The 7400 series contains hundreds of devices that provide everything from basic logic gates, flip-flops, and counters, to special purpose bus transceivers and Arithmetic Logic Units ( ALU ).

For execution, the FXU contains the POWER1's fixed-point register file, an arithmetic logic unit ( ALU ) for general instructions, and a dedicated fixed-point multiply and divide unit.

** Processing unit, in Von Neumann computer architecture, contains an arithmetic logic unit ( ALU ) and processor registers

The MP-2 PE chip contains 32 processor elements, each a full 32-bit ALU with floating point, registers, and a barrel shifter.

Each ALU, called a PE slice, contains sixty four 32 bit registers that are used for both integer and floating point.

In addition to using its ALU to perform operations, a CPU is also responsible for reading the next instruction from memory, reading data specified in arguments from memory, and writing results to memory.

* Set the ALU to perform two's-complement addition

This instruction keeps the ALU of the CPU busy for the extra time normally needed to perform a branch.

The control unit decides which operations an ALU should perform ( based on the op code being executed ) and sets the ALU operation.

However, certain processor features tend to lead to designs that have higher-than-average IPC values ; the presence of multiple arithmetic logic units ( an ALU is a processor subsystem that can perform elementary arithmetic and logical operations ), and short pipelines.

The Control Unit of CPU passes the decoded information as a sequence of control signals to the relevant function units of the CPU to perform the actions required by the instruction such as reading values from registers, passing them to the ALU to perform mathematical or logic functions on them, and writing the result back to a register.

* Tightly coupled pipelining allows the 486 to complete a simple instruction like ALU reg, reg or ALU reg, im every clock cycle.

An interesting feature of the 68060 is the ability to execute simple instructions in the address generation unit ( AGU ) and thereby supply the result two cycles before the ALU.

A simple CPU with 8 registers may use 3-to-8 logic decoders inside the instruction decoder to select two source registers of the register file to feed into the ALU as well as the destination register to accept the output of the ALU.

During the execute stage, the two arguments were fed to a simple ALU, which generated the result by the end of the execute stage.

In a simple machine, the register file allows reading two independent registers and writing of a third, all in one ALU cycle with one-cycle or less latency.

The AltiVec unit was improved with the 7450 ; instead of executing one vector permute instruction and one vector ALU ( simple int, complex int, float ) instruction per cycle like 7400 / 7410, the 7450 and its Motorola / Freescale-followers can execute two arbitrary vector instructions simultaneously ( permute, simple int, complex int, float ).

Essentially, it is a small step up from the otherwise similar gate array, but rather than being a prefabricated array of simple logic gates, the macrocell array is a prefabricated array of higher-level logic functions such as flip-flops, ALU functions, registers, and the like.

Two typical components of a CPU are the arithmetic logic unit ( ALU ), which performs arithmetic and logical operations, and the control unit ( CU ), which extracts instructions from memory and decodes and executes them, calling on the ALU when necessary.

If, for instance, an addition operation was requested, the arithmetic logic unit ( ALU ) will be connected to a set of inputs and a set of outputs.

The actual mathematical operation for each instruction is performed by a subunit of the CPU known as the arithmetic logic unit or ALU.

** Arithmetic logic unit ( ALU )-The ALU executes all arithmetic and logic instructions, and provides the results in binary coded form.

The IBM System / 360 has a 32-bit architecture with 16 general-purpose registers, but most of the System / 360 implementations actually use hardware that implemented a much simpler underlying microarchitecture ; for example, the System / 360 Model 30 had 8-bit data paths to the arithmetic logic unit ( ALU ) and main memory and implemented the general-purpose registers in a special unit of higher-speed core memory, and the System / 360 Model 40 had 8-bit data paths to the ALU and 16-bit data paths to main memory and also implemented the general-purpose registers in a special unit of higher-speed core memory.

The 68020 added many improvements to the 68010 including a 32-bit arithmetic logic unit ( ALU ), external data bus and address bus, and new instructions and addressing modes.

The hardware that operates during this stage is contained in the EBOX, which comprises the register file, arithmetic logic unit ( ALU ), barrel shifter, multiplier and condition code logic.

Adders are a part of the core of an arithmetic logic unit ( ALU ).

The Alto had a bit-slice arithmetic logic unit ( ALU ) based on the Texas Instruments ' 74181 chip, a ROM control store with a writable control store extension and had 128 ( expandable to 512 ) kB of main memory organized in 16-bit words.

For example, the part of an arithmetic logic unit, or ALU, that does mathematical calculations is constructed using combinational logic.

It did not even have conventional ALU hardware: all arithmetic was done by table lookup in core memory.

The C-series only included one ALU, but could dispatch and execute an arithmetic instruction, a memory reference, and a branch instruction at the same time, and sustain two instructions per cycle under certain circumstances.

The operands of the arithmetic logic unit ( ALU ) are always the top two registers of the stack and the result from the ALU is stored in the top register of the stack.

This contrasts with the faster fixed-precision arithmetic found in most arithmetic logic unit ( ALU ) hardware, which typically offers between 16 and 64 bits of precision.

Characteristically, the cell's ALU ( i. e. its PE ) in the early versions of GAPP was nothing but a full 1-bit adder / subtractor, which efficiently served both the complex arithmetic as well as logical functions, and with the help of shifts it served also the geometric transformations — in short, it was doing all three types of the tasks ( while other designs used three separate hardware special purpose units instead ).

* Arithmetic logic unit ( ALU )-performs mathematical and logical operations

Register-register loads and ALU operations took 5T ( 20 μs at 0. 5 MHz ), register-memory 8T ( 32 μs ), while calls and jumps ( when taken ) took 11 T-states ( 44 μs ).

The system had separate pipelines for the ALU, floating point adder and multiplier, and could hand off up to three operations per clock.

The usual ALU status flags are available in a numbered register so operations such as " branch on carry clear " are possible.

Both supported larger 32-and 64-bit operands via multiple ALU cycles, and memory-to-memory string operations.

In the write Result stage, ALU operations results are written back to registers and store operations are written back to memory.

The instruction set carries out most ALU actions with postfix ( Reverse Polish notation ) operations that work only on the expression stack, not on data registers or main memory cells.

In modern machines, the time to fetch a variable from the data cache is often several times longer than the time needed for basic ALU operations.

Not all the differences were enhancements: it did not feature a dedicated address generation unit, so that, for example, operations involving an operand in memory requiring address calculation took longer on the 68070 than the 68000, since the same ALU had to do first the effective address calculation and then the operation.

The instruction set featured over 200 instructions, including basic ALU and memory operations, to capability-and process-control instructions.

Multiplication, division, square root, as well as all floating-point operations, were performed by subroutines, using the underlying serial computer ALU primitives add, subtract, shift right, shift left, and increment.