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Use generic fdim on more architectures (bug 6796, bug 20255, bug 20256).
Some architectures have their own versions of fdim functions, which are missing errno setting (bug 6796) and may also return sNaN instead of qNaN for sNaN input, in the case of the x86 / x86_64 long double versions (bug 20256). These versions are not actually doing anything that a compiler couldn't generate, just straightforward comparisons / arithmetic (and, in the x86 / x86_64 case, testing for NaNs with fxam, which isn't actually needed once you use an unordered comparison and let the NaNs pass through the same subtraction as non-NaN inputs). This patch removes the x86 / x86_64 / powerpc versions, so that those architectures use the generic C versions, which correctly handle setting errno and deal properly with sNaN inputs. This seems better than dealing with setting errno in lots of .S versions. The i386 versions also return results with excess range and precision, which is not appropriate for a function exactly defined by reference to IEEE operations. For errno setting to work correctly on overflow, it's necessary to remove excess range with math_narrow_eval, which this patch duly does in the float and double versions so that the tests can reliably pass on x86. For float, this avoids any double rounding issues as the long double precision is more than twice that of float. For double, double rounding issues will need to be addressed separately, so this patch does not fully fix bug 20255. Tested for x86_64, x86 and powerpc. [BZ #6796] [BZ #20255] [BZ #20256] * math/s_fdim.c: Include <math_private.h>. (__fdim): Use math_narrow_eval on result. * math/s_fdimf.c: Include <math_private.h>. (__fdimf): Use math_narrow_eval on result. * sysdeps/i386/fpu/s_fdim.S: Remove file. * sysdeps/i386/fpu/s_fdimf.S: Likewise. * sysdeps/i386/fpu/s_fdiml.S: Likewise. * sysdeps/i386/i686/fpu/s_fdim.S: Likewise. * sysdeps/i386/i686/fpu/s_fdimf.S: Likewise. * sysdeps/i386/i686/fpu/s_fdiml.S: Likewise. * sysdeps/powerpc/fpu/s_fdim.c: Likewise. * sysdeps/powerpc/fpu/s_fdimf.c: Likewise. * sysdeps/powerpc/powerpc32/fpu/s_fdim.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/s_fdim.c: Likewise. * sysdeps/x86_64/fpu/s_fdiml.S: Likewise. * math/libm-test.inc (fdim_test_data): Expect errno setting on overflow. Add sNaN tests.
This commit is contained in:
Joseph Myers
parent
4fea2cda61
commit
f4015c8a86
21
ChangeLog
21
ChangeLog
@ -1,5 +1,26 @@
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2016-06-14 Joseph Myers <joseph@codesourcery.com>
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[BZ #6796]
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[BZ #20255]
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[BZ #20256]
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* math/s_fdim.c: Include <math_private.h>.
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(__fdim): Use math_narrow_eval on result.
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* math/s_fdimf.c: Include <math_private.h>.
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(__fdimf): Use math_narrow_eval on result.
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* sysdeps/i386/fpu/s_fdim.S: Remove file.
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* sysdeps/i386/fpu/s_fdimf.S: Likewise.
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* sysdeps/i386/fpu/s_fdiml.S: Likewise.
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* sysdeps/i386/i686/fpu/s_fdim.S: Likewise.
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* sysdeps/i386/i686/fpu/s_fdimf.S: Likewise.
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* sysdeps/i386/i686/fpu/s_fdiml.S: Likewise.
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* sysdeps/powerpc/fpu/s_fdim.c: Likewise.
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* sysdeps/powerpc/fpu/s_fdimf.c: Likewise.
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* sysdeps/powerpc/powerpc32/fpu/s_fdim.c: Likewise.
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* sysdeps/powerpc/powerpc64/fpu/s_fdim.c: Likewise.
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* sysdeps/x86_64/fpu/s_fdiml.S: Likewise.
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* math/libm-test.inc (fdim_test_data): Expect errno setting on
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overflow. Add sNaN tests.
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* math/s_fdim.c (__fdim): Use islessequal and isinf instead of
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fpclassify.
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* math/s_fdimf.c (__fdimf): Likewise.
