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arraynative.inl
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arraynative.inl
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
//
// File: ArrayNative.cpp
//
//
// This file contains the native methods that support the Array class
//
#ifndef _ARRAYNATIVE_INL_
#define _ARRAYNATIVE_INL_
#include "gchelpers.inl"
FORCEINLINE void InlinedForwardGCSafeCopyHelper(void *dest, const void *src, size_t len)
{
CONTRACTL
{
NOTHROW;
GC_NOTRIGGER;
MODE_COOPERATIVE;
}
CONTRACTL_END;
_ASSERTE(dest != nullptr);
_ASSERTE(src != nullptr);
_ASSERTE(dest != src);
_ASSERTE(len != 0);
// To be able to copy forwards, the destination buffer cannot start inside the source buffer
_ASSERTE((SIZE_T)dest - (SIZE_T)src >= len);
// Make sure everything is pointer aligned
_ASSERTE(IS_ALIGNED(dest, sizeof(SIZE_T)));
_ASSERTE(IS_ALIGNED(src, sizeof(SIZE_T)));
_ASSERTE(IS_ALIGNED(len, sizeof(SIZE_T)));
_ASSERTE(CheckPointer(dest));
_ASSERTE(CheckPointer(src));
SIZE_T *dptr = (SIZE_T *)dest;
SIZE_T *sptr = (SIZE_T *)src;
while (true)
{
if ((len & sizeof(SIZE_T)) != 0)
{
*dptr = *sptr;
len ^= sizeof(SIZE_T);
if (len == 0)
{
return;
}
++sptr;
++dptr;
}
#if defined(HOST_AMD64) && (defined(_MSC_VER) || defined(__GNUC__))
if ((len & (2 * sizeof(SIZE_T))) != 0)
{
__m128 v = _mm_loadu_ps((float *)sptr);
_mm_storeu_ps((float *)dptr, v);
len ^= 2 * sizeof(SIZE_T);
if (len == 0)
{
return;
}
sptr += 2;
dptr += 2;
}
// Align the destination pointer to 16 bytes for the next set of 16-byte copies
if (((SIZE_T)dptr & sizeof(SIZE_T)) != 0)
{
*dptr = *sptr;
++sptr;
++dptr;
len -= sizeof(SIZE_T);
if (len < 4 * sizeof(SIZE_T))
{
continue;
}
}
// Copy 32 bytes at a time
_ASSERTE(len >= 4 * sizeof(SIZE_T));
do
{
__m128 v = _mm_loadu_ps((float *)sptr);
_mm_store_ps((float *)dptr, v);
v = _mm_loadu_ps((float *)(sptr + 2));
_mm_store_ps((float *)(dptr + 2), v);
sptr += 4;
dptr += 4;
len -= 4 * sizeof(SIZE_T);
} while (len >= 4 * sizeof(SIZE_T));
if (len == 0)
{
return;
}
#else // !(defined(HOST_AMD64) && (defined(_MSC_VER) || defined(__GNUC__)))
if ((len & (2 * sizeof(SIZE_T))) != 0)
{
// Read two values and write two values to hint the use of wide loads and stores
SIZE_T p0 = sptr[0];
SIZE_T p1 = sptr[1];
dptr[0] = p0;
dptr[1] = p1;
len ^= 2 * sizeof(SIZE_T);
if (len == 0)
{
return;
}
sptr += 2;
dptr += 2;
}
// Copy 16 (on 32-bit systems) or 32 (on 64-bit systems) bytes at a time
_ASSERTE(len >= 4 * sizeof(SIZE_T));
while (true)
{
// Read two values and write two values to hint the use of wide loads and stores
SIZE_T p0 = sptr[0];
SIZE_T p1 = sptr[1];
dptr[0] = p0;
dptr[1] = p1;
p0 = sptr[2];
p1 = sptr[3];
dptr[2] = p0;
dptr[3] = p1;
len -= 4 * sizeof(SIZE_T);
if (len == 0)
{
return;
}
sptr += 4;
dptr += 4;
}
#endif // defined(HOST_AMD64) && (defined(_MSC_VER) || defined(__GNUC__))
}
}
FORCEINLINE void InlinedBackwardGCSafeCopyHelper(void *dest, const void *src, size_t len)
{
CONTRACTL
{
NOTHROW;
GC_NOTRIGGER;
MODE_COOPERATIVE;
}
CONTRACTL_END;
_ASSERTE(dest != nullptr);
_ASSERTE(src != nullptr);
_ASSERTE(dest != src);
