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 optional double is supported, you may use doublen instead of floatn.

Description

The floatn (or doublen if optional double is supported) 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 default rounding mode. The default 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.

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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