<s> from copperhead import * <EOL> import numpy as np <EOL> import plac <EOL> @ cu <EOL> def radix_sort ( A , bits , lsb ) : <EOL> """<STR_LIT>""" <EOL> def delta ( flag , ones_before , zeros_after ) : <EOL> if flag == <NUM_LIT:0> : return - ones_before <EOL> else : return + zeros_after <EOL> if lsb >= bits : <EOL> return A <EOL> else : <EOL> flags = map ( lambda x : int64 ( ( x >> lsb ) & <NUM_LIT:1> ) , A ) <EOL> ones = scan ( op_add , flags ) <EOL> zeros = rscan ( op_add , [ f ^ <NUM_LIT:1> for f in flags ] ) <EOL> offsets = map ( delta , flags , ones , zeros ) <EOL> bit_sorted = permute ( A , map ( op_add , indices ( A ) , offsets ) ) <EOL> return radix_sort ( bit_sorted , bits , lsb + <NUM_LIT:1> ) <EOL> def radix_sort8 ( A ) : return radix_sort ( A , np . int32 ( <NUM_LIT:8> ) , np . int32 ( <NUM_LIT:0> ) ) <EOL> def radix_sort32 ( A ) : return radix_sort ( A , np . int32 ( <NUM_LIT:32> ) , np . int32 ( <NUM_LIT:0> ) ) <EOL> @ plac . annotations ( n = "<STR_LIT>" ) <EOL> def main ( n = <NUM_LIT> ) : <EOL> """<STR_LIT>""" <EOL> def random_numbers ( n , bits = <NUM_LIT:8> ) : <EOL> import random <EOL> return [ np . int32 ( random . getrandbits ( bits ) ) for i in xrange ( n ) ] <EOL> def test_sort ( S , n = <NUM_LIT> , trials = <NUM_LIT:50> , bits = <NUM_LIT:8> ) : <EOL> npass , nfail = <NUM_LIT:0> , <NUM_LIT:0> <EOL> name = S . __name__ <EOL> for i in xrange ( trials ) : <EOL> data_in = random_numbers ( n , bits ) <EOL> gold = sorted ( data_in ) <EOL> data_out = S ( data_in ) <EOL> if list ( gold ) == list ( data_out ) : <EOL> npass = npass + <NUM_LIT:1> <EOL> else : <EOL> nfail = nfail + <NUM_LIT:1> <EOL> print ( "<STR_LIT>" % ( name , npass , nfail ) ) , <EOL> print <EOL> print <EOL> print "<STR_LIT>" <EOL> with places . here : <EOL> test_sort ( radix_sort8 , n = <NUM_LIT> ) <EOL> print "<STR_LIT>" <EOL> with places . gpu0 : <EOL> test_sort ( radix_sort8 , n = <NUM_LIT> ) <EOL> if __name__ == '<STR_LIT:__main__>' : <EOL> plac . call ( main ) </s>
