Motorola CPU32 Bedienungsanleitung Seite 377

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Floating Point Instructions
MOTOROLA M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL 5-75
FMOVE Move Floating-Point Data Register FMOVE
(MC6888X, MC68040)
Instruction Format:
< EA > TO REGISTER
Instruction Fields:
Effective Address field—Determines the addressing mode for external operands.
If R/M = 0, this field is unused and should be all zeros.
If R/M = 1, specifies the location of the source operand. Only data addressing modes
can be used as listed in the following table:
*Only if < fmt > is byte, word, long, or single.
R/M field—Specifies the source operand address mode.
0 The operation is register to register.
1 The operation is < ea > to register.
1514131211109876543210
1111
COPROCESSOR
ID
000
EFFECTIVE ADDRESS
MODE REGISTER
0 R/M 0
SOURCE
SPECIFIER
DESTINATION
REGISTER
OPMODE
Addressing Mode Mode Register Addressing Mode Mode Register
Dn* 000 reg. number:Dn (xxx).W 111 000
An (xxx).L 111 001
(An) 010 reg. number:An # < data > 111 100
(An) + 011 reg. number:An
– (An) 100 reg. number:An
(d
16
,An) 101 reg. number:An (d
16
,PC) 111 010
(d
8
,An,Xn) 110 reg. number:An (d
8
,PC,Xn) 111 011
(bd,An,Xn) 110 reg. number:An (bd,PC,Xn) 111 011
([bd,An,Xn],od) 110 reg. number:An ([bd,PC,Xn],od) 111 011
([bd,An],Xn,od) 110 reg. number:An ([bd,PC],Xn,od) 111 011
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