[libc][complex] implement different flavors of creal and cimag functions

libc/config/linux/aarch64/entrypoints.txt

@@ -356,6 +356,14 @@ if(LLVM_LIBC_INCLUDE_SCUDO)
 endif()
 
 set(TARGET_LIBM_ENTRYPOINTS
+    # complex.h entrypoints
+    libc.src.complex.creal
+    libc.src.complex.crealf
+    libc.src.complex.creall
+    libc.src.complex.cimag
+    libc.src.complex.cimagf
+    libc.src.complex.cimagl
+
     # fenv.h entrypoints
     libc.src.fenv.feclearexcept
     libc.src.fenv.fedisableexcept
@@ -603,6 +611,10 @@ set(TARGET_LIBM_ENTRYPOINTS
 
 if(LIBC_TYPES_HAS_FLOAT16)
   list(APPEND TARGET_LIBM_ENTRYPOINTS
+    # complex.h C23 _Complex _Float16 entrypoints
+    libc.src.complex.crealf16
+    libc.src.complex.cimagf16
+
     # math.h C23 _Float16 entrypoints
     libc.src.math.canonicalizef16
     libc.src.math.ceilf16
@@ -703,6 +715,10 @@ endif()
 
 if(LIBC_TYPES_HAS_FLOAT128)
   list(APPEND TARGET_LIBM_ENTRYPOINTS
+    # complex.h C23 _Complex _Float128 entrypoints
+    libc.src.complex.crealf128
+    libc.src.complex.cimagf128
+
     # math.h C23 _Float128 entrypoints
     libc.src.math.canonicalizef128
     libc.src.math.ceilf128

libc/config/linux/arm/entrypoints.txt

@@ -197,6 +197,14 @@ if(LLVM_LIBC_INCLUDE_SCUDO)
 endif()
 
 set(TARGET_LIBM_ENTRYPOINTS
+    # complex.h entrypoints
+    libc.src.complex.creal
+    libc.src.complex.crealf
+    libc.src.complex.creall
+    libc.src.complex.cimag
+    libc.src.complex.cimagf
+    libc.src.complex.cimagl
+
     # fenv.h entrypoints
     libc.src.fenv.feclearexcept
     libc.src.fenv.fedisableexcept

libc/config/linux/riscv/entrypoints.txt

@@ -355,6 +355,14 @@ if(LLVM_LIBC_INCLUDE_SCUDO)
 endif()
 
 set(TARGET_LIBM_ENTRYPOINTS
+    # complex.h entrypoints
+    libc.src.complex.creal
+    libc.src.complex.crealf
+    libc.src.complex.creall
+    libc.src.complex.cimag
+    libc.src.complex.cimagf
+    libc.src.complex.cimagl
+
     # fenv.h entrypoints
     libc.src.fenv.feclearexcept
     libc.src.fenv.fedisableexcept
@@ -606,6 +614,10 @@ set(TARGET_LIBM_ENTRYPOINTS
 
 if(LIBC_TYPES_HAS_FLOAT128)
   list(APPEND TARGET_LIBM_ENTRYPOINTS
+    # complex.h C23 _Complex _Float128 entrypoints
+    libc.src.complex.crealf128
+    libc.src.complex.cimagf128
+
     # math.h C23 _Float128 entrypoints
     libc.src.math.canonicalizef128
     libc.src.math.ceilf128

libc/config/linux/x86_64/entrypoints.txt

@@ -355,6 +355,14 @@ if(LLVM_LIBC_INCLUDE_SCUDO)
 endif()
 
 set(TARGET_LIBM_ENTRYPOINTS
+    # complex.h entrypoints
+    libc.src.complex.creal
+    libc.src.complex.crealf
+    libc.src.complex.creall
+    libc.src.complex.cimag
+    libc.src.complex.cimagf
+    libc.src.complex.cimagl
+
     # fenv.h entrypoints
     libc.src.fenv.feclearexcept
     libc.src.fenv.fedisableexcept
@@ -606,6 +614,10 @@ set(TARGET_LIBM_ENTRYPOINTS
 
 if(LIBC_TYPES_HAS_FLOAT16)
   list(APPEND TARGET_LIBM_ENTRYPOINTS
+    # complex.h C23 _Complex _Float16 entrypoints
+    libc.src.complex.crealf16
+    libc.src.complex.cimagf16
+
     # math.h C23 _Float16 entrypoints
     libc.src.math.canonicalizef16
     libc.src.math.ceilf16
@@ -708,6 +720,10 @@ endif()
 
 if(LIBC_TYPES_HAS_FLOAT128)
   list(APPEND TARGET_LIBM_ENTRYPOINTS
+    # complex.h C23 _Complex _Float128 entrypoints
+    libc.src.complex.crealf128
+    libc.src.complex.cimagf128
+
     # math.h C23 _Float128 entrypoints
     libc.src.math.canonicalizef128
     libc.src.math.ceilf128

libc/docs/complex.rst

@@ -55,11 +55,11 @@ Functions
 +-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
 | carg      |                  |                 |                        |                      |                        | 7.3.9.1                | N/A                        |
 +-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
-| cimag     |                  |                 |                        |                      |                        | 7.3.9.2                | N/A                        |
+| cimag     | |check|          | |check|         | |check|                | |check|              | |check|                | 7.3.9.2                | N/A                        |
 +-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
 | conj      |                  |                 |                        |                      |                        | 7.3.9.4                | N/A                        |
 +-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
 | cproj     |                  |                 |                        |                      |                        | 7.3.9.5                | N/A                        |
 +-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+
-| creal     |                  |                 |                        |                      |                        | 7.3.9.6                | N/A                        |
+| creal     | |check|          | |check|         | |check|                | |check|              | |check|                | 7.3.9.6                | N/A                        |
 +-----------+------------------+-----------------+------------------------+----------------------+------------------------+------------------------+----------------------------+

libc/src/CMakeLists.txt

@@ -1,5 +1,6 @@
 add_subdirectory(__support)
 
