--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/x86/vm/jniFastGetField_x86_64.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,224 @@
+/*
+ * Copyright 2004-2006 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+# include "incls/_precompiled.incl"
+# include "incls/_jniFastGetField_x86_64.cpp.incl"
+
+#define __ masm->
+
+#define BUFFER_SIZE 30*wordSize
+
+// Instead of issuing lfence for LoadLoad barrier, we create data dependency
+// between loads, which is more efficient than lfence.
+
+// Common register usage:
+// rax/xmm0: result
+// c_rarg0: jni env
+// c_rarg1: obj
+// c_rarg2: jfield id
+
+static const Register robj = r9;
+static const Register rcounter = r10;
+static const Register roffset = r11;
+static const Register rcounter_addr = r11;
+
+// Warning: do not use rip relative addressing after the first counter load
+// since that may scratch r10!
+
+address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) {
+ const char *name;
+ switch (type) {
+ case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break;
+ case T_BYTE: name = "jni_fast_GetByteField"; break;
+ case T_CHAR: name = "jni_fast_GetCharField"; break;
+ case T_SHORT: name = "jni_fast_GetShortField"; break;
+ case T_INT: name = "jni_fast_GetIntField"; break;
+ case T_LONG: name = "jni_fast_GetLongField"; break;
+ default: ShouldNotReachHere();
+ }
+ ResourceMark rm;
+ BufferBlob* b = BufferBlob::create(name, BUFFER_SIZE);
+ address fast_entry = b->instructions_begin();
+ CodeBuffer cbuf(fast_entry, b->instructions_size());
+ MacroAssembler* masm = new MacroAssembler(&cbuf);
+
+ Label slow;
+
+ ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
+ __ mov32 (rcounter, counter);
+ __ movq (robj, c_rarg1);
+ __ testb (rcounter, 1);
+ __ jcc (Assembler::notZero, slow);
+ if (os::is_MP()) {
+ __ xorq (robj, rcounter);
+ __ xorq (robj, rcounter); // obj, since
+ // robj ^ rcounter ^ rcounter == robj
+ // robj is data dependent on rcounter.
+ }
+ __ movq (robj, Address(robj, 0)); // *obj
+ __ movq (roffset, c_rarg2);
+ __ shrq (roffset, 2); // offset
+
+ assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
+ speculative_load_pclist[count] = __ pc();
+ switch (type) {
+ case T_BOOLEAN: __ movzbl (rax, Address(robj, roffset, Address::times_1)); break;
+ case T_BYTE: __ movsbl (rax, Address(robj, roffset, Address::times_1)); break;
+ case T_CHAR: __ movzwl (rax, Address(robj, roffset, Address::times_1)); break;
+ case T_SHORT: __ movswl (rax, Address(robj, roffset, Address::times_1)); break;
+ case T_INT: __ movl (rax, Address(robj, roffset, Address::times_1)); break;
+ case T_LONG: __ movq (rax, Address(robj, roffset, Address::times_1)); break;
+ default: ShouldNotReachHere();
+ }
+
+ if (os::is_MP()) {
+ __ lea(rcounter_addr, counter);
+ // ca is data dependent on rax.
+ __ xorq (rcounter_addr, rax);
+ __ xorq (rcounter_addr, rax);
+ __ cmpl (rcounter, Address(rcounter_addr, 0));
+ } else {
+ __ cmp32 (rcounter, counter);
+ }
+ __ jcc (Assembler::notEqual, slow);
+
+ __ ret (0);
+
+ slowcase_entry_pclist[count++] = __ pc();
+ __ bind (slow);
+ address slow_case_addr;
+ switch (type) {
+ case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break;
+ case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break;
+ case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break;
+ case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break;
+ case T_INT: slow_case_addr = jni_GetIntField_addr(); break;
+ case T_LONG: slow_case_addr = jni_GetLongField_addr();
+ }
+ // tail call
+ __ jump (ExternalAddress(slow_case_addr));
+
+ __ flush ();
+
+ return fast_entry;
+}
+
+address JNI_FastGetField::generate_fast_get_boolean_field() {
+ return generate_fast_get_int_field0(T_BOOLEAN);
+}
+
+address JNI_FastGetField::generate_fast_get_byte_field() {
+ return generate_fast_get_int_field0(T_BYTE);
+}
+
+address JNI_FastGetField::generate_fast_get_char_field() {
+ return generate_fast_get_int_field0(T_CHAR);
+}
+
+address JNI_FastGetField::generate_fast_get_short_field() {
+ return generate_fast_get_int_field0(T_SHORT);
+}
+
+address JNI_FastGetField::generate_fast_get_int_field() {
+ return generate_fast_get_int_field0(T_INT);
+}
+
+address JNI_FastGetField::generate_fast_get_long_field() {
+ return generate_fast_get_int_field0(T_LONG);
+}
+
+address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) {
+ const char *name;
+ switch (type) {
+ case T_FLOAT: name = "jni_fast_GetFloatField"; break;
+ case T_DOUBLE: name = "jni_fast_GetDoubleField"; break;
+ default: ShouldNotReachHere();
+ }
+ ResourceMark rm;
+ BufferBlob* b = BufferBlob::create(name, BUFFER_SIZE);
+ address fast_entry = b->instructions_begin();
+ CodeBuffer cbuf(fast_entry, b->instructions_size());
+ MacroAssembler* masm = new MacroAssembler(&cbuf);
+
+ Label slow;
+
+ ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr());
+ __ mov32 (rcounter, counter);
+ __ movq (robj, c_rarg1);
+ __ testb (rcounter, 1);
+ __ jcc (Assembler::notZero, slow);
+ if (os::is_MP()) {
+ __ xorq (robj, rcounter);
+ __ xorq (robj, rcounter); // obj, since
+ // robj ^ rcounter ^ rcounter == robj
+ // robj is data dependent on rcounter.
+ }
+ __ movq (robj, Address(robj, 0)); // *obj
+ __ movq (roffset, c_rarg2);
+ __ shrq (roffset, 2); // offset
+
+ assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");
+ speculative_load_pclist[count] = __ pc();
+ switch (type) {
+ case T_FLOAT: __ movflt (xmm0, Address(robj, roffset, Address::times_1)); break;
+ case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break;
+ default: ShouldNotReachHere();
+ }
+
+ if (os::is_MP()) {
+ __ lea(rcounter_addr, counter);
+ __ movdq (rax, xmm0);
+ // counter address is data dependent on xmm0.
+ __ xorq (rcounter_addr, rax);
+ __ xorq (rcounter_addr, rax);
+ __ cmpl (rcounter, Address(rcounter_addr, 0));
+ } else {
+ __ cmp32 (rcounter, counter);
+ }
+ __ jcc (Assembler::notEqual, slow);
+
+ __ ret (0);
+
+ slowcase_entry_pclist[count++] = __ pc();
+ __ bind (slow);
+ address slow_case_addr;
+ switch (type) {
+ case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break;
+ case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr();
+ }
+ // tail call
+ __ jump (ExternalAddress(slow_case_addr));
+
+ __ flush ();
+
+ return fast_entry;
+}
+
+address JNI_FastGetField::generate_fast_get_float_field() {
+ return generate_fast_get_float_field0(T_FLOAT);
+}
+
+address JNI_FastGetField::generate_fast_get_double_field() {
+ return generate_fast_get_float_field0(T_DOUBLE);
+}