[Bug math/15479] ceil, floor and round and trunc raise inexact exception

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=15479

--- Comment #7 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "GNU C Library master sources".

The branch, master has been updated
       via  b4d80349bb8b91fd64d6e860af5c0bd503b15f97 (commit)
      from  1f921a93e4fd0b5ccd18a3e7d5a0511bcd2464fa (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b4d80349bb8b91fd64d6e860af5c0bd503b15f97

commit b4d80349bb8b91fd64d6e860af5c0bd503b15f97
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed May 25 17:42:22 2016 +0000

    Do not raise "inexact" from powerpc64 ceil, floor, trunc (bug 15479).

    Continuing fixes for ceil, floor and trunc functions not to raise the
    "inexact" exception, this patch fixes the versions used on older
    powerpc64 processors.  As was done with the round implementations some
    time ago, the save of floating-point state is moved after the first
    floating-point operation on the input to ensure that any "invalid"
    exception from signaling NaN input is included in the saved state, and
    then the whole state gets restored rather than just the rounding mode.

    This has no effect on configurations using the power5+ code, since
    such processors can do these operations with a single instruction (and
    those instructions do not set "inexact", so are correct for TS 18661-1
    semantics).

    Tested for powerpc64.

        [BZ #15479]
        * sysdeps/powerpc/powerpc64/fpu/s_ceil.S (__ceil): Move save of
        floating-point state after first floating-point operation on
        input.  Restore full floating-point state instead of just rounding
        mode.
        * sysdeps/powerpc/powerpc64/fpu/s_ceilf.S (__ceilf): Likewise.
        * sysdeps/powerpc/powerpc64/fpu/s_floor.S (__floor): Likewise.
        * sysdeps/powerpc/powerpc64/fpu/s_floorf.S (__floorf): Likewise.
        * sysdeps/powerpc/powerpc64/fpu/s_trunc.S (__trunc): Likewise.
        * sysdeps/powerpc/powerpc64/fpu/s_truncf.S (__truncf): Likewise.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                |   11 +++++++++++
 sysdeps/powerpc/powerpc64/fpu/s_ceil.S   |    9 ++++++---
 sysdeps/powerpc/powerpc64/fpu/s_ceilf.S  |    9 ++++++---
 sysdeps/powerpc/powerpc64/fpu/s_floor.S  |    9 ++++++---
 sysdeps/powerpc/powerpc64/fpu/s_floorf.S |    9 ++++++---
 sysdeps/powerpc/powerpc64/fpu/s_trunc.S  |    9 ++++++---
 sysdeps/powerpc/powerpc64/fpu/s_truncf.S |    9 ++++++---
 7 files changed, 47 insertions(+), 18 deletions(-)

-- 
You are receiving this mail because:
You are on the CC list for the bug.