[libc] [llvm] [libc][math][c23] Add asinbf16 math function (PR #184170)

[Mohamed Emad via llvm-commits]

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@@ -0,0 +1,54 @@
+//===-- Exhaustive test for asinbf16 --------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/__support/FPUtil/bfloat16.h"
+#include "src/math/asinbf16.h"
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+#include "utils/MPFRWrapper/MPFRUtils.h"
+
+using LlvmLibcAsinBf16Test = LIBC_NAMESPACE::testing::FPTest<bfloat16>;
+
+namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
+
+// Range: [0, Inf]
+static constexpr uint16_t POS_START = 0x0000U;
+static constexpr uint16_t POS_STOP = 0x7f80U;
+
+// Range: [-Inf, 0]
+static constexpr uint16_t NEG_START = 0x8000U;
+static constexpr uint16_t NEG_STOP = 0xff80U;
+
+TEST_F(LlvmLibcAsinBf16Test, PositiveRange) {
+  for (uint16_t v = POS_START; v <= POS_STOP; ++v) {
+    bfloat16 x = FPBits(v).get_val();
+
+    EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, x,
+                                   LIBC_NAMESPACE::asinbf16(x), 0.5);
+  }
+}
+
+TEST_F(LlvmLibcAsinBf16Test, NegativeRange) {
+  for (uint16_t v = NEG_START; v <= NEG_STOP; ++v) {
+    bfloat16 x = FPBits(v).get_val();
+
+    EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, x,
+                                   LIBC_NAMESPACE::asinbf16(x), 0.5);
+  }
+}
+
+TEST_F(LlvmLibcAsinBf16Test, SpecialNumbers) {
+  constexpr bfloat16 VALUES[] = {zero,    neg_zero,   inf,
+                                 neg_inf, min_normal, max_normal};
+  for (size_t i = 0; i < 6; ++i) {
+    bfloat16 x = VALUES[i];
+
+    EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, x,
+                                   LIBC_NAMESPACE::asinbf16(x), 0.5);
+  }
+}
----------------
hulxv wrote:

```suggestion
```

No need to do it in the mpfr tests. should be in the smoke test

https://github.com/llvm/llvm-project/pull/184170