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simd.cpp
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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.
// See the LICENSE file in the project root for more information.
//
// SIMD Support
//
// IMPORTANT NOTES AND CAVEATS:
//
// This implementation is preliminary, and may change dramatically.
//
// New JIT types, TYP_SIMDxx, are introduced, and the SIMD intrinsics are created as GT_SIMD nodes.
// Nodes of SIMD types will be typed as TYP_SIMD* (e.g. TYP_SIMD8, TYP_SIMD16, etc.).
//
// Note that currently the "reference implementation" is the same as the runtime dll. As such, it is currently
// providing implementations for those methods not currently supported by the JIT as intrinsics.
//
// These are currently recognized using string compares, in order to provide an implementation in the JIT
// without taking a dependency on the VM.
// Furthermore, in the CTP, in order to limit the impact of doing these string compares
// against assembly names, we only look for the SIMDVector assembly if we are compiling a class constructor. This
// makes it somewhat more "pay for play" but is a significant usability compromise.
// This has been addressed for RTM by doing the assembly recognition in the VM.
// --------------------------------------------------------------------------------------
#include "jitpch.h"
#include "simd.h"
#ifdef _MSC_VER
#pragma hdrstop
#endif
#ifndef LEGACY_BACKEND // This file is ONLY used for the RyuJIT backend that uses the linear scan register allocator.
#ifdef FEATURE_SIMD
// Intrinsic Id to intrinsic info map
const SIMDIntrinsicInfo simdIntrinsicInfoArray[] = {
#define SIMD_INTRINSIC(mname, inst, id, name, retType, argCount, arg1, arg2, arg3, t1, t2, t3, t4, t5, t6, t7, t8, t9, \
t10) \
{SIMDIntrinsic##id, mname, inst, retType, argCount, arg1, arg2, arg3, t1, t2, t3, t4, t5, t6, t7, t8, t9, t10},
#include "simdintrinsiclist.h"
};
//------------------------------------------------------------------------
// getSIMDVectorLength: Get the length (number of elements of base type) of
// SIMD Vector given its size and base (element) type.
//
// Arguments:
// simdSize - size of the SIMD vector
// baseType - type of the elements of the SIMD vector
//
// static
int Compiler::getSIMDVectorLength(unsigned simdSize, var_types baseType)
{
return simdSize / genTypeSize(baseType);
}
//------------------------------------------------------------------------
// Get the length (number of elements of base type) of SIMD Vector given by typeHnd.
//
// Arguments:
// typeHnd - type handle of the SIMD vector
//
int Compiler::getSIMDVectorLength(CORINFO_CLASS_HANDLE typeHnd)
{
unsigned sizeBytes = 0;
var_types baseType = getBaseTypeAndSizeOfSIMDType(typeHnd, &sizeBytes);
return getSIMDVectorLength(sizeBytes, baseType);
}
//------------------------------------------------------------------------
// Get the preferred alignment of SIMD vector type for better performance.
//
// Arguments:
// typeHnd - type handle of the SIMD vector
//
int Compiler::getSIMDTypeAlignment(var_types simdType)
{
#ifdef _TARGET_XARCH_
// Fixed length vectors have the following alignment preference
// Vector2 = 8 byte alignment
// Vector3/4 = 16-byte alignment
unsigned size = genTypeSize(simdType);
// preferred alignment for SSE2 128-bit vectors is 16-bytes
if (size == 8)
{
return 8;
}
else if (size <= 16)
{
assert((size == 12) || (size == 16));
return 16;
}
else
{
assert(size == 32);
return 32;
}
#elif defined(_TARGET_ARM64_)
return 16;
#else
assert(!"getSIMDTypeAlignment() unimplemented on target arch");
unreached();
#endif
}
//----------------------------------------------------------------------------------
// Return the base type and size of SIMD vector type given its type handle.
//
// Arguments:
// typeHnd - The handle of the type we're interested in.
// sizeBytes - out param
//
// Return Value:
// base type of SIMD vector.
// sizeBytes if non-null is set to size in bytes.
//
// TODO-Throughput: current implementation parses class name to find base type. Change
// this when we implement SIMD intrinsic identification for the final
// product.
