Mercurial > hg > graal-jvmci-8
diff src/cpu/x86/vm/jniFastGetField_x86_64.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | dc7f315e41f7 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/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); +}