+2007-05-08 Bernd Schmidt <bernd.schmidt@analog.com>
+
+ * config/bfin/bfin.h (MOVE_RATIO): Define.
+
+2007-05-10 Richard Sandiford <richard@codesourcery.com>
+
+ * config.gcc (sparc-wrs-vxworks): New target.
+ * config/sparc/vxworks.h, config/sparc/t-vxworks: New files.
+ * config/sparc/sparc-protos.h (sparc_emit_call_insn): Declare.
+ * config/sparc/sparc.h: Include vxworks-dummy.h.
+ (PRINT_OPERAND_ADDRESS): Extend SYMBOL_REF handling to
+ include LABEL_REFs too.
+ * config/sparc/sparc.c (sparc_expand_move): Don't assume that
+ _GLOBAL_OFFSET_TABLE_ - label_ref is a link-time constant on
+ VxWorks.
+ (legitimize_pic_address): Handle LABEL_REFs like SYMBOL_REFs
+ on VxWorks.
+ (load_pic_register): Use gen_vxworks_load_got for VxWorks.
+ (sparc_emit_call_insn): New function.
+ (sparc_function_ok_for_sibcall): Restrict sibcalls to locally-binding
+ functions when generating VxWorks PIC.
+ * config/sparc/sparc.md (vxworks_load_got): New pattern.
+ (call, call_value): Use sparc_emit_call_insn instead of
+ emit_call_insn.
+
+2007-05-09 Bob Wilson <bob.wilson@acm.org>
+
+ * config/xtensa/xtensa.c (xtensa_output_literal): Don't use #if.
+
+2007-05-09 Bob Wilson <bob.wilson@acm.org>
+
+ * config/xtensa/xtensa.c (xtensa_output_literal): Mask out high bits
+ for floating-point values if HOST_BITS_PER_LONG > 32. Use split_double
+ instead of operand_subword.
+
+2007-05-08 Bernd Schmidt <bernd.schmidt@analog.com>
+
+ * config/bfin/bfin.h (LOCAL_ALIGNMENT): Define.
+ * config/bfin/bfin.c (bfin_local_alignment): New function.
+ * config/bfin/bfin-protos.h (bfin_local_alignment): Declare it.
+
+2007-05-08 Chao-ying Fu <fu@mips.com>
+
+ * doc/md.texi (msub@var{m}@var{n}4, usub@var{m}@var{n}4): Document.
+ * optabs.h (OTI_smsub_widen, OTI_umsub_widen): New optab_indexes.
+ (smsub_widen_optab, umsub_widen_optab): Define.
+ * optabs.c (init_optabs): Initialize smsub_widen_optab and
+ umsub_widen_optab.
+ * genopinit.c (optabs): Fill in smsub_widen_optab and
+ umsub_widen_optab.
+ * expr.c (expand_expr_real_1): Try to use smsub_widen_optab
+ and umsub_widen_optab to implement multiply-subtract sequences.
+ * config/mips/mips.md (*msac<u>_di): Rename to...
+ (<u>msubsidi4): ...this. Extend condition to include
+ GENERATE_MADD_MSUB and TARGET_DSPR2. Change the constraint
+ of operand 0 to "ka" and use the three-operand form of msub<u>
+ for TARGET_DSPR2.
+ * config/mips/mips-dspr2.md (mips_msub, mips_msubu): Convert
+ to define_expands.
+
+2007-05-08 Kaz Kojima <kkojima@gcc.gnu.org>
+
+ PR rtl-optimization/28011
+ * reload.c (push_reload): Set dont_share if IN appears in OUT
+ also when IN is a PLUS rtx.
+ (reg_overlap_mentioned_for_reload_p): Return true if X and IN
+ are same PLUS rtx.
+
+2007-05-08 Kazu Hirata <kazu@codesourcery.com>
+
+ * emit-rtl.c (unshare_all_rtl_1): Don't copy DECL_RTL. Don't
+ call unshare_all_decls.
+ (unshare_all_rtl): Adjust the call to unshare_all_rtl_1.
+ (unshare_all_decls): Remove.
+
+2007-05-08 Simon Martin <simartin@users.sourceforge.net>
+
+ PR 31847
+ * tree-dump.c (dump_options): Don't use TDF_DIAGNOSTIC in "*-all" tree
+ dumps.
