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roaring.h
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/*
* Amalgamated copy of CRoaring 0.2.66, modified for GTK to reduce compiler
* warnings.
*
* Copyright 2016-2020 The CRoaring authors
* Copyright 2020 Benjamin Otte
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
*/
/* begin file include/roaring/roaring_version.h */
// /include/roaring/roaring_version.h automatically generated by release.py, do not change by hand
#ifndef ROARING_INCLUDE_ROARING_VERSION
#define ROARING_INCLUDE_ROARING_VERSION
#define ROARING_VERSION = 0.2.66,
enum {
ROARING_VERSION_MAJOR = 0,
ROARING_VERSION_MINOR = 2,
ROARING_VERSION_REVISION = 66
};
#endif // ROARING_INCLUDE_ROARING_VERSION
/* end file include/roaring/roaring_version.h */
/* begin file include/roaring/portability.h */
/*
* portability.h
*
*/
#ifndef INCLUDE_PORTABILITY_H_
#define INCLUDE_PORTABILITY_H_
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS 1
#endif
#if !(defined(_POSIX_C_SOURCE)) || (_POSIX_C_SOURCE < 200809L)
#define _POSIX_C_SOURCE 200809L
#endif
#if !(defined(_XOPEN_SOURCE)) || (_XOPEN_SOURCE < 700)
#define _XOPEN_SOURCE 700
#endif
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h> // will provide posix_memalign with _POSIX_C_SOURCE as defined above
#if !(defined(__APPLE__)) && !(defined(__FreeBSD__)) && !(defined(__OpenBSD__))
#include <malloc.h> // this should never be needed but there are some reports that it is needed.
#endif
#if defined(_MSC_VER) && !defined(__clang__) && !defined(_WIN64) && !defined(ROARING_ACK_32BIT)
#pragma message( \
"You appear to be attempting a 32-bit build under Visual Studio. We recommend a 64-bit build instead.")
#endif
#if defined(__SIZEOF_LONG_LONG__) && __SIZEOF_LONG_LONG__ != 8
#error This code assumes 64-bit long longs (by use of the GCC intrinsics). Your system is not currently supported.
#endif
#if defined(_MSC_VER)
#define __restrict__ __restrict
#endif
#ifndef DISABLE_X64 // some users may want to compile as if they did not have
// an x64 processor
///////////////////////
/// We support X64 hardware in the following manner:
///
/// if IS_X64 is defined then we have at least SSE and SSE2
/// (All Intel processors sold in the recent past have at least SSE and SSE2 support,
/// going back to the Pentium 4.)
///
/// if USESSE4 is defined then we assume at least SSE4.2, SSE4.1,
/// SSSE3, SSE3... + IS_X64
/// if USEAVX is defined, then we assume AVX2, AVX + USESSE4
///
/// So if you have hardware that supports AVX but not AVX2, then "USEAVX"
/// won't be enabled.
/// If you have hardware that supports SSE4.1, but not SSE4.2, then USESSE4
/// won't be defined.
//////////////////////
// unless DISABLEAVX was defined, if we have __AVX2__, we enable AVX
#if (!defined(USEAVX)) && (!defined(DISABLEAVX)) && (defined(__AVX2__))
#define USEAVX
#endif
// if we have __SSE4_2__, we enable SSE4
#if (defined(__POPCNT__)) && (defined(__SSE4_2__))
#define USESSE4
#endif
#if defined(USEAVX) || defined(__x86_64__) || defined(_M_X64)
// we have an x64 processor
#define IS_X64
// we include the intrinsic header
#ifndef _MSC_VER
/* Non-Microsoft C/C++-compatible compiler */
#include <x86intrin.h> // on some recent GCC, this will declare posix_memalign
#endif
#endif
#if !defined(USENEON) && !defined(DISABLENEON) && defined(__ARM_NEON)
# define USENEON
#endif
#if defined(USENEON)
# include <arm_neon.h>
#endif
#ifndef _MSC_VER
/* Non-Microsoft C/C++-compatible compiler, assumes that it supports inline
* assembly */
#define ROARING_INLINE_ASM
#endif
#ifdef USEAVX
#define USESSE4 // if we have AVX, then we have SSE4
#define USE_BMI // we assume that AVX2 and BMI go hand and hand
#define USEAVX2FORDECODING // optimization
// vector operations should work on not just AVX
#define ROARING_VECTOR_OPERATIONS_ENABLED // vector unions (optimization)
#endif
#endif // DISABLE_X64
#ifdef _MSC_VER
/* Microsoft C/C++-compatible compiler */
#include <intrin.h>
#ifndef __clang__ // if one compiles with MSVC *with* clang, then these
// intrinsics are defined!!!
