[libc][math][c23] Add entrypoints and tests for fsqrt{,l,f128} (#99669)

8 files changed, 160 insertions, 0 deletions

diff --git a/libc/src/math/CMakeLists.txt b/libc/src/math/CMakeLists.txt
index 050bf0f..82dd231 100644
--- a/libc/src/math/CMakeLists.txt
+++ b/libc/src/math/CMakeLists.txt
@@ -131,6 +131,10 @@ add_math_entrypoint_object(f16sqrtf)
 add_math_entrypoint_object(f16sqrtl)
 add_math_entrypoint_object(f16sqrtf128)
 
+add_math_entrypoint_object(fsqrt)
+add_math_entrypoint_object(fsqrtl)
+add_math_entrypoint_object(fsqrtf128)
+
 add_math_entrypoint_object(f16sub)
 add_math_entrypoint_object(f16subf)
 add_math_entrypoint_object(f16subl)
diff --git a/libc/src/math/fsqrt.h b/libc/src/math/fsqrt.h
new file mode 100644
index 0000000..e6a8c31
--- /dev/null
+++ b/libc/src/math/fsqrt.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for fsqrt -------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_MATH_FSQRT_H
+#define LLVM_LIBC_SRC_MATH_FSQRT_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+float fsqrt(double x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_MATH_FSQRT_H
diff --git a/libc/src/math/fsqrtf128.h b/libc/src/math/fsqrtf128.h
new file mode 100644
index 0000000..5286cbc
--- /dev/null
+++ b/libc/src/math/fsqrtf128.h
@@ -0,0 +1,21 @@
+//===-- Implementation header for fsqrtf128 ---------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_MATH_FSQRTF128_H
+#define LLVM_LIBC_SRC_MATH_FSQRTF128_H
+
+#include "src/__support/macros/config.h"
+#include "src/__support/macros/properties/types.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+float fsqrtf128(float128 x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_MATH_FSQRTF128_H
diff --git a/libc/src/math/fsqrtl.h b/libc/src/math/fsqrtl.h
new file mode 100644
index 0000000..a50eea3
--- /dev/null
+++ b/libc/src/math/fsqrtl.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for fsqrtl ------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_MATH_FSQRTL_H
+#define LLVM_LIBC_SRC_MATH_FSQRTL_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+float fsqrtl(long double x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_MATH_FSQRTL_H
diff --git a/libc/src/math/generic/CMakeLists.txt b/libc/src/math/generic/CMakeLists.txt
index 8e8ffb0..7712a6d 100644
--- a/libc/src/math/generic/CMakeLists.txt
+++ b/libc/src/math/generic/CMakeLists.txt
@@ -4202,6 +4202,43 @@ add_entrypoint_object(
 )
 
 add_entrypoint_object(
+  fsqrt
+  SRCS
+    fsqrt.cpp
+  HDRS
+    ../fsqrt.h
+  DEPENDS
+    libc.src.__support.FPUtil.generic.sqrt
+  COMPILE_OPTIONS
+    -O3
+)
+
+add_entrypoint_object(
+  fsqrtl
+  SRCS
+    fsqrtl.cpp
+  HDRS
+    ../fsqrtl.h
+  DEPENDS
+    libc.src.__support.FPUtil.generic.sqrt
+  COMPILE_OPTIONS
+    -O3
+)
+
+add_entrypoint_object(
+  fsqrtf128
+  SRCS
+    fsqrtf128.cpp
+  HDRS
+    ../fsqrtf128.h
+  DEPENDS
+    libc.src.__support.macros.properties.types
+    libc.src.__support.FPUtil.generic.sqrt
+  COMPILE_OPTIONS
+    -O3
+)
+
+add_entrypoint_object(
   cbrtf
   SRCS
     cbrtf.cpp
diff --git a/libc/src/math/generic/fsqrt.cpp b/libc/src/math/generic/fsqrt.cpp
new file mode 100644
index 0000000..d54471f
--- /dev/null
+++ b/libc/src/math/generic/fsqrt.cpp
@@ -0,0 +1,18 @@
+//===-- Implementation of fsqrt function ----------------------------------===//
+//
+// 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/math/fsqrt.h"
+#include "src/__support/FPUtil/generic/sqrt.h"
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(float, fsqrt, (double x)) { return fputil::sqrt<float>(x); }
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/generic/fsqrtf128.cpp b/libc/src/math/generic/fsqrtf128.cpp
new file mode 100644
index 0000000..f2c0495
--- /dev/null
+++ b/libc/src/math/generic/fsqrtf128.cpp
@@ -0,0 +1,20 @@
+//===-- Implementation of fsqrt128 function -------------------------------===//
+//
+// 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/math/fsqrtf128.h"
+#include "src/__support/FPUtil/generic/sqrt.h"
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(float, fsqrtf128, (float128 x)) {
+  return fputil::sqrt<float>(x);
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/math/generic/fsqrtl.cpp b/libc/src/math/generic/fsqrtl.cpp
new file mode 100644
index 0000000..b896a84
--- /dev/null
+++ b/libc/src/math/generic/fsqrtl.cpp
@@ -0,0 +1,20 @@
+//===-- Implementation of fsqrtl function ---------------------------------===//
+//
+// 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/math/fsqrtl.h"
+#include "src/__support/FPUtil/generic/sqrt.h"
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(float, fsqrtl, (long double x)) {
+  return fputil::sqrt<float>(x);
+}
+
+} // namespace LIBC_NAMESPACE_DECL