ARM10 PROCESSOR PDF

A bit wide split instruction and data memory is used to allow multiple instructions to be fetched in one clock cycle. This is exploited using the first two pipeline stages, which perform static branch prediction and instruction issue. As in the ARM8 , backward branches are predicted "taken", and forward branches are predicted "not taken", for the two normal branch cases of loops and function calls respectively. Memory Access In addition to the increased instruction issuing capability, the wider memory bus allows for faster load and store operations.

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A bit wide split instruction and data memory is used to allow multiple instructions to be fetched in one clock cycle. This is exploited using the first two pipeline stages, which perform static branch prediction and instruction issue. As in the ARM8 , backward branches are predicted "taken", and forward branches are predicted "not taken", for the two normal branch cases of loops and function calls respectively.

Memory Access In addition to the increased instruction issuing capability, the wider memory bus allows for faster load and store operations. ARM10 allows two register transfers to or from memory in one cycle, which vastly improves performance of the commonly-used Load Multiple and Store Multiple instructions. Further to this, the newly introduced instruction issue pipeline stage allows for non-blocking memory access. Also note that, since two registers are fetched from memory every cycle, the MOVEQ instruction is able to use r4 as a source operand only four instructions later.

Multiplication A new fast 16x32 hardware multiplier , combined with the two-stage multiplication pipeline , allows ARM10 to complete a bit multiply-accumulate operation every clock cycle. This is a huge increase in performance from previous cores, which even with the TDMI extensions required between 3 and 5 cycles for a multiplication.

Production ARM10 processors actually support v5TE, which adds signal processing saturate-on-overflow instructions. The ARME was later fabricated on 0. Astonishingly, it does this at 1. Their core scales from MHz mW, 0.

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These include SIMD media instructions, multiprocessor support and a new cache architecture. The implementation included a significantly improved instruction processing pipeline, compared to previous ARM9 or ARM10 families, and is used in smartphones from Apple , Nokia , and others. Microarchitecture improvements in ARM11 cores [3] include: SIMD instructions which can double MPEG-4 and audio digital signal processing algorithm speed Cache is physically addressed, solving many cache aliasing problems and reducing context switch overhead. Unaligned and mixed-endian data access is supported. In particular, trace semantics were updated to address parallel instruction execution and data transfers. ARM makes an effort to promote recommended Verilog coding styles and techniques.

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ARM architecture

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