// 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_atomic_int64.txt[]

*Last Modified Date*::
    2018-07-05
*Interactions and External Dependencies*::
  - This extension requires the
    https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_gpu_shader_int64.txt[`GL_ARB_gpu_shader_int64`]
    and
    https://github.com/KhronosGroup/GLSL/tree/master/extensions/ext/GL_EXT_shader_atomic_int64.txt[`GL_EXT_shader_atomic_int64`]
    extensions for GLSL source languages.
*Contributors*::
  - Aaron Hagan, AMD
  - Daniel Rakos, AMD
  - Jeff Bolz, NVIDIA
  - Neil Henning, Codeplay

This extension advertises the SPIR-V *Int64Atomics* capability for Vulkan,
which allows a shader to contain 64-bit atomic operations on signed and
unsigned integers.
The supported operations include OpAtomicMin, OpAtomicMax, OpAtomicAnd,
OpAtomicOr, OpAtomicXor, OpAtomicAdd, OpAtomicExchange, and
OpAtomicCompareExchange.

=== New Enum Constants

  * Extending elink:VkStructureType:
  ** ename:VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_ATOMIC_INT64_FEATURES_KHR

=== New SPIR-V Capabilities

  * <<spirvenv-capabilities-table-int64atomics, code:Int64Atomics>>

=== New Structures

  * slink:VkPhysicalDeviceShaderAtomicInt64FeaturesKHR

=== Version History

  * Revision 1, 2018-07-05 (Aaron Hagan)
    - Internal revisions