87 lines · c
1// RUN: %clang_builtins %s %librt -o %t && %run %t2// REQUIRES: librt_has_floatundisf3 4#include "int_lib.h"5#include <float.h>6#include <stdio.h>7 8// Returns: convert a to a float, rounding toward even.9 10// Assumption: float is a IEEE 32 bit floating point type 11// du_int is a 64 bit integral type12 13// seee eeee emmm mmmm mmmm mmmm mmmm mmmm14 15COMPILER_RT_ABI float __floatundisf(du_int a);16 17int test__floatundisf(du_int a, float expected)18{19 float x = __floatundisf(a);20 if (x != expected)21 printf("error in __floatundisf(%llX) = %a, expected %a\n",22 a, x, expected);23 return x != expected;24}25 26char assumption_1[sizeof(du_int) == 2*sizeof(si_int)] = {0};27char assumption_2[sizeof(du_int)*CHAR_BIT == 64] = {0};28char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};29 30int main()31{32 if (test__floatundisf(0, 0.0F))33 return 1;34 35 if (test__floatundisf(1, 1.0F))36 return 1;37 if (test__floatundisf(2, 2.0F))38 return 1;39 40 if (test__floatundisf(0x7FFFFF8000000000ULL, 0x1.FFFFFEp+62F))41 return 1;42 if (test__floatundisf(0x7FFFFF0000000000ULL, 0x1.FFFFFCp+62F))43 return 1;44 45 if (test__floatundisf(0x8000008000000000ULL, 0x1p+63F))46 return 1;47 if (test__floatundisf(0x8000010000000000LL, 0x1.000002p+63F))48 return 1;49 50 if (test__floatundisf(0x8000000000000000LL, 0x1p+63F))51 return 1;52 if (test__floatundisf(0x8000000000000001LL, 0x1p+63F))53 return 1;54 55 if (test__floatundisf(0xFFFFFFFFFFFFFFFELL, 0x1p+64F))56 return 1;57 if (test__floatundisf(0xFFFFFFFFFFFFFFFFLL, 0x1p+64F))58 return 1;59 60 if (test__floatundisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))61 return 1;62 63 if (test__floatundisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))64 return 1;65 if (test__floatundisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))66 return 1;67 if (test__floatundisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))68 return 1;69 if (test__floatundisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))70 return 1;71 if (test__floatundisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))72 return 1;73 74 if (test__floatundisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))75 return 1;76 if (test__floatundisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))77 return 1;78 if (test__floatundisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))79 return 1;80 if (test__floatundisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))81 return 1;82 if (test__floatundisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))83 return 1;84 85 return 0;86}87