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MC68060 Software Package
MOTOROLA
M68060 USER’S MANUAL
C-13
C.3.1 Floating-Point Emulation Results
All numerical results and condition code settings produced by the M68060FPSP and visible
to the user are identical to those produced by the MC68881/882 and MC68040 with the fol-
lowing exception: the M68060FPSP transcendental calculation results are not the same as
for the MC68881/882, because the algorithms used in the MC68881/882 (CORDIC) cannot
be effectively implemented in software. However, the error bound of the M68060FPSP tran-
scendental routines (same as for the MC68040 routines) are equivalent or superior.
For floating-point arithmetic instructions, the error bound is one-half unit in the last place of
the destination format in the round-to-nearest mode, and one unit in the last place in the
Table C-3. Unimplemented Instructions
General Monadic Operations
FACOS FLOGN
FASIN FLOGNP1
FATAN FMOVECR
FATANH FSIN
FCOS FSINCOS
FCOSH FSINH
FETOX FTAN
FETOXM1 FTANH
FGETEXP FTENTOX
FGETMAN FTWOTOX
FLOG10 FLOG2
General Dyadic Operations
FMOD FREM
FSCALE —
Conditionals
FTRAPcc FDBcc
FScc –
Unimplemented Effective Address
FMOVEM.X (dynamic register list) FMOVEM.L #immediate of
2 or 3 control regs
F<op>.X #immediate,FPn F<op>.P #immediate,FPn
Table C-4. Unimplemented Data Formats and Data Types
Data Formats/Data Types SGL DBL EXT DEC Byte Word Long
Normalized S S S U S S S
Zero S S S U S S S
Infinity S S S U
NAN S S S U
Denormalized UUUU—— —
Unnormalized — — U U
Where:
S = Implemented Data Format, handled by the MC68060
U = Unimplemented Data Format, handled by the M68060SP
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