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comparison src/share/vm/opto/library_call.cpp @ 775:93c14e5562c4

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6823354: Add intrinsics for {Integer,Long}.{numberOfLeadingZeros,numberOfTrailingZeros}() Summary: These methods can be instrinsified by using bit scan, bit test, and population count instructions. Reviewed-by: kvn, never
author twisti
date Wed, 06 May 2009 00:27:52 -0700
parents 9c6be3edf0dc
children aabd393cf1ee
comparison
equal deleted inserted replaced
755:36ee9b69616e 775:93c14e5562c4
220 Node* dest, Node* dest_offset, 220 Node* dest, Node* dest_offset,
221 Node* copy_length); 221 Node* copy_length);
222 bool inline_unsafe_CAS(BasicType type); 222 bool inline_unsafe_CAS(BasicType type);
223 bool inline_unsafe_ordered_store(BasicType type); 223 bool inline_unsafe_ordered_store(BasicType type);
224 bool inline_fp_conversions(vmIntrinsics::ID id); 224 bool inline_fp_conversions(vmIntrinsics::ID id);
225 bool inline_numberOfLeadingZeros(vmIntrinsics::ID id);
226 bool inline_numberOfTrailingZeros(vmIntrinsics::ID id);
225 bool inline_bitCount(vmIntrinsics::ID id); 227 bool inline_bitCount(vmIntrinsics::ID id);
226 bool inline_reverseBytes(vmIntrinsics::ID id); 228 bool inline_reverseBytes(vmIntrinsics::ID id);
227 }; 229 };
228 230
229 231
627 case vmIntrinsics::_intBitsToFloat: 629 case vmIntrinsics::_intBitsToFloat:
628 case vmIntrinsics::_doubleToRawLongBits: 630 case vmIntrinsics::_doubleToRawLongBits:
629 case vmIntrinsics::_doubleToLongBits: 631 case vmIntrinsics::_doubleToLongBits:
630 case vmIntrinsics::_longBitsToDouble: 632 case vmIntrinsics::_longBitsToDouble:
631 return inline_fp_conversions(intrinsic_id()); 633 return inline_fp_conversions(intrinsic_id());
634
635 case vmIntrinsics::_numberOfLeadingZeros_i:
636 case vmIntrinsics::_numberOfLeadingZeros_l:
637 return inline_numberOfLeadingZeros(intrinsic_id());
638
639 case vmIntrinsics::_numberOfTrailingZeros_i:
640 case vmIntrinsics::_numberOfTrailingZeros_l:
641 return inline_numberOfTrailingZeros(intrinsic_id());
632 642
633 case vmIntrinsics::_bitCount_i: 643 case vmIntrinsics::_bitCount_i:
634 case vmIntrinsics::_bitCount_l: 644 case vmIntrinsics::_bitCount_l:
635 return inline_bitCount(intrinsic_id()); 645 return inline_bitCount(intrinsic_id());
636 646
1842 } else { 1852 } else {
1843 return basic_plus_adr(base, offset); 1853 return basic_plus_adr(base, offset);
1844 } 1854 }
1845 } 1855 }
1846 1856
1857 //-------------------inline_numberOfLeadingZeros_int/long-----------------------
1858 // inline int Integer.numberOfLeadingZeros(int)
1859 // inline int Long.numberOfLeadingZeros(long)
1860 bool LibraryCallKit::inline_numberOfLeadingZeros(vmIntrinsics::ID id) {
1861 assert(id == vmIntrinsics::_numberOfLeadingZeros_i || id == vmIntrinsics::_numberOfLeadingZeros_l, "not numberOfLeadingZeros");
1862 if (id == vmIntrinsics::_numberOfLeadingZeros_i && !Matcher::match_rule_supported(Op_CountLeadingZerosI)) return false;
1863 if (id == vmIntrinsics::_numberOfLeadingZeros_l && !Matcher::match_rule_supported(Op_CountLeadingZerosL)) return false;
1864 _sp += arg_size(); // restore stack pointer
1865 switch (id) {
1866 case vmIntrinsics::_numberOfLeadingZeros_i:
1867 push(_gvn.transform(new (C, 2) CountLeadingZerosINode(pop())));
1868 break;
1869 case vmIntrinsics::_numberOfLeadingZeros_l:
1870 push(_gvn.transform(new (C, 2) CountLeadingZerosLNode(pop_pair())));
1871 break;
1872 default:
1873 ShouldNotReachHere();
1874 }
1875 return true;
1876 }
1877
1878 //-------------------inline_numberOfTrailingZeros_int/long----------------------
1879 // inline int Integer.numberOfTrailingZeros(int)
1880 // inline int Long.numberOfTrailingZeros(long)
1881 bool LibraryCallKit::inline_numberOfTrailingZeros(vmIntrinsics::ID id) {
1882 assert(id == vmIntrinsics::_numberOfTrailingZeros_i || id == vmIntrinsics::_numberOfTrailingZeros_l, "not numberOfTrailingZeros");
1883 if (id == vmIntrinsics::_numberOfTrailingZeros_i && !Matcher::match_rule_supported(Op_CountTrailingZerosI)) return false;
1884 if (id == vmIntrinsics::_numberOfTrailingZeros_l && !Matcher::match_rule_supported(Op_CountTrailingZerosL)) return false;
1885 _sp += arg_size(); // restore stack pointer
1886 switch (id) {
1887 case vmIntrinsics::_numberOfTrailingZeros_i:
1888 push(_gvn.transform(new (C, 2) CountTrailingZerosINode(pop())));
1889 break;
1890 case vmIntrinsics::_numberOfTrailingZeros_l:
1891 push(_gvn.transform(new (C, 2) CountTrailingZerosLNode(pop_pair())));
1892 break;
1893 default:
1894 ShouldNotReachHere();
1895 }
1896 return true;
1897 }
1898
1847 //----------------------------inline_bitCount_int/long----------------------- 1899 //----------------------------inline_bitCount_int/long-----------------------
1848 // inline int Integer.bitCount(int) 1900 // inline int Integer.bitCount(int)
1849 // inline int Long.bitCount(long) 1901 // inline int Long.bitCount(long)
1850 bool LibraryCallKit::inline_bitCount(vmIntrinsics::ID id) { 1902 bool LibraryCallKit::inline_bitCount(vmIntrinsics::ID id) {
1851 assert(id == vmIntrinsics::_bitCount_i || id == vmIntrinsics::_bitCount_l, "not bitCount"); 1903 assert(id == vmIntrinsics::_bitCount_i || id == vmIntrinsics::_bitCount_l, "not bitCount");