// sadly there is no way to check whether we are missing these intrinsics
// specifically.
/* wrappers for Visual Studio built-ins that look like gcc built-ins */
/* result might be undefined when input_num is zero */
static inline int __builtin_ctzll(unsigned long long input_num) {
unsigned long index;
#ifdef _WIN64 // highly recommended!!!
_BitScanForward64(&index, input_num);
#else // if we must support 32-bit Windows
if ((uint32_t)input_num != 0) {
_BitScanForward(&index, (uint32_t)input_num);
} else {
_BitScanForward(&index, (uint32_t)(input_num >> 32));
index += 32;
}
#endif
return index;
}
/* result might be undefined when input_num is zero */
static inline int __builtin_clzll(unsigned long long input_num) {
unsigned long index;
#ifdef _WIN64 // highly recommended!!!
_BitScanReverse64(&index, input_num);
#else // if we must support 32-bit Windows
if (input_num > 0xFFFFFFFF) {
_BitScanReverse(&index, (uint32_t)(input_num >> 32));
index += 32;
} else {
_BitScanReverse(&index, (uint32_t)(input_num));
}
#endif
return 63 - index;
}
/* result might be undefined when input_num is zero */
#ifdef USESSE4
/* POPCNT support was added to processors around the release of SSE4.2 */
/* USESSE4 flag guarantees POPCNT support */
static inline int __builtin_popcountll(unsigned long long input_num) {
#ifdef _WIN64 // highly recommended!!!
return (int)__popcnt64(input_num);
#else // if we must support 32-bit Windows
return (int)(__popcnt((uint32_t)input_num) +
__popcnt((uint32_t)(input_num >> 32)));
#endif
}
#else
/* software implementation avoids POPCNT */
static inline int __builtin_popcountll(unsigned long long input_num) {
const uint64_t m1 = 0x5555555555555555; //binary: 0101...
const uint64_t m2 = 0x3333333333333333; //binary: 00110011..
const uint64_t m4 = 0x0f0f0f0f0f0f0f0f; //binary: 4 zeros, 4 ones ...
const uint64_t h01 = 0x0101010101010101; //the sum of 256 to the power of 0,1,2,3...
input_num -= (input_num >> 1) & m1;
input_num = (input_num & m2) + ((input_num >> 2) & m2);
input_num = (input_num + (input_num >> 4)) & m4;
return (input_num * h01) >> 56;
}
#endif
/* Use #define so this is effective even under /Ob0 (no inline) */
#define __builtin_unreachable() __assume(0)
#endif
#endif
// portable version of posix_memalign
static inline void *roaring_bitmap_aligned_malloc(size_t alignment, size_t size) {
void *p;
#ifdef _MSC_VER
p = _aligned_malloc(size, alignment);
#elif defined(__MINGW32__) || defined(__MINGW64__)
p = __mingw_aligned_malloc(size, alignment);
#else
// somehow, if this is used before including "x86intrin.h", it creates an
// implicit defined warning.
if (posix_memalign(&p, alignment, size) != 0) return NULL;
#endif
return p;
}
static inline void roaring_bitmap_aligned_free(void *memblock) {
#ifdef _MSC_VER
_aligned_free(memblock);
#elif defined(__MINGW32__) || defined(__MINGW64__)
__mingw_aligned_free(memblock);
#else
free(memblock);
#endif
}
#if defined(_MSC_VER)
#define ALIGNED(x) __declspec(align(x))
#else
#if defined(__GNUC__)
#define ALIGNED(x) __attribute__((aligned(x)))
#endif
#endif
#ifdef __GNUC__
#define WARN_UNUSED __attribute__((warn_unused_result))
#else
#define WARN_UNUSED
#endif
#define IS_BIG_ENDIAN (*(uint16_t *)"\0\xff" < 0x100)
static inline int hamming(uint64_t x) {
#ifdef USESSE4
return (int) _mm_popcnt_u64(x);
#else
// won't work under visual studio, but hopeful we have _mm_popcnt_u64 in
// many cases
return __builtin_popcountll(x);
#endif
}
#ifndef UINT64_C
#define UINT64_C(c) (c##ULL)
#endif
#ifndef UINT32_C
#define UINT32_C(c) (c##UL)
#endif
#endif /* INCLUDE_PORTABILITY_H_ */
/* end file include/roaring/portability.h */
/* begin file include/roaring/containers/perfparameters.h */
#ifndef PERFPARAMETERS_H_
#define PERFPARAMETERS_H_
#include <stdbool.h>
/**
During lazy computations, we can transform array containers into bitset
containers as
long as we can expect them to have ARRAY_LAZY_LOWERBOUND values.
