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/*
* Copyright (C) 2015 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* generic C version for any machine */
#include <cutils/memory.h>
void android_memset16(uint16_t* dst, uint16_t value, size_t size)
{
/* optimized version of
size >>= 1;
while (size--)
*dst++ = value;
*/
size >>= 1;
if (((uintptr_t)dst & 2) && size) {
/* fill unpaired first elem separately */
*dst++ = value;
size--;
}
/* dst is now 32-bit-aligned */
/* fill body with 32-bit pairs */
uint32_t value32 = (value << 16) | value;
android_memset32((uint32_t*) dst, value32, size<<1);
if (size & 1) {
dst[size-1] = value; /* fill unpaired last elem */
}
}
void android_memset32(uint32_t* dst, uint32_t value, size_t size)
{
/* optimized version of
size >>= 2;
while (size--)
*dst++ = value;
*/
size >>= 2;
if (((uintptr_t)dst & 4) && size) {
/* fill unpaired first 32-bit elem separately */
*dst++ = value;
size--;
}
/* dst is now 64-bit aligned */
/* fill body with 64-bit pairs */
uint64_t value64 = (((uint64_t)value)<<32) | value;
uint64_t* dst64 = (uint64_t*)dst;
while (size >= 12) {
dst64[0] = value64;
dst64[1] = value64;
dst64[2] = value64;
dst64[3] = value64;
dst64[4] = value64;
dst64[5] = value64;
size -= 12;
dst64 += 6;
}
/* fill remainder with original 32-bit single-elem loop */
dst = (uint32_t*) dst64;
while (size--) {
*dst++ = value;
}
}
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