1// RUN: %clang_builtins %s %librt -o %t && %run %t
2
3#define QUAD_PRECISION
4#include <fenv.h>
5#include <math.h>
6#include <stdio.h>
7#include "fp_lib.h"
8
9// Since we are comparing the compiler-rt IEEE implementation against libc's
10// long double implementation, this test can only succeed if long double
11// is an IEEE 128-bit floating point number.
12#if defined(CRT_HAS_TF_MODE) && defined(CRT_LDBL_IEEE_F128)
13
14int test__compiler_rt_fmaxl(fp_t x, fp_t y) {
15 fp_t crt_value = __compiler_rt_fmaxl(x, y);
16 fp_t libm_value = fmaxl(x, y);
17 // Consider +0 and -0 equal, and also disregard the sign/payload of two NaNs.
18 if (crt_value != libm_value &&
19 !(crt_isnan(crt_value) && crt_isnan(libm_value))) {
20 // Split expected values into two for printf
21 twords x_t, y_t, crt_value_t, libm_value_t;
22 x_t.all = toRep(x);
23 y_t.all = toRep(y);
24 crt_value_t.all = toRep(crt_value);
25 libm_value_t.all = toRep(libm_value);
26 printf(
27 "error: in __compiler_rt_fmaxl([%llX %llX], [%llX %llX]) = "
28 "[%llX %llX] != [%llX %llX]\n",
29 (unsigned long long)x_t.s.high, (unsigned long long)x_t.s.low,
30 (unsigned long long)y_t.s.high, (unsigned long long)y_t.s.low,
31 (unsigned long long)crt_value_t.s.high,
32 (unsigned long long)crt_value_t.s.low,
33 (unsigned long long)libm_value_t.s.high,
34 (unsigned long long)libm_value_t.s.low);
35 return 1;
36 }
37 return 0;
38}
39
40fp_t cases[] = {
41 -NAN, NAN, -INFINITY, INFINITY, -0.0, 0.0, -1, 1, -2, 2,
42 -0x1.0p-16383L, 0x1.0p-16383L, -0x1.0p-16384L, 0x1.0p-16384L, // subnormals
43 -1.001, 1.001, -1.002, 1.002,
44};
45
46int main() {
47 const unsigned N = sizeof(cases) / sizeof(cases[0]);
48 unsigned i, j;
49 for (i = 0; i < N; ++i) {
50 for (j = 0; j < N; ++j) {
51 if (test__compiler_rt_fmaxl(cases[i], cases[j])) return 1;
52 }
53 }
54 return 0;
55}
56#else
57int main() {
58 printf(format: "skipped\n");
59 return 0;
60}
61#endif
62

source code of compiler-rt/test/builtins/Unit/compiler_rt_fmaxl_test.c