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Being systematic about the flattening.

This commit is contained in:
Daniel Lemire 2018-07-26 16:36:35 -04:00
parent 93f4e1d9b4
commit a0c545e2c4
2 changed files with 58 additions and 0 deletions
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44
Makefile
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@ -19,6 +19,50 @@ all: $(EXECUTABLES)
parse: main.cpp common_defs.h linux-perf-events.h
$(CXX) $(CXXFLAGS) -o parse main.cpp
testflatten: parse parsenocheesy parsenodep2 parsenodep4 parsenodep6 parsenodep8 parsenodep10 parsenodep12 parsenodep14 parsenodep16
for filename in jsonexamples/twitter.json jsonexamples/gsoc-2018.json jsonexamples/citm_catalog.json jsonexamples/canada.json ; do \
echo $$filename ; \
set -x; \
./parse $$filename ; \
./parsenocheesy $$filename ; \
./parsenocheesy $$filename ; \
./parsenodep2 $$filename ; \
./parsenodep4 $$filename ; \
./parsenodep6 $$filename ; \
./parsenodep8 $$filename ; \
./parsenodep10 $$filename ; \
./parsenodep12 $$filename ; \
./parsenodep14 $$filename ; \
./parsenodep16 $$filename ; \
set +x; \
done
parsenocheesy: main.cpp common_defs.h linux-perf-events.h
$(CXX) $(CXXFLAGS) -o parsenocheesy main.cpp -DSUPPRESS_CHEESY_FLATTEN
parsenodep2: main.cpp common_defs.h linux-perf-events.h
$(CXX) $(CXXFLAGS) -o parsenodep2 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=2
parsenodep4: main.cpp common_defs.h linux-perf-events.h
$(CXX) $(CXXFLAGS) -o parsenodep4 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=4
parsenodep6: main.cpp common_defs.h linux-perf-events.h
$(CXX) $(CXXFLAGS) -o parsenodep6 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=6
parsenodep8: main.cpp common_defs.h linux-perf-events.h
$(CXX) $(CXXFLAGS) -o parsenodep8 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=8
parsenodep10: main.cpp common_defs.h linux-perf-events.h
$(CXX) $(CXXFLAGS) -o parsenodep10 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=10
parsenodep12: main.cpp common_defs.h linux-perf-events.h
$(CXX) $(CXXFLAGS) -o parsenodep12 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=12
parsenodep14: main.cpp common_defs.h linux-perf-events.h
$(CXX) $(CXXFLAGS) -o parsenodep14 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=14
parsenodep16: main.cpp common_defs.h linux-perf-events.h
$(CXX) $(CXXFLAGS) -o parsenodep16 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=16
clean:
rm -f $(EXECUTABLES)

14
main.cpp
View File

@ -296,6 +296,20 @@ never_inline bool flatten_indexes(size_t len, ParsedJson & pj) {
while (s) {
base_ptr[base++] = (u32)idx + __builtin_ctzll(s); s &= s - 1ULL;
}
#elif defined(NO_PDEP_PLEASE)
#ifndef NO_PDEP_WIDTH
#define NO_PDEP_WIDTH 6
#endif
u32 cnt = __builtin_popcountll(s);
u32 next_base = base + cnt;
while (s) {
for(size_t i = 0; i < NO_PDEP_WIDTH; i++) {
base_ptr[base+i] = (u32)idx + __builtin_ctzll(s);
s = s & (s - 1);
}
base += NO_PDEP_WIDTH;
}
base = next_base;
#else
u32 cnt = __builtin_popcountll(s);
u32 next_base = base + cnt;