Patch in the bottom adds support of IA MCU psABI to libgcc (enables
soft-fp) and libdecnumber (enables it for IA MCU).
config/
* dfp.m4 (enable_decimal_float): Also set to yes for
i?86*-*-elfiamcu target.
gcc/
* configure: Regenerated.
libdecnumber/
* configure: Regenerated.
libgcc/
* config.host: Support i[34567]86-*-elfiamcu target.
* config/t-softfp-sfdftf: New file.
* config/i386/32/t-iamcu: Likewise.
* configure: Regenerated.
From-SVN: r225198
We shouldn't call external function, __cpu_indicator_init, while an object
is being relocated since its .got.plt section hasn't been updated. It
works for non-PIE since no update on .got.plt section is required. This
patch creates libgcc.so as a linker script, hides __cpu_indicator_init
and __cpu_model in libgcc.so.1 from linker, forces linker to resolve
__cpu_indicator_init and __cpu_model to their hidden definitions in
libgcc.a while providing backward binary compatibility.
gcc/testsuite/
PR target/65612
* g++.dg/ext/mv18.C: New test.
* g++.dg/ext/mv19.C: Likewise.
* g++.dg/ext/mv20.C: Likewise.
* g++.dg/ext/mv21.C: Likewise.
* g++.dg/ext/mv22.C: Likewise.
* g++.dg/ext/mv23.C: Likewise.
libgcc/
PR target/65612
* config.host (tmake_file): Add t-slibgcc-libgcc for Linux/x86.
* config/i386/cpuinfo.c (__cpu_model): Initialize.
(__cpu_indicator_init@GCC_4.8.0): New.
(__cpu_model@GCC_4.8.0): Likewise.
* config/i386/t-linux (HOST_LIBGCC2_CFLAGS): Add
-DUSE_ELF_SYMVER.
From-SVN: r222178
* gcc/config/i386/cygwin.h (STARTFILE_SPEC): Add vtv_start.o,
if -fvtable-verify=preinit/std is used.
* gcc/config/i386/mingw-w64.h (STARTFILE_SPEC): Likewise.
* gcc/config/i386/mingw32.h (STARTFILE_SPEC): Likewise.
* gcc/config/i386/cygwin.h (ENDFILE_SPEC): Add vtv_end.o,
if -fvtable-verify=preinit/std is used.
* gcc/config/i386/mingw32.h (ENDFILE_SPEC): Likewise.
* gcc/config/i386/cygwin.h (LIB_SPEC): Pass -lvtv and -lpsapi,
if -fvtable-verify=preinit/std is used.
* gcc/config/i386/mingw-w64.h (LIB_SPEC): Likewise.
* gcc/config/i386/mingw32.h (LIB_SPEC): Likewise.
* gcc/cp/vtable-class-hierarchy.c (vtv_generate_init_routine): Add
check for not TARGET_PECOFF at the VTV_PREINIT_PRIORITY checks.
* gcc/varasm.c (assemble_variable): Add code to properly set the comdat
section and name for the .vtable_map_vars section in case the
target is PE or COFF.
* libgcc/Makefile.in: Move rules to build vtv_*.o out of the check
for CUSTOM_CRTSTUFF.
* libgcc/config.host (i[34567]86-*-cygwin*, x86_64-*-cygwin*, i[34567]86-*-mingw*)
(x86_64-*-mingw*): Only add vtv_*.o to extra_parts if enable_vtable_verify.
* libstdc++-v3/acinclude.m4: Define VTV_CYGMIN.
* libstdc++-v3/configure: Regenerate.
* libstdc++-v3/libsupc++/Makefile.am: Add vtv_sources only to
libsupc___la_SOURCES and libsupc__convenience_la_SOURCES if VTV_CYGMIN is
not set.
* libstdc++-v3/libsupc++/Makefile.in: Regenerated.
* libstdc++-v3/libsupc++/vtv_stubs.cc: Add none weak declaration of every
function for Cygwin and MinGW.
* libstdc++-v3/src/Makefile.am: Add libvtv.la to toolexeclib_LTLIBRARIES,
if VTV_CYGMIN is set. Define libvtv_la_SOURCES, libvtv_la_LDFLAGS,
libvtv_la_AM_CXXFLAGS and libvtv_la_LINK if VTV_CYGMIN is set.
* libstdc++-v3/src/Makefile.in: Regenerate.
