--- a/hotspot/src/cpu/sparc/vm/sparc.ad Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/cpu/sparc/vm/sparc.ad Tue Mar 31 19:20:34 2009 -0700
@@ -3003,6 +3003,202 @@
__ bind(Ldone);
%}
+enc_class enc_String_Equals(o0RegP str1, o1RegP str2, g3RegP tmp1, g4RegP tmp2, notemp_iRegI result) %{
+ Label Lword, Lword_loop, Lpost_word, Lchar, Lchar_loop, Ldone;
+ MacroAssembler _masm(&cbuf);
+
+ Register str1_reg = reg_to_register_object($str1$$reg);
+ Register str2_reg = reg_to_register_object($str2$$reg);
+ Register tmp1_reg = reg_to_register_object($tmp1$$reg);
+ Register tmp2_reg = reg_to_register_object($tmp2$$reg);
+ Register result_reg = reg_to_register_object($result$$reg);
+
+ // Get the first character position in both strings
+ // [8] char array, [12] offset, [16] count
+ int value_offset = java_lang_String:: value_offset_in_bytes();
+ int offset_offset = java_lang_String::offset_offset_in_bytes();
+ int count_offset = java_lang_String:: count_offset_in_bytes();
+
+ // load str1 (jchar*) base address into tmp1_reg
+ __ load_heap_oop(Address(str1_reg, 0, value_offset), tmp1_reg);
+ __ ld(Address(str1_reg, 0, offset_offset), result_reg);
+ __ add(tmp1_reg, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp1_reg);
+ __ ld(Address(str1_reg, 0, count_offset), str1_reg); // hoisted
+ __ sll(result_reg, exact_log2(sizeof(jchar)), result_reg);
+ __ load_heap_oop(Address(str2_reg, 0, value_offset), tmp2_reg); // hoisted
+ __ add(result_reg, tmp1_reg, tmp1_reg);
+
+ // load str2 (jchar*) base address into tmp2_reg
+ // __ ld_ptr(Address(str2_reg, 0, value_offset), tmp2_reg); // hoisted
+ __ ld(Address(str2_reg, 0, offset_offset), result_reg);
+ __ add(tmp2_reg, arrayOopDesc::base_offset_in_bytes(T_CHAR), tmp2_reg);
+ __ ld(Address(str2_reg, 0, count_offset), str2_reg); // hoisted
+ __ sll(result_reg, exact_log2(sizeof(jchar)), result_reg);
+ __ cmp(str1_reg, str2_reg); // hoisted
+ __ add(result_reg, tmp2_reg, tmp2_reg);
+
+ __ sll(str1_reg, exact_log2(sizeof(jchar)), str1_reg);
+ __ br(Assembler::notEqual, true, Assembler::pt, Ldone);
+ __ delayed()->mov(G0, result_reg); // not equal
+
+ __ br_zero(Assembler::equal, true, Assembler::pn, str1_reg, Ldone);
+ __ delayed()->add(G0, 1, result_reg); //equals
+
+ __ cmp(tmp1_reg, tmp2_reg); //same string ?
+ __ brx(Assembler::equal, true, Assembler::pn, Ldone);
+ __ delayed()->add(G0, 1, result_reg);
+
+ //rename registers
+ Register limit_reg = str1_reg;
+ Register chr2_reg = str2_reg;
+ Register chr1_reg = result_reg;
+ // tmp{12} are the base pointers
+
+ //check for alignment and position the pointers to the ends
+ __ or3(tmp1_reg, tmp2_reg, chr1_reg);
+ __ andcc(chr1_reg, 0x3, chr1_reg); // notZero means at least one not 4-byte aligned
+ __ br(Assembler::notZero, false, Assembler::pn, Lchar);
+ __ delayed()->nop();
+
+ __ bind(Lword);
+ __ and3(limit_reg, 0x2, O7); //remember the remainder (either 0 or 2)
+ __ andn(limit_reg, 0x3, limit_reg);
+ __ br_zero(Assembler::zero, false, Assembler::pn, limit_reg, Lpost_word);
+ __ delayed()->nop();
+
+ __ add(tmp1_reg, limit_reg, tmp1_reg);
+ __ add(tmp2_reg, limit_reg, tmp2_reg);
+ __ neg(limit_reg);
+
+ __ lduw(tmp1_reg, limit_reg, chr1_reg);
+ __ bind(Lword_loop);
+ __ lduw(tmp2_reg, limit_reg, chr2_reg);
+ __ cmp(chr1_reg, chr2_reg);
+ __ br(Assembler::notEqual, true, Assembler::pt, Ldone);
+ __ delayed()->mov(G0, result_reg);
+ __ inccc(limit_reg, 2*sizeof(jchar));
+ // annul LDUW if branch i s not taken to prevent access past end of string
+ __ br(Assembler::notZero, true, Assembler::pt, Lword_loop); //annul on taken
+ __ delayed()->lduw(tmp1_reg, limit_reg, chr1_reg); // hoisted
+
+ __ bind(Lpost_word);
+ __ br_zero(Assembler::zero, true, Assembler::pt, O7, Ldone);
+ __ delayed()->add(G0, 1, result_reg);
+
+ __ lduh(tmp1_reg, 0, chr1_reg);
+ __ lduh(tmp2_reg, 0, chr2_reg);
+ __ cmp (chr1_reg, chr2_reg);
+ __ br(Assembler::notEqual, true, Assembler::pt, Ldone);
+ __ delayed()->mov(G0, result_reg);
+ __ ba(false,Ldone);
+ __ delayed()->add(G0, 1, result_reg);
+
+ __ bind(Lchar);
+ __ add(tmp1_reg, limit_reg, tmp1_reg);
+ __ add(tmp2_reg, limit_reg, tmp2_reg);
+ __ neg(limit_reg); //negate count
+
+ __ lduh(tmp1_reg, limit_reg, chr1_reg);
+ __ bind(Lchar_loop);
+ __ lduh(tmp2_reg, limit_reg, chr2_reg);
+ __ cmp(chr1_reg, chr2_reg);
+ __ br(Assembler::notEqual, true, Assembler::pt, Ldone);
+ __ delayed()->mov(G0, result_reg); //not equal
+ __ inccc(limit_reg, sizeof(jchar));
+ // annul LDUH if branch is not taken to prevent access past end of string
+ __ br(Assembler::notZero, true, Assembler::pt, Lchar_loop); //annul on taken
+ __ delayed()->lduh(tmp1_reg, limit_reg, chr1_reg); // hoisted
+
+ __ add(G0, 1, result_reg); //equal
+
+ __ bind(Ldone);
+ %}
+
+enc_class enc_Array_Equals(o0RegP ary1, o1RegP ary2, g3RegP tmp1, g4RegP tmp2, notemp_iRegI result) %{
+ Label Lvector, Ldone, Lloop;
+ MacroAssembler _masm(&cbuf);
+
+ Register ary1_reg = reg_to_register_object($ary1$$reg);
+ Register ary2_reg = reg_to_register_object($ary2$$reg);
+ Register tmp1_reg = reg_to_register_object($tmp1$$reg);
+ Register tmp2_reg = reg_to_register_object($tmp2$$reg);
+ Register result_reg = reg_to_register_object($result$$reg);
+
+ int length_offset = arrayOopDesc::length_offset_in_bytes();
+ int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR);
+
+ // return true if the same array
+ __ cmp(ary1_reg, ary2_reg);
+ __ br(Assembler::equal, true, Assembler::pn, Ldone);
+ __ delayed()->add(G0, 1, result_reg); // equal
+
+ __ br_null(ary1_reg, true, Assembler::pn, Ldone);
+ __ delayed()->mov(G0, result_reg); // not equal
+
+ __ br_null(ary2_reg, true, Assembler::pn, Ldone);
+ __ delayed()->mov(G0, result_reg); // not equal
+
+ //load the lengths of arrays
+ __ ld(Address(ary1_reg, 0, length_offset), tmp1_reg);
+ __ ld(Address(ary2_reg, 0, length_offset), tmp2_reg);
+
+ // return false if the two arrays are not equal length
+ __ cmp(tmp1_reg, tmp2_reg);
+ __ br(Assembler::notEqual, true, Assembler::pn, Ldone);
+ __ delayed()->mov(G0, result_reg); // not equal
+
+ __ br_zero(Assembler::zero, true, Assembler::pn, tmp1_reg, Ldone);
+ __ delayed()->add(G0, 1, result_reg); // zero-length arrays are equal
+
+ // load array addresses
+ __ add(ary1_reg, base_offset, ary1_reg);
+ __ add(ary2_reg, base_offset, ary2_reg);
+
+ // renaming registers
+ Register chr1_reg = tmp2_reg; // for characters in ary1
+ Register chr2_reg = result_reg; // for characters in ary2
+ Register limit_reg = tmp1_reg; // length
+
+ // set byte count
+ __ sll(limit_reg, exact_log2(sizeof(jchar)), limit_reg);
+ __ andcc(limit_reg, 0x2, chr1_reg); //trailing character ?
+ __ br(Assembler::zero, false, Assembler::pt, Lvector);
+ __ delayed()->nop();
+
+ //compare the trailing char
+ __ sub(limit_reg, sizeof(jchar), limit_reg);
+ __ lduh(ary1_reg, limit_reg, chr1_reg);
+ __ lduh(ary2_reg, limit_reg, chr2_reg);
+ __ cmp(chr1_reg, chr2_reg);
+ __ br(Assembler::notEqual, true, Assembler::pt, Ldone);
+ __ delayed()->mov(G0, result_reg); // not equal
+
+ // only one char ?
