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Shader: Add fallback for LDG from "ube" buffer ranges. (#4027)

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We have a conversion from LDG on the compute shader to a special constant buffer binding that's used to exceed hardware limits on compute, but it was only running if the byte offset could be identified. The fallback that checks all of the bindings at runtime only checks the storage buffers.

This PR adds checking ube ranges to the LoadGlobal fallback. This extends the changes in #4011 to only check ube entries which are accessed by the shader.

Fixes particles affected by the wind in The Legend of Zelda: Breath of the Wild. May fix other weird issues with compute shaders in some games.

Try a bunch of games and drivers to make sure they don't blow up loading constants willynilly from searchable buffers.
This commit is contained in:
riperiperi 2022-12-06 23:15:44 +00:00 • committed by GitHub
parent e211c3f00a
commit f23b2878cc
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 108 additions and 25 deletions
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88
Ryujinx.Graphics.Shader/Translation/Rewriter.cs
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@ -1,3 +1,4 @@
using Ryujinx.Graphics.Shader.Decoders;
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using System.Collections.Generic;
using System.Diagnostics;
@ -89,12 +90,42 @@ namespace Ryujinx.Graphics.Shader.Translation
return local;
}
Operand PrependExistingOperation(Operation operation)
{
Operand local = Local();
operation.Dest = local;
node.List.AddBefore(node, operation);
return local;
}
Operand addrLow = operation.GetSource(0);
Operand addrHigh = operation.GetSource(1);
Operand sbBaseAddrLow = Const(0);
Operand sbSlot = Const(0);
Operand alignMask = Const(-config.GpuAccessor.QueryHostStorageBufferOffsetAlignment());
Operand BindingRangeCheck(int cbOffset, out Operand baseAddrLow)
{
baseAddrLow = Cbuf(0, cbOffset);
Operand baseAddrHigh = Cbuf(0, cbOffset + 1);
Operand size = Cbuf(0, cbOffset + 2);
Operand offset = PrependOperation(Instruction.Subtract, addrLow, baseAddrLow);
Operand borrow = PrependOperation(Instruction.CompareLessU32, addrLow, baseAddrLow);
Operand inRangeLow = PrependOperation(Instruction.CompareLessU32, offset, size);
Operand addrHighBorrowed = PrependOperation(Instruction.Add, addrHigh, borrow);
Operand inRangeHigh = PrependOperation(Instruction.CompareEqual, addrHighBorrowed, baseAddrHigh);
return PrependOperation(Instruction.BitwiseAnd, inRangeLow, inRangeHigh);
}
int sbUseMask = config.AccessibleStorageBuffersMask;
while (sbUseMask != 0)
@ -107,20 +138,7 @@ namespace Ryujinx.Graphics.Shader.Translation
int cbOffset = GetStorageCbOffset(config.Stage, slot);
Operand baseAddrLow = Cbuf(0, cbOffset);
Operand baseAddrHigh = Cbuf(0, cbOffset + 1);
Operand size = Cbuf(0, cbOffset + 2);
Operand offset = PrependOperation(Instruction.Subtract, addrLow, baseAddrLow);
Operand borrow = PrependOperation(Instruction.CompareLessU32, addrLow, baseAddrLow);
Operand inRangeLow = PrependOperation(Instruction.CompareLessU32, offset, size);
Operand addrHighBorrowed = PrependOperation(Instruction.Add, addrHigh, borrow);
Operand inRangeHigh = PrependOperation(Instruction.CompareEqual, addrHighBorrowed, baseAddrHigh);
Operand inRange = PrependOperation(Instruction.BitwiseAnd, inRangeLow, inRangeHigh);
Operand inRange = BindingRangeCheck(cbOffset, out Operand baseAddrLow);
sbBaseAddrLow = PrependOperation(Instruction.ConditionalSelect, inRange, baseAddrLow, sbBaseAddrLow);
sbSlot = PrependOperation(Instruction.ConditionalSelect, inRange, Const(slot), sbSlot);
@ -128,8 +146,6 @@ namespace Ryujinx.Graphics.Shader.Translation
if (config.AccessibleStorageBuffersMask != 0)
{
Operand alignMask = Const(-config.GpuAccessor.QueryHostStorageBufferOffsetAlignment());
Operand baseAddrTrunc = PrependOperation(Instruction.BitwiseAnd, sbBaseAddrLow, alignMask);
Operand byteOffset = PrependOperation(Instruction.Subtract, addrLow, baseAddrTrunc);
@ -178,6 +194,46 @@ namespace Ryujinx.Graphics.Shader.Translation
storageOp = new Operation(Instruction.Copy, operation.Dest, Const(0));
}
if (operation.Inst == Instruction.LoadGlobal)
{
int cbeUseMask = config.AccessibleConstantBuffersMask;
while (cbeUseMask != 0)
{
int slot = BitOperations.TrailingZeroCount(cbeUseMask);
int cbSlot = UbeFirstCbuf + slot;
cbeUseMask &= ~(1 << slot);
config.SetUsedConstantBuffer(cbSlot);
Operand previousResult = PrependExistingOperation(storageOp);
int cbOffset = GetConstantUbeOffset(slot);
Operand inRange = BindingRangeCheck(cbOffset, out Operand baseAddrLow);
Operand baseAddrTruncConst = PrependOperation(Instruction.BitwiseAnd, baseAddrLow, alignMask);
Operand byteOffsetConst = PrependOperation(Instruction.Subtract, addrLow, baseAddrTruncConst);
Operand cbIndex = PrependOperation(Instruction.ShiftRightU32, byteOffsetConst, Const(2));
Operand[] sourcesCb = new Operand[operation.SourcesCount];
sourcesCb[0] = Const(cbSlot);
sourcesCb[1] = cbIndex;
for (int index = 2; index < operation.SourcesCount; index++)
{
sourcesCb[index] = operation.GetSource(index);
}
Operand ldcResult = PrependOperation(Instruction.LoadConstant, sourcesCb);
storageOp = new Operation(Instruction.ConditionalSelect, operation.Dest, inRange, ldcResult, previousResult);
}
}
for (int index = 0; index < operation.SourcesCount; index++)
{
operation.SetSource(index, null);