//
var_types Compiler::getBaseTypeAndSizeOfSIMDType(CORINFO_CLASS_HANDLE typeHnd, unsigned* sizeBytes /*= nullptr */)
{
assert(featureSIMD);
if (typeHnd == nullptr)
{
return TYP_UNKNOWN;
}
// fast path search using cached type handles of important types
var_types simdBaseType = TYP_UNKNOWN;
unsigned size = 0;
// TODO - Optimize SIMD type recognition by IntrinsicAttribute
if (isSIMDClass(typeHnd))
{
// The most likely to be used type handles are looked up first followed by
// less likely to be used type handles
if (typeHnd == SIMDFloatHandle)
{
simdBaseType = TYP_FLOAT;
JITDUMP(" Known type SIMD Vector<Float>\n");
}
else if (typeHnd == SIMDIntHandle)
{
simdBaseType = TYP_INT;
JITDUMP(" Known type SIMD Vector<Int>\n");
}
else if (typeHnd == SIMDVector2Handle)
{
simdBaseType = TYP_FLOAT;
size = 2 * genTypeSize(TYP_FLOAT);
assert(size == roundUp(info.compCompHnd->getClassSize(typeHnd), TARGET_POINTER_SIZE));
JITDUMP(" Known type Vector2\n");
}
else if (typeHnd == SIMDVector3Handle)
{
simdBaseType = TYP_FLOAT;
size = 3 * genTypeSize(TYP_FLOAT);
assert(size == info.compCompHnd->getClassSize(typeHnd));
JITDUMP(" Known type Vector3\n");
}
else if (typeHnd == SIMDVector4Handle)
{
simdBaseType = TYP_FLOAT;
size = 4 * genTypeSize(TYP_FLOAT);
assert(size == roundUp(info.compCompHnd->getClassSize(typeHnd), TARGET_POINTER_SIZE));
JITDUMP(" Known type Vector4\n");
}
else if (typeHnd == SIMDVectorHandle)
{
JITDUMP(" Known type Vector\n");
}
else if (typeHnd == SIMDUShortHandle)
{
simdBaseType = TYP_USHORT;
JITDUMP(" Known type SIMD Vector<ushort>\n");
}
else if (typeHnd == SIMDUByteHandle)
{
simdBaseType = TYP_UBYTE;
JITDUMP(" Known type SIMD Vector<ubyte>\n");
}
else if (typeHnd == SIMDDoubleHandle)
{
simdBaseType = TYP_DOUBLE;
JITDUMP(" Known type SIMD Vector<Double>\n");
}
else if (typeHnd == SIMDLongHandle)
{
simdBaseType = TYP_LONG;
JITDUMP(" Known type SIMD Vector<Long>\n");
}
else if (typeHnd == SIMDShortHandle)
{
simdBaseType = TYP_SHORT;
JITDUMP(" Known type SIMD Vector<short>\n");
}
else if (typeHnd == SIMDByteHandle)
{
simdBaseType = TYP_BYTE;
JITDUMP(" Known type SIMD Vector<byte>\n");
}
else if (typeHnd == SIMDUIntHandle)
{
simdBaseType = TYP_UINT;
JITDUMP(" Known type SIMD Vector<uint>\n");
}
else if (typeHnd == SIMDULongHandle)
{
simdBaseType = TYP_ULONG;
JITDUMP(" Known type SIMD Vector<ulong>\n");
}
// slow path search
if (simdBaseType == TYP_UNKNOWN)
{
// Doesn't match with any of the cached type handles.
// Obtain base type by parsing fully qualified class name.
//
// TODO-Throughput: implement product shipping solution to query base type.
