Renesas Renasas Single-Chip Microcomputer SH7086 Manual de usuario descargar pdf (Pagina 92)

Chapter 3 Functions

3.2 Functions

EXTend Sign

Extend sign

[ Description Example ]

[ Function ]

[ Flag Change ]

EXTS EXTS

[ Syntax ]

EXTS.size dest

• This instruction sign extends

dest

and stores the result in

dest

• If you selected (.B) for the size specifier (.size),

dest

is sign extended to 16 bits.

• If you selected (.W) for the size specifier (.size), R0 is sign extended to 32 bits. In this case, R2 is used

for the upper bytes.

dest

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

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

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

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

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

R2R0 R3R1 A1A0

EXTS.B R0L

EXTS.W R0

B , W

[ Operation ]

dest EXT(dest)

UIOBSZDC

Conditions

S : If you selected (.B) for the size specifier (.size), the flag is set when the operation resulted in MSB

= 1; otherwise cleared. The flag does not change if you selected (.W) for the size specifier (.size).

Z : If you selected (.B) for the size specifier (.size), the flag is set when the operation resulted in 0;

otherwise cleared. The flag does not change if you selected (.W) for the size specifier (.size).

[ Selectable dest ]

[ Instruction Code/Number of Cycles ]

Page=

180

Flag

Change

1 2 ... 87 88 89 90 91 92 93 94 95 96 97 ... 307 308

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