Update documentation
Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
diff --git a/library/ecp_invasive.h b/library/ecp_invasive.h
index bf31f0c..3ee238e 100644
--- a/library/ecp_invasive.h
+++ b/library/ecp_invasive.h
@@ -84,8 +84,10 @@
* is a 192 bit MPI.
*
* \param[in,out] Np The address of the MPI to be converted.
- * Must have twice as many limbs as the modulus so
- * 384 bits in length.
+ * Must have twice as many limbs as the modulus.
+ * Upon return this holds the reduced value. The bitlength
+ * of the reduced value is the same as that of the modulus
+ * (192 bits).
* \param[in] Nn The length of \p Np in limbs.
*/
MBEDTLS_STATIC_TESTABLE