Chapter 26. M680x0 Dependent Features
155
26.3. Motorola Syntax
The standard Motorola syntax for this chip differs from the syntax already discussed (Section 26.2
Syntax).
as
can accept Motorola syntax for operands, even if mit syntax is used for other operands in
the same instruction. The two kinds of syntax are fully compatible.
In the following table
apc
stands for any of the address registers (
%a0
through
%a7
), the program
counter (
%pc
), the zero address relative to the program counter (
%zpc
), or a suppressed address reg 
ister (
%za0
through
%za7
). The use of
size
means one of
w
or
l
, and it may always be omitted along
with the leading dot. The use of
scale
means one of
1
,
2
,
4
, or
8
, and it may always be omitted along
with the leading asterisk.
The following additional addressing modes are understood:
Address Register Indirect
(%a0)
through
(%a7) %a7
is also known as
%sp
, i.e. the Stack Pointer.
%a6
is also known as
%fp
, the Frame Pointer.
Address Register Postincrement
(%a0)+
through
(%a7)+
Address Register Predecrement
 (%a0)
through
 (%a7)
Indirect Plus Offset
number(%a0)
through
number(%a7)
, or
number(%pc)
.
The
number
may also appear within the parentheses, as in
(number,%a0)
. When used with the
pc
, the
number
may be omitted (with an address register, omitting the
number
produces Address
Register Indirect mode).
Index
number(apc,register.size*scale)
The
number
may be omitted, or it may appear within the parentheses. The
apc
may be omitted.
The
register
and the
apc
may appear in either order. If both
apc
and
register
are address
registers, and the
size
and
scale
are omitted, then the first register is taken as the base register,
and the second as the index register.
Postindex
([number,apc],register.size*scale,onumber)
The
onumber
, or the
register
, or both, may be omitted. Either the
number
or the
apc
may be
omitted, but not both.
Preindex
([number,apc,register.size*scale],onumber)
The
number
, or the
apc
, or the
register
, or any two of them, may be omitted. The
onumber
may be omitted. The
register
and the
apc
may appear in either order. If both
apc
and
register
are address registers, and the
size
and
scale
are omitted, then the first register
is taken as the base register, and the second as the index register.






footer




 

 

 

 

 Home | About Us | Network | Services | Support | FAQ | Control Panel | Order Online | Sitemap | Contact

canadian web hosting

 

Our partners: PHP: Hypertext Preprocessor Best Web Hosting Java Web Hosting Inexpensive Web Hosting  Jsp Web Hosting

Cheapest Web Hosting Jsp Hosting Cheap Hosting

Visionwebhosting.net Business web hosting division of Web Design Plus. All rights reserved