WCHAR className[256] = {0};
WCHAR* pbuf = &className[0];
int len = _countof(className);
info.compCompHnd->appendClassName(&pbuf, &len, typeHnd, TRUE, FALSE, FALSE);
noway_assert(pbuf < &className[256]);
JITDUMP("SIMD Candidate Type %S\n", className);
if (wcsncmp(className, W("System.Numerics."), 16) == 0)
{
if (wcsncmp(&(className[16]), W("Vector`1["), 9) == 0)
{
if (wcsncmp(&(className[25]), W("System.Single"), 13) == 0)
{
SIMDFloatHandle = typeHnd;
simdBaseType = TYP_FLOAT;
JITDUMP(" Found type SIMD Vector<Float>\n");
}
else if (wcsncmp(&(className[25]), W("System.Int32"), 12) == 0)
{
SIMDIntHandle = typeHnd;
simdBaseType = TYP_INT;
JITDUMP(" Found type SIMD Vector<Int>\n");
}
else if (wcsncmp(&(className[25]), W("System.UInt16"), 13) == 0)
{
SIMDUShortHandle = typeHnd;
simdBaseType = TYP_USHORT;
JITDUMP(" Found type SIMD Vector<ushort>\n");
}
else if (wcsncmp(&(className[25]), W("System.Byte"), 11) == 0)
{
SIMDUByteHandle = typeHnd;
simdBaseType = TYP_UBYTE;
JITDUMP(" Found type SIMD Vector<ubyte>\n");
}
else if (wcsncmp(&(className[25]), W("System.Double"), 13) == 0)
{
SIMDDoubleHandle = typeHnd;
simdBaseType = TYP_DOUBLE;
JITDUMP(" Found type SIMD Vector<Double>\n");
}
else if (wcsncmp(&(className[25]), W("System.Int64"), 12) == 0)
{
SIMDLongHandle = typeHnd;
simdBaseType = TYP_LONG;
JITDUMP(" Found type SIMD Vector<Long>\n");
}
else if (wcsncmp(&(className[25]), W("System.Int16"), 12) == 0)
{
SIMDShortHandle = typeHnd;
simdBaseType = TYP_SHORT;
JITDUMP(" Found type SIMD Vector<short>\n");
}
else if (wcsncmp(&(className[25]), W("System.SByte"), 12) == 0)
{
SIMDByteHandle = typeHnd;
simdBaseType = TYP_BYTE;
JITDUMP(" Found type SIMD Vector<byte>\n");
}
else if (wcsncmp(&(className[25]), W("System.UInt32"), 13) == 0)
{
SIMDUIntHandle = typeHnd;
simdBaseType = TYP_UINT;
JITDUMP(" Found type SIMD Vector<uint>\n");
}
else if (wcsncmp(&(className[25]), W("System.UInt64"), 13) == 0)
{
SIMDULongHandle = typeHnd;
simdBaseType = TYP_ULONG;
JITDUMP(" Found type SIMD Vector<ulong>\n");
}
else
{
JITDUMP(" Unknown SIMD Vector<T>\n");
}
}
else if (wcsncmp(&(className[16]), W("Vector2"), 8) == 0)
{
SIMDVector2Handle = typeHnd;
simdBaseType = TYP_FLOAT;
size = 2 * genTypeSize(TYP_FLOAT);
assert(size == roundUp(info.compCompHnd->getClassSize(typeHnd), TARGET_POINTER_SIZE));
JITDUMP(" Found Vector2\n");
}
else if (wcsncmp(&(className[16]), W("Vector3"), 8) == 0)
{
SIMDVector3Handle = typeHnd;
simdBaseType = TYP_FLOAT;
size = 3 * genTypeSize(TYP_FLOAT);
assert(size == info.compCompHnd->getClassSize(typeHnd));
JITDUMP(" Found Vector3\n");
}
else if (wcsncmp(&(className[16]), W("Vector4"), 8) == 0)
{
SIMDVector4Handle = typeHnd;
simdBaseType = TYP_FLOAT;
size = 4 * genTypeSize(TYP_FLOAT);
assert(size == roundUp(info.compCompHnd->getClassSize(typeHnd), TARGET_POINTER_SIZE));
JITDUMP(" Found Vector4\n");
}
else if (wcsncmp(&(className[16]), W("Vector"), 6) == 0)
{
SIMDVectorHandle = typeHnd;
JITDUMP(" Found type Vector\n");
}
else
{
JITDUMP(" Unknown SIMD Type\n");
}
}
}
if (simdBaseType != TYP_UNKNOWN && sizeBytes != nullptr)
{
// If not a fixed size vector then its size is same as SIMD vector
// register length in bytes
if (size == 0)
{
size = getSIMDVectorRegisterByteLength();
}
*sizeBytes = size;
setUsesSIMDTypes(true);
}
}
#ifdef FEATURE_HW_INTRINSICS
else if (isIntrinsicType(typeHnd))
{
const size_t Vector64SizeBytes = 64 / 8;
const size_t Vector128SizeBytes = 128 / 8;
const size_t Vector256SizeBytes = 256 / 8;
#if defined(_TARGET_XARCH_)
static_assert_no_msg(YMM_REGSIZE_BYTES == Vector256SizeBytes);
static_assert_no_msg(XMM_REGSIZE_BYTES == Vector128SizeBytes);
if (typeHnd == Vector256FloatHandle)
{
simdBaseType = TYP_FLOAT;
size = Vector256SizeBytes;
JITDUMP(" Known type Vector256<float>\n");
