Intel Corporation

Kyriakos A Stavrou

Grigorios Magklis

Marc Lupon

Raul Martinez

Enric Gibert Codina

Pedro Marcuello

Daniel Ortega

Demos Pavlou

Fernando Latorre

Pedro Lopez

Polychronis Xekalakis

Josep M Codina

Carlos Madriles

Georgios Tournavitis

Lutz Naethke

Mirem Hyuseinova

Rainer Theuer

Crispin Gomez Requena

Christos E Kotselidis

Axel Borkowski

Bert Bretschneider

Antonio Gonzalez

Sridhar Samudrala

Alejandro Martinez Vicente

Javier Carretero Casado

Juan Fernandez

Alejandro Vicente Martinez

Carlos Madriles Gimeno

Antonio Gonzelez

Marti Torrents Lapuerta

A computer-readable storage medium, method and system for optimization-level aware branch prediction is described. A gear level is assigned to a set of application instructions that have been optimized. The gear level is also stored in a register of a branch prediction unit of a processor. Branch prediction is then performed by the processor based upon the gear level.

Instruction and logic for optimization level aware branch prediction

A combination of hardware and software collect profile data for asynchronous events, at code region granularity. An exemplary embodiment is directed to collecting metrics for prefetching events, which are asynchronous in nature. Instructions that belong to a code region are identified using one of several alternative techniques, causing a profile bit to be set for the instruction, as a marker. Each line of a data block that is prefetched is similarly marked. Events corresponding to the profile data being collected and resulting from instructions within the code region are then identified. Each time that one of the different types of events is identified, a corresponding counter is incremented. Following execution of the instructions within the code region, the profile data accumulated in the counters are collected, and the counters are reset for use with a new code region.

Propagating a prefetching profile bit from a prefetch queue to a data cache to indicate that a line was prefetched in response to an instruction within a code region

Disclosed is an apparatus and method to manage instruction cache prefetching from an instruction cache. A processor may comprise: a prefetch engine; a branch prediction engine to predict the outcome of a branch; and dynamic optimizer. The dynamic optimizer may be used to control: identifying common instruction cache misses and inserting a prefetch instruction from the prefetch engine to the instruction cache.

Managed instruction cache prefetching

An error handling method includes identifying a code region eligible for cumulative multiply add (CMA) optimization and translating code region instructions into interpreter code instructions, which may include translating sequences of multiply add instructions in the code region instructions into fusion code including CMA instructions. Floating point (FP) exceptions generated by the fusion code may be monitored and at least a portion of the code region instructions may be re-translated to eliminate some or all fusion code if CMA intermediate rounding exceptions exceed a threshold.

Combined floating point multiplier adder with intermediate rounding logic

An image signal processor is described. The image signal processor includes a block checking circuit. The block checking circuit comprises comparison circuitry to compare a block of luminous pixel values against respective blocks of luminous pixel values that are processed by the image signal processor after the block of luminous pixel values. The block checking circuitry further comprises circuitry to record an entry in a table if one of the blocks of respective luminous pixel values match the block of luminous pixel values. The image signal processor is to store an image signal processing resultant of the block of luminous pixel values and present the stored resultant as a respective resultant for the one of the blocks of respective luminous pixel values if the one of the blocks of respective luminous pixel values matches the block of pixel values.

Image signal processor with a block checking circuit

A mechanism is described for facilitating dynamic and efficient fusion of computing instructions according to one embodiment. A method of embodiments, as described herein, includes monitoring a software program for a program region having fusion candidate instructions for a fusion operation at a computing system; evaluating whether the macro operation of the candidate instructions is valuable to the software program; and performing the fusion operation if it is evaluated to be valuable.

Mechanism for facilitating dynamic and efficient fusion of computing instructions in software programs

Method, process, and apparatus to efficiently store, read, and/or process syllables of word data. A portion of a data word, which includes multiple syllables, may be read by a computer processor. The processor may read a first syllable of the data word from a first memory. The processor may read a second syllable of the data word from a second portion of memory. The second syllable may include bits which are less critical than the bits of the first syllable. The second memory may be distinct from the first memory based on one or more physical attributes.

Split-word memory

Described herein are technologies for optimizing computer code. A code generator can optimize a portion of original code to create optimized code. The code generator can create a partial commit point to indicate that execution of the optimized code produces an invalid architectural state. The code generator can create recovery information recover a valid architectural state at a recovery point. The code generator can associate the partial commit point and recovery information with the optimized code.

Partial commits in dynamic binary translation based systems

Method, process, and apparatus to efficiently store, read, and/or process portions of word data. A portion of a data word, which includes multiple portions, may be read by a computer processor. The processor may read a first portion of the data word from a first memory. The processor may read a second portion of the data word from a second portion of memory. The second portion may include bits which are less critical than the bits of the first portion. The second memory may be distinct from the first memory based on one or more physical attributes.

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Barcelona, Spain

Kyriakos A Stavrou