+ __ br_zero(Assembler::zero, true, Assembler::pn, limit_reg, Ldone);
+ __ delayed()->add(G0, 1, result_reg); // zero-length arrays are equal
+
+ __ bind(Lvector);
+ // Shift ary1_reg and ary2_reg to the end of the arrays, negate limit
+ __ add(ary1_reg, limit_reg, ary1_reg);
+ __ add(ary2_reg, limit_reg, ary2_reg);
+ __ neg(limit_reg, limit_reg);
+
+ __ lduw(ary1_reg, limit_reg, chr1_reg);
+ __ bind(Lloop);
+ __ lduw(ary2_reg, limit_reg, chr2_reg);
+ __ cmp(chr1_reg, chr2_reg);
+ __ br(Assembler::notEqual, false, Assembler::pt, Ldone);
+ __ delayed()->mov(G0, result_reg); // not equal
+ __ inccc(limit_reg, 2*sizeof(jchar));
+ // annul LDUW if branch is not taken to prevent access past end of string
+ __ br(Assembler::notZero, true, Assembler::pt, Lloop); //annul on taken
+ __ delayed()->lduw(ary1_reg, limit_reg, chr1_reg); // hoisted
+
+ __ add(G0, 1, result_reg); // equals
+
+ __ bind(Ldone);
+ %}
+
enc_class enc_rethrow() %{
cbuf.set_inst_mark();
Register temp_reg = G3;
@@ -9015,6 +9211,25 @@
ins_pipe(long_memory_op);
%}
+instruct string_equals(o0RegP str1, o1RegP str2, g3RegP tmp1, g4RegP tmp2, notemp_iRegI result,
+ o7RegI tmp3, flagsReg ccr) %{
+ match(Set result (StrEquals str1 str2));
+ effect(USE_KILL str1, USE_KILL str2, KILL tmp1, KILL tmp2, KILL ccr, KILL tmp3);
+ ins_cost(300);
+ format %{ "String Equals $str1,$str2 -> $result" %}
+ ins_encode( enc_String_Equals(str1, str2, tmp1, tmp2, result) );
+ ins_pipe(long_memory_op);
+%}
+
+instruct array_equals(o0RegP ary1, o1RegP ary2, g3RegP tmp1, g4RegP tmp2, notemp_iRegI result,
+ flagsReg ccr) %{
+ match(Set result (AryEq ary1 ary2));
+ effect(USE_KILL ary1, USE_KILL ary2, KILL tmp1, KILL tmp2, KILL ccr);
+ ins_cost(300);
+ format %{ "Array Equals $ary1,$ary2 -> $result" %}
+ ins_encode( enc_Array_Equals(ary1, ary2, tmp1, tmp2, result));
+ ins_pipe(long_memory_op);
+%}
//---------- Population Count Instructions -------------------------------------
--- a/hotspot/src/cpu/x86/vm/assembler_x86.cpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/cpu/x86/vm/assembler_x86.cpp Tue Mar 31 19:20:34 2009 -0700
@@ -2173,6 +2173,31 @@
emit_arith(0x0B, 0xC0, dst, src);
}
+void Assembler::pcmpestri(XMMRegister dst, Address src, int imm8) {
+ assert(VM_Version::supports_sse4_2(), "");
+
+ InstructionMark im(this);
+ emit_byte(0x66);
+ prefix(src, dst);
+ emit_byte(0x0F);
+ emit_byte(0x3A);
+ emit_byte(0x61);
+ emit_operand(dst, src);
+ emit_byte(imm8);
+}
+
+void Assembler::pcmpestri(XMMRegister dst, XMMRegister src, int imm8) {
+ assert(VM_Version::supports_sse4_2(), "");
+
+ emit_byte(0x66);
+ int encode = prefixq_and_encode(dst->encoding(), src->encoding());
+ emit_byte(0x0F);
+ emit_byte(0x3A);
+ emit_byte(0x61);
+ emit_byte(0xC0 | encode);
+ emit_byte(imm8);
+}
+
// generic
void Assembler::pop(Register dst) {
int encode = prefix_and_encode(dst->encoding());
@@ -2330,6 +2355,29 @@
emit_byte(shift);
}
+void Assembler::ptest(XMMRegister dst, Address src) {
+ assert(VM_Version::supports_sse4_1(), "");
+
+ InstructionMark im(this);
+ emit_byte(0x66);
+ prefix(src, dst);
+ emit_byte(0x0F);
+ emit_byte(0x38);
+ emit_byte(0x17);
+ emit_operand(dst, src);
+}
+
+void Assembler::ptest(XMMRegister dst, XMMRegister src) {
+ assert(VM_Version::supports_sse4_1(), "");
+
+ emit_byte(0x66);
+ int encode = prefixq_and_encode(dst->encoding(), src->encoding());
+ emit_byte(0x0F);
+ emit_byte(0x38);
+ emit_byte(0x17);
+ emit_byte(0xC0 | encode);
+}
+
void Assembler::punpcklbw(XMMRegister dst, XMMRegister src) {
NOT_LP64(assert(VM_Version::supports_sse2(), ""));
emit_byte(0x66);
--- a/hotspot/src/cpu/x86/vm/assembler_x86.hpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/cpu/x86/vm/assembler_x86.hpp Tue Mar 31 19:20:34 2009 -0700
@@ -1226,6 +1226,10 @@
void orq(Register dst, Address src);
void orq(Register dst, Register src);
+ // SSE4.2 string instructions
+ void pcmpestri(XMMRegister xmm1, XMMRegister xmm2, int imm8);
+ void pcmpestri(XMMRegister xmm1, Address src, int imm8);
+
void popl(Address dst);
#ifdef _LP64
@@ -1260,6 +1264,10 @@
// Shift Right Logical Quadword Immediate
void psrlq(XMMRegister dst, int shift);
+ // Logical Compare Double Quadword
+ void ptest(XMMRegister dst, XMMRegister src);
+ void ptest(XMMRegister dst, Address src);
+
// Interleave Low Bytes
void punpcklbw(XMMRegister dst, XMMRegister src);
--- a/hotspot/src/cpu/x86/vm/vm_version_x86.cpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/cpu/x86/vm/vm_version_x86.cpp Tue Mar 31 19:20:34 2009 -0700
@@ -408,6 +408,11 @@
UseUnalignedLoadStores = true; // use movdqu on newest Intel cpus
}
}
+ if( supports_sse4_2() && UseSSE >= 4 ) {
+ if( FLAG_IS_DEFAULT(UseSSE42Intrinsics)) {
+ UseSSE42Intrinsics = true;
+ }
+ }
}
}
--- a/hotspot/src/cpu/x86/vm/x86_32.ad Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/cpu/x86/vm/x86_32.ad Tue Mar 31 19:20:34 2009 -0700
@@ -3694,12 +3694,16 @@
}
%}
- enc_class enc_String_Compare() %{
+ enc_class enc_String_Compare(eDIRegP str1, eSIRegP str2, regXD tmp1, regXD tmp2,
+ eAXRegI tmp3, eBXRegI tmp4, eCXRegI result) %{
Label ECX_GOOD_LABEL, LENGTH_DIFF_LABEL,
POP_LABEL, DONE_LABEL, CONT_LABEL,
WHILE_HEAD_LABEL;
MacroAssembler masm(&cbuf);
+ XMMRegister tmp1Reg = as_XMMRegister($tmp1$$reg);
+ XMMRegister tmp2Reg = as_XMMRegister($tmp2$$reg);
+
// Get the first character position in both strings
// [8] char array, [12] offset, [16] count
int value_offset = java_lang_String::value_offset_in_bytes();
@@ -3717,7 +3721,6 @@
// Compute the minimum of the string lengths(rsi) and the
// difference of the string lengths (stack)
-
if (VM_Version::supports_cmov()) {
masm.movl(rdi, Address(rdi, count_offset));
masm.movl(rsi, Address(rsi, count_offset));
@@ -3731,7 +3734,7 @@
masm.movl(rsi, rdi);
masm.subl(rdi, rcx);
masm.push(rdi);
- masm.jcc(Assembler::lessEqual, ECX_GOOD_LABEL);
+ masm.jccb(Assembler::lessEqual, ECX_GOOD_LABEL);
masm.movl(rsi, rcx);
// rsi holds min, rcx is unused
}
@@ -3756,7 +3759,7 @@
Label LSkip2;
// Check if the strings start at same location
masm.cmpptr(rbx,rax);
- masm.jcc(Assembler::notEqual, LSkip2);
+ masm.jccb(Assembler::notEqual, LSkip2);
// Check if the length difference is zero (from stack)
masm.cmpl(Address(rsp, 0), 0x0);
@@ -3766,9 +3769,52 @@
masm.bind(LSkip2);
}
- // Shift rax, and rbx, to the end of the arrays, negate min
- masm.lea(rax, Address(rax, rsi, Address::times_2, 2));
- masm.lea(rbx, Address(rbx, rsi, Address::times_2, 2));
+ // Advance to next character
+ masm.addptr(rax, 2);
+ masm.addptr(rbx, 2);
+
+ if (UseSSE42Intrinsics) {
+ // With SSE4.2, use double quad vector compare
+ Label COMPARE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_TAIL;
+ // Setup to compare 16-byte vectors
+ masm.movl(rdi, rsi);
+ masm.andl(rsi, 0xfffffff8); // rsi holds the vector count
+ masm.andl(rdi, 0x00000007); // rdi holds the tail count
+ masm.testl(rsi, rsi);
+ masm.jccb(Assembler::zero, COMPARE_TAIL);
+
+ masm.lea(rax, Address(rax, rsi, Address::times_2));
+ masm.lea(rbx, Address(rbx, rsi, Address::times_2));
+ masm.negl(rsi);
+
+ masm.bind(COMPARE_VECTORS);
+ masm.movdqu(tmp1Reg, Address(rax, rsi, Address::times_2));
+ masm.movdqu(tmp2Reg, Address(rbx, rsi, Address::times_2));
+ masm.pxor(tmp1Reg, tmp2Reg);
+ masm.ptest(tmp1Reg, tmp1Reg);
+ masm.jccb(Assembler::notZero, VECTOR_NOT_EQUAL);
+ masm.addl(rsi, 8);
+ masm.jcc(Assembler::notZero, COMPARE_VECTORS);
+ masm.jmpb(COMPARE_TAIL);
+
+ // Mismatched characters in the vectors
+ masm.bind(VECTOR_NOT_EQUAL);
+ masm.lea(rax, Address(rax, rsi, Address::times_2));
+ masm.lea(rbx, Address(rbx, rsi, Address::times_2));
+ masm.movl(rdi, 8);
+
+ // Compare tail (< 8 chars), or rescan last vectors to
+ // find 1st mismatched characters
+ masm.bind(COMPARE_TAIL);
+ masm.testl(rdi, rdi);
+ masm.jccb(Assembler::zero, LENGTH_DIFF_LABEL);
+ masm.movl(rsi, rdi);
+ // Fallthru to tail compare
+ }
+
+ //Shift rax, and rbx, to the end of the arrays, negate min
+ masm.lea(rax, Address(rax, rsi, Address::times_2, 0));
+ masm.lea(rbx, Address(rbx, rsi, Address::times_2, 0));
masm.negl(rsi);
// Compare the rest of the characters
@@ -3776,93 +3822,329 @@
masm.load_unsigned_short(rcx, Address(rbx, rsi, Address::times_2, 0));
masm.load_unsigned_short(rdi, Address(rax, rsi, Address::times_2, 0));
masm.subl(rcx, rdi);
- masm.jcc(Assembler::notZero, POP_LABEL);
+ masm.jccb(Assembler::notZero, POP_LABEL);
masm.incrementl(rsi);
masm.jcc(Assembler::notZero, WHILE_HEAD_LABEL);
// Strings are equal up to min length. Return the length difference.
masm.bind(LENGTH_DIFF_LABEL);
masm.pop(rcx);
- masm.jmp(DONE_LABEL);
+ masm.jmpb(DONE_LABEL);
// Discard the stored length difference
masm.bind(POP_LABEL);
masm.addptr(rsp, 4);
-
+
// That's it
masm.bind(DONE_LABEL);
%}
- enc_class enc_Array_Equals(eDIRegP ary1, eSIRegP ary2, eAXRegI tmp1, eBXRegI tmp2, eCXRegI result) %{
- Label TRUE_LABEL, FALSE_LABEL, DONE_LABEL, COMPARE_LOOP_HDR, COMPARE_LOOP;
+ enc_class enc_String_Equals(eDIRegP str1, eSIRegP str2, regXD tmp1, regXD tmp2,
+ eBXRegI tmp3, eCXRegI tmp4, eAXRegI result) %{
+ Label RET_TRUE, RET_FALSE, DONE, COMPARE_VECTORS, COMPARE_CHAR;
+ MacroAssembler masm(&cbuf);
+
+ XMMRegister tmp1Reg = as_XMMRegister($tmp1$$reg);
+ XMMRegister tmp2Reg = as_XMMRegister($tmp2$$reg);
+
+ int value_offset = java_lang_String::value_offset_in_bytes();
+ int offset_offset = java_lang_String::offset_offset_in_bytes();
+ int count_offset = java_lang_String::count_offset_in_bytes();
+ int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR);
+
+ // does source == target string?
