參數(shù)資料
型號(hào)： TS68882MF20
廠商： ATMEL CORP
元件分類： 數(shù)學(xué)處理器
英文描述： CMOS Enhanced Floating-point Co-processor
中文描述： MATH COPROCESSOR, CQFP68
封裝： CERAMIC, QFP-68
文件頁(yè)數(shù)： 30/43頁(yè)
文件大小： 1414K
代理商： TS68882MF20
30
TS68882
2119A
–
HIREL
–
04/02
Miscellaneous
Instructions
Miscellaneous instructions include moves to and from the status, control, and instruction
address registers and a no operation function that can be used to
“
flush
”
exceptions.
Also included are the virtual memory/machine FSAVE and FRESTORE instructions that
save and restore the internal state of the TS68882.
Addressing Modes
The TS68882 does not perform address calculations. This satisfies the criterion that a
TS68000 Family co-processor must not depend on certain features or capabilities that
may or may not be implemented by a given main processor. Thus, when the TS68882
instructs the TS68020/TS68030 to transfer an operand via the co-processor interface,
the MPU performs the addressing mode calculations requested in the instruction. In this
case, the instruction is encoded specifically for the TS68020/TS68030, and the execu-
tion of the TS68882 is not dependent on that encoding, but only on the value of the
command word written to the TS68882 by the main processor.
T
True
Note: The following conditional tests set the BSUN bit in the status register exception byte if the NAN condition code bit is set when a
conditional instruction is executed.
SF
Signaling False
SEQ
Signaling Equal
GT
Greater Than
GE
Greater Than or Equal
LT
Less Than
LE
Less Than or Equal
GL
Greater or Less Than
GLE
Greater Less or Equal
NGLE
Not (Greater, Less or Equal)
NGL
Not (Greater or Less)
NLE
Not (Less or Equal)
NLT
Not (Less Than)
NGE
Not (Greater or Equal)
NGT
Not (Greater Than)
SNE
Signaling Not Equal
ST
Signaling True
Table 9.
Floating-point Conditional Test Specifiers (Continued)
Mnemonic
Definition
FMOVE
(ea),FPcr
Move to Control Register(s)
FMOVE
FPcr,(ea)
Move from Control Register(s)
FNOP
No Operation
FSAVE
(ea)
Virtual Machine State Save
FRESTORE
(ea)
Virtual Machine State Restore
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