Motorola CPU32 Reference Manual page 215

III
TBLS
TBLSN
Table Lookup and Interpolate (Signed)
Data Register Interpolate:
14 13 12 10 9
8
7
6 5
Instruction Fields:
Effective address field (table lookup and interpolate mode only):
4
3
TBLS
TBLSN
2 0
REGISTER Oym
REGISTER Dyn
Specifies the source location. Only control addressing modes are allowed as shown:
Addressing Mode Mode Register
On
- -
An
-
-
(An) 010
Reg. number: An
(An) +
- -
-(An)
-
-
(d16, An)
101 Reg. number: An
(dS,
An, Xn) 110
Reg. number: An
(bd, An, Xn) 110 Reg. number: An
Size field:
Specifies the size of operation.
00 - byte operation
01 - word operation
10 - long operation
Register field:
Addressing Mode Mode Register
(xxx).W 111 000
(xxx).L
111
001
#(data)
-
-
(d16, PC) 111 010
(dS, PC, Xn)
111
011
(bd, PC, Xn) 111
011
Specifies the destination data register, Ox. On entry, the register contains the interpolation
fraction and entry number.
Oym, Dyn field:
If the effective address mode field is nonzero, this operand register is unused and should
be zero. If the effective address mode field is zero, the surface interpolation variant of this
instruction is implied, and Dyn specifies one of the two source operands.
Rounding mode field:
MOTOROLA
4-162
The 'R' bit controls rounding of the final result. When R
=
0, the result is rounded according
to the round-to-nearest algorithm. When R
=
1, the result is returned unrounded.
INSTRUCTION SET
CPU32 REFERENCE MANUAL