+ masm.cmpptr(rdi, rsi);
+ masm.jcc(Assembler::equal, RET_TRUE);
+
+ // get and compare counts
+ masm.movl(rcx, Address(rdi, count_offset));
+ masm.movl(rax, Address(rsi, count_offset));
+ masm.cmpl(rcx, rax);
+ masm.jcc(Assembler::notEqual, RET_FALSE);
+ masm.testl(rax, rax);
+ masm.jcc(Assembler::zero, RET_TRUE);
+
+ // get source string offset and value
+ masm.movptr(rbx, Address(rsi, value_offset));
+ masm.movl(rax, Address(rsi, offset_offset));
+ masm.leal(rsi, Address(rbx, rax, Address::times_2, base_offset));
+
+ // get compare string offset and value
+ masm.movptr(rbx, Address(rdi, value_offset));
+ masm.movl(rax, Address(rdi, offset_offset));
+ masm.leal(rdi, Address(rbx, rax, Address::times_2, base_offset));
+
+ // Set byte count
+ masm.shll(rcx, 1);
+ masm.movl(rax, rcx);
+
+ if (UseSSE42Intrinsics) {
+ // With SSE4.2, use double quad vector compare
+ Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
+ // Compare 16-byte vectors
+ masm.andl(rcx, 0xfffffff0); // vector count (in bytes)
+ masm.andl(rax, 0x0000000e); // tail count (in bytes)
+ masm.testl(rcx, rcx);
+ masm.jccb(Assembler::zero, COMPARE_TAIL);
+ masm.lea(rdi, Address(rdi, rcx, Address::times_1));
+ masm.lea(rsi, Address(rsi, rcx, Address::times_1));
+ masm.negl(rcx);
+
+ masm.bind(COMPARE_WIDE_VECTORS);
+ masm.movdqu(tmp1Reg, Address(rdi, rcx, Address::times_1));
+ masm.movdqu(tmp2Reg, Address(rsi, rcx, Address::times_1));
+ masm.pxor(tmp1Reg, tmp2Reg);
+ masm.ptest(tmp1Reg, tmp1Reg);
+ masm.jccb(Assembler::notZero, RET_FALSE);
+ masm.addl(rcx, 16);
+ masm.jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
+ masm.bind(COMPARE_TAIL);
+ masm.movl(rcx, rax);
+ // Fallthru to tail compare
+ }
+
+ // Compare 4-byte vectors
+ masm.andl(rcx, 0xfffffffc); // vector count (in bytes)
+ masm.andl(rax, 0x00000002); // tail char (in bytes)
+ masm.testl(rcx, rcx);
+ masm.jccb(Assembler::zero, COMPARE_CHAR);
+ masm.lea(rdi, Address(rdi, rcx, Address::times_1));
+ masm.lea(rsi, Address(rsi, rcx, Address::times_1));
+ masm.negl(rcx);
+
+ masm.bind(COMPARE_VECTORS);
+ masm.movl(rbx, Address(rdi, rcx, Address::times_1));
+ masm.cmpl(rbx, Address(rsi, rcx, Address::times_1));
+ masm.jccb(Assembler::notEqual, RET_FALSE);
+ masm.addl(rcx, 4);
+ masm.jcc(Assembler::notZero, COMPARE_VECTORS);
+
+ // Compare trailing char (final 2 bytes), if any
+ masm.bind(COMPARE_CHAR);
+ masm.testl(rax, rax);
+ masm.jccb(Assembler::zero, RET_TRUE);
+ masm.load_unsigned_short(rbx, Address(rdi, 0));
+ masm.load_unsigned_short(rcx, Address(rsi, 0));
+ masm.cmpl(rbx, rcx);
+ masm.jccb(Assembler::notEqual, RET_FALSE);
+
+ masm.bind(RET_TRUE);
+ masm.movl(rax, 1); // return true
+ masm.jmpb(DONE);
+
+ masm.bind(RET_FALSE);
+ masm.xorl(rax, rax); // return false
+
+ masm.bind(DONE);
+ %}
+
+ enc_class enc_String_IndexOf(eSIRegP str1, eDIRegP str2, regXD tmp1, eAXRegI tmp2,
+ eCXRegI tmp3, eDXRegI tmp4, eBXRegI result) %{
+ // SSE4.2 version
+ Label LOAD_SUBSTR, PREP_FOR_SCAN, SCAN_TO_SUBSTR,
+ SCAN_SUBSTR, RET_NEG_ONE, RET_NOT_FOUND, CLEANUP, DONE;
MacroAssembler masm(&cbuf);
- Register ary1Reg = as_Register($ary1$$reg);
- Register ary2Reg = as_Register($ary2$$reg);
- Register tmp1Reg = as_Register($tmp1$$reg);
- Register tmp2Reg = as_Register($tmp2$$reg);
- Register resultReg = as_Register($result$$reg);
+ XMMRegister tmp1Reg = as_XMMRegister($tmp1$$reg);
+
+ // Get the first character position in both strings
+ // [8] char array, [12] offset, [16] count
+ int value_offset = java_lang_String::value_offset_in_bytes();
+ int offset_offset = java_lang_String::offset_offset_in_bytes();
+ int count_offset = java_lang_String::count_offset_in_bytes();
+ int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR);
+
+ // Get counts for string and substr
+ masm.movl(rdx, Address(rsi, count_offset));
+ masm.movl(rax, Address(rdi, count_offset));
+ // Check for substr count > string count
+ masm.cmpl(rax, rdx);
+ masm.jcc(Assembler::greater, RET_NEG_ONE);
+
+ // Start the indexOf operation
+ // Get start addr of string
+ masm.movptr(rbx, Address(rsi, value_offset));
+ masm.movl(rcx, Address(rsi, offset_offset));
+ masm.lea(rsi, Address(rbx, rcx, Address::times_2, base_offset));
+ masm.push(rsi);
+
+ // Get start addr of substr
+ masm.movptr(rbx, Address(rdi, value_offset));
+ masm.movl(rcx, Address(rdi, offset_offset));
+ masm.lea(rdi, Address(rbx, rcx, Address::times_2, base_offset));
+ masm.push(rdi);
+ masm.push(rax);
+ masm.jmpb(PREP_FOR_SCAN);
+
+ // Substr count saved at sp
+ // Substr saved at sp+4
+ // String saved at sp+8
+
+ // Prep to load substr for scan
+ masm.bind(LOAD_SUBSTR);
+ masm.movptr(rdi, Address(rsp, 4));
+ masm.movl(rax, Address(rsp, 0));
+
+ // Load substr
+ masm.bind(PREP_FOR_SCAN);
+ masm.movdqu(tmp1Reg, Address(rdi, 0));
+ masm.addl(rdx, 8); // prime the loop
+ masm.subptr(rsi, 16);
+
+ // Scan string for substr in 16-byte vectors
+ masm.bind(SCAN_TO_SUBSTR);
+ masm.subl(rdx, 8);
+ masm.addptr(rsi, 16);
+ masm.pcmpestri(tmp1Reg, Address(rsi, 0), 0x0d);
+ masm.jcc(Assembler::above, SCAN_TO_SUBSTR); // CF == 0 && ZF == 0
+ masm.jccb(Assembler::aboveEqual, RET_NOT_FOUND); // CF == 0
+
+ // Fallthru: found a potential substr
+
+ // Make sure string is still long enough
+ masm.subl(rdx, rcx);
+ masm.cmpl(rdx, rax);
+ masm.jccb(Assembler::negative, RET_NOT_FOUND);
+ // Compute start addr of substr
+ masm.lea(rsi, Address(rsi, rcx, Address::times_2));
+ masm.movptr(rbx, rsi);
+
+ // Compare potential substr
+ masm.addl(rdx, 8); // prime the loop
+ masm.addl(rax, 8);
+ masm.subptr(rsi, 16);
+ masm.subptr(rdi, 16);
+
+ // Scan 16-byte vectors of string and substr
+ masm.bind(SCAN_SUBSTR);
+ masm.subl(rax, 8);
+ masm.subl(rdx, 8);
+ masm.addptr(rsi, 16);
+ masm.addptr(rdi, 16);
+ masm.movdqu(tmp1Reg, Address(rdi, 0));
+ masm.pcmpestri(tmp1Reg, Address(rsi, 0), 0x0d);
+ masm.jcc(Assembler::noOverflow, LOAD_SUBSTR); // OF == 0
+ masm.jcc(Assembler::positive, SCAN_SUBSTR); // SF == 0
+
+ // Compute substr offset
+ masm.movptr(rsi, Address(rsp, 8));
+ masm.subptr(rbx, rsi);
+ masm.shrl(rbx, 1);
+ masm.jmpb(CLEANUP);
+
+ masm.bind(RET_NEG_ONE);
+ masm.movl(rbx, -1);
+ masm.jmpb(DONE);
+
+ masm.bind(RET_NOT_FOUND);
+ masm.movl(rbx, -1);
+
+ masm.bind(CLEANUP);
+ masm.addptr(rsp, 12);
+
+ masm.bind(DONE);
+ %}
+
+ enc_class enc_Array_Equals(eDIRegP ary1, eSIRegP ary2, regXD tmp1, regXD tmp2,
+ eBXRegI tmp3, eDXRegI tmp4, eAXRegI result) %{
+ Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_VECTORS, COMPARE_CHAR;
+ MacroAssembler masm(&cbuf);
+
+ XMMRegister tmp1Reg = as_XMMRegister($tmp1$$reg);
+ XMMRegister tmp2Reg = as_XMMRegister($tmp2$$reg);
+ Register ary1Reg = as_Register($ary1$$reg);
+ Register ary2Reg = as_Register($ary2$$reg);
+ Register tmp3Reg = as_Register($tmp3$$reg);
+ Register tmp4Reg = as_Register($tmp4$$reg);
+ Register resultReg = as_Register($result$$reg);
int length_offset = arrayOopDesc::length_offset_in_bytes();
int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR);
// Check the input args
- masm.cmpl(ary1Reg, ary2Reg);
+ masm.cmpptr(ary1Reg, ary2Reg);
masm.jcc(Assembler::equal, TRUE_LABEL);
- masm.testl(ary1Reg, ary1Reg);
+ masm.testptr(ary1Reg, ary1Reg);
masm.jcc(Assembler::zero, FALSE_LABEL);
- masm.testl(ary2Reg, ary2Reg);
+ masm.testptr(ary2Reg, ary2Reg);
masm.jcc(Assembler::zero, FALSE_LABEL);
// Check the lengths
- masm.movl(tmp2Reg, Address(ary1Reg, length_offset));
+ masm.movl(tmp4Reg, Address(ary1Reg, length_offset));
masm.movl(resultReg, Address(ary2Reg, length_offset));
- masm.cmpl(tmp2Reg, resultReg);
+ masm.cmpl(tmp4Reg, resultReg);
masm.jcc(Assembler::notEqual, FALSE_LABEL);
masm.testl(resultReg, resultReg);
masm.jcc(Assembler::zero, TRUE_LABEL);
- // Get the number of 4 byte vectors to compare
- masm.shrl(resultReg, 1);
-
- // Check for odd-length arrays
- masm.andl(tmp2Reg, 1);
- masm.testl(tmp2Reg, tmp2Reg);
- masm.jcc(Assembler::zero, COMPARE_LOOP_HDR);
-
- // Compare 2-byte "tail" at end of arrays
- masm.load_unsigned_short(tmp1Reg, Address(ary1Reg, resultReg, Address::times_4, base_offset));
- masm.load_unsigned_short(tmp2Reg, Address(ary2Reg, resultReg, Address::times_4, base_offset));
- masm.cmpl(tmp1Reg, tmp2Reg);
- masm.jcc(Assembler::notEqual, FALSE_LABEL);
+ // Load array addrs
+ masm.lea(ary1Reg, Address(ary1Reg, base_offset));
+ masm.lea(ary2Reg, Address(ary2Reg, base_offset));
+
+ // Set byte count
+ masm.shll(tmp4Reg, 1);
+ masm.movl(resultReg, tmp4Reg);
+
+ if (UseSSE42Intrinsics) {
+ // With SSE4.2, use double quad vector compare
+ Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
+ // Compare 16-byte vectors
+ masm.andl(tmp4Reg, 0xfffffff0); // vector count (in bytes)
+ masm.andl(resultReg, 0x0000000e); // tail count (in bytes)
+ masm.testl(tmp4Reg, tmp4Reg);
+ masm.jccb(Assembler::zero, COMPARE_TAIL);
+ masm.lea(ary1Reg, Address(ary1Reg, tmp4Reg, Address::times_1));
+ masm.lea(ary2Reg, Address(ary2Reg, tmp4Reg, Address::times_1));