}
else if (typeHnd == Vector256DoubleHandle)
{
simdBaseType = TYP_DOUBLE;
size = Vector256SizeBytes;
JITDUMP(" Known type Vector256<double>\n");
}
else if (typeHnd == Vector256IntHandle)
{
simdBaseType = TYP_INT;
size = Vector256SizeBytes;
JITDUMP(" Known type Vector256<int>\n");
}
else if (typeHnd == Vector256UIntHandle)
{
simdBaseType = TYP_UINT;
size = Vector256SizeBytes;
JITDUMP(" Known type Vector256<uint>\n");
}
else if (typeHnd == Vector256ShortHandle)
{
simdBaseType = TYP_SHORT;
size = Vector256SizeBytes;
JITDUMP(" Known type Vector256<short>\n");
}
else if (typeHnd == Vector256UShortHandle)
{
simdBaseType = TYP_USHORT;
size = Vector256SizeBytes;
JITDUMP(" Known type Vector256<ushort>\n");
}
else if (typeHnd == Vector256ByteHandle)
{
simdBaseType = TYP_BYTE;
size = Vector256SizeBytes;
JITDUMP(" Known type Vector256<sbyte>\n");
}
else if (typeHnd == Vector256UByteHandle)
{
simdBaseType = TYP_UBYTE;
size = Vector256SizeBytes;
JITDUMP(" Known type Vector256<byte>\n");
}
else if (typeHnd == Vector256LongHandle)
{
simdBaseType = TYP_LONG;
size = Vector256SizeBytes;
JITDUMP(" Known type Vector256<long>\n");
}
else if (typeHnd == Vector256ULongHandle)
{
simdBaseType = TYP_ULONG;
size = Vector256SizeBytes;
JITDUMP(" Known type Vector256<ulong>\n");
}
else if (typeHnd == Vector256FloatHandle)
{
simdBaseType = TYP_FLOAT;
size = Vector256SizeBytes;
JITDUMP(" Known type Vector256<float>\n");
}
else
#endif // defined(_TARGET_XARCH)
if (typeHnd == Vector128DoubleHandle)
{
simdBaseType = TYP_DOUBLE;
size = Vector128SizeBytes;
JITDUMP(" Known type Vector128<double>\n");
}
else if (typeHnd == Vector128IntHandle)
{
simdBaseType = TYP_INT;
size = Vector128SizeBytes;
JITDUMP(" Known type Vector128<int>\n");
}
else if (typeHnd == Vector128UIntHandle)
{
simdBaseType = TYP_UINT;
size = Vector128SizeBytes;
JITDUMP(" Known type Vector128<uint>\n");
}
else if (typeHnd == Vector128ShortHandle)
{
simdBaseType = TYP_SHORT;
size = Vector128SizeBytes;
JITDUMP(" Known type Vector128<short>\n");
}
else if (typeHnd == Vector128UShortHandle)
{
simdBaseType = TYP_USHORT;
size = Vector128SizeBytes;
JITDUMP(" Known type Vector128<ushort>\n");
}
else if (typeHnd == Vector128ByteHandle)
{
simdBaseType = TYP_BYTE;
size = Vector128SizeBytes;
JITDUMP(" Known type Vector128<sbyte>\n");
}
else if (typeHnd == Vector128UByteHandle)
{
simdBaseType = TYP_UBYTE;
size = Vector128SizeBytes;
JITDUMP(" Known type Vector128<byte>\n");
}
else if (typeHnd == Vector128LongHandle)
{
simdBaseType = TYP_LONG;
size = Vector128SizeBytes;
JITDUMP(" Known type Vector128<long>\n");
}
else if (typeHnd == Vector128ULongHandle)
{
simdBaseType = TYP_ULONG;
size = Vector128SizeBytes;
JITDUMP(" Known type Vector128<ulong>\n");
}
#if defined(_TARGET_ARM64_)
else if (typeHnd == Vector64IntHandle)
{
simdBaseType = TYP_INT;
size = Vector64SizeBytes;
JITDUMP(" Known type Vector64<int>\n");
}
else if (typeHnd == Vector64UIntHandle)
{
simdBaseType = TYP_UINT;
size = Vector64SizeBytes;
JITDUMP(" Known type Vector64<uint>\n");
}
else if (typeHnd == Vector64ShortHandle)
{
simdBaseType = TYP_SHORT;
size = Vector64SizeBytes;
JITDUMP(" Known type Vector64<short>\n");
}
else if (typeHnd == Vector64UShortHandle)
{
simdBaseType = TYP_USHORT;
size = Vector64SizeBytes;
JITDUMP(" Known type Vector64<ushort>\n");
}
else if (typeHnd == Vector64ByteHandle)
{
simdBaseType = TYP_BYTE;
size = Vector64SizeBytes;
JITDUMP(" Known type Vector64<sbyte>\n");
}
else if (typeHnd == Vector64UByteHandle)
{
simdBaseType = TYP_UBYTE;
size = Vector64SizeBytes;
JITDUMP(" Known type Vector64<byte>\n");
}
#endif // defined(_TARGET_ARM64_)
// slow path search
if (simdBaseType == TYP_UNKNOWN)
{
// Doesn't match with any of the cached type handles.
