--- a/hotspot/agent/src/share/classes/sun/jvm/hotspot/asm/sparc/RegisterDecoder.java Thu Sep 27 11:24:19 2012 -0700
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,85 +0,0 @@
-/*
- * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code 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
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-package sun.jvm.hotspot.asm.sparc;
-
-import sun.jvm.hotspot.asm.RTLDataTypes;
-
-class RegisterDecoder implements /* imports */ RTLDataTypes {
- // refer to page 40 - section 5.1.4.1 - Floating-point Register Number Encoding
- private static SPARCFloatRegister decodeDouble(int num) {
- // 6 bit double precision registers are encoded in 5 bits as
- // b<4> b<3> b<2> b<1> b<5>.
-
- boolean lsb = (0x1 & num) != 0;
- if (lsb)
- num |= 0x20; // 10000b
-
- if ((num % 2) != 0)
- return null;
-
- return SPARCFloatRegisters.getRegister(num);
- }
-
- private static SPARCFloatRegister decodeQuad(int num) {
- // 6 bit quad precision registers are encoded in 5 bits as
- // b<4> b<3> b<2> 0 b<5>
-
- boolean lsb = (0x1 & num) != 0;
- if (lsb)
- num |= 0x20; // 10000b
-
- if ((num % 4) != 0)
- return null;
-
- return SPARCFloatRegisters.getRegister(num);
- }
-
- static SPARCRegister decode(int dataType, int regNum) {
- regNum &= 0x1F; // mask out all but lsb 5 bits
- SPARCRegister result = null;
- switch (dataType) {
- case RTLDT_FL_SINGLE:
- result = SPARCFloatRegisters.getRegister(regNum);
- break;
-
- case RTLDT_FL_DOUBLE:
- result = decodeDouble(regNum);
- break;
-
- case RTLDT_FL_QUAD:
- result = decodeQuad(regNum);
- break;
-
- case RTLDT_UNKNOWN:
- result = null;
- break;
-
- default: // some integer register
- result = SPARCRegisters.getRegister(regNum);
- break;
- }
- return result;
- }
-}