+ masm.negl(tmp4Reg);
+
+ masm.bind(COMPARE_WIDE_VECTORS);
+ masm.movdqu(tmp1Reg, Address(ary1Reg, tmp4Reg, Address::times_1));
+ masm.movdqu(tmp2Reg, Address(ary2Reg, tmp4Reg, Address::times_1));
+ masm.pxor(tmp1Reg, tmp2Reg);
+ masm.ptest(tmp1Reg, tmp1Reg);
+
+ masm.jccb(Assembler::notZero, FALSE_LABEL);
+ masm.addl(tmp4Reg, 16);
+ masm.jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
+ masm.bind(COMPARE_TAIL);
+ masm.movl(tmp4Reg, resultReg);
+ // Fallthru to tail compare
+ }
+
+ // Compare 4-byte vectors
+ masm.andl(tmp4Reg, 0xfffffffc); // vector count (in bytes)
+ masm.andl(resultReg, 0x00000002); // tail char (in bytes)
+ masm.testl(tmp4Reg, tmp4Reg);
+ masm.jccb(Assembler::zero, COMPARE_CHAR);
+ masm.lea(ary1Reg, Address(ary1Reg, tmp4Reg, Address::times_1));
+ masm.lea(ary2Reg, Address(ary2Reg, tmp4Reg, Address::times_1));
+ masm.negl(tmp4Reg);
+
+ masm.bind(COMPARE_VECTORS);
+ masm.movl(tmp3Reg, Address(ary1Reg, tmp4Reg, Address::times_1));
+ masm.cmpl(tmp3Reg, Address(ary2Reg, tmp4Reg, Address::times_1));
+ masm.jccb(Assembler::notEqual, FALSE_LABEL);
+ masm.addl(tmp4Reg, 4);
+ masm.jcc(Assembler::notZero, COMPARE_VECTORS);
+
+ // Compare trailing char (final 2 bytes), if any
+ masm.bind(COMPARE_CHAR);
masm.testl(resultReg, resultReg);
- masm.jcc(Assembler::zero, TRUE_LABEL);
-
- // Setup compare loop
- masm.bind(COMPARE_LOOP_HDR);
- // Shift tmp1Reg and tmp2Reg to the last 4-byte boundary of the arrays
- masm.leal(tmp1Reg, Address(ary1Reg, resultReg, Address::times_4, base_offset));
- masm.leal(tmp2Reg, Address(ary2Reg, resultReg, Address::times_4, base_offset));
- masm.negl(resultReg);
-
- // 4-byte-wide compare loop
- masm.bind(COMPARE_LOOP);
- masm.movl(ary1Reg, Address(tmp1Reg, resultReg, Address::times_4, 0));
- masm.movl(ary2Reg, Address(tmp2Reg, resultReg, Address::times_4, 0));
- masm.cmpl(ary1Reg, ary2Reg);
- masm.jcc(Assembler::notEqual, FALSE_LABEL);
- masm.increment(resultReg);
- masm.jcc(Assembler::notZero, COMPARE_LOOP);
+ masm.jccb(Assembler::zero, TRUE_LABEL);
+ masm.load_unsigned_short(tmp3Reg, Address(ary1Reg, 0));
+ masm.load_unsigned_short(tmp4Reg, Address(ary2Reg, 0));
+ masm.cmpl(tmp3Reg, tmp4Reg);
+ masm.jccb(Assembler::notEqual, FALSE_LABEL);
masm.bind(TRUE_LABEL);
masm.movl(resultReg, 1); // return true
- masm.jmp(DONE_LABEL);
+ masm.jmpb(DONE);
masm.bind(FALSE_LABEL);
masm.xorl(resultReg, resultReg); // return false
// That's it
- masm.bind(DONE_LABEL);
+ masm.bind(DONE);
%}
enc_class enc_pop_rdx() %{
@@ -12074,11 +12356,8 @@
ins_pipe( fpu_reg_reg );
%}
-
-
// =======================================================================
// fast clearing of an array
-
instruct rep_stos(eCXRegI cnt, eDIRegP base, eAXRegI zero, Universe dummy, eFlagsReg cr) %{
match(Set dummy (ClearArray cnt base));
effect(USE_KILL cnt, USE_KILL base, KILL zero, KILL cr);
@@ -12092,24 +12371,48 @@
ins_pipe( pipe_slow );
%}
-instruct string_compare(eDIRegP str1, eSIRegP str2, eAXRegI tmp1, eBXRegI tmp2, eCXRegI result, eFlagsReg cr) %{
+instruct string_compare(eDIRegP str1, eSIRegP str2, regXD tmp1, regXD tmp2,
+ eAXRegI tmp3, eBXRegI tmp4, eCXRegI result, eFlagsReg cr) %{
match(Set result (StrComp str1 str2));
- effect(USE_KILL str1, USE_KILL str2, KILL tmp1, KILL tmp2, KILL cr);
+ effect(TEMP tmp1, TEMP tmp2, USE_KILL str1, USE_KILL str2, KILL tmp3, KILL tmp4, KILL cr);
//ins_cost(300);
format %{ "String Compare $str1,$str2 -> $result // KILL EAX, EBX" %}
- ins_encode( enc_String_Compare() );
+ ins_encode( enc_String_Compare(str1, str2, tmp1, tmp2, tmp3, tmp4, result) );
+ ins_pipe( pipe_slow );
+%}
+
+// fast string equals
+instruct string_equals(eDIRegP str1, eSIRegP str2, regXD tmp1, regXD tmp2,
+ eBXRegI tmp3, eCXRegI tmp4, eAXRegI result, eFlagsReg cr) %{
+ match(Set result (StrEquals str1 str2));
+ effect(TEMP tmp1, TEMP tmp2, USE_KILL str1, USE_KILL str2, KILL tmp3, KILL tmp4, KILL cr);
+
+ format %{ "String Equals $str1,$str2 -> $result // KILL EBX, ECX" %}
+ ins_encode( enc_String_Equals(tmp1, tmp2, str1, str2, tmp3, tmp4, result) );
+ ins_pipe( pipe_slow );
+%}
+
+instruct string_indexof(eSIRegP str1, eDIRegP str2, regXD tmp1, eAXRegI tmp2,
+ eCXRegI tmp3, eDXRegI tmp4, eBXRegI result, eFlagsReg cr) %{
+ predicate(UseSSE42Intrinsics);
+ match(Set result (StrIndexOf str1 str2));
+ effect(TEMP tmp1, USE_KILL str1, USE_KILL str2, KILL tmp2, KILL tmp3, KILL tmp4, KILL cr);
+
+ format %{ "String IndexOf $str1,$str2 -> $result // KILL EAX, ECX, EDX" %}
+ ins_encode( enc_String_IndexOf(str1, str2, tmp1, tmp2, tmp3, tmp4, result) );
ins_pipe( pipe_slow );
%}
// fast array equals
-instruct array_equals(eDIRegP ary1, eSIRegP ary2, eAXRegI tmp1, eBXRegI tmp2, eCXRegI result, eFlagsReg cr) %{
+instruct array_equals(eDIRegP ary1, eSIRegP ary2, regXD tmp1, regXD tmp2, eBXRegI tmp3,
+ eDXRegI tmp4, eAXRegI result, eFlagsReg cr) %{
match(Set result (AryEq ary1 ary2));
- effect(USE_KILL ary1, USE_KILL ary2, KILL tmp1, KILL tmp2, KILL cr);
+ effect(TEMP tmp1, TEMP tmp2, USE_KILL ary1, USE_KILL ary2, KILL tmp3, KILL tmp4, KILL cr);
//ins_cost(300);
- format %{ "Array Equals $ary1,$ary2 -> $result // KILL EAX, EBX" %}
- ins_encode( enc_Array_Equals(ary1, ary2, tmp1, tmp2, result) );
+ format %{ "Array Equals $ary1,$ary2 -> $result // KILL EBX, EDX" %}
+ ins_encode( enc_Array_Equals(ary1, ary2, tmp1, tmp2, tmp3, tmp4, result) );
ins_pipe( pipe_slow );
%}
--- a/hotspot/src/cpu/x86/vm/x86_64.ad Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/cpu/x86/vm/x86_64.ad Tue Mar 31 19:20:34 2009 -0700
@@ -3694,13 +3694,16 @@
}
%}
- enc_class enc_String_Compare()
- %{
+ enc_class enc_String_Compare(rdi_RegP str1, rsi_RegP str2, regD tmp1, regD tmp2,
+ rax_RegI tmp3, rbx_RegI tmp4, rcx_RegI result) %{
Label RCX_GOOD_LABEL, LENGTH_DIFF_LABEL,
POP_LABEL, DONE_LABEL, CONT_LABEL,
WHILE_HEAD_LABEL;
MacroAssembler masm(&cbuf);
+ XMMRegister tmp1Reg = as_XMMRegister($tmp1$$reg);
+ XMMRegister tmp2Reg = as_XMMRegister($tmp2$$reg);
+
// Get the first character position in both strings
// [8] char array, [12] offset, [16] count
int value_offset = java_lang_String::value_offset_in_bytes();
@@ -3718,6 +3721,7 @@
// Compute the minimum of the string lengths(rsi) and the
// difference of the string lengths (stack)
+ // do the conditional move stuff
masm.movl(rdi, Address(rdi, count_offset));
masm.movl(rsi, Address(rsi, count_offset));
masm.movl(rcx, rdi);
@@ -3745,7 +3749,7 @@
Label LSkip2;
// Check if the strings start at same location
masm.cmpptr(rbx, rax);
- masm.jcc(Assembler::notEqual, LSkip2);
+ masm.jccb(Assembler::notEqual, LSkip2);
// Check if the length difference is zero (from stack)
masm.cmpl(Address(rsp, 0), 0x0);
@@ -3755,9 +3759,52 @@
masm.bind(LSkip2);
}
+ // Advance to next character
+ masm.addptr(rax, 2);
+ masm.addptr(rbx, 2);
+
+ if (UseSSE42Intrinsics) {
+ // With SSE4.2, use double quad vector compare
+ Label COMPARE_VECTORS, VECTOR_NOT_EQUAL, COMPARE_TAIL;
+ // Setup to compare 16-byte vectors
+ masm.movl(rdi, rsi);
+ masm.andl(rsi, 0xfffffff8); // rsi holds the vector count
+ masm.andl(rdi, 0x00000007); // rdi holds the tail count
+ masm.testl(rsi, rsi);
+ masm.jccb(Assembler::zero, COMPARE_TAIL);
+
+ masm.lea(rax, Address(rax, rsi, Address::times_2));
+ masm.lea(rbx, Address(rbx, rsi, Address::times_2));
+ masm.negptr(rsi);
+
+ masm.bind(COMPARE_VECTORS);
+ masm.movdqu(tmp1Reg, Address(rax, rsi, Address::times_2));
+ masm.movdqu(tmp2Reg, Address(rbx, rsi, Address::times_2));
+ masm.pxor(tmp1Reg, tmp2Reg);
+ masm.ptest(tmp1Reg, tmp1Reg);
+ masm.jccb(Assembler::notZero, VECTOR_NOT_EQUAL);
+ masm.addptr(rsi, 8);
+ masm.jcc(Assembler::notZero, COMPARE_VECTORS);
+ masm.jmpb(COMPARE_TAIL);
+
+ // Mismatched characters in the vectors
+ masm.bind(VECTOR_NOT_EQUAL);
+ masm.lea(rax, Address(rax, rsi, Address::times_2));
+ masm.lea(rbx, Address(rbx, rsi, Address::times_2));
+ masm.movl(rdi, 8);
+
+ // Compare tail (< 8 chars), or rescan last vectors to
+ // find 1st mismatched characters
+ masm.bind(COMPARE_TAIL);
+ masm.testl(rdi, rdi);
+ masm.jccb(Assembler::zero, LENGTH_DIFF_LABEL);
+ masm.movl(rsi, rdi);
+ // Fallthru to tail compare
+ }
+
// Shift RAX and RBX to the end of the arrays, negate min
- masm.lea(rax, Address(rax, rsi, Address::times_2, 2));
- masm.lea(rbx, Address(rbx, rsi, Address::times_2, 2));
+ masm.lea(rax, Address(rax, rsi, Address::times_2, 0));
+ masm.lea(rbx, Address(rbx, rsi, Address::times_2, 0));
masm.negptr(rsi);
// Compare the rest of the characters
@@ -3765,93 +3812,329 @@
masm.load_unsigned_short(rcx, Address(rbx, rsi, Address::times_2, 0));
masm.load_unsigned_short(rdi, Address(rax, rsi, Address::times_2, 0));
masm.subl(rcx, rdi);
- masm.jcc(Assembler::notZero, POP_LABEL);
+ masm.jccb(Assembler::notZero, POP_LABEL);
masm.increment(rsi);
masm.jcc(Assembler::notZero, WHILE_HEAD_LABEL);
// Strings are equal up to min length. Return the length difference.
