Mercurial > hg > graal-jvmci-8
diff src/share/vm/asm/register.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/asm/register.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,211 @@ +/* + * Copyright 2000-2002 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. + * + */ + +// Use AbstractRegister as shortcut +class AbstractRegisterImpl; +typedef AbstractRegisterImpl* AbstractRegister; + + +// The super class for platform specific registers. Instead of using value objects, +// registers are implemented as pointers. Subclassing is used so all registers can +// use the debugging suport below. No virtual functions are used for efficiency. +// They are canonicalized; i.e., registers are equal if their pointers are equal, +// and vice versa. A concrete implementation may just map the register onto 'this'. + +class AbstractRegisterImpl { + protected: + int value() const { return (int)(intx)this; } +}; + + +// +// Macros for use in defining Register instances. We'd like to be +// able to simply define const instances of the RegisterImpl* for each +// of the registers needed on a system in a header file. However many +// compilers don't handle this very well and end up producing a +// private definition in every file which includes the header file. +// Along with the static constructors necessary for initialization it +// can consume a significant amount of space in the result library. +// +// The following macros allow us to declare the instance in a .hpp and +// produce an enumeration value which has the same number. Then in a +// .cpp the the register instance can be defined using the enumeration +// value. This avoids the use of static constructors and multiple +// definitions per .cpp. In addition #defines for the register can be +// produced so that the constant registers can be inlined. These +// macros should not be used inside other macros, because you may get +// multiple evaluations of the macros which can give bad results. +// +// Here are some example uses and expansions. Note that the macro +// invocation is terminated with a ;. +// +// CONSTANT_REGISTER_DECLARATION(Register, G0, 0); +// +// extern const Register G0 ; +// enum { G0_RegisterEnumValue = 0 } ; +// +// REGISTER_DECLARATION(Register, Gmethod, G5); +// +// extern const Register Gmethod ; +// enum { Gmethod_RegisterEnumValue = G5_RegisterEnumValue } ; +// +// REGISTER_DEFINITION(Register, G0); +// +// const Register G0 = ( ( Register ) G0_RegisterEnumValue ) ; +// + +#define AS_REGISTER(type,name) ((type)name##_##type##EnumValue) + +#define CONSTANT_REGISTER_DECLARATION(type, name, value) \ +extern const type name; \ +enum { name##_##type##EnumValue = (value) } + +#define REGISTER_DECLARATION(type, name, value) \ +extern const type name; \ +enum { name##_##type##EnumValue = value##_##type##EnumValue } + +#define REGISTER_DEFINITION(type, name) \ +const type name = ((type)name##_##type##EnumValue) + + + +// Debugging support + +inline void assert_different_registers( + AbstractRegister a, + AbstractRegister b +) { + assert( + a != b, + "registers must be different" + ); +} + + +inline void assert_different_registers( + AbstractRegister a, + AbstractRegister b, + AbstractRegister c +) { + assert( + a != b && a != c + && b != c, + "registers must be different" + ); +} + + +inline void assert_different_registers( + AbstractRegister a, + AbstractRegister b, + AbstractRegister c, + AbstractRegister d +) { + assert( + a != b && a != c && a != d + && b != c && b != d + && c != d, + "registers must be different" + ); +} + + +inline void assert_different_registers( + AbstractRegister a, + AbstractRegister b, + AbstractRegister c, + AbstractRegister d, + AbstractRegister e +) { + assert( + a != b && a != c && a != d && a != e + && b != c && b != d && b != e + && c != d && c != e + && d != e, + "registers must be different" + ); +} + + +inline void assert_different_registers( + AbstractRegister a, + AbstractRegister b, + AbstractRegister c, + AbstractRegister d, + AbstractRegister e, + AbstractRegister f +) { + assert( + a != b && a != c && a != d && a != e && a != f + && b != c && b != d && b != e && b != f + && c != d && c != e && c != f + && d != e && d != f + && e != f, + "registers must be different" + ); +} + + +inline void assert_different_registers( + AbstractRegister a, + AbstractRegister b, + AbstractRegister c, + AbstractRegister d, + AbstractRegister e, + AbstractRegister f, + AbstractRegister g +) { + assert( + a != b && a != c && a != d && a != e && a != f && a != g + && b != c && b != d && b != e && b != f && b != g + && c != d && c != e && c != f && c != g + && d != e && d != f && d != g + && e != f && e != g + && f != g, + "registers must be different" + ); +} + + +inline void assert_different_registers( + AbstractRegister a, + AbstractRegister b, + AbstractRegister c, + AbstractRegister d, + AbstractRegister e, + AbstractRegister f, + AbstractRegister g, + AbstractRegister h +) { + assert( + a != b && a != c && a != d && a != e && a != f && a != g && a != h + && b != c && b != d && b != e && b != f && b != g && b != h + && c != d && c != e && c != f && c != g && c != h + && d != e && d != f && d != g && d != h + && e != f && e != g && e != h + && f != g && f != h + && g != h, + "registers must be different" + ); +}