128-bit

问题 I've been trying for days to install GMP library under MINGW. I have been using for weeks __uint128_t with gcc under a linux64 bit environment, then ported the same program under GMP and mingw (32 bit version). I used mpz_class integers instead of __uint128_t . Then I started my new program and...! With __uint128_t and 64 bit it takes 16 minutes to complete, with GMP and MINGW it takes 91 HOURS!!! What should I do to speed up things a bit? Is there any faster way to do 128 bit integer math

问题 I've been trying for days to install GMP library under MINGW. I have been using for weeks __uint128_t with gcc under a linux64 bit environment, then ported the same program under GMP and mingw (32 bit version). I used mpz_class integers instead of __uint128_t . Then I started my new program and...! With __uint128_t and 64 bit it takes 16 minutes to complete, with GMP and MINGW it takes 91 HOURS!!! What should I do to speed up things a bit? Is there any faster way to do 128 bit integer math

来源： https://stackoverflow.com/questions/7174419/uint128-t-on-mingw-gcc

来源： https://stackoverflow.com/questions/7174419/uint128-t-on-mingw-gcc

来源： https://stackoverflow.com/questions/7174419/uint128-t-on-mingw-gcc

问题 Is there any library already available in c or should I need to use an external library which will work for cooja simulator? I have tried the GMP library for Z mote. But that doesn't work for me. 来源： https://stackoverflow.com/questions/61010848/how-can-i-have-a-128-bit-integer-in-protothread-in-cooja-simulator

问题 Is there any library already available in c or should I need to use an external library which will work for cooja simulator? I have tried the GMP library for Z mote. But that doesn't work for me. 来源： https://stackoverflow.com/questions/61010848/how-can-i-have-a-128-bit-integer-in-protothread-in-cooja-simulator

问题 I'm confused with the usage of 128-bit integer. Please look at the test code: uint128_t test_data = 0x00000000FFFFFFFF0101010101010101; uint64_t test_data_h = test_data >> 64; uint64_t test_data_l = test_data ; printf("test_data 0x %016llx %016llx\n", test_data_h, test_data_l); I expect the test_data_h to be 0x00000000FFFFFFFF, but the result is : test data 0x 0000000000000000 0101010101010101 Why is this? 回答1: Many compilers do not support 128 bit constants. Instead // uint128_t test_data =

问题 I'm confused with the usage of 128-bit integer. Please look at the test code: uint128_t test_data = 0x00000000FFFFFFFF0101010101010101; uint64_t test_data_h = test_data >> 64; uint64_t test_data_l = test_data ; printf("test_data 0x %016llx %016llx\n", test_data_h, test_data_l); I expect the test_data_h to be 0x00000000FFFFFFFF, but the result is : test data 0x 0000000000000000 0101010101010101 Why is this? 回答1: Many compilers do not support 128 bit constants. Instead // uint128_t test_data =

问题 I'm confused with the usage of 128-bit integer. Please look at the test code: uint128_t test_data = 0x00000000FFFFFFFF0101010101010101; uint64_t test_data_h = test_data >> 64; uint64_t test_data_l = test_data ; printf("test_data 0x %016llx %016llx\n", test_data_h, test_data_l); I expect the test_data_h to be 0x00000000FFFFFFFF, but the result is : test data 0x 0000000000000000 0101010101010101 Why is this? 回答1: Many compilers do not support 128 bit constants. Instead // uint128_t test_data =