masm.bind(LENGTH_DIFF_LABEL);
masm.pop(rcx);
- masm.jmp(DONE_LABEL);
+ masm.jmpb(DONE_LABEL);
// Discard the stored length difference
masm.bind(POP_LABEL);
masm.addptr(rsp, 8);
-
+
// That's it
masm.bind(DONE_LABEL);
%}
- enc_class enc_Array_Equals(rdi_RegP ary1, rsi_RegP ary2, rax_RegI tmp1, rbx_RegI tmp2, rcx_RegI result) %{
- Label TRUE_LABEL, FALSE_LABEL, DONE_LABEL, COMPARE_LOOP_HDR, COMPARE_LOOP;
+ enc_class enc_String_IndexOf(rsi_RegP str1, rdi_RegP str2, regD tmp1, rax_RegI tmp2,
+ rcx_RegI tmp3, rdx_RegI tmp4, rbx_RegI result) %{
+ // SSE4.2 version
+ Label LOAD_SUBSTR, PREP_FOR_SCAN, SCAN_TO_SUBSTR,
+ SCAN_SUBSTR, RET_NEG_ONE, RET_NOT_FOUND, CLEANUP, DONE;
MacroAssembler masm(&cbuf);
- Register ary1Reg = as_Register($ary1$$reg);
- Register ary2Reg = as_Register($ary2$$reg);
- Register tmp1Reg = as_Register($tmp1$$reg);
- Register tmp2Reg = as_Register($tmp2$$reg);
- Register resultReg = as_Register($result$$reg);
+ XMMRegister tmp1Reg = as_XMMRegister($tmp1$$reg);
+
+ // Get the first character position in both strings
+ // [8] char array, [12] offset, [16] count
+ int value_offset = java_lang_String::value_offset_in_bytes();
+ int offset_offset = java_lang_String::offset_offset_in_bytes();
+ int count_offset = java_lang_String::count_offset_in_bytes();
+ int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR);
+
+ // Get counts for string and substr
+ masm.movl(rdx, Address(rsi, count_offset));
+ masm.movl(rax, Address(rdi, count_offset));
+ // Check for substr count > string count
+ masm.cmpl(rax, rdx);
+ masm.jcc(Assembler::greater, RET_NEG_ONE);
+
+ // Start the indexOf operation
+ // Get start addr of string
+ masm.load_heap_oop(rbx, Address(rsi, value_offset));
+ masm.movl(rcx, Address(rsi, offset_offset));
+ masm.lea(rsi, Address(rbx, rcx, Address::times_2, base_offset));
+ masm.push(rsi);
+
+ // Get start addr of substr
+ masm.load_heap_oop(rbx, Address(rdi, value_offset));
+ masm.movl(rcx, Address(rdi, offset_offset));
+ masm.lea(rdi, Address(rbx, rcx, Address::times_2, base_offset));
+ masm.push(rdi);
+ masm.push(rax);
+ masm.jmpb(PREP_FOR_SCAN);
+
+ // Substr count saved at sp
+ // Substr saved at sp+8
+ // String saved at sp+16
+
+ // Prep to load substr for scan
+ masm.bind(LOAD_SUBSTR);
+ masm.movptr(rdi, Address(rsp, 8));
+ masm.movl(rax, Address(rsp, 0));
+
+ // Load substr
+ masm.bind(PREP_FOR_SCAN);
+ masm.movdqu(tmp1Reg, Address(rdi, 0));
+ masm.addq(rdx, 8); // prime the loop
+ masm.subptr(rsi, 16);
+
+ // Scan string for substr in 16-byte vectors
+ masm.bind(SCAN_TO_SUBSTR);
+ masm.subq(rdx, 8);
+ masm.addptr(rsi, 16);
+ masm.pcmpestri(tmp1Reg, Address(rsi, 0), 0x0d);
+ masm.jcc(Assembler::above, SCAN_TO_SUBSTR);
+ masm.jccb(Assembler::aboveEqual, RET_NOT_FOUND);
+
+ // Fallthru: found a potential substr
+
+ //Make sure string is still long enough
+ masm.subl(rdx, rcx);
+ masm.cmpl(rdx, rax);
+ masm.jccb(Assembler::negative, RET_NOT_FOUND);
+ // Compute start addr of substr
+ masm.lea(rsi, Address(rsi, rcx, Address::times_2));
+ masm.movptr(rbx, rsi);
+
+ // Compare potential substr
+ masm.addq(rdx, 8); // prime the loop
+ masm.addq(rax, 8);
+ masm.subptr(rsi, 16);
+ masm.subptr(rdi, 16);
+
+ // Scan 16-byte vectors of string and substr
+ masm.bind(SCAN_SUBSTR);
+ masm.subq(rax, 8);
+ masm.subq(rdx, 8);
+ masm.addptr(rsi, 16);
+ masm.addptr(rdi, 16);
+ masm.movdqu(tmp1Reg, Address(rdi, 0));
+ masm.pcmpestri(tmp1Reg, Address(rsi, 0), 0x0d);
+ masm.jcc(Assembler::noOverflow, LOAD_SUBSTR); // OF == 0
+ masm.jcc(Assembler::positive, SCAN_SUBSTR); // SF == 0
+
+ // Compute substr offset
+ masm.movptr(rsi, Address(rsp, 16));
+ masm.subptr(rbx, rsi);
+ masm.shrl(rbx, 1);
+ masm.jmpb(CLEANUP);
+
+ masm.bind(RET_NEG_ONE);
+ masm.movl(rbx, -1);
+ masm.jmpb(DONE);
+
+ masm.bind(RET_NOT_FOUND);
+ masm.movl(rbx, -1);
+
+ masm.bind(CLEANUP);
+ masm.addptr(rsp, 24);
+
+ masm.bind(DONE);
+ %}
+
+ enc_class enc_String_Equals(rdi_RegP str1, rsi_RegP str2, regD tmp1, regD tmp2,
+ rbx_RegI tmp3, rcx_RegI tmp2, rax_RegI result) %{
+ Label RET_TRUE, RET_FALSE, DONE, COMPARE_VECTORS, COMPARE_CHAR;
+ MacroAssembler masm(&cbuf);
+
+ XMMRegister tmp1Reg = as_XMMRegister($tmp1$$reg);
+ XMMRegister tmp2Reg = as_XMMRegister($tmp2$$reg);
+
+ int value_offset = java_lang_String::value_offset_in_bytes();
+ int offset_offset = java_lang_String::offset_offset_in_bytes();
+ int count_offset = java_lang_String::count_offset_in_bytes();
+ int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR);
+
+ // does source == target string?
