clzti2_test.c revision 1.1.1.2
1//===-- clzti2_test.c - Test __clzti2 -------------------------------------===// 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 __clzti2 for the compiler_rt library. 11// 12//===----------------------------------------------------------------------===// 13 14#include "int_lib.h" 15#include <stdio.h> 16 17#ifdef CRT_HAS_128BIT 18 19// Returns: the number of leading 0-bits 20 21// Precondition: a != 0 22 23si_int __clzti2(ti_int a); 24 25int test__clzti2(ti_int a, si_int expected) 26{ 27 si_int x = __clzti2(a); 28 if (x != expected) 29 { 30 twords at; 31 at.all = a; 32 printf("error in __clzti2(0x%llX%.16llX) = %d, expected %d\n", 33 at.s.high, at.s.low, x, expected); 34 } 35 return x != expected; 36} 37 38char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0}; 39 40#endif 41 42int main() 43{ 44#ifdef CRT_HAS_128BIT 45 const int N = (int)(sizeof(ti_int) * CHAR_BIT); 46 47 if (test__clzti2(0x00000001, N-1)) 48 return 1; 49 if (test__clzti2(0x00000002, N-2)) 50 return 1; 51 if (test__clzti2(0x00000003, N-2)) 52 return 1; 53 if (test__clzti2(0x00000004, N-3)) 54 return 1; 55 if (test__clzti2(0x00000005, N-3)) 56 return 1; 57 if (test__clzti2(0x0000000A, N-4)) 58 return 1; 59 if (test__clzti2(0x1000000A, N*3/4+3)) 60 return 1; 61 if (test__clzti2(0x2000000A, N*3/4+2)) 62 return 1; 63 if (test__clzti2(0x6000000A, N*3/4+1)) 64 return 1; 65 if (test__clzti2(0x8000000AuLL, N*3/4)) 66 return 1; 67 if (test__clzti2(0x000005008000000AuLL, 85)) 68 return 1; 69 if (test__clzti2(0x020005008000000AuLL, 70)) 70 return 1; 71 if (test__clzti2(0x720005008000000AuLL, 65)) 72 return 1; 73 if (test__clzti2(0x820005008000000AuLL, 64)) 74 return 1; 75 76 if (test__clzti2(make_ti(0x0000000080000000LL, 0x8000000800000000LL), 32)) 77 return 1; 78 if (test__clzti2(make_ti(0x0000000100000000LL, 0x8000000800000000LL), 31)) 79 return 1; 80 if (test__clzti2(make_ti(0x1000000100000000LL, 0x8000000800000000LL), 3)) 81 return 1; 82 if (test__clzti2(make_ti(0x7000000100000000LL, 0x8000000800000000LL), 1)) 83 return 1; 84 if (test__clzti2(make_ti(0x8000000100000000LL, 0x8000000800000000LL), 0)) 85 return 1; 86#else 87 printf("skipped\n"); 88#endif 89 return 0; 90} 91