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be836d91 | 1 | /* Definitions for memory copy functions, PA-RISC version. |
dff8da6b | 2 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
be836d91 RH |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library. If not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <sysdeps/generic/memcopy.h> | |
20 | ||
21 | /* Use a single double-word shift instead of two shifts and an ior. | |
22 | If the uses of MERGE were close to the computation of shl/shr, | |
23 | the compiler might have been able to create this itself. | |
24 | But instead that computation is well separated. | |
25 | ||
26 | Using an inline function instead of a macro is the easiest way | |
27 | to ensure that the types are correct. */ | |
28 | ||
29 | #undef MERGE | |
30 | ||
31 | static __always_inline op_t | |
32 | MERGE (op_t w0, int shl, op_t w1, int shr) | |
33 | { | |
34 | _Static_assert (OPSIZ == 4 || OPSIZ == 8, "Invalid OPSIZE"); | |
35 | ||
36 | op_t res; | |
37 | if (OPSIZ == 4) | |
38 | asm ("shrpw %1,%2,%%sar,%0" : "=r"(res) : "r"(w0), "r"(w1), "q"(shr)); | |
39 | else if (OPSIZ == 8) | |
40 | asm ("shrpd %1,%2,%%sar,%0" : "=r"(res) : "r"(w0), "r"(w1), "q"(shr)); | |
41 | return res; | |
42 | } |