+
+2007-05-08 Sandra Loosemore <sandra@codesourcery.com>
+ Nigel Stephens <nigel@mips.com>
+
+ * config/mips/mips.h (MAX_FPRS_PER_FMT): Renamed from FP_INC.
+ Update comments and all uses.
+ (MIN_FPRS_PER_FMT): Define.
+ * config/mips/mips.c (function_arg): Fix to correctly handle
+ the -mips32r2 -mfp64 -mabi=32 case.
+ (override_options): Enable use of odd-numbered registers for
+ SFmode values on MIPS32.
+ (mips_save_reg_p): Save whole floating-point register pair if
+ either half is used.
+ (compute_frame_size): Fix comment.
+
+2007-05-08 Jie Zhang <jie.zhang@analog.com>
+
+ * config/bfin/bfin-protos.h (bfin_expand_epilogue): Add a third
+ argument of type bool.
+ * config/bfin/bfin.c (add_to_reg): Add epilogue_p as a fourth
+ argument. Safely select temporary P register according to it.
+ (do_link): Change call site of add_to_reg accordingly.
+ (do_unlink): Add epilogue_p as a fourth argument and pass it
+ to add_to_reg.
+ (expand_interrupt_handler_epilogue): Change call of do_unlink
+ accordingly.
+ (bfin_expand_prologue): Add a third argument sibcall_p.
+ * config/bfin/bfin.md (epilogue): Change call of
+ bfin_expand_epilogue accordingly.
+ (sibcall_epilogue): Likewise.
+ (eh_return_internal): Likewise.
+
+ * config/bfin/bfin-protos.h (enum bfin_cpu): Add
+ BFIN_CPU_BF534, BFIN_CPU_BF536 and BFIN_CPU_BF561.
+ * config/bfin/bfin.c (bfin_handle_option): Handle
+ -mcpu=bf534, -mcpu=bf536 and -mcpu=bf561.
+ * config/bfin/bfin.h (TARGET_CPU_CPP_BUILTINS):
+ Support bf534, bf536 and bf561.
+ * doc/invoke.texi (Blackfin Options): Document -mcpu and -msim.
+
+2007-05-08 Uros Bizjak <ubizjak@gmail.com>
+
+ PR target/31854
+ * config/i386/i386.c (ix86_function_regparm): Process local
+ functions only when TREE_CODE (decl) equals FUNCTION_DECL.
+
+2007-05-07 Mike Stump <mrs@apple.com>
+
+ * doc/invoke.texi (Warning Options): Document that -Wempty-body
+ also checks for and while statements in C++.
+
+2007-05-07 Nathan Froyd <froydnj@codesourcery.com>
+
+ * gcc.c (at_file_supplied): New variable.
+ (main): Set it if we expanded argv.
+ (do_spec_1): Pass an @-file to the linker if we were called with
+ an @-file argument and HAVE_GNU_LD.
+ * collect2.c (at_file_supplied): New variable.
+ (response_file): New variable.
+ (collect_exit): Unlink response_file if necessary.
+ (handler): Likewise.
+ (do_wait): Likewise.
+ (main): Set at_file_supplied if we expanded argv.
+ (collect_execute): Pass an @-file to subprocesses if we were called
+ with an @-file argument.
+ * configure.ac: Add define for HAVE_GNU_LD.
+ * configure: Regenerate.
+ * config.in: Regenerate.
+
+2007-05-07 Naveen.H.S <naveen.hs@kpitcummins.com>
+
+ * config/m32c/muldiv.md (mulhisi3_c): Limit the mode of the 2nd
+ operand to HI mode.
+ (mulsi3): New.
+ (divsi3): New.
+ (udivsi3): New.
+
+2007-05-07 Jayant Sonar <jayants@kpitcummins.com>
+
+ * config/m32c/m32c.c (SYMBOL_FLAG_FUNCVEC_FUNCTION): Define.
+ (TARGET_ENCODE_SECTION_INFO): Re-define.
+ (m32c_encode_section_info): New
+ (function_vector_handler): New
+ (current_function_special_page_vector): New
+ (m32c_special_page_vector_p): New.
+ * config/m32c/m32c-protos.h (m32c_special_page_vector_p):
+ Prototype.
+ * config/m32c/jump.md: Added instruction JSRS for functions
+ with attribute "function_vector".
