vstore_half

Convert float to half and write to a pointer to memory.

void vstore_half ( float data,
  size_t offset,
  __global half *p)
void vstore_half_rte ( float data,
  size_t offset,
  __global half *p)
void vstore_half_rtz ( float data,
  size_t offset,
  __global half *p)
void vstore_half_rtp ( float data,
  size_t offset,
  __global half *p)
void vstore_half_rtn ( float data,
  size_t offset,
  __global half *p)

void vstore_half ( float data,
  size_t offset,
  __local half *p)
void vstore_half_rte ( float data,
  size_t offset,
  __local half *p)
void vstore_half_rtz ( float data,
  size_t offset,
  __local half *p)
void vstore_half_rtp ( float data,
  size_t offset,
  __local half *p)
void vstore_half_rtn ( float data,
  size_t offset,
  __local half *p)

void vstore_half ( float data,
  size_t offset,
  __private half *p)
void vstore_half_rte ( float data,
  size_t offset,
  __private half *p)
void vstore_half_rtz ( float data,
  size_t offset,
  __private half *p)
void vstore_half_rtp ( float data,
  size_t offset,
  __private half *p)
void vstore_half_rtn ( float data,
  size_t offset,
  __private half *p)

If the optional double is supported, you may use double instead of float.

Description

The float (or double if optional double is supported) value given by data is first converted to a half value using the appropriate rounding mode. The half value is then written to address computed as (p + offset). The address computed as (p + offset) must be 16-bit aligned.

vstore_half uses the current rounding mode. The default current rounding mode is round to nearest even.

Notes

Vector Data Load and Store Functions allow you to read and write vector types from a pointer to memory.

The generic type gentype is used to indicate the built-in data types char, uchar, short, ushort, int, uint, long, ulong, float, or double.

The generic type name gentypen represents n-element vectors of gentype elements. The suffix n is also used in the function names (i.e. vloadn, vstoren, etc.), where n = 2, 3, 4, 8, or 16.

The results of vector data load and store functions are undefined if the address being read from or written to is not correctly aligned. The pointer argument p can be a pointer to __global, __local, or __private memory for store functions. The pointer argument p can be a pointer to __global, __local, __constant or __private memory for load functions.

Specification

OpenCL Specification

Also see

Vector Data Load and Store Functions

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