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@ -7211,8 +7211,7 @@ static const struct test_ff_f_data fdim_test_data[] =
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TEST_ff_f (fdim, max_value, max_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, -max_value, -max_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, -max_value, max_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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/* Bug 6796: errno setting may be missing. */
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TEST_ff_f (fdim, max_value, -max_value, plus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION),
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TEST_ff_f (fdim, max_value, -max_value, plus_oflow, INEXACT_EXCEPTION|OVERFLOW_EXCEPTION|ERRNO_PLUS_OFLOW),
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TEST_ff_f (fdim, plus_infty, 9, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, plus_infty, -9, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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@ -7229,24 +7228,56 @@ static const struct test_ff_f_data fdim_test_data[] =
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TEST_ff_f (fdim, 0, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, 9, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, -9, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, 0, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, 9, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -9, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, 0, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, 9, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -9, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, qnan_value, 0, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, qnan_value, 9, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, qnan_value, -9, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, -qnan_value, 0, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, -qnan_value, 9, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, -qnan_value, -9, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, snan_value, 0, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, snan_value, 9, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, snan_value, -9, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -snan_value, 0, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -snan_value, 9, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -snan_value, -9, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, plus_infty, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, minus_infty, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, plus_infty, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, minus_infty, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, plus_infty, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, minus_infty, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, plus_infty, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, minus_infty, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, qnan_value, plus_infty, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, qnan_value, minus_infty, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, -qnan_value, plus_infty, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, -qnan_value, minus_infty, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, snan_value, plus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, snan_value, minus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -snan_value, plus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -snan_value, minus_infty, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, qnan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, qnan_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, -qnan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, -qnan_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, snan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, snan_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -snan_value, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -snan_value, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, qnan_value, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, qnan_value, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -qnan_value, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -qnan_value, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, snan_value, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, snan_value, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -snan_value, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, -snan_value, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
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TEST_ff_f (fdim, plus_infty, plus_infty, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_ff_f (fdim, plus_infty, minus_infty, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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@ -19,6 +19,7 @@
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#include <errno.h>
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#include <math.h>
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#include <math_private.h>
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double
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__fdim (double x, double y)
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@ -26,7 +27,7 @@ __fdim (double x, double y)
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if (islessequal (x, y))
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return 0.0;
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double r = x - y;
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double r = math_narrow_eval (x - y);
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if (isinf (r) && !isinf (x) && !isinf (y))
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__set_errno (ERANGE);
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@ -19,6 +19,7 @@
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#include <errno.h>
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#include <math.h>
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#include <math_private.h>
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float
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__fdimf (float x, float y)
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@ -26,7 +27,7 @@ __fdimf (float x, float y)
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if (islessequal (x, y))
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return 0.0f;
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float r = x - y;
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float r = math_narrow_eval (x - y);
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if (isinf (r) && !isinf (x) && !isinf (y))
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__set_errno (ERANGE);
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@ -1,51 +0,0 @@
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/* Compute positive difference.
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Copyright (C) 1997-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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.text
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ENTRY(__fdim)
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fldl 4(%esp) // x
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fldl 12(%esp) // x : y
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fucom %st(1)
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fnstsw
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sahf
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jp 1f
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jc 3f
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fstp %st(1)
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fldz
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jmp 2f
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3: fsubrp %st, %st(1)
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ret
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1: fxam
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fnstsw
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andb $0x45, %ah
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cmpb $0x01, %ah
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je 2f
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fxch
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2: fstp %st(1)
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ret
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END(__fdim)
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weak_alias (__fdim, fdim)
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@ -1,51 +0,0 @@
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/* Compute positive difference.
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Copyright (C) 1997-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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.text
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ENTRY(__fdimf)
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flds 4(%esp) // x
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flds 8(%esp) // x : y
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fucom %st(1)
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fnstsw
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sahf
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jp 1f
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jc 3f
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fstp %st(1)
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fldz
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jmp 2f
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3: fsubrp %st, %st(1)
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ret
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1: fxam
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fnstsw
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andb $0x45, %ah
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cmpb $0x01, %ah
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je 2f
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fxch
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2: fstp %st(1)
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ret
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END(__fdimf)
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weak_alias (__fdimf, fdimf)
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@ -1,51 +0,0 @@
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/* Compute positive difference.
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Copyright (C) 1997-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
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|
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The GNU C Library is free software; you can redistribute it and/or
|
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modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
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version 2.1 of the License, or (at your option) any later version.
|
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|
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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
|
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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.text
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ENTRY(__fdiml)
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fldt 4(%esp) // x
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fldt 16(%esp) // x : y
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fucom %st(1)
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fnstsw
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sahf
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jp 1f
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jc 3f
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fstp %st(1)
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fldz
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jmp 2f
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3: fsubrp %st, %st(1)
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ret
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1: fxam
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fnstsw
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andb $0x45, %ah
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cmpb $0x01, %ah
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je 2f
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|
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fxch
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2: fstp %st(1)
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ret
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END(__fdiml)
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weak_alias (__fdiml, fdiml)
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@ -1,43 +0,0 @@
|
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/* Compute positive difference.