* libvtv/Makefile.am : Add libvtv.la to toolexeclib_LTLIBRARIES, if VTV_CYGMIN
is set. Define libvtv_la_LIBADD, libvtv_la_LDFLAGS, libvtv_stubs_la_LDFLAGS
and libvtv_stubs_la_SOURCES if VTV_CYGMIN is set. Add obstac.c to
libvtv_la_SOURCES if VTV_CYGMIN is set.
* libvtv/Makefile.in : Regenerate.
* libvtv/aclocal.m4 : Regenerate.
* libvtv/configure : Regenerate.
* libvtv/configure.ac : Add ACX_LT_HOST_FLAGS. Define VTV_CYGMIN.
* libvtv/configure.tgt : (x86_64-*-cygwin*, i?86-*-cygwin*, x86_64-*-mingw*)
(i?86-*-mingw*): Add to supported targets.
* libvtv/vtv_fail.cc : Skip inclusion of execinfo.h on Cygwin and MinGW.
(log_error_message): Skip calls to backtrace and backtrace_symbols_fd on Cygwin
and MinGW.
* libvtv/vtv_malloc.cc : Include windows.h and skip sys/mman.h inclusion on
Cygwin and MinGW. Add sysconf port on Cygwin and MinGW.
(obstack_chunk_alloc): Exchange call to mmap with call to VirtualAlloc on Cygwin
and MinGW.
(__vtv_malloc_init): Exchange call to sysconf with call to port of sysconf on
Cygwin and MinGW.
* libvtv/vtv_malloc.h : Declare mprotect and define PROT_READ and PROT_WRITE on
Cygwin and MinGW.
* libvtv/map.h : Include stdint.h on MinGW.
* libvtv/rts.cc : Include windows.h, winternl.h and psapi.h, skip include of
execinfo.h, sys/mman.h and link.h on Cygwin and MinGW.
Add port of __fortify_fail on Cygwin and MinGW.
Change ElfW (Addr) to uintptr_t on Cygwin and MinGW.
(read_section_offset_and_length): Add port for Cygwin and MinGW
(iterate_modules): New function.
(vtv_unprotect_vtable_vars): Use iterate_modules instead of dl_iterate_phdr on
Cygwin and MinGW.
(vtv_protect_vtable_vars): Likewise.
(count_all_pages): Likewise.
(dl_iterate_phdr_count_pages): Don't build on Cygwin and MinGW.
* libvtv/utils.cc : Include windows.h and skip execinfo.h inclusion on
Cygwin and MinGW.
(__vtv_open_log): Exchange call to getuid and getpid with GetCurrentProcessId and
adjust call to snprintf accordingly on Cygwin and MinGW.
Adjust calls to mkdir on MinGW.
Adjust call to open on Cygwin and MinGW.
(__vtv_add_to_log): Adjust call to snprintf on Cygwin and MinGW.
(__vtv_log_verification_failure): Don't generate a backtrace on Cygwin and MinGW.
From-SVN: r220232
Continuing preparations for implementing
TARGET_ATOMIC_ASSIGN_EXPAND_FENV for powerpc*-*-linux* soft-float and
e500, this patch makes soft-fp symbols used for those targets into
compat symbols when building with glibc >= 2.19, so that they are only
in shared libgcc for existing binaries requiring them, not in static
libgcc and not available for new links using shared libgcc. Instead,
new links will get the symbols from libc, which has exported all of
them since 2.19. (Actually all the symbols were exported from glibc
since 2.4, but some of them were exported by glibc as compat symbols
only - because of a confusion between deliberately present soft-fp
symbols and old accidental reexports of libgcc functions from glibc
2.0 - until 2.19.)
This allows user floating-point arithmetic to interoperate properly
with the state handled by <fenv.h> functions, whether software state
(for soft-float; TLS variables that don't form a public part of
glibc's ABI, so can only be accessed directly by functions within
glibc) or hardware state (for e500 - the copies of the soft-fp
functions in glibc being built to interoperate with the hardware state
whereas those in libgcc aren't). Previously only glibc's own
functions, and those operations done in hardware on e500, properly
worked with that state, not direct floating-point arithmetic
operations that were implemented in software.
The intended next step is the actual TARGET_ATOMIC_ASSIGN_EXPAND_FENV
implementation.
