93 lines · c
1// RUN: %clang_builtins %s %librt -o %t && %run %t2// REQUIRES: librt_has_fixunsdfsi3 4#include "int_lib.h"5#include <stdio.h>6 7// Returns: convert a to a unsigned int, rounding toward zero.8// Negative values all become zero.9 10// Assumption: double is a IEEE 64 bit floating point type 11// su_int is a 32 bit integral type12// value in double is representable in su_int or is negative 13// (no range checking performed)14 15// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm16 17COMPILER_RT_ABI su_int __fixunsdfsi(double a);18 19int test__fixunsdfsi(double a, su_int expected)20{21 su_int x = __fixunsdfsi(a);22 if (x != expected)23 printf("error in __fixunsdfsi(%A) = %X, expected %X\n", a, x, expected);24 return x != expected;25}26 27char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};28char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};29 30int main()31{32 if (test__fixunsdfsi(0.0, 0))33 return 1;34 35 if (test__fixunsdfsi(0.5, 0))36 return 1;37 if (test__fixunsdfsi(0.99, 0))38 return 1;39 if (test__fixunsdfsi(1.0, 1))40 return 1;41 if (test__fixunsdfsi(1.5, 1))42 return 1;43 if (test__fixunsdfsi(1.99, 1))44 return 1;45 if (test__fixunsdfsi(2.0, 2))46 return 1;47 if (test__fixunsdfsi(2.01, 2))48 return 1;49 if (test__fixunsdfsi(-0.5, 0))50 return 1;51 if (test__fixunsdfsi(-0.99, 0))52 return 1;53#if !TARGET_LIBGCC54 if (test__fixunsdfsi(-1.0, 0)) // libgcc ignores "returns 0 for negative input" spec55 return 1;56 if (test__fixunsdfsi(-1.5, 0))57 return 1;58 if (test__fixunsdfsi(-1.99, 0))59 return 1;60 if (test__fixunsdfsi(-2.0, 0))61 return 1;62 if (test__fixunsdfsi(-2.01, 0))63 return 1;64#endif65 66 if (test__fixunsdfsi(0x1.000000p+31, 0x80000000))67 return 1;68 if (test__fixunsdfsi(0x1.000000p+32, 0xFFFFFFFF))69 return 1;70 if (test__fixunsdfsi(0x1.FFFFFEp+31, 0xFFFFFF00))71 return 1;72 if (test__fixunsdfsi(0x1.FFFFFEp+30, 0x7FFFFF80))73 return 1;74 if (test__fixunsdfsi(0x1.FFFFFCp+30, 0x7FFFFF00))75 return 1;76 77#if !TARGET_LIBGCC78 if (test__fixunsdfsi(-0x1.FFFFFEp+30, 0))79 return 1;80 if (test__fixunsdfsi(-0x1.FFFFFCp+30, 0))81 return 1;82#endif83 84 if (test__fixunsdfsi(0x1.FFFFFFFEp+31, 0xFFFFFFFF))85 return 1;86 if (test__fixunsdfsi(0x1.FFFFFFFC00000p+30, 0x7FFFFFFF))87 return 1;88 if (test__fixunsdfsi(0x1.FFFFFFF800000p+30, 0x7FFFFFFE))89 return 1;90 91 return 0;92}93