[libc-commits] [libc] [libc][stdfix] Implement fxdivi functions (rdivi) (PR #154914)

[via libc-commits]

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@@ -0,0 +1,49 @@
+//===-- Utility class to test fxdivi functions ------------------*- C++ -*-===//
+//
+// 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 "test/UnitTest/Test.h"
+
+#include "src/__support/fixed_point/fx_rep.h"
+#include "src/__support/macros/sanitizer.h"
+
+#include "hdr/signal_macros.h"
+
+template <typename XType>
+class DivITest : public LIBC_NAMESPACE::testing::Test {
+  using FXRep = LIBC_NAMESPACE::fixed_point::FXRep<int>;
+
+public:
+  typedef XType (*DivIFunc)(int, int);
+
+  void testBasic(DivIFunc func) {
+    auto c1 = func(2, 3);
+    auto e1 = 0.666666;
+    EXPECT_EQ(static_cast<XType>(c1), static_cast<XType>(e1));
+
+    c1 = func(3, 4);
+    e1 = 0.75;
+    EXPECT_EQ(static_cast<XType>(c1), static_cast<XType>(e1));
+
+    c1 = func(1043, 2764);
+    e1 = 0.37735;
+    EXPECT_EQ(static_cast<XType>(c1), static_cast<XType>(e1));
+
+    c1 = func(60000, 720293);
+    e1 = 0.083299;
+    EXPECT_EQ(static_cast<XType>(c1), static_cast<XType>(e1));
+
+    c1 = func(7, 3);
+    e1 = 2.33333;
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PiJoules wrote:

For fract types this shouldn't be an expected result type since fract types can't be grater than 1. This might be useful once we get the accum divi functions, but it's not needed now.

https://github.com/llvm/llvm-project/pull/154914