/*
* Copyright ( c ) 2012 , 2013 , 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
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*/
/**
* @ test
* @ bug 8000805
* @ summary JMM issue : short loads are non - atomic
*
* @ run main / othervm - XX : + IgnoreUnrecognizedVMOptions - XX : - TieredCompilation - Xcomp
* - XX : + PrintCompilation
* - XX : CompileCommand = compileonly , compiler . c2 . Test8000805 : : load *
* compiler . c2 . Test8000805
*/
package compiler.c2;
public class Test8000805 {
static long loadS2LmaskFF (short [] sa) { return sa[0 ] & 0 xFF; }
static long _loadS2LmaskFF (short [] sa) { return sa[0 ] & 0 xFF; }
static long loadS2Lmask16 (short [] sa) { return sa[0 ] & 0 xFFFE; }
static long _loadS2Lmask16 (short [] sa) { return sa[0 ] & 0 xFFFE; }
static long loadS2Lmask13 (short [] sa) { return sa[0 ] & 0 x0FFF; }
static long _loadS2Lmask13 (short [] sa) { return sa[0 ] & 0 x0FFF; }
static int loadUS_signExt (char [] ca) { return (ca[0 ] << 16 ) >> 16 ; }
static int _loadUS_signExt (char [] ca) { return (ca[0 ] << 16 ) >> 16 ; }
static long loadB2L_mask8 (byte [] ba) { return ba[0 ] & 0 x55; }
static long _loadB2L_mask8 (byte [] ba) { return ba[0 ] & 0 x55; }
public static void main(String[] args) {
for (int i = Byte .MIN_VALUE; i < Byte .MAX_VALUE; i++) {
byte [] ba = new byte [] { (byte ) i};
{ long v1 = loadB2L_mask8(ba);
long v2 = _loadB2L_mask8(ba);
if (v1 != v2)
throw new InternalError(String.format("loadB2L_mask8 failed: %x != %x" , v1, v2)); }
}
for (int i = Short .MIN_VALUE; i < Short .MAX_VALUE; i++) {
short [] sa = new short [] { (short )i };
char [] ca = new char [] { (char )i };
{ long v1 = loadS2LmaskFF(sa);
long v2 = _loadS2LmaskFF(sa);
if (v1 != v2)
throw new InternalError(String.format("loadS2LmaskFF failed: %x != %x" , v1, v2)); }
{ long v1 = loadS2Lmask16(sa);
long v2 = _loadS2Lmask16(sa);
if (v1 != v2)
throw new InternalError(String.format("loadS2Lmask16 failed: %x != %x" , v1, v2)); }
{ long v1 = loadS2Lmask13(sa);
long v2 = _loadS2Lmask13(sa);
if (v1 != v2)
throw new InternalError(String.format("loadS2Lmask13 failed: %x != %x" , v1, v2)); }
{ int v1 = loadUS_signExt(ca);
int v2 = _loadUS_signExt(ca);
if (v1 != v2)
throw new InternalError(String.format("loadUS_signExt failed: %x != %x" , v1, v2)); }
}
System.out.println("TEST PASSED." );
}
}
Messung V0.5 in Prozent C=98 H=96 G=96
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-06-10)
¤
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