jdk8-mips64-public/hotspot: src/cpu/x86/vm/bytes

6761600: Use sse 4.2 in intrinsics
Summary: Use SSE 4.2 in intrinsics for String.{compareTo/equals/indexOf} and Arrays.equals.
Reviewed-by: kvn, never, jrose

     1 /*

     2  * Copyright 1997-2001 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     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

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 class Bytes: AllStatic {

    26  private:

    27 #ifndef AMD64

    28   // Helper function for swap_u8

    29   static inline u8   swap_u8_base(u4 x, u4 y);        // compiler-dependent implementation

    30 #endif // AMD64

    32  public:

    33   // Returns true if the byte ordering used by Java is different from the native byte ordering

    34   // of the underlying machine. For example, this is true for Intel x86, but false for Solaris

    35   // on Sparc.

    36   static inline bool is_Java_byte_ordering_different(){ return true; }

    39   // Efficient reading and writing of unaligned unsigned data in platform-specific byte ordering

    40   // (no special code is needed since x86 CPUs can access unaligned data)

    41   static inline u2   get_native_u2(address p)         { return *(u2*)p; }

    42   static inline u4   get_native_u4(address p)         { return *(u4*)p; }

    43   static inline u8   get_native_u8(address p)         { return *(u8*)p; }

    45   static inline void put_native_u2(address p, u2 x)   { *(u2*)p = x; }

    46   static inline void put_native_u4(address p, u4 x)   { *(u4*)p = x; }

    47   static inline void put_native_u8(address p, u8 x)   { *(u8*)p = x; }

    50   // Efficient reading and writing of unaligned unsigned data in Java

    51   // byte ordering (i.e. big-endian ordering). Byte-order reversal is

    52   // needed since x86 CPUs use little-endian format.

    53   static inline u2   get_Java_u2(address p)           { return swap_u2(get_native_u2(p)); }

    54   static inline u4   get_Java_u4(address p)           { return swap_u4(get_native_u4(p)); }

    55   static inline u8   get_Java_u8(address p)           { return swap_u8(get_native_u8(p)); }

    57   static inline void put_Java_u2(address p, u2 x)     { put_native_u2(p, swap_u2(x)); }

    58   static inline void put_Java_u4(address p, u4 x)     { put_native_u4(p, swap_u4(x)); }

    59   static inline void put_Java_u8(address p, u8 x)     { put_native_u8(p, swap_u8(x)); }

    62   // Efficient swapping of byte ordering

    63   static inline u2   swap_u2(u2 x);                   // compiler-dependent implementation

    64   static inline u4   swap_u4(u4 x);                   // compiler-dependent implementation

    65   static inline u8   swap_u8(u8 x);

    66 };

    69 // The following header contains the implementations of swap_u2, swap_u4, and swap_u8[_base]

    70 #include "incls/_bytes_pd.inline.hpp.incl"

src/cpu/x86/vm/bytes_x86.hpp@fbde8ec322d0

src/cpu/x86/vm/bytes_x86.hpp

Mercurial > jdk8-mips64-public > hotspot / file revision

src/cpu/x86/vm/bytes_x86.hpp@fbde8ec322d0

src/cpu/x86/vm/bytes_x86.hpp