-@c Copyright 2002
+@c Copyright 2002, 2003, 2005
@c Free Software Foundation, Inc.
@c Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
@c This is part of the GAS manual.
This option instructs the assembler to mark the resulting object file
as using the ``constant GP without function descriptor'' data model.
This model is like the ``constant GP'' model, except that it
-additionaly does away with function descriptors. What this means is
+additionally does away with function descriptors. What this means is
that the address of a function refers directly to the function's code
entry-point. Normally, such an address would refer to a function
descriptor, which contains both the code entry-point and the GP-value
turn on the EF_IA_64_NOFUNCDESC_CONS_GP flag in the ELF file header.
@item -milp32
-@item -milp64
-@item -mlp64
-@item -mp64
+@itemx -milp64
+@itemx -mlp64
+@itemx -mp64
These options select the data model. The assembler defaults to @code{-mlp64}
(LP64 data model).
@item -mle
-@item -mbe
+@itemx -mbe
These options select the byte order. The @code{-mle} option selects little-endian
byte order (default) and @code{-mbe} selects big-endian byte order. Note that
IA-64 machine code always uses little-endian byte order.
+@item -mtune=itanium1
+@itemx -mtune=itanium2
+Tune for a particular IA-64 CPU, @var{itanium1} or @var{itanium2}. The
+default is @var{itanium2}.
+
+@item -munwind-check=warning
+@itemx -munwind-check=error
+These options control what the assembler will do when performing
+consistency checks on unwind directives. @code{-munwind-check=warning}
+will make the assembler issue a warning when an unwind directive check
+fails. This is the default. @code{-munwind-check=error} will make the
+assembler issue an error when an unwind directive check fails.
+
+@item -mhint.b=ok
+@itemx -mhint.b=warning
+@itemx -mhint.b=error
+These options control what the assembler will do when the @samp{hint.b}
+instruction is used. @code{-mhint.b=ok} will make the assembler accept
+@samp{hint.b}. @code{-mint.b=warning} will make the assembler issue a
+warning when @samp{hint.b} is used. @code{-mhint.b=error} will make
+the assembler treat @samp{hint.b} as an error, which is the default.
+
@item -x
-@item -xexplicit
-These options turn on dependency violation checking. This checking is turned on by
-default.
+@itemx -xexplicit
+These options turn on dependency violation checking.
@item -xauto
This option instructs the assembler to automatically insert stop bits where necessary
-to remove dependency violations.
+to remove dependency violations. This is the default mode.
+
+@item -xnone
+This option turns off dependency violation checking.
@item -xdebug
This turns on debug output intended to help tracking down bugs in the dependency
violation checker.
+@item -xdebugn
+This is a shortcut for -xnone -xdebug.
+
+@item -xdebugx
+This is a shortcut for -xexplicit -xdebug.
+
@end table
@cindex IA-64 Syntax
@cindex IA-64 registers
@cindex register names, IA-64
-The 128 integer registers are refered to as @samp{r@var{n}}.
-The 128 floating-point registers are refered to as @samp{f@var{n}}.
-The 128 application registers are refered to as @samp{ar@var{n}}.
-The 128 control registers are refered to as @samp{cr@var{n}}.
-The 64 one-bit predicate registers are refered to as @samp{p@var{n}}.
-The 8 branch registers are refered to as @samp{b@var{n}}.
+The 128 integer registers are referred to as @samp{r@var{n}}.
+The 128 floating-point registers are referred to as @samp{f@var{n}}.
+The 128 application registers are referred to as @samp{ar@var{n}}.
+The 128 control registers are referred to as @samp{cr@var{n}}.
+The 64 one-bit predicate registers are referred to as @samp{p@var{n}}.
+The 8 branch registers are referred to as @samp{b@var{n}}.
In addition, the assembler defines a number of aliases:
@samp{gp} (@samp{r1}), @samp{sp} (@samp{r12}), @samp{rp} (@samp{b0}),
@samp{ret0} (@samp{r8}), @samp{ret1} (@samp{r9}), @samp{ret2} (@samp{r10}),
The assembler defines bit masks for each of the bits in the IA-64
processor status register. For example, @samp{psr.ic} corresponds to
a value of 0x2000. These masks are primarily intended for use with
-the @sample{ssm}/@sample{sum} and @sample{rsm}/@sample{rum}
+the @samp{ssm}/@samp{sum} and @samp{rsm}/@samp{rum}
instructions, but they can be used anywhere else where an integer
constant is expected.
+@node IA-64-Relocs
+@subsection Relocations
+@cindex IA-64 relocations
+
+In addition to the standard IA-64 relocations, the following relocations are
+implemented by @code{@value{AS}}:
+
+@table @code
+@item @@slotcount(@var{V})
+Convert the address offset @var{V} into a slot count. This pseudo
+function is available only on VMS. The expression @var{V} must be
+known at assembly time: it can't reference undefined symbols or symbols in
+different sections.
+@end table
+
@node IA-64 Opcodes
@section Opcodes
For detailed information on the IA-64 machine instruction set, see the
projects / external / binutils.git / blobdiff