aboutsummaryrefslogtreecommitdiff
path: root/src/Ryujinx.Graphics.Shader/Instructions/InstEmitAttribute.cs
blob: c704156bcbcf2cb81528b3a13cf60550a9274873 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
using Ryujinx.Graphics.Shader.Decoders;
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using Ryujinx.Graphics.Shader.Translation;

using static Ryujinx.Graphics.Shader.Instructions.InstEmitHelper;
using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;

namespace Ryujinx.Graphics.Shader.Instructions
{
    static partial class InstEmit
    {
        public static void Al2p(EmitterContext context)
        {
            InstAl2p op = context.GetOp<InstAl2p>();

            context.Copy(GetDest(op.Dest), context.IAdd(GetSrcReg(context, op.SrcA), Const(op.Imm11)));
        }

        public static void Ald(EmitterContext context)
        {
            InstAld op = context.GetOp<InstAld>();

            // Some of those attributes are per invocation,
            // so we should ignore any primitive vertex indexing for those.
            bool hasPrimitiveVertex = AttributeMap.HasPrimitiveVertex(context.TranslatorContext.Definitions.Stage, op.O) && !op.P;

            if (!op.Phys)
            {
                hasPrimitiveVertex &= HasPrimitiveVertex(op.Imm11);
            }

            Operand primVertex = hasPrimitiveVertex ? context.Copy(GetSrcReg(context, op.SrcB)) : null;

            for (int index = 0; index < (int)op.AlSize + 1; index++)
            {
                Register rd = new(op.Dest + index, RegisterType.Gpr);

                if (rd.IsRZ)
                {
                    break;
                }

                if (op.Phys)
                {
                    Operand offset = context.ISubtract(GetSrcReg(context, op.SrcA), Const(AttributeConsts.UserAttributeBase));
                    Operand vecIndex = context.ShiftRightU32(offset, Const(4));
                    Operand elemIndex = context.BitwiseAnd(context.ShiftRightU32(offset, Const(2)), Const(3));

                    StorageKind storageKind = op.O ? StorageKind.Output : StorageKind.Input;

                    context.Copy(Register(rd), context.Load(storageKind, IoVariable.UserDefined, primVertex, vecIndex, elemIndex));
                }
                else if (op.SrcB == RegisterConsts.RegisterZeroIndex || op.P)
                {
                    int offset = FixedFuncToUserAttribute(context.TranslatorContext, op.Imm11 + index * 4, op.O);
                    bool isOutput = op.O && CanLoadOutput(offset);

                    if (!op.P && !isOutput && TryConvertIdToIndexForVulkan(context, offset, out Operand value))
                    {
                        context.Copy(Register(rd), value);
                    }
                    else
                    {
                        value = AttributeMap.GenerateAttributeLoad(context, primVertex, offset, isOutput, op.P);

                        if ((!context.TranslatorContext.Definitions.SupportsScaledVertexFormats || context.VertexAsCompute) &&
                            context.TranslatorContext.Stage == ShaderStage.Vertex &&
                            !op.O &&
                            offset >= 0x80 &&
                            offset < 0x280)
                        {
                            // The host does not support scaled vertex formats,
                            // the emulator should use a integer format, and
                            // we compensate here inserting the conversion to float.

                            AttributeType type = context.TranslatorContext.Definitions.GetAttributeType((offset - 0x80) >> 4);

                            if (type == AttributeType.Sscaled)
                            {
                                value = context.IConvertS32ToFP32(value);
                            }
                            else if (type == AttributeType.Uscaled)
                            {
                                value = context.IConvertU32ToFP32(value);
                            }
                        }
                        else if (offset == AttributeConsts.PrimitiveId && context.TranslatorContext.Definitions.HalvePrimitiveId)
                        {
                            value = context.ShiftRightS32(value, Const(1));
                        }

                        context.Copy(Register(rd), value);
                    }
                }
                else
                {
                    int offset = FixedFuncToUserAttribute(context.TranslatorContext, op.Imm11 + index * 4, op.O);
                    bool isOutput = op.O && CanLoadOutput(offset);

                    context.Copy(Register(rd), AttributeMap.GenerateAttributeLoad(context, primVertex, offset, isOutput, false));
                }
            }
        }

        public static void Ast(EmitterContext context)
        {
            InstAst op = context.GetOp<InstAst>();

            for (int index = 0; index < (int)op.AlSize + 1; index++)
            {
                if (op.SrcB + index > RegisterConsts.RegisterZeroIndex)
                {
                    break;
                }

