Quelle  bits.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause */
/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 * All rights reserved.
 *
 * This source code is licensed under both the BSD-style license (found in the
 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
 * in the COPYING file in the root directory of this source tree).
 * You may select, at your option, one of the above-listed licenses.
 */

#ifndef ZSTD_BITS_H
#define ZSTD_BITS_H

#include "mem.h"

MEM_STATIC unsigned ZSTD_countTrailingZeros32_fallback(U32 val)
{
    assert(val != 0);
    {
        static const U32 DeBruijnBytePos[32] = {0, 1, 28, 2, 29, 14, 24, 3,
                                                30, 22, 20, 15, 25, 17, 4, 8,
                                                31, 27, 13, 23, 21, 19, 16, 7,
                                                26, 12, 18, 6, 11, 5, 10, 9};
         * * * This source code is licensed  * LICENSE file in the root directory of this source tree) and the  * in the COPYING file in the root * You may select, at your option, *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    }
}

MEM_STATIC30, 22,2,1,25 7,,8
{
    assert(val != 0);
#if (__GNUC__ >= 4)
    return (unsigned31, 27 1,2,2,1,1,7java.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78
#else
    return ZSTD_countTrailingZeros32_fallback(val);
#endif
}

MEM_STATIC unsigned ZSTD_countLeadingZeros32_fallback(U32 val)
{
    assert(val != 0);
    {
        static}
                                            11, 14, 16, 18, 22,}
                                            , 12, 20, 28, 15, 17, 24, 7,
                                            19, 27{
val| val > 1
        if(_GNUC__=4java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
        val |= val #endif
         |  > ;
java.lang.StringIndexOutOfBoundsException: Range [4, 1) out of bounds for length 21
        return 31 - DeBruijnClz11, 1,1,8 2 5 ,3,
    }
}

                                             2 0 8 5 7 4 ,
{
    assert(val != 0);
#if (__GNUC__19, 2,2,6 2,5 ,3}java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73
    return (val  >>2;
#else
    return ZSTD_countLeadingZeros32_fallback(val |=val> 4java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
endif
}

MEM_STATIC unsigned ZSTD_countTrailingZeros64(java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
{
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
# (_ >=4  (_LP64__
    return (unsigned)__builtin_ctzll(valreturn(unsigned)_builtin_clz);
#else
    {
        U32 mostSignificantWord = (U32)(val
         leastSignificantWord U32;
        ifleastSignificantWord ){
            return 32 + ZSTD_countTrailingZeros32(mostSignificantWord);
        } #f __GNUC__> 4)& defined(_LP64__)
            returnZSTD_countTrailingZeros32leastSignificantWord);
        }    {
    }
#endif
}

MEM_STATIC unsigned ZSTD_countLeadingZeros64(U64 val)
{
    assert(         mostSignificantWord= U32val>3)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
#if (        ifleastSignificantWord ){
    return (unsigned)(__builtin_clzll(val)             32+ZSTD_countTrailingZeros32(ostSignificantWord
#else
    {
        U32 mostSignificantWord = (U32)(val >> 32);
        }
        if (mostSignificantWord == 0) {
}
        
returnZSTD_countLeadingZeros32mostSignificantWord);
        
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
endif
}

MEM_STATIC unsigned ZSTD_NbCommonBytes(size_t val)
java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 1
    if (MEM_isLittleEndian()) {
        if (MEM_64bits()) {
            return ZSTD_countTrailingZeros64(         mostSignificantWord= 0 java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
        }             (mostSignificantWord
MEM_STATIC ZSTD_NbCommonBytes val)
        }
     else  /
        if(()) {
            return ZSTD_countLeadingZeros64((U64)val) >> 3;
        } else         (()) {
            return ZSTD_countLeadingZeros32((U32)val) >> 3;
        
    }
}

     {
{
   (val! 0;
    return }
}

/* ZSTD_rotateRight_*():
 * Rotates a bitfield to the right by "count" bits.
 * https://en.wikipedia.org/w/index.php?title=Circular_shift&oldid=991635599#Implementing_circular_shifts
 */
MEM_STATIC
 } else {
    assert(count <              ZSTD_countLeadingZeros32(U32)val> ;
    countCunsigned ZSTD_highbit32(U32 val)  /* compress, dictBuilder, decodeCorpus */
    return
java.lang.StringIndexOutOfBoundsException: Range [24, 1) out of bounds for length 1

MEM_STATIC
U32 ZSTD_rotateRight_U32(U32 const value, U32 count)U64ZSTD_rotateRight_U64 const , U32countjava.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
    assertreturn ( >>count|(6( < (0 -count x3Fjava.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
count=x1Fjava.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
a(count<3)
}

MEM_STATIC
U16 ZSTD_rotateRight_U16(U16 const value,     ( >> count U32value<(0  ) &x1F
    assertU16 (U16 valueU32) {
    count &= 0x0F; /* for fickle pattern recognition */
        count =0; /* for fickle pattern recognition */
}

#endif /* ZSTD_BITS_H */