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[libc] Implement CMPLX for clang < 12 #157096

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Merged
merged 4 commits into from
Sep 5, 2025
Merged

[libc] Implement CMPLX for clang < 12 #157096

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ffb7b6c
buildin complex only available for clang >= 12
c8ef Sep 5, 2025
d553af7
address review comments
c8ef Sep 5, 2025
34d61e7
Merge branch 'main' into clang11
c8ef Sep 5, 2025
34f9c05
address review comments
c8ef Sep 5, 2025
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19 changes: 12 additions & 7 deletions libc/include/llvm-libc-macros/complex-macros.h
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Expand Up @@ -22,21 +22,26 @@

// TODO: Add imaginary macros once GCC or Clang support _Imaginary builtin-type.

#define CMPLX(x, y) __builtin_complex((double)(x), (double)(y))
#define CMPLXF(x, y) __builtin_complex((float)(x), (float)(y))
#define CMPLXL(x, y) __builtin_complex((long double)(x), (long double)(y))
#if __has_builtin(__builtin_complex)
#define __CMPLX(r, i, t) (__builtin_complex((t)(r), (t)(i)))
#else
#define __CMPLX(r, i, t) ((_Complex t){(t)(r), (t)(i)})
#endif

#define CMPLX(r, i) __CMPLX(r, i, double)
#define CMPLXF(r, i) __CMPLX(r, i, float)
#define CMPLXL(r, i) __CMPLX(r, i, long double)

#ifdef LIBC_TYPES_HAS_CFLOAT16
#if !defined(__clang__) || (__clang_major__ >= 22 && __clang_minor__ > 0)
#define CMPLXF16(x, y) __builtin_complex((_Float16)(x), (_Float16)(y))
#define CMPLXF16(r, i) __CMPLX(r, i, _Float16)
#else
#define CMPLXF16(x, y) \
((complex _Float16)(__builtin_complex((float)(x), (float)(y))))
#define CMPLXF16(r, i) ((complex _Float16)(__CMPLX(r, i, float)))
#endif
#endif // LIBC_TYPES_HAS_CFLOAT16

#ifdef LIBC_TYPES_HAS_CFLOAT128
#define CMPLXF128(x, y) __builtin_complex((float128)(x), (float128)(y))
#define CMPLXF128(r, i) __CMPLX(r, i, float128)
#endif // LIBC_TYPES_HAS_CFLOAT128

#endif // __STDC_NO_COMPLEX__
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