*/
enum { ARRAY_LAZY_LOWERBOUND = 1024 };
/* default initial size of a run container
setting it to zero delays the malloc.*/
enum { RUN_DEFAULT_INIT_SIZE = 0 };
/* default initial size of an array container
setting it to zero delays the malloc */
enum { ARRAY_DEFAULT_INIT_SIZE = 0 };
/* automatic bitset conversion during lazy or */
#ifndef LAZY_OR_BITSET_CONVERSION
#define LAZY_OR_BITSET_CONVERSION true
#endif
/* automatically attempt to convert a bitset to a full run during lazy
* evaluation */
#ifndef LAZY_OR_BITSET_CONVERSION_TO_FULL
#define LAZY_OR_BITSET_CONVERSION_TO_FULL true
#endif
/* automatically attempt to convert a bitset to a full run */
#ifndef OR_BITSET_CONVERSION_TO_FULL
#define OR_BITSET_CONVERSION_TO_FULL true
#endif
#endif
/* end file include/roaring/containers/perfparameters.h */
/* begin file include/roaring/array_util.h */
#ifndef ARRAY_UTIL_H
#define ARRAY_UTIL_H
#include <stddef.h> // for size_t
#include <stdint.h>
/*
* Good old binary search.
* Assumes that array is sorted, has logarithmic complexity.
* if the result is x, then:
* if ( x>0 ) you have array[x] = ikey
* if ( x<0 ) then inserting ikey at position -x-1 in array (insuring that array[-x-1]=ikey)
* keys the array sorted.
*/
static inline int32_t binarySearch(const uint16_t *array, int32_t lenarray,
uint16_t ikey) {
int32_t low = 0;
int32_t high = lenarray - 1;
while (low <= high) {
int32_t middleIndex = (low + high) >> 1;
uint16_t middleValue = array[middleIndex];
if (middleValue < ikey) {
low = middleIndex + 1;
} else if (middleValue > ikey) {
high = middleIndex - 1;
} else {
return middleIndex;
}
}
return -(low + 1);
}
/**
* Galloping search
* Assumes that array is sorted, has logarithmic complexity.
* if the result is x, then if x = length, you have that all values in array between pos and length
* are smaller than min.
* otherwise returns the first index x such that array[x] >= min.
*/
static inline int32_t advanceUntil(const uint16_t *array, int32_t pos,
int32_t length, uint16_t min) {
int32_t lower = pos + 1;
if ((lower >= length) || (array[lower] >= min)) {
return lower;
}
int32_t spansize = 1;
while ((lower + spansize < length) && (array[lower + spansize] < min)) {
spansize <<= 1;
}
int32_t upper = (lower + spansize < length) ? lower + spansize : length - 1;
if (array[upper] == min) {
return upper;
}
if (array[upper] < min) {
// means
// array
// has no
// item
// >= min
// pos = array.length;
return length;
}
// we know that the next-smallest span was too small
lower += (spansize >> 1);
int32_t mid = 0;
while (lower + 1 != upper) {
mid = (lower + upper) >> 1;
if (array[mid] == min) {
return mid;
} else if (array[mid] < min) {
lower = mid;
} else {
upper = mid;
}
}
return upper;
}
/**
* Returns number of elements which are less then $ikey.
* Array elements must be unique and sorted.
*/
static inline int32_t count_less(const uint16_t *array, int32_t lenarray,
uint16_t ikey) {
if (lenarray == 0) return 0;
int32_t pos = binarySearch(array, lenarray, ikey);
return pos >= 0 ? pos : -(pos+1);
}
/**
* Returns number of elements which are greater then $ikey.
* Array elements must be unique and sorted.
*/
static inline int32_t count_greater(const uint16_t *array, int32_t lenarray,
uint16_t ikey) {
if (lenarray == 0) return 0;
int32_t pos = binarySearch(array, lenarray, ikey);
if (pos >= 0) {
return lenarray - (pos+1);
} else {
return lenarray - (-pos-1);
}
}
/**
* From Schlegel et al., Fast Sorted-Set Intersection using SIMD Instructions
* Optimized by D. Lemire on May 3rd 2013
*
* C should have capacity greater than the minimum of s_1 and s_b + 8
* where 8 is sizeof(__m128i)/sizeof(uint16_t).
