d = vec_subc_u128(a, b)Gets the carry bit of the 128-bit subtraction of two quadword values.
This function operates on the vectors as 128-bit unsigned integers. It returns a vector containing the borrow produced by subtracting b from a, as unsigned 128-bits integers.
If no borrow occurred, the 127-bit of d is 1, otherwise 0. All other bits of d are 0.
| d | a | b |
|---|---|---|
| vector unsigned char | vector unsigned char | vector unsigned char |