From 95074dc36212e0530c4fa41b8b57fe308affb353 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Mon, 21 Aug 1995 18:37:10 +0000 Subject: * doc/as.texinfo: Document irp, irpc, macro, and rept. MRI mode now supports macros, ifc, ifnc, irp, irpc, rept, and endr, without using gasp. --- gas/ChangeLog | 4 ++ gas/doc/as.texinfo | 190 +++++++++++++++++++++++++++++++++++++++++++++++++---- 2 files changed, 181 insertions(+), 13 deletions(-) (limited to 'gas') diff --git a/gas/ChangeLog b/gas/ChangeLog index 3a44e5c..780d2a3 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,5 +1,9 @@ Mon Aug 21 13:57:20 1995 Ian Lance Taylor + * doc/as.texinfo: Document irp, irpc, macro, and rept. MRI mode + now supports macros, ifc, ifnc, irp, irpc, rept, and endr, without + using gasp. + Add support for macros. * as.c: Include sb.h and macro.h. (max_macro_next): New global variable. diff --git a/gas/doc/as.texinfo b/gas/doc/as.texinfo index bdd9af9..44b8842 100644 --- a/gas/doc/as.texinfo +++ b/gas/doc/as.texinfo @@ -1084,19 +1084,6 @@ The @code{OPT} @code{D} option is the default, unlike the MRI assembler. The @code{XREF} pseudo-op is ignored. -@item macros - -Macros are not supported directly, but are supported by @code{gasp}. - -@item @code{IFC}, @code{IFNC} pseudo-ops. - -The @code{IFC} and @code{IFNC} pseudo-ops are not supported directly, but are -supported by @code{gasp}. - -@item @code{IRP}, @code{IRPC}, @code{REPT}, @code{ENDR} pseudo-ops - -The repeating pseudo-ops are not supported directly, but are supported by -@code{gasp}. @end itemize @node o @@ -2882,6 +2869,8 @@ Some machine configurations provide additional directives. * If:: @code{.if @var{absolute expression}} * Include:: @code{.include "@var{file}"} * Int:: @code{.int @var{expressions}} +* Irp:: @code{.irp @var{symbol},@var{values}}@dots{} +* Irpc:: @code{.irpc @var{symbol},@var{values}}@dots{} * Lcomm:: @code{.lcomm @var{symbol} , @var{length}} * Lflags:: @code{.lflags} @ifclear no-line-dir @@ -2895,12 +2884,15 @@ Some machine configurations provide additional directives. * Lsym:: @code{.lsym @var{symbol}, @var{expression}} @end ignore +* Macro:: @code{.macro @var{name} @var{args}}@dots{} + * Nolist:: @code{.nolist} * Octa:: @code{.octa @var{bignums}} * Org:: @code{.org @var{new-lc} , @var{fill}} * P2align:: @code{.p2align @var{abs-expr} , @var{abs-expr}} * Psize:: @code{.psize @var{lines}, @var{columns}} * Quad:: @code{.quad @var{bignums}} +* Rept:: @code{.rept @var{count}} * Sbttl:: @code{.sbttl "@var{subheading}"} @ifset COFF * Scl:: @code{.scl @var{class}} @@ -3407,6 +3399,62 @@ integers. On the H8/300H and the Hitachi SH, however, @code{.int} emits @end ifset @end ifclear +@node Irp +@section @code{.irp @var{symbol},@var{values}}@dots{} + +@cindex @code{irp} directive +Evaluate a sequence of statements assigning different values to @var{symbol}. +The sequence of statements starts at the @code{.irp} directive, and is +terminated by an @code{.endr} directive. For each @var{value}, @var{symbol} is +set to @var{value}, and the sequence of statements is assembled. If no +@var{value} is listed, the sequence of statements is assembled once, with +@var{symbol} set to the null string. To refer to @var{symbol} within the +sequence of statements, use @var{\symbol}. + +For example, assembling + +@example + .irp param,1,2,3 + move d\param,sp@@- + .endr +@end example + +is equivalent to assembling + +@example + move d1,sp@@- + move d2,sp@@- + move d3,sp@@- +@end example + +@node Irpc +@section @code{.irpc @var{symbol},@var{values}}@dots{} + +@cindex @code{irpc} directive +Evaluate a sequence of statements assigning different values to @var{symbol}. +The sequence of statements starts at the @code{.irpc} directive, and is +terminated by an @code{.endr} directive. For each character in @var{value}, +@var{symbol} is set to the character, and the sequence of statements is +assembled. If no @var{value} is listed, the sequence of statements is +assembled once, with @var{symbol} set to the null string. To refer to +@var{symbol} within the sequence of statements, use @var{\symbol}. + +For