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JIT: Added SVE APIs CreateMaskForFirstActiveElement and CreateMaskForNextActiveElement #104002

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merged 13 commits into from
Jun 29, 2024
2 changes: 2 additions & 0 deletions src/coreclr/jit/hwintrinsic.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -1916,6 +1916,8 @@ GenTree* Compiler::impHWIntrinsic(NamedIntrinsic intrinsic,
break;
}

case NI_Sve_CreateMaskForFirstActiveElement:
case NI_Sve_CreateMaskForNextActiveElement:
case NI_Sve_GetActiveElementCount:
case NI_Sve_TestAnyTrue:
case NI_Sve_TestFirstTrue:
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33 changes: 32 additions & 1 deletion src/coreclr/jit/hwintrinsiccodegenarm64.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -843,7 +843,23 @@ void CodeGen::genHWIntrinsic(GenTreeHWIntrinsic* node)
assert(!node->IsEmbMaskOp());
if (HWIntrinsicInfo::IsExplicitMaskedOperation(intrin.id))
{
GetEmitter()->emitIns_R_R_R(ins, emitSize, targetReg, op1Reg, op2Reg, opt);
if (isRMW)
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can you confirm in what cases we come at this code path vs. the one at the end of this file?

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@TIHan TIHan Jun 27, 2024

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CreateMaskForNextActiveElement will come there, and any table-driven HW intrinsic that has two parameters with an explicit masked operation. But CreateMaskForNextActiveElement is the first RMW to reach this path.

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Why cannot NI_Sve_CreateMaskForFirstActiveElement handled here itself after you remove the SpecialCodegen flag for it. They both need INS_OPTS_SCALABLE_B as opt. So if this code can work for
NI_Sve_CreateMaskForNextActiveElement, wondering why can't it work for NI_Sve_CreateMaskForFirstActiveElement?

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FirstActiveElement will as well, sorry I didn't include it in my comment

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Oh, I see now. Yes, we shouldn't need the SpecialCodeGen for FirstActiveElement.

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Ok, I actually tried it out. So 'pnext' is PNEXT <Pdn>.<T>, <Pv>, <Pdn>.<T> while 'pfirst' is PFIRST <Pdn>.B, <Pg>, <Pdn>.B. So, yea, we actually need to do SpecialCodeGen for FirstActiveElement.

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hhm, not sure I am still following. Since FirstActiveElement code that you have is:

                assert(isRMW);
                assert(HWIntrinsicInfo::IsExplicitMaskedOperation(intrin.id));

                if (targetReg != op2Reg)
                {
                    assert(targetReg != op1Reg);
                    GetEmitter()->emitIns_Mov(INS_sve_mov, emitTypeSize(node), targetReg, op2Reg, /* canSkip */ true);
                }

                GetEmitter()->emitIns_R_R(ins, emitSize, targetReg, op1Reg, INS_OPTS_SCALABLE_B);
                break;

If we delete that, it will come on line 846, check it is isRMW and go inside if block and call emitIns_R_R(). Unless I am missing something major here.

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From the line you are talking about, when the opt gets passed to emitIns_R_R, the opt is not guaranteed to be INS_OPTS_SCALABLE_B

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Ok, that's where the confusion was on my part. I was looking at the unit tests and thought they both take just INS_OPTS_SCALABLE_B, but looking again at https://docsmirror.github.io/A64/2023-06/pnext_p_p_p.html, it can get other values as well. Makes sense now. Thanks!
 

theEmitter->emitIns_R_R(INS_sve_pnext, EA_SCALABLE, REG_P0, REG_P15,
INS_OPTS_SCALABLE_B); // PNEXT <Pdn>.<T>, <Pv>, <Pdn>.<T>

theEmitter->emitIns_R_R(INS_sve_pfirst, EA_SCALABLE, REG_P0, REG_P15,
INS_OPTS_SCALABLE_B); // PFIRST <Pdn>.B, <Pg>, <Pdn>.B

