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Add C11 macros CMPLX(), CMPLXF() and CMPLXL().

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Clang allows us to initialize complex numbers using an array
initializer, casted to a complex type. GCC has a builtin called
__builtin_complex().
This commit is contained in:
Ed Schouten 2013-05-25 18:55:55 +00:00
parent 5f4cd89cce
commit e814330de1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=250990
1 changed files with 12 additions and 0 deletions
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12
include/complex.h
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@ -46,6 +46,18 @@ _Static_assert(__generic(_Complex_I, float _Complex, 1, 0),
#define complex _Complex
#define I _Complex_I
#if __ISO_C_VISIBLE >= 2011
#ifdef __clang__
#define CMPLX(x, y) ((double complex){ x, y })
#define CMPLXF(x, y) ((float complex){ x, y })
#define CMPLXL(x, y) ((long double complex){ x, y })
#elif __GNUC_PREREQ__(4, 7)
#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))
#endif
#endif /* __ISO_C_VISIBLE >= 2011 */
__BEGIN_DECLS
double cabs(double complex);