Instruction processing is performed for an instruction. The instruction is configured to perform a function, which is to be performed in a plurality of processing phases. A processing phase is defined to store up to a selected amount of data. A determination is made as to whether a store into a designated area occurred based on processing a select processing phase of the function. Based on determining that the store into the designated area occurred, an interrupt is presented.

A method of and system for performing metadata tag compression in security policy enforcement system may comprise conveying a set of data elements, each with an associated metadata tag, from a first processor subsystem to a second processor subsystem. The first processor subsystem may be configured to process conventional tasks, the second processor configured to apply one or more policy decisions to the data element. The conveying may further comprise sending the set of data elements along with an index element that identifies one or more metadata tags, and sending one or more of the metadata tags identified by the index element.

A method is provided that includes performing, by a processor in response to a dual issue multiply instruction, multiplication of operands of the dual issue multiply instruction using multiplication units comprised in a data path of the processor and configured to operate together to determine a product of the operands, and storing, by the processor, the product in a storage location indicated by the dual issue multiply instruction.

An exception summary is provided for an invalid value detected during instruction execution. An indication that a value determined to be invalid was included in input data to a computation of one or more computations or in output data resulting from the one or more computations is obtained. The value is determined to be invalid due to one exception of a plurality of exceptions. Based on obtaining the indication that the value is determined to be invalid, a summary indicator is set. The summary indicator represents the plurality of exceptions collectively.

Techniques are described for metadata processing that can be used to encode an arbitrary number of security policies for code running on a processor. Metadata may be added to every word in the system and a metadata processing unit may be used that works in parallel with data flow to enforce an arbitrary set of policies. In one aspect, the metadata may be characterized as unbounded and software programmable to be applicable to a wide range of metadata processing policies. Techniques and policies have a wide range of uses including, for example, safety, security, and synchronization. Additionally, described are aspects and techniques in connection with metadata processing in an embodiment based on the RISC-V architecture.

An apparatus comprises processing circuitry which has a hypervisor execution mode for execution of a hypervisor for managing one or more virtual processors executing on the processing circuitry, and at least one less privileged execution mode than the hypervisor execution mode. In response to a conditional yield to hypervisor instruction executed in the at least one less privileged execution mode, an instruction decoder controls the processing circuitry to determine whether at least one trap condition is satisfied, and when the at least one trap condition is determined to be satisfied, to switch the processing circuitry to the hypervisor execution mode; and store, in at least one storage element accessible to instructions executed in the hypervisor execution mode, at least one item of scheduling hint information for estimating whether the at least one trap condition is still satisfied.

Systems and methods are provided for generating an event type and extending event message streaming. The generating an event type includes receiving event definition data. The disclosed technology includes an event type generator that generates scripts in a variety of languages for processing an event of the event type and event dictionary data including event schema associated with the event type. The event dictionary data represents a lightweight library package for merging into a micro service. The event type generator further registers the event type in an event message streamer thereby extending the event message streaming with the event type. The event message streamer provides an event bus that receives an event of the registered event type from a micro service for publishing. The event message streamer delivers the event in an event message to one or more micro services that subscribes to the event type for consuming.

An apparatus and method for a speculative conditional move instruction. A processor comprising: a decoder to decode a first speculative conditional move instruction; a prediction storage to store prediction data related to previously executed speculative conditional move instructions; and execution circuitry to read first prediction data associated with the speculative conditional move instruction and to execute the speculative conditional move instruction either speculatively or non-speculatively based on the first prediction data.

Micro-architecture designs and methods are provided. A computer processing architecture may include an instruction cache for storing producer instructions, a half-instruction cache for storing half instructions, and eager shelves for storing a result of a first producer instruction. The computer processing architecture may fetch the first producer instruction and a first half instruction; send the first half instruction to the eager shelves; based on execution of the first producer instruction, send a second half instruction to the eager shelves; assemble the first producer instruction in the eager shelves based on the first half instruction and the second half instruction; and dispatch the first producer instruction for execution.

Techniques are described for metadata processing that can be used to encode an arbitrary number of security policies for code running on a processor. Metadata may be added to every word in the system and a metadata processing unit may be used that works in parallel with data flow to enforce an arbitrary set of policies. In one aspect, the metadata may be characterized as unbounded and software programmable to be applicable to a wide range of metadata processing policies. Techniques and policies have a wide range of uses including, for example, safety, security, and synchronization. Additionally, described are aspects and techniques in connection with metadata processing in an embodiment based on the RISC-V architecture.