+add_subdirectory(complex)
 add_subdirectory(ctype)
 add_subdirectory(dlfcn)
 add_subdirectory(errno)

libc/src/__support/CMakeLists.txt

@@ -209,6 +209,12 @@ add_header_library(
     libc.src.__support.CPP.limits
 )
 
+add_header_library(
+  complex_type
+  HDRS
+    complex_type.h
+)
+
 add_header_library(
   integer_operations
   HDRS

libc/src/__support/complex_type.h

@@ -0,0 +1,20 @@
+//===-- complex type --------------------------------------------*- 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___SUPPORT_COMPLEX_TYPE_H
+#define LLVM_LIBC_SRC___SUPPORT_COMPLEX_TYPE_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+template <typename T> struct Complex {
+  T real;
+  T imag;
+};
+} // namespace LIBC_NAMESPACE_DECL
+#endif // LLVM_LIBC_SRC___SUPPORT_COMPLEX_TYPE_H

libc/src/complex/CMakeLists.txt

@@ -0,0 +1,26 @@
+add_subdirectory(generic)
+
+function(add_complex_entrypoint_object name)
+  get_fq_target_name("generic.${name}" fq_generic_target_name)
+  if(TARGET ${fq_generic_target_name})
+    add_entrypoint_object(
+      ${name}
+      ALIAS
+      DEPENDS
+        .generic.${name}
+    )
+    return()
+  endif()
+endfunction()
+
+add_complex_entrypoint_object(creal)
+add_complex_entrypoint_object(crealf)
+add_complex_entrypoint_object(creall)
+add_complex_entrypoint_object(crealf16)
+add_complex_entrypoint_object(crealf128)
+
+add_complex_entrypoint_object(cimag)
+add_complex_entrypoint_object(cimagf)
+add_complex_entrypoint_object(cimagl)
+add_complex_entrypoint_object(cimagf16)
+add_complex_entrypoint_object(cimagf128)

libc/src/complex/cimag.h

@@ -0,0 +1,20 @@
+//===-- Implementation header for cimag -------------------------*- 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_COMPLEX_CIMAG_H
+#define LLVM_LIBC_SRC_COMPLEX_CIMAG_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+double cimag(_Complex double x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_COMPLEX_CIMAG_H

libc/src/complex/cimagf.h

@@ -0,0 +1,20 @@
+//===-- Implementation header for cimagf ------------------------*- 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_COMPLEX_CIMAGF_H
+#define LLVM_LIBC_SRC_COMPLEX_CIMAGF_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+float cimagf(_Complex float x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_COMPLEX_CIMAGF_H

libc/src/complex/cimagf128.h

@@ -0,0 +1,27 @@
+//===-- Implementation header for cimagf128 ---------------------*- 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 "src/__support/macros/properties/complex_types.h"
+#include "src/__support/macros/properties/types.h"
+
+#if defined(LIBC_TYPES_HAS_CFLOAT128)
+
+#ifndef LLVM_LIBC_SRC_COMPLEX_CIMAGF128_H
+#define LLVM_LIBC_SRC_COMPLEX_CIMAGF128_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+float128 cimagf128(cfloat128 x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_COMPLEX_CIMAGF128_H
+
+#endif // LIBC_TYPES_HAS_CFLOAT128

libc/src/complex/cimagf16.h

@@ -0,0 +1,27 @@
+//===-- Implementation header for cimagf16 ----------------------*- 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 "src/__support/macros/properties/complex_types.h"
+#include "src/__support/macros/properties/types.h"
+
+#if defined(LIBC_TYPES_HAS_CFLOAT16)
+
+#ifndef LLVM_LIBC_SRC_COMPLEX_CIMAGF16_H
+#define LLVM_LIBC_SRC_COMPLEX_CIMAGF16_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+float16 cimagf16(cfloat16 x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_COMPLEX_CIMAGF16_H
+
+#endif // LIBC_TYPES_HAS_CFLOAT16

libc/src/complex/cimagl.h

@@ -0,0 +1,20 @@
+//===-- Implementation header for cimagl ------------------------*- 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_COMPLEX_CIMAGL_H
+#define LLVM_LIBC_SRC_COMPLEX_CIMAGL_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+long double cimagl(_Complex long double x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_COMPLEX_CIMAGL_H

libc/src/complex/creal.h

@@ -0,0 +1,20 @@
+//===-- Implementation header for creal -------------------------*- 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_COMPLEX_CREAL_H
+#define LLVM_LIBC_SRC_COMPLEX_CREAL_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+double creal(_Complex double x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_COMPLEX_CREAL_H

libc/src/complex/crealf.h

@@ -0,0 +1,20 @@
+//===-- Implementation header for crealf ------------------------*- 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_COMPLEX_CREALF_H
+#define LLVM_LIBC_SRC_COMPLEX_CREALF_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+float crealf(_Complex float x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_COMPLEX_CREALF_H

libc/src/complex/crealf128.h

@@ -0,0 +1,27 @@
+//===-- Implementation header for crealf128 ---------------------*- 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 "src/__support/macros/properties/complex_types.h"
+#include "src/__support/macros/properties/types.h"
+
+#if defined(LIBC_TYPES_HAS_CFLOAT128)
+
+#ifndef LLVM_LIBC_SRC_COMPLEX_CREALF128_H
+#define LLVM_LIBC_SRC_COMPLEX_CREALF128_H
+
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+float128 crealf128(cfloat128 x);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_COMPLEX_CREALF128_H
+
+#endif // LIBC_TYPES_HAS_CFLOAT128