1 files changed, 44 insertions, 0 deletions
diff --git a/libc/test/src/math/exhaustive/cosf_float_test.cpp b/libc/test/src/math/exhaustive/cosf_float_test.cpp
new file mode 100644
index 000000000000..0c3a98832c84
--- /dev/null
+++ b/libc/test/src/math/exhaustive/cosf_float_test.cpp
@@ -0,0 +1,44 @@
+//===-- Exhaustive test for cosf - float-only -----------------------------===//
+//
+// 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 "exhaustive_test.h"
+#include "src/__support/math/sincosf_float_eval.h"
+#include "utils/MPFRWrapper/MPFRUtils.h"
+
+namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
+
+float cosf_fast(float x) {
+  return LIBC_NAMESPACE::math::sincosf_float_eval::sincosf_eval<
+      /*IS_SIN*/ false>(x);
+}
+
+using LlvmLibcCosfExhaustiveTest =
+    LlvmLibcUnaryOpExhaustiveMathTest<float, mpfr::Operation::Cos, cosf_fast,
+                                      3>;
+
+// Range: [0, Inf];
+static constexpr uint32_t POS_START = 0x0000'0000U;
+static constexpr uint32_t POS_STOP = 0x7f80'0000U;
+
+TEST_F(LlvmLibcCosfExhaustiveTest, PostiveRange) {
+  std::cout << "-- Testing for FE_TONEAREST in range [0x" << std::hex
+            << POS_START << ", 0x" << POS_STOP << ") --" << std::dec
+            << std::endl;
+  test_full_range(mpfr::RoundingMode::Nearest, POS_START, POS_STOP);
+}
+
+// Range: [-Inf, 0];
+static constexpr uint32_t NEG_START = 0x8000'0000U;
+static constexpr uint32_t NEG_STOP = 0xff80'0000U;
+
+TEST_F(LlvmLibcCosfExhaustiveTest, NegativeRange) {
+  std::cout << "-- Testing for FE_TONEAREST in range [0x" << std::hex
+            << NEG_START << ", 0x" << NEG_STOP << ") --" << std::dec
+            << std::endl;
+  test_full_range(mpfr::RoundingMode::Nearest, NEG_START, NEG_STOP);
+}