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