kernel.subgroup.match.all
← kernel dialect
Return a lane mask and predicate describing whether all active subgroup lanes hold the same scalar value.
Operation contract
| Property |
Value |
| Semantic phase |
executable |
| Traits |
Convergent, HasAncestor(kernel.def) |
| Target contracts |
kernel.synchronization |
Signature
| Kind |
Name |
Type |
Cardinality |
Description |
| Operand |
value |
scalar |
required |
Value to compare across active subgroup lanes. |
| Result |
mask |
integer |
required |
Integer lane-equality mask. |
| Result |
all_equal |
i1 |
required |
True when all active lanes match. |
Examples
%mask, %all = kernel.subgroup.match.all %v : i32 -> i64, i1