SMIDNV(3)

# SMIDNV(3) Manual Page

## Name

SMIDNV - SM ID on which a shader invocation is running

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## Description

`SMIDNV`

  Decorating a variable with the `SMIDNV` built-in decoration will make that variable contain the ID of the SM on which the current shader invocation is running. This variable is in the range [0, `SMCountNV`-1].

Valid Usage

- VUID-SMIDNV-SMIDNV-04365
  The variable decorated with `SMIDNV` must be declared using the `Input` `Storage` `Class`

- VUID-SMIDNV-SMIDNV-04366
  The variable decorated with `SMIDNV` must be declared as a scalar 32-bit integer value

## See Also

No cross-references are available

## Document Notes

For more information, see the Vulkan Specification.

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0