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I was looking at the unit tests and thought they both take just INS_OPTS_SCALABLE_B

I did the same thing. :)

{
if (targetReg != op2Reg)
{
assert(targetReg != op1Reg);

GetEmitter()->emitIns_Mov(ins_Move_Extend(intrin.op2->TypeGet(), false),
emitTypeSize(node), targetReg, op2Reg,
/* canSkip */ true);
}

GetEmitter()->emitIns_R_R(ins, emitSize, targetReg, op1Reg, opt);
}
else
{
GetEmitter()->emitIns_R_R_R(ins, emitSize, targetReg, op1Reg, op2Reg, opt);
}
}
else
{
Expand Down Expand Up @@ -2187,6 +2203,21 @@ void CodeGen::genHWIntrinsic(GenTreeHWIntrinsic* node)
break;
}

case NI_Sve_CreateMaskForFirstActiveElement:
{
assert(isRMW);
assert(HWIntrinsicInfo::IsExplicitMaskedOperation(intrin.id));

if (targetReg != op2Reg)
{
assert(targetReg != op1Reg);
GetEmitter()->emitIns_Mov(INS_sve_mov, emitTypeSize(node), targetReg, op2Reg, /* canSkip */ true);
}

GetEmitter()->emitIns_R_R(ins, emitSize, targetReg, op1Reg, INS_OPTS_SCALABLE_B);
break;
}

default:
unreached();
}
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2 changes: 2 additions & 0 deletions src/coreclr/jit/hwintrinsiclistarm64sve.h
Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,8 @@ HARDWARE_INTRINSIC(Sve, CreateFalseMaskSingle,
HARDWARE_INTRINSIC(Sve, CreateFalseMaskUInt16, -1, 0, false, {INS_invalid, INS_invalid, INS_invalid, INS_sve_pfalse, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid}, HW_Category_SIMD, HW_Flag_Scalable|HW_Flag_ReturnsPerElementMask)
HARDWARE_INTRINSIC(Sve, CreateFalseMaskUInt32, -1, 0, false, {INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_sve_pfalse, INS_invalid, INS_invalid, INS_invalid, INS_invalid}, HW_Category_SIMD, HW_Flag_Scalable|HW_Flag_ReturnsPerElementMask)
HARDWARE_INTRINSIC(Sve, CreateFalseMaskUInt64, -1, 0, false, {INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_sve_pfalse, INS_invalid, INS_invalid}, HW_Category_SIMD, HW_Flag_Scalable|HW_Flag_ReturnsPerElementMask)
HARDWARE_INTRINSIC(Sve, CreateMaskForFirstActiveElement, -1, 2, true, {INS_sve_pfirst, INS_sve_pfirst, INS_sve_pfirst, INS_sve_pfirst, INS_sve_pfirst, INS_sve_pfirst, INS_sve_pfirst, INS_sve_pfirst, INS_invalid, INS_invalid}, HW_Category_SIMD, HW_Flag_Scalable|HW_Flag_ExplicitMaskedOperation|HW_Flag_ReturnsPerElementMask|HW_Flag_SpecialCodeGen|HW_Flag_HasRMWSemantics)
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I don't think you need SpecialCodeGen for this. They should be handled the same way CreateMaskForNextActiveElement is handled.

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I have to in order to pass INS_OPTS_SCALABLE_B as part of emitting the instruction.

