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49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
#ifndef HALFVEC_H
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#define HALFVEC_H
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#define __STDC_WANT_IEC_60559_TYPES_EXT__
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#include <float.h>
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#include "bitutils.h"
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#include "fmgr.h"
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#include "vector.h"
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#if defined(USE_DISPATCH)
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#define HALFVEC_DISPATCH
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#endif
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/* F16C has better performance than _Float16 (on x86-64) */
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#if defined(__F16C__)
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#define F16C_SUPPORT
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#elif defined(__FLT16_MAX__) && !defined(HALFVEC_DISPATCH)
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#define FLT16_SUPPORT
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#endif
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#ifdef FLT16_SUPPORT
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#define half _Float16
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#define HALF_MAX FLT16_MAX
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#else
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#define half uint16
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#define HALF_MAX 65504
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#endif
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#define HALFVEC_MAX_DIM VECTOR_MAX_DIM
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#define HALFVEC_SIZE(_dim) (offsetof(HalfVector, x) + sizeof(half)*(_dim))
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#define DatumGetHalfVector(x) ((HalfVector *) PG_DETOAST_DATUM(x))
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#define PG_GETARG_HALFVEC_P(x) DatumGetHalfVector(PG_GETARG_DATUM(x))
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#define PG_RETURN_HALFVEC_P(x) PG_RETURN_POINTER(x)
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typedef struct HalfVector
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{
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int32 vl_len_; /* varlena header (do not touch directly!) */
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int16 dim; /* number of dimensions */
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int16 unused; /* reserved for future use, always zero */
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half x[FLEXIBLE_ARRAY_MEMBER];
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} HalfVector;
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HalfVector *InitHalfVector(int dim);
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#endif
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