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Send til en ven   Udskriv4/10 2010 kl. 16:58
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Næste generation af V850-kerne understøtter SIMD

Renesas udvikler ny 32-bit V850 CPU-kerne med SIMD support, hvilket giver markant forbedrede signalprocesseringsegenskaber (in english).

Renesas Electronics has announced the development of a new 32-bit V850 CPU core, the V850E2H, that enables both real-time control and signal processing performance on a par with digital signal processors (DSPs). It is designed to meet demand for better processing performance in embedded systems such as factory automation (FA) equipment and automotive control units for engine control.

The main features of the V850E2H core are: 
- An integrated coprocessor with single instruction multiple data (SIMD) support that allows processing of four units of data to be executed by a single instruction, enabling excellent signal processing performance without the need for an external DSP;
- and a high-speed branch predictor for rapid execution of loop instructions, so that even programs composed of basic instructions that do not include signal processing will run approximately 10 percent faster. These features make it easier for system designers to incorporate MCUs with

built-in V850E2H CPU core into their systems.

In the field of real-time control systems requiring high-speed signal processing, such as FA equipment and automotive control units, a shift to electronics has been advancing rapidly in recent years and demands for faster signal processing are rapidly increasing. Nowadays, high-end embedded systems typically include a DSP for signal processing in addition to a CPU.

However, since the CPU must communicate with externally connected devices such as DSPs via low-speed memory devices, it was extremely difficult to maintain the high interrupt responsiveness essential in these fields when changing the processing details in response to interrupts. In addition, such high-end embedded systems require a substantial investment of development man-hours. This is due to the need to create a control program to run on the CPU and a separate signal processing program to run on the DSP, which must be designed and tested using separate development environments and then tested and verified to ensure interoperation between the CPU and DSP.

In response to this demand for better performance and reduced time and resources for development, Renesas Electronics has developed the V850E2v4 architecture, which combines the excellent control performance of existing CPU cores such as the V850E2M with superior signal processing performance. The V850E2v4 architecture boosts both control performance and signal processing performance, surpassing that of the earlier architecture while also offering enhanced basic functions and SIMD extensions for signal processing. The V850E2H is the first CPU core to be based on this new architecture.

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