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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/lib/libc/powerpc64/string/memcpy_vsx.S
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/*-

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 * Copyright (c) 2018 Instituto de Pesquisas Eldorado

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 * All rights reserved.

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 * 3. Neither the name of the author nor the names of its contributors may

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 *    be used to endorse or promote products derived from this software

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#define FN_NAME			__memcpy_vsx

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#define BLOCK_BITS		6

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#define	ALIGN_MASK		0xf

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/*

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 * r5: bytes to copy (multiple of BLOCK_BYTES)

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 *

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 */

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#define FN_COPY_LOOP \

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	/* Load CTR with number of blocks */		 \

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	srdi	%r5, %r5, BLOCK_BITS			;\

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	mtctr	%r5					;\

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	/* Prepare indexes to load and store data */	 \

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	xor	%r6, %r6, %r6				;\

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	li	%r9,  16				;\

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	li	%r10, 32				;\

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	li	%r11, 48				;\

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.Lcopy_vsx_loop:					 \

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	lxvd2x	%vs6, %r6,  %r4				;\

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	lxvd2x	%vs7, %r9,  %r4				;\

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	lxvd2x	%vs8, %r10, %r4				;\

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	lxvd2x	%vs9, %r11, %r4				;\

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	stxvd2x	%vs6, %r6,  %r3				;\

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	stxvd2x	%vs7, %r9,  %r3				;\

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	stxvd2x	%vs8, %r10, %r3				;\

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	stxvd2x	%vs9, %r11, %r3				;\

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							 \

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	addi	%r3, %r3, BLOCK_BYTES			;\

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	addi	%r4, %r4, BLOCK_BYTES			;\

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	bdnz	.Lcopy_vsx_loop				;\

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							 \

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	/* Check if there is remaining bytes */		 \

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	cmpd	%r7, 0					;\

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	beq		.Lexit				;\

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#include "memcpy.S"

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