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3-61 M32R-FPU Software Manual (Rev.1.01)

LDLD

load/store instruction

Load

[Mnemonic]

(1) LD Rdest,@Rsrc

(2)

LD Rdest,@Rsrc+

(3)

LD Rdest,@(disp16,Rsrc)

[Function]

Load to register from the contents of the memory.

(1) Rdest = *( int *) Rsrc;

(2) Rdest = *( int *) Rsrc, Rsrc += 4;

(3) Rdest = *( int *) ( Rsrc + ( signed short ) disp16 );

[Description]

(1) The contents of the memory at the address specified by Rsrc are loaded into Rdest.

(2) The contents of the memory at the address specified by Rsrc are loaded into Rdest.

Rsrc is post incremented by 4.

(3) The contents of the memory at the address specified by Rsrc combined with the 16-

bit displacement are loaded 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]

dest0010 LD Rdest,@Rsrc

dest1010

dest0010 LD Rdest,@Rsrc+

LD Rdest,@(disp16,Rsrc)

1100 src

1110 src

1100 src

disp16

INSTRUCTIONS

3.2 Instruction description

1 2 ... 94 95 96 97 98 99 100 101 102 103 104 ... 193 194

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