48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/* Move half-word library function.
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Copyright (C) 2000-2020 Free Software Foundation, Inc.
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Contributed by Red Hat, Inc.
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This file is part of GCC.
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GCC is free software ; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC 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
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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void
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__cmovh (short *dest, const short *src, unsigned len)
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{
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unsigned i;
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unsigned num = len >> 1;
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char *dest_byte = (char *)dest;
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const char *src_byte = (const char *)src;
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if (dest_byte < src_byte || dest_byte > src_byte+len)
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{
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for (i = 0; i < num; i++)
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dest[i] = src[i];
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if ((len & 1) != 0)
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dest_byte[len-1] = src_byte[len-1];
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}
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else
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{
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while (len-- > 0)
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dest_byte[len] = src_byte[len];
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}
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}
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