+ masm.cmpptr(rdi, rsi);
+ masm.jcc(Assembler::equal, RET_TRUE);
+
+ // get and compare counts
+ masm.movl(rcx, Address(rdi, count_offset));
+ masm.movl(rax, Address(rsi, count_offset));
+ masm.cmpl(rcx, rax);
+ masm.jcc(Assembler::notEqual, RET_FALSE);
+ masm.testl(rax, rax);
+ masm.jcc(Assembler::zero, RET_TRUE);
+
+ // get source string offset and value
+ masm.load_heap_oop(rbx, Address(rsi, value_offset));
+ masm.movl(rax, Address(rsi, offset_offset));
+ masm.lea(rsi, Address(rbx, rax, Address::times_2, base_offset));
+
+ // get compare string offset and value
+ masm.load_heap_oop(rbx, Address(rdi, value_offset));
+ masm.movl(rax, Address(rdi, offset_offset));
+ masm.lea(rdi, Address(rbx, rax, Address::times_2, base_offset));
+
+ // Set byte count
+ masm.shll(rcx, 1);
+ masm.movl(rax, rcx);
+
+ if (UseSSE42Intrinsics) {
+ // With SSE4.2, use double quad vector compare
+ Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
+ // Compare 16-byte vectors
+ masm.andl(rcx, 0xfffffff0); // vector count (in bytes)
+ masm.andl(rax, 0x0000000e); // tail count (in bytes)
+ masm.testl(rcx, rcx);
+ masm.jccb(Assembler::zero, COMPARE_TAIL);
+ masm.lea(rdi, Address(rdi, rcx, Address::times_1));
+ masm.lea(rsi, Address(rsi, rcx, Address::times_1));
+ masm.negptr(rcx);
+
+ masm.bind(COMPARE_WIDE_VECTORS);
+ masm.movdqu(tmp1Reg, Address(rdi, rcx, Address::times_1));
+ masm.movdqu(tmp2Reg, Address(rsi, rcx, Address::times_1));
+ masm.pxor(tmp1Reg, tmp2Reg);
+ masm.ptest(tmp1Reg, tmp1Reg);
+ masm.jccb(Assembler::notZero, RET_FALSE);
+ masm.addptr(rcx, 16);
+ masm.jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
+ masm.bind(COMPARE_TAIL);
+ masm.movl(rcx, rax);
+ // Fallthru to tail compare
+ }
+
+ // Compare 4-byte vectors
+ masm.andl(rcx, 0xfffffffc); // vector count (in bytes)
+ masm.andl(rax, 0x00000002); // tail char (in bytes)
+ masm.testl(rcx, rcx);
+ masm.jccb(Assembler::zero, COMPARE_CHAR);
+ masm.lea(rdi, Address(rdi, rcx, Address::times_1));
+ masm.lea(rsi, Address(rsi, rcx, Address::times_1));
+ masm.negptr(rcx);
+
+ masm.bind(COMPARE_VECTORS);
+ masm.movl(rbx, Address(rdi, rcx, Address::times_1));
+ masm.cmpl(rbx, Address(rsi, rcx, Address::times_1));
+ masm.jccb(Assembler::notEqual, RET_FALSE);
+ masm.addptr(rcx, 4);
+ masm.jcc(Assembler::notZero, COMPARE_VECTORS);
+
+ // Compare trailing char (final 2 bytes), if any
+ masm.bind(COMPARE_CHAR);
+ masm.testl(rax, rax);
+ masm.jccb(Assembler::zero, RET_TRUE);
+ masm.load_unsigned_short(rbx, Address(rdi, 0));
+ masm.load_unsigned_short(rcx, Address(rsi, 0));
+ masm.cmpl(rbx, rcx);
+ masm.jccb(Assembler::notEqual, RET_FALSE);
+
+ masm.bind(RET_TRUE);
+ masm.movl(rax, 1); // return true
+ masm.jmpb(DONE);
+
+ masm.bind(RET_FALSE);
+ masm.xorl(rax, rax); // return false
+
+ masm.bind(DONE);
+ %}
+
+ enc_class enc_Array_Equals(rdi_RegP ary1, rsi_RegP ary2, regD tmp1, regD tmp2,
+ rax_RegI tmp3, rbx_RegI tmp4, rcx_RegI result) %{
+ Label TRUE_LABEL, FALSE_LABEL, DONE, COMPARE_VECTORS, COMPARE_CHAR;
+ MacroAssembler masm(&cbuf);
+
+ XMMRegister tmp1Reg = as_XMMRegister($tmp1$$reg);
+ XMMRegister tmp2Reg = as_XMMRegister($tmp2$$reg);
+ Register ary1Reg = as_Register($ary1$$reg);
+ Register ary2Reg = as_Register($ary2$$reg);
+ Register tmp3Reg = as_Register($tmp3$$reg);
+ Register tmp4Reg = as_Register($tmp4$$reg);
+ Register resultReg = as_Register($result$$reg);
int length_offset = arrayOopDesc::length_offset_in_bytes();
int base_offset = arrayOopDesc::base_offset_in_bytes(T_CHAR);
// Check the input args
- masm.cmpq(ary1Reg, ary2Reg);
+ masm.cmpq(ary1Reg, ary2Reg);
masm.jcc(Assembler::equal, TRUE_LABEL);
- masm.testq(ary1Reg, ary1Reg);
+ masm.testq(ary1Reg, ary1Reg);
masm.jcc(Assembler::zero, FALSE_LABEL);
- masm.testq(ary2Reg, ary2Reg);
+ masm.testq(ary2Reg, ary2Reg);
masm.jcc(Assembler::zero, FALSE_LABEL);
// Check the lengths
- masm.movl(tmp2Reg, Address(ary1Reg, length_offset));
+ masm.movl(tmp4Reg, Address(ary1Reg, length_offset));
masm.movl(resultReg, Address(ary2Reg, length_offset));
- masm.cmpl(tmp2Reg, resultReg);
+ masm.cmpl(tmp4Reg, resultReg);
masm.jcc(Assembler::notEqual, FALSE_LABEL);
masm.testl(resultReg, resultReg);
masm.jcc(Assembler::zero, TRUE_LABEL);
- // Get the number of 4 byte vectors to compare
- masm.shrl(resultReg, 1);
-
- // Check for odd-length arrays
- masm.andl(tmp2Reg, 1);
- masm.testl(tmp2Reg, tmp2Reg);
- masm.jcc(Assembler::zero, COMPARE_LOOP_HDR);
-
- // Compare 2-byte "tail" at end of arrays
- masm.load_unsigned_short(tmp1Reg, Address(ary1Reg, resultReg, Address::times_4, base_offset));
- masm.load_unsigned_short(tmp2Reg, Address(ary2Reg, resultReg, Address::times_4, base_offset));
- masm.cmpl(tmp1Reg, tmp2Reg);
- masm.jcc(Assembler::notEqual, FALSE_LABEL);
+ //load array address
+ masm.lea(ary1Reg, Address(ary1Reg, base_offset));
+ masm.lea(ary2Reg, Address(ary2Reg, base_offset));
+
+ //set byte count
+ masm.shll(tmp4Reg, 1);
+ masm.movl(resultReg,tmp4Reg);
+
+ if (UseSSE42Intrinsics){
+ // With SSE4.2, use double quad vector compare
+ Label COMPARE_WIDE_VECTORS, COMPARE_TAIL;
+ // Compare 16-byte vectors
+ masm.andl(tmp4Reg, 0xfffffff0); // vector count (in bytes)
+ masm.andl(resultReg, 0x0000000e); // tail count (in bytes)
+ masm.testl(tmp4Reg, tmp4Reg);
+ masm.jccb(Assembler::zero, COMPARE_TAIL);
+ masm.lea(ary1Reg, Address(ary1Reg, tmp4Reg, Address::times_1));
+ masm.lea(ary2Reg, Address(ary2Reg, tmp4Reg, Address::times_1));
+ masm.negptr(tmp4Reg);
+
+ masm.bind(COMPARE_WIDE_VECTORS);
+ masm.movdqu(tmp1Reg, Address(ary1Reg, tmp4Reg, Address::times_1));
+ masm.movdqu(tmp2Reg, Address(ary2Reg, tmp4Reg, Address::times_1));
+ masm.pxor(tmp1Reg, tmp2Reg);
+ masm.ptest(tmp1Reg, tmp1Reg);
+
+ masm.jccb(Assembler::notZero, FALSE_LABEL);
+ masm.addptr(tmp4Reg, 16);
+ masm.jcc(Assembler::notZero, COMPARE_WIDE_VECTORS);
+ masm.bind(COMPARE_TAIL);
+ masm.movl(tmp4Reg, resultReg);
+ // Fallthru to tail compare
+ }
+
+ // Compare 4-byte vectors
+ masm.andl(tmp4Reg, 0xfffffffc); // vector count (in bytes)
+ masm.andl(resultReg, 0x00000002); // tail char (in bytes)
+ masm.testl(tmp4Reg, tmp4Reg); //if tmp2 == 0, only compare char
+ masm.jccb(Assembler::zero, COMPARE_CHAR);
+ masm.lea(ary1Reg, Address(ary1Reg, tmp4Reg, Address::times_1));
+ masm.lea(ary2Reg, Address(ary2Reg, tmp4Reg, Address::times_1));
+ masm.negptr(tmp4Reg);
+
+ masm.bind(COMPARE_VECTORS);
+ masm.movl(tmp3Reg, Address(ary1Reg, tmp4Reg, Address::times_1));
+ masm.cmpl(tmp3Reg, Address(ary2Reg, tmp4Reg, Address::times_1));
+ masm.jccb(Assembler::notEqual, FALSE_LABEL);
+ masm.addptr(tmp4Reg, 4);
+ masm.jcc(Assembler::notZero, COMPARE_VECTORS);
+
+ // Compare trailing char (final 2 bytes), if any
+ masm.bind(COMPARE_CHAR);
masm.testl(resultReg, resultReg);
- masm.jcc(Assembler::zero, TRUE_LABEL);
-
- // Setup compare loop
- masm.bind(COMPARE_LOOP_HDR);
- // Shift tmp1Reg and tmp2Reg to the last 4-byte boundary of the arrays
- masm.leaq(tmp1Reg, Address(ary1Reg, resultReg, Address::times_4, base_offset));
- masm.leaq(tmp2Reg, Address(ary2Reg, resultReg, Address::times_4, base_offset));
- masm.negq(resultReg);
-
- // 4-byte-wide compare loop
- masm.bind(COMPARE_LOOP);
- masm.movl(ary1Reg, Address(tmp1Reg, resultReg, Address::times_4, 0));
- masm.movl(ary2Reg, Address(tmp2Reg, resultReg, Address::times_4, 0));
- masm.cmpl(ary1Reg, ary2Reg);
- masm.jcc(Assembler::notEqual, FALSE_LABEL);
- masm.incrementq(resultReg);
- masm.jcc(Assembler::notZero, COMPARE_LOOP);
+ masm.jccb(Assembler::zero, TRUE_LABEL);
+ masm.load_unsigned_short(tmp3Reg, Address(ary1Reg, 0));
+ masm.load_unsigned_short(tmp4Reg, Address(ary2Reg, 0));
+ masm.cmpl(tmp3Reg, tmp4Reg);
+ masm.jccb(Assembler::notEqual, FALSE_LABEL);
masm.bind(TRUE_LABEL);
masm.movl(resultReg, 1); // return true
- masm.jmp(DONE_LABEL);
+ masm.jmpb(DONE);
masm.bind(FALSE_LABEL);
masm.xorl(resultReg, resultReg); // return false
// That's it
- masm.bind(DONE_LABEL);
+ masm.bind(DONE);
%}
enc_class enc_rethrow()
@@ -5087,7 +5370,7 @@
%}
// Double register operands
-operand regD()
+operand regD()
%{
constraint(ALLOC_IN_RC(double_reg));
match(RegD);
@@ -11540,27 +11823,52 @@
ins_pipe(pipe_slow);
%}
-instruct string_compare(rdi_RegP str1, rsi_RegP str2, rax_RegI tmp1,
- rbx_RegI tmp2, rcx_RegI result, rFlagsReg cr)
+instruct string_compare(rdi_RegP str1, rsi_RegP str2, regD tmp1, regD tmp2,
+ rax_RegI tmp3, rbx_RegI tmp4, rcx_RegI result, rFlagsReg cr)
%{
match(Set result (StrComp str1 str2));
- effect(USE_KILL str1, USE_KILL str2, KILL tmp1, KILL tmp2, KILL cr);
+ effect(TEMP tmp1, TEMP tmp2, USE_KILL str1, USE_KILL str2, KILL tmp3, KILL tmp4, KILL cr);
//ins_cost(300);
format %{ "String Compare $str1, $str2 -> $result // XXX KILL RAX, RBX" %}
- ins_encode( enc_String_Compare() );
+ ins_encode( enc_String_Compare(str1, str2, tmp1, tmp2, tmp3, tmp4, result) );
+ ins_pipe( pipe_slow );
+%}
+
+instruct string_indexof(rsi_RegP str1, rdi_RegP str2, regD tmp1, rax_RegI tmp2,
+ rcx_RegI tmp3, rdx_RegI tmp4, rbx_RegI result, rFlagsReg cr)
+%{
+ predicate(UseSSE42Intrinsics);
+ match(Set result (StrIndexOf str1 str2));
+ effect(TEMP tmp1, USE_KILL str1, USE_KILL str2, KILL tmp2, KILL tmp3, KILL tmp4, KILL cr);
+
+ format %{ "String IndexOf $str1,$str2 -> $result // KILL RAX, RCX, RDX" %}
+ ins_encode( enc_String_IndexOf(str1, str2, tmp1, tmp2, tmp3, tmp4, result) );
+ ins_pipe( pipe_slow );
+%}
+
+// fast string equals
+instruct string_equals(rdi_RegP str1, rsi_RegP str2, regD tmp1, regD tmp2, rbx_RegI tmp3,
+ rcx_RegI tmp4, rax_RegI result, rFlagsReg cr)
+%{
+ match(Set result (StrEquals str1 str2));
+ effect(TEMP tmp1, TEMP tmp2, USE_KILL str1, USE_KILL str2, KILL tmp3, KILL tmp4, KILL cr);
+
+ format %{ "String Equals $str1,$str2 -> $result // KILL RBX, RCX" %}
+ ins_encode( enc_String_Equals(str1, str2, tmp1, tmp2, tmp3, tmp4, result) );
ins_pipe( pipe_slow );
%}
// fast array equals
-instruct array_equals(rdi_RegP ary1, rsi_RegP ary2, rax_RegI tmp1,
- rbx_RegI tmp2, rcx_RegI result, rFlagsReg cr) %{
+instruct array_equals(rdi_RegP ary1, rsi_RegP ary2, regD tmp1, regD tmp2, rax_RegI tmp3,
+ rbx_RegI tmp4, rcx_RegI result, rFlagsReg cr)
+%{
match(Set result (AryEq ary1 ary2));
- effect(USE_KILL ary1, USE_KILL ary2, KILL tmp1, KILL tmp2, KILL cr);
+ effect(TEMP tmp1, TEMP tmp2, USE_KILL ary1, USE_KILL ary2, KILL tmp3, KILL tmp4, KILL cr);
//ins_cost(300);
- format %{ "Array Equals $ary1,$ary2 -> $result // KILL RAX, RBX" %}
- ins_encode( enc_Array_Equals(ary1, ary2, tmp1, tmp2, result) );
+ format %{ "Array Equals $ary1,$ary2 -> $result // KILL RAX, RBX" %}
+ ins_encode( enc_Array_Equals(ary1, ary2, tmp1, tmp2, tmp3, tmp4, result) );
ins_pipe( pipe_slow );
%}
--- a/hotspot/src/share/vm/adlc/formssel.cpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/adlc/formssel.cpp Tue Mar 31 19:20:34 2009 -0700
@@ -574,9 +574,13 @@
// TEMPORARY
// if( is_simple_chain_rule(globals) ) return false;
- // String-compare uses many memorys edges, but writes none
+ // String.(compareTo/equals/indexOf) and Arrays.equals use many memorys edges,
+ // but writes none
if( _matrule && _matrule->_rChild &&
- strcmp(_matrule->_rChild->_opType,"StrComp")==0 )
+ ( strcmp(_matrule->_rChild->_opType,"StrComp" )==0 ||
+ strcmp(_matrule->_rChild->_opType,"StrEquals" )==0 ||
+ strcmp(_matrule->_rChild->_opType,"StrIndexOf" )==0 ||
+ strcmp(_matrule->_rChild->_opType,"AryEq" )==0 ))
return true;
// Check if instruction has a USE of a memory operand class, but no defs
@@ -815,8 +819,10 @@
return AdlcVMDeps::Parms; // Skip the machine-state edges
if( _matrule->_rChild &&
- strcmp(_matrule->_rChild->_opType,"StrComp")==0 ) {
- // String compare takes 1 control and 4 memory edges.
