Samsung S3C2440A User Manual

Page 96

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S3C2440A RISC MICROPROCESSOR

ARM INSTRUCTION SET

3-39

EXAMPLES

LDRH

R1,[R2,-R3]!

; Load R1 from the contents of the halfword address

; contained in R2-R3 (both of which are registers)

; and write back address to R2

STRH

R3,[R4,#14]

; Store the halfword in R3 at R14+14 but don't write back.

LDRSB

R8,[R2],#-223

; Load R8 with the sign extended contents of the byte

; address contained in R2 and write back R2-223 to R2.

LDRNESH

R11,[R0]

; Conditionally load R11 with the sign extended contents

; of the halfword address contained in R0.

HERE

; Generate PC relative offset to address FRED.

STRH

R5, [PC,#(FRED-HERE-8)]; Store the halfword in R5 at address FRED

FRED

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