Make-lang.in, [...]: Find runtime source in libgnat/

2017-09-08  Nicolas Roche  <roche@adacore.com>

	* gcc-interface/Make-lang.in, gcc-interface/Makefile.in: Find runtime
	source in libgnat/
	* a-lfztio.ads, g-timsta.ads, g-sercom-linux.adb, s-osprim-solaris.adb,
	a-inteio.ads, s-stchop-rtems.adb, s-casuti.adb, s-pack39.adb,
	i-vxwork-x86.ads, a-strbou.adb, a-stzmap.adb, s-assert.adb,
	a-sfecin.ads, a-cohama.adb, s-casuti.ads, a-suenco.adb, s-pack39.ads,
	a-stzmap.ads, a-strbou.ads, s-stalib.adb, s-trasym.adb, g-comver.adb,
	s-assert.ads, s-vector.ads, g-cgi.adb, a-cohama.ads, s-wchcnv.adb,
	a-titest.adb, s-pack48.adb, a-suenco.ads, a-strunb.adb, s-stalib.ads,
	s-trasym.ads, a-nudira.adb, g-comver.ads, a-nuflra.adb, g-cgi.ads,
	a-chacon.adb, s-wchcnv.ads, a-excach.adb, s-pack48.ads, a-titest.ads,
	a-strunb.ads, s-dwalin.adb, a-nudira.ads, a-chtgbo.adb, s-resfil.adb,
	a-scteio.ads, a-nuflra.ads, g-soliop-mingw.ads, s-pack57.adb,
	a-chacon.ads, s-bytswa.ads, s-pooloc.adb, g-os_lib.adb, s-dwalin.ads,
	a-szuzha.adb, s-resfil.ads, a-chtgbo.ads, s-spsufi.adb, s-pack57.ads,
	s-pooloc.ads, g-os_lib.ads, a-stfiha.ads, a-lcteio.ads, a-wtcoau.adb,
	a-szuzha.ads, s-mmosin-unix.adb, a-stmaco.ads, s-spsufi.ads,
	s-stchop-limit.ads, a-wtcoau.ads, a-exctra.adb, s-mmosin-unix.ads,
	s-sequio.adb, s-conca2.adb, g-table.adb, s-imglli.adb,
	a-numaux-x86.adb, a-strsea.adb, s-wchstw.adb, a-clrefi.adb,
	a-wwboio.adb, a-exctra.ads, s-sequio.ads, s-conca2.ads, a-wwunio.ads,
	system-linux-hppa.ads, g-table.ads, s-dimkio.ads, s-imglli.ads,
	a-cofove.adb, a-numaux-x86.ads, s-wchstw.ads, a-strsea.ads,
	a-clrefi.ads, a-wwboio.ads, s-stratt-xdr.adb, s-crc32.adb,
	s-excmac-arm.adb, g-busora.adb, a-cofove.ads, s-osprim-unix.adb,
	g-io.adb, s-pack49.adb, s-crc32.ads, s-excmac-arm.ads, a-fzteio.ads,
	g-busora.ads, s-stausa.adb, system-linux-mips.ads, sequenio.ads,
	g-exctra.adb, g-rewdat.adb, a-cgaaso.adb, g-io.ads, s-pack49.ads,
	a-wtflau.adb, a-undesu.adb, s-stausa.ads, a-ztenau.adb, g-enutst.ads,
	calendar.ads, s-pack58.adb, g-rewdat.ads, g-exctra.ads, s-ststop.adb,
	a-cgaaso.ads, a-strfix.adb, a-comlin.adb, a-strunb-shared.adb,
	a-wtflau.ads, a-undesu.ads, a-cbhase.adb, a-ztenau.ads, s-os_lib.adb,
	a-coorse.adb, a-chlat1.ads, s-pack58.ads, s-ststop.ads, a-strfix.ads,
	a-comlin.ads, a-strunb-shared.ads, a-nscefu.ads, s-valboo.adb,
	directio.ads, a-chtgke.adb, a-cbhase.ads, a-wtinau.adb,
	system-linux-alpha.ads, s-os_lib.ads, a-coorse.ads,
	system-linux-s390.ads, s-imgwiu.adb, a-chtgop.adb, s-valboo.ads,
	a-chtgke.ads, a-tienio.adb, s-conca3.adb, a-wtinau.ads,
	system-darwin-ppc.ads, i-c.adb, s-expllu.adb, g-expect.adb,
	g-sha256.ads, s-vallld.adb, s-imgwiu.ads, a-chtgop.ads, a-strmap.adb,
	a-tienio.ads, s-conca3.ads, s-imgint.adb, i-c.ads, s-expllu.ads,
	s-osprim-darwin.adb, a-cogeso.adb, g-expect.ads, a-iwteio.ads,
	s-vallld.ads, a-coinho-shared.adb, g-shsh64.adb, a-strmap.ads,
	g-comlin.adb, a-excpol.adb, s-imgint.ads, a-ztdeau.adb, a-cogeso.ads,
	a-coinho-shared.ads, g-shsh64.ads, g-comlin.ads, a-stzsup.adb,
	a-rbtgbk.adb, a-wtmoau.adb, a-ztdeau.ads, s-exnlli.adb, g-tty.adb,
