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bdf20beac1
sparc64 passes floating point values in the floating point registers. As the the generic ceil, floor and trunc functions use integer instructions, it makes sense to provide a VIS3 version consisting in the the generic version compiled with -mvis3. GCC will then use movdtox, movxtod, movwtos and movstow instructions. sparc32 passes the floating point values in the integer registers, so it doesn't make sense to do the same. Changelog: * sysdeps/ieee754/dbl-64/s_trunc.c: Avoid alias renamed. * sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c: Likewise. * sysdeps/ieee754/flt-32/s_truncf.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/Makefile [$(subdir) = math && $(have-as-vis3) = yes] (libm-sysdep_routines): Add s_ceilf-vis3, s_ceil-vis3, s_floorf-vis3, s_floor-vis3, s_truncf-vis3, s_trunc-vis3. (CFLAGS-s_ceilf-vis3.c): New. Set to -Wa,-Av9d -mvis3. (CFLAGS-s_ceil-vis3.c): Likewise. (CFLAGS-s_floorf-vis3.c): Likewise. (CFLAGS-s_floor-vis3.c): Likewise. (CFLAGS-s_truncf-vis3.c): Likewise. (CFLAGS-s_trunc-vis3.c): Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_ceil-vis3.c: New file. * sysdeps/sparc/sparc64/fpu/multiarch/s_ceil.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf-vis3.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_floor-vis3.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_floor.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_floorf-vis3.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_floorf.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c: Likewise.
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/* Truncate argument to nearest integral value not larger than the argument.
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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 <math.h>
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#include <math_private.h>
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double
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__trunc (double x)
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{
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int32_t i0, j0;
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u_int32_t i1;
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int sx;
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EXTRACT_WORDS (i0, i1, x);
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sx = i0 & 0x80000000;
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j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
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if (j0 < 20)
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{
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if (j0 < 0)
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/* The magnitude of the number is < 1 so the result is +-0. */
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INSERT_WORDS (x, sx, 0);
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else
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INSERT_WORDS (x, sx | (i0 & ~(0x000fffff >> j0)), 0);
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}
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else if (j0 > 51)
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{
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if (j0 == 0x400)
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/* x is inf or NaN. */
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return x + x;
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}
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else
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{
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INSERT_WORDS (x, i0, i1 & ~(0xffffffffu >> (j0 - 20)));
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}
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return x;
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}
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#ifndef __trunc
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weak_alias (__trunc, trunc)
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# ifdef NO_LONG_DOUBLE
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strong_alias (__trunc, __truncl)
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weak_alias (__trunc, truncl)
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# endif
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#endif
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