Read a half float vector from a pointer to memory.

float n vload_half n(size_t offset,
                     const half *p)

float n vload_half n(size_t offset,
                     const constant half *p)

Description

Read sizeof(halfn) bytes of data from address (p + (offset * n)). The data read is interpreted as a halfn value.

The halfn value read is converted to a floatn value and the floatn value is returned. The read address computed as (p + (offset * n)) must be 16-bit aligned.

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. vload`n`, vstore`n` 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.

We use the type name halfn to represent n-element vectors of half elements.

When extended by the cl_khr_fp16 extension, the generic type gentypen is extended to include half, half2, half3, half4, half8, and half16.

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

Also see

Specification