	g-heasor.adb, g-socthi-dummy.adb, s-llflex.ads, a-zchara.ads,
	a-stzsup.ads, a-ztcstr.adb, a-rbtgbk.ads, a-sfwtio.ads, a-wtmoau.ads,
	a-sulcin.adb, s-exnlli.ads, system-freebsd.ads, a-stunha.adb,
	a-charac.ads, g-tty.ads, g-heasor.ads, s-exctra.adb,
	g-socthi-dummy.ads, a-coboho.adb, a-ztcstr.ads, a-tideio.adb,
	a-sulcin.ads, a-wrstfi.adb, g-alleve.adb, s-pack59.adb, a-ngrear.adb,
	a-stboha.adb, a-stunau-shared.adb, a-stunha.ads, a-lfwtio.ads,
	s-fileio.adb, s-exctra.ads, a-coboho.ads, a-ioexce.ads, a-tideio.ads,
	a-ngrear.ads, a-wrstfi.ads, s-pack59.ads, g-alleve.ads, a-stboha.ads,
	s-poosiz.adb, g-traceb.adb, g-rannum.adb, machcode.ads, s-purexc.ads,
	s-fileio.ads, a-cfinve.adb, a-crbtgk.adb, system-solaris-x86.ads,
	s-poosiz.ads, g-rannum.ads, g-traceb.ads, a-except.adb, s-conca4.adb,
	a-stream.adb, a-cfinve.ads, a-crbtgk.ads, s-wchwts.adb,
	system-mingw.ads, a-except.ads, s-conca4.ads, a-chzla9.ads,
	s-valenu.adb, s-soflin.adb, a-stream.ads, a-cgarso.adb, s-valllu.adb,
	g-crc32.adb, s-wchwts.ads, s-fatflt.ads, s-imguns.adb, s-strcom.adb,
	g-decstr.adb, s-valenu.ads, s-soflin.ads, a-cgarso.ads, a-cwila1.ads,
	s-valllu.ads, g-crc32.ads, s-imguns.ads, g-spipat.adb, s-valwch.adb,
	s-strcom.ads, g-decstr.ads, text_io.ads, g-debuti.adb, s-stchop.adb,
	g-spipat.ads, s-valwch.ads, a-string.ads, s-exnint.adb, g-awk.adb,
	g-tasloc.adb, s-wwdenu.adb, s-boustr.adb, a-zchuni.adb, s-stchop.ads,
	g-debuti.ads, s-stopoo.adb, system-dragonfly-x86_64.ads,
	system-linux-x86.ads, s-exnint.ads, g-awk.ads, a-stzhas.adb,
	g-tasloc.ads, s-wwdenu.ads, g-debpoo.adb, g-except.ads,
	g-sse.ads, s-boustr.ads, a-zchuni.ads, s-bitops.adb, s-wwdwch.adb,
	s-stopoo.ads, a-catizo.adb, a-stzhas.ads, a-nlcefu.ads, g-debpoo.ads,
	i-vxwoio.adb, s-bitops.ads, g-io-put-vxworks.adb, s-wwdwch.ads,
	g-sehamd.adb, a-ssicst.adb, a-catizo.ads, s-mmap.adb, g-string.adb,
	s-traceb.adb, a-swunau.adb, s-rannum.adb, a-ticoau.adb, i-vxwoio.ads,
	g-sehamd.ads, a-stwiun.adb, a-ssicst.ads, s-conca5.adb, a-ssitio.ads,
	s-mmap.ads, a-zttest.adb, g-string.ads, g-sercom.adb, a-cdlili.adb,
	a-swunau.ads, s-traceb.ads, s-rannum.ads, a-ticoau.ads, system-aix.ads,
	a-cforma.adb, a-stwiun.ads, s-conca5.ads, s-carsi8.adb, a-zttest.ads,
	g-sercom.ads, a-cdlili.ads, a-cihama.adb, g-sptain.ads, a-cforma.ads,
	s-maccod.ads, s-carsi8.ads, a-strsup.adb, g-sha1.adb, a-cihama.ads,
	g-stseme.adb, s-traent.adb, s-valcha.adb, g-curexc.ads, a-strsup.ads,
	g-sha1.ads, a-sflcin.ads, s-traent.ads, s-pack10.adb, s-valcha.ads,
	a-coteio.ads, s-tasloc.adb, g-utf_32.adb, a-suteio.adb, s-except.adb,
	a-direct.adb, g-stsifd-sockets.adb, a-numaux-vxworks.ads, s-winext.ads,
	s-pack10.ads, a-ztexio.adb, a-tiflau.adb, system-vxworks-arm.ads,
	s-tasloc.ads, a-suteio.ads, g-utf_32.ads, s-except.ads,
	a-direct.ads, a-swbwha.adb, g-hesorg.adb, s-wwdcha.adb, a-wtedit.adb,
	a-ztexio.ads, a-wtcoio.adb, a-tiflau.ads, a-ssizti.ads, s-casi32.adb,
	a-swbwha.ads, s-veboop.adb, g-hesorg.ads, s-parame-rtems.adb,
	s-wwdcha.ads, a-wtedit.ads, a-stuten.adb, a-coinve.adb, a-wtcoio.ads,
