摘要:
A key scheduler performs a key-expansion to generate round keys for AES encryption and decryption just-in-time for each AES round. The key scheduler pre-computes slow operations in a current clock cycle to reduce the critical delay path for computing the round key for a next AES round.
摘要:
A flexible aes instruction for a general purpose processor is provided that performs aes encryption or decryption using n rounds, where n includes the standard aes set of rounds {10, 12, 14}. A parameter is provided to allow the type of aes round to be selected, that is, whether it is a “last round”. In addition to standard aes, the flexible aes instruction allows an AES-like cipher with 20 rounds to be specified or a “one round” pass.
摘要:
A flexible aes instruction for a general purpose processor is provided that performs aes encryption or decryption using n rounds, where n includes the standard aes set of rounds {10, 12, 14}. A parameter is provided to allow the type of aes round to be selected, that is, whether it is a “last round”. In addition to standard aes, the flexible aes instruction allows an AES-like cipher with 20 rounds to be specified or a “one round” pass.
摘要:
A flexible aes instruction for a general purpose processor is provided that performs aes encryption or decryption using n rounds, where n includes the standard aes set of rounds {10, 12, 14}. A parameter is provided to allow the type of aes round to be selected, that is, whether it is a “last round”. In addition to standard aes, the flexible aes instruction allows an AES-like cipher with 20 rounds to be specified or a “one round” pass.
摘要:
A flexible aes instruction set for a general purpose processor is provided. The instruction set includes instructions to perform a “one round” pass for aes encryption or decryption and also includes instructions to perform key generation. An immediate may be used to indicate round number and key size for key generation for 128/192/256 bit keys. The flexible aes instruction set enables full use of pipelining capabilities because it does not require tracking of implicit registers.
摘要:
An embodiment may include circuitry to execute, at least in part, a first list of instructions and/or to concurrently process, at least in part, first and second buffers. The execution of the first list of instructions may result, at least in part, from invocation of a first function call. The first list of instructions may include at least one portion of a second list of instructions interleaved, at least in part, with at least one other portion of a third list of instructions. The portions may be concurrently carried out, at least in part, by one or more sets of execution units of the circuitry. The second and third lists of instructions may implement, at least in part, respective algorithms that are amenable to being invoked by separate respective function calls. The concurrent processing may involve, at least in part, complementary algorithms.
摘要:
A number of addition instructions are provided that have no data dependency between each other. A first addition instruction stores its carry output in a first flag of a flags register without modifying a second flag in the flags register. A second addition instruction stores its carry output in the second flag of the flags register without modifying the first flag in the flags register.
摘要:
A method in one aspect may include receiving an add instruction. The add instruction may indicate a first source operand, a second source operand, and a third source operand. A sum of the first, second, and third source operands may be stored as a result of the add instruction. The sum may be stored partly in a destination operand indicated by the add instruction and partly a plurality of flags. Other methods are also disclosed, as are apparatus, systems, and instructions on machine-readable medium.
摘要:
A method in one aspect may include receiving an add instruction. The add instruction may indicate a first source operand, a second source operand, and a third source operand. A sum of the first, second, and third source operands may be stored as a result of the add instruction. The sum may be stored partly in a destination operand indicated by the add instruction and partly a plurality of flags. Other methods are also disclosed, as are apparatus, systems, and instructions on machine-readable medium.
摘要:
An embodiment may include circuitry to execute, at least in part, a first list of instructions and/or to concurrently process, at least in part, first and second buffers. The execution of the first list of instructions may result, at least in part, from invocation of a first function call. The first list of instructions may include at least one portion of a second list of instructions interleaved, at least in part, with at least one other portion of a third list of instructions. The portions may be concurrently carried out, at least in part, by one or more sets of execution units of the circuitry. The second and third lists of instructions may implement, at least in part, respective algorithms that are amenable to being invoked by separate respective function calls. The concurrent processing may involve, at least in part, complementary algorithms.