const char* className = getClassNameFromMetadata(typeHnd, nullptr);
CORINFO_CLASS_HANDLE baseTypeHnd = getTypeInstantiationArgument(typeHnd, 0);
if (baseTypeHnd != nullptr)
{
CorInfoType type = info.compCompHnd->getTypeForPrimitiveNumericClass(baseTypeHnd);
JITDUMP("HW Intrinsic SIMD Candidate Type %s with Base Type %s\n", className,
getClassNameFromMetadata(baseTypeHnd, nullptr));
#if defined(_TARGET_XARCH_)
if (strcmp(className, "Vector256`1") == 0)
{
size = Vector256SizeBytes;
switch (type)
{
case CORINFO_TYPE_FLOAT:
Vector256FloatHandle = typeHnd;
simdBaseType = TYP_FLOAT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector256<float>\n");
break;
case CORINFO_TYPE_DOUBLE:
Vector256DoubleHandle = typeHnd;
simdBaseType = TYP_DOUBLE;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector256<double>\n");
break;
case CORINFO_TYPE_INT:
Vector256IntHandle = typeHnd;
simdBaseType = TYP_INT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector256<int>\n");
break;
case CORINFO_TYPE_UINT:
Vector256UIntHandle = typeHnd;
simdBaseType = TYP_UINT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector256<uint>\n");
break;
case CORINFO_TYPE_SHORT:
Vector256ShortHandle = typeHnd;
simdBaseType = TYP_SHORT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector256<short>\n");
break;
case CORINFO_TYPE_USHORT:
Vector256UShortHandle = typeHnd;
simdBaseType = TYP_USHORT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector256<ushort>\n");
break;
case CORINFO_TYPE_LONG:
Vector256LongHandle = typeHnd;
simdBaseType = TYP_LONG;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector256<long>\n");
break;
case CORINFO_TYPE_ULONG:
Vector256ULongHandle = typeHnd;
simdBaseType = TYP_ULONG;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector256<ulong>\n");
break;
case CORINFO_TYPE_UBYTE:
Vector256UByteHandle = typeHnd;
simdBaseType = TYP_UBYTE;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector256<byte>\n");
break;
case CORINFO_TYPE_BYTE:
Vector256ByteHandle = typeHnd;
simdBaseType = TYP_BYTE;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector256<sbyte>\n");
break;
default:
JITDUMP(" Unknown Hardware Intrinsic SIMD Type Vector256<T>\n");
}
}
else
#endif // defined(_TARGET_XARCH_)
if (strcmp(className, "Vector128`1") == 0)
{
size = Vector128SizeBytes;
switch (type)
{
case CORINFO_TYPE_FLOAT:
Vector128FloatHandle = typeHnd;
simdBaseType = TYP_FLOAT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector128<float>\n");
break;
case CORINFO_TYPE_DOUBLE:
Vector128DoubleHandle = typeHnd;
simdBaseType = TYP_DOUBLE;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector128<double>\n");
break;
case CORINFO_TYPE_INT:
Vector128IntHandle = typeHnd;
simdBaseType = TYP_INT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector128<int>\n");
break;
case CORINFO_TYPE_UINT:
Vector128UIntHandle = typeHnd;
simdBaseType = TYP_UINT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector128<uint>\n");
break;
case CORINFO_TYPE_SHORT:
Vector128ShortHandle = typeHnd;
simdBaseType = TYP_SHORT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector128<short>\n");
break;
case CORINFO_TYPE_USHORT:
Vector128UShortHandle = typeHnd;
simdBaseType = TYP_USHORT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector128<ushort>\n");
break;
case CORINFO_TYPE_LONG:
Vector128LongHandle = typeHnd;
