[thirdparty/glibc.git] / sysdeps / aarch64 / multiarch / memset_emag.S

/* Optimized memset for AmpereComputing emag processor.
   Copyright (C) 2018 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
   <https://www.gnu.org/licenses/>.  */

#if IS_IN (libc)
# define MEMSET __memset_emag

/*
 * Using DC ZVA to zero memory does not produce better performance if
 * memory size is not very large, especially when there are multiple
 * processes/threads contending memory/cache. Here we set threshold to
 * zero to disable using DC ZVA, which is good for multi-process/thread
 * workloads.
 */

# define DC_ZVA_THRESHOLD 0

# include "./memset_base64.S"
#endif
Commit	Line	Data
c7d3890f FX	1	/* Optimized memset for AmpereComputing emag processor.
	2	Copyright (C) 2018 Free Software Foundation, Inc.
	3
	4	This file is part of the GNU C Library.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public
	17	License along with the GNU C Library. If not, see
5a82c748	18	<https://www.gnu.org/licenses/>. */
c7d3890f FX	19
	20	#if IS_IN (libc)
	21	# define MEMSET __memset_emag
	22
	23	/*
b68fabfb	24	* Using DC ZVA to zero memory does not produce better performance if
c7d3890f	25	* memory size is not very large, especially when there are multiple
b68fabfb FX	26	* processes/threads contending memory/cache. Here we set threshold to
	27	* zero to disable using DC ZVA, which is good for multi-process/thread
	28	* workloads.
	29	*/
	30
	31	# define DC_ZVA_THRESHOLD 0
c7d3890f FX	32
	33	# include "./memset_base64.S"
	34	#endif