Vulkan-Docs/appendices/VK_KHR_shader_float16_int8.txt

// Copyright (c) 2014-2019 Khronos Group. This work is licensed under a
// Creative Commons Attribution 4.0 International License; see
// http://creativecommons.org/licenses/by/4.0/

include::meta/VK_KHR_shader_float16_int8.txt[]

*Last Modified Date*::
    2018-03-07
*IP Status*::
    No known IP claims.
*Interactions and External Dependencies*::
  - This extension interacts with `<<VK_KHR_8bit_storage>>`
  - This extension interacts with `<<VK_KHR_16bit_storage>>`
  - This extension interacts with `<<VK_KHR_shader_float_controls>>`
*Contributors*::
    - Alexander Galazin, Arm
    - Jan-Harald Fredriksen, Arm
    - Jeff Bolz, NVIDIA
    - Graeme Leese, Broadcom
    - Daniel Rakos, AMD

=== Description

The `VK_KHR_shader_float16_int8` extension allows use of 16-bit
floating-point types and 8-bit integer types in shaders for arithmetic
operations.

It introduces two new optional features pname:shaderFloat16 and
pname:shaderInt8 which directly map to the code:Float16 and the code:Int8
SPIR-V capabilities.
The `VK_KHR_shader_float16_int8` extension also specifies precision
requirements for half-precision floating-point SPIR-V operations.
This extension doesn't enable use of 8-bit integer types or 16-bit
floating-point types in any <<interfaces-iointerfaces, shader input and
output interfaces>> and therefore doesn't supersede the
`<<VK_KHR_8bit_storage>>` or `<<VK_KHR_16bit_storage>>` extensions.

=== New Enum Constants

  * Extending elink:VkStructureType:
  ** ename:VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FLOAT16_INT8_FEATURES_KHR

=== New Structures

  * slink:VkPhysicalDeviceFloat16Int8FeaturesKHR

=== New Functions

  * None

=== Version History
  * Revision 1, 2018-03-07 (Alexander Galazin)
    - Initial draft