
 #define LIBGCC2_HAS_XF_MODE 1
-#define XF_SIZE 64
 
 /* Put all *tf routines in libgcc, regardless of long double size.  */
 #undef LIBGCC2_HAS_TF_MODE
 #define LIBGCC2_HAS_TF_MODE 1
-#define TF_SIZE 113
 
 /* HP-UX headers are C++-compatible.  */
 #define NO_IMPLICIT_EXTERN_C
Index: gcc/config/ia64/linux.h
===================================================================
--- gcc/config/ia64/linux.h	(revision 214954)
+++ gcc/config/ia64/linux.h	(working copy)
@@ -81,7 +81,6 @@ do {						\
 #define LIBGCC2_HAS_TF_MODE 1
 #undef LIBGCC2_TF_CEXT
 #define LIBGCC2_TF_CEXT q
-#define TF_SIZE 113
 
 #undef TARGET_INIT_LIBFUNCS
 #define TARGET_INIT_LIBFUNCS ia64_soft_fp_init_libfuncs
Index: gcc/doc/tm.texi
===================================================================
--- gcc/doc/tm.texi	(revision 214954)
+++ gcc/doc/tm.texi	(working copy)
@@ -1602,20 +1602,6 @@ uses this macro should also arrange to use @file{t
 the libgcc @file{config.host}.
 @end defmac
 
-@defmac SF_SIZE
-@defmacx DF_SIZE
-@defmacx XF_SIZE
-@defmacx TF_SIZE
-Define these macros to be the size in bits of the mantissa of
-@code{SFmode}, @code{DFmode}, @code{XFmode} and @code{TFmode} values,
-if the defaults in @file{libgcc2.h} are inappropriate.  By default,
-@code{FLT_MANT_DIG} is used for @code{SF_SIZE}, @code{LDBL_MANT_DIG}
-for @code{XF_SIZE} and @code{TF_SIZE}, and @code{DBL_MANT_DIG} or
-@code{LDBL_MANT_DIG} for @code{DF_SIZE} according to whether
-@code{DOUBLE_TYPE_SIZE} or
-@code{LIBGCC2_LONG_DOUBLE_TYPE_SIZE} is 64.
-@end defmac
-
 @defmac TARGET_FLT_EVAL_METHOD
 A C expression for the value for @code{FLT_EVAL_METHOD} in @file{float.h},
 assuming, if applicable, that the floating-point control word is in its
Index: gcc/doc/tm.texi.in
===================================================================
--- gcc/doc/tm.texi.in	(revision 214954)
+++ gcc/doc/tm.texi.in	(working copy)
@@ -1444,20 +1444,6 @@ uses this macro should also arrange to use @file{t
 the libgcc @file{config.host}.
 @end defmac
 
-@defmac SF_SIZE
-@defmacx DF_SIZE
-@defmacx XF_SIZE
-@defmacx TF_SIZE
-Define these macros to be the size in bits of the mantissa of
-@code{SFmode}, @code{DFmode}, @code{XFmode} and @code{TFmode} values,
-if the defaults in @file{libgcc2.h} are inappropriate.  By default,
-@code{FLT_MANT_DIG} is used for @code{SF_SIZE}, @code{LDBL_MANT_DIG}
-for @code{XF_SIZE} and @code{TF_SIZE}, and @code{DBL_MANT_DIG} or
-@code{LDBL_MANT_DIG} for @code{DF_SIZE} according to whether
-@code{DOUBLE_TYPE_SIZE} or
-@code{LIBGCC2_LONG_DOUBLE_TYPE_SIZE} is 64.
-@end defmac
-
 @defmac TARGET_FLT_EVAL_METHOD
 A C expression for the value for @code{FLT_EVAL_METHOD} in @file{float.h},
 assuming, if applicable, that the floating-point control word is in its
Index: gcc/system.h
===================================================================
--- gcc/system.h	(revision 214954)
+++ gcc/system.h	(working copy)
@@ -934,7 +934,7 @@ extern void fancy_abort (const char *, int, const
 	REG_CLASS_FROM_CONSTRAINT REG_CLASS_FOR_CONSTRAINT		   \
 	EXTRA_CONSTRAINT_STR EXTRA_MEMORY_CONSTRAINT			   \
 	EXTRA_ADDRESS_CONSTRAINT CONST_DOUBLE_OK_FOR_CONSTRAINT_P	   \
-	CALLER_SAVE_PROFITABLE
+	CALLER_SAVE_PROFITABLE SF_SIZE DF_SIZE XF_SIZE TF_SIZE
 
