8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 5037596 27 * @summary Verify bitwise conversion works for non-canonical NaN values 28 * @author Joseph D. Darcy 29 */ 30 31 import static java.lang.Float.*; 32 import static sun.misc.FloatConsts.*; 33 34 public class BitwiseConversion { 35 static int testNanCase(int x) { 36 int errors = 0; 37 // Strip out sign and exponent bits 38 int y = x & SIGNIF_BIT_MASK; 39 40 float values[] = { 41 intBitsToFloat(EXP_BIT_MASK | y), 42 intBitsToFloat(SIGN_BIT_MASK | EXP_BIT_MASK | y) 43 }; 44 45 for(float value: values) { 46 if (!isNaN(value)) { 47 throw new RuntimeException("Invalid input " + y + 48 "yielded non-NaN" + value); 49 } 50 int converted = floatToIntBits(value); 51 if (converted != 0x7fc00000) { 52 errors++; 53 System.err.format("Non-canoncial NaN bits returned: %x%n", 54 converted); 55 } 56 } 57 return errors; 58 } 59 60 public static void main(String... argv) { 61 int errors = 0; 62 63 for (int i = 0; i < SIGNIFICAND_WIDTH-1; i++) { 64 errors += testNanCase(1<<i); 65 } 66 67 if (floatToIntBits(Float.POSITIVE_INFINITY) 68 != 0x7F800000) { 69 errors++; 70 System.err.println("Bad conversion for +infinity."); 71 } 72 73 if (floatToIntBits(Float.NEGATIVE_INFINITY) 74 != 0xFF800000) { 75 errors++; 76 System.err.println("Bad conversion for -infinity."); 77 } 78 79 if (errors > 0) 80 throw new RuntimeException(); 81 } 82 } | 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 5037596 27 * @summary Verify bitwise conversion works for non-canonical NaN values 28 * @library ../Math 29 * @build FloatConsts 30 * @run main BitwiseConversion 31 * @author Joseph D. Darcy 32 */ 33 34 import static java.lang.Float.*; 35 36 public class BitwiseConversion { 37 static int testNanCase(int x) { 38 int errors = 0; 39 // Strip out sign and exponent bits 40 int y = x & FloatConsts.SIGNIF_BIT_MASK; 41 42 float values[] = { 43 intBitsToFloat(FloatConsts.EXP_BIT_MASK | y), 44 intBitsToFloat(FloatConsts.SIGN_BIT_MASK | FloatConsts.EXP_BIT_MASK | y) 45 }; 46 47 for(float value: values) { 48 if (!isNaN(value)) { 49 throw new RuntimeException("Invalid input " + y + 50 "yielded non-NaN" + value); 51 } 52 int converted = floatToIntBits(value); 53 if (converted != 0x7fc00000) { 54 errors++; 55 System.err.format("Non-canoncial NaN bits returned: %x%n", 56 converted); 57 } 58 } 59 return errors; 60 } 61 62 public static void main(String... argv) { 63 int errors = 0; 64 65 for (int i = 0; i < FloatConsts.SIGNIFICAND_WIDTH-1; i++) { 66 errors += testNanCase(1<<i); 67 } 68 69 if (floatToIntBits(Float.POSITIVE_INFINITY) 70 != 0x7F800000) { 71 errors++; 72 System.err.println("Bad conversion for +infinity."); 73 } 74 75 if (floatToIntBits(Float.NEGATIVE_INFINITY) 76 != 0xFF800000) { 77 errors++; 78 System.err.println("Bad conversion for -infinity."); 79 } 80 81 if (errors > 0) 82 throw new RuntimeException(); 83 } 84 } |