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54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/* Set current rounding direction.
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Copyright (C) 2004-2012 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
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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 <fenv.h>
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#include <fpu_control.h>
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#include <arm-features.h>
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int
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fesetround (int round)
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{
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if (ARM_HAVE_VFP)
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{
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fpu_control_t temp;
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switch (round)
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{
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case FE_TONEAREST:
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case FE_UPWARD:
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case FE_DOWNWARD:
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case FE_TOWARDZERO:
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_FPU_GETCW (temp);
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temp = (temp & ~FE_TOWARDZERO) | round;
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_FPU_SETCW (temp);
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return 0;
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default:
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return 1;
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}
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}
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else if (round == FE_TONEAREST)
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/* This is the only supported rounding mode for soft-fp. */
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return 0;
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/* Unsupported, so fail. */
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return 1;
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}
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libm_hidden_def (fesetround)
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