|
||||
Copyright (C) 1997-2016 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||||
|
||||
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 <sysdep.h>
|
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|
||||
.text
|
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ENTRY(__fdim)
|
||||
fldl 4(%esp) // x
|
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fldl 12(%esp) // x : y
|
||||
|
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fucomi %st(1), %st
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jp 1f
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|
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jc 3f
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fstp %st(1)
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fldz
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jmp 2f
|
||||
|
||||
3: fsubrp %st, %st(1)
|
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ret
|
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|
||||
1: fucomi %st(0), %st
|
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fcmovnu %st(1), %st
|
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2: fstp %st(1)
|
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ret
|
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END(__fdim)
|
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weak_alias (__fdim, fdim)
|
||||
@ -1,43 +0,0 @@
|
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/* Compute positive difference.
|
||||
Copyright (C) 1997-2016 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||||
|
||||
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 <sysdep.h>
|
||||
|
||||
.text
|
||||
ENTRY(__fdimf)
|
||||
flds 4(%esp) // x
|
||||
flds 8(%esp) // x : y
|
||||
|
||||
fucomi %st(1), %st
|
||||
jp 1f
|
||||
|
||||
jc 3f
|
||||
fstp %st(1)
|
||||
fldz
|
||||
jmp 2f
|
||||
|
||||
3: fsubrp %st, %st(1)
|
||||
ret
|
||||
|
||||
1: fucomi %st(0), %st
|
||||
fcmovnu %st(1), %st
|
||||
2: fstp %st(1)
|
||||
ret
|
||||
END(__fdimf)
|
||||
weak_alias (__fdimf, fdimf)
|
||||
@ -1,43 +0,0 @@
|
||||
/* Compute positive difference.
|
||||
Copyright (C) 1997-2016 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||||
|
||||
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 <sysdep.h>
|
||||
|
||||
.text
|
||||
ENTRY(__fdiml)
|
||||
fldt 4(%esp) // x
|
||||
fldt 16(%esp) // x : y
|
||||
|
||||
fucomi %st(1), %st
|
||||
jp 1f
|
||||
|
||||
jc 3f
|
||||
fstp %st(1)
|
||||
fldz
|
||||
jmp 2f
|
||||
|
||||
3: fsubrp %st, %st(1)
|
||||
ret
|
||||
|
||||
1: fucomi %st(0), %st
|
||||
fcmovnu %st(1), %st
|
||||
2: fstp %st(1)
|
||||
ret
|
||||
END(__fdiml)
|
||||
weak_alias (__fdiml, fdiml)
|
||||
@ -1,30 +0,0 @@
|
||||
/* Return positive difference between arguments.
|
||||
Copyright (C) 1997-2016 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>
|
||||
|
||||
double
|
||||
__fdim (double x, double y)
|
||||
{
|
||||
return x <= y ? 0 : x - y;
|
||||
}
|
||||
weak_alias (__fdim, fdim)
|
||||
#ifdef NO_LONG_DOUBLE
|
||||
strong_alias (__fdim, __fdiml)
|
||||
weak_alias (__fdim, fdiml)
|
||||
#endif
|
||||
@ -1,26 +0,0 @@
|
||||
/* Return positive difference between arguments.
|
||||
Copyright (C) 1997-2016 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>
|
||||
|
||||
float
|
||||
__fdimf (float x, float y)
|
||||
{
|
||||
return x <= y ? 0 : x - y;
|
||||
}
|
||||
weak_alias (__fdimf, fdimf)
|
||||
@ -1,5 +0,0 @@
|
||||
#include <math_ldbl_opt.h>
|
||||
#include <sysdeps/powerpc/fpu/s_fdim.c>
|
||||
#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
|
||||
compat_symbol (libm, __fdim, fdiml, GLIBC_2_1);
|
||||
#endif
|
||||
@ -1,5 +0,0 @@
|
||||
#include <math_ldbl_opt.h>
|
||||
#include <sysdeps/powerpc/fpu/s_fdim.c>
|
||||
#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
|
||||
compat_symbol (libm, __fdim, fdiml, GLIBC_2_1);
|
||||
#endif
|
||||
@ -1,43 +0,0 @@
|
||||
/* Compute positive difference.
|
||||
Copyright (C) 1997-2016 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||||
|
||||
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 <sysdep.h>
|
||||
|
||||
.text
|
||||
ENTRY(__fdiml)
|
||||
fldt 8(%rsp) // x
|
||||
fldt 24(%rsp) // x : y
|
||||
|
||||
fucomi %st(1), %st
|
||||
jp 1f
|
||||
|
||||
jc 3f
|
||||
fstp %st(1)
|
||||
fldz
|
||||
jmp 2f
|
||||
|
||||
3: fsubrp %st, %st(1)
|
||||
ret
|
||||
|
||||
1: fucomi %st(0), %st
|
||||
fcmovnu %st(1), %st
|
||||
2: fstp %st(1)
|
||||
ret
|
||||
END(__fdiml)
|
||||
weak_alias (__fdiml, fdiml)
|
||||
Loading…
x
Reference in New Issue
Block a user