simdBaseType = TYP_LONG;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector128<long>\n");
break;
case CORINFO_TYPE_ULONG:
Vector128ULongHandle = typeHnd;
simdBaseType = TYP_ULONG;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector128<ulong>\n");
break;
case CORINFO_TYPE_UBYTE:
Vector128UByteHandle = typeHnd;
simdBaseType = TYP_UBYTE;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector128<byte>\n");
break;
case CORINFO_TYPE_BYTE:
Vector128ByteHandle = typeHnd;
simdBaseType = TYP_BYTE;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector128<sbyte>\n");
break;
default:
JITDUMP(" Unknown Hardware Intrinsic SIMD Type Vector128<T>\n");
}
}
#if defined(_TARGET_ARM64_)
else if (strcmp(className, "Vector64`1") == 0)
{
size = Vector64SizeBytes;
switch (type)
{
case CORINFO_TYPE_FLOAT:
Vector64FloatHandle = typeHnd;
simdBaseType = TYP_FLOAT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector64<float>\n");
break;
case CORINFO_TYPE_INT:
Vector64IntHandle = typeHnd;
simdBaseType = TYP_INT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector64<int>\n");
break;
case CORINFO_TYPE_UINT:
Vector64UIntHandle = typeHnd;
simdBaseType = TYP_UINT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector64<uint>\n");
break;
case CORINFO_TYPE_SHORT:
Vector64ShortHandle = typeHnd;
simdBaseType = TYP_SHORT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector64<short>\n");
break;
case CORINFO_TYPE_USHORT:
Vector64UShortHandle = typeHnd;
simdBaseType = TYP_USHORT;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector64<ushort>\n");
break;
case CORINFO_TYPE_UBYTE:
Vector64UByteHandle = typeHnd;
simdBaseType = TYP_UBYTE;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector64<byte>\n");
break;
case CORINFO_TYPE_BYTE:
Vector64ByteHandle = typeHnd;
simdBaseType = TYP_BYTE;
JITDUMP(" Found type Hardware Intrinsic SIMD Vector64<sbyte>\n");
break;
default:
JITDUMP(" Unknown Hardware Intrinsic SIMD Type Vector64<T>\n");
}
}
#endif // defined(_TARGET_ARM64_)
}
}
if (sizeBytes != nullptr)
{
*sizeBytes = size;
}
if (simdBaseType != TYP_UNKNOWN)
{
setUsesSIMDTypes(true);
}
}
#endif // FEATURE_HW_INTRINSICS
return simdBaseType;
}
//--------------------------------------------------------------------------------------
// getSIMDIntrinsicInfo: get SIMD intrinsic info given the method handle.
//
// Arguments:
// inOutTypeHnd - The handle of the type on which the method is invoked. This is an in-out param.
// methodHnd - The handle of the method we're interested in.
// sig - method signature info
// isNewObj - whether this call represents a newboj constructor call
// argCount - argument count - out pram
// baseType - base type of the intrinsic - out param
// sizeBytes - size of SIMD vector type on which the method is invoked - out param
//
// Return Value:
// SIMDIntrinsicInfo struct initialized corresponding to methodHnd.
// Sets SIMDIntrinsicInfo.id to SIMDIntrinsicInvalid if methodHnd doesn't correspond
// to any SIMD intrinsic. Also, sets the out params inOutTypeHnd, argCount, baseType and
// sizeBytes.
//
// Note that VectorMath class doesn't have a base type and first argument of the method
// determines the SIMD vector type on which intrinsic is invoked. In such a case inOutTypeHnd
// is modified by this routine.
//
// TODO-Throughput: The current implementation is based on method name string parsing.
