2 This file is a part of libcds - Concurrent Data Structures library
4 (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2016
6 Source code repo: http://github.com/khizmax/libcds/
7 Download: http://sourceforge.net/projects/libcds/files/
9 Redistribution and use in source and binary forms, with or without
10 modification, are permitted provided that the following conditions are met:
12 * Redistributions of source code must retain the above copyright notice, this
13 list of conditions and the following disclaimer.
15 * Redistributions in binary form must reproduce the above copyright notice,
16 this list of conditions and the following disclaimer in the documentation
17 and/or other materials provided with the distribution.
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
23 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
26 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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28 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef CDSLIB_COMPILER_GCC_IA64_BITOP_H
32 #define CDSLIB_COMPILER_GCC_IA64_BITOP_H
36 namespace bitop { namespace platform { namespace gcc { namespace ia64 {
38 // MSB - return index (1..32) of most significant bit in x. If x == 0 return 0
39 # define cds_bitop_msb32_DEFINED
40 static inline int msb32( uint32_t nArg )
52 asm __volatile__( "popcnt %0=%1\n\t" : "=r" (nRes) : "r" (x));
56 // It is not compiled on HP-UX. Why?..
57 #if CDS_OS_TYPE != CDS_OS_HPUX
58 // MSB - return index (0..31) of most significant bit in nArg.
60 # define cds_bitop_msb32nz_DEFINED
61 static inline int msb32nz( uint32_t nArg )
66 asm __volatile__("getf.exp %0=%1\n\t" : "=r"(nExp) : "f"(d));
67 return (int) (nExp - 0xffff);
70 // MSB - return index (0..63) of most significant bit in nArg.
72 # define cds_bitop_msb64nz_DEFINED
73 static inline int msb64nz( uint64_t nArg )
78 asm __volatile__("getf.exp %0=%1\n\t" : "=r" (nExp) : "f" (d));
79 return (int) (nExp - 0xffff);
81 #endif // #if CDS_OS_TYPE != CDS_OS_HPUX
83 }} // namespace gcc::ia64
85 using namespace gcc::ia64;
87 }}} // namespace cds::bitop::platform
90 #endif // #ifndef CDSLIB_COMPILER_GCC_IA64_BITOP_H