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Side by Side Diff: src/sksl/SkSLSPIRVCodeGenerator.cpp

Issue 1984363002: initial checkin of SkSL compiler (Closed) Base URL: https://skia.googlesource.com/skia@master
Patch Set: more updates, mostly SPIR-V Created 4 years, 5 months ago
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1 /*
2 * Copyright 2016 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "SkSLSPIRVCodeGenerator.h"
9
10 #include "string.h"
11
12 #include "GLSL.std.450.h"
13
14 #include "ir/SkSLExpressionStatement.h"
15 #include "ir/SkSLExtension.h"
16 #include "ir/SkSLIndexExpression.h"
17 #include "ir/SkSLVariableReference.h"
18
19 namespace SkSL {
20
21 #define SPIRV_DEBUG 0
22
23 static const int32_t SKSL_MAGIC = 0x0; // FIXME: we should probably register a magic number
24
25 void SPIRVCodeGenerator::setupIntrinsics() {
26 #define ALL_GLSL(x) std::make_tuple(kGLSL_STD_450_IntrinsicKind, GLSLstd450 ## x , GLSLstd450 ## x, \
27 GLSLstd450 ## x, GLSLstd450 ## x)
28 #define BY_TYPE_GLSL(ifFloat, ifInt, ifUInt) std::make_tuple(kGLSL_STD_450_Intri nsicKind, \
29 GLSLstd450 ## ifFlo at, \
30 GLSLstd450 ## ifInt , \
31 GLSLstd450 ## ifUIn t, \
32 SpvOpUndef)
33 #define SPECIAL(x) std::make_tuple(kSpecial_IntrinsicKind, k ## x ## _SpecialInt rinsic, \
34 k ## x ## _SpecialIntrinsic, k ## x ## _Speci alIntrinsic, \
35 k ## x ## _SpecialIntrinsic)
36 fIntrinsicMap["round"] = ALL_GLSL(Round);
37 fIntrinsicMap["roundEven"] = ALL_GLSL(RoundEven);
38 fIntrinsicMap["trunc"] = ALL_GLSL(Trunc);
39 fIntrinsicMap["abs"] = BY_TYPE_GLSL(FAbs, SAbs, SAbs);
40 fIntrinsicMap["sign"] = BY_TYPE_GLSL(FSign, SSign, SSign);
41 fIntrinsicMap["floor"] = ALL_GLSL(Floor);
42 fIntrinsicMap["ceil"] = ALL_GLSL(Ceil);
43 fIntrinsicMap["fract"] = ALL_GLSL(Fract);
44 fIntrinsicMap["radians"] = ALL_GLSL(Radians);
45 fIntrinsicMap["degrees"] = ALL_GLSL(Degrees);
46 fIntrinsicMap["sin"] = ALL_GLSL(Sin);
47 fIntrinsicMap["cos"] = ALL_GLSL(Cos);
48 fIntrinsicMap["tan"] = ALL_GLSL(Tan);
49 fIntrinsicMap["asin"] = ALL_GLSL(Asin);
50 fIntrinsicMap["acos"] = ALL_GLSL(Acos);
51 fIntrinsicMap["atan"] = SPECIAL(Atan);
52 fIntrinsicMap["sinh"] = ALL_GLSL(Sinh);
53 fIntrinsicMap["cosh"] = ALL_GLSL(Cosh);
54 fIntrinsicMap["tanh"] = ALL_GLSL(Tanh);
55 fIntrinsicMap["asinh"] = ALL_GLSL(Asinh);
56 fIntrinsicMap["acosh"] = ALL_GLSL(Acosh);
57 fIntrinsicMap["atanh"] = ALL_GLSL(Atanh);
58 fIntrinsicMap["pow"] = ALL_GLSL(Pow);
59 fIntrinsicMap["exp"] = ALL_GLSL(Exp);
60 fIntrinsicMap["log"] = ALL_GLSL(Log);
61 fIntrinsicMap["exp2"] = ALL_GLSL(Exp2);
62 fIntrinsicMap["log2"] = ALL_GLSL(Log2);
63 fIntrinsicMap["sqrt"] = ALL_GLSL(Sqrt);
64 fIntrinsicMap["inversesqrt"] = ALL_GLSL(InverseSqrt);
65 fIntrinsicMap["determinant"] = ALL_GLSL(Determinant);
66 fIntrinsicMap["matrixInverse"] = ALL_GLSL(MatrixInverse);
67 fIntrinsicMap["mod"] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOp FMod, SpvOpSMod,
68 SpvOpUMod, SpvOpUndef);
69 fIntrinsicMap["min"] = BY_TYPE_GLSL(FMin, SMin, UMin);