+ ( strcmp(_matrule->_rChild->_opType,"StrComp" )==0 ||
+ strcmp(_matrule->_rChild->_opType,"StrEquals" )==0 ||
+ strcmp(_matrule->_rChild->_opType,"StrIndexOf")==0 )) {
+ // String.(compareTo/equals/indexOf) take 1 control and 4 memory edges.
return 5;
}
--- a/hotspot/src/share/vm/classfile/vmSymbols.hpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/classfile/vmSymbols.hpp Tue Mar 31 19:20:34 2009 -0700
@@ -288,6 +288,7 @@
template(stringCacheEnabled_name, "stringCacheEnabled") \
template(bitCount_name, "bitCount") \
template(profile_name, "profile") \
+ template(equals_name, "equals") \
\
/* non-intrinsic name/signature pairs: */ \
template(register_method_name, "register") \
@@ -579,7 +580,6 @@
do_signature(copyOfRange_signature, "([Ljava/lang/Object;IILjava/lang/Class;)[Ljava/lang/Object;") \
\
do_intrinsic(_equalsC, java_util_Arrays, equals_name, equalsC_signature, F_S) \
- do_name( equals_name, "equals") \
do_signature(equalsC_signature, "([C[C)Z") \
\
do_intrinsic(_invoke, java_lang_reflect_Method, invoke_name, object_array_object_object_signature, F_R) \
@@ -589,6 +589,7 @@
do_name( compareTo_name, "compareTo") \
do_intrinsic(_indexOf, java_lang_String, indexOf_name, string_int_signature, F_R) \
do_name( indexOf_name, "indexOf") \
+ do_intrinsic(_equals, java_lang_String, equals_name, object_boolean_signature, F_R) \
\
do_class(java_nio_Buffer, "java/nio/Buffer") \
do_intrinsic(_checkIndex, java_nio_Buffer, checkIndex_name, int_int_signature, F_R) \
--- a/hotspot/src/share/vm/opto/classes.hpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/opto/classes.hpp Tue Mar 31 19:20:34 2009 -0700
@@ -218,6 +218,8 @@
macro(StoreP)
macro(StoreN)
macro(StrComp)
+macro(StrEquals)
+macro(StrIndexOf)
macro(SubD)
macro(SubF)
macro(SubI)
--- a/hotspot/src/share/vm/opto/gcm.cpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/opto/gcm.cpp Tue Mar 31 19:20:34 2009 -0700
@@ -438,6 +438,12 @@
#endif
assert(load_alias_idx || (load->is_Mach() && load->as_Mach()->ideal_Opcode() == Op_StrComp),
"String compare is only known 'load' that does not conflict with any stores");
+ assert(load_alias_idx || (load->is_Mach() && load->as_Mach()->ideal_Opcode() == Op_StrEquals),
+ "String equals is a 'load' that does not conflict with any stores");
+ assert(load_alias_idx || (load->is_Mach() && load->as_Mach()->ideal_Opcode() == Op_StrIndexOf),
+ "String indexOf is a 'load' that does not conflict with any stores");
+ assert(load_alias_idx || (load->is_Mach() && load->as_Mach()->ideal_Opcode() == Op_AryEq),
+ "Arrays equals is a 'load' that do not conflict with any stores");
if (!C->alias_type(load_alias_idx)->is_rewritable()) {
// It is impossible to spoil this load by putting stores before it,
--- a/hotspot/src/share/vm/opto/lcm.cpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/opto/lcm.cpp Tue Mar 31 19:20:34 2009 -0700
@@ -137,6 +137,8 @@
if( mach->in(2) != val ) continue;
break; // Found a memory op?
case Op_StrComp:
+ case Op_StrEquals:
+ case Op_StrIndexOf:
case Op_AryEq:
// Not a legit memory op for implicit null check regardless of
// embedded loads
--- a/hotspot/src/share/vm/opto/library_call.cpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/opto/library_call.cpp Tue Mar 31 19:20:34 2009 -0700
@@ -136,6 +136,7 @@
bool inline_string_compareTo();
bool inline_string_indexOf();
Node* string_indexOf(Node* string_object, ciTypeArray* target_array, jint offset, jint cache_i, jint md2_i);
+ bool inline_string_equals();
Node* pop_math_arg();
bool runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName);
bool inline_math_native(vmIntrinsics::ID id);
@@ -261,6 +262,7 @@
switch (id) {
case vmIntrinsics::_indexOf:
case vmIntrinsics::_compareTo:
+ case vmIntrinsics::_equals:
case vmIntrinsics::_equalsC:
break; // InlineNatives does not control String.compareTo
default:
@@ -275,6 +277,9 @@
case vmIntrinsics::_indexOf:
if (!SpecialStringIndexOf) return NULL;
break;
+ case vmIntrinsics::_equals:
+ if (!SpecialStringEquals) return NULL;
+ break;
case vmIntrinsics::_equalsC:
if (!SpecialArraysEquals) return NULL;
break;
@@ -442,6 +447,8 @@
return inline_string_compareTo();
case vmIntrinsics::_indexOf:
return inline_string_indexOf();
+ case vmIntrinsics::_equals:
+ return inline_string_equals();
case vmIntrinsics::_getObject:
return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, false);
@@ -793,6 +800,8 @@
//------------------------------inline_string_compareTo------------------------
bool LibraryCallKit::inline_string_compareTo() {
+ if (!Matcher::has_match_rule(Op_StrComp)) return false;
+
const int value_offset = java_lang_String::value_offset_in_bytes();
const int count_offset = java_lang_String::count_offset_in_bytes();
const int offset_offset = java_lang_String::offset_offset_in_bytes();
@@ -830,6 +839,82 @@
return true;
}
+//------------------------------inline_string_equals------------------------
+bool LibraryCallKit::inline_string_equals() {
+
+ if (!Matcher::has_match_rule(Op_StrEquals)) return false;
+
+ const int value_offset = java_lang_String::value_offset_in_bytes();
+ const int count_offset = java_lang_String::count_offset_in_bytes();
+ const int offset_offset = java_lang_String::offset_offset_in_bytes();
+
+ _sp += 2;
+ Node* argument = pop(); // pop non-receiver first: it was pushed second
+ Node* receiver = pop();
+
+ // Null check on self without removing any arguments. The argument
+ // null check technically happens in the wrong place, which can lead to
+ // invalid stack traces when string compare is inlined into a method
+ // which handles NullPointerExceptions.
+ _sp += 2;
+ receiver = do_null_check(receiver, T_OBJECT);
+ //should not do null check for argument for String.equals(), because spec
+ //allows to specify NULL as argument.
+ _sp -= 2;
+
+ if (stopped()) {
+ return true;
+ }
+
+ // get String klass for instanceOf
+ ciInstanceKlass* klass = env()->String_klass();
+
+ // two paths (plus control) merge
+ RegionNode* region = new (C, 3) RegionNode(3);
+ Node* phi = new (C, 3) PhiNode(region, TypeInt::BOOL);
+
+ Node* inst = gen_instanceof(argument, makecon(TypeKlassPtr::make(klass)));
+ Node* cmp = _gvn.transform(new (C, 3) CmpINode(inst, intcon(1)));
+ Node* bol = _gvn.transform(new (C, 2) BoolNode(cmp, BoolTest::eq));
+
+ IfNode* iff = create_and_map_if(control(), bol, PROB_MAX, COUNT_UNKNOWN);
+
+ Node* if_true = _gvn.transform(new (C, 1) IfTrueNode(iff));
+ set_control(if_true);
+
+ const TypeInstPtr* string_type =
+ TypeInstPtr::make(TypePtr::BotPTR, klass, false, NULL, 0);
+
+ // instanceOf == true
+ Node* equals =
+ _gvn.transform(new (C, 7) StrEqualsNode(
+ control(),
+ memory(TypeAryPtr::CHARS),
+ memory(string_type->add_offset(value_offset)),
+ memory(string_type->add_offset(count_offset)),
+ memory(string_type->add_offset(offset_offset)),
+ receiver,
+ argument));
+
+ phi->init_req(1, _gvn.transform(equals));
+ region->init_req(1, if_true);
+
+ //instanceOf == false, fallthrough
+ Node* if_false = _gvn.transform(new (C, 1) IfFalseNode(iff));
+ set_control(if_false);
+
+ phi->init_req(2, _gvn.transform(intcon(0)));
+ region->init_req(2, if_false);
+
+ // post merge
+ set_control(_gvn.transform(region));
+ record_for_igvn(region);
+
+ push(_gvn.transform(phi));
+
+ return true;
+}
+
//------------------------------inline_array_equals----------------------------
bool LibraryCallKit::inline_array_equals() {
@@ -994,80 +1079,115 @@
return result;
}
-
//------------------------------inline_string_indexOf------------------------
bool LibraryCallKit::inline_string_indexOf() {
- _sp += 2;
- Node *argument = pop(); // pop non-receiver first: it was pushed second
- Node *receiver = pop();
-
- // don't intrinsify if argument isn't a constant string.
- if (!argument->is_Con()) {
- return false;
- }
- const TypeOopPtr* str_type = _gvn.type(argument)->isa_oopptr();
- if (str_type == NULL) {
- return false;
- }
- ciInstanceKlass* klass = env()->String_klass();
- ciObject* str_const = str_type->const_oop();
- if (str_const == NULL || str_const->klass() != klass) {
- return false;
- }
- ciInstance* str = str_const->as_instance();
- assert(str != NULL, "must be instance");
-
const int value_offset = java_lang_String::value_offset_in_bytes();
const int count_offset = java_lang_String::count_offset_in_bytes();
const int offset_offset = java_lang_String::offset_offset_in_bytes();
- ciObject* v = str->field_value_by_offset(value_offset).as_object();
- int o = str->field_value_by_offset(offset_offset).as_int();
- int c = str->field_value_by_offset(count_offset).as_int();
- ciTypeArray* pat = v->as_type_array(); // pattern (argument) character array
-
- // constant strings have no offset and count == length which
- // simplifies the resulting code somewhat so lets optimize for that.