The test of glibc >= 2.19 uses the same --with-glibc-version configure
option as in the gcc/ directory (but differently implemented; in gcc/
the fallback is to examine headers to find the version, while in
libgcc/ we can use compile for the target and so use AC_COMPUTE_INT).
The TARGET_ATOMIC_ASSIGN_EXPAND_FENV implementation will also only do
anything for glibc >= 2.19, as it will depend on generating calls to
functions __atomic_feholdexcept __atomic_feclearexcept
__atomic_feupdateenv that were added in 2.19 for that purpose (even
for e500, inline code is not readily possible because of the need to
make prctl syscalls from the implementation of these functions).
In order to make symbols compat symbols, the soft-fp files need
wrapping with generated wrappers including asm .symver directives,
which need to name the symbol version in question. This is extracted
by an awk script from an intermediate stage of generating the .map
file for linking libgcc (that .map itself depends on the objects that
go into the library, so can't be used for this purpose as that would
mean a circular dependency); the extraction is not fully general
regarding the features available in .map generation, but suffices for
the present purpose.
It would make sense for hardfp.c symbols to be compat symbols as well
(in the cases where hardfp.c gets used, the functions in question
should not be used for new links), but this isn't required for the
present purpose, which is only concerned with ensuring that where
functions that should be affected by rounding modes or exceptions get
used, those functions are actually affected by those rounding modes or
exceptions.
Tested with no regressions with cross to powerpc-linux-gnu
(soft-float); c11-atomic-exec-5.c moves from UNSUPPORTED to FAIL, as
expected, now that floating-point arithmetic in user programs uses the
same state as <fenv.h> functions, so the fenv_exceptions test passes,
but TARGET_ATOMIC_ASSIGN_EXPAND_FENV isn't yet implemented. (For
e500, c11-atomic-exec-5.c was already FAILing, as enough operations
worked with the hardware state for the fenv_exceptions effective
target test to pass.) Also verified that the exported symbols and
versions are unchanged, with the expected symbols becoming compat
symbols at the same versions, and that with --with-glibc-version=2.18
the symbols remain normal rather than compat symbols.
* Makefile.in (libgcc.map.in): New target.
(libgcc.map): Use libgcc.map.in.
* config/t-softfp (softfp_compat): New variable to be set by
users.
[$(softfp_compat) = y] (softfp_map_dep, softfp_set_symver): New
variables.
[$(softfp_compat) = y] (softfp_file_list): Use files in the build
directory.
[$(softfp_compat) = y] ($(softfp_file_list)): Generate wrappers
that use compat symbols and disable all code unless [SHARED].
* config/t-softfp-compat: New file.
* find-symver.awk: New file.
* configure.ac (--with-glibc-version): New configure option.
(ppc_fp_compat): New variable set for powerpc*-*-linux*.
* configure: Regenerate.
* config.host (powerpc*-*-linux*): Use ${ppc_fp_compat} for
soft-float and e500.
From-SVN: r216942
Continuing the cleanups of libgcc soft-fp configuration for
powerpc*-*-linux* in preparation for implementing
TARGET_ATOMIC_ASSIGN_EXPAND_FENV for soft-float and e500, this patch
optimizes the choice of which functions to build for the e500 cases.
For e500v2, use of hardfp is generally right, except that calls to
__unordsf2 and __unorddf2 are actually generated by GCC from
__builtin_isunordered and so they need to be implemented with soft-fp
to avoid recursively calling themselves. For e500v1, hardfp is right
for SFmode (except for __unordsf2) but soft-fp for DFmode (and when
using soft-fp, as usual it's best for the conversions between DFmode
and integers all to come directly from soft-fp rather than some coming
from libgcc2.c). Thus, new variables hardfp_exclusions and
softfp_extras are added that configurations using t-hardfp and
t-softfp can use to achieve the desired effect of selectively mixing
the two sources of functions.
Tested with no regressions for crosses to powerpc-linux-gnuspe (both
e500v1 and e500v2); also checked that the same set of symbols and
versions is exported from shared libgcc before and after the patch.
* config/t-hardfp (hardfp_exclusions): Document new variable for
user to define.
(hardfp_func_list): Exclude functions from $(hardfp_exclusions).
* config/t-softfp (softfp_extras): Document new variable for user
to define.
(softfp_func_list): Add functions from $(softfp_extras).
* config/rs6000/t-e500v1-fp, config/rs6000/t-e500v2-fp: New files.