                Register rd = new(op.SrcB + index, RegisterType.Gpr);

                if (op.Phys)
                {
                    Operand offset = context.ISubtract(GetSrcReg(context, op.SrcA), Const(AttributeConsts.UserAttributeBase));
                    Operand vecIndex = context.ShiftRightU32(offset, Const(4));
                    Operand elemIndex = context.BitwiseAnd(context.ShiftRightU32(offset, Const(2)), Const(3));
                    Operand invocationId = AttributeMap.HasInvocationId(context.TranslatorContext.Definitions.Stage, isOutput: true)
                        ? context.Load(StorageKind.Input, IoVariable.InvocationId)
                        : null;

                    context.Store(StorageKind.Output, IoVariable.UserDefined, invocationId, vecIndex, elemIndex, Register(rd));
                }
                else
                {
                    // TODO: Support indirect stores using Ra.

                    int offset = op.Imm11 + index * 4;

                    if (!context.TranslatorContext.AttributeUsage.IsUsedOutputAttribute(offset))
                    {
                        return;
                    }

                    offset = FixedFuncToUserAttribute(context.TranslatorContext, offset, isOutput: true);
                    AttributeMap.GenerateAttributeStore(context, offset, op.P, Register(rd));
                }
            }
        }

        public static void Ipa(EmitterContext context)
        {
            InstIpa op = context.GetOp<InstIpa>();

            Operand res;

            bool isFixedFunc = false;

            if (op.Idx)
            {
                Operand offset = context.ISubtract(GetSrcReg(context, op.SrcA), Const(AttributeConsts.UserAttributeBase));
                Operand vecIndex = context.ShiftRightU32(offset, Const(4));
                Operand elemIndex = context.BitwiseAnd(context.ShiftRightU32(offset, Const(2)), Const(3));

                res = context.Load(StorageKind.Input, IoVariable.UserDefined, null, vecIndex, elemIndex);
                res = context.FPMultiply(res, context.Load(StorageKind.Input, IoVariable.FragmentCoord, null, Const(3)));
            }
            else
            {
                isFixedFunc = TryFixedFuncToUserAttributeIpa(context, op.Imm10, out res);

                if (op.Imm10 >= AttributeConsts.UserAttributeBase && op.Imm10 < AttributeConsts.UserAttributeEnd)
                {
                    int index = (op.Imm10 - AttributeConsts.UserAttributeBase) >> 4;

                    if (context.TranslatorContext.Definitions.ImapTypes[index].GetFirstUsedType() == PixelImap.Perspective)
                    {
                        res = context.FPMultiply(res, context.Load(StorageKind.Input, IoVariable.FragmentCoord, null, Const(3)));
                    }
                }
                else if (op.Imm10 == AttributeConsts.PositionX || op.Imm10 == AttributeConsts.PositionY)
                {
                    // FragCoord X/Y must be divided by the render target scale, if resolution scaling is active,
                    // because the shader code is not expecting scaled values.
                    res = context.FPDivide(res, context.Load(StorageKind.ConstantBuffer, SupportBuffer.Binding, Const((int)SupportBufferField.RenderScale), Const(0)));

                    if (op.Imm10 == AttributeConsts.PositionY && context.TranslatorContext.Options.TargetApi != TargetApi.OpenGL)
                    {
                        // If YNegate is enabled, we need to flip the fragment coordinates vertically, unless
                        // the API supports changing the origin (only OpenGL does).
                        if (context.TranslatorContext.Definitions.YNegateEnabled)
                        {
                            Operand viewportHeight = context.Load(StorageKind.ConstantBuffer, 0, Const((int)SupportBufferField.ViewportSize), Const(1));

