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Remove unused nilsimsa code

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This commit is contained in:
Marcus Holland-Moritz 2023-09-04 18:53:32 +02:00
parent 54e5723f01
commit acc4e7d7b4
2 changed files with 0 additions and 35 deletions
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20
include/dwarfs/nilsimsa.h
View File

@ -27,19 +27,8 @@
#include <span> #include <span>
#include <type_traits> #include <type_traits>
#include <folly/lang/Bits.h>
#include "dwarfs/compiler.h" #include "dwarfs/compiler.h"
#define DWARFS_NILSIMSA_SIMILARITY(r, a, b) \
do { \
int bits = 0; \
for (int i = 0; i < 4; ++i) { \
bits += folly::popcount(a[i] ^ b[i]); \
} \
r 255 - bits; \
} while (false)
namespace dwarfs { namespace dwarfs {
class nilsimsa { class nilsimsa {
@ -52,15 +41,6 @@ class nilsimsa {
void update(uint8_t const* data, size_t size); void update(uint8_t const* data, size_t size);
void finalize(hash_type& hash) const; void finalize(hash_type& hash) const;
#ifdef DWARFS_MULTIVERSIONING
__attribute__((target("popcnt"))) static int
similarity(uint64_t const* a, uint64_t const* b);
__attribute__((target("default")))
#endif
static int
similarity(uint64_t const* a, uint64_t const* b);
void operator()(std::span<uint8_t const> data) { void operator()(std::span<uint8_t const> data) {
update(data.data(), data.size()); update(data.data(), data.size());
} }

15
src/dwarfs/nilsimsa.cpp
View File

@ -192,19 +192,4 @@ void nilsimsa::update(uint8_t const* data, size_t size) {
void nilsimsa::finalize(hash_type& hash) const { impl_->finalize(hash); } void nilsimsa::finalize(hash_type& hash) const { impl_->finalize(hash); }
#ifdef DWARFS_MULTIVERSIONING
__attribute__((target("popcnt"))) int
nilsimsa::similarity(uint64_t const* a, uint64_t const* b) {
DWARFS_NILSIMSA_SIMILARITY(return, a, b);
}
__attribute__((target("default")))
#endif
int nilsimsa::similarity(uint64_t const* a, uint64_t const* b) {
DWARFS_NILSIMSA_SIMILARITY(return, a, b);
}
static_assert(std::is_same_v<unsigned long, uint64_t> ||
std::is_same_v<unsigned long long, uint64_t>);
} // namespace dwarfs } // namespace dwarfs