config.gcc: Add cris-*-aout, cris-*-elf, cris-*-none, cris-*-linux* cases.

	* config.gcc: Add cris-*-aout, cris-*-elf, cris-*-none,
	cris-*-linux* cases.
	* config/cris/cris-protos.h: New file.
	* config/cris/cris.c: New file.
	* config/cris/cris.h: New file.
	* config/cris/cris.md: New file.
	* config/cris/linux.h: New file.
	* config/cris/aout.h: New file.
	* config/cris/arit.c: New file.
	* config/cris/cris_abi_symbol.c: New file.
	* config/cris/mulsi3.asm: New file.
	* config/cris/t-aout: New file.
	* config/cris/t-cris: New file.
	* config/cris/t-elfmulti: New file.
	* config/cris/t-linux: New file.
	* doc/invoke.texi: Add CRIS options.
	* doc/install.texi (Specific): Add blurb for CRIS.

From-SVN: r46191

2 files changed, 186 insertions, 0 deletions

diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index 90cc3011cac..b4fbbae4c07 100644
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -1787,6 +1787,45 @@ can also be obtained from:
 </p>
 <hr>
 @end html
+@heading @anchor{cris}CRIS
+
+CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
+series.  These are used in embedded applications.
+
+@ifnothtml
+@xref{CRIS Options,, CRIS Options, gcc, Using and Porting the GNU Compiler
+Collection (GCC)},
+@end ifnothtml
+@ifhtml
+See ``CRIS Options'' in the main manual
+@end ifhtml
+for a list of CRIS-specific options.
+
+There are a few different CRIS targets:
+@table @code
+@item cris-axis-aout
+Old target.  Includes a multilib for the @samp{elinux} a.out-based
+target.  No multilibs for newer architecture variants.
+@item cris-axis-elf
+Mainly for monolithic embedded systems.  Includes a multilib for the
+@samp{v10} core used in @samp{ETRAX 100 LX}.
+@item cris-axis-linux-gnu
+A GNU/Linux port for the CRIS architecture, currently targeting
+@samp{ETRAX 100 LX} by default.
+@end table
+
+For @code{cris-axis-aout} and @code{cris-axis-elf} you need binutils 2.11
+or newer.  For @code{cris-axis-linux-gnu} you need binutils 2.12 or newer.
+
+Pre-packaged tools can be obtained from
+@uref{ftp://ftp.axis.com/pub/axis/tools/cris/compiler-kit/}.  More
+information about this platform is available at
+@uref{http://developer.axis.com/}.
+
+@html
+</p>
+<hr>
+@end html
 @heading @anchor{dos}DOS
 
 Please have a look at our @uref{binaries.html,,binaries page}.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 0588c1a5b8f..cab5005f752 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -588,6 +588,15 @@ in the following sections.
 -msmall-exec  -mno-small-exec  -mmvcle -mno-mvcle @gol
 -m64 -m31 -mdebug -mno-debug}
 
+@emph{CRIS Options}
+@gccoptlist{
+-mcpu=@var{cpu} -march=@var{cpu} -mtune=@var{cpu} @gol
+-mmax-stack-frame=@var{n} -melinux-stacksize=@var{n} @gol
+-metrax4 -metrax100 -mpdebug -mcc-init -mno-side-effects @gol
+-mstack-align -mdata-align -mconst-align @gol
+-m32-bit -m16-bit -m8-bit -mno-prologue-epilogue -mno-gotplt @gol
+-melf -maout -melinux -mlinux -sim -sim2}
+
 @item Code Generation Options
 @xref{Code Gen Options,,Options for Code Generation Conventions}.
 @gccoptlist{
@@ -5096,6 +5105,7 @@ that macro, which enables you to change the defaults.
 * IA-64 Options::
 * D30V Options::
 * S/390 and zSeries Options::
+* CRIS Options::
 @end menu
 
 @node M680x0 Options
@@ -9464,6 +9474,143 @@ The default is to not print debug information.
 
