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AN2367 Fiches technique(PDF) 9 Page - STMicroelectronics

No de pièce AN2367
Description  This application note describes an optimized memory copy
PDF  13 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2367 Fiches technique(HTML) 9 Page - STMicroelectronics

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AN2367
Code (IAR Version)
9/13
SUB
R2, R2, #4
CMP
R2,#3
; remaining <= 3 bytes?
BLS
d_switch
;
switch(remaining_bytes 0,1,2,3)
d_891011
LDR
R3, [R1], #4
MOV
R4, R3, LSR #16
STRH
R3, [R0], #2
STRH
R4, [R0], #2
SUB
R2, R2, #4
CMP
R2,#3
; remaining <= 3 bytes?
BLS
d_switch
;
switch(remaining_bytes 0,1,2,3)
d_12131415
LDR
R3, [R1], #4
MOV
R4, R3, LSR #16
STRH
R3, [R0], #2
STRH
R4, [R0], #2
SUB
R2, R2, #4
d_switch
LDR PC,[PC, R2, LSL#2]
B d_END
DC32
d_END
DC32
d_1B
DC32
d_2B
DC32
d_3B
d_1B
LDRB
R3, [R1]
STRB
R3, [R0]
B
d_END
d_2B
LDRH
R3, [R1]
STRH
R3, [R0]
B
d_END
d_3B
LDRH
R3, [R1], #2
LDRB
R4, [R1]



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