_ASSERTE(len != 0);
// To be able to copy backwards, the source buffer cannot start inside the destination buffer
_ASSERTE((SIZE_T)src - (SIZE_T)dest >= len);
// Make sure everything is pointer aligned
_ASSERTE(IS_ALIGNED(dest, sizeof(SIZE_T)));
_ASSERTE(IS_ALIGNED(src, sizeof(SIZE_T)));
_ASSERTE(IS_ALIGNED(len, sizeof(SIZE_T)));
_ASSERTE(CheckPointer(dest));
_ASSERTE(CheckPointer(src));
SIZE_T *dptr = (SIZE_T *)((BYTE *)dest + len);
SIZE_T *sptr = (SIZE_T *)((BYTE *)src + len);
while (true)
{
if ((len & sizeof(SIZE_T)) != 0)
{
--sptr;
--dptr;
*dptr = *sptr;
len ^= sizeof(SIZE_T);
if (len == 0)
{
return;
}
}
#if defined(HOST_AMD64) && (defined(_MSC_VER) || defined(__GNUC__))
if ((len & (2 * sizeof(SIZE_T))) != 0)
{
sptr -= 2;
dptr -= 2;
__m128 v = _mm_loadu_ps((float *)sptr);
_mm_storeu_ps((float *)dptr, v);
len ^= 2 * sizeof(SIZE_T);
if (len == 0)
{
return;
}
}
// Align the destination pointer to 16 bytes for the next set of 16-byte copies
if (((SIZE_T)dptr & sizeof(SIZE_T)) != 0)
{
--sptr;
--dptr;
*dptr = *sptr;
len -= sizeof(SIZE_T);
if (len < 4 * sizeof(SIZE_T))
{
continue;
}
}
// Copy 32 bytes at a time
_ASSERTE(len >= 4 * sizeof(SIZE_T));
do
{
sptr -= 4;
dptr -= 4;
__m128 v = _mm_loadu_ps((float *)(sptr + 2));
_mm_store_ps((float *)(dptr + 2), v);
v = _mm_loadu_ps((float *)sptr);
_mm_store_ps((float *)dptr, v);
len -= 4 * sizeof(SIZE_T);
} while (len >= 4 * sizeof(SIZE_T));
if (len == 0)
{
return;
}
#else // !(defined(HOST_AMD64) && (defined(_MSC_VER) || defined(__GNUC__)))
if ((len & (2 * sizeof(SIZE_T))) != 0)
{
sptr -= 2;
dptr -= 2;
// Read two values and write two values to hint the use of wide loads and stores
SIZE_T p1 = sptr[1];
SIZE_T p0 = sptr[0];
dptr[1] = p1;
dptr[0] = p0;
len ^= 2 * sizeof(SIZE_T);
if (len == 0)
{
return;
}
}
// Copy 16 (on 32-bit systems) or 32 (on 64-bit systems) bytes at a time
_ASSERTE(len >= 4 * sizeof(SIZE_T));
do
{
sptr -= 4;
dptr -= 4;
// Read two values and write two values to hint the use of wide loads and stores
SIZE_T p0 = sptr[2];
SIZE_T p1 = sptr[3];
dptr[2] = p0;
dptr[3] = p1;
p0 = sptr[0];
p1 = sptr[1];
dptr[0] = p0;
dptr[1] = p1;
len -= 4 * sizeof(SIZE_T);
} while (len != 0);
return;
#endif // defined(HOST_AMD64) && (defined(_MSC_VER) || defined(__GNUC__))
}
}
FORCEINLINE void InlinedMemmoveGCRefsHelper(void *dest, const void *src, size_t len)
{
CONTRACTL
{
NOTHROW;
GC_NOTRIGGER;
MODE_COOPERATIVE;
}
CONTRACTL_END;
_ASSERTE(dest != nullptr);
_ASSERTE(src != nullptr);
_ASSERTE(dest != src);
_ASSERTE(len != 0);
// Make sure everything is pointer aligned
_ASSERTE(IS_ALIGNED(dest, sizeof(SIZE_T)));
_ASSERTE(IS_ALIGNED(src, sizeof(SIZE_T)));
_ASSERTE(IS_ALIGNED(len, sizeof(SIZE_T)));
_ASSERTE(CheckPointer(dest));
_ASSERTE(CheckPointer(src));
GCHeapMemoryBarrier();
// To be able to copy forwards, the destination buffer cannot start inside the source buffer
if ((size_t)dest - (size_t)src >= len)
{
InlinedForwardGCSafeCopyHelper(dest, src, len);
}
else
{
InlinedBackwardGCSafeCopyHelper(dest, src, len);
}
InlinedSetCardsAfterBulkCopyHelper((Object**)dest, len);
}
#endif // !_ARRAYNATIVE_INL_