70 fIntrinsicMap["max"] = BY_TYPE_GLSL(FMax, SMax, UMax);
71 fIntrinsicMap["clamp"] = BY_TYPE_GLSL(FClamp, SClamp, UClamp);
72 fIntrinsicMap["dot"] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOp Dot, SpvOpUndef,
73 SpvOpUndef, SpvOpUndef);
74 fIntrinsicMap["mix"] = ALL_GLSL(FMix);
75 fIntrinsicMap["step"] = ALL_GLSL(Step);
76 fIntrinsicMap["smoothstep"] = ALL_GLSL(SmoothStep);
77 fIntrinsicMap["fma"] = ALL_GLSL(Fma);
78 fIntrinsicMap["frexp"] = ALL_GLSL(Frexp);
79 fIntrinsicMap["ldexp"] = ALL_GLSL(Ldexp);
80
81 #define PACK(type) fIntrinsicMap["pack" #type] = ALL_GLSL(Pack ## type); \
82 fIntrinsicMap["unpack" #type] = ALL_GLSL(Unpack ## type)
83 PACK(Snorm4x8);
84 PACK(Unorm4x8);
85 PACK(Snorm2x16);
86 PACK(Unorm2x16);
87 PACK(Half2x16);
88 PACK(Double2x32);
89 fIntrinsicMap["length"] = ALL_GLSL(Length);
90 fIntrinsicMap["distance"] = ALL_GLSL(Distance);
91 fIntrinsicMap["cross"] = ALL_GLSL(Cross);
92 fIntrinsicMap["normalize"] = ALL_GLSL(Normalize);
93 fIntrinsicMap["faceForward"] = ALL_GLSL(FaceForward);
94 fIntrinsicMap["reflect"] = ALL_GLSL(Reflect);
95 fIntrinsicMap["refract"] = ALL_GLSL(Refract);
96 fIntrinsicMap["findLSB"] = ALL_GLSL(FindILsb);
97 fIntrinsicMap["findMSB"] = BY_TYPE_GLSL(FindSMsb, FindSMsb, FindUMsb);
98 fIntrinsicMap["dFdx"] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpDP dx, SpvOpUndef,
99 SpvOpUndef, SpvOpUndef);
100 fIntrinsicMap["dFdy"] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpDP dy, SpvOpUndef,
101 SpvOpUndef, SpvOpUndef);
102 fIntrinsicMap["dFdy"] = std::make_tuple(kSPIRV_IntrinsicKind, SpvOpDP dy, SpvOpUndef,
103 SpvOpUndef, SpvOpUndef);
104 fIntrinsicMap["texture"] = SPECIAL(Texture);
105 fIntrinsicMap["texture2D"] = SPECIAL(Texture2D);
106 fIntrinsicMap["textureProj"] = SPECIAL(TextureProj);
107
108 fIntrinsicMap["any"] = std::make_tuple(kSPIRV_IntrinsicKind, Sp vOpUndef,
109 SpvOpUndef, SpvOpUndef, SpvOpAny);
110 fIntrinsicMap["all"] = std::make_tuple(kSPIRV_IntrinsicKind, Sp vOpUndef,
111 SpvOpUndef, SpvOpUndef, SpvOpAll);
112 fIntrinsicMap["equal"] = std::make_tuple(kSPIRV_IntrinsicKind, Sp vOpFOrdEqual,
113 SpvOpIEqual, SpvOpIEqual ,
114 SpvOpLogicalEqual);
115 fIntrinsicMap["notEqual"] = std::make_tuple(kSPIRV_IntrinsicKind, Sp vOpFOrdNotEqual,
116 SpvOpINotEqual, SpvOpINo tEqual,
117 SpvOpLogicalNotEqual);
118 fIntrinsicMap["lessThan"] = std::make_tuple(kSPIRV_IntrinsicKind, Sp vOpSLessThan,
119 SpvOpULessThan, SpvOpFOr dLessThan,
120 SpvOpUndef);
121 fIntrinsicMap["lessThanEqual"] = std::make_tuple(kSPIRV_IntrinsicKind, Sp vOpSLessThanEqual,
122 SpvOpULessThanEqual, Spv OpFOrdLessThanEqual,
123 SpvOpUndef);
124 fIntrinsicMap["greaterThan"] = std::make_tuple(kSPIRV_IntrinsicKind, Sp vOpSGreaterThan,
125 SpvOpUGreaterThan, SpvOp FOrdGreaterThan,
126 SpvOpUndef);
127 fIntrinsicMap["greaterThanEqual"] = std::make_tuple(kSPIRV_IntrinsicKind,
128 SpvOpSGreaterThanEqual,
129 SpvOpUGreaterThanEqual,
130 SpvOpFOrdGreaterThanEqua l,
131 SpvOpUndef);
132
133 // interpolateAt* not yet supported...
