[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 --- Comment #9 from Ralf Corsepius corsepiu at gcc dot gnu.org 2012-11-05 11:44:22 UTC --- (In reply to comment #8) H have backported similar change to 4.7 branch. Thanks for the backport. Please reopen the PR if there are still problems. Unfortunately, your patch doesn't seem to help much: GCC-4.7's soft-float still seems to be pulling in fp routine from inside of newlib: ... /opt/rtems-4.11/lib/gcc/i386-rtems4.11/4.7.2/../../../../i386-rtems4.11/lib/soft-float/libc.a(lib_a-svfprintf.o): In function `_svfprintf_r': /builddir/build/BUILD/rtems-4.11-i386-rtems4.11-gcc-4.7.2/build/i386-rtems4.11/soft-float/newlib/libc/stdio/../../../../../../gcc-4.7.2/newlib/libc/stdio/vfprintf.c:1072: undefined reference to `__truncxfdf2' /builddir/build/BUILD/rtems-4.11-i386-rtems4.11-gcc-4.7.2/build/i386-rtems4.11/soft-float/newlib/libc/stdio/../../../../../../gcc-4.7.2/newlib/libc/stdio/vfprintf.c:1084: undefined reference to `__ltdf2' /builddir/build/BUILD/rtems-4.11-i386-rtems4.11-gcc-4.7.2/build/i386-rtems4.11/soft-float/newlib/libc/stdio/../../../../../../gcc-4.7.2/newlib/libc/stdio/vfprintf.c:1556: undefined reference to `__eqdf2' /builddir/build/BUILD/rtems-4.11-i386-rtems4.11-gcc-4.7.2/build/i386-rtems4.11/soft-float/newlib/libc/stdio/../../../../../../gcc-4.7.2/newlib/libc/stdio/vfprintf.c:1603: undefined reference to `__nedf2'
[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 --- Comment #10 from Uros Bizjak ubizjak at gmail dot com 2012-11-05 12:11:53 UTC --- (In reply to comment #9) (In reply to comment #8) H have backported similar change to 4.7 branch. Thanks for the backport. Please reopen the PR if there are still problems. Unfortunately, your patch doesn't seem to help much: GCC-4.7's soft-float still seems to be pulling in fp routine from inside of newlib: This is the other way around: newlib doesn't find libgcc. This is newlib's problem.
[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 --- Comment #11 from Uros Bizjak ubizjak at gmail dot com 2012-11-05 12:28:53 UTC --- (In reply to comment #9) (In reply to comment #8) H have backported similar change to 4.7 branch. Thanks for the backport. Please reopen the PR if there are still problems. Unfortunately, your patch doesn't seem to help much: GCC-4.7's soft-float still seems to be pulling in fp routine from inside of newlib: You should use t-softfp instead of 386/t-softfp for i[34567]86-*-rtems* in libgcc/config.host. In fact, there should be no i386/t-softfp for any x86 target.
[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 --- Comment #12 from Ralf Corsepius corsepiu at gcc dot gnu.org 2012-11-05 12:41:56 UTC --- (In reply to comment #11) You should use t-softfp instead of 386/t-softfp for i[34567]86-*-rtems* in libgcc/config.host. In fact, there should be no i386/t-softfp for any x86 target. You mean, we should apply a patch similar to this? --- a/libgcc/config.host +++ b/libgcc/config.host @@ -568,7 +568,7 @@ i[34567]86-*-nto-qnx*) extra_parts=crtbegin.o ;; i[34567]86-*-rtems*) - tmake_file=$tmake_file i386/t-softfp i386/t-crtstuff + tmake_file=$tmake_file i386/t-crtstuff extra_parts=$extra_parts crti.o crtn.o ;; i[34567]86-*-solaris2* | x86_64-*-solaris2.1[0-9]*) @@ -1165,6 +1165,7 @@ i[34567]86-*-darwin* | x86_64-*-darwin* | \ i[34567]86-*-kfreebsd*-gnu | x86_64-*-kfreebsd*-gnu | \ i[34567]86-*-linux* | x86_64-*-linux* | \ i[34567]86-*-gnu* | \ + i[34567]86-*-rtems* | \ i[34567]86-*-solaris2* | x86_64-*-solaris2.1[0-9]* | \ i[34567]86-*-cygwin* | i[34567]86-*-mingw* | x86_64-*-mingw* | \ i[34567]86-*-freebsd* | x86_64-*-freebsd*) The breakdown above is with this patch applied.
