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參數資料
| 型號： | TS8882VF20 |
| 文件頁數： | 26/42頁 |
| 文件大小： | 1703K |
| 代理商： | TS8882VF20 |
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26
TS68882
2119A
–
12/01
Note that data movement instructions perform arithmetic operations, since the result is always
rounded to the precision selected in the FPCR mode control byte. The result is rounded using
the selected rounding mode, and is checked for overflow and underflow.
The syntax for the move is:
where:
(ea) is an TS 68000 Family effective address operand and (fmt) is the data format size. FPm
and FPn are floating-point data registers.
Move Multiples
The floating-point move multiple instructions on the TS 68882 are much like the integer coun-
terparts on the TS 68000 Family processors. Any set of the floating-point registers FP0
through FP7 can be moved to or from memory with one instruction. These registers are
always moved as 96-bit extended data with no conversion (hence no possibility of conversion
errors). Some move multiple examples are as follows:
Move multiples are useful during context switches and interrupts to save or restore the state of
a program. These moves are also useful at the start and end of a procedure to save and
restore the calling routine
’
s register set. In order to reduce procedure call overhead, the list of
registers to be saved or restored can be contained in a data register. This allows run-time opti-
mization by allowing a called routine to save as few registers as possible. Note that no
rounding or overflow/underflow checking is performed by these operations.
Monadic
Operations
Monadic operations have one operand. This operand may be in a floating-point data register,
memory, or in an MPU data register. The result is always stored in a floating-point data regis-
ter. For example, the syntax for square root is:
The TS 68882 monadic operations available are as follows:
FMOVE.(fmt)
(ea).FPn
Move to TS 68882
FMOVE.(fmt)
FPm.(ea)
Move from TS 68882
FMOVE.X
FPm.FPn
Move within TS 68882
FMOVEM
(ea), FP0-FP3/FP7
FMOVEM
FP2/FP4/FP6,(ea)
FSQRT.(fmt)
(ea), FPN or,
FSQRT.X
FPm, FPn or,
FSQRT.X
FPn
FABS
Absolute Value
FACOS
Arc Cosine
FASIN
Arc Sine
FATAN
Arc Tangent
FATANH
Hyperbolic Arc Tangent
FCOS
Cosine
FCOSH
Hyperbolic Cosine
FETOX
e to the x Power
FETOXM1
e to the x Power - 1
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