	s-casi32.ads, s-string.adb, a-tiinau.adb, a-cusyqu.adb, s-conca6.adb,
	s-veboop.ads, a-cgcaso.adb, a-numaux-darwin.adb, a-envvar.adb,
	a-stuten.ads, s-secsta.adb, a-coinve.ads, s-string.ads, a-cusyqu.ads,
	a-tiinau.ads, s-osprim-vxworks.adb, s-conca6.ads, g-spchge.adb,
	s-parint.adb, a-cuprqu.adb, a-cgcaso.ads, a-numaux-darwin.ads,
	a-envvar.ads, s-secsta.ads, g-spchge.ads, s-parint.ads, a-cuprqu.ads,
	a-swuwti.adb, a-flteio.ads, a-sbhcin.adb, a-coprnu.adb, g-u3spch.adb,
	s-atocou.adb, g-ctrl_c.adb, a-swuwti.ads, a-calend.adb, a-sbhcin.ads,
	a-coprnu.ads, g-dirope.adb, g-sha512.ads, g-u3spch.ads, s-atocou.ads,
	g-ctrl_c.ads, a-timoau.adb, a-witeio.adb, s-pack11.adb, a-strhas.adb,
	a-wtflio.adb, g-spitbo.adb, a-calend.ads, a-ztenio.adb, g-dirope.ads,
	a-slcain.adb, g-sechas.adb, a-timoau.ads, a-witeio.ads, s-pack11.ads,
	s-shasto.adb, s-traceb-mastop.adb, a-ciorse.adb, s-utf_32.adb,
	a-strhas.ads, a-wtflio.ads, g-spitbo.ads, a-ztenio.ads, a-slcain.ads,
	g-sechas.ads, s-gearop.adb, a-siztio.ads, s-pack20.adb, s-shasto.ads,
	a-ciorse.ads, s-utf_32.ads, s-crtl.ads, a-wtinio.adb, s-elaall.adb,
	s-explli.adb, s-chepoo.ads, s-gearop.ads, a-einuoc.adb, s-pack20.ads,
	system-linux-ia64.ads, a-swunau-shared.adb, a-wtinio.ads, g-alvety.ads,
	a-liztio.ads, g-calend.adb, s-conca7.adb, s-elaall.ads, s-explli.ads,
	a-einuoc.ads, s-widboo.adb, s-imgdec.adb, a-cbhama.adb, g-calend.ads,
	s-conca7.ads, a-llitio.ads, i-cexten.ads, a-coorma.adb, s-widboo.ads,
	s-diflio.adb, g-souinf.ads, s-imgdec.ads, g-strhas.ads, a-cbhama.ads,
	g-shshco.adb, a-ztdeio.adb, s-gloloc.adb, a-coorma.ads, g-wispch.adb,
	s-pack03.adb, g-eacodu.adb, s-casi16.adb, s-diflio.ads, a-colien.adb,
	g-shshco.ads, a-wtmoio.adb, a-rbtgbo.adb, a-ztdeio.ads,
	system-rtems.ads, s-gloloc.ads, a-csquin.ads, a-cofuse.adb,
	g-wispch.ads, s-pack03.ads, s-casi16.ads, s-io.adb, a-colien.ads,
	g-alveop.adb, gnat.ads, s-diinio.adb, a-cfdlli.adb, g-pehage.adb,
	a-wtmoio.ads, a-stwiha.adb, a-locale.adb, a-tirsfi.adb, a-nscoty.ads,
	a-rbtgbo.ads, s-pack12.adb, a-cofuse.ads, a-sfteio.ads, s-io.ads,
	g-alveop.ads, a-cfdlli.ads, s-diinio.ads, a-stwiha.ads, g-pehage.ads,
	a-locale.ads, a-tirsfi.ads, s-pack12.ads, s-valuti.adb, g-cppexc.adb,
	system-vxworks-ppc.ads, g-memdum.adb, a-lfteio.ads, s-pack21.adb,
	s-unstyp.ads, s-valuti.ads, g-cppexc.ads, system-hpux-ia64.ads,
	g-memdum.ads, g-soccon.ads, g-altive.ads, a-crbtgo.adb, s-pack21.ads,
	a-llizti.ads, a-numaux-libc-x86.ads, s-expint.adb, s-conca8.adb,
	a-crbtgo.ads, s-pack30.adb, s-vallli.adb, s-geveop.adb, s-expint.ads,
	a-direio.adb, s-conca8.ads, a-widcha.ads, s-pack30.ads, s-vallli.ads,
	s-strhas.adb, s-geveop.ads, g-md5.adb, a-direio.ads, a-numaux.ads,
	s-ransee.adb, a-szbzha.adb, i-cobol.adb, g-busorg.adb, s-strhas.ads,
	g-md5.ads, s-widenu.adb, s-ransee.ads, s-widllu.adb, a-szbzha.ads,
	a-ststio.adb, i-cobol.ads, g-busorg.ads, g-regpat.adb, s-widenu.ads,
	a-secain.adb, s-widllu.ads, s-pack13.adb, g-encstr.adb, a-ztcoau.adb,
	a-ststio.ads, s-widwch.adb, g-regpat.ads, s-atacco.adb, a-cborse.adb,
	a-secain.ads, s-pack13.ads, g-encstr.ads, a-ztcoau.ads, s-widwch.ads,
