3.126. __nv_ffs

i32 @__nv_ffs(i32 %x)

Find the position of the least significant bit set to 1 in a 32 bit integer.

Find the position of the first (least significant) bit set to 1 in x, where the least significant bit position is 1.

Returns

Returns a value between 0 and 32 inclusive representing the position of the first bit set.