*/
int32_t intersect_vector16(const uint16_t *__restrict__ A, size_t s_a,
const uint16_t *__restrict__ B, size_t s_b,
uint16_t *C);
/**
* Compute the cardinality of the intersection using SSE4 instructions
*/
int32_t intersect_vector16_cardinality(const uint16_t *__restrict__ A,
size_t s_a,
const uint16_t *__restrict__ B,
size_t s_b);
/* Computes the intersection between one small and one large set of uint16_t.
* Stores the result into buffer and return the number of elements. */
int32_t intersect_skewed_uint16(const uint16_t *smallarray, size_t size_s,
const uint16_t *largearray, size_t size_l,
uint16_t *buffer);
/* Computes the size of the intersection between one small and one large set of
* uint16_t. */
int32_t intersect_skewed_uint16_cardinality(const uint16_t *smallarray,
size_t size_s,
const uint16_t *largearray,
size_t size_l);
/* Check whether the size of the intersection between one small and one large set of uint16_t is non-zero. */
bool intersect_skewed_uint16_nonempty(const uint16_t *smallarray, size_t size_s,
const uint16_t *largearray, size_t size_l);
/**
* Generic intersection function.
*/
int32_t intersect_uint16(const uint16_t *A, const size_t lenA,
const uint16_t *B, const size_t lenB, uint16_t *out);
/**
* Compute the size of the intersection (generic).
*/
int32_t intersect_uint16_cardinality(const uint16_t *A, const size_t lenA,
const uint16_t *B, const size_t lenB);
/**
* Checking whether the size of the intersection is non-zero.
*/
bool intersect_uint16_nonempty(const uint16_t *A, const size_t lenA,
const uint16_t *B, const size_t lenB);
/**
* Generic union function.
*/
size_t union_uint16(const uint16_t *set_1, size_t size_1, const uint16_t *set_2,
size_t size_2, uint16_t *buffer);
/**
* Generic XOR function.
*/
int32_t xor_uint16(const uint16_t *array_1, int32_t card_1,
const uint16_t *array_2, int32_t card_2, uint16_t *out);
/**
* Generic difference function (ANDNOT).
*/
int difference_uint16(const uint16_t *a1, int length1, const uint16_t *a2,
int length2, uint16_t *a_out);
/**
* Generic intersection function.
*/
size_t intersection_uint32(const uint32_t *A, const size_t lenA,
const uint32_t *B, const size_t lenB, uint32_t *out);
/**
* Generic intersection function, returns just the cardinality.
*/
size_t intersection_uint32_card(const uint32_t *A, const size_t lenA,
const uint32_t *B, const size_t lenB);
/**
* Generic union function.
*/
size_t union_uint32(const uint32_t *set_1, size_t size_1, const uint32_t *set_2,
size_t size_2, uint32_t *buffer);
/**
* A fast SSE-based union function.
*/
uint32_t union_vector16(const uint16_t *__restrict__ set_1, uint32_t size_1,
const uint16_t *__restrict__ set_2, uint32_t size_2,
uint16_t *__restrict__ buffer);
/**
* A fast SSE-based XOR function.
*/
uint32_t xor_vector16(const uint16_t *__restrict__ array1, uint32_t length1,
const uint16_t *__restrict__ array2, uint32_t length2,
uint16_t *__restrict__ output);
/**
* A fast SSE-based difference function.
*/
int32_t difference_vector16(const uint16_t *__restrict__ A, size_t s_a,
const uint16_t *__restrict__ B, size_t s_b,
uint16_t *C);
/**
* Generic union function, returns just the cardinality.
*/
size_t union_uint32_card(const uint32_t *set_1, size_t size_1,
const uint32_t *set_2, size_t size_2);
/**
* combines union_uint16 and union_vector16 optimally
*/
size_t fast_union_uint16(const uint16_t *set_1, size_t size_1, const uint16_t *set_2,
size_t size_2, uint16_t *buffer);
bool memequals(const void *s1, const void *s2, size_t n);
#endif
/* end file include/roaring/array_util.h */
/* begin file include/roaring/roaring_types.h */
/*
Typedefs used by various components
*/
#ifndef ROARING_TYPES_H
#define ROARING_TYPES_H
typedef bool (*roaring_iterator)(uint32_t value, void *param);
typedef bool (*roaring_iterator64)(uint64_t value, void *param);
/**
* (For advanced users.)
