Mercurial > hg > truffle
view src/cpu/sparc/vm/jniTypes_sparc.hpp @ 453:c96030fff130
6684579: SoftReference processing can be made more efficient
Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa
author | ysr |
---|---|
date | Thu, 20 Nov 2008 16:56:09 -0800 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 1998-2002 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. * */ // This file holds platform-dependent routines used to write primitive jni // types to the array of arguments passed into JavaCalls::call class JNITypes : AllStatic { // These functions write a java primitive type (in native format) // to a java stack slot array to be passed as an argument to JavaCalls:calls. // I.e., they are functionally 'push' operations if they have a 'pos' // formal parameter. Note that jlong's and jdouble's are written // _in reverse_ of the order in which they appear in the interpreter // stack. This is because call stubs (see stubGenerator_sparc.cpp) // reverse the argument list constructed by JavaCallArguments (see // javaCalls.hpp). private: // Helper routines. static inline void put_int2 (jint *from, jint *to) { to[0] = from[0]; to[1] = from[1]; } static inline void put_int2 (jint *from, jint *to, int& pos) { put_int2 (from, (jint *)((intptr_t *)to + pos)); pos += 2; } static inline void put_int2r(jint *from, jint *to) { to[0] = from[1]; to[1] = from[0]; } static inline void put_int2r(jint *from, jint *to, int& pos) { put_int2r(from, (jint *)((intptr_t *)to + pos)); pos += 2; } public: // Ints are stored in native format in one JavaCallArgument slot at *to. static inline void put_int(jint from, intptr_t *to) { *(jint *)(to + 0 ) = from; } static inline void put_int(jint from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = from; } static inline void put_int(jint *from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = *from; } #ifdef _LP64 // Longs are stored in native format in one JavaCallArgument slot at *(to+1). static inline void put_long(jlong from, intptr_t *to) { *(jlong *)(to + 1 + 0) = from; } static inline void put_long(jlong from, intptr_t *to, int& pos) { *(jlong *)(to + 1 + pos) = from; pos += 2; } static inline void put_long(jlong *from, intptr_t *to, int& pos) { *(jlong *)(to + 1 + pos) = *from; pos += 2; } #else // Longs are stored in reversed native word format in two JavaCallArgument slots at *to. // The high half is in *(to+1) and the low half in *to. static inline void put_long(jlong from, intptr_t *to) { put_int2r((jint *)&from, (jint *)to); } static inline void put_long(jlong from, intptr_t *to, int& pos) { put_int2r((jint *)&from, (jint *)to, pos); } static inline void put_long(jlong *from, intptr_t *to, int& pos) { put_int2r((jint *) from, (jint *)to, pos); } #endif // Oops are stored in native format in one JavaCallArgument slot at *to. static inline void put_obj(oop from, intptr_t *to) { *(oop *)(to + 0 ) = from; } static inline void put_obj(oop from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = from; } static inline void put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; } // Floats are stored in native format in one JavaCallArgument slot at *to. static inline void put_float(jfloat from, intptr_t *to) { *(jfloat *)(to + 0 ) = from; } static inline void put_float(jfloat from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = from; } static inline void put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; } #ifdef _LP64 // Doubles are stored in native word format in one JavaCallArgument slot at *(to+1). static inline void put_double(jdouble from, intptr_t *to) { *(jdouble *)(to + 1 + 0) = from; } static inline void put_double(jdouble from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) = from; pos += 2; } static inline void put_double(jdouble *from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) = *from; pos += 2; } #else // Doubles are stored in reversed native word format in two JavaCallArgument slots at *to. static inline void put_double(jdouble from, intptr_t *to) { put_int2r((jint *)&from, (jint *)to); } static inline void put_double(jdouble from, intptr_t *to, int& pos) { put_int2r((jint *)&from, (jint *)to, pos); } static inline void put_double(jdouble *from, intptr_t *to, int& pos) { put_int2r((jint *) from, (jint *)to, pos); } #endif // The get_xxx routines, on the other hand, actually _do_ fetch // java primitive types from the interpreter stack. static inline jint get_int(intptr_t *from) { return *(jint *)from; } #ifdef _LP64 static inline jlong get_long(intptr_t *from) { return *(jlong *)from; } #else static inline jlong get_long(intptr_t *from) { return ((jlong)(*( signed int *)((jint *)from )) << 32) | ((jlong)(*(unsigned int *)((jint *)from + 1)) << 0); } #endif static inline oop get_obj(intptr_t *from) { return *(oop *)from; } static inline jfloat get_float(intptr_t *from) { return *(jfloat *)from; } #ifdef _LP64 static inline jdouble get_double(intptr_t *from) { return *(jdouble *)from; } #else static inline jdouble get_double(intptr_t *from) { jlong jl = ((jlong)(*( signed int *)((jint *)from )) << 32) | ((jlong)(*(unsigned int *)((jint *)from + 1)) << 0); return *(jdouble *)&jl; } #endif };