* config.host (powerpc*-*-linux*): For e500v1, use
rs6000/t-e500v1-fp and t-hardfp; do not use t-softfp-sfdf and
t-softfp-excl. For e500v2, use t-hardfp-sfdf, rs6000/t-e500v2-fp
and t-hardfp; do not use t-softfp-sfdf and t-softfp-excl.
From-SVN: r216835
Continuing the cleanups of libgcc soft-fp configuration for
powerpc*-*-linux* in preparation for implementing
TARGET_ATOMIC_ASSIGN_EXPAND_FENV for soft-float and e500, this patch
optimizes the choice of which functions to build for the 32-bit
classic hard-float and soft-float cases. (e500 will be dealt with in
a separate patch which will need to add new features to t-hardfp and
t-softfp; this patch keeps the status quo for e500.)
For hard-float, while the functions in question are part of the libgcc
ABI there is no need for them to contain software floating point code:
no newly built code should use them, and if anything does use them
it's most efficient (space and speed) for them to pass straight
through to floating-point hardware instructions; this case is made to
use t-hardfp to achieve that. For soft-float, direct use of soft-fp
functions for operations involving DImode or unsigned integers is more
efficient than using the libgcc2.c versions of those operations to
convert to operations on other types (which then end up calling
soft-fp functions for those other types, possibly more than once);
this case is thus stopped from using t-softfp-excl. (A future patch
will stop the e500 cases from using t-softfp-excl as well.)
Tested with no regressions for crosses to powerpc-linux-gnu (soft
float and classic hard float); also checked that the same set of
symbols and versions is exported from shared libgcc before and after
the patch.
* configure.ac (ppc_fp_type): Set variable on powerpc*-*-linux*.
* configure: Regenerate.
* config.host (powerpc*-*-linux*): Use $ppc_fp_type to determine
additions to tmake_file. Use t-hardfp-sfdf and t-hardfp instead
of soft-fp for 32-bit classic hard float. Do not use
t-softfp-excl for soft float.
From-SVN: r216687
When I added support for using soft-fp in libgcc
<https://gcc.gnu.org/ml/gcc-patches/2006-03/msg00689.html>, libgcc
configuration was still done in the gcc/ directory, meaning that the
variables set in makefile fragments could not depend on the multilib
being built. Thus, building the soft-fp code for powerpc64-linux-gnu
was disabled in the same way as had been done with fp-bit: the code
was built, but with #ifndef __powerpc64__ wrappers around it so that
the resulting objects were empty.
Now that libgcc configuration is done in the toplevel libgcc
directory, such uses of softfp_wrap_start / softfp_wrap_end are better
replaced by configure-time conditionals that determine whether to use
soft-fp for a given multilib. This patch does so for
powerpc*-*-linux*. The same would appear to apply to
powerpc*-*-freebsd* (using rs6000/t-freebsd64), but I have not made
any changes there. t-ppc64-fp is also used by AIX targets, but they
don't use soft-fp anyway so the changes are of no consequence to them.
The same principle of replacing softfp_wrap_start / softfp_wrap_end
with configure-time conditionals also applies to
softfp_exclude_libgcc2, which was intended for cases where soft-fp is
being used on hard-float multilibs and so it is desirable on those
multilibs for a few functions to come from libgcc2.c rather than
soft-fp (but the soft-fp versions would be more efficient on
soft-float multilibs). Now we have hardfp.c and t-hardfp, those are
better to use in that case, to minimize the size of the bulk of the
functions that are only present for ABI compatibility and should never
be called by newly compiled code.
I intend followup patches to switch 32-bit hard-float multilibs to use
t-hardfp as far as possible (for all non-libgcc2.c operations for
classic hard float; for all except __unord* for e500v2; for all SFmode
operations except __unordsf2 for e500v1). After that will come making
the soft-fp operations, in the remaining cases for which they are
built because they are actually needed for code compiled by current
GCC, into compat symbols when building for glibc 2.19 or later, so
that the glibc versions (with exception and rounding mode support) get
used instead (2.19 or later is needed for all the functions to be
exported from glibc as non-compat symbols). In turn, that is required
before implementing TARGET_ATOMIC_ASSIGN_EXPAND_FENV for soft-float
and e500, as that can only be properly effective when GCC-compiled
code is actually interoperating correctly with the exception and
rounding mode state used by <fenv.h> functions.