HARDWARE_INTRINSIC(Sve, CreateMaskForNextActiveElement, -1, 2, true, {INS_invalid, INS_sve_pnext, INS_invalid, INS_sve_pnext, INS_invalid, INS_sve_pnext, INS_invalid, INS_sve_pnext, INS_invalid, INS_invalid}, HW_Category_SIMD, HW_Flag_Scalable|HW_Flag_ExplicitMaskedOperation|HW_Flag_ReturnsPerElementMask|HW_Flag_HasRMWSemantics)
HARDWARE_INTRINSIC(Sve, CreateTrueMaskByte, -1, 1, false, {INS_invalid, INS_sve_ptrue, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid}, HW_Category_SIMD, HW_Flag_Scalable|HW_Flag_HasEnumOperand|HW_Flag_ReturnsPerElementMask)
HARDWARE_INTRINSIC(Sve, CreateTrueMaskDouble, -1, 1, false, {INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_sve_ptrue}, HW_Category_SIMD, HW_Flag_Scalable|HW_Flag_HasEnumOperand|HW_Flag_ReturnsPerElementMask)
HARDWARE_INTRINSIC(Sve, CreateTrueMaskInt16, -1, 1, false, {INS_invalid, INS_invalid, INS_sve_ptrue, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid, INS_invalid}, HW_Category_SIMD, HW_Flag_Scalable|HW_Flag_HasEnumOperand|HW_Flag_ReturnsPerElementMask)
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2 changes: 0 additions & 2 deletions src/coreclr/jit/instr.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -1721,7 +1721,6 @@ instruction CodeGen::ins_Move_Extend(var_types srcType, bool srcInReg)
#if defined(TARGET_XARCH)
return INS_kmovq_msk;
#elif defined(TARGET_ARM64)
unreached(); // TODO-SVE: This needs testing
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return INS_sve_mov;
#endif
}
Expand Down Expand Up @@ -2085,7 +2084,6 @@ instruction CodeGen::ins_Copy(regNumber srcReg, var_types dstType)
#if defined(TARGET_XARCH)
return INS_kmovq_gpr;
#elif defined(TARGET_ARM64)
unreached(); // TODO-SVE: This needs testing
return INS_sve_mov;
#endif
}
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9 changes: 8 additions & 1 deletion src/coreclr/jit/lsraarm64.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -1627,7 +1627,14 @@ int LinearScan::BuildHWIntrinsic(GenTreeHWIntrinsic* intrinsicTree, int* pDstCou
predMask = RBM_LOWMASK.GetPredicateRegSet();
}

srcCount += BuildOperandUses(intrin.op1, predMask);
if (tgtPrefOp2)
{
srcCount += BuildDelayFreeUses(intrin.op1, intrin.op2, predMask);
}
else
{
srcCount += BuildOperandUses(intrin.op1, predMask);
}
}
}
else if (intrinsicTree->OperIsMemoryLoadOrStore())
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Original file line number Diff line number Diff line change
Expand Up @@ -1016,6 +1016,79 @@ internal Arm64() { }
public static unsafe Vector<ulong> CreateFalseMaskUInt64() { throw new PlatformNotSupportedException(); }


/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<byte> CreateMaskForFirstActiveElement(Vector<byte> mask, Vector<byte> srcMask) { throw new PlatformNotSupportedException(); }

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<short> CreateMaskForFirstActiveElement(Vector<short> mask, Vector<short> srcMask) { throw new PlatformNotSupportedException(); }

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<int> CreateMaskForFirstActiveElement(Vector<int> mask, Vector<int> srcMask) { throw new PlatformNotSupportedException(); }

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<long> CreateMaskForFirstActiveElement(Vector<long> mask, Vector<long> srcMask) { throw new PlatformNotSupportedException(); }

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<sbyte> CreateMaskForFirstActiveElement(Vector<sbyte> mask, Vector<sbyte> srcMask) { throw new PlatformNotSupportedException(); }

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<ushort> CreateMaskForFirstActiveElement(Vector<ushort> mask, Vector<ushort> srcMask) { throw new PlatformNotSupportedException(); }

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<uint> CreateMaskForFirstActiveElement(Vector<uint> mask, Vector<uint> srcMask) { throw new PlatformNotSupportedException(); }

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<ulong> CreateMaskForFirstActiveElement(Vector<ulong> mask, Vector<ulong> srcMask) { throw new PlatformNotSupportedException(); }

/// <summary>
/// svbool_t svpnext_b8(svbool_t pg, svbool_t op)
/// PNEXT Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<byte> CreateMaskForNextActiveElement(Vector<byte> mask, Vector<byte> srcMask) { throw new PlatformNotSupportedException(); }

