1 //===-- clzdi2_test.c - Test __clzdi2 -------------------------------------===// 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 __clzdi2 for the compiler_rt library. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "int_lib.h" 15 #include <stdio.h> 16 17 // Returns: the number of leading 0-bits 18 19 // Precondition: a != 0 20 21 COMPILER_RT_ABI si_int __clzdi2(di_int a); 22 23 int test__clzdi2(di_int a, si_int expected) 24 { 25 si_int x = __clzdi2(a); 26 if (x != expected) 27 printf("error in __clzdi2(0x%llX) = %d, expected %d\n", a, x, expected); 28 return x != expected; 29 } 30 31 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0}; 32 33 int main() 34 { 35 const int N = (int)(sizeof(di_int) * CHAR_BIT); 36 // if (test__clzdi2(0x00000000, N)) // undefined 37 // return 1; 38 if (test__clzdi2(0x00000001, N-1)) 39 return 1; 40 if (test__clzdi2(0x00000002, N-2)) 41 return 1; 42 if (test__clzdi2(0x00000003, N-2)) 43 return 1; 44 if (test__clzdi2(0x00000004, N-3)) 45 return 1; 46 if (test__clzdi2(0x00000005, N-3)) 47 return 1; 48 if (test__clzdi2(0x0000000A, N-4)) 49 return 1; 50 if (test__clzdi2(0x1000000A, N/2+3)) 51 return 1; 52 if (test__clzdi2(0x2000000A, N/2+2)) 53 return 1; 54 if (test__clzdi2(0x6000000A, N/2+1)) 55 return 1; 56 if (test__clzdi2(0x8000000AuLL, N/2)) 57 return 1; 58 if (test__clzdi2(0x000005008000000AuLL, 21)) 59 return 1; 60 if (test__clzdi2(0x020005008000000AuLL, 6)) 61 return 1; 62 if (test__clzdi2(0x720005008000000AuLL, 1)) 63 return 1; 64 if (test__clzdi2(0x820005008000000AuLL, 0)) 65 return 1; 66 67 return 0; 68 } 69