Tested with no regressions with cross to powerpc64-linux-gnu (in
addition, verified that stripped libgcc_s.so.1 is identical before and
after the patch).
* config.host (powerpc*-*-linux*): Only use soft-fp for 32-bit
configurations.
* config/rs6000/t-ppc64-fp (softfp_wrap_start, softfp_wrap_end):
Remove variables.
From-SVN: r216564
2014-03-20 Joel Sherrill <joel.sherrill@oarcorp.com>
* config.host (v850*-*-*): Add to tmake_file instead of resetting
it. This was removing the v850*-*-rtems* settings.
From-SVN: r208708
contrib/
2013-12-31 Chung-Lin Tang <cltang@codesourcery.com>
* config-list.mk: Add nios2-elf, nios2-linux-gnu. Corrected
ordering of some configs.
gcc/
2013-12-31 Chung-Lin Tang <cltang@codesourcery.com>
Sandra Loosemore <sandra@codesourcery.com>
Based on patches from Altera Corporation
* config.gcc (nios2-*-*): Add nios2 config targets.
* configure.ac (TLS_SECTION_ASM_FLAG): Add nios2 case.
("$cpu_type"): Add nios2 as new cpu type.
* configure: Regenerate.
* config/nios2/nios2.c: New file.
* config/nios2/nios2.h: New file.
* config/nios2/nios2-opts.h: New file.
* config/nios2/nios2-protos.h: New file.
* config/nios2/elf.h: New file.
* config/nios2/elf.opt: New file.
* config/nios2/linux.h: New file.
* config/nios2/nios2.opt: New file.
* config/nios2/nios2.md: New file.
* config/nios2/predicates.md: New file.
* config/nios2/constraints.md: New file.
* config/nios2/t-nios2: New file.
* common/config/nios2/nios2-common.c: New file.
* doc/invoke.texi (Nios II options): Document Nios II specific
options.
* doc/md.texi (Nios II family): Document Nios II specific
constraints.
* doc/extend.texi (Function Specific Option Pragmas): Document
Nios II supported target pragma functionality.
gcc/testsuite/
2013-12-31 Sandra Loosemore <sandra@codesourcery.com>
Chung-Lin Tang <cltang@codesourcery.com>
Based on patches from Altera Corporation
* gcc.dg/stack-usage-1.c (SIZE): Define case for __nios2__.
* gcc.dg/20040813-1.c: Skip for nios2-*-*.
* gcc.dg/20020312-2.c: Add __nios2__ case.
* g++.dg/other/PR23205.C: Skip for nios2-*-*.
* g++.dg/other/pr23205-2.C: Skip for nios2-*-*.
* g++.dg/cpp0x/constexpr-rom.C: Skip for nios2-*-*.
* g++.dg/cpp0x/alias-decl-debug-0.C: Skip for nios2-*-*.
* g++.old-deja/g++.jason/thunk3.C: Skip for nios2-*-*.
* lib/target-supports.exp (check_profiling_available): Check for
nios2-*-elf.
* gcc.c-torture/execute/pr47237.x:: Skip for nios2-*-*.
* gcc.c-torture/execute/20101011-1.c: Skip for nios2-*-*.
* gcc.c-torture/execute/builtins/lib/chk.c (memset): Place
char-based memset loop before inline check, to prevent
problems when called to initialize .bss. Update comments.
* gcc.target/nios2/nios2.exp: New DejaGNU file.
* gcc.target/nios2/nios2-custom-1.c: New test.
* gcc.target/nios2/nios2-trap-insn.c: New test.
* gcc.target/nios2/nios2-builtin-custom.c: New test.
* gcc.target/nios2/nios2-builtin-io.c: New test.
* gcc.target/nios2/nios2-stack-check-1.c: New test.
* gcc.target/nios2/nios2-stack-check-2.c: New test.
* gcc.target/nios2/nios2-rdctl.c: New test.
* gcc.target/nios2/nios2-wrctl.c: New test.
* gcc.target/nios2/nios2-wrctl-zero.c: New test.
* gcc.target/nios2/nios2-wrctl-not-zero.c: New test.
* gcc.target/nios2/nios2-rdwrctl-1.c: New test.
* gcc.target/nios2/nios2-reg-constraints.c: New test.
* gcc.target/nios2/nios2-ashlsi3-one_shift.c: New test.
* gcc.target/nios2/nios2-mul-options-1.c: New test.
* gcc.target/nios2/nios2-mul-options-2.c: New test.
