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comparison src/cpu/sparc/vm/assembler_sparc.cpp @ 986:62001a362ce9

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6827605: new String intrinsics may prevent EA scalar replacement 6875866: Intrinsic for String.indexOf() is broken on x86 with SSE4.2 Summary: Modify String intrinsic methods to pass char[] pointers instead of string oops. Reviewed-by: never
author kvn
date Mon, 14 Sep 2009 12:14:20 -0700
parents df6caf649ff7
children dcf03e02b020
comparison
equal deleted inserted replaced
985:685e959d09ea 986:62001a362ce9
4674 // call indirectly to solve generation ordering problem 4674 // call indirectly to solve generation ordering problem
4675 AddressLiteral base(Universe::narrow_oop_base_addr()); 4675 AddressLiteral base(Universe::narrow_oop_base_addr());
4676 load_ptr_contents(base, G6_heapbase); 4676 load_ptr_contents(base, G6_heapbase);
4677 } 4677 }
4678 } 4678 }
4679
4680 // Compare char[] arrays aligned to 4 bytes.
4681 void MacroAssembler::char_arrays_equals(Register ary1, Register ary2,
4682 Register limit, Register result,
4683 Register chr1, Register chr2, Label& Ldone) {
4684 Label Lvector, Lloop;
4685 assert(chr1 == result, "should be the same");
4686
4687 // Note: limit contains number of bytes (2*char_elements) != 0.
4688 andcc(limit, 0x2, chr1); // trailing character ?
4689 br(Assembler::zero, false, Assembler::pt, Lvector);
4690 delayed()->nop();
4691
4692 // compare the trailing char
4693 sub(limit, sizeof(jchar), limit);
4694 lduh(ary1, limit, chr1);
4695 lduh(ary2, limit, chr2);
4696 cmp(chr1, chr2);
4697 br(Assembler::notEqual, true, Assembler::pt, Ldone);
4698 delayed()->mov(G0, result); // not equal
4699
4700 // only one char ?
4701 br_on_reg_cond(rc_z, true, Assembler::pn, limit, Ldone);
4702 delayed()->add(G0, 1, result); // zero-length arrays are equal
4703
4704 // word by word compare, dont't need alignment check
4705 bind(Lvector);
4706 // Shift ary1 and ary2 to the end of the arrays, negate limit
4707 add(ary1, limit, ary1);
4708 add(ary2, limit, ary2);
4709 neg(limit, limit);
4710
4711 lduw(ary1, limit, chr1);
4712 bind(Lloop);
4713 lduw(ary2, limit, chr2);
4714 cmp(chr1, chr2);
4715 br(Assembler::notEqual, true, Assembler::pt, Ldone);
4716 delayed()->mov(G0, result); // not equal
4717 inccc(limit, 2*sizeof(jchar));
4718 // annul LDUW if branch is not taken to prevent access past end of array
4719 br(Assembler::notZero, true, Assembler::pt, Lloop);
4720 delayed()->lduw(ary1, limit, chr1); // hoisted
4721
4722 // Caller should set it:
4723 // add(G0, 1, result); // equals
4724 }
4725