- if (o != 0 || c != pat->length()) {
- return false;
- }
-
- // Null check on self without removing any arguments. The argument
- // null check technically happens in the wrong place, which can lead to
- // invalid stack traces when string compare is inlined into a method
- // which handles NullPointerExceptions.
_sp += 2;
- receiver = do_null_check(receiver, T_OBJECT);
- // No null check on the argument is needed since it's a constant String oop.
- _sp -= 2;
- if (stopped()) {
- return true;
+ Node *argument = pop(); // pop non-receiver first: it was pushed second
+ Node *receiver = pop();
+
+ Node* result;
+ if (Matcher::has_match_rule(Op_StrIndexOf) &&
+ UseSSE42Intrinsics) {
+ // Generate SSE4.2 version of indexOf
+ // We currently only have match rules that use SSE4.2
+
+ // Null check on self without removing any arguments. The argument
+ // null check technically happens in the wrong place, which can lead to
+ // invalid stack traces when string compare is inlined into a method
+ // which handles NullPointerExceptions.
+ _sp += 2;
+ receiver = do_null_check(receiver, T_OBJECT);
+ argument = do_null_check(argument, T_OBJECT);
+ _sp -= 2;
+
+ if (stopped()) {
+ return true;
+ }
+
+ ciInstanceKlass* klass = env()->String_klass();
+ const TypeInstPtr* string_type =
+ TypeInstPtr::make(TypePtr::BotPTR, klass, false, NULL, 0);
+
+ result =
+ _gvn.transform(new (C, 7)
+ StrIndexOfNode(control(),
+ memory(TypeAryPtr::CHARS),
+ memory(string_type->add_offset(value_offset)),
+ memory(string_type->add_offset(count_offset)),
+ memory(string_type->add_offset(offset_offset)),
+ receiver,
+ argument));
+ } else { //Use LibraryCallKit::string_indexOf
+ // don't intrinsify is argument isn't a constant string.
+ if (!argument->is_Con()) {
+ return false;
+ }
+ const TypeOopPtr* str_type = _gvn.type(argument)->isa_oopptr();
+ if (str_type == NULL) {
+ return false;
+ }
+ ciInstanceKlass* klass = env()->String_klass();
+ ciObject* str_const = str_type->const_oop();
+ if (str_const == NULL || str_const->klass() != klass) {
+ return false;
+ }
+ ciInstance* str = str_const->as_instance();
+ assert(str != NULL, "must be instance");
+
+ ciObject* v = str->field_value_by_offset(value_offset).as_object();
+ int o = str->field_value_by_offset(offset_offset).as_int();
+ int c = str->field_value_by_offset(count_offset).as_int();
+ ciTypeArray* pat = v->as_type_array(); // pattern (argument) character array
+
+ // constant strings have no offset and count == length which
+ // simplifies the resulting code somewhat so lets optimize for that.
+ if (o != 0 || c != pat->length()) {
+ return false;
+ }
+
+ // Null check on self without removing any arguments. The argument
+ // null check technically happens in the wrong place, which can lead to
+ // invalid stack traces when string compare is inlined into a method
+ // which handles NullPointerExceptions.
+ _sp += 2;
+ receiver = do_null_check(receiver, T_OBJECT);
+ // No null check on the argument is needed since it's a constant String oop.
+ _sp -= 2;
+ if (stopped()) {
+ return true;
+ }
+
+ // The null string as a pattern always returns 0 (match at beginning of string)
+ if (c == 0) {
+ push(intcon(0));
+ return true;
+ }
+
+ // Generate default indexOf
+ jchar lastChar = pat->char_at(o + (c - 1));
+ int cache = 0;
+ int i;
+ for (i = 0; i < c - 1; i++) {
+ assert(i < pat->length(), "out of range");
+ cache |= (1 << (pat->char_at(o + i) & (sizeof(cache) * BitsPerByte - 1)));
+ }
+
+ int md2 = c;
+ for (i = 0; i < c - 1; i++) {
+ assert(i < pat->length(), "out of range");
+ if (pat->char_at(o + i) == lastChar) {
+ md2 = (c - 1) - i;
+ }
+ }
+
+ result = string_indexOf(receiver, pat, o, cache, md2);
}
- // The null string as a pattern always returns 0 (match at beginning of string)
- if (c == 0) {
- push(intcon(0));
- return true;
- }
-
- jchar lastChar = pat->char_at(o + (c - 1));
- int cache = 0;
- int i;
- for (i = 0; i < c - 1; i++) {
- assert(i < pat->length(), "out of range");
- cache |= (1 << (pat->char_at(o + i) & (sizeof(cache) * BitsPerByte - 1)));
- }
-
- int md2 = c;
- for (i = 0; i < c - 1; i++) {
- assert(i < pat->length(), "out of range");
- if (pat->char_at(o + i) == lastChar) {
- md2 = (c - 1) - i;
- }
- }
-
- Node* result = string_indexOf(receiver, pat, o, cache, md2);
push(result);
return true;
}
--- a/hotspot/src/share/vm/opto/loopnode.cpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/opto/loopnode.cpp Tue Mar 31 19:20:34 2009 -0700
@@ -2668,6 +2668,8 @@
case Op_LoadD_unaligned:
case Op_LoadL_unaligned:
case Op_StrComp: // Does a bunch of load-like effects
+ case Op_StrEquals:
+ case Op_StrIndexOf:
case Op_AryEq:
pinned = false;
}
--- a/hotspot/src/share/vm/opto/matcher.cpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/opto/matcher.cpp Tue Mar 31 19:20:34 2009 -0700
@@ -746,6 +746,8 @@
if (nidx == Compile::AliasIdxBot && midx == Compile::AliasIdxTop) {
switch (n->Opcode()) {
case Op_StrComp:
+ case Op_StrEquals:
+ case Op_StrIndexOf:
case Op_AryEq:
case Op_MemBarVolatile:
case Op_MemBarCPUOrder: // %%% these ideals should have narrower adr_type?
@@ -1788,6 +1790,8 @@
mstack.push(n->in(0), Pre_Visit); // Visit Control input
continue; // while (mstack.is_nonempty())
case Op_StrComp:
+ case Op_StrEquals:
+ case Op_StrIndexOf:
case Op_AryEq:
set_shared(n); // Force result into register (it will be anyways)
break;
--- a/hotspot/src/share/vm/opto/memnode.cpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/opto/memnode.cpp Tue Mar 31 19:20:34 2009 -0700
@@ -2481,6 +2481,31 @@
return remove_dead_region(phase, can_reshape) ? this : NULL;
}
+// Do we match on this edge? No memory edges
+uint StrEqualsNode::match_edge(uint idx) const {
+ return idx == 5 || idx == 6;
+}
+
+//------------------------------Ideal------------------------------------------
+// Return a node which is more "ideal" than the current node. Strip out
+// control copies
+Node *StrEqualsNode::Ideal(PhaseGVN *phase, bool can_reshape){
+ return remove_dead_region(phase, can_reshape) ? this : NULL;
+}
+
+//=============================================================================
+// Do we match on this edge? No memory edges
+uint StrIndexOfNode::match_edge(uint idx) const {
+ return idx == 5 || idx == 6;
+}
+
+//------------------------------Ideal------------------------------------------
+// Return a node which is more "ideal" than the current node. Strip out
+// control copies
+Node *StrIndexOfNode::Ideal(PhaseGVN *phase, bool can_reshape){
+ return remove_dead_region(phase, can_reshape) ? this : NULL;
+}
+
//------------------------------Ideal------------------------------------------
// Return a node which is more "ideal" than the current node. Strip out
// control copies
@@ -2488,7 +2513,6 @@
return remove_dead_region(phase, can_reshape) ? this : NULL;
}
-
//=============================================================================
MemBarNode::MemBarNode(Compile* C, int alias_idx, Node* precedent)
: MultiNode(TypeFunc::Parms + (precedent == NULL? 0: 1)),
--- a/hotspot/src/share/vm/opto/memnode.hpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/opto/memnode.hpp Tue Mar 31 19:20:34 2009 -0700
@@ -765,6 +765,54 @@
virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
};
+//------------------------------StrEquals-------------------------------------
+class StrEqualsNode: public Node {
+public:
+ StrEqualsNode(Node *control,
+ Node* char_array_mem,
+ Node* value_mem,
+ Node* count_mem,
+ Node* offset_mem,
+ Node* s1, Node* s2): Node(control,
+ char_array_mem,
+ value_mem,
+ count_mem,
+ offset_mem,
+ s1, s2) {};
+ virtual int Opcode() const;
+ virtual bool depends_only_on_test() const { return false; }
+ virtual const Type* bottom_type() const { return TypeInt::BOOL; }
+ // a StrEqualsNode (conservatively) aliases with everything:
+ virtual const TypePtr* adr_type() const { return TypePtr::BOTTOM; }
+ virtual uint match_edge(uint idx) const;
+ virtual uint ideal_reg() const { return Op_RegI; }
+ virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
+};
+
+//------------------------------StrIndexOf-------------------------------------
+class StrIndexOfNode: public Node {
+public:
+ StrIndexOfNode(Node *control,
+ Node* char_array_mem,
+ Node* value_mem,
+ Node* count_mem,
+ Node* offset_mem,
+ Node* s1, Node* s2): Node(control,
+ char_array_mem,
+ value_mem,
+ count_mem,
+ offset_mem,
+ s1, s2) {};
+ virtual int Opcode() const;
+ virtual bool depends_only_on_test() const { return false; }
+ virtual const Type* bottom_type() const { return TypeInt::INT; }
+ // a StrIndexOfNode (conservatively) aliases with everything:
+ virtual const TypePtr* adr_type() const { return TypePtr::BOTTOM; }
+ virtual uint match_edge(uint idx) const;
+ virtual uint ideal_reg() const { return Op_RegI; }
+ virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
+};
+
//------------------------------AryEq---------------------------------------
class AryEqNode: public Node {
public:
--- a/hotspot/src/share/vm/runtime/arguments.cpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/runtime/arguments.cpp Tue Mar 31 19:20:34 2009 -0700
@@ -1366,9 +1366,6 @@
if (AggressiveOpts && FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
}
- if (AggressiveOpts && FLAG_IS_DEFAULT(SpecialArraysEquals)) {
- FLAG_SET_DEFAULT(SpecialArraysEquals, true);
- }
if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
}
--- a/hotspot/src/share/vm/runtime/globals.hpp Tue Mar 31 15:09:45 2009 -0700
+++ b/hotspot/src/share/vm/runtime/globals.hpp Tue Mar 31 19:20:34 2009 -0700
@@ -491,9 +491,15 @@
develop(bool, SpecialStringIndexOf, true, \
"special version of string indexOf") \
\
- product(bool, SpecialArraysEquals, false, \
+ develop(bool, SpecialStringEquals, true, \
+ "special version of string equals") \
+ \
+ develop(bool, SpecialArraysEquals, true, \
"special version of Arrays.equals(char[],char[])") \
\
+ product(bool, UseSSE42Intrinsics, false, \
+ "SSE4.2 versions of intrinsics") \
+ \
develop(bool, TraceCallFixup, false, \
"traces all call fixups") \
\