Abstract:
A method and apparatus for controlling system access to a memory that includes receiving first and second instructions, and evaluating whether both instructions can architecturally complete. When at least one instruction cannot architecturally complete, delaying both instructions. When both instructions can architecturally complete and at least one is a write instruction, adjusting a write control of the memory to account for an evaluation delay. The evaluation delay can be sufficient to evaluate whether both instructions can architecturally complete. The evaluation delay can be input to the write control and not the read control of the memory. A precharge clock of the memory can be adjusted to account for the evaluation delay. Evaluating whether both instructions can architecturally complete can include determining whether data for each instruction is located in a cache, and whether the instructions are memory access instructions.
Abstract:
A multi-stage multiplexing operation that includes combined selection and data alignment or data replication is disclosed. In a particular embodiment, a method includes performing a first stage of a multi-stage multiplexing operation. During the first stage, a first data source is selected from a first plurality of data sources. At least one of a first data alignment operation and a first data replication operation is also performed on first data from the selected first data source during the first stage.
Abstract:
The disclosure includes a method and system of configuring a translation lookaside buffer (TLB). In an embodiment, the TLB includes a first portion and a second portion. The first portion or the second portion may be selectively disabled in response to a value of a TLB configuration indicator.
Abstract:
Systems and methods of data extraction in a vector processor are disclosed. In a particular embodiment a method of data extraction in a vector processor includes copying at least one data element to a source register of a permutation network. The method includes reordering multiple data elements of the source register, populating a destination register of the permutation network with the reordered data elements, and copying the reordered data elements from the destination register to a memory.
Abstract:
An apparatus includes selection logic configured to select a first subset of a first set of samples stored at a first set of registers. The first subset includes a first sample stored at a first register of the first set of registers and further includes a second sample stored at a second register of the first set of registers. The apparatus further includes shift logic configured to shift a second set of samples stored at a second set of registers. The apparatus further includes a channel estimator configured to generate a first value associated with a channel estimate based on the first subset and further based on a second subset of the shifted second set of samples.
Abstract:
Systems and methods relate to a mixed-width single instruction multiple data (SIMD) instruction which has at least a source vector operand comprising data elements of a first bit-width and a destination vector operand comprising data elements of a second bit-width, wherein the second bit-width is either half of or twice the first bit-width. Correspondingly, one of the source or destination vector operands is expressed as a pair of registers, a first register and a second register. The other vector operand is expressed as a single register. Data elements of the first register correspond to even-numbered data elements of the other vector operand expressed as a single register, and data elements of the second register correspond to data elements of the other vector operand expressed as a single register.
Abstract:
An instruction identifies a register and a memory location. Upon execution of the instruction by a processor, an item is loaded from the memory location and a shift and insert operation is performed to shift data in the register and to insert the item into the register.