86 lines · c
1// RUN: %clang_builtins %s %librt -o %t && %run %t2// REQUIRES: librt_has_floatdisf3 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// di_int is a 64 bit integral type12 13// seee eeee emmm mmmm mmmm mmmm mmmm mmmm14 15COMPILER_RT_ABI float __floatdisf(di_int a);16 17int test__floatdisf(di_int a, float expected)18{19 float x = __floatdisf(a);20 if (x != expected)21 printf("error in __floatdisf(%llX) = %a, expected %a\n",22 a, x, expected);23 return x != expected;24}25 26char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};27char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};28char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};29 30int main()31{32 if (test__floatdisf(0, 0.0F))33 return 1;34 35 if (test__floatdisf(1, 1.0F))36 return 1;37 if (test__floatdisf(2, 2.0F))38 return 1;39 if (test__floatdisf(-1, -1.0F))40 return 1;41 if (test__floatdisf(-2, -2.0F))42 return 1;43 44 if (test__floatdisf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62F))45 return 1;46 if (test__floatdisf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62F))47 return 1;48 49 if (test__floatdisf(0x8000008000000000LL, -0x1.FFFFFEp+62F))50 return 1;51 if (test__floatdisf(0x8000010000000000LL, -0x1.FFFFFCp+62F))52 return 1;53 54 if (test__floatdisf(0x8000000000000000LL, -0x1.000000p+63F))55 return 1;56 if (test__floatdisf(0x8000000000000001LL, -0x1.000000p+63F))57 return 1;58 59 if (test__floatdisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))60 return 1;61 62 if (test__floatdisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))63 return 1;64 if (test__floatdisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))65 return 1;66 if (test__floatdisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))67 return 1;68 if (test__floatdisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))69 return 1;70 if (test__floatdisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))71 return 1;72 73 if (test__floatdisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))74 return 1;75 if (test__floatdisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))76 return 1;77 if (test__floatdisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))78 return 1;79 if (test__floatdisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))80 return 1;81 if (test__floatdisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))82 return 1;83 84 return 0;85}86