134 }
135
136 void SPIRVCodeGenerator::writeWord(int32_t word, std::ostream& out) {
137 #if SPIRV_DEBUG
138 out << "(" << word << ") ";
139 #else
140 out.write((const char*) &word, sizeof(word));
141 #endif
142 }
143
144 static bool is_float(const Type& type) {
145 if (type.kind() == Type::kVector_Kind) {
146 return is_float(*type.componentType());
147 }
148 return type == *kFloat_Type || type == *kDouble_Type;
149 }
150
151 static bool is_signed(const Type& type) {
152 if (type.kind() == Type::kVector_Kind) {
153 return is_signed(*type.componentType());
154 }
155 return type == *kInt_Type;
156 }
157
158 static bool is_unsigned(const Type& type) {
159 if (type.kind() == Type::kVector_Kind) {
160 return is_unsigned(*type.componentType());
161 }
162 return type == *kUInt_Type;
163 }
164
165 static bool is_bool(const Type& type) {
166 if (type.kind() == Type::kVector_Kind) {
167 return is_bool(*type.componentType());
168 }
169 return type == *kBool_Type;
170 }
171
172 static bool is_out(std::shared_ptr<Variable> var) {
173 return (var->fModifiers.fFlags & Modifiers::kOut_Flag) != 0;
174 }
175
176 #if SPIRV_DEBUG
177 static std::string opcode_text(SpvOp_ opCode) {
178 switch (opCode) {
179 case SpvOpNop:
180 return "Nop";
181 case SpvOpUndef:
182 return "Undef";
183 case SpvOpSourceContinued:
184 return "SourceContinued";
185 case SpvOpSource:
186 return "Source";
187 case SpvOpSourceExtension:
188 return "SourceExtension";
189 case SpvOpName:
190 return "Name";
191 case SpvOpMemberName:
192 return "MemberName";
193 case SpvOpString:
194 return "String";
195 case SpvOpLine:
196 return "Line";
197 case SpvOpExtension:
198 return "Extension";
199 case SpvOpExtInstImport:
200 return "ExtInstImport";
201 case SpvOpExtInst:
202 return "ExtInst";
203 case SpvOpMemoryModel:
204 return "MemoryModel";
205 case SpvOpEntryPoint:
206 return "EntryPoint";
207 case SpvOpExecutionMode:
208 return "ExecutionMode";
209 case SpvOpCapability:
210 return "Capability";
211 case SpvOpTypeVoid:
212 return "TypeVoid";
213 case SpvOpTypeBool:
214 return "TypeBool";
215 case SpvOpTypeInt:
216 return "TypeInt";
217 case SpvOpTypeFloat:
218 return "TypeFloat";
219 case SpvOpTypeVector:
220 return "TypeVector";
221 case SpvOpTypeMatrix:
222 return "TypeMatrix";
223 case SpvOpTypeImage:
224 return "TypeImage";
225 case SpvOpTypeSampler:
226 return "TypeSampler";
227 case SpvOpTypeSampledImage:
228 return "TypeSampledImage";
229 case SpvOpTypeArray:
230 return "TypeArray";
231 case SpvOpTypeRuntimeArray:
232 return "TypeRuntimeArray";
233 case SpvOpTypeStruct:
234 return "TypeStruct";
235 case SpvOpTypeOpaque:
236 return "TypeOpaque";
237 case SpvOpTypePointer:
238 return "TypePointer";
239 case SpvOpTypeFunction:
240 return "TypeFunction";
241 case SpvOpTypeEvent:
242 return "TypeEvent";
243 case SpvOpTypeDeviceEvent:
244 return "TypeDeviceEvent";
245 case SpvOpTypeReserveId:
246 return "TypeReserveId";
247 case SpvOpTypeQueue:
248 return "TypeQueue";
249 case SpvOpTypePipe:
250 return "TypePipe";