	g-io_aux.adb, s-atacco.ads, a-ncelfu.ads, interfac.ads, a-cborse.ads,
	g-regexp.adb, s-pack22.adb, a-szuzti.adb, g-io_aux.ads, s-caun32.adb,
	a-nselfu.ads, g-regexp.ads, s-pack22.ads, a-ticoio.adb, a-szuzti.ads,
	g-diopit.adb, s-caun32.ads, s-conca9.adb, a-tags.adb, a-swmwco.ads,
	a-sbecin.adb, s-pack31.adb, s-expuns.adb, a-ticoio.ads, s-valint.adb,
	s-conca9.ads, g-diopit.ads, a-tags.ads, a-nllcef.ads, a-izteio.ads,
	a-sbecin.ads, s-expuns.ads, s-pack31.ads, g-dyntab.adb, s-powtab.ads,
	s-flocon-none.adb, s-valint.ads, a-ssiwti.ads, s-mmosin-mingw.adb,
	s-pack40.adb, s-pack05.adb, a-ztflau.adb, g-dyntab.ads,
	a-szuzti-shared.adb, g-alvevi.ads, a-stwise.adb, s-mmosin-mingw.ads,
	s-pack40.ads, a-diocst.adb, a-ztflau.ads, s-pack05.ads, a-nlcoty.ads,
	a-contai.ads, a-stwisu.adb, g-byorma.adb, a-siwtio.ads, a-stwise.ads,
	s-regpat.adb, g-mbdira.adb, s-pack14.adb, a-diocst.ads, g-flocon.ads,
	g-mbflra.adb, a-ztinau.adb, s-dim.ads, s-mantis.adb, a-stwisu.ads,
	g-byorma.ads, s-atopri.adb, g-wistsp.ads, a-uncdea.ads, s-widcha.adb,
	a-caldel.adb, s-regpat.ads, g-mbdira.ads, a-tiflio.adb, s-pack14.ads,
	s-parame.adb, a-liwtio.ads, s-memory.adb, g-mbflra.ads, a-ztinau.ads,
	a-wtgeau.adb, s-direio.adb, s-mantis.ads, s-atopri.ads, s-widcha.ads,
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	a-llftio.ads, s-memory.ads, s-regexp.adb, a-wtgeau.ads, a-exexda.adb,
	s-direio.ads, s-pack23.ads, g-stheme.adb, a-tiinio.adb, g-sestin.ads,
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	a-ztmoau.adb, a-cohata.ads, a-wtfiio.ads, s-imgrea.adb, ada.ads,
	a-szunau-shared.adb, a-comutr.ads, s-valuns.adb, a-ztmoau.ads,
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	a-elchha.adb, s-pack33.ads, a-cofuve.adb, s-parame-vxworks.ads,
	a-ciorma.ads, system-darwin-x86.ads, s-multip.adb, a-stwiun-shared.adb,
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	a-coormu.adb, a-siocst.adb, s-win32.ads, a-elchha.ads, s-pack42.adb,
	s-pack07.adb, a-cofuve.ads, system-hpux.ads, a-teioed.adb,
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	s-osprim-mingw.adb, s-casi64.adb, g-strspl.ads, g-socthi.ads,
	g-socket-dummy.adb, s-pack51.ads, s-dimmks.ads, s-casi64.ads,
	a-wtenau.adb, s-stchop-vxworks.adb, s-pack60.adb,
	system-solaris-sparc.ads, s-pack25.adb, g-socket-dummy.ads,
	a-exstat.adb, a-cofuma.adb, s-tsmona-linux.adb, a-wtenau.ads,
	s-pack60.ads, s-pack25.ads, i-cstrea.adb, a-cofuma.ads, g-exptty.adb,
	a-chzla1.ads, s-pack34.adb, i-cstrea.ads, s-excdeb.adb, a-iteint.ads,
	g-exptty.ads, i-pacdec.adb, s-pack34.ads, s-rident.ads, s-sopco3.adb,
	i-vxwork.ads, s-excdeb.ads, system-linux-ppc.ads, a-swuwti-shared.adb,
	s-widlli.adb, s-pack43.adb, i-pacdec.ads, a-cwila9.ads, s-sopco3.ads,
	a-fwteio.ads, s-widlli.ads, s-pack43.ads, a-suhcin.adb, a-wtdeau.adb,
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	s-pack52.adb, a-llctio.ads, a-nucoar.ads, s-pack17.adb, a-suhcin.ads,
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	a-ztfiio.ads, system-darwin-arm.ads: Move non-tasking runtime sources
	to libgnat subdirectory.

