-@c Copyright 2005
-@c Free Software Foundation, Inc.
+@c Copyright (C) 2005-2014 Free Software Foundation, Inc.
@c This is part of the GAS manual.
@c For copying conditions, see the file as.texinfo.
+@c man end
+
@ifset GENERIC
@page
-@node BFIN-Dependent
+@node Blackfin-Dependent
@chapter Blackfin Dependent Features
@end ifset
+
@ifclear GENERIC
@node Machine Dependencies
@chapter Blackfin Dependent Features
@cindex Blackfin support
@menu
-* BFIN Syntax:: BFIN Syntax
-* BFIN Directives:: BFIN Directives
+* Blackfin Options:: Blackfin Options
+* Blackfin Syntax:: Blackfin Syntax
+* Blackfin Directives:: Blackfin Directives
@end menu
-@node BFIN Syntax
+@node Blackfin Options
+@section Options
+@cindex Blackfin options (none)
+@cindex options for Blackfin (none)
+
+@c man begin OPTIONS
+@table @gcctabopt
+
+@cindex @code{-mcpu=} command line option, Blackfin
+@item -mcpu=@var{processor}@r{[}-@var{sirevision}@r{]}
+This option specifies the target processor. The optional @var{sirevision}
+is not used in assembler. It's here such that GCC can easily pass down its
+@code{-mcpu=} option. The assembler will issue an
+error message if an attempt is made to assemble an instruction which
+will not execute on the target processor. The following processor names are
+recognized:
+@code{bf504},
+@code{bf506},
+@code{bf512},
+@code{bf514},
+@code{bf516},
+@code{bf518},
+@code{bf522},
+@code{bf523},
+@code{bf524},
+@code{bf525},
+@code{bf526},
+@code{bf527},
+@code{bf531},
+@code{bf532},
+@code{bf533},
+@code{bf534},
+@code{bf535} (not implemented yet),
+@code{bf536},
+@code{bf537},
+@code{bf538},
+@code{bf539},
+@code{bf542},
+@code{bf542m},
+@code{bf544},
+@code{bf544m},
+@code{bf547},
+@code{bf547m},
+@code{bf548},
+@code{bf548m},
+@code{bf549},
+@code{bf549m},
+@code{bf561},
+and
+@code{bf592}.
+
+@cindex @code{-mfdpic} command line option, Blackfin
+@item -mfdpic
+Assemble for the FDPIC ABI.
+
+@cindex @code{-mno-fdpic} command line option, Blackfin
+@cindex @code{-mnopic} command line option, Blackfin
+@item -mno-fdpic
+@itemx -mnopic
+Disable -mfdpic.
+@end table
+@c man end
+
+@node Blackfin Syntax
@section Syntax
-@cindex BFIN syntax
-@cindex syntax, BFIN
+@cindex Blackfin syntax
+@cindex syntax, Blackfin
@table @code
@item Special Characters
instruction may appear on the same line. White space (space, tab,
comments or newline) may appear anywhere between tokens. A token must
not have embedded spaces. Tokens include numbers, register names,
-keywords, user identifiers, and also some multicharacter special
+keywords, user identifiers, and also some multicharacter special
symbols like "+=", "/*" or "||".
+Comments are introduced by the @samp{#} character and extend to the
+end of the current line. If the @samp{#} appears as the first
+character of a line, the whole line is treated as a comment, but in
+this case the line can also be a logical line number directive
+(@pxref{Comments}) or a preprocessor control command
+(@pxref{Preprocessing}).
+
@item Instruction Delimiting
A semicolon must terminate every instruction. Sometimes a complete
-instruction will consist of more than one operation. There are two
+instruction will consist of more than one operation. There are two
cases where this occurs. The first is when two general operations
are combined. Normally a comma separates the different parts, as in
a0 = r3.h * r2.l || r1 = [p3++] || r4 = [i2++];
@end smallexample
+Multiple instructions can occur on the same line. Each must be
+terminated by a semicolon character.
+
@item Register Names
The assembler treats register names and instruction keywords in a case
Register names are reserved and may not be used as program identifiers.
-Some operations (such as "Move Register") require a register pair.
+Some operations (such as "Move Register") require a register pair.
Register pairs are always data registers and are denoted using a colon,
-eg., R3:2. The larger number must be written firsts. Note that the
+eg., R3:2. The larger number must be written firsts. Note that the
hardware only supports odd-even pairs, eg., R7:6, R5:4, R3:2, and R1:0.
Some instructions (such as --SP (Push Multiple)) require a group of
Again, the larger number appears first.
Portions of a particular register may be individually specified. This
-is written with a dot (".") following the register name and then a
+is written with a dot (".") following the register name and then a
letter denoting the desired portion. For 32-bit registers, ".H"
denotes the most significant ("High") portion. ".L" denotes the
least-significant portion. The subdivisions of the 40-bit registers
@item Data Registers
The set of 32-bit registers (R0, R1, R2, R3, R4, R5, R6 and R7) that
-normally contain data for manipulation. These are abbreviated as
+normally contain data for manipulation. These are abbreviated as
D-register or Dreg. Data registers can be accessed as 32-bit registers
or as two independent 16-bit registers. The least significant 16 bits
-of each register is called the "low" half and is desginated with ".L"
+of each register is called the "low" half and is designated with ".L"
following the register name. The most significant 16 bits are called
-the "high" half and is designated with ".H". following the name.
+the "high" half and is designated with ".H" following the name.
@smallexample
R7.L, r2.h, r4.L, R0.H
@item Modify Registers
The set of 32-bit registers (M0, M1, M2, M3) that normally contain
-offset values that are added and subracted to one of the index
+offset values that are added and subtracted to one of the index
registers. Abbreviated as Mreg.
@item Length Registers
@end table
-@node BFIN Directives
+@node Blackfin Directives
@section Directives
-@cindex BFIN directives
-@cindex directives, BFIN
+@cindex Blackfin directives
+@cindex directives, Blackfin
The following directives are provided for compatibility with the VDSP assembler.
@table @code
@item .byte2
-Initializes a four byte data object.
-@item .byte4
Initializes a two byte data object.
+
+This maps to the @code{.short} directive.
+@item .byte4
+Initializes a four byte data object.
+
+This maps to the @code{.int} directive.
@item .db
-TBD
-@item .dd
-TBD
+Initializes a single byte data object.
+
+This directive is a synonym for @code{.byte}.
@item .dw
-TBD
+Initializes a two byte data object.
+
+This directive is a synonym for @code{.byte2}.
+@item .dd
+Initializes a four byte data object.
+
+This directive is a synonym for @code{.byte4}.
@item .var
Define and initialize a 32 bit data object.
@end table
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