vstorea_halfn

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

void vstorea_halfn ( floatn data,
  size_t offset,
  __global half *p)
void vstorea_halfn_rte ( floatn data,
  size_t offset,
  __global half *p)
void vstorea_halfn_rtz ( floatn data,
  size_t offset,
  __global half *p)
void vstorea_halfn_rtp ( floatn data,
  size_t offset,
  __global half *p)
void vstorea_halfn_rtn ( floatn data,
  size_t offset,
  __global half *p)

void vstorea_halfn ( floatn data,
  size_t offset,
  __local half *p)
void vstorea_halfn_rte ( floatn data,
  size_t offset,
  __local half *p)
void vstorea_halfn_rtz ( floatn data,
  size_t offset,
  __local half *p)
void vstorea_halfn_rtp ( floatn data,
  size_t offset,
  __local half *p)
void vstorea_halfn_rtn ( floatn data,
  size_t offset,
  __local half *p)

void vstorea_halfn ( floatn data,
  size_t offset,
  __private half *p)
void vstorea_halfn_rte ( floatn data,
  size_t offset,
  __private half *p)
void vstorea_halfn_rtz ( floatn data,
  size_t offset,
  __private half *p)
void vstorea_halfn_rtp ( floatn data,
  size_t offset,
  __private half *p)
void vstorea_halfn_rtn ( floatn data,
  size_t offset,
  __private half *p)

If the double extension is enabled, you may use doublen instead of floatn.

Description

The floatn value igiven by data is converted to a halfn value using the appropriate rounding mode.

For n = 1, 2, 4, 8 and 16, the halfn value is written to the address computed as (p + (offset * n)). The address computed as (p + (offset * n)) must be aligned to sizeof (halfn) bytes.

For n = 3, the half3 value is written to the address computed as (p + (offset * 4)). The address computed as (p + (offset * 4)) must be aligned to sizeof (half) * 4 bytes.

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

Notes

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

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.

This function may be extended with the cl_khr_fp64 extension to include versions that read from or write to double scalar or vector values.

The generic type gentype is extended to include double. The generic type gentypen is extended to include double2, double3, double4, double8, and double16.

The vstore_half, vstore_halfn, and vstorea_halfn functions are extended to allow a double precision scalar or vector value to be written to memory as half values.

vload3 and vload_half3 read x, y, z components from address (p + (offset * 3)) into a 3-component vector. vstore3, and vstore_half3 write x, y, z components from a 3-component vector to address (p + (offset * 3)).

In addition vloada_half3 reads x, y, z components from address (p + (offset * 4)) into a 3- component vector and vstorea_half3 writes x, y, z components from a 3-component vector to address (p + (offset * 4)).

Specification

OpenCL Specification

Also see

Vector Data Load and Store Functions

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