jcf-write.c (generate_bytecode_insns): Only write const_0 if not negative zero.

	* jcf-write.c (generate_bytecode_insns): Only write const_0 if not
	negative zero.

From-SVN: r52427

gcc/java/ChangeLog

+2002-04-16  Mark Wielaard  <mark@klomp.org>
+
+	* jcf-write.c (generate_bytecode_insns): Only write const_0 if not
+	negative zero.
+
 2002-04-16  Bryce McKinlay  <bryce@waitaki.otago.ac.nz>
 
 	Fix for PR java/6294:

gcc/java/jcf-write.c

@@ -25,6 +25,7 @@ The Free Software Foundation is independent of Sun Microsystems, Inc.  */
 #include "system.h"
 #include "jcf.h"
 #include "tree.h"
+#include "real.h"
 #include "java-tree.h"
 #include "obstack.h"
 #undef AND
@@ -1536,7 +1537,7 @@ generate_bytecode_insns (exp, target, state)
       {
 	int prec = TYPE_PRECISION (type) >> 5;
 	RESERVE(1);
-	if (real_zerop (exp))
+	if (real_zerop (exp) && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (exp)))
 	  OP1 (prec == 1 ? OPCODE_fconst_0 : OPCODE_dconst_0);
 	else if (real_onep (exp))
 	  OP1 (prec == 1 ? OPCODE_fconst_1 : OPCODE_dconst_1);