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e16c18650c
For copies shorter than 512 bytes, the data is copied using plain ld/std instructions. For 512 bytes or more, the copy is done in 3 phases: Phase 1: copy from the src buffer until it's aligned at a 16-byte boundary Phase 2: copy as many aligned 64-byte blocks from the src buffer as possible Phase 3: copy the remaining data, if any In phase 2, this code uses VSX instructions when available. Otherwise, it uses ldx/stdx. Submitted by: Luis Pires <lffpires_ruabrasil.org> (original version) Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D15118
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*-
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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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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <machine/cpu.h>
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#include <machine/ifunc.h>
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#define _CAT(a,b) a##b
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#define CAT(a,b) _CAT(a,b)
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#define CAT3(a,b,c) CAT(CAT(a,b),c)
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#ifdef MEMCOPY
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#define FN_NAME memcpy
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#define FN_RET void *
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#define FN_PARAMS (void *dst, const void *src, size_t len)
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#elif defined(MEMMOVE)
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#define FN_NAME memmove
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#define FN_RET void *
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#define FN_PARAMS (void *dst, const void *src, size_t len)
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#else
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#define FN_NAME bcopy
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#define FN_RET void
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#define FN_PARAMS (const void *src, void *dst, size_t len)
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#endif
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#define FN_NAME_NOVSX CAT(__, FN_NAME)
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#define FN_NAME_VSX CAT3(__, FN_NAME, _vsx)
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FN_RET FN_NAME_NOVSX FN_PARAMS;
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FN_RET FN_NAME_VSX FN_PARAMS;
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DEFINE_UIFUNC(, FN_RET, FN_NAME, FN_PARAMS)
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{
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if (cpu_features & PPC_FEATURE_HAS_VSX)
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return (FN_NAME_VSX);
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else
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return (FN_NAME_NOVSX);
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}
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