/// <summary>
/// svbool_t svpnext_b16(svbool_t pg, svbool_t op)
/// PNEXT Ptied.H, Pg, Ptied.H
/// </summary>
public static unsafe Vector<ushort> CreateMaskForNextActiveElement(Vector<ushort> mask, Vector<ushort> srcMask) { throw new PlatformNotSupportedException(); }

/// <summary>
/// svbool_t svpnext_b32(svbool_t pg, svbool_t op)
/// PNEXT Ptied.S, Pg, Ptied.S
/// </summary>
public static unsafe Vector<uint> CreateMaskForNextActiveElement(Vector<uint> mask, Vector<uint> srcMask) { throw new PlatformNotSupportedException(); }

/// <summary>
/// svbool_t svpnext_b64(svbool_t pg, svbool_t op)
/// PNEXT Ptied.D, Pg, Ptied.D
/// </summary>
public static unsafe Vector<ulong> CreateMaskForNextActiveElement(Vector<ulong> mask, Vector<ulong> srcMask) { throw new PlatformNotSupportedException(); }


/// CreateTrueMaskByte : Set predicate elements to true

/// <summary>
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Original file line number Diff line number Diff line change
Expand Up @@ -1073,6 +1073,79 @@ internal Arm64() { }
public static unsafe Vector<ulong> CreateFalseMaskUInt64() => CreateFalseMaskUInt64();


/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<byte> CreateMaskForFirstActiveElement(Vector<byte> mask, Vector<byte> srcMask) => CreateMaskForFirstActiveElement(mask, srcMask);

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<short> CreateMaskForFirstActiveElement(Vector<short> mask, Vector<short> srcMask) => CreateMaskForFirstActiveElement(mask, srcMask);

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<int> CreateMaskForFirstActiveElement(Vector<int> mask, Vector<int> srcMask) => CreateMaskForFirstActiveElement(mask, srcMask);

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<long> CreateMaskForFirstActiveElement(Vector<long> mask, Vector<long> srcMask) => CreateMaskForFirstActiveElement(mask, srcMask);

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<sbyte> CreateMaskForFirstActiveElement(Vector<sbyte> mask, Vector<sbyte> srcMask) => CreateMaskForFirstActiveElement(mask, srcMask);

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<ushort> CreateMaskForFirstActiveElement(Vector<ushort> mask, Vector<ushort> srcMask) => CreateMaskForFirstActiveElement(mask, srcMask);

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<uint> CreateMaskForFirstActiveElement(Vector<uint> mask, Vector<uint> srcMask) => CreateMaskForFirstActiveElement(mask, srcMask);

/// <summary>
/// svbool_t svpfirst[_b](svbool_t pg, svbool_t op)
/// PFIRST Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<ulong> CreateMaskForFirstActiveElement(Vector<ulong> mask, Vector<ulong> srcMask) => CreateMaskForFirstActiveElement(mask, srcMask);

/// <summary>
/// svbool_t svpnext_b8(svbool_t pg, svbool_t op)
/// PNEXT Ptied.B, Pg, Ptied.B
/// </summary>
public static unsafe Vector<byte> CreateMaskForNextActiveElement(Vector<byte> mask, Vector<byte> srcMask) => CreateMaskForNextActiveElement(mask, srcMask);

/// <summary>
/// svbool_t svpnext_b16(svbool_t pg, svbool_t op)
/// PNEXT Ptied.H, Pg, Ptied.H
/// </summary>
public static unsafe Vector<ushort> CreateMaskForNextActiveElement(Vector<ushort> mask, Vector<ushort> srcMask) => CreateMaskForNextActiveElement(mask, srcMask);

/// <summary>
/// svbool_t svpnext_b32(svbool_t pg, svbool_t op)
/// PNEXT Ptied.S, Pg, Ptied.S
/// </summary>
public static unsafe Vector<uint> CreateMaskForNextActiveElement(Vector<uint> mask, Vector<uint> srcMask) => CreateMaskForNextActiveElement(mask, srcMask);