// Although we now have type identification from the VM, the parsing of intrinsic names
// could be made more efficient.
//
const SIMDIntrinsicInfo* Compiler::getSIMDIntrinsicInfo(CORINFO_CLASS_HANDLE* inOutTypeHnd,
CORINFO_METHOD_HANDLE methodHnd,
CORINFO_SIG_INFO* sig,
bool isNewObj,
unsigned* argCount,
var_types* baseType,
unsigned* sizeBytes)
{
assert(featureSIMD);
assert(baseType != nullptr);
assert(sizeBytes != nullptr);
// get baseType and size of the type
CORINFO_CLASS_HANDLE typeHnd = *inOutTypeHnd;
*baseType = getBaseTypeAndSizeOfSIMDType(typeHnd, sizeBytes);
if (typeHnd == SIMDVectorHandle)
{
// All of the supported intrinsics on this static class take a first argument that's a vector,
// which determines the baseType.
// The exception is the IsHardwareAccelerated property, which is handled as a special case.
assert(*baseType == TYP_UNKNOWN);
if (sig->numArgs == 0)
{
const SIMDIntrinsicInfo* hwAccelIntrinsicInfo = &(simdIntrinsicInfoArray[SIMDIntrinsicHWAccel]);
if ((strcmp(eeGetMethodName(methodHnd, nullptr), hwAccelIntrinsicInfo->methodName) == 0) &&
JITtype2varType(sig->retType) == hwAccelIntrinsicInfo->retType)
{
// Sanity check
assert(hwAccelIntrinsicInfo->argCount == 0 && hwAccelIntrinsicInfo->isInstMethod == false);
return hwAccelIntrinsicInfo;
}
return nullptr;
}
else
{
typeHnd = info.compCompHnd->getArgClass(sig, sig->args);
*inOutTypeHnd = typeHnd;
*baseType = getBaseTypeAndSizeOfSIMDType(typeHnd, sizeBytes);
}
}
if (*baseType == TYP_UNKNOWN)
{
JITDUMP("NOT a SIMD Intrinsic: unsupported baseType\n");
return nullptr;
}
// account for implicit "this" arg
*argCount = sig->numArgs;
if (sig->hasThis())
{
*argCount += 1;
}
// Get the Intrinsic Id by parsing method name.
//
// TODO-Throughput: replace sequential search by binary search by arranging entries
// sorted by method name.
SIMDIntrinsicID intrinsicId = SIMDIntrinsicInvalid;
const char* methodName = eeGetMethodName(methodHnd, nullptr);
for (int i = SIMDIntrinsicNone + 1; i < SIMDIntrinsicInvalid; ++i)
{
if (strcmp(methodName, simdIntrinsicInfoArray[i].methodName) == 0)
{
// Found an entry for the method; further check whether it is one of
// the supported base types.
bool found = false;
for (int j = 0; j < SIMD_INTRINSIC_MAX_BASETYPE_COUNT; ++j)
{
// Convention: if there are fewer base types supported than MAX_BASETYPE_COUNT,
// the end of the list is marked by TYP_UNDEF.
if (simdIntrinsicInfoArray[i].supportedBaseTypes[j] == TYP_UNDEF)
{
break;
}
if (simdIntrinsicInfoArray[i].supportedBaseTypes[j] == *baseType)
{
found = true;
break;
}
}
if (!found)
{
continue;
}
// Now, check the arguments.
unsigned int fixedArgCnt = simdIntrinsicInfoArray[i].argCount;
unsigned int expectedArgCnt = fixedArgCnt;
// First handle SIMDIntrinsicInitN, where the arg count depends on the type.
// The listed arg types include the vector and the first two init values, which is the expected number
// for Vector2. For other cases, we'll check their types here.
if (*argCount > expectedArgCnt)
{
if (i == SIMDIntrinsicInitN)
{
if (*argCount == 3 && typeHnd == SIMDVector2Handle)
{
expectedArgCnt = 3;
}
else if (*argCount == 4 && typeHnd == SIMDVector3Handle)
{
expectedArgCnt = 4;
}
else if (*argCount == 5 && typeHnd == SIMDVector4Handle)
{
expectedArgCnt = 5;
}
}
else if (i == SIMDIntrinsicInitFixed)
{
if (*argCount == 4 && typeHnd == SIMDVector4Handle)
{
expectedArgCnt = 4;
}
}
}
if (*argCount != expectedArgCnt)
{
continue;
}
// Validate the types of individual args passed are what is expected of.
