1 //===-- ffsti2_test.c - Test __ffsti2 -------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file tests __ffsti2 for the compiler_rt library. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #if __x86_64 15 16 #include "int_lib.h" 17 #include <stdio.h> 18 19 // Returns: the index of the least significant 1-bit in a, or 20 // the value zero if a is zero. The least significant bit is index one. 21 22 si_int __ffsti2(ti_int a); 23 24 int test__ffsti2(ti_int a, si_int expected) 25 { 26 si_int x = __ffsti2(a); 27 if (x != expected) 28 { 29 twords at; 30 at.all = a; 31 printf("error in __ffsti2(0x%llX%.16llX) = %d, expected %d\n", 32 at.s.high, at.s.low, x, expected); 33 } 34 return x != expected; 35 } 36 37 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0}; 38 39 #endif 40 41 int main() 42 { 43 #if __x86_64 44 if (test__ffsti2(0x00000000, 0)) 45 return 1; 46 if (test__ffsti2(0x00000001, 1)) 47 return 1; 48 if (test__ffsti2(0x00000002, 2)) 49 return 1; 50 if (test__ffsti2(0x00000003, 1)) 51 return 1; 52 if (test__ffsti2(0x00000004, 3)) 53 return 1; 54 if (test__ffsti2(0x00000005, 1)) 55 return 1; 56 if (test__ffsti2(0x0000000A, 2)) 57 return 1; 58 if (test__ffsti2(0x10000000, 29)) 59 return 1; 60 if (test__ffsti2(0x20000000, 30)) 61 return 1; 62 if (test__ffsti2(0x60000000, 30)) 63 return 1; 64 if (test__ffsti2(0x80000000uLL, 32)) 65 return 1; 66 if (test__ffsti2(0x0000050000000000uLL, 41)) 67 return 1; 68 if (test__ffsti2(0x0200080000000000uLL, 44)) 69 return 1; 70 if (test__ffsti2(0x7200000000000000uLL, 58)) 71 return 1; 72 if (test__ffsti2(0x8000000000000000uLL, 64)) 73 return 1; 74 if (test__ffsti2(make_ti(0x8000000800000000uLL, 0), 100)) 75 return 1; 76 if (test__ffsti2(make_ti(0x8000000000000000uLL, 0), 128)) 77 return 1; 78 79 #else 80 printf("skipped\n"); 81 #endif 82 return 0; 83 } 84
