Apparatus for decoding instruction immediate data to produce a s

Details Apparatus for decoding instruction immediate data to produce a s Apparatus for decoding instruction immediate data to produce a s

1996-06-10

1998-04-28

Lall, Parshotam S.

Coded data generation or conversion

Digital code to digital code converters

Tree structure

395381, 395705, 341 51, G06F 9308

Patent

active

057457220

ABSTRACT:
An instruction decoder decodes an instruction code, whereupon immediate data, if included, is searched to see whether it is encoded or not. After decoding, an operation code in the instruction code is informed to the execution unit. If the instruction code includes immediate data, the data is transmitted to a data decoder to be decoded according to a given rule. The decoded data is transmitted to the execution unit. Because the immediate data is reduced in size through encoding, the number of times instructions are fetched is accordingly reduced, which resultantly increases processing efficiency. Since an entire instruction code is also reduced in size, a wider variety of operations are instructed using the same instruction code format.

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"32 Bit RISC Single Chip Microcomputer V850 Family"; SUD-T-2288; NEC Corporation 1994, 1995; 1995 Apr. 21.
MN10200 Series; "Micro Computer: Data Book: 1993.11"; Panasonic, pp. 151-159.
"NEC 32 Bit RISC Single Chip Microcomputer V850 Family"; SUD-T-2288; NEC Corporation 1994, 1995; 1995 Apr. 21 with partial translation.
Matsushita Electronics Corporation MN10200 Series; "Micro Computer: Data Book: 1993.11"; Panasonic; pp. 151-159 (partial translation only).
"NEC V810TM--32 Bit Microprocessor", IEU-789B; Sep. 1993, pp. 3, 4 and 75-78 with partial translation.
"NEC Microcomputer"; Apr. 1996; pp. 14-20 with partial translation.

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