* gcc.target/nios2/nios2-mul-options-3.c: New test.
* gcc.target/nios2/nios2-mul-options-4.c: New test.
* gcc.target/nios2/nios2-nor.c: New test.
* gcc.target/nios2/nios2-stxio.c: New test.
* gcc.target/nios2/custom-fp-1.c: New test.
* gcc.target/nios2/custom-fp-2.c: New test.
* gcc.target/nios2/custom-fp-3.c: New test.
* gcc.target/nios2/custom-fp-4.c: New test.
* gcc.target/nios2/custom-fp-5.c: New test.
* gcc.target/nios2/custom-fp-6.c: New test.
* gcc.target/nios2/custom-fp-7.c: New test.
* gcc.target/nios2/custom-fp-8.c: New test.
* gcc.target/nios2/custom-fp-cmp-1.c: New test.
* gcc.target/nios2/custom-fp-conversion.c: New test.
* gcc.target/nios2/custom-fp-double.c: New test.
* gcc.target/nios2/custom-fp-float.c: New test.
* gcc.target/nios2/nios2-int-types.c: New test.
* gcc.target/nios2/nios2-cache-1.c: New test.
* gcc.target/nios2/nios2-cache-2.c: New test.
libgcc/
2013-12-31 Sandra Loosemore <sandra@codesourcery.com>
Chung-Lin Tang <cltang@codesourcery.com>
Based on patches from Altera Corporation
* config.host (nios2-*-*,nios2-*-linux*): Add nios2 host cases.
* config/nios2/lib2-nios2.h: New file.
* config/nios2/lib2-divmod-hi.c: New file.
* config/nios2/linux-unwind.h: New file.
* config/nios2/lib2-divmod.c: New file.
* config/nios2/linux-atomic.c: New file.
* config/nios2/t-nios2: New file.
* config/nios2/crti.asm: New file.
* config/nios2/t-linux: New file.
* config/nios2/lib2-divtable.c: New file.
* config/nios2/lib2-mul.c: New file.
* config/nios2/tramp.c: New file.
* config/nios2/crtn.asm: New file.
From-SVN: r206256
gcc/
* config/i386/i386-c.c (ix86_target_macros): Define _SOFT_FLOAT
for !TARGET_80387.
* config/i386/rtemself.h (TARGET_OS_CPP_BUILTINS): Do not define
_SOFT_FLOAT here.
(LONG_DOUBLE_TYPE_SIZE): New define.
(LIBGCC2_LONG_DOUBLE_TYPE_SIZE): Ditto.
libgcc/
* config/i386/32/sfp-machine.h (_FP_MUL_MEAT_S): Define.
(_FP_MUL_MEAT_D): Ditto.
(_FP_DIV_MEAT_S): Ditto.
(_FP_DIV_MEAT_D): Ditto.
* config.host (i[34567]86-*-rtems*): Remove i386/t-softfp, add
t-softfp-sfdf and t-softfp to tmake_file.
M gcc/config/i386/i386-c.c
M gcc/config/i386/rtemself.h
M gcc/ChangeLog
M libgcc/ChangeLog
M libgcc/config.host
M libgcc/config/i386/32/sfp-machine.h
From-SVN: r204404
* config.host (cpu_type) <Setting default>: Add entry for
crisv32-*-*.
(tmake_file) <crisv32-*-elf, cris-*-elf, cris-*-linux*>
<crisv32-*-linux*>: Adjust.
* longlong.h: Wrap the whole CRIS section in a single
defined(__CRIS__) conditional. Add comment about add_ssaaaa
and sub_ddmmss.
(COUNT_LEADING_ZEROS_0): Define when count_leading_zeros is
defined.
[__CRIS__] (__umulsidi3): Define.
[__CRIS__] (umul_ppmm): Define in terms of __umulsidi3.
* config/cris/sfp-machine.h: New file.
* config/cris/umulsidi3.S: New file.
* config/cris/t-elfmulti (LIB2ADD_ST): Add umulsidi3.S.
* config/cris/arit.c (SIGNMULT): New macro.
(__Div, __Mod): Use SIGNMULT instead of naked multiplication.
* config/cris/mulsi3.S: Tweak to avoid redundant register-copying;
saving 3 out of originally 33 cycles from the fastest
path, 3 out of 54 from the medium path and one from the longest
path. Improve comments.
From-SVN: r203640
