Renesas M32R-FPU Manual Do Utilizador

3

3-66

M32R-FPU Software Manual (Rev.1.01)

load/store instruction

 

 LDUB  Rdest,@Rsrc

 

 LDUB  Rdest,@(disp16,Rsrc)

Load to register from the contents of the memory.

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

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

(1)   LDUB zero-extends the byte data from the memory at the address specified by Rsrc and

        loads it into Rdest.

(2)   LDUB zero-extends the byte data of the 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 address calculation.

        The condition bit (C) is unchanged.

None

INSTRUCTIONS

3.2 Instruction description