1 //===-- fixdfdi_test.c - Test __fixdfdi -----------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file tests __fixdfdi for the compiler_rt library. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "int_lib.h" 15 #include <stdio.h> 16 17 // Returns: convert a to a signed long long, rounding toward zero. 18 19 // Assumption: double is a IEEE 64 bit floating point type 20 // su_int is a 32 bit integral type 21 // value in double is representable in di_int (no range checking performed) 22 23 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm 24 25 di_int __fixdfdi(double a); 26 27 int test__fixdfdi(double a, di_int expected) 28 { 29 di_int x = __fixdfdi(a); 30 if (x != expected) 31 printf("error in __fixdfdi(%A) = %llX, expected %llX\n", a, x, expected); 32 return x != expected; 33 } 34 35 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0}; 36 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0}; 37 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0}; 38 39 int main() 40 { 41 if (test__fixdfdi(0.0, 0)) 42 return 1; 43 44 if (test__fixdfdi(0.5, 0)) 45 return 1; 46 if (test__fixdfdi(0.99, 0)) 47 return 1; 48 if (test__fixdfdi(1.0, 1)) 49 return 1; 50 if (test__fixdfdi(1.5, 1)) 51 return 1; 52 if (test__fixdfdi(1.99, 1)) 53 return 1; 54 if (test__fixdfdi(2.0, 2)) 55 return 1; 56 if (test__fixdfdi(2.01, 2)) 57 return 1; 58 if (test__fixdfdi(-0.5, 0)) 59 return 1; 60 if (test__fixdfdi(-0.99, 0)) 61 return 1; 62 if (test__fixdfdi(-1.0, -1)) 63 return 1; 64 if (test__fixdfdi(-1.5, -1)) 65 return 1; 66 if (test__fixdfdi(-1.99, -1)) 67 return 1; 68 if (test__fixdfdi(-2.0, -2)) 69 return 1; 70 if (test__fixdfdi(-2.01, -2)) 71 return 1; 72 73 if (test__fixdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL)) 74 return 1; 75 if (test__fixdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL)) 76 return 1; 77 78 if (test__fixdfdi(-0x1.FFFFFEp+62, 0x8000008000000000LL)) 79 return 1; 80 if (test__fixdfdi(-0x1.FFFFFCp+62, 0x8000010000000000LL)) 81 return 1; 82 83 if (test__fixdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL)) 84 return 1; 85 if (test__fixdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL)) 86 return 1; 87 88 if (test__fixdfdi(-0x1.FFFFFFFFFFFFFp+62, 0x8000000000000400LL)) 89 return 1; 90 if (test__fixdfdi(-0x1.FFFFFFFFFFFFEp+62, 0x8000000000000800LL)) 91 return 1; 92 93 return 0; 94 } 95