* The roaring_statistics_t can be used to collect detailed statistics about
* the composition of a roaring bitmap.
*/
typedef struct roaring_statistics_s {
uint32_t n_containers; /* number of containers */
uint32_t n_array_containers; /* number of array containers */
uint32_t n_run_containers; /* number of run containers */
uint32_t n_bitset_containers; /* number of bitmap containers */
uint32_t
n_values_array_containers; /* number of values in array containers */
uint32_t n_values_run_containers; /* number of values in run containers */
uint32_t
n_values_bitset_containers; /* number of values in bitmap containers */
uint32_t n_bytes_array_containers; /* number of allocated bytes in array
containers */
uint32_t n_bytes_run_containers; /* number of allocated bytes in run
containers */
uint32_t n_bytes_bitset_containers; /* number of allocated bytes in bitmap
containers */
uint32_t
max_value; /* the maximal value, undefined if cardinality is zero */
uint32_t
min_value; /* the minimal value, undefined if cardinality is zero */
uint64_t sum_value; /* the sum of all values (could be used to compute
average) */
uint64_t cardinality; /* total number of values stored in the bitmap */
// and n_values_arrays, n_values_rle, n_values_bitmap
} roaring_statistics_t;
#endif /* ROARING_TYPES_H */
/* end file include/roaring/roaring_types.h */
/* begin file include/roaring/utilasm.h */
/*
* utilasm.h
*
*/
#ifndef INCLUDE_UTILASM_H_
#define INCLUDE_UTILASM_H_
#if defined(USE_BMI) & defined(ROARING_INLINE_ASM)
#define ASMBITMANIPOPTIMIZATION // optimization flag
#define ASM_SHIFT_RIGHT(srcReg, bitsReg, destReg) \
__asm volatile("shrx %1, %2, %0" \
: "=r"(destReg) \
: /* write */ \
"r"(bitsReg), /* read only */ \
"r"(srcReg) /* read only */ \
)
#define ASM_INPLACESHIFT_RIGHT(srcReg, bitsReg) \
__asm volatile("shrx %1, %0, %0" \
: "+r"(srcReg) \
: /* read/write */ \
"r"(bitsReg) /* read only */ \
)
#define ASM_SHIFT_LEFT(srcReg, bitsReg, destReg) \
__asm volatile("shlx %1, %2, %0" \
: "=r"(destReg) \
: /* write */ \
"r"(bitsReg), /* read only */ \
"r"(srcReg) /* read only */ \
)
// set bit at position testBit within testByte to 1 and
// copy cmovDst to cmovSrc if that bit was previously clear
#define ASM_SET_BIT_INC_WAS_CLEAR(testByte, testBit, count) \
__asm volatile( \
"bts %2, %0\n" \
"sbb $-1, %1\n" \
: "+r"(testByte), /* read/write */ \
"+r"(count) \
: /* read/write */ \
"r"(testBit) /* read only */ \
)
#define ASM_CLEAR_BIT_DEC_WAS_SET(testByte, testBit, count) \
__asm volatile( \
"btr %2, %0\n" \
"sbb $0, %1\n" \
: "+r"(testByte), /* read/write */ \
"+r"(count) \
: /* read/write */ \
"r"(testBit) /* read only */ \
)
#define ASM_BT64(testByte, testBit, count) \
__asm volatile( \
"bt %2,%1\n" \
"sbb %0,%0" /*could use setb */ \
: "=r"(count) \
: /* write */ \
"r"(testByte), /* read only */ \
"r"(testBit) /* read only */ \
)
#endif // USE_BMI
#endif /* INCLUDE_UTILASM_H_ */
/* end file include/roaring/utilasm.h */
/* begin file include/roaring/bitset_util.h */
#ifndef BITSET_UTIL_H
#define BITSET_UTIL_H
#include <stdint.h>
/*
* Set all bits in indexes [begin,end) to true.
