參數資料
型號： ARM610
廠商： Mitel Networks Corporation
英文描述： General Purpose 32-Bit Microprocessor with 4kByte Cache,Write Buffer and Memory Management Unit(通用32位微處理器（帶4K字節(jié)緩存，寫緩沖器和存儲器管理單元）)
中文描述： 通用32位微處理器4KB的高速緩存，寫緩沖器和存儲器管理單元（通用32位微處理器（帶4K的字節(jié)緩存，寫緩沖器和存儲器管理單元））
文件頁數： 82/174頁
文件大?。?/td> 694K
代理商： ARM610
Instruction Set - MRC, MCR
ARM610 Data Sheet
4-54
O
4.14.2 Transfers to R15
When a coprocessor register transfer to ARM610 has R15 as the destination, bits 31,
30, 29 and 28 of the transferred word are copied into the N, Z, C and V flags
respectively. The other bits of the transferred word are ignored, and the PC and other
CPSR bits are unaffected by the transfer.
4.14.3 Transfers from R15
A coprocessor register transfer from ARM610 with R15 as the source register will store
the PC+12.
4.14.4 Instruction cycle times
MRC instructions take 1S + (b+1)I +1C incremental cycles to execute, where S, I and
C are as defined in
·
6.2 Cycle Typeson page 6-2.
MCR instructions take 1S + bI +1C incremental cycles to execute, where bis the
number of cycles spent in the coprocessor busy-wait loop.
4.14.5 Assembler syntax
<MCR|MRC>{cond} p#,<expression1>,Rd,cn,cm{,<expression2>}
MRC
move from coprocessor to ARM610 register (L=1)
MCR
move from ARM610 register to coprocessor (L=0)
{cond}
two character condition mnemonic. See
·
Table 4-2:
Condition code summaryon page 4-6.
p#
the unique number of the required coprocessor
<expression1>
evaluated to a constant and placed in the CP Opc field
Rd
is an expression evaluating to a valid ARM610 register
number
cn and cm
are expressions evaluating to the valid coprocessor register
numbers CRn and CRm respectively
<expression2>
where present is evaluated to a constant and placed in the
CP field
4.14.6 Examples
MRC
p2,5,R3,c5,c6
; Request coproc 2 to perform operation 5
; on c5 and c6, and transfer the (single
; 32-bit word) result back to R3.
MCR
p6,0,R4,c5,c6
; Request coproc 6 to perform operation 0
; on R4 and place the result in c6.
MRCEQ p3,9,R3,c5,c6,2 ; Conditionally request coproc 3 to
; perform operation 9 (type 2) on c5 and
; c6, and transfer the result back to R3.
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