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- #ifndef __NPY_HALFFLOAT_H__
- #define __NPY_HALFFLOAT_H__
- #include <Python.h>
- #include <numpy/npy_math.h>
- #ifdef __cplusplus
- extern "C" {
- #endif
- /*
- * Half-precision routines
- */
- /* Conversions */
- float npy_half_to_float(npy_half h);
- double npy_half_to_double(npy_half h);
- npy_half npy_float_to_half(float f);
- npy_half npy_double_to_half(double d);
- /* Comparisons */
- int npy_half_eq(npy_half h1, npy_half h2);
- int npy_half_ne(npy_half h1, npy_half h2);
- int npy_half_le(npy_half h1, npy_half h2);
- int npy_half_lt(npy_half h1, npy_half h2);
- int npy_half_ge(npy_half h1, npy_half h2);
- int npy_half_gt(npy_half h1, npy_half h2);
- /* faster *_nonan variants for when you know h1 and h2 are not NaN */
- int npy_half_eq_nonan(npy_half h1, npy_half h2);
- int npy_half_lt_nonan(npy_half h1, npy_half h2);
- int npy_half_le_nonan(npy_half h1, npy_half h2);
- /* Miscellaneous functions */
- int npy_half_iszero(npy_half h);
- int npy_half_isnan(npy_half h);
- int npy_half_isinf(npy_half h);
- int npy_half_isfinite(npy_half h);
- int npy_half_signbit(npy_half h);
- npy_half npy_half_copysign(npy_half x, npy_half y);
- npy_half npy_half_spacing(npy_half h);
- npy_half npy_half_nextafter(npy_half x, npy_half y);
- npy_half npy_half_divmod(npy_half x, npy_half y, npy_half *modulus);
- /*
- * Half-precision constants
- */
- #define NPY_HALF_ZERO (0x0000u)
- #define NPY_HALF_PZERO (0x0000u)
- #define NPY_HALF_NZERO (0x8000u)
- #define NPY_HALF_ONE (0x3c00u)
- #define NPY_HALF_NEGONE (0xbc00u)
- #define NPY_HALF_PINF (0x7c00u)
- #define NPY_HALF_NINF (0xfc00u)
- #define NPY_HALF_NAN (0x7e00u)
- #define NPY_MAX_HALF (0x7bffu)
- /*
- * Bit-level conversions
- */
- npy_uint16 npy_floatbits_to_halfbits(npy_uint32 f);
- npy_uint16 npy_doublebits_to_halfbits(npy_uint64 d);
- npy_uint32 npy_halfbits_to_floatbits(npy_uint16 h);
- npy_uint64 npy_halfbits_to_doublebits(npy_uint16 h);
- #ifdef __cplusplus
- }
- #endif
- #endif
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