From-SVN: r251902

1 files changed, 0 insertions, 605 deletions

diff --git a/gcc/ada/s-arit64.adb b/gcc/ada/s-arit64.adb
deleted file mode 100644
index cbefe31..0000000
--- a/gcc/ada/s-arit64.adb
+++ /dev/null
@@ -1,605 +0,0 @@
-------------------------------------------------------------------------------
---                                                                          --
---                         GNAT RUN-TIME COMPONENTS                         --
---                                                                          --
---                      S Y S T E M . A R I T H _ 6 4                       --
---                                                                          --
---                                 B o d y                                  --
---                                                                          --
---          Copyright (C) 1992-2015, Free Software Foundation, Inc.         --
---                                                                          --
--- GNAT is free software;  you can  redistribute it  and/or modify it under --
--- terms of the  GNU General Public License as published  by the Free Soft- --
--- ware  Foundation;  either version 3,  or (at your option) any later ver- --
--- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
--- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
--- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
---                                                                          --
--- As a special exception under Section 7 of GPL version 3, you are granted --
--- additional permissions described in the GCC Runtime Library Exception,   --
--- version 3.1, as published by the Free Software Foundation.               --
---                                                                          --
--- You should have received a copy of the GNU General Public License and    --
--- a copy of the GCC Runtime Library Exception along with this program;     --
--- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
--- <http://www.gnu.org/licenses/>.                                          --
---                                                                          --
--- GNAT was originally developed  by the GNAT team at  New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc.      --
---                                                                          --
-------------------------------------------------------------------------------
-
-with Interfaces; use Interfaces;
-
-with Ada.Unchecked_Conversion;
-
-package body System.Arith_64 is
-
-   pragma Suppress (Overflow_Check);
-   pragma Suppress (Range_Check);
-
-   subtype Uns64 is Unsigned_64;
-   function To_Uns is new Ada.Unchecked_Conversion (Int64, Uns64);
-   function To_Int is new Ada.Unchecked_Conversion (Uns64, Int64);
-
-   subtype Uns32 is Unsigned_32;
-
-   -----------------------
-   -- Local Subprograms --
-   -----------------------
-
-   function "+" (A, B : Uns32) return Uns64 is (Uns64 (A) + Uns64 (B));
-   function "+" (A : Uns64; B : Uns32) return Uns64 is (A + Uns64 (B));
-   --  Length doubling additions
-
-   function "*" (A, B : Uns32) return Uns64 is (Uns64 (A) * Uns64 (B));
-   --  Length doubling multiplication
-
-   function "/" (A : Uns64; B : Uns32) return Uns64 is (A / Uns64 (B));
-   --  Length doubling division
-
-   function "&" (Hi, Lo : Uns32) return Uns64 is
-     (Shift_Left (Uns64 (Hi), 32) or Uns64 (Lo));
-   --  Concatenate hi, lo values to form 64-bit result
-
-   function "abs" (X : Int64) return Uns64 is
-     (if X = Int64'First then 2**63 else Uns64 (Int64'(abs X)));
-   --  Convert absolute value of X to unsigned. Note that we can't just use
-   --  the expression of the Else, because it overflows for X = Int64'First.
-
-   function "rem" (A : Uns64; B : Uns32) return Uns64 is (A rem Uns64 (B));
-   --  Length doubling remainder
-
-   function Le3 (X1, X2, X3 : Uns32; Y1, Y2, Y3 : Uns32) return Boolean;
-   --  Determines if 96 bit value X1&X2&X3 <= Y1&Y2&Y3
-
-   function Lo (A : Uns64) return Uns32 is (Uns32 (A and 16#FFFF_FFFF#));
-   --  Low order half of 64-bit value
-
-   function Hi (A : Uns64) return Uns32 is (Uns32 (Shift_Right (A, 32)));
-   --  High order half of 64-bit value
-
-   procedure Sub3 (X1, X2, X3 : in out Uns32; Y1, Y2, Y3 : Uns32);
-   --  Computes X1&X2&X3 := X1&X2&X3 - Y1&Y1&Y3 with mod 2**96 wrap
-
-   function To_Neg_Int (A : Uns64) return Int64 with Inline;
-   --  Convert to negative integer equivalent. If the input is in the range
-   --  0 .. 2 ** 63, then the corresponding negative signed integer (obtained
-   --  by negating the given value) is returned, otherwise constraint error
-   --  is raised.
-
-   function To_Pos_Int (A : Uns64) return Int64 with Inline;
-   --  Convert to positive integer equivalent. If the input is in the range
-   --  0 .. 2 ** 63-1, then the corresponding non-negative signed integer is
-   --  returned, otherwise constraint error is raised.