                            res = context.FPSubtract(viewportHeight, res);
                        }
                    }
                }
                else if (op.Imm10 == AttributeConsts.PrimitiveId && context.TranslatorContext.Definitions.HalvePrimitiveId)
                {
                    // If quads are used, but the host does not support them, they need to be converted to triangles.
                    // Since each quad becomes 2 triangles, we need to compensate here and divide primitive ID by 2.
                    res = context.ShiftRightS32(res, Const(1));
                }
                else if (op.Imm10 == AttributeConsts.FrontFacing && context.TranslatorContext.GpuAccessor.QueryHostHasFrontFacingBug())
                {
                    // gl_FrontFacing sometimes has incorrect (flipped) values depending how it is accessed on Intel GPUs.
                    // This weird trick makes it behave.
                    res = context.ICompareLess(context.INegate(context.FP32ConvertToS32(context.ConditionalSelect(res, ConstF(1f), ConstF(0f)))), Const(0));
                }
            }

            if (op.IpaOp == IpaOp.Multiply && !isFixedFunc)
            {
                Operand srcB = GetSrcReg(context, op.SrcB);

                res = context.FPMultiply(res, srcB);
            }

            res = context.FPSaturate(res, op.Sat);

            context.Copy(GetDest(op.Dest), res);
        }

        public static void Isberd(EmitterContext context)
        {
            InstIsberd op = context.GetOp<InstIsberd>();

            // This instruction performs a load from ISBE (Internal Stage Buffer Entry) memory.
            // Here, we just propagate the offset, as the result from this instruction is usually
            // used with ALD to perform vertex load on geometry or tessellation shaders.
            // The offset is calculated as (PrimitiveIndex * VerticesPerPrimitive) + VertexIndex.
            // Since we hardcode PrimitiveIndex to zero, then the offset will be just VertexIndex.
            context.Copy(GetDest(op.Dest), GetSrcReg(context, op.SrcA));
        }

        public static void OutR(EmitterContext context)
        {
            InstOutR op = context.GetOp<InstOutR>();

            EmitOut(context, op.OutType.HasFlag(OutType.Emit), op.OutType.HasFlag(OutType.Cut));
        }

        public static void OutI(EmitterContext context)
        {
            InstOutI op = context.GetOp<InstOutI>();

            EmitOut(context, op.OutType.HasFlag(OutType.Emit), op.OutType.HasFlag(OutType.Cut));
        }

        public static void OutC(EmitterContext context)
        {
            InstOutC op = context.GetOp<InstOutC>();

            EmitOut(context, op.OutType.HasFlag(OutType.Emit), op.OutType.HasFlag(OutType.Cut));
        }

        private static void EmitOut(EmitterContext context, bool emit, bool cut)
        {
            if (!(emit || cut))
            {
                context.TranslatorContext.GpuAccessor.Log("Invalid OUT encoding.");
            }

            if (emit)
            {
                if (context.TranslatorContext.Definitions.LastInVertexPipeline)
                {
                    context.PrepareForVertexReturn(out var tempXLocal, out var tempYLocal, out var tempZLocal);

                    context.EmitVertex();

                    // Restore output position value before transformation.

                    if (tempXLocal != null)
                    {
                        context.Copy(context.Load(StorageKind.Input, IoVariable.Position, null, Const(0)), tempXLocal);
                    }

                    if (tempYLocal != null)
                    {
                        context.Copy(context.Load(StorageKind.Input, IoVariable.Position, null, Const(1)), tempYLocal);
                    }

                    if (tempZLocal != null)
                    {
                        context.Copy(context.Load(StorageKind.Input, IoVariable.Position, null, Const(2)), tempZLocal);
                    }
                }
                else
                {
                    context.EmitVertex();
                }
            }

            if (cut)
            {
                context.EndPrimitive();
            }
        }

        private static bool HasPrimitiveVertex(int attr)
        {
            return attr != AttributeConsts.PrimitiveId &&
                   attr != AttributeConsts.TessCoordX &&
                   attr != AttributeConsts.TessCoordY;
        }

        private static bool CanLoadOutput(int attr)
        {
            return attr != AttributeConsts.TessCoordX && attr != AttributeConsts.TessCoordY;
        }