 @end table
 
+@node CRIS Options
+@subsection CRIS Options
+@cindex CRIS Options
+
+These options are defined specifically for the CRIS ports.
+
+@table @gcctabopt
+@item -march=@var{architecture-type}
+@itemx -mcpu=@var{architecture-type}
+@opindex march
+@opindex mcpu
+Generate code for the specified architecture.  The choices for
+@var{architecture-type} are @samp{v3}, @samp{v8} and @samp{v10} for
+respectively ETRAX@w{ }4, ETRAX@w{ }100, and ETRAX@w{ }100@w{ }LX.
+Default is @samp{v0} except for cris-axis-linux-gnu, where the default is
+@samp{v10}.
+
+@item -mtune=@var{architecture-type}
+@opindex mtune
+Tune to @var{architecture-type} everything applicable about the generated
+code, except for the ABI and the set of available instructions.  The
+choices for @var{architecture-type} are the same as for
+@option{-march=@var{architecture-type}}.
+
+@item -mmax-stack-frame=@var{n}
+@opindex mmax-stack-frame
+Warn when the stack frame of a function exceeds @var{n} bytes.
+
+@item -melinux-stacksize=@var{n}
+@opindex melinux-stacksize
+Only available with the @samp{cris-axis-aout} target.  Arranges for
+indications in the program to the kernel loader that the stack of the
+program should be set to @var{n} bytes.
+
+@item -metrax4
+@itemx -metrax100
+@opindex metrax4
+@opindex metrax100
+The options @option{-metrax4} and @option{-metrax100} are synonyms for
+@option{-march=v3} and @option{-march=v8} respectively.
+
+@item -mpdebug
+@opindex mpdebug
+Enable CRIS-specific verbose debug-related information in the assembly
+code.  This option also has the effect to turn off the @samp{#NO_APP}
+formatted-code indicator to the assembler at the beginning of the
+assembly file.
+
+@item -mcc-init
+@opindex mcc-init
+Do not use condition-code results from previous instruction; always emit
+compare and test instructions before use of condition codes.
+
+@item -mno-side-effects
+@opindex mno-side-effects
+Do not emit instructions with side-effects in addressing modes other than
+post-increment.
+
+@item -mstack-align
+@itemx -mno-stack-align
+@itemx -mdata-align
+@itemx -mno-data-align
+@itemx -mconst-align
+@itemx -mno-const-align
+@opindex mstack-align
+@opindex mno-stack-align
+@opindex mdata-align
+@opindex mno-data-align
+@opindex mconst-align
+@opindex mno-const-align
+These options (no-options) arranges (eliminate arrangements) for the
+stack-frame, individual data and constants to be aligned for the maximum
+single data access size for the chosen CPU model.  The default is to
+arrange for 32-bit alignment.  ABI details such as structure layout are
+not affected by these options.
+
+@item -m32-bit
+@itemx -m16-bit
+@itemx -m8-bit
+@opindex m32-bit
+@opindex m16-bit
+@opindex m8-bit
+Similar to the stack- data- and const-align options above, these options
+arrange for stack-frame, writable data and constants to all be 32-bit,
+16-bit or 8-bit aligned.  The default is 32-bit alignment.
+
+@item -mno-prologue-epilogue
+@itemx -mprologue-epilogue
+@opindex mno-prologue-epilogue
+@opindex mprologue-epilogue
+With @option{-mno-prologue-epilogue}, the normal function prologue and
+epilogue that sets up the stack-frame are omitted and no return
+instructions or return sequences are generated in the code.  Use this
+option only together with visual inspection of the compiled code: no
+warnings or errors are generated when call-saved registers must be saved,
+or storage for local variable needs to be allocated.
+
+@item -mno-gotplt
+@itemx -mgotplt
+@opindex mno-gotplt
+@opindex mgotplt
+With @option{-fpic} and @option{-fPIC}, don't generate (do generate)
+instruction sequences that load addresses for functions from the PLT part
+of the GOT rather than (traditional on other architectures) calls to the
+PLT.  The default is @option{-mgotplt}.
+
+@item -maout
+@opindex maout
+Legacy no-op option only recognized with the cris-axis-aout target.
+
+@item -melf
+@opindex melf
+Legacy no-op option only recognized with the cris-axis-elf and
+cris-axis-linux-gnu targets.
+
+@item -melinux
+@opindex melinux
+Only recognized with the cris-axis-aout target, where it selects a
+GNU/linux-like multilib, include files and instruction set for
+@option{-march=v8}.
+
+@item -mlinux
+@opindex mlinux
+Legacy no-op option only recognized with the cris-axis-linux-gnu target.
+
+@item -sim
+@opindex sim
+This option, recognized for the cris-axis-aout and cris-axis-elf arranges
+to link with input-output functions from a simulator library.  Code,
+initialized data and zero-initialized data are allocated consecutively.
+
+@item -sim2
+@opindex sim2
+Like @option{-sim}, but pass linker options to locate initialized data at
+0x40000000 and zero-initialized data at 0x80000000.
+@end table
+
 
 @node Code Gen Options
 @section Options for Code Generation Conventions