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The instruction in the load delay slot cannot use the data loaded by the load instruction. The load delay slot can be filled with an instruction that is not dependent on the load; a NOP is substituted if such an instruction cannot be found. MIPS I has instructions to perform addition and subtraction.
This is a list of processors that implement the MIPS instruction set architecture, sorted by year, process size, frequency, die area, and so on. These processors are designed by Imagination Technologies, MIPS Technologies, and others.
In the early 1990s, MIPS began to license their designs to third-party vendors. This proved fairly successful due to the simplicity of the core, which allowed it to have many uses that would have formerly used much less able complex instruction set computer (CISC) designs of similar gate count and price; the two are strongly related: the price of a CPU is generally related to the number of ...
CPU instruction rates are different from clock frequencies, usually reported in Hz, as each instruction may require several clock cycles to complete or the processor may be capable of executing multiple independent instructions simultaneously. MIPS can be useful when comparing performance between processors made with similar architecture (e.g ...
MIPS was a fabless semiconductor company, that is, they did not have the capability to fabricate integrated circuits. The chip set was initially fabricated for MIPS by Sierra Semiconductor and Toshiba. In December 1987, MIPS licensed Integrated Device Technology, LSI Logic, and Performance Semiconductor to also fabricate and market the R2000 ...
The R8010 executed floating-point instructions provided by an instruction queue on the R8000. The queue decoupled the floating-point pipeline from the integer pipeline, implementing a limited form of out-of-order execution by allowing floating-point instructions to execute when possible after or before the integer instructions from the same ...
The instruction cache is direct-mapped and virtually indexed, physically tagged. It has a 16- or 32-byte line size. Architecturally, it could be expanded to 32 KB. During the third stage (RF), the instruction is decoded and the register file is read. The MIPS III defines two register files, one for the integer unit and the other for floating-point.
Bound copy, from the 1980s, of the MIL-STD-1750A specification document. The 1750A supports 2 16 16-bit words of memory for the core standard. The standard defines an optional memory management unit that allows 2 20 16-bit words of memory using 512 page mapping registers (in the I/O space), defining separate instruction and data spaces, and keyed memory access control.