        private static bool TryFixedFuncToUserAttributeIpa(EmitterContext context, int attr, out Operand selectedAttr)
        {
            if (attr >= AttributeConsts.FrontColorDiffuseR && attr < AttributeConsts.BackColorDiffuseR)
            {
                // TODO: If two sided rendering is enabled, then this should return
                // FrontColor if the fragment is front facing, and back color otherwise.
                selectedAttr = GenerateIpaLoad(context, FixedFuncToUserAttribute(context.TranslatorContext, attr, isOutput: false));
                return true;
            }
            else if (attr == AttributeConsts.FogCoord)
            {
                // TODO: We likely need to emulate the fixed-function functionality for FogCoord here.
                selectedAttr = GenerateIpaLoad(context, FixedFuncToUserAttribute(context.TranslatorContext, attr, isOutput: false));
                return true;
            }
            else if (attr >= AttributeConsts.BackColorDiffuseR && attr < AttributeConsts.ClipDistance0)
            {
                selectedAttr = ConstF(((attr >> 2) & 3) == 3 ? 1f : 0f);
                return true;
            }
            else if (attr >= AttributeConsts.TexCoordBase && attr < AttributeConsts.TexCoordEnd)
            {
                selectedAttr = GenerateIpaLoad(context, FixedFuncToUserAttribute(context.TranslatorContext, attr, isOutput: false));
                return true;
            }

            selectedAttr = GenerateIpaLoad(context, attr);
            return false;
        }

        private static Operand GenerateIpaLoad(EmitterContext context, int offset)
        {
            return AttributeMap.GenerateAttributeLoad(context, null, offset, isOutput: false, isPerPatch: false);
        }

        private static int FixedFuncToUserAttribute(TranslatorContext translatorContext, int attr, bool isOutput)
        {
            bool supportsLayerFromVertexOrTess = translatorContext.GpuAccessor.QueryHostSupportsLayerVertexTessellation();
            int fixedStartAttr = supportsLayerFromVertexOrTess ? 0 : 1;

            if (attr == AttributeConsts.Layer && translatorContext.Definitions.Stage != ShaderStage.Geometry && !supportsLayerFromVertexOrTess)
            {
                attr = FixedFuncToUserAttribute(translatorContext, attr, AttributeConsts.Layer, 0, isOutput);
                translatorContext.SetLayerOutputAttribute(attr);
            }
            else if (attr == AttributeConsts.FogCoord)
            {
                attr = FixedFuncToUserAttribute(translatorContext, attr, AttributeConsts.FogCoord, fixedStartAttr, isOutput);
            }
            else if (attr >= AttributeConsts.FrontColorDiffuseR && attr < AttributeConsts.ClipDistance0)
            {
                attr = FixedFuncToUserAttribute(translatorContext, attr, AttributeConsts.FrontColorDiffuseR, fixedStartAttr + 1, isOutput);
            }
            else if (attr >= AttributeConsts.TexCoordBase && attr < AttributeConsts.TexCoordEnd)
            {
                attr = FixedFuncToUserAttribute(translatorContext, attr, AttributeConsts.TexCoordBase, fixedStartAttr + 5, isOutput);
            }

            return attr;
        }

        private static int FixedFuncToUserAttribute(TranslatorContext translatorContext, int attr, int baseAttr, int baseIndex, bool isOutput)
        {
            int index = (attr - baseAttr) >> 4;
            int userAttrIndex = translatorContext.AttributeUsage.GetFreeUserAttribute(isOutput, baseIndex + index);

            if ((uint)userAttrIndex < Constants.MaxAttributes)
            {
                attr = AttributeConsts.UserAttributeBase + userAttrIndex * 16 + (attr & 0xf);
            }
            else
            {
                translatorContext.GpuAccessor.Log($"No enough user attributes for fixed attribute offset 0x{attr:X}.");
            }

            return attr;
        }

        private static bool TryConvertIdToIndexForVulkan(EmitterContext context, int attr, out Operand value)
        {
            if (context.TranslatorContext.Options.TargetApi == TargetApi.Vulkan)
            {
                if (attr == AttributeConsts.InstanceId)
                {
                    value = context.ISubtract(
                        context.Load(StorageKind.Input, IoVariable.InstanceIndex),
                        context.Load(StorageKind.Input, IoVariable.BaseInstance));
                    return true;
                }
                else if (attr == AttributeConsts.VertexId)
                {
                    value = context.Load(StorageKind.Input, IoVariable.VertexIndex);
                    return true;
                }
            }

            value = null;
            return false;
        }
    }
}