251 case SpvOpTypeForwardPointer:
252 return "TypeForwardPointer";
253 case SpvOpConstantTrue:
254 return "ConstantTrue";
255 case SpvOpConstantFalse:
256 return "ConstantFalse";
257 case SpvOpConstant:
258 return "Constant";
259 case SpvOpConstantComposite:
260 return "ConstantComposite";
261 case SpvOpConstantSampler:
262 return "ConstantSampler";
263 case SpvOpConstantNull:
264 return "ConstantNull";
265 case SpvOpSpecConstantTrue:
266 return "SpecConstantTrue";
267 case SpvOpSpecConstantFalse:
268 return "SpecConstantFalse";
269 case SpvOpSpecConstant:
270 return "SpecConstant";
271 case SpvOpSpecConstantComposite:
272 return "SpecConstantComposite";
273 case SpvOpSpecConstantOp:
274 return "SpecConstantOp";
275 case SpvOpFunction:
276 return "Function";
277 case SpvOpFunctionParameter:
278 return "FunctionParameter";
279 case SpvOpFunctionEnd:
280 return "FunctionEnd";
281 case SpvOpFunctionCall:
282 return "FunctionCall";
283 case SpvOpVariable:
284 return "Variable";
285 case SpvOpImageTexelPointer:
286 return "ImageTexelPointer";
287 case SpvOpLoad:
288 return "Load";
289 case SpvOpStore:
290 return "Store";
291 case SpvOpCopyMemory:
292 return "CopyMemory";
293 case SpvOpCopyMemorySized:
294 return "CopyMemorySized";
295 case SpvOpAccessChain:
296 return "AccessChain";
297 case SpvOpInBoundsAccessChain:
298 return "InBoundsAccessChain";
299 case SpvOpPtrAccessChain:
300 return "PtrAccessChain";
301 case SpvOpArrayLength:
302 return "ArrayLength";
303 case SpvOpGenericPtrMemSemantics:
304 return "GenericPtrMemSemantics";
305 case SpvOpInBoundsPtrAccessChain:
306 return "InBoundsPtrAccessChain";
307 case SpvOpDecorate:
308 return "Decorate";
309 case SpvOpMemberDecorate:
310 return "MemberDecorate";
311 case SpvOpDecorationGroup:
312 return "DecorationGroup";
313 case SpvOpGroupDecorate:
314 return "GroupDecorate";
315 case SpvOpGroupMemberDecorate:
316 return "GroupMemberDecorate";
317 case SpvOpVectorExtractDynamic:
318 return "VectorExtractDynamic";
319 case SpvOpVectorInsertDynamic:
320 return "VectorInsertDynamic";
321 case SpvOpVectorShuffle:
322 return "VectorShuffle";
323 case SpvOpCompositeConstruct:
324 return "CompositeConstruct";
325 case SpvOpCompositeExtract:
326 return "CompositeExtract";
327 case SpvOpCompositeInsert:
328 return "CompositeInsert";
329 case SpvOpCopyObject:
330 return "CopyObject";
331 case SpvOpTranspose:
332 return "Transpose";
333 case SpvOpSampledImage:
334 return "SampledImage";
335 case SpvOpImageSampleImplicitLod:
336 return "ImageSampleImplicitLod";
337 case SpvOpImageSampleExplicitLod:
338 return "ImageSampleExplicitLod";
339 case SpvOpImageSampleDrefImplicitLod:
340 return "ImageSampleDrefImplicitLod";
341 case SpvOpImageSampleDrefExplicitLod:
342 return "ImageSampleDrefExplicitLod";
343 case SpvOpImageSampleProjImplicitLod:
344 return "ImageSampleProjImplicitLod";
345 case SpvOpImageSampleProjExplicitLod:
346 return "ImageSampleProjExplicitLod";
347 case SpvOpImageSampleProjDrefImplicitLod:
348 return "ImageSampleProjDrefImplicitLod";
