40 import org.graalvm.compiler.word.Word;
41
42 import jdk.vm.ci.meta.JavaKind;
43
44 // JaCoCo Exclude
45
46 /**
47 * Substitutions for {@link CRC32}.
48 */
49 @ClassSubstitution(CRC32.class)
50 public class CRC32Substitutions {
51
52 /**
53 * Gets the address of {@code StubRoutines::x86::_crc_table} in {@code stubRoutines_x86.hpp}.
54 */
55 @Fold
56 static long crcTableAddress(@InjectedParameter GraalHotSpotVMConfig config) {
57 return config.crcTableAddress;
58 }
59
60 @MethodSubstitution
61 static int update(int crc, int b) {
62 final long crcTableRawAddress = GraalHotSpotVMConfigNode.crcTableAddress();
63
64 int c = ~crc;
65 int index = (b ^ c) & 0xFF;
66 int offset = index << 2;
67 int result = Word.unsigned(crcTableRawAddress).readInt(offset);
68 result = result ^ (c >>> 8);
69 return ~result;
70 }
71
72 @MethodSubstitution
73 static int updateBytes(int crc, byte[] buf, int off, int len) {
74 Word bufAddr = Word.unsigned(ComputeObjectAddressNode.get(buf, arrayBaseOffset(JavaKind.Byte) + off));
75 return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len);
76 }
77
78 /**
79 * @since 9
80 */
81 @MethodSubstitution(optional = true)
82 static int updateBytes0(int crc, byte[] buf, int off, int len) {
83 Word bufAddr = Word.unsigned(ComputeObjectAddressNode.get(buf, arrayBaseOffset(JavaKind.Byte) + off));
84 return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len);
85 }
86
87 @MethodSubstitution
88 static int updateByteBuffer(int crc, long addr, int off, int len) {
89 Word bufAddr = Word.unsigned(addr).add(off);
90 return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len);
91 }
92
93 /**
94 * @since 9
95 */
96 @MethodSubstitution(optional = true)
97 static int updateByteBuffer0(int crc, long addr, int off, int len) {
98 Word bufAddr = Word.unsigned(addr).add(off);
99 return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len);
100 }
101
102 public static final ForeignCallDescriptor UPDATE_BYTES_CRC32 = new ForeignCallDescriptor("updateBytesCRC32", int.class, int.class, Word.class, int.class);
103
104 @NodeIntrinsic(ForeignCallNode.class)
105 public static native int updateBytesCRC32(@ConstantNodeParameter ForeignCallDescriptor descriptor, int crc, Word buf, int length);
106 }
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40 import org.graalvm.compiler.word.Word;
41
42 import jdk.vm.ci.meta.JavaKind;
43
44 // JaCoCo Exclude
45
46 /**
47 * Substitutions for {@link CRC32}.
48 */
49 @ClassSubstitution(CRC32.class)
50 public class CRC32Substitutions {
51
52 /**
53 * Gets the address of {@code StubRoutines::x86::_crc_table} in {@code stubRoutines_x86.hpp}.
54 */
55 @Fold
56 static long crcTableAddress(@InjectedParameter GraalHotSpotVMConfig config) {
57 return config.crcTableAddress;
58 }
59
60 @MethodSubstitution(optional = true)
61 static int update(int crc, int b) {
62 final long crcTableRawAddress = GraalHotSpotVMConfigNode.crcTableAddress();
63
64 int c = ~crc;
65 int index = (b ^ c) & 0xFF;
66 int offset = index << 2;
67 int result = Word.unsigned(crcTableRawAddress).readInt(offset);
68 result = result ^ (c >>> 8);
69 return ~result;
70 }
71
72 @MethodSubstitution(optional = true)
73 static int updateBytes(int crc, byte[] buf, int off, int len) {
74 Word bufAddr = Word.unsigned(ComputeObjectAddressNode.get(buf, arrayBaseOffset(JavaKind.Byte) + off));
75 return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len);
76 }
77
78 /**
79 * @since 9
80 */
81 @MethodSubstitution(optional = true)
82 static int updateBytes0(int crc, byte[] buf, int off, int len) {
83 Word bufAddr = Word.unsigned(ComputeObjectAddressNode.get(buf, arrayBaseOffset(JavaKind.Byte) + off));
84 return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len);
85 }
86
87 @MethodSubstitution(optional = true)
88 static int updateByteBuffer(int crc, long addr, int off, int len) {
89 Word bufAddr = Word.unsigned(addr).add(off);
90 return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len);
91 }
92
93 /**
94 * @since 9
95 */
96 @MethodSubstitution(optional = true)
97 static int updateByteBuffer0(int crc, long addr, int off, int len) {
98 Word bufAddr = Word.unsigned(addr).add(off);
99 return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len);
100 }
101
102 public static final ForeignCallDescriptor UPDATE_BYTES_CRC32 = new ForeignCallDescriptor("updateBytesCRC32", int.class, int.class, Word.class, int.class);
103
104 @NodeIntrinsic(ForeignCallNode.class)
105 public static native int updateBytesCRC32(@ConstantNodeParameter ForeignCallDescriptor descriptor, int crc, Word buf, int length);
106 }
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