-
-   procedure Raise_Error with Inline;
-   pragma No_Return (Raise_Error);
-   --  Raise constraint error with appropriate message
-
-   --------------------------
-   -- Add_With_Ovflo_Check --
-   --------------------------
-
-   function Add_With_Ovflo_Check (X, Y : Int64) return Int64 is
-      R : constant Int64 := To_Int (To_Uns (X) + To_Uns (Y));
-
-   begin
-      if X >= 0 then
-         if Y < 0 or else R >= 0 then
-            return R;
-         end if;
-
-      else -- X < 0
-         if Y > 0 or else R < 0 then
-            return R;
-         end if;
-      end if;
-
-      Raise_Error;
-   end Add_With_Ovflo_Check;
-
-   -------------------
-   -- Double_Divide --
-   -------------------
-
-   procedure Double_Divide
-     (X, Y, Z : Int64;
-      Q, R    : out Int64;
-      Round   : Boolean)
-   is
-      Xu  : constant Uns64 := abs X;
-      Yu  : constant Uns64 := abs Y;
-
-      Yhi : constant Uns32 := Hi (Yu);
-      Ylo : constant Uns32 := Lo (Yu);
-
-      Zu  : constant Uns64 := abs Z;
-      Zhi : constant Uns32 := Hi (Zu);
-      Zlo : constant Uns32 := Lo (Zu);
-
-      T1, T2     : Uns64;
-      Du, Qu, Ru : Uns64;
-      Den_Pos    : Boolean;
-
-   begin
-      if Yu = 0 or else Zu = 0 then
-         Raise_Error;
-      end if;
-
-      --  Compute Y * Z. Note that if the result overflows 64 bits unsigned,
-      --  then the rounded result is clearly zero (since the dividend is at
-      --  most 2**63 - 1, the extra bit of precision is nice here).
-
-      if Yhi /= 0 then
-         if Zhi /= 0 then
-            Q := 0;
-            R := X;
-            return;
-         else
-            T2 := Yhi * Zlo;
-         end if;
-
-      else
-         T2 := (if Zhi /= 0 then Ylo * Zhi else 0);
-      end if;
-
-      T1 := Ylo * Zlo;
-      T2 := T2 + Hi (T1);
-
-      if Hi (T2) /= 0 then
-         Q := 0;
-         R := X;
-         return;
-      end if;
-
-      Du := Lo (T2) & Lo (T1);
-
-      --  Set final signs (RM 4.5.5(27-30))
-
-      Den_Pos := (Y < 0) = (Z < 0);
-
-      --  Check overflow case of largest negative number divided by 1
-
-      if X = Int64'First and then Du = 1 and then not Den_Pos then
-         Raise_Error;
-      end if;
-
-      --  Perform the actual division
-
-      Qu := Xu / Du;
-      Ru := Xu rem Du;
-
-      --  Deal with rounding case
-
-      if Round and then Ru > (Du - Uns64'(1)) / Uns64'(2) then
-         Qu := Qu + Uns64'(1);
-      end if;
-
-      --  Case of dividend (X) sign positive
-
-      if X >= 0 then
-         R := To_Int (Ru);
-         Q := (if Den_Pos then To_Int (Qu) else -To_Int (Qu));
-
-      --  Case of dividend (X) sign negative
-
-      else
-         R := -To_Int (Ru);
-         Q := (if Den_Pos then -To_Int (Qu) else To_Int (Qu));
-      end if;
-   end Double_Divide;
-
-   ---------
-   -- Le3 --
-   ---------
-
-   function Le3 (X1, X2, X3 : Uns32; Y1, Y2, Y3 : Uns32) return Boolean is
-   begin
-      if X1 < Y1 then
-         return True;
-      elsif X1 > Y1 then
-         return False;
-      elsif X2 < Y2 then
-         return True;
-      elsif X2 > Y2 then
-         return False;
-      else
-         return X3 <= Y3;
-      end if;
-   end Le3;
-
-   -------------------------------
-   -- Multiply_With_Ovflo_Check --
-   -------------------------------
-
-   function Multiply_With_Ovflo_Check (X, Y : Int64) return Int64 is
-      Xu  : constant Uns64 := abs X;
-      Xhi : constant Uns32 := Hi (Xu);
-      Xlo : constant Uns32 := Lo (Xu);
-
-      Yu  : constant Uns64 := abs Y;
-      Yhi : constant Uns32 := Hi (Yu);
-      Ylo : constant Uns32 := Lo (Yu);
-
-      T1, T2 : Uns64;
-
-   begin
-      if Xhi /= 0 then
-         if Yhi /= 0 then
-            Raise_Error;
-         else
-            T2 := Xhi * Ylo;
-         end if;
-
-      elsif Yhi /= 0 then
-         T2 := Xlo * Yhi;
-
-      else -- Yhi = Xhi = 0
-         T2 := 0;
-      end if;
-
-      --  Here we have T2 set to the contribution to the upper half of the
-      --  result from the upper halves of the input values.
