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VR4102 Datasheet(PDF) 533 Page - NEC

Part # VR4102
Description  64/32-bit Microprocessor
PDF  701 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

VR4102 Datasheet(HTML) 533 Page - NEC

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CHAPTER 27 CPU INSTRUCTION SET DETAILS
533
ADDU
Add Unsigned
ADDU
rs
SPECIAL
0 0 0 0 0 0
rt
rd
0
0 0 0 0 0
ADDU
1 0 0 0 0 1
31
26 25
21 20
16 15
11 10
6 5
0
6
5555
6
Format:
ADDU rd, rs, rt
Description:
The contents of general register
rs and the contents of general register rt are added to form the result. The result
is placed into general register
rd. No integer overflow exception occurs under any circumstances. In 64-bit
mode, the operands must be valid sign-extended, 32-bit values.
The only difference between this instruction and the ADD instruction is that ADDU never causes an integer
overflow exception.
Operation:
32
T:
GPR [rd] <- GPR [rs] + GPR [rt]
64
T:
temp <- GPR [rs] + GPR [rt]
GPR [rd] <- (temp31)
32 || temp31...0
Exceptions:
None



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