vstorea_halfn

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

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

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

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

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

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

`void vstorea_halfn (`	double`n` `data`,
	size_t `offset`,
	half `*p)`

`void vstorea_halfn_rte (`	double`n` `data`,
	size_t `offset`,
	half `*p)`

`void vstorea_halfn_rtz (`	double`n` `data`,
	size_t `offset`,
	half `*p)`

`void vstorea_halfn_rtp (`	double`n` `data`,
	size_t `offset`,
	half `*p)`

`void vstorea_halfn_rtn (`	double`n` `data`,
	size_t `offset`,
	half `*p)`

Description

The floatn (or doublen) value given 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 default rounding mode. The default rounding mode is round to the nearest even.

An application that wants to use half and halfn types will need to include the #pragma OPENCL EXTENSION cl_khr_fp16 : enable directive.

Notes

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

The suffix n in the function names (i.e. vloadn, vstoren etc.) represent n-element vectors, 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.

NOTE: The vector data load and store functions variants that take pointer arguments which point to the generic address space are also supported.

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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