-
-      T1 := Xlo * Ylo;
-      T2 := T2 + Hi (T1);
-
-      if Hi (T2) /= 0 then
-         Raise_Error;
-      end if;
-
-      T2 := Lo (T2) & Lo (T1);
-
-      if X >= 0 then
-         if Y >= 0 then
-            return To_Pos_Int (T2);
-         else
-            return To_Neg_Int (T2);
-         end if;
-      else -- X < 0
-         if Y < 0 then
-            return To_Pos_Int (T2);
-         else
-            return To_Neg_Int (T2);
-         end if;
-      end if;
-
-   end Multiply_With_Ovflo_Check;
-
-   -----------------
-   -- Raise_Error --
-   -----------------
-
-   procedure Raise_Error is
-   begin
-      raise Constraint_Error with "64-bit arithmetic overflow";
-   end Raise_Error;
-
-   -------------------
-   -- Scaled_Divide --
-   -------------------
-
-   procedure Scaled_Divide
-     (X, Y, Z : Int64;
-      Q, R    : out Int64;
-      Round   : Boolean)
-   is
-      Xu  : constant Uns64 := abs X;
-      Xhi : constant Uns32 := Hi (Xu);
-      Xlo : constant Uns32 := Lo (Xu);
-
-      Yu  : constant Uns64 := abs Y;
-      Yhi : constant Uns32 := Hi (Yu);
-      Ylo : constant Uns32 := Lo (Yu);
-
-      Zu  : Uns64 := abs Z;
-      Zhi : Uns32 := Hi (Zu);
-      Zlo : Uns32 := Lo (Zu);
-
-      D : array (1 .. 4) of Uns32;
-      --  The dividend, four digits (D(1) is high order)
-
-      Qd : array (1 .. 2) of Uns32;
-      --  The quotient digits, two digits (Qd(1) is high order)
-
-      S1, S2, S3 : Uns32;
-      --  Value to subtract, three digits (S1 is high order)
-
-      Qu : Uns64;
-      Ru : Uns64;
-      --  Unsigned quotient and remainder
-
-      Scale : Natural;
-      --  Scaling factor used for multiple-precision divide. Dividend and
-      --  Divisor are multiplied by 2 ** Scale, and the final remainder is
-      --  divided by the scaling factor. The reason for this scaling is to
-      --  allow more accurate estimation of quotient digits.
-
-      T1, T2, T3 : Uns64;
-      --  Temporary values
-
-   begin
-      --  First do the multiplication, giving the four digit dividend
-
-      T1 := Xlo * Ylo;
-      D (4) := Lo (T1);
-      D (3) := Hi (T1);
-
-      if Yhi /= 0 then
-         T1 := Xlo * Yhi;
-         T2 := D (3) + Lo (T1);
-         D (3) := Lo (T2);
-         D (2) := Hi (T1) + Hi (T2);
-
-         if Xhi /= 0 then
-            T1 := Xhi * Ylo;
-            T2 := D (3) + Lo (T1);
-            D (3) := Lo (T2);
-            T3 := D (2) + Hi (T1);
-            T3 := T3 + Hi (T2);
-            D (2) := Lo (T3);
-            D (1) := Hi (T3);
-
-            T1 := (D (1) & D (2)) + Uns64'(Xhi * Yhi);
-            D (1) := Hi (T1);
-            D (2) := Lo (T1);
-
-         else
-            D (1) := 0;
-         end if;
-
-      else
-         if Xhi /= 0 then
-            T1 := Xhi * Ylo;
-            T2 := D (3) + Lo (T1);
-            D (3) := Lo (T2);
-            D (2) := Hi (T1) + Hi (T2);
-
-         else
-            D (2) := 0;
-         end if;
-
-         D (1) := 0;
-      end if;
-
-      --  Now it is time for the dreaded multiple precision division. First an
-      --  easy case, check for the simple case of a one digit divisor.
-
-      if Zhi = 0 then
-         if D (1) /= 0 or else D (2) >= Zlo then
-            Raise_Error;
-
-         --  Here we are dividing at most three digits by one digit
-
-         else
-            T1 := D (2) & D (3);
-            T2 := Lo (T1 rem Zlo) & D (4);
-
-            Qu := Lo (T1 / Zlo) & Lo (T2 / Zlo);
-            Ru := T2 rem Zlo;
-         end if;
-
-      --  If divisor is double digit and too large, raise error
-
-      elsif (D (1) & D (2)) >= Zu then
-         Raise_Error;
-
-      --  This is the complex case where we definitely have a double digit
-      --  divisor and a dividend of at least three digits. We use the classical
-      --  multiple division algorithm (see section (4.3.1) of Knuth's "The Art
-      --  of Computer Programming", Vol. 2 for a description (algorithm D).
-
-      else
-         --  First normalize the divisor so that it has the leading bit on.
-         --  We do this by finding the appropriate left shift amount.
-
-         Scale := 0;
-
-         if (Zhi and 16#FFFF0000#) = 0 then
-            Scale := 16;
-            Zu := Shift_Left (Zu, 16);
-         end if;
-
-         if (Hi (Zu) and 16#FF00_0000#) = 0 then
-            Scale := Scale + 8;
-            Zu := Shift_Left (Zu, 8);
-         end if;
-
-         if (Hi (Zu) and 16#F000_0000#) = 0 then
-            Scale := Scale + 4;
-            Zu := Shift_Left (Zu, 4);
-         end if;
-
-         if (Hi (Zu) and 16#C000_0000#) = 0 then
-            Scale := Scale + 2;
-            Zu := Shift_Left (Zu, 2);
-         end if;
-
-         if (Hi (Zu) and 16#8000_0000#) = 0 then
-            Scale := Scale + 1;
-            Zu := Shift_Left (Zu, 1);
-         end if;
-
-         Zhi := Hi (Zu);
-         Zlo := Lo (Zu);
-
-         --  Note that when we scale up the dividend, it still fits in four
-         --  digits, since we already tested for overflow, and scaling does
-         --  not change the invariant that (D (1) & D (2)) >= Zu.