/// <summary>
/// svbool_t svpnext_b64(svbool_t pg, svbool_t op)
/// PNEXT Ptied.D, Pg, Ptied.D
/// </summary>
public static unsafe Vector<ulong> CreateMaskForNextActiveElement(Vector<ulong> mask, Vector<ulong> srcMask) => CreateMaskForNextActiveElement(mask, srcMask);


/// CreateTrueMaskByte : Set predicate elements to true

/// <summary>
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Original file line number Diff line number Diff line change
Expand Up @@ -4335,6 +4335,20 @@ internal Arm64() { }
public static System.Numerics.Vector<ushort> CreateFalseMaskUInt16() { throw null; }
public static System.Numerics.Vector<uint> CreateFalseMaskUInt32() { throw null; }
public static System.Numerics.Vector<ulong> CreateFalseMaskUInt64() { throw null; }

public static unsafe System.Numerics.Vector<byte> CreateMaskForFirstActiveElement(System.Numerics.Vector<byte> mask, System.Numerics.Vector<byte> srcMask) { throw null; }
public static unsafe System.Numerics.Vector<short> CreateMaskForFirstActiveElement(System.Numerics.Vector<short> mask, System.Numerics.Vector<short> srcMask) { throw null; }
public static unsafe System.Numerics.Vector<int> CreateMaskForFirstActiveElement(System.Numerics.Vector<int> mask, System.Numerics.Vector<int> srcMask) { throw null; }
public static unsafe System.Numerics.Vector<long> CreateMaskForFirstActiveElement(System.Numerics.Vector<long> mask, System.Numerics.Vector<long> srcMask) { throw null; }
public static unsafe System.Numerics.Vector<sbyte> CreateMaskForFirstActiveElement(System.Numerics.Vector<sbyte> mask, System.Numerics.Vector<sbyte> srcMask) { throw null; }
public static unsafe System.Numerics.Vector<ushort> CreateMaskForFirstActiveElement(System.Numerics.Vector<ushort> mask, System.Numerics.Vector<ushort> srcMask) { throw null; }
public static unsafe System.Numerics.Vector<uint> CreateMaskForFirstActiveElement(System.Numerics.Vector<uint> mask, System.Numerics.Vector<uint> srcMask) { throw null; }
public static unsafe System.Numerics.Vector<ulong> CreateMaskForFirstActiveElement(System.Numerics.Vector<ulong> mask, System.Numerics.Vector<ulong> srcMask) { throw null; }
public static unsafe System.Numerics.Vector<byte> CreateMaskForNextActiveElement(System.Numerics.Vector<byte> mask, System.Numerics.Vector<byte> srcMask) { throw null; }
public static unsafe System.Numerics.Vector<ushort> CreateMaskForNextActiveElement(System.Numerics.Vector<ushort> mask, System.Numerics.Vector<ushort> srcMask) { throw null; }
public static unsafe System.Numerics.Vector<uint> CreateMaskForNextActiveElement(System.Numerics.Vector<uint> mask, System.Numerics.Vector<uint> srcMask) { throw null; }
public static unsafe System.Numerics.Vector<ulong> CreateMaskForNextActiveElement(System.Numerics.Vector<ulong> mask, System.Numerics.Vector<ulong> srcMask) { throw null; }

public static System.Numerics.Vector<byte> CreateTrueMaskByte([ConstantExpected] SveMaskPattern pattern = SveMaskPattern.All) { throw null; }
public static System.Numerics.Vector<double> CreateTrueMaskDouble([ConstantExpected] SveMaskPattern pattern = SveMaskPattern.All) { throw null; }
public static System.Numerics.Vector<short> CreateTrueMaskInt16([ConstantExpected] SveMaskPattern pattern = SveMaskPattern.All) { throw null; }
Expand Down
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