 /* Hooks that are no longer used.  */
  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE	\
Index: libgcc/libgcc2.c
===================================================================
--- libgcc/libgcc2.c	(revision 214954)
+++ libgcc/libgcc2.c	(working copy)
@@ -1506,7 +1506,7 @@ __fixsfdi (SFtype a)
 XFtype
 __floatdixf (DWtype u)
 {
-#if W_TYPE_SIZE > XF_SIZE
+#if W_TYPE_SIZE > __LIBGCC_XF_MANT_DIG__
 # error
 #endif
   XFtype d = (Wtype) (u >> W_TYPE_SIZE);
@@ -1520,7 +1520,7 @@ __floatdixf (DWtype u)
 XFtype
 __floatundixf (UDWtype u)
 {
-#if W_TYPE_SIZE > XF_SIZE
+#if W_TYPE_SIZE > __LIBGCC_XF_MANT_DIG__
 # error
 #endif
   XFtype d = (UWtype) (u >> W_TYPE_SIZE);
@@ -1534,7 +1534,7 @@ __floatundixf (UDWtype u)
 TFtype
 __floatditf (DWtype u)
 {
-#if W_TYPE_SIZE > TF_SIZE
+#if W_TYPE_SIZE > __LIBGCC_TF_MANT_DIG__
 # error
 #endif
   TFtype d = (Wtype) (u >> W_TYPE_SIZE);
@@ -1548,7 +1548,7 @@ __floatditf (DWtype u)
 TFtype
 __floatunditf (UDWtype u)
 {
-#if W_TYPE_SIZE > TF_SIZE
+#if W_TYPE_SIZE > __LIBGCC_TF_MANT_DIG__
 # error
 #endif
   TFtype d = (UWtype) (u >> W_TYPE_SIZE);
@@ -1568,11 +1568,11 @@ __floatunditf (UDWtype u)
 #if defined(L_floatdisf)
 #define FUNC __floatdisf
 #define FSTYPE SFtype
-#define FSSIZE SF_SIZE
+#define FSSIZE __LIBGCC_SF_MANT_DIG__
 #else
 #define FUNC __floatdidf
 #define FSTYPE DFtype
-#define FSSIZE DF_SIZE
+#define FSSIZE __LIBGCC_DF_MANT_DIG__
 #endif
 
 FSTYPE
@@ -1584,18 +1584,18 @@ FUNC (DWtype u)
   f *= Wtype_MAXp1_F;
   f += (UWtype)u;
   return f;
-#elif (LIBGCC2_HAS_DF_MODE && F_MODE_OK (DF_SIZE))	\
-     || (LIBGCC2_HAS_XF_MODE && F_MODE_OK (XF_SIZE))	\
-     || (LIBGCC2_HAS_TF_MODE && F_MODE_OK (TF_SIZE))
+#elif (LIBGCC2_HAS_DF_MODE && F_MODE_OK (__LIBGCC_DF_MANT_DIG__))	\
+     || (LIBGCC2_HAS_XF_MODE && F_MODE_OK (__LIBGCC_XF_MANT_DIG__))	\
+     || (LIBGCC2_HAS_TF_MODE && F_MODE_OK (__LIBGCC_TF_MANT_DIG__))
 
-#if (LIBGCC2_HAS_DF_MODE && F_MODE_OK (DF_SIZE))
-# define FSIZE DF_SIZE
+#if (LIBGCC2_HAS_DF_MODE && F_MODE_OK (__LIBGCC_DF_MANT_DIG__))
+# define FSIZE __LIBGCC_DF_MANT_DIG__
 # define FTYPE DFtype
-#elif (LIBGCC2_HAS_XF_MODE && F_MODE_OK (XF_SIZE))
-# define FSIZE XF_SIZE
+#elif (LIBGCC2_HAS_XF_MODE && F_MODE_OK (__LIBGCC_XF_MANT_DIG__))
+# define FSIZE __LIBGCC_XF_MANT_DIG__
 # define FTYPE XFtype
-#elif (LIBGCC2_HAS_TF_MODE && F_MODE_OK (TF_SIZE))
-# define FSIZE TF_SIZE
+#elif (LIBGCC2_HAS_TF_MODE && F_MODE_OK (__LIBGCC_TF_MANT_DIG__))
+# define FSIZE __LIBGCC_TF_MANT_DIG__
 # define FTYPE TFtype
 #else
 # error
@@ -1684,11 +1684,11 @@ FUNC (DWtype u)
 #if defined(L_floatundisf)
 #define FUNC __floatundisf
 #define FSTYPE SFtype
-#define FSSIZE SF_SIZE
+#define FSSIZE __LIBGCC_SF_MANT_DIG__
 #else
 #define FUNC __floatundidf
 #define FSTYPE DFtype
-#define FSSIZE DF_SIZE
+#define FSSIZE __LIBGCC_DF_MANT_DIG__
 #endif
 
