Abstract: A method, apparatus, and article of manufacture for hash lookups using valid bit tables with pointers. A key is compressed by hashing the key using a hash function. The hash key is used as a valid bit index into the valid bit table. A first pointer associated with the valid bit index is then used as a pointer into a first block of entries in a result table. A sum of transition bits in the valid bit table below the valid bit index is used as a result index into the first block of entries in the result table. The result index into the first block of entries may be used to reference a result of the radix search tree lookup. Extra space is added in the result table to enable insertion of entries after the first block of entries. A second pointer is used to add redundant entries from the first block of entries into a second block of entries in the result table.

Abstract: A method, apparatus, and article of manufacture for performing a radix search tree lookup with a key using a transition table with pointers. The key is used as a transition index into the transition table. A first pointer associated with the transition index is then used as a pointer into a first block of entries in a result table. A sum of transition bits in the transition table below the transition index is used as a result index into the first block of entries in the result table. The result index into the first block of entries may be used to reference a result of the radix search tree lookup. Extra space is added in the result table to enable insertion of entries after the first block of entries. A second pointer is used to add redundant entries from the first block of entries into a second block of entries in the result table.

Abstract: A method, apparatus, and article of manufacture for performing a radix search tree lookup with a key using a valid bit table with pointers. The key is used as a valid bit index into the valid bit table. A first pointer associated with the valid bit index is then used as a pointer into a first block of entries in a result table. A sum of valid bits in the valid bit table below the valid bit index is used as a result index into the first block of entries in the result table. The result index into the first block of entries may be used to reference a result of the radix search tree lookup. Extra space is added in the result table to enable insertion of entries after the first block of entries. A second pointer is used to add redundant entries from the first block of entries into a second block of entries in the result table.

Abstract: A method, apparatus, and article of manufacture for performing compressed radix search tree lookups using transition tables. The key is used as a transition index into the transition table. A sum of transition bits in the transition table below the transition index is used as a result index into the result table. The result index into the result table may be used to reference a result of the radix search tree lookup.

Abstract: A method and apparatus for processing network packets is disclosed. A Single Instruction Multiple Data (SIMD) architecture processor is disclosed. The SIMD processor includes several instructions designed specifically for the task of network packet processing. For example, SIMD add instructions for performing one's complement additions are included to quickly calculate Internet checksums. Furthermore, the SIMD processor includes several instructions for performing lane arithmetic.