+ * doc/extend.texi (function_vector): Added description
+ for M16C, M32C targets.
+
+2007-05-07 DJ Delorie <dj@redhat.com>
+
+ PR 31794
+ * config/m32c/shift.md (ashlpsi3_i, ashrpsi3_i, ashlpsi3,
+ ashrpsi3, lshrpsi3): Update shift count constraint.
+
+2007-05-07 Danny Smith <dannysmith@users.sourceforge.net>
+ Nathan Froyd <froydnj@codesourcery.com>
+
+ PR 22133
+ * c-incpath.c (add_path): Strip trailing path separators.
+
+2007-05-07 Eric Botcazou <ebotcazou@adacore.com>
+
+ * tree-ssa-dom.c (tree_ssa_dominator_optimize): Reset cfg_altered.
+ Free dominance info before purging EH edges.
+ (eliminate_degenerate_phis): Likewise.
+ (propagate_rhs_into_lhs): Set cfg_altered to true instead of 1.
+
+2007-05-07 Jan Hubicka <jh@suse.cz>
+
+ * gimplify.c (gimplify_expr): Do not crash when folding
+ (void *)(int)&a + 4.
+
+2007-05-07 Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
+
+ PR driver/31694
+ * c-opts.c (lang_fortran): Make it non static.
+ * c-common.h (lang_fortran): New prototype.
+ * c-cppbuiltin.c (c_cpp_builtins): Create a __GFORTRAN__ if the
+ -lang-fortran option was passed by the driver.
+
+2007-05-06 Eric Botcazou <ebotcazou@adacore.com>
+
+ * timevar.c (timevar_print): Test ENABLE_ASSERT_CHECKING instead
+ of ASSERT_CHECKING. Tweak message.
+
+2007-05-06 Revital Eres <eres@il.ibm.com>
+
+ PR 30957
+ * loop-unroll.c (insert_var_expansion_initialization):
+ Initialize the expansions with -zero instead of +zero.
+
+2007-05-05 Aurelien Jarno <aurelien@aurel32.net>
+
+ * config/pa/pa.md: Split tgd_load, tld_load and tie_load
+ into pic and non-pic versions. Mark r19 as used for
+ tgd_load_pic, tld_load_pic and tie_load_pic. Mark r27 as used
+ for tgd_load, tld_load and tie_load .
+ * config/pa/pa.c (legitimize_tls_address): Emit pic or non-pic
+ version of tgd_load, tld_load and tie_load depending on the
+ value of flag_pic.
+
+2007-05-04 Ulrich Drepper <drepper@redhat.com>
+ Jakub Jelinek <jakub@redhat.com>
+
+ * crtstuff.c (HIDDEN_DTOR_LIST_END): New macro.
+ (__do_global_dtors_aux): Use more paranoid loop to run
+ destructors if HIDDEN_DTOR_LIST_END.
+ (__DTOR_END__): Export as a hidden symbol when HIDDEN_DTOR_LIST_END.
+
+2007-05-04 Jakub Jelinek <jakub@redhat.com>
+
+ * varasm.c (align_variable): Don't increase alignment for
+ DECL_THREAD_LOCAL_P variables above BITS_PER_WORD through
+ DATA_ALIGNMENT or CONSTANT_ALIGNMENT.
+
+2007-05-04 Josh Conner <jconner@apple.com>
+
+ * basic-block.h (cdi_direction): Assign values to all enumeration
+ constants.
+ (dom_computed): Remove.
+ (dom_info_state): New.
+ (set_dom_info_availability): New.
+ * tree-ssa-loop-im.c (determine_invariantness): Initialize
+ walk_data.dom_direction.
+ * cfghooks.c (delete_basic_block): Use dom_info_available_p()
+ instead of dom_computed[].
+ (split_edge): Likewise.
+ (create_basic_block): Likewise.
+ (merge_blocks): Likewise.
+ * ifcvt.c (find_if_header): Likewise.
+ * tree-cfgcleanup.c (cleanup_tree_cfg): Likewise.
+ * tree-ssa-dce.c (remove_dead_stmt): Likewise.
+ * tree-ssa.c (verify_ssa): Likewise.
+ * tree-cfg.c (tree_verify_flow_info): Likewise.
+ (remove_edge_and_dominated_blocks): Likewise.
+ * dominance.c (dom_computed): Make static.
+ (calc_dfs_tree_nonrec): Change third param to a bool.