-
-         T1 := Shift_Left (D (1) & D (2), Scale);
-         D (1) := Hi (T1);
-         T2 := Shift_Left (0 & D (3), Scale);
-         D (2) := Lo (T1) or Hi (T2);
-         T3 := Shift_Left (0 & D (4), Scale);
-         D (3) := Lo (T2) or Hi (T3);
-         D (4) := Lo (T3);
-
-         --  Loop to compute quotient digits, runs twice for Qd(1) and Qd(2)
-
-         for J in 0 .. 1 loop
-
-            --  Compute next quotient digit. We have to divide three digits by
-            --  two digits. We estimate the quotient by dividing the leading
-            --  two digits by the leading digit. Given the scaling we did above
-            --  which ensured the first bit of the divisor is set, this gives
-            --  an estimate of the quotient that is at most two too high.
-
-            Qd (J + 1) := (if D (J + 1) = Zhi
-                           then 2 ** 32 - 1
-                           else Lo ((D (J + 1) & D (J + 2)) / Zhi));
-
-            --  Compute amount to subtract
-
-            T1 := Qd (J + 1) * Zlo;
-            T2 := Qd (J + 1) * Zhi;
-            S3 := Lo (T1);
-            T1 := Hi (T1) + Lo (T2);
-            S2 := Lo (T1);
-            S1 := Hi (T1) + Hi (T2);
-
-            --  Adjust quotient digit if it was too high
-
-            loop
-               exit when Le3 (S1, S2, S3, D (J + 1), D (J + 2), D (J + 3));
-               Qd (J + 1) := Qd (J + 1) - 1;
-               Sub3 (S1, S2, S3, 0, Zhi, Zlo);
-            end loop;
-
-            --  Now subtract S1&S2&S3 from D1&D2&D3 ready for next step
-
-            Sub3 (D (J + 1), D (J + 2), D (J + 3), S1, S2, S3);
-         end loop;
-
-         --  The two quotient digits are now set, and the remainder of the
-         --  scaled division is in D3&D4. To get the remainder for the
-         --  original unscaled division, we rescale this dividend.
-
-         --  We rescale the divisor as well, to make the proper comparison
-         --  for rounding below.
-
-         Qu := Qd (1) & Qd (2);
-         Ru := Shift_Right (D (3) & D (4), Scale);
-         Zu := Shift_Right (Zu, Scale);
-      end if;
-
-      --  Deal with rounding case
-
-      if Round and then Ru > (Zu - Uns64'(1)) / Uns64'(2) then
-         Qu := Qu + Uns64 (1);
-      end if;
-
-      --  Set final signs (RM 4.5.5(27-30))
-
-      --  Case of dividend (X * Y) sign positive
-
-      if (X >= 0 and then Y >= 0) or else (X < 0 and then Y < 0) then
-         R := To_Pos_Int (Ru);
-         Q := (if Z > 0 then To_Pos_Int (Qu) else To_Neg_Int (Qu));
-
-      --  Case of dividend (X * Y) sign negative
-
-      else
-         R := To_Neg_Int (Ru);
-         Q := (if Z > 0 then To_Neg_Int (Qu) else To_Pos_Int (Qu));
-      end if;
-   end Scaled_Divide;
-
-   ----------
-   -- Sub3 --
-   ----------
-
-   procedure Sub3 (X1, X2, X3 : in out Uns32; Y1, Y2, Y3 : Uns32) is
-   begin
-      if Y3 > X3 then
-         if X2 = 0 then
-            X1 := X1 - 1;
-         end if;
-
-         X2 := X2 - 1;
-      end if;
-
-      X3 := X3 - Y3;
-
-      if Y2 > X2 then
-         X1 := X1 - 1;
-      end if;
-
-      X2 := X2 - Y2;
-      X1 := X1 - Y1;
-   end Sub3;
-
-   -------------------------------
-   -- Subtract_With_Ovflo_Check --
-   -------------------------------
-
-   function Subtract_With_Ovflo_Check (X, Y : Int64) return Int64 is
-      R : constant Int64 := To_Int (To_Uns (X) - To_Uns (Y));
-
-   begin
-      if X >= 0 then
-         if Y > 0 or else R >= 0 then
-            return R;
-         end if;
-
-      else -- X < 0
-         if Y <= 0 or else R < 0 then
-            return R;
-         end if;
-      end if;
-
-      Raise_Error;
-   end Subtract_With_Ovflo_Check;
-
-   ----------------
-   -- To_Neg_Int --
-   ----------------
-
-   function To_Neg_Int (A : Uns64) return Int64 is
-      R : constant Int64 := (if A = 2**63 then Int64'First else -To_Int (A));
-      --  Note that we can't just use the expression of the Else, because it
-      --  overflows for A = 2**63.
-   begin
-      if R <= 0 then
-         return R;
-      else
-         Raise_Error;
-      end if;
-   end To_Neg_Int;
-
-   ----------------
-   -- To_Pos_Int --
-   ----------------
-
-   function To_Pos_Int (A : Uns64) return Int64 is
-      R : constant Int64 := To_Int (A);
-   begin
-      if R >= 0 then
-         return R;
-      else
-         Raise_Error;
-      end if;
-   end To_Pos_Int;
-
-end System.Arith_64;