 FSTYPE
@@ -1700,18 +1700,18 @@ FUNC (UDWtype u)
   f *= Wtype_MAXp1_F;
   f += (UWtype)u;
   return f;
-#elif (LIBGCC2_HAS_DF_MODE && F_MODE_OK (DF_SIZE))	\
-     || (LIBGCC2_HAS_XF_MODE && F_MODE_OK (XF_SIZE))	\
-     || (LIBGCC2_HAS_TF_MODE && F_MODE_OK (TF_SIZE))
+#elif (LIBGCC2_HAS_DF_MODE && F_MODE_OK (__LIBGCC_DF_MANT_DIG__))	\
+     || (LIBGCC2_HAS_XF_MODE && F_MODE_OK (__LIBGCC_XF_MANT_DIG__))	\
+     || (LIBGCC2_HAS_TF_MODE && F_MODE_OK (__LIBGCC_TF_MANT_DIG__))
 
-#if (LIBGCC2_HAS_DF_MODE && F_MODE_OK (DF_SIZE))
-# define FSIZE DF_SIZE
+#if (LIBGCC2_HAS_DF_MODE && F_MODE_OK (__LIBGCC_DF_MANT_DIG__))
+# define FSIZE __LIBGCC_DF_MANT_DIG__
 # define FTYPE DFtype
-#elif (LIBGCC2_HAS_XF_MODE && F_MODE_OK (XF_SIZE))
-# define FSIZE XF_SIZE
+#elif (LIBGCC2_HAS_XF_MODE && F_MODE_OK (__LIBGCC_XF_MANT_DIG__))
+# define FSIZE __LIBGCC_XF_MANT_DIG__
 # define FTYPE XFtype
-#elif (LIBGCC2_HAS_TF_MODE && F_MODE_OK (TF_SIZE))
-# define FSIZE TF_SIZE
+#elif (LIBGCC2_HAS_TF_MODE && F_MODE_OK (__LIBGCC_TF_MANT_DIG__))
+# define FSIZE __LIBGCC_TF_MANT_DIG__
 # define FTYPE TFtype
 #else
 # error
Index: libgcc/libgcc2.h
===================================================================
--- libgcc/libgcc2.h	(revision 214954)
+++ libgcc/libgcc2.h	(working copy)
@@ -59,41 +59,35 @@ extern void __eprintf (const char *, const char *,
   (BITS_PER_UNIT == 8 && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128)
 #endif
 
-#ifndef SF_SIZE
+#ifndef __LIBGCC_SF_MANT_DIG__
 #if LIBGCC2_HAS_SF_MODE
-#define SF_SIZE FLT_MANT_DIG
+#error __LIBGCC_SF_MANT_DIG__ not defined
 #else
-#define SF_SIZE 0
+#define __LIBGCC_SF_MANT_DIG__ 0
 #endif
 #endif
 
-#ifndef DF_SIZE
+#ifndef __LIBGCC_DF_MANT_DIG__
 #if LIBGCC2_HAS_DF_MODE
-#if __SIZEOF_DOUBLE__ * __CHAR_BIT__ == 64
-#define DF_SIZE DBL_MANT_DIG
-#elif LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 64
-#define DF_SIZE LDBL_MANT_DIG
+#error __LIBGCC_DF_MANT_DIG__ not defined
 #else
-#define DF_SIZE 0
+#define __LIBGCC_DF_MANT_DIG__ 0
 #endif
-#else
-#define DF_SIZE 0
 #endif
-#endif
 
-#ifndef XF_SIZE
+#ifndef __LIBGCC_XF_MANT_DIG__
 #if LIBGCC2_HAS_XF_MODE
-#define XF_SIZE LDBL_MANT_DIG
+#error __LIBGCC_XF_MANT_DIG__ not defined
 #else
-#define XF_SIZE 0
+#define __LIBGCC_XF_MANT_DIG__ 0
 #endif
 #endif
 
-#ifndef TF_SIZE
+#ifndef __LIBGCC_TF_MANT_DIG__
 #if LIBGCC2_HAS_TF_MODE
-#define TF_SIZE LDBL_MANT_DIG
+#error __LIBGCC_TF_MANT_DIG__ not defined
 #else
-#define TF_SIZE 0
+#define __LIBGCC_TF_MANT_DIG__ 0
 #endif
 #endif
 

-- 
Joseph S. Myers
joseph@codesourcery.com