alpha: Remove round and roundf implementations

Two bugs in these implementations: First is that the add of 0.5
was not done in chopped rounding mode (easily fixable).  Second
is that the method generates incorrect inexact exceptions for
small integral values (not easily fixable).

diff --git a/ChangeLog b/ChangeLog
index 9170174..87b7a93 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2014-07-03  Richard Henderson  <rth@redhat.com>
 
+       * sysdeps/alpha/fpu/s_round.c: Remove file.
+       * sysdeps/alpha/fpu/s_roundf.c: Remove file.
+
        * elf/dl-support.c (HP_TIMING_AVAIL): Do not redefine.
        (_dl_non_dynamic_init): Check HP_SMALL_TIMING_AVAIL instead.
        * elf/rtld.c (HP_TIMING_AVAIL): Do not redefine.

diff --git a/sysdeps/alpha/fpu/s_round.c b/sysdeps/alpha/fpu/s_round.c
deleted file mode 100644 (file)
index 62a8e72..0000000
--- a/sysdeps/alpha/fpu/s_round.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/* Copyright (C) 2007-2014 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#include <math.h>
-#include <math_ldbl_opt.h>
-
-
-double
-__round (double x)
-{
-  const double almost_half = 0x1.fffffffffffffp-2;
-  const double two52 = 0x1.0p52;
-  double tmp, r;
-
-  __asm (
-#ifdef _IEEE_FP_INEXACT
-        "addt/suic %2, %3, %1\n\tsubt/suic %1, %3, %0"
-#else
-        "addt/suc %2, %3, %1\n\tsubt/suc %1, %3, %0"
-#endif
-        : "=&f"(r), "=&f"(tmp)
-        : "f"(fabs (x) + almost_half), "f"(two52));
-
-  return copysign (r, x);
-}
-
-weak_alias (__round, round)
-#ifdef NO_LONG_DOUBLE
-strong_alias (__round, __roundl)
-weak_alias (__roundl, roundl)
-#endif
-#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
-compat_symbol (libm, __round, roundl, GLIBC_2_1);
-#endif

diff --git a/sysdeps/alpha/fpu/s_roundf.c b/sysdeps/alpha/fpu/s_roundf.c
deleted file mode 100644 (file)
index a07ffa3..0000000
--- a/sysdeps/alpha/fpu/s_roundf.c
+++ /dev/null
@@ -1,43 +0,0 @@
-/* Copyright (C) 2007-2014 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Richard Henderson.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#include <math.h>
-
-
-float
-__roundf (float x)
-{
-  const float almost_half = 0x1.fffffep-2;
-  const float two23 = 0x1.0p23;
-  float r, tmp;
-
-  __asm (
-#ifdef _IEEE_FP_INEXACT
-        "adds/suic %2, %3, %1\n\tsubs/suic %1, %3, %0"
-#else
-        "adds/suc %2, %3, %1\n\tsubs/suc %1, %3, %0"
-#endif
-        : "=&f"(r), "=&f"(tmp)
-        : "f"(fabsf (x) + almost_half), "f"(two23));
-
-  /* round(-0) == -0, and in general we'll always have the same
-     sign as our input.  */
-  return copysignf (r, x);
-}
-
-weak_alias (__roundf, roundf)