sh-elf-vhex - v2.2.2-rc0 : use the softfp floating library in libgc…

…c instead of `fdpbit`

*fix*
> [patches]
  | [gcc] use the `softfp` floating point library in libgcc instead of `fdpbit`
  | [gcc] add missing `sfp-machine.h` implementation
> [project]
  | [readme] fix `softfp` information

README.md

@@ -43,7 +43,7 @@ particular GCC.
 * we do not provide a specialized default linker script (for the moment)
 * compilation of the shared libgcc (`t-slibgcc`)
 * compilation of the libgcc in PIC (`t-libgcc-pic`)
-* compilation of the library for emulated floating point numbers (`t-fdpbit`)
+* compilation of the library for emulated floating point numbers (`t-softfp`)
 
 ## Installing
 

patches/gcc/14.1.0/libgcc/config.host

@@ -1441,7 +1441,8 @@ sh*-*-vhex*)
 		t-slibgcc \
 		t-slibgcc-libgcc \
 		t-libgcc-pic \
-		t-fdpbit"
+		t-softfp-sfdf \
+		t-softfp"
 	;;
 sh-wrs-vxworks)
 	tmake_file="$tmake_file sh/t-sh t-crtstuff-pic t-fdpbit"

patches/gcc/14.1.0/libgcc/config/sh/sfp-machine.h

@@ -0,0 +1,83 @@
+/* Software floating-point machine description for SuperH.
+
+   Copyright (C) 2016-2024 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.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#define _FP_W_TYPE_SIZE     32
+#define _FP_W_TYPE          unsigned long
+#define _FP_WS_TYPE         signed long
+#define _FP_I_TYPE          long
+
+#define _FP_MUL_MEAT_S(R,X,Y)               \
+  _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_D(R,X,Y)               \
+  _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_Q(R,X,Y)               \
+  _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
+
+#define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_udiv_norm(S,R,X,Y)
+#define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_2_udiv(D,R,X,Y)
+#define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
+
+#define _FP_NANFRAC_B       _FP_QNANBIT_B
+#define _FP_NANFRAC_H       _FP_QNANBIT_H
+#define _FP_NANFRAC_S       _FP_QNANBIT_S
+#define _FP_NANFRAC_D       _FP_QNANBIT_D, 0
+#define _FP_NANFRAC_Q       _FP_QNANBIT_Q, 0, 0, 0
+
+/* The type of the result of a floating point comparison.  This must
+   match __libgcc_cmp_return__ in GCC for the target.  */
+typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
+#define CMPtype __gcc_CMPtype
+
+#define _FP_NANSIGN_B       0
+#define _FP_NANSIGN_H       0
+#define _FP_NANSIGN_S       0
+#define _FP_NANSIGN_D       0
+#define _FP_NANSIGN_Q       0
+
+#define _FP_KEEPNANFRACP 0
+#define _FP_QNANNEGATEDP 0
+
+#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)  \
+  do {                                      \
+    R##_s = _FP_NANSIGN_##fs;               \
+    _FP_FRAC_SET_##wc(R,_FP_NANFRAC_##fs);  \
+    R##_c = FP_CLS_NAN;                     \
+  } while (0)
+
+#define _FP_TININESS_AFTER_ROUNDING 1
+
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN    4321
+
+#if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+#define __BYTE_ORDER __BIG_ENDIAN
+#else
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#endif
+
+/* Define ALIASNAME as a strong alias for NAME.  */
+# define strong_alias(name, aliasname) _strong_alias(name, aliasname)
+# define _strong_alias(name, aliasname) \
+  extern __typeof (name) aliasname __attribute__ ((alias (#name)));