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6.8 WORD-TO-WORD COMPRESSION Instruction (BPRESS)

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6.8 WORD-TO-WORD COMPRESSION Instruction (BPRESS)

[Outline]

The BPRESS instruction stores the lower-place bytes of the word sequence stored in the transfer source

registers (Source) in the byte sequence of the transfer destination registers (Dest). The higher-place

bytes of the transfer source registers are ignored. This function is the reverse of that of the BEXTD

instruction.

VWxxxxx

When the number of transfered bytes

is an odd number, "0" is set.

V=S, I, O, M, D

DestSource

Number of

Transfers

(Number of bytes)

a (Lower byte)

b (Upper byte)

a (Lower byte)

xxH (Upper byte)

xxH

VWyyyyy

VWyyyyy+2

VWyyyyy+1

In the case of BPRESS VWxxxxx to VWyyyyy B=N

VWxxxxx+1

VWxxxxx+2

VWxxxxx+3

VWxxxxx+4

[Format]

Symbol : BPRESS

Full Name : Compress Word to Byte

Category : MOVE

Icon :

[Parameter]

Parameter Name Setting

Source · Any integer type register

· Any integer type register with subscript

Dest · Any integer type register (except for # and C registers)

· Any integer type register with subscript (except for # and C registers)

Byte Width · Any integer type register

· Any integer type register with subscript

· Constant

1 2 ... 108 109 110 111 112 113 114 115 116 117 118 ... 219 220

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