1 //===-- Unittests for fegetround and fesetround ---------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "src/fenv/fegetround.h"
10 #include "src/fenv/fesetround.h"
11 
12 #include "utils/UnitTest/Test.h"
13 
14 #include <fenv.h>
15 
16 TEST(LlvmLibcRoundingModeTest, SetAndGet) {
17   struct ResetDefaultRoundingMode {
18     int original;
19     ~ResetDefaultRoundingMode() {
20       __llvm_libc::fesetround(original);
21     }
22   } reset{__llvm_libc::fegetround()};
23 
24   int s = __llvm_libc::fesetround(FE_TONEAREST);
25   EXPECT_EQ(s, 0);
26   int rm = __llvm_libc::fegetround();
27   EXPECT_EQ(rm, FE_TONEAREST);
28 
29   s = __llvm_libc::fesetround(FE_UPWARD);
30   EXPECT_EQ(s, 0);
31   rm = __llvm_libc::fegetround();
32   EXPECT_EQ(rm, FE_UPWARD);
33 
34   s = __llvm_libc::fesetround(FE_DOWNWARD);
35   EXPECT_EQ(s, 0);
36   rm = __llvm_libc::fegetround();
37   EXPECT_EQ(rm, FE_DOWNWARD);
38 
39   s = __llvm_libc::fesetround(FE_TOWARDZERO);
40   EXPECT_EQ(s, 0);
41   rm = __llvm_libc::fegetround();
42   EXPECT_EQ(rm, FE_TOWARDZERO);
43 }
44