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Move CMPLX() into <openlibm_complex.h>, as it is normally part of <complex.h>.

Browse source 
While there, make CMPLX() work with Clang by using compound literals.
Now that cimag*() uses __imag__, we can also just inline the unions.
There is no need for the separate types anymore.

Also just define CMPLX() unconditionally now, as we no longer pull in
the host's <complex.h>.
This commit is contained in:
Ed Schouten 2015-01-09 13:57:45 +01:00
parent a249c5ebb3
commit 410e6ebb59
2 changed files with 68 additions and 98 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

98
src/openlibm.h
View file

@ -17,8 +17,6 @@
#ifndef OPENLIBM_H
#define OPENLIBM_H
#include <openlibm_complex.h>
#if (defined(_WIN32) || defined (_MSC_VER)) && !defined(__WIN32__)
#define __WIN32__
#endif
@ -180,102 +178,6 @@ extern int signgam;
#endif
#endif /* __BSD_VISIBLE */
//VBS
//#ifdef _COMPLEX_H
/*
* C99 specifies that complex numbers have the same representation as
* an array of two elements, where the first element is the real part
* and the second element is the imaginary part.
*/
typedef union {
float complex f;
float a[2];
} float_complex;
typedef union {
double complex f;
double a[2];
} double_complex;
typedef union {
long double complex f;
long double a[2];
} long_double_complex;
#define REALPART(z) ((z).a[0])
#define IMAGPART(z) ((z).a[1])
/*
* Macros that can be used to construct complex values.
*
* The C99 standard intends x+I*y to be used for this, but x+I*y is
* currently unusable in general since gcc introduces many overflow,
* underflow, sign and efficiency bugs by rewriting I*y as
* (0.0+I)*(y+0.0*I) and laboriously computing the full complex product.
* In particular, I*Inf is corrupted to NaN+I*Inf, and I*-0 is corrupted
* to -0.0+I*0.0.
*
* In C11, a CMPLX(x,y) macro was added to circumvent this limitation,
* and gcc 4.7 added a __builtin_complex feature to simplify implementation
* of CMPLX in libc, so we can take advantage of these features if they
* are available.
*
* If __builtin_complex is not available, resort to using inline
* functions instead. These can unfortunately not be used to construct
* compile-time constants.
*/
#define HAVE_BUILTIN_COMPLEX (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)) && !defined(__INTEL_COMPILER)
#ifndef CMPLXF
#if HAVE_BUILTIN_COMPLEX
# define CMPLXF(x,y) __builtin_complex ((float) (x), (float) (y))
#else
static __inline float complex
CMPLXF(float x, float y)
{
float_complex z;
REALPART(z) = x;
IMAGPART(z) = y;
return (z.f);
}
#endif
#endif
#ifndef CMPLX
#if HAVE_BUILTIN_COMPLEX
# define CMPLX(x,y) __builtin_complex ((double) (x), (double) (y))
#else
static __inline double complex
CMPLX(double x, double y)
{
double_complex z;
REALPART(z) = x;
IMAGPART(z) = y;
return (z.f);
}
#endif
#endif
#ifndef CMPLXL
#if HAVE_BUILTIN_COMPLEX
# define CMPLXL(x,y) __builtin_complex ((long double) (x), (long double) (y))
#else
static __inline long double complex
CMPLXL(long double x, long double y)
{
long_double_complex z;
REALPART(z) = x;
IMAGPART(z) = y;
return (z.f);
}
#endif
#endif
//VBS
//#endif /* _COMPLEX_H */
/*
* Most of these functions depend on the rounding mode and have the side
* effect of raising floating-point exceptions, so they are not declared

68
src/openlibm_complex.h
View file

@ -23,6 +23,74 @@
#define _Complex_I 1.0fi
#define I _Complex_I
/*
* Macros that can be used to construct complex values.
*
* The C99 standard intends x+I*y to be used for this, but x+I*y is
* currently unusable in general since gcc introduces many overflow,
* underflow, sign and efficiency bugs by rewriting I*y as
* (0.0+I)*(y+0.0*I) and laboriously computing the full complex product.
* In particular, I*Inf is corrupted to NaN+I*Inf, and I*-0 is corrupted
* to -0.0+I*0.0.
*
* In C11, a CMPLX(x,y) macro was added to circumvent this limitation,
* and gcc 4.7 added a __builtin_complex feature to simplify implementation
* of CMPLX in libc, so we can take advantage of these features if they
* are available. Clang simply allows complex values to be constructed
* using a compound literal.
*
* If __builtin_complex is not available, resort to using inline
* functions instead. These can unfortunately not be used to construct
* compile-time constants.
*
* C99 specifies that complex numbers have the same representation as
* an array of two elements, where the first element is the real part
* and the second element is the imaginary part.
*/
#ifdef __clang__
# define CMPLXF(x, y) ((float complex){x, y})
# define CMPLX(x, y) ((double complex){x, y})
# define CMPLXL(x, y) ((long double complex){x, y})
#elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)) && !defined(__INTEL_COMPILER)
# define CMPLXF(x,y) __builtin_complex ((float) (x), (float) (y))
# define CMPLX(x,y) __builtin_complex ((double) (x), (double) (y))
# define CMPLXL(x,y) __builtin_complex ((long double) (x), (long double) (y))
#else
static inline float complex
CMPLXF(float x, float y)
{
union {
float a[2];
float complex f;
} z = {{ x, y }};
return (z.f);
}
static inline double complex
CMPLX(double x, double y)
{
union {
double a[2];
double complex f;
} z = {{ x, y }};
return (z.f);
}
static inline long double complex
CMPLXL(long double x, long double y)
{
union {
long double a[2];
long double complex f;
} z = {{ x, y }};
return (z.f);
}
#endif
/*
* Double versions of C99 functions
*/