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src/cpu/x86/vm/assembler_x86_64.inline.hpp@885ed790ecf0 (annotated)

src/cpu/x86/vm/assembler_x86_64.inline.hpp

Wed, 21 May 2008 10:45:07 -0700

author

kvn

date

Wed, 21 May 2008 10:45:07 -0700

changeset 598

885ed790ecf0

parent 435

a61af66fc99e

permissions

-rw-r--r--

6695810: null oop passed to encode_heap_oop_not_null
Summary: fix several problems in C2 related to Escape Analysis and Compressed Oops.
Reviewed-by: never, jrose

duke@435	1	/*
duke@435	2	* Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	inline void Assembler::emit_long64(jlong x) {
duke@435	26	*(jlong*) _code_pos = x;
duke@435	27	_code_pos += sizeof(jlong);
duke@435	28	code_section()->set_end(_code_pos);
duke@435	29	}
duke@435	30
duke@435	31	inline void MacroAssembler::pd_patch_instruction(address branch, address target) {
duke@435	32	unsigned char op = branch[0];
duke@435	33	assert(op == 0xE8 /* call */ ||
duke@435	34	op == 0xE9 /* jmp */ ||
duke@435	35	op == 0xEB /* short jmp */ ||
duke@435	36	(op & 0xF0) == 0x70 /* short jcc */ ||
duke@435	37	op == 0x0F && (branch[1] & 0xF0) == 0x80 /* jcc */,
duke@435	38	"Invalid opcode at patch point");
duke@435	39
duke@435	40	if (op == 0xEB || (op & 0xF0) == 0x70) {
duke@435	41	// short offset operators (jmp and jcc)
duke@435	42	char* disp = (char*) &branch[1];
duke@435	43	int imm8 = target - (address) &disp[1];
duke@435	44	guarantee(this->is8bit(imm8), "Short forward jump exceeds 8-bit offset");
duke@435	45	*disp = imm8;
duke@435	46	} else {
duke@435	47	int* disp = (int*) &branch[(op == 0x0F)? 2: 1];
duke@435	48	int imm32 = target - (address) &disp[1];
duke@435	49	*disp = imm32;
duke@435	50	}
duke@435	51	}
duke@435	52
duke@435	53	#ifndef PRODUCT
duke@435	54	inline void MacroAssembler::pd_print_patched_instruction(address branch) {
duke@435	55	const char* s;
duke@435	56	unsigned char op = branch[0];
duke@435	57	if (op == 0xE8) {
duke@435	58	s = "call";
duke@435	59	} else if (op == 0xE9 || op == 0xEB) {
duke@435	60	s = "jmp";
duke@435	61	} else if ((op & 0xF0) == 0x70) {
duke@435	62	s = "jcc";
duke@435	63	} else if (op == 0x0F) {
duke@435	64	s = "jcc";
duke@435	65	} else {
duke@435	66	s = "????";
duke@435	67	}
duke@435	68	tty->print("%s (unresolved)", s);
duke@435	69	}
duke@435	70	#endif // ndef PRODUCT
duke@435	71
duke@435	72	inline void MacroAssembler::movptr(Address dst, intptr_t src) {
duke@435	73	#ifdef _LP64
duke@435	74	Assembler::mov64(dst, src);
duke@435	75	#else
duke@435	76	Assembler::movl(dst, src);
duke@435	77	#endif // _LP64
duke@435	78	}
duke@435	79
duke@435	80	inline void MacroAssembler::movptr(Register dst, intptr_t src) {
duke@435	81	#ifdef _LP64
duke@435	82	Assembler::mov64(dst, src);
duke@435	83	#else
duke@435	84	Assembler::movl(dst, src);
duke@435	85	#endif // _LP64
duke@435	86	}