Renesas Renasas Single-Chip Microcomputer SH7086 Manual de usuario descargar pdf (Pagina 152)

134

Chapter 3 Functions

3.2 Functions

eXCHanGe

Exchange

[ Flag Change ]

[ Description Example ]

[ Function ]

[ Selectable src/dest ]

XCHG XCHG

[ Syntax ]

XCHG.size src,dest

• This instruction exchanges contents between

src

and

dest

• If

dest

is an A0 or A1 when the size specifier (.size) you selected is (.B), 16 bits of zero- expanded

src

data are placed in the A0 or A1 and the 8 low-order bits of the A0 or A1 are placed in

src

src dest

R0L/R0 R0H/R1 R1L/R2 R1H/R3 R0L/R0 R0H/R1 R1L/R2 R1H/R3

A0/A0 A1/A1 [A0] [A1] A0/A0 A1/A1 [A0] [A1]

dsp:8[A0] dsp:8[A1] dsp:8[SB] dsp:8[FB] dsp:8[A0] dsp:8[A1] dsp:8[SB] dsp:8[FB]

dsp:16[A0] dsp:16[A1] dsp:16[SB] abs16 dsp:16[A0] dsp:16[A1] dsp:16[SB] abs16

dsp:20[A0] dsp:20[A1] abs20 #IMM dsp:20[A0] dsp:20[A1] abs20

R2R0 R3R1 A1A0 [A1A0] R2R0 R3R1 A1A0

[ Related Instructions ] MOV,LDE,STE

B , W

[ Operation ]

dest src

UIOBSZDC

[ Instruction Code/Number of Cycles ]

Page=

244

Flag

Change

XCHG.B R0L,A0 ; A0’s 8 low-order bits and R0L’s zero-expanded value are exchanged.

XCHG.W R0,A1

XCHG.B R0L,[A0]

1 2 ... 147 148 149 150 151 152 153 154 155 156 157 ... 307 308

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Renesas Renasas Single-Chip Microcomputer SH7086 Manual de usuario Pagina 152