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/* Definitions for memory copy functions, PA-RISC version.
Copyright (C) 2023-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <sysdeps/generic/memcopy.h>
/* Use a single double-word shift instead of two shifts and an ior.
If the uses of MERGE were close to the computation of shl/shr,
the compiler might have been able to create this itself.
But instead that computation is well separated.
Using an inline function instead of a macro is the easiest way
to ensure that the types are correct. */
#undef MERGE
static __always_inline op_t
MERGE (op_t w0, int shl, op_t w1, int shr)
{
_Static_assert (OPSIZ == 4 || OPSIZ == 8, "Invalid OPSIZE");
op_t res;
if (OPSIZ == 4)
asm ("shrpw %1,%2,%%sar,%0" : "=r"(res) : "r"(w0), "r"(w1), "q"(shr));
else if (OPSIZ == 8)
asm ("shrpd %1,%2,%%sar,%0" : "=r"(res) : "r"(w0), "r"(w1), "q"(shr));
return res;
}
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