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VR4102 Datasheet(PDF) 530 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) 530 Page - NEC

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CHAPTER 27 CPU INSTRUCTION SET DETAILS
530
ADD
Add
ADD
rs
SPECIAL
0 0 0 0 0 0
rt
rd
0
0 0 0 0 0
ADD
1 0 0 0 0 0
31
26 25
21 20
16 15
11 10
6 5
0
6
5555
6
Format:
ADD 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. In 64-bit mode, the operands must be valid sign-extended, 32-bit values.
An overflow exception occurs if the carries out of bits 30 and 31 differ (2’s complement overflow). The destination
register
rd is not modified when an integer overflow exception occurs.
Operation:
32
T:
GPR [rd] <- GPR [rs] + GPR [rt]
64
T:
temp <- GPR [rs] + GPR [rt]
GPR [rd] <- (temp31)
32
|| temp31...0
Exceptions:
Integer overflow exception



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