example, assembling + +@example + .irpc param,123 + move d\param,sp@@- + .endr +@end example + +is equivalent to assembling + +@example + move d1,sp@@- + move d2,sp@@- + move d3,sp@@- +@end example + @node Lcomm @section @code{.lcomm @var{symbol} , @var{length}} @@ -3536,6 +3584,99 @@ the same as the expression value: The new symbol is not flagged as external. @end ignore +@node Macro +@section @code{.macro} + +@cindex macros +The commands @code{.macro} and @code{.endm} allow you to define macros that +generate assembly output. For example, this definition specifies a macro +@code{sum} that puts a sequence of numbers into memory: + +@example + .macro sum from=0, to=5 + .long \from + .if \to-\from + sum "(\from+1)",\to + .endif + .endm +@end example + +@noindent +With that definition, @samp{SUM 0,5} is equivalent to this assembly input: + +@example + .long 0 + .long 1 + .long 2 + .long 3 + .long 4 + .long 5 +@end example + +@ftable @code +@item .macro @var{macname} +@itemx .macro @var{macname} @var{macargs} @dots{} +@cindex @code{macro} directive +Begin the definition of a macro called @var{macname}. If your macro +definition requires arguments, specify their names after the macro name, +separated by commas or spaces. You can supply a default value for any +macro argument by following the name with @samp{=@var{deflt}}. For +example, these are all valid @code{.macro} statements: + +@table @code +@item .macro comm +Begin the definition of a macro called @code{comm}, which takes no +arguments. + +@item .macro plus1 p, p1 +@itemx .macro plus1 p p1 +Either statement begins the definition of a macro called @code{plus1}, +which takes two arguments; within the macro definition, write +@samp{\p} or @samp{\p1} to evaluate the arguments. + +@item .macro reserve_str p1=0 p2 +Begin the definition of a macro called @code{reserve_str}, with two +arguments. The first argument has a default value, but not the second. +After the definition is complete, you can call the macro either as +@samp{reserve_str @var{a},@var{b}} (with @samp{\p1} evaluating to +@var{a} and @samp{\p2} evaluating to @var{b}), or as @samp{reserve_str +,@var{b}} (with @samp{\p1} evaluating as the default, in this case +@samp{0}, and @samp{\p2} evaluating to @var{b}). +@end table + +When you call a macro, you can specify the argument values either by +position, or by keyword. For example, @samp{sum 9,17} is equivalent to +@samp{sum to=17, from=9}. + +@item .endm +@cindex @code{endm} directive +Mark the end of a macro definition. + +@item .exitm +@cindex @code{exitm} directive +Exit early from the current macro definition. + +@cindex number of macros executed +@cindex macros, count executed +@item \@@ +@code{@value{AS}} maintains a counter of how many macros it has +executed in this pseudo-variable; you can copy that number to your +output with @samp{\@@}, but @emph{only within a macro definition}. + +@ignore +@item LOCAL @var{name} [ , @dots{} ] +@emph{Warning: @code{LOCAL} is only available if you select ``alternate +macro syntax'' with @samp{-a} or @samp{--alternate}.} @xref{Alternate,, +Alternate macro syntax}. + +Generate a string replacement for each of the @var{name} arguments, and +replace any instances of @var{name} in each macro expansion. The +replacement string is unique in the assembly, and different for each +separate macro expansion. @code{LOCAL} allows you to write macros that +define symbols, without fear of conflict between separate macro expansions. +@end ignore +@end ftable + @node Nolist @section @code{.nolist} @@ -3654,6 +3795,29 @@ warning message; and just takes the lowest order 16 bytes of the bignum. @cindex integer, 16-byte @end ifset +@node Rept +@section @code{.rept @var{count}} + +@cindex @code{rept} directive +Repeat the sequence of lines between the @code{.rept} directive and the next +@code{.endr} directive @var{count} times. + +For example, assembling + +@example + .rept 3 + .long 0 + .endr +@end example + +is equivalent to assembling + +@example + .long 0 + .long 0 + .long 0 +@end example + @node Sbttl @section @code{.sbttl "@var{subheading}"} -- cgit v1.1