Lduh – Renesas M32R-FPU User Manual
Page 105

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M32R-FPU Software Manual (Rev.1.01)
LDUH
LDUH
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
dest
1010
dest
0010
1011
src
1011
src
disp16
LDUH Rdest,@(disp16,Rsrc)
INSTRUCTIONS
3.2 Instruction description