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comparison src/cpu/x86/vm/interp_masm_x86.cpp @ 23614:32b682649973 jdk8u75-b04

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8132051: Better byte behavior Reviewed-by: coleenp, roland
author kevinw
date Fri, 15 Jan 2016 22:33:15 +0000
parents ce9fd31ffd14
children b5f3a471e646
comparison
equal deleted inserted replaced
23613:b374548dcb48 23614:32b682649973
1 /* 1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
24 24
25 #include "precompiled.hpp" 25 #include "precompiled.hpp"
26 #include "interp_masm_x86.hpp" 26 #include "interp_masm_x86.hpp"
27 #include "interpreter/interpreter.hpp" 27 #include "interpreter/interpreter.hpp"
28 #include "oops/methodData.hpp" 28 #include "oops/methodData.hpp"
29
30
31 // 8u does not have InterpreterMacroAssembler::load_earlyret_value here
32
33 void InterpreterMacroAssembler::narrow(Register result) {
34
35 // Get method->_constMethod->_result_type
36 movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
37 movptr(rcx, Address(rcx, Method::const_offset()));
38 load_unsigned_byte(rcx, Address(rcx, ConstMethod::result_type_offset()));
39
40 Label done, notBool, notByte, notChar;
41
42 // common case first
43 cmpl(rcx, T_INT);
44 jcc(Assembler::equal, done);
45
46 // mask integer result to narrower return type.
47 cmpl(rcx, T_BOOLEAN);
48 jcc(Assembler::notEqual, notBool);
49 andl(result, 0x1);
50 jmp(done);
51
52 bind(notBool);
53 cmpl(rcx, T_BYTE);
54 jcc(Assembler::notEqual, notByte);
55 LP64_ONLY(movsbl(result, result);)
56 NOT_LP64(shll(result, 24);) // truncate upper 24 bits
57 NOT_LP64(sarl(result, 24);) // and sign-extend byte
58 jmp(done);
59
60 bind(notByte);
61 cmpl(rcx, T_CHAR);
62 jcc(Assembler::notEqual, notChar);
63 LP64_ONLY(movzwl(result, result);)
64 NOT_LP64(andl(result, 0xFFFF);) // truncate upper 16 bits
65 jmp(done);
66
67 bind(notChar);
68 // cmpl(rcx, T_SHORT); // all that's left
69 // jcc(Assembler::notEqual, done);
70 LP64_ONLY(movswl(result, result);)
71 NOT_LP64(shll(result, 16);) // truncate upper 16 bits
72 NOT_LP64(sarl(result, 16);) // and sign-extend short
73
74 // Nothing to do for T_INT
75 bind(done);
76 }
29 77
30 #ifndef CC_INTERP 78 #ifndef CC_INTERP
31 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) { 79 void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
32 Label update, next, none; 80 Label update, next, none;
33 81