+ (calc_dfs_tree): Change second param to a bool.
+ (calc_idioms): Change second param to a bool. Use
+ dom_convert_dir_to_idx.
+ (init_dom_info): Validate dir before using.
+ (dom_convert_dir_to_idx): New.
+ (calculate_dominance_info): Use dom_convert_dir_to_idx. New
+ variable 'reverse' used for calling calc_dfs_tree and calc_idoms.
+ (free_dominance_info): Use dom_convert_dir_to_idx.
+ (get_immediate_dominator): Likewise.
+ (set_immediate_dominator): Likewise.
+ (get_dominated_by): Likewise.
+ (redirect_immediate_dominators): Likewise.
+ (nearest_common_denominator): Likewise.
+ (dominated_by_p): Likewise.
+ (bb_dom_dfs_in): Likewise.
+ (bb_dom_dfs_out): Likewise.
+ (recount_dominator): Likewise.
+ (iterate_fix_dominators): Likewise.
+ (add_to_dominance_info): Likewise.
+ (delete_from_dominance_info): Likewise.
+ (first_dom_son): Likewise.
+ (next_dom_son): Likewise.
+ (dom_info_available_p): Likewise.
+ (dom_info_state): New.
+ (set_dom_info_availability): New.
+
+2007-05-04 Andreas Krebbel <krebbel1@de.ibm.com>
+
+ * config/s390/s390.md ("fix_trunc<mode>di2", "fix_trunc<mode>si2"):
+ Expander removed.
+ ("fix_trunc<DSF:mode><GPR:mode>2"): Expander added.
+
+2007-05-04 Bob Wilson <bob.wilson@acm.org>
+
+ * config/xtensa/xtensa.md (adddi3, adddi_carry): Delete.
+ (subdi3, subdi_carry): Delete.
+
+2007-05-04 Jan Hubicka <jh@suse.cz>
+ Richard Guenther <rguenther@suse.de>
+
+ * opts.c (decode_options): Do not fiddle with inlining
+ parameters in case of optimizing for size.
+ * ipa-inline.c (cgraph_decide_recursive_inlining): When optimizing
+ for size do nothing.
+ (cgraph_decide_inlining_of_small_function): When optimizing for
+ size never inline functions increasing caller size.
+ (cgraph_early_inlining): Inline for size when optimizing for size.
+
+2007-04-18 Bernd Schmidt <bernd.schmidt@analog.com>
+
+ * config/bfin/bfin.md (<optab>di3): Now a define_expand which expands
+ logical operations piecewise.
+ (<optab>di_zesidi_di, <optab>di_sesidi_di, negdi2, one_cmpldi2,
+ zero_extendsidi2, subdi_di_zesidi, subdi_zesidi_di, subdi_di_sesidi,
+ subdi_sesidi_di): Delete.
+ (add_with_carry): Produce carry in CC instead of a DREG to shorten
+ the generated sequence. Allow three-reg add in constraints. Rewrite
+ the rtl expression for carry to avoid zero_extend of a constant.
+ (sub_with_carry): New pattern.
+ (adddi3, subdi3): Change into define_expand. For subtract, generate a
+ different sequence not involving jumps.
+ (notbi): Now a named pattern.
+
+2007-05-04 Bradley Lucier <lucier@math.purdue.edu>
+
+ * doc/invoke.texi (i386 and x86-64 Options) [-mpc32, -mpc64, -mpc80]:
+ Add the note about a significant loss of accuracy of some
+ mathematical routines when these options are used.
+
+2007-05-04 Maxim Kuvyrkov <mkuvyrkov@ispras.ru>
+
+ * haifa-sched.c (rtx_vec_t): New typedef.
+ (contributes_to_priority_p): Extract piece of priority () into new
+ static function.
+ (priority): Use the function. Add assertion.
+ (rank_for_schedule, set_priorities): Add assertion to check that
+ insn's priority is initialized.
+ (clear_priorities, calc_priorities): Change signature. Make it update
+ all relevant insns. Update all callers ('add_to_speculative_block ()'
+ and 'create_block_check_twin ()').
+ * sched-int.h (struct haifa_insn_data): Remove field 'priority_known'.
+ Add new field 'priority_status'.
+ (INSN_PRIORITY_STATUS): New macro.
