ZHCU032K December 2004 – August 2022 MSP430AFE221 , MSP430AFE222 , MSP430AFE223 , MSP430AFE231 , MSP430AFE232 , MSP430AFE233 , MSP430AFE251 , MSP430AFE252 , MSP430AFE253 , MSP430F2001 , MSP430F2002 , MSP430F2003 , MSP430F2011 , MSP430F2012 , MSP430F2013 , MSP430F2101 , MSP430F2111 , MSP430F2112 , MSP430F2121 , MSP430F2122 , MSP430F2131 , MSP430F2132 , MSP430F2132-EP , MSP430F2232 , MSP430F2234 , MSP430F2252 , MSP430F2252-Q1 , MSP430F2254 , MSP430F2272 , MSP430F2272-Q1 , MSP430F2274 , MSP430F2274-EP , MSP430F233 , MSP430F2330 , MSP430F235 , MSP430F2350 , MSP430F2370 , MSP430F2410 , MSP430F2416 , MSP430F2417 , MSP430F2418 , MSP430F2419 , MSP430F247 , MSP430F2471 , MSP430F248 , MSP430F2481 , MSP430F249 , MSP430F2491 , MSP430F2616 , MSP430F2617 , MSP430F2618 , MSP430F2619 , MSP430G2001 , MSP430G2101 , MSP430G2102 , MSP430G2111 , MSP430G2112 , MSP430G2121 , MSP430G2131 , MSP430G2132 , MSP430G2152 , MSP430G2153 , MSP430G2201 , MSP430G2201-Q1 , MSP430G2202 , MSP430G2203 , MSP430G2210 , MSP430G2211 , MSP430G2212 , MSP430G2213 , MSP430G2221 , MSP430G2230 , MSP430G2231 , MSP430G2231-Q1 , MSP430G2232 , MSP430G2233 , MSP430G2252 , MSP430G2253 , MSP430G2302 , MSP430G2303 , MSP430G2312 , MSP430G2313 , MSP430G2332 , MSP430G2333 , MSP430G2352 , MSP430G2353 , MSP430G2402 , MSP430G2403 , MSP430G2412 , MSP430G2413 , MSP430G2432 , MSP430G2433 , MSP430G2444 , MSP430G2452 , MSP430G2453 , MSP430G2513 , MSP430G2533 , MSP430G2544 , MSP430G2553 , MSP430G2744 , MSP430G2755 , MSP430G2855 , MSP430G2955 , MSP430TCH5E
MOVX.A | 将源地址字移至目的地址字 | ||
MOVX.[W] | 将源字移动到目的字 | ||
MOVX.B | 将源字节移动到目的字节 | ||
语法 | MOVX.A src,dst | ||
MOVX src,dst 或 MOVX.W src,dst | |||
MOVX.B src,dst | |||
运行 | src→dst | ||
说明 | 源操作数被复制到目的操作数。源操作数不受影响。两个操作数都位于完全地址空间内。 | ||
状态位 | N: | 不受影响 | |
Z: | 不受影响 | ||
C: | 不受影响 | ||
V: | 不受影响 | ||
模式位 | OSCOFF,CPUOFF 和 GIE 不受影响。 | ||
示例 | 将一个 20 位常数 18000h 移动到绝对地址字 EDE |
MOVX.A #018000h,&EDE ; Move 18000h to EDE
示例 | 表 EDE 的内容(字数据,20 位地址)被复制到表 TOM。表的长度为 030h 字。 |
MOVA #EDE,R10 ; Prepare pointer (20-bit address)
Loop MOVX.W @R10+,TOM-EDE-2(R10) ; R10 points to both tables.
; R10+2
CMPA #EDE+60h,R10 ; End of table reached?
JLO Loop ; Not yet
... ; Copy completed
示例 | 表 EDE 的内容(字节数据,20 位地址)被复制到表 TOM。表的长度为 020h 字节。 |
MOVA #EDE,R10 ; Prepare pointer (20-bit)
MOV #20h,R9 ; Prepare counter
Loop MOVX.W @R10+,TOM-EDE-2(R10) ; R10 points to both tables.
; R10+1
DEC R9 ; Decrement counter
JNZ Loop ; Not yet done
... ; Copy completed
MOVX.A 指令的 28 个可能寻址组合中的 10 个可使用 MOVA 指令。这节省了两个字节和代码周期。寻址组合的示例如下: |
MOVX.A Rsrc,Rdst MOVA Rsrc,Rdst ; Reg/Reg
MOVX.A #imm20,Rdst MOVA #imm20,Rdst ; Immediate/Reg
MOVX.A &abs20,Rdst MOVA &abs20,Rdst ; Absolute/Reg
MOVX.A @Rsrc,Rdst MOVA @Rsrc,Rdst ; Indirect/Reg
MOVX.A @Rsrc+,Rdst MOVA @Rsrc+,Rdst ; Indirect,Auto/Reg
MOVX.A Rsrc,&abs20 MOVA Rsrc,&abs20 ; Reg/Absolute
只有当 16 位索引已能满足寻址需求时,下四个复位才可行: |
MOVX.A z20(Rsrc),Rdst MOVA z16(Rsrc),Rdst ; Indexed/Reg
MOVX.A Rsrc,z20(Rdst) MOVA Rsrc,z16(Rdst) ; Reg/Indexed
MOVX.A symb20,Rdst MOVA symb16,Rdst ; Symbolic/Reg
MOVX.A Rsrc,symb20 MOVA Rsrc,symb16 ; Reg/Symbolic