gdb/riscv: Add equality operators to riscv_gdb_features

Add '==' and '!=' operators for the struct riscv_gdb_features,
allowing a small simplification.

gdb/ChangeLog:

	* arch/riscv.h (riscv_gdb_features::operator==): New.
	(riscv_gdb_features::operator!=): New.
	* riscv-tdep.c (riscv_gdbarch_init): Make use of the inequality
	operator.

gdb/ChangeLog

@@ -1,3 +1,10 @@
+2018-11-30  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* arch/riscv.h (riscv_gdb_features::operator==): New.
+	(riscv_gdb_features::operator!=): New.
+	* riscv-tdep.c (riscv_gdbarch_init): Make use of the inequality
+	operator.
+
 2018-11-30  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* arch/riscv.h (riscv_create_target_description): Make return type

gdb/arch/riscv.h

@@ -53,6 +53,19 @@ struct riscv_gdbarch_features
      this field is true then the hardware floating point abi is in use, and
      values are passed in f-registers matching the size of FLEN.  */
   bool hw_float_abi = false;
+
+  /* Equality operator.  */
+  bool operator== (const struct riscv_gdbarch_features &rhs) const
+  {
+    return (xlen == rhs.xlen && flen == rhs.flen
+	    && hw_float_abi == rhs.hw_float_abi);
+  }
+
+  /* Inequality operator.  */
+  bool operator!= (const struct riscv_gdbarch_features &rhs) const
+  {
+    return !((*this) == rhs);
+  }
 };
 
 /* Create and return a target description that is compatible with

gdb/riscv-tdep.c

@@ -3025,9 +3025,7 @@ riscv_gdbarch_init (struct gdbarch_info info,
          gdbarch.  */
       struct gdbarch_tdep *other_tdep = gdbarch_tdep (arches->gdbarch);
 
-      if (other_tdep->features.hw_float_abi != features.hw_float_abi
-          || other_tdep->features.xlen != features.xlen
-          || other_tdep->features.flen != features.flen)
+      if (other_tdep->features != features)
         continue;
 
       break;