[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 --- Comment #13 from Uros Bizjak ubizjak at gmail dot com 2012-11-05 14:15:16 UTC --- (In reply to comment #12) You should use t-softfp instead of 386/t-softfp for i[34567]86-*-rtems* in libgcc/config.host. In fact, there should be no i386/t-softfp for any x86 target. You mean, we should apply a patch similar to this? Yes. The breakdown above is with this patch applied. Then the problem is either in newlib or generic libgcc configury. Anyway, original problem with soft-fp was fixed.
[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 --- Comment #14 from Uros Bizjak ubizjak at gmail dot com 2012-11-05 14:24:43 UTC --- (In reply to comment #13) Then the problem is either in newlib or generic libgcc configury. Please note that t-fdpbit is not enabled by default for x86 anymore. I don't know if this was intentional omission during libgcc conversion, but nobody missed it until today. The second part of your patch enables TFmode soft-float, probably not needed for RTEMS. I think that you need either t-fdpbit or t-softfp-sfdf added to i[34567]86-*-rtems*)
[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 --- Comment #15 from Ralf Corsepius corsepiu at gcc dot gnu.org 2012-11-05 14:38:44 UTC --- (In reply to comment #14) (In reply to comment #13) Then the problem is either in newlib or generic libgcc configury. I meanwhile came to the latter conclusion. The math calls are being pulled-in by gcc's code generation from inside of newlib's libm, but soft-fp emulation is missing in libgcc. As we have both hard and soft-float multilib variants, I think RTEMS needs a softfp wrapper. Please note that t-fdpbit is not enabled by default for x86 anymore. I don't know if this was intentional omission during libgcc conversion, but nobody missed it until today. OK, will check. The second part of your patch enables TFmode soft-float, probably not needed for RTEMS. I think that you need either t-fdpbit or t-softfp-sfdf added to i[34567]86-*-rtems*) Thanks for these hints - I am currently investigating, but ... things like these take _a lot of time_.
[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 --- Comment #7 from uros at gcc dot gnu.org 2012-11-04 18:58:32 UTC --- Author: uros Date: Sun Nov 4 18:58:29 2012 New Revision: 193140 URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=193140 Log: PR target/55175 * config/i386/32/sfp-machine.h: Guard exception handling and rounding handling code with _SOFT_FLOAT. * config/i386/64/sfp-machine.h: Ditto. Modified: branches/gcc-4_7-branch/libgcc/ChangeLog branches/gcc-4_7-branch/libgcc/config/i386/32/sfp-machine.h branches/gcc-4_7-branch/libgcc/config/i386/64/sfp-machine.h
[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 --- Comment #8 from Uros Bizjak ubizjak at gmail dot com 2012-11-04 18:59:53 UTC --- (In reply to comment #6) I can confirm i386-rtems4.11-gcc now builds. @Uros: I am inclined to believe this patch probably should be backported to 4.7.x. H have backported similar change to 4.7 branch. Please reopen the PR if there are still problems.
[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 Uros Bizjak ubizjak at gmail dot com changed: What|Removed |Added Target Milestone|4.8.0 |4.7.3
[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 --- Comment #6 from Ralf Corsepius corsepiu at gcc dot gnu.org 2012-11-03 06:25:33 UTC --- I can confirm i386-rtems4.11-gcc now builds. @Uros: I am inclined to believe this patch probably should be backported to 4.7.x. At least, RTEMS is facing bizarre compilation issues, which I would not want to be related to similar issues as this.
[Bug target/55175] i386/sfp-exceptions.c:52:7: error: impossible constraint in 'asm'
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55175 Uros Bizjak ubizjak at gmail dot com changed: What|Removed |Added Target||x86 Status|UNCONFIRMED |RESOLVED URL||http://gcc.gnu.org/ml/gcc-p ||atches/2012-11/msg00190.htm ||l Component|bootstrap |target Resolution||FIXED AssignedTo|unassigned at gcc dot |ubizjak at gmail dot com |gnu.org | Target Milestone|--- |4.8.0 --- Comment #5 from Uros Bizjak ubizjak at gmail dot com 2012-11-02 14:26:09 UTC --- Fixed.