*/
static inline void bitset_set_range(uint64_t *bitmap, uint32_t start,
uint32_t end) {
if (start == end) return;
uint32_t firstword = start / 64;
uint32_t endword = (end - 1) / 64;
if (firstword == endword) {
bitmap[firstword] |= ((~UINT64_C(0)) << (start % 64)) &
((~UINT64_C(0)) >> ((~end + 1) % 64));
return;
}
bitmap[firstword] |= (~UINT64_C(0)) << (start % 64);
for (uint32_t i = firstword + 1; i < endword; i++) bitmap[i] = ~UINT64_C(0);
bitmap[endword] |= (~UINT64_C(0)) >> ((~end + 1) % 64);
}
/*
* Find the cardinality of the bitset in [begin,begin+lenminusone]
*/
static inline int bitset_lenrange_cardinality(uint64_t *bitmap, uint32_t start,
uint32_t lenminusone) {
uint32_t firstword = start / 64;
uint32_t endword = (start + lenminusone) / 64;
if (firstword == endword) {
return hamming(bitmap[firstword] &
((~UINT64_C(0)) >> ((63 - lenminusone) % 64))
<< (start % 64));
}
int answer = hamming(bitmap[firstword] & ((~UINT64_C(0)) << (start % 64)));
for (uint32_t i = firstword + 1; i < endword; i++) {
answer += hamming(bitmap[i]);
}
answer +=
hamming(bitmap[endword] &
(~UINT64_C(0)) >> (((~start + 1) - lenminusone - 1) % 64));
return answer;
}
/*
* Check whether the cardinality of the bitset in [begin,begin+lenminusone] is 0
*/
static inline bool bitset_lenrange_empty(uint64_t *bitmap, uint32_t start,
uint32_t lenminusone) {
uint32_t firstword = start / 64;
uint32_t endword = (start + lenminusone) / 64;
if (firstword == endword) {
return (bitmap[firstword] & ((~UINT64_C(0)) >> ((63 - lenminusone) % 64))
<< (start % 64)) == 0;
}
if(((bitmap[firstword] & ((~UINT64_C(0)) << (start%64)))) != 0) return false;
for (uint32_t i = firstword + 1; i < endword; i++) {
if(bitmap[i] != 0) return false;
}
if((bitmap[endword] & (~UINT64_C(0)) >> (((~start + 1) - lenminusone - 1) % 64)) != 0) return false;
return true;
}
/*
* Set all bits in indexes [begin,begin+lenminusone] to true.
*/
static inline void bitset_set_lenrange(uint64_t *bitmap, uint32_t start,
uint32_t lenminusone) {
uint32_t firstword = start / 64;
uint32_t endword = (start + lenminusone) / 64;
if (firstword == endword) {
bitmap[firstword] |= ((~UINT64_C(0)) >> ((63 - lenminusone) % 64))
<< (start % 64);
return;
}
uint64_t temp = bitmap[endword];
bitmap[firstword] |= (~UINT64_C(0)) << (start % 64);
for (uint32_t i = firstword + 1; i < endword; i += 2)
bitmap[i] = bitmap[i + 1] = ~UINT64_C(0);
bitmap[endword] =
temp | (~UINT64_C(0)) >> (((~start + 1) - lenminusone - 1) % 64);
}
/*
* Flip all the bits in indexes [begin,end).
*/
static inline void bitset_flip_range(uint64_t *bitmap, uint32_t start,
uint32_t end) {
if (start == end) return;
uint32_t firstword = start / 64;
uint32_t endword = (end - 1) / 64;
bitmap[firstword] ^= ~((~UINT64_C(0)) << (start % 64));
for (uint32_t i = firstword; i < endword; i++) bitmap[i] = ~bitmap[i];
bitmap[endword] ^= ((~UINT64_C(0)) >> ((~end + 1) % 64));
}
/*
* Set all bits in indexes [begin,end) to false.
*/
static inline void bitset_reset_range(uint64_t *bitmap, uint32_t start,
uint32_t end) {
if (start == end) return;
uint32_t firstword = start / 64;
uint32_t endword = (end - 1) / 64;
if (firstword == endword) {
bitmap[firstword] &= ~(((~UINT64_C(0)) << (start % 64)) &
((~UINT64_C(0)) >> ((~end + 1) % 64)));
return;
}
bitmap[firstword] &= ~((~UINT64_C(0)) << (start % 64));
for (uint32_t i = firstword + 1; i < endword; i++) bitmap[i] = UINT64_C(0);
bitmap[endword] &= ~((~UINT64_C(0)) >> ((~end + 1) % 64));
}
/*
* Given a bitset containing "length" 64-bit words, write out the position
* of all the set bits to "out", values start at "base".
*
* The "out" pointer should be sufficient to store the actual number of bits
* set.
*
* Returns how many values were actually decoded.
*
* This function should only be expected to be faster than
* bitset_extract_setbits
* when the density of the bitset is high.
*
* This function uses AVX2 decoding.