349 case SpvOpImageSampleProjDrefExplicitLod:
350 return "ImageSampleProjDrefExplicitLod";
351 case SpvOpImageFetch:
352 return "ImageFetch";
353 case SpvOpImageGather:
354 return "ImageGather";
355 case SpvOpImageDrefGather:
356 return "ImageDrefGather";
357 case SpvOpImageRead:
358 return "ImageRead";
359 case SpvOpImageWrite:
360 return "ImageWrite";
361 case SpvOpImage:
362 return "Image";
363 case SpvOpImageQueryFormat:
364 return "ImageQueryFormat";
365 case SpvOpImageQueryOrder:
366 return "ImageQueryOrder";
367 case SpvOpImageQuerySizeLod:
368 return "ImageQuerySizeLod";
369 case SpvOpImageQuerySize:
370 return "ImageQuerySize";
371 case SpvOpImageQueryLod:
372 return "ImageQueryLod";
373 case SpvOpImageQueryLevels:
374 return "ImageQueryLevels";
375 case SpvOpImageQuerySamples:
376 return "ImageQuerySamples";
377 case SpvOpConvertFToU:
378 return "ConvertFToU";
379 case SpvOpConvertFToS:
380 return "ConvertFToS";
381 case SpvOpConvertSToF:
382 return "ConvertSToF";
383 case SpvOpConvertUToF:
384 return "ConvertUToF";
385 case SpvOpUConvert:
386 return "UConvert";
387 case SpvOpSConvert:
388 return "SConvert";
389 case SpvOpFConvert:
390 return "FConvert";
391 case SpvOpQuantizeToF16:
392 return "QuantizeToF16";
393 case SpvOpConvertPtrToU:
394 return "ConvertPtrToU";
395 case SpvOpSatConvertSToU:
396 return "SatConvertSToU";
397 case SpvOpSatConvertUToS:
398 return "SatConvertUToS";
399 case SpvOpConvertUToPtr:
400 return "ConvertUToPtr";
401 case SpvOpPtrCastToGeneric:
402 return "PtrCastToGeneric";
403 case SpvOpGenericCastToPtr:
404 return "GenericCastToPtr";
405 case SpvOpGenericCastToPtrExplicit:
406 return "GenericCastToPtrExplicit";
407 case SpvOpBitcast:
408 return "Bitcast";
409 case SpvOpSNegate:
410 return "SNegate";
411 case SpvOpFNegate:
412 return "FNegate";
413 case SpvOpIAdd:
414 return "IAdd";
415 case SpvOpFAdd:
416 return "FAdd";
417 case SpvOpISub:
418 return "ISub";
419 case SpvOpFSub:
420 return "FSub";
421 case SpvOpIMul:
422 return "IMul";
423 case SpvOpFMul:
424 return "FMul";
425 case SpvOpUDiv:
426 return "UDiv";
427 case SpvOpSDiv:
428 return "SDiv";
429 case SpvOpFDiv:
430 return "FDiv";
431 case SpvOpUMod:
432 return "UMod";
433 case SpvOpSRem:
434 return "SRem";
435 case SpvOpSMod:
436 return "SMod";
437 case SpvOpFRem:
438 return "FRem";
439 case SpvOpFMod:
440 return "FMod";
441 case SpvOpVectorTimesScalar:
442 return "VectorTimesScalar";
443 case SpvOpMatrixTimesScalar:
444 return "MatrixTimesScalar";
445 case SpvOpVectorTimesMatrix:
446 return "VectorTimesMatrix";
447 case SpvOpMatrixTimesVector:
448 return "MatrixTimesVector";
449 case SpvOpMatrixTimesMatrix:
450 return "MatrixTimesMatrix";
451 case SpvOpOuterProduct:
452 return "OuterProduct";
453 case SpvOpDot:
454 return "Dot";
455 case SpvOpIAddCarry:
456 return "IAddCarry";
457 case SpvOpISubBorrow:
458 return "ISubBorrow";
459 case SpvOpUMulExtended:
460 return "UMulExtended";
461 case SpvOpSMulExtended:
462 return "SMulExtended";
463 case SpvOpAny