vstore_halfn

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

`void vstore_halfn (`	float`n` `data`,
	size_t `offset`,
	__global half `*p)`

`void vstore_halfn_rte (`	float`n` `data`,
	size_t `offset`,
	__global half `*p)`

`void vstore_halfn_rtz (`	float`n` `data`,
	size_t `offset`,
	__global half `*p)`

`void vstore_halfn_rtp (`	float`n` `data`,
	size_t `offset`,
	__global half `*p)`

`void vstore_halfn_rtn (`	float`n` `data`,
	size_t `offset`,
	__global half `*p)`

`void vstore_halfn (`	float`n` `data`,
	size_t `offset`,
	__local half `*p)`

`void vstore_halfn_rte (`	float`n` `data`,
	size_t `offset`,
	__local half `*p)`

`void vstore_halfn_rtz (`	float`n` `data`,
	size_t `offset`,
	__local half `*p)`

`void vstore_halfn_rtp (`	float`n` `data`,
	size_t `offset`,
	__local half `*p)`

`void vstore_halfn_rtn (`	float`n` `data`,
	size_t `offset`,
	__local half `*p)`

`void vstore_halfn (`	float`n` `data`,
	size_t `offset`,
	__private half `*p)`

`void vstore_halfn_rte (`	float`n` `data`,
	size_t `offset`,
	__private half `*p)`

`void vstore_halfn_rtz (`	float`n` `data`,
	size_t `offset`,
	__private half `*p)`

`void vstore_halfn_rtp (`	float`n` `data`,
	size_t `offset`,
	__private half `*p)`

`void vstore_halfn_rtn (`	float`n` `data`,
	size_t `offset`,
	__private half `*p)`

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

Description

The floatn value given by data is converted to a halfn value using the appropriate rounding mode. The halfn value is then written to address computed as (p + (offset * n)). The address computed as (p + (offset * n)) must be 16-bit aligned.

vstore_halfn 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 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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