90588f58ae
git-svn-id: http://svn.lfbs.rwth-aachen.de/svn/scc/trunk/MetalSVM@55 315a16e6-25f9-4109-90ae-ca3045a26c18
67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/*
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* Copyright 2010 Stefan Lankes, Chair for Operating Systems,
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* RWTH Aachen University
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of MetalSVM.
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*/
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#ifndef __ARCH_STRING_H__
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#define __ARCH_STRING_H__
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#include <metalsvm/stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef HAVE_ARCH_MEMCPY
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inline static void *memcpy(void *dest, const void *src, size_t count)
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{
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int32_t i, j, k;
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if (BUILTIN_EXPECT(!dest || !src, 0))
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return dest;
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asm volatile (
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"rep ; movsl\n\t"
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"movl %4, %%ecx\n\t"
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"andl $3, %%ecx\n\t"
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"rep ; movsb\n\t"
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: "=&c"(i), "=&D"(j), "=&S"(k)
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: "0"(count/4), "g"(count), "1"(dest), "2"(src) : "memory");
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return dest;
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}
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#endif
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#ifdef HAVE_ARCH_MEMSET
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inline static void *memset(void *dest, int val, size_t count)
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{
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int32_t i, j;
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if (BUILTIN_EXPECT(!dest, 0))
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return dest;
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asm volatile ("rep ; stosb" : "=&c"(i), "=&D"(j) : "a"(val), "1"(dest), "0"(count) : "memory");
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return dest;
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}
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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