SPIR-V Built-In
SubgroupLeMask
Mask of shader invocations in a subgroup with the same or lower subgroup local invocation ID
SubgroupLeMask
Decorating a variable with the SubgroupLeMask builtin decoration will
make that variable contain the subgroup mask of the current subgroup
invocation.
The bits corresponding to the invocations less than or equal to
SubgroupLocalInvocationId are set in the variable decorated with
SubgroupLeMask.
All other bits are set to zero.
SubgroupLeMaskKHR is an alias of SubgroupLeMask.
Valid Usage
VUID-SubgroupLeMask-SubgroupLeMask-04376
The variable decorated with SubgroupLeMask must be declared using
the Input Storage Class
VUID-SubgroupLeMask-SubgroupLeMask-04377
The variable decorated with SubgroupLeMask must be declared as a
four-component vector of 32-bit integer values