+ (INSN_PRIORITY_KNOWN): Change to use INSN_PRIORITY_STATUS.
+
+2007-05-04 Maxim Kuvyrkov <mkuvyrkov@ispras.ru>
+
+ * sched-ebb.c (debug_ebb_dependencies): New static function.
+ (init_ready_list): Use it.
+
+ * sched-rgn.c (debug_dependencies): Split into 'debug_dependencies ()'
+ with changed signature and 'debug_rgn_dependencies ()'.
+ (debug_rgn_dependencies): New static function.
+ (init_ready_list): Use it.
+
+ * sched-int.h (debug_dependencies): Declare.
+
+2007-05-04 Andreas Krebbel <krebbel1@de.ibm.com>
+
+ * libgcc-std.ver (__ffssi2): Added to GCC_4.3.0 section.
+
+2007-05-04 Dirk Mueller <dmueller@suse.de>
+
+ * c.opt(Wmain,ffreestanding): Enable for C++,ObjC++.
+
+2007-05-03 Jan Hubicka <jh@suse.cz>
+
+ * fold-const.c (fold_unary): Convert (T1)(X op Y) into ((T1)X op (T1)Y),
+ for pointer type in more cases than before.
+
+ * gimplify.c (gimplify_expr): Fold (void *)&a + 4.
+
+ * tree-object-size.c (plus_expr_object_size): When operand size is
+ unknown, return unknown.
+
+2007-05-03 Dirk Mueller <dmueller@suse.de>
+
+ * doc/invoke.texi (-m386,-m486,-mpentium,-mpentiumpro): Remove.
+
+ * config/i386/i386.h (CC1_CPU_SPEC): Remove handling for deprecated
+ options.
+
+ * config/i386/i386.opt (m386,m486,mpentium,mpentiumpro): Remove.
+
+2007-05-03 Janis Johnson <janis187@us.ibm.com>
+
+ * doc/sourcebuild.texi (Test Directives) Clarify dg-excess-errors.
+
+2007-05-03 Joseph Myers <joseph@codesourcery.com>
+
+ * config/soft-fp/double.h, config/soft-fp/extended.h,
+ config/soft-fp/floatundidf.c, config/soft-fp/floatundisf.c,
+ config/soft-fp/floatunsidf.c, config/soft-fp/floatunsisf.c,
+ config/soft-fp/op-2.h, config/soft-fp/op-4.h,
+ config/soft-fp/op-common.h, config/soft-fp/quad.h: Update from
+ glibc CVS.
+
+2007-05-03 Ian Lance Taylor <iant@google.com>
+
+ * config/rs6000/rs6000.c (rs6000_override_options): Don't set
+ MASK_PPC_GFXOPT for 8540 or 8548.
+
+2007-05-03 Uros Bizjak <ubizjak@gmail.com>
+
+ * tree-vect-transform.c (vect_update_inits_of_drs): Use
+ vect_print_dump_info() to output debug information.
+
+2007-05-03 Uros Bizjak <ubizjak@gmail.com>
+
+ PR target/31768
+ * config/i386/i386.c (print_operand) ['z']: Output 'w' for
+ operands of size 2 when operand is not MEM_P.
+
+2007-05-03 Zdenek Dvorak <dvorakz@suse.cz>
+
+ PR tree-optimization/30565
+ * lambda-code.c (perfect_nestify): Fix updating of dominators.
+
+2007-05-03 Bernd Schmidt <bernd.schmidt@analog.com>
+
+ * config/bfin/bfin.md (addpdi3, us_truncpdisi2): New patterns.
+ (umulsi3_highpart): Use them.
+ * config/bfin/lib1funcs.asm (__umulsi3_highpart): Use unsigned move
+ for final accumulator to D regisster tranfser.
+
+2007-05-03 Dorit Nuzman <dorit@il.ibm.com>
+
+ PR tree-optimization/31699
+ * tree-vect-analyze.c (vect_update_misalignment_for_peel): Remove wrong
+ code.
+ (vect_enhance_data_refs_alignment): Compute peel amount using
+ TYPE_VECTOR_SUBPARTS instead of vf.
+ * tree-vect-transform.c (vect_gen_niters_for_prolog_loop): Likewise.
