| 1 | // RUN: %clang_builtins %s %librt -o %t && %run %t |
|---|
| 2 | // REQUIRES: librt_has_floatundisf |
|---|
| 3 | |
|---|
| 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 type |
|---|
| 12 | |
|---|
| 13 | // seee eeee emmm mmmm mmmm mmmm mmmm mmmm |
|---|
| 14 | |
|---|
| 15 | COMPILER_RT_ABI float __floatundisf(du_int a); |
|---|
| 16 | |
|---|
| 17 | int test__floatundisf(du_int a, float expected) |
|---|
| 18 | { |
|---|
| 19 | float x = __floatundisf(a); |
|---|
| 20 | if (x != expected) |
|---|
| 21 | printf(format: "error in __floatundisf(%llX) = %a, expected %a\n" , |
|---|
| 22 | a, x, expected); |
|---|
| 23 | return x != expected; |
|---|
| 24 | } |
|---|
| 25 | |
|---|
| 26 | char assumption_1[sizeof(du_int) == 2*sizeof(si_int)] = {0}; |
|---|
| 27 | char assumption_2[sizeof(du_int)*CHAR_BIT == 64] = {0}; |
|---|
| 28 | char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0}; |
|---|
| 29 | |
|---|
| 30 | int main() |
|---|
| 31 | { |
|---|
| 32 | if (test__floatundisf(a: 0, expected: 0.0F)) |
|---|
| 33 | return 1; |
|---|
| 34 | |
|---|
| 35 | if (test__floatundisf(a: 1, expected: 1.0F)) |
|---|
| 36 | return 1; |
|---|
| 37 | if (test__floatundisf(a: 2, expected: 2.0F)) |
|---|
| 38 | return 1; |
|---|
| 39 | |
|---|
| 40 | if (test__floatundisf(a: 0x7FFFFF8000000000ULL, expected: 0x1.FFFFFEp+62F)) |
|---|
| 41 | return 1; |
|---|
| 42 | if (test__floatundisf(a: 0x7FFFFF0000000000ULL, expected: 0x1.FFFFFCp+62F)) |
|---|
| 43 | return 1; |
|---|
| 44 | |
|---|
| 45 | if (test__floatundisf(a: 0x8000008000000000ULL, expected: 0x1p+63F)) |
|---|
| 46 | return 1; |
|---|
| 47 | if (test__floatundisf(a: 0x8000010000000000LL, expected: 0x1.000002p+63F)) |
|---|
| 48 | return 1; |
|---|
| 49 | |
|---|
| 50 | if (test__floatundisf(a: 0x8000000000000000LL, expected: 0x1p+63F)) |
|---|
| 51 | return 1; |
|---|
| 52 | if (test__floatundisf(a: 0x8000000000000001LL, expected: 0x1p+63F)) |
|---|
| 53 | return 1; |
|---|
| 54 | |
|---|
| 55 | if (test__floatundisf(a: 0xFFFFFFFFFFFFFFFELL, expected: 0x1p+64F)) |
|---|
| 56 | return 1; |
|---|
| 57 | if (test__floatundisf(a: 0xFFFFFFFFFFFFFFFFLL, expected: 0x1p+64F)) |
|---|
| 58 | return 1; |
|---|
| 59 | |
|---|
| 60 | if (test__floatundisf(a: 0x0007FB72E8000000LL, expected: 0x1.FEDCBAp+50F)) |
|---|
| 61 | return 1; |
|---|
| 62 | |
|---|
| 63 | if (test__floatundisf(a: 0x0007FB72EA000000LL, expected: 0x1.FEDCBAp+50F)) |
|---|
| 64 | return 1; |
|---|
| 65 | if (test__floatundisf(a: 0x0007FB72EB000000LL, expected: 0x1.FEDCBAp+50F)) |
|---|
| 66 | return 1; |
|---|
| 67 | if (test__floatundisf(a: 0x0007FB72EBFFFFFFLL, expected: 0x1.FEDCBAp+50F)) |
|---|
| 68 | return 1; |
|---|
| 69 | if (test__floatundisf(a: 0x0007FB72EC000000LL, expected: 0x1.FEDCBCp+50F)) |
|---|
| 70 | return 1; |
|---|
| 71 | if (test__floatundisf(a: 0x0007FB72E8000001LL, expected: 0x1.FEDCBAp+50F)) |
|---|
| 72 | return 1; |
|---|
| 73 | |
|---|
| 74 | if (test__floatundisf(a: 0x0007FB72E6000000LL, expected: 0x1.FEDCBAp+50F)) |
|---|
| 75 | return 1; |
|---|
| 76 | if (test__floatundisf(a: 0x0007FB72E7000000LL, expected: 0x1.FEDCBAp+50F)) |
|---|
| 77 | return 1; |
|---|
| 78 | if (test__floatundisf(a: 0x0007FB72E7FFFFFFLL, expected: 0x1.FEDCBAp+50F)) |
|---|
| 79 | return 1; |
|---|
| 80 | if (test__floatundisf(a: 0x0007FB72E4000001LL, expected: 0x1.FEDCBAp+50F)) |
|---|
| 81 | return 1; |
|---|
| 82 | if (test__floatundisf(a: 0x0007FB72E4000000LL, expected: 0x1.FEDCB8p+50F)) |
|---|
| 83 | return 1; |
|---|
| 84 | |
|---|
| 85 | return 0; |
|---|
| 86 | } |
|---|
| 87 | |
|---|
