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international symposium on microarchitecture | 1991

The Gmicro/100 32-bit microprocessor

Toyohiko Yoshida; Toru Shimisu; Shigeo Mizugaki; Jun-ichi Hinata

A description is given of the Gmicro/100, a 32-b VLSI microprocessor based on the TRON specification. The Gmicro/100 five-stage pipeline, prejump mechanism, and bitmap manipulation are examined. Performance results are reported. They show that the prejump mechanism, implemented as a hardware solution for the jump problem, executes benchmark programs 16.8% faster on the average. Optimized microinstructions permit bitmap-manipulation instructions to perform two to five times faster than the software loops. The application-specific standard product approach used to implement Gmicro/100 is discussed.<<ETX>>


Archive | 1996

Data processor and control circuit for inserting/extracting data to/from an optional byte position of a register

Toru Shimizu; Shunichi Iwata; Toshio Doi; Shigeo Mizugaki


Archive | 1993

Microcomputer having a system clock frequency that varies in dependence on the number of nested and held interrupts

Norio Masui; Shigeo Mizugaki


Archive | 1992

Data transfer system between registers for microcomputer

Ryohei Higuchi; Shigeo Mizugaki


Archive | 1983

Semiconductor read-only memory device

Shigeo Mizugaki; Tsunenori Umeki


Archive | 1996

Microcomputer for accessing a memory outside the chip by using an address generated from the CPU

Toshio Kishi; Toru Shimizu; Shunichi Iwata; Shigeo Mizugaki; Yuichi Nakao; Toshio Doi


Archive | 1994

Microprogrammed microcomputer with high-speed interrupt for DRAM refresh

Shigeo Mizugaki


Archive | 1995

Register file system for microcomputer including a decoding system for concurrently activating source and destination word lines

Masaaki Arioka; Shigeo Mizugaki


Archive | 1992

Screen display element

Toshio Doi; Shigeo Mizugaki; Yoshinori Hayashi


Archive | 1992

Cache system having only entries near block boundaries

Toshio Doi; Shigeo Mizugaki

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