// If any of the types don't match with what is expected, don't consider
// as an intrinsic. This will make an older JIT with SIMD capabilities
// resilient to breaking changes to SIMD managed API.
//
// Note that from IL type stack, args get popped in right to left order
// whereas args get listed in method signatures in left to right order.
int stackIndex = (expectedArgCnt - 1);
// Track the arguments from the signature - we currently only use this to distinguish
// integral and pointer types, both of which will by TYP_I_IMPL on the importer stack.
CORINFO_ARG_LIST_HANDLE argLst = sig->args;
CORINFO_CLASS_HANDLE argClass;
for (unsigned int argIndex = 0; found == true && argIndex < expectedArgCnt; argIndex++)
{
bool isThisPtr = ((argIndex == 0) && sig->hasThis());
// In case of "newobj SIMDVector<T>(T val)", thisPtr won't be present on type stack.
// We don't check anything in that case.
if (!isThisPtr || !isNewObj)
{
GenTree* arg = impStackTop(stackIndex).val;
var_types argType = arg->TypeGet();
var_types expectedArgType;
if (argIndex < fixedArgCnt)
{
// Convention:
// - intrinsicInfo.argType[i] == TYP_UNDEF - intrinsic doesn't have a valid arg at position i
// - intrinsicInfo.argType[i] == TYP_UNKNOWN - arg type should be same as basetype
// Note that we pop the args off in reverse order.
expectedArgType = simdIntrinsicInfoArray[i].argType[argIndex];
assert(expectedArgType != TYP_UNDEF);
if (expectedArgType == TYP_UNKNOWN)
{
// The type of the argument will be genActualType(*baseType).
expectedArgType = genActualType(*baseType);
argType = genActualType(argType);
}
}
else
{
expectedArgType = *baseType;
}
if (!isThisPtr && argType == TYP_I_IMPL)
{
// The reference implementation has a constructor that takes a pointer.
// We don't want to recognize that one. This requires us to look at the CorInfoType
// in order to distinguish a signature with a pointer argument from one with an
// integer argument of pointer size, both of which will be TYP_I_IMPL on the stack.
// TODO-Review: This seems quite fragile. We should consider beefing up the checking
// here.
CorInfoType corType = strip(info.compCompHnd->getArgType(sig, argLst, &argClass));
if (corType == CORINFO_TYPE_PTR)
{
found = false;
}
}
if (varTypeIsSIMD(argType))
{
argType = TYP_STRUCT;
}
if (argType != expectedArgType)
{
found = false;
}
}
if (argIndex != 0 || !sig->hasThis())
{
argLst = info.compCompHnd->getArgNext(argLst);
}
stackIndex--;
}
// Cross check return type and static vs. instance is what we are expecting.
// If not, don't consider it as an intrinsic.
// Note that ret type of TYP_UNKNOWN means that it is not known apriori and must be same as baseType
if (found)
{
var_types expectedRetType = simdIntrinsicInfoArray[i].retType;
if (expectedRetType == TYP_UNKNOWN)
{
// JIT maps uint/ulong type vars to TYP_INT/TYP_LONG.
expectedRetType =
(*baseType == TYP_UINT || *baseType == TYP_ULONG) ? genActualType(*baseType) : *baseType;
}
if (JITtype2varType(sig->retType) != expectedRetType ||
sig->hasThis() != simdIntrinsicInfoArray[i].isInstMethod)
{
found = false;
}
}
if (found)
{
intrinsicId = (SIMDIntrinsicID)i;
break;
}
}
}
if (intrinsicId != SIMDIntrinsicInvalid)
{
JITDUMP("Method %s maps to SIMD intrinsic %s\n", methodName, simdIntrinsicNames[intrinsicId]);
return &simdIntrinsicInfoArray[intrinsicId];
}
else
{
JITDUMP("Method %s is NOT a SIMD intrinsic\n", methodName);
}
return nullptr;
}
// Pops and returns GenTree node from importer's type stack.
// Normalizes TYP_STRUCT value in case of GT_CALL, GT_RET_EXPR and arg nodes.
//
// Arguments:
// type - the type of value that the caller expects to be popped off the stack.