[ARCx] LIBGCC attempt adding configuration

Author: claziss

libgcc/config.host

@@ -95,9 +95,12 @@ amdgcn*-*-*)
 	cpu_type=gcn
 	tmake_file="${tmake_file} t-softfp-sfdf t-softfp"
 	;;
-arc*-*-*)
+arc[be]*-*-*)
 	cpu_type=arc
 	;;
+arc64-*-*)
+	cpu_type=arc64
+	;;
 arm*-*-*)
 	cpu_type=arm
 	;;
@@ -494,17 +497,20 @@ amdgcn*-*-amdhsa)
 	tmake_file="$tmake_file gcn/t-amdgcn"
 	extra_parts="crt0.o"
 	;;
-arc*-*-elf*)
+arc[eb]*-*-elf*)
 	tmake_file="arc/t-arc"
 	extra_parts="crti.o crtn.o crtend.o crtbegin.o crtendS.o crtbeginS.o"
 	extra_parts="$extra_parts crttls.o"
 	;;
-arc*-*-linux*)
+arc[eb]*-*-linux*)
 	tmake_file="${tmake_file} t-slibgcc-libgcc t-slibgcc-nolc-override arc/t-arc-uClibc arc/t-arc"
 	extra_parts="$extra_parts crti.o crtn.o"
 	extra_parts="$extra_parts crttls.o"
 	md_unwind_header=arc/linux-unwind.h
 	;;
+arc64-*-elf)
+	tmake_file="${tmake_file} t-softfp-sfdf t-softfp"
+	;;
 arm-wrs-vxworks7*)
 	tmake_file="$tmake_file arm/t-arm arm/t-elf arm/t-bpabi arm/t-vxworks7"
         tmake_file="$tmake_file t-softfp-sfdf t-softfp-excl arm/t-softfp t-softfp"

libgcc/config/arc64/sfp-machine.h

@@ -0,0 +1,55 @@
+#define _FP_W_TYPE_SIZE         64
+#define _FP_W_TYPE              unsigned long long
+#define _FP_WS_TYPE             signed long long
+#define _FP_I_TYPE              long long
+
+#define _FP_MUL_MEAT_S(R,X,Y)                                   \
+  _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
+#define _FP_MUL_MEAT_D(R,X,Y)                                   \
+  _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_Q(R,X,Y)                                   \
+  _FP_MUL_MEAT_2_wide_3mul(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
+
+#define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
+#define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
+#define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
+
+#define _FP_NANFRAC_S           _FP_QNANBIT_S
+#define _FP_NANFRAC_D           _FP_QNANBIT_D
+#define _FP_NANFRAC_Q           _FP_QNANBIT_Q, 0
+
+typedef int TItype __attribute__ ((mode (TI)));
+typedef unsigned int UTItype __attribute__ ((mode (TI)));
+#define TI_BITS (__CHAR_BIT__ * (int)sizeof(TItype))
+
+/* 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_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)
+
+/* Not checked.  */
+#define _FP_TININESS_AFTER_ROUNDING 0
+
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN    4321
+
+# define __BYTE_ORDER __LITTLE_ENDIAN
+
+/* 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)));