Renesas M32R-FPU Manual do Utilizador descarregar pdf (Página 105)

3-67 M32R-FPU Software Manual (Rev.1.01)

LDUHLDUH

load/store instruction

Load unsigned halfword

[Mnemonic]

(1) LDUH Rdest,@Rsrc

(2)

LDUH Rdest,@(disp16,Rsrc)

[Function]

Load to register from the contents of the memory.

(1) Rdest = *( unsigned short *) Rsrc;

(2) Rdest = *( unsigned short *) ( Rsrc + ( signed short ) disp16 );

[Description]

(1) LDUH zero-extends the halfword data from the memory at the address specified by Rsrc

and loads it into Rdest.

(2) LDUH zero-extends the halfword data in memory at the address specified by Rsrc com-

bined

with the 16-bit displacement, and loads it into Rdest.

The displacement value is sign-extended to 32 bits before the address calculation.

The condition bit (C) is unchanged.

[EIT occurrence]

Address exception (AE)

[Encoding]

LDUH Rdest,@Rsrc

dest1010

dest0010

1011 src

disp16

LDUH Rdest,@(disp16,Rsrc)

INSTRUCTIONS

3.2 Instruction description

1 2 ... 100 101 102 103 104 105 106 107 108 109 110 ... 193 194

Sem comentários

Renesas M32R-FPU Manual do Utilizador Página 105