[libc-commits] [libc] [libc][complex] Implement different flavors of the `conj` function (PR #118671)

[via libc-commits]

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@@ -10,11 +10,70 @@
 #define LLVM_LIBC_SRC___SUPPORT_COMPLEX_TYPE_H
 
 #include "src/__support/macros/config.h"
+#include "src/__support/macros/properties/complex_types.h"
+#include "src/__support/macros/properties/types.h"
 
 namespace LIBC_NAMESPACE_DECL {
 template <typename T> struct Complex {
   T real;
   T imag;
 };
+
+template <typename T> struct make_complex;
+
+template <> struct make_complex<float> {
+  using type = _Complex float;
+};
+template <> struct make_complex<double> {
+  using type = _Complex double;
+};
+template <> struct make_complex<long double> {
+  using type = _Complex long double;
+};
+
+#if defined(LIBC_TYPES_HAS_CFLOAT16)
+template <> struct make_complex<float16> {
+  using type = cfloat16;
+};
+#endif
+#if defined(LIBC_TYPES_HAS_CFLOAT128)
+template <> struct make_complex<float128> {
+  using type = cfloat128;
+};
+#endif
+
+template <typename T> using make_complex_t = typename make_complex<T>::type;
+
+template <typename T> struct make_real;
+
+template <> struct make_real<_Complex float> {
+  using type = float;
+};
+template <> struct make_real<_Complex double> {
+  using type = double;
+};
+template <> struct make_real<_Complex long double> {
+  using type = long double;
+};
+
+#if defined(LIBC_TYPES_HAS_CFLOAT16)
+template <> struct make_real<cfloat16> {
+  using type = float16;
+};
+#endif
+#if defined(LIBC_TYPES_HAS_CFLOAT128)
+template <> struct make_real<cfloat128> {
+  using type = float128;
+};
+#endif
+
+template <typename T> using make_real_t = typename make_real<T>::type;
+
+template <typename T> T conjugate(T c) {
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lntue wrote:

nit: add `LIBC_INLINE constexpr`

https://github.com/llvm/llvm-project/pull/118671