+
+2007-05-02 Brooks Moses <brooks.moses@codesourcery.com>
+
+ PR bootstrap/31776
+ * system.h: Remove inclusion of double-int.h
+ * tree.h: Include double-int.h
+ * gengtype.c: Likewise
+ * cfgloop.h: Likewise
+ * Makefile.in: Adjust dependencies on double-int.h
+
+2007-05-02 Eric Christopher <echristo@apple.com>
+
+ * config/darwin.h (TARGET_OPTION_TRANSLATE_TABLE): Translate
+ -shared to -Zdynamiclib.
+
+2007-05-02 Seongbae Park <seongbae.park@gmail.com>
+
+ PR c++/31663
+ * c-common.c (strip_pointer_or_array_types): New function.
+ * c-common.h (strip_pointer_or_array_types): New function declaration.
+
+2007-05-03 Zdenek Dvorak <dvorakz@suse.cz>
+
+ PR tree-optimization/31771
+ * tree-cfg.c (move_block_to_fn): Assign bb to the correct index.
+
+2007-05-02 Paul Brook <paul@codesourcery.com>
+
+ * config/arm/bpabi.S (aeabi_lcmp): Fix result on overflow.
+
+2007-05-02 Andrew Pinski <andrew_pinski@playstation.sony.com>
+
+ PR middle-end/29715
+ * fold-const.c (fold_comparision): Remove the "foo++ == CONST"
+ transformation.
+
+2007-05-02 Nick Clifton <nickc@redhat.com>
+
+ * config/frv/predicates.md (symbolic_operand): Accept CONSTs.
+
2007-05-02 Richard Guenther <rguenther@suse.de>
PR tree-optimization/31146
2007-05-01 Dwarakanath Rajagopal <dwarak.rajagopal@amd.com>
- * doc/invoke.texi: Fix typo, 'AMD Family 10h core' instead of
+ * doc/invoke.texi: Fix typo, 'AMD Family 10h core' instead of
'AMD Family 10 core'.
-
+
2007-05-01 Dwarakanath Rajagopal <dwarak.rajagopal@amd.com>
- * config/i386/i386.c (override_options): Accept k8-sse3, opteron-sse3
- and athlon64-sse3 as improved versions of k8, opteron and athlon64
+ * config/i386/i386.c (override_options): Accept k8-sse3, opteron-sse3
+ and athlon64-sse3 as improved versions of k8, opteron and athlon64
with SSE3 instruction set support.
* doc/invoke.texi: Likewise.
-
+
2007-05-01 Dwarakanath Rajagopal <dwarak.rajagopal@amd.com>
* config/i386/i386.c (override_options): Tuning 32-byte loop
- alignment for amdfam10 architecture. Increasing the max loop
+ alignment for amdfam10 architecture. Increasing the max loop
alignment to 24 bytes.
-
+
2007-05-01 Kazu Hirata <kazu@codesourcery.com>
* config/m68k/constraints.md: New.
* config/xtensa/lib1funcs.asm (__umodsi3, __modsi3): Rearrange so that
DIV0 exception can fall through to a normal return.
-
+
2007-04-30 Alexandre Oliva <aoliva@redhat.com>
PR middle-end/22156
2007-04-26 Anatoly Sokolov <aesok@post.ru>
- * config/avr/avr.c (avr_mcu_types): Add support for ATmega8HVA and
+ * config/avr/avr.c (avr_mcu_types): Add support for ATmega8HVA and
ATmega16HVA devices. Move AT90USB82 device to 'avr5' architecture.
* config/avr/avr.h (LINK_SPEC, CRT_BINUTILS_SPECS): (Ditto.).
* config/avr/t-avr (MULTILIB_MATCHES): (Ditto.).
2007-04-24 Richard Guenther <rguenther@suse.de>
Olga Golovanevsky <olga@il.ibm.com>
- * fold-const.c (multiple_of_p): Check for bottom
- to be zero.
+ * fold-const.c (multiple_of_p): Check for bottom
+ to be zero.
2007-04-24 Richard Henderson <rth@redhat.com>
- * libgcc2.h (AVOID_FP_TYPE_CONVERSION): Rename from
+ * libgcc2.h (AVOID_FP_TYPE_CONVERSION): Rename from
IS_IBM_EXTENDED. Also define in terms of WIDEST_HARDWARE_FP_SIZE.
* libgcc2.c (__floatdisf): Avoid double-word arithmetic when
looking for non-zero bits shifted out. Avoid a recursive call
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