2011-12-17 19:59:47 +00:00
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/* Round to int floating-point values. PowerPC64 version.
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2014-01-01 11:03:15 +00:00
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Copyright (C) 2011-2014 Free Software Foundation, Inc.
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2011-12-17 19:59:47 +00:00
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This file is part of the GNU C Library.
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Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011
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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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2012-02-09 23:18:22 +00:00
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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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2011-12-17 19:59:47 +00:00
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/* This has been coded in assembler because GCC makes such a mess of it
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when it's coded in C. */
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#include <sysdep.h>
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#include <math_ldbl_opt.h>
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/* double [fp1] nearbyint(double [fp1] x) */
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.section ".toc","aw"
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.LC0: /* 2**52 */
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.tc FD_43300000_0[TC],0x4330000000000000
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.section ".text"
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EALIGN (__nearbyint, 4, 0)
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CALL_MCOUNT 0
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fabs fp0,fp1
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lfd fp13,.LC0@toc(2)
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fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52) */
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bgelr cr7
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fsub fp12,fp13,fp13 /* generate 0.0 */
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fcmpu cr7,fp1,fp12 /* if (x > 0.0) */
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ble cr7, L(lessthanzero)
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mtfsb0 4*cr7+lt /* Disable FE_INEXACT exception */
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fadd fp1,fp1,fp13 /* x+= TWO52 */
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fsub fp1,fp1,fp13 /* x-= TWO52 */
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fabs fp1,fp1 /* if (x == 0.0) */
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mtfsb0 4*cr1+eq /* Clear any FE_INEXACT exception */
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blr /* x = 0.0; */
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L(lessthanzero):
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bgelr cr7 /* if (x < 0.0) */
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mtfsb0 4*cr7+lt
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fsub fp1,fp1,fp13 /* x -= TWO52 */
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fadd fp1,fp1,fp13 /* x += TWO52 */
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fnabs fp1,fp1 /* if (x == 0.0) */
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mtfsb0 4*cr1+eq
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blr /* x = -0.0; */
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END (__nearbyint)
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weak_alias (__nearbyint, nearbyint)
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#ifdef NO_LONG_DOUBLE
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weak_alias (__nearbyint, nearbyint)
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strong_alias (__nearbyint, __nearbyintl)
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#endif
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2012-04-30 23:10:20 +00:00
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#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
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compat_symbol (libm, __nearbyint, nearbyintl, GLIBC_2_1)
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2011-12-17 19:59:47 +00:00
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#endif
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