[libc-commits] [libc] [llvm] [libc][math][c++23] Add Fmabf16 math function (PR #182836)

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@@ -0,0 +1,61 @@
+//===-- Exhaustive test for fmabf16 ---------------------------------------===//
+//
+// 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/fmabf16.h"
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+#include "utils/MPFRWrapper/MPFRUtils.h"
+
+using LlvmLibcFmaBf16Test = LIBC_NAMESPACE::testing::FPTest<bfloat16>;
+
+namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
+
+// Normal range: [+0, +int]
+static constexpr uint16_t POS_START = 0x0000U;
+static constexpr uint16_t POS_STOP = 0x7f80U;
+
+// Normal range: [-0, -int]
+static constexpr uint16_t NEG_START = 0x8000U;
+static constexpr uint16_t NEG_STOP = 0xff80U;
+
+TEST_F(LlvmLibcFmaBf16Test, PositiveRange) {
+  constexpr bfloat16 VALUES[] = {zero,    neg_zero,   inf,
+                                 neg_inf, min_normal, max_normal};
+  for (uint16_t v1 = POS_START; v1 <= POS_STOP; v1++) {
+    for (uint16_t v2 = v1; v2 <= POS_STOP; v2++) {
+
+      bfloat16 x = FPBits(v1).get_val();
+      bfloat16 y = FPBits(v2).get_val();
+      for (const bfloat16 &z : VALUES) {
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lntue wrote:

nit, just take value, don't need const ref here.

https://github.com/llvm/llvm-project/pull/182836