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43 lines
1.6 KiB
C
43 lines
1.6 KiB
C
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/* Definitions for memory copy functions, PA-RISC version.
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Copyright (C) 2023 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 <sysdeps/generic/memcopy.h>
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/* Use a single double-word shift instead of two shifts and an ior.
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If the uses of MERGE were close to the computation of shl/shr,
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the compiler might have been able to create this itself.
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But instead that computation is well separated.
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Using an inline function instead of a macro is the easiest way
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to ensure that the types are correct. */
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#undef MERGE
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static __always_inline op_t
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MERGE (op_t w0, int shl, op_t w1, int shr)
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{
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_Static_assert (OPSIZ == 4 || OPSIZ == 8, "Invalid OPSIZE");
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op_t res;
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if (OPSIZ == 4)
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asm ("shrpw %1,%2,%%sar,%0" : "=r"(res) : "r"(w0), "r"(w1), "q"(shr));
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else if (OPSIZ == 8)
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asm ("shrpd %1,%2,%%sar,%0" : "=r"(res) : "r"(w0), "r"(w1), "q"(shr));
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return res;
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}
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