Blame sysdeps/s390/fpu/s_roundevenf.c

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/* roundevenf() - S390 version.
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   Copyright (C) 2019 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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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
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   published by the Free Software Foundation; either version 2.1 of the
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   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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   <https://www.gnu.org/licenses/>.  */
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#ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT
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# include <math.h>
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# include <libm-alias-float.h>
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float
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__roundevenf (float x)
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{
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  float y;
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  /* The z196 zarch "load fp integer" (fiebra) instruction is rounding
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     x to the nearest integer with "ties to even" rounding mode
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     (M3-field: 4) where inexact exceptions are suppressed (M4-field: 4).  */
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  __asm__ ("fiebra %0,4,%1,4" : "=f" (y) : "f" (x));
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  return y;
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}
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libm_alias_float (__roundeven, roundeven)
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#else
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# include <sysdeps/ieee754/flt-32/s_roundevenf.c>
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#endif