*/
size_t bitset_extract_setbits_avx2(uint64_t *bitset, size_t length, void *vout,
size_t outcapacity, uint32_t base);
/*
* Given a bitset containing "length" 64-bit words, write out the position
* of all the set bits to "out", values start at "base".
*
* The "out" pointer should be sufficient to store the actual number of bits
*set.
*
* Returns how many values were actually decoded.
*/
size_t bitset_extract_setbits(uint64_t *bitset, size_t length, void *vout,
uint32_t base);
/*
* Given a bitset containing "length" 64-bit words, write out the position
* of all the set bits to "out" as 16-bit integers, values start at "base" (can
*be set to zero)
*
* The "out" pointer should be sufficient to store the actual number of bits
*set.
*
* Returns how many values were actually decoded.
*
* This function should only be expected to be faster than
*bitset_extract_setbits_uint16
* when the density of the bitset is high.
*
* This function uses SSE decoding.
*/
size_t bitset_extract_setbits_sse_uint16(const uint64_t *bitset, size_t length,
uint16_t *out, size_t outcapacity,
uint16_t base);
/*
* Given a bitset containing "length" 64-bit words, write out the position
* of all the set bits to "out", values start at "base"
* (can be set to zero)
*
* The "out" pointer should be sufficient to store the actual number of bits
*set.
*
* Returns how many values were actually decoded.
*/
size_t bitset_extract_setbits_uint16(const uint64_t *bitset, size_t length,
uint16_t *out, uint16_t base);
/*
* Given two bitsets containing "length" 64-bit words, write out the position
* of all the common set bits to "out", values start at "base"
* (can be set to zero)
*
* The "out" pointer should be sufficient to store the actual number of bits
* set.
*
* Returns how many values were actually decoded.
*/
size_t bitset_extract_intersection_setbits_uint16(const uint64_t * __restrict__ bitset1,
const uint64_t * __restrict__ bitset2,
size_t length, uint16_t *out,
uint16_t base);
/*
* Given a bitset having cardinality card, set all bit values in the list (there
* are length of them)
* and return the updated cardinality. This evidently assumes that the bitset
* already contained data.
*/
uint64_t bitset_set_list_withcard(void *bitset, uint64_t card,
const uint16_t *list, uint64_t length);
/*
* Given a bitset, set all bit values in the list (there
* are length of them).
*/
void bitset_set_list(void *bitset, const uint16_t *list, uint64_t length);
/*
* Given a bitset having cardinality card, unset all bit values in the list
* (there are length of them)
* and return the updated cardinality. This evidently assumes that the bitset
* already contained data.
*/
uint64_t bitset_clear_list(void *bitset, uint64_t card, const uint16_t *list,
uint64_t length);
/*
* Given a bitset having cardinality card, toggle all bit values in the list
* (there are length of them)
* and return the updated cardinality. This evidently assumes that the bitset
* already contained data.
*/
uint64_t bitset_flip_list_withcard(void *bitset, uint64_t card,
const uint16_t *list, uint64_t length);
void bitset_flip_list(void *bitset, const uint16_t *list, uint64_t length);
#ifdef USEAVX
/***
* BEGIN Harley-Seal popcount functions.
*/
/**
* Compute the population count of a 256-bit word
* This is not especially fast, but it is convenient as part of other functions.
*/
static inline __m256i popcount256(__m256i v) {
const __m256i lookuppos = _mm256_setr_epi8(
/* 0 */ 4 + 0, /* 1 */ 4 + 1, /* 2 */ 4 + 1, /* 3 */ 4 + 2,
/* 4 */ 4 + 1, /* 5 */ 4 + 2, /* 6 */ 4 + 2, /* 7 */ 4 + 3,
/* 8 */ 4 + 1, /* 9 */ 4 + 2, /* a */ 4 + 2, /* b */ 4 + 3,
/* c */ 4 + 2, /* d */ 4 + 3, /* e */ 4 + 3, /* f */ 4 + 4,
/* 0 */ 4 + 0, /* 1 */ 4 + 1, /* 2 */ 4 + 1, /* 3 */ 4 + 2,
/* 4 */ 4 + 1, /* 5 */ 4 + 2, /* 6 */ 4 + 2, /* 7 */ 4 + 3,
/* 8 */ 4 + 1, /* 9 */ 4 + 2, /* a */ 4 + 2, /* b */ 4 + 3,
/* c */ 4 + 2, /* d */ 4 + 3, /* e */ 4 + 3, /* f */ 4 + 4);
const __m256i lookupneg = _mm256_setr_epi8(
/* 0 */ 4 - 0, /* 1 */ 4 - 1, /* 2 */ 4 - 1, /* 3 */ 4 - 2,
/* 4 */ 4 - 1, /* 5 */ 4 - 2, /* 6 */ 4 - 2, /* 7 */ 4 - 3,
/* 8 */ 4 - 1, /* 9 */ 4 - 2, /* a */ 4 - 2, /* b */ 4 - 3,
/* c */ 4 - 2, /* d */ 4 - 3, /* e */ 4 - 3, /* f */ 4 - 4,
/* 0 */ 4 - 0, /* 1 */ 4 - 1, /* 2 */ 4 - 1, /* 3 */ 4 - 2,
/* 4 */ 4 - 1, /* 5 */ 4 - 2, /* 6 */ 4 - 2, /* 7 */ 4 - 3,
/* 8 */ 4 - 1, /* 9 */ 4 - 2, /* a */ 4 - 2, /* b */ 4 - 3,
/* c */ 4 - 2, /* d */ 4 - 3, /* e */ 4 - 3, /* f */ 4 - 4);
const __m256i low_mask = _mm256_set1_epi8(0x0f);
const __m256i lo = _mm256_and_si256(v, low_mask);
const __m256i hi = _mm256_and_si256(_mm256_srli_epi16(v, 4), low_mask);
const __m256i popcnt1 = _mm256_shuffle_epi8(lookuppos, lo);
const __m256i popcnt2 = _mm256_shuffle_epi8(lookupneg, hi);
return _mm256_sad_epu8(popcnt1, popcnt2);
}
/**
* Simple CSA over 256 bits
*/
static inline void CSA(__m256i *h, __m256i *l, __m256i a, __m256i b,
__m256i c) {
const __m256i u = _mm256_xor_si256(a, b);
*h = _mm256_or_si256(_mm256_and_si256(a, b), _mm256_and_si256(u, c));
*l = _mm256_xor_si256(u, c);
}
/**
* Fast Harley-Seal AVX population count function
*/
inline static uint64_t avx2_harley_seal_popcount256(const __m256i *data,
const uint64_t size) {
__m256i total = _mm256_setzero_si256();
__m256i ones = _mm256_setzero_si256();
__m256i twos = _mm256_setzero_si256();
__m256i fours = _mm256_setzero_si256();
__m256i eights = _mm256_setzero_si256();
__m256i sixteens = _mm256_setzero_si256();
__m256i twosA, twosB, foursA, foursB, eightsA, eightsB;
const uint64_t limit = size - size % 16;
uint64_t i = 0;
for (; i < limit; i += 16) {
CSA(&twosA, &ones, ones, _mm256_lddqu_si256(data + i),
_mm256_lddqu_si256(data + i + 1));
CSA(&twosB, &ones, ones, _mm256_lddqu_si256(data + i + 2),
_mm256_lddqu_si256(data + i + 3));
CSA(&foursA, &twos, twos, twosA, twosB);
CSA(&twosA, &ones, ones, _mm256_lddqu_si256(data + i + 4),
_mm256_lddqu_si256(data + i + 5));
CSA(&twosB, &ones, ones, _mm256_lddqu_si256(data + i + 6),
_mm256_lddqu_si256(data + i + 7));
CSA(&foursB, &twos, twos, twosA, twosB);
CSA(&eightsA, &fours, fours, foursA, foursB);
CSA(&twosA, &ones, ones, _mm256_lddqu_si256(data + i + 8),
_mm256_lddqu_si256(data + i + 9));
CSA(&twosB, &ones, ones, _mm256_lddqu_si256(data + i + 10),
_mm256_lddqu_si256(data + i + 11));
CSA(&foursA, &twos, twos, twosA, twosB);
CSA(&twosA, &ones, ones, _mm256_lddqu_si256(data + i + 12),
_mm256_lddqu_si256(data + i + 13));
CSA(&twosB, &ones, ones, _mm256_lddqu_si256(data + i + 14),
_mm256_lddqu_si256(data + i + 15));
CSA(&foursB, &twos, twos, twosA, twosB);
CSA(&eightsB, &fours, fours, foursA, foursB);
CSA(&sixteens, &eights, eights, eightsA, eightsB);
total = _mm256_add_epi64(total, popcount256(sixteens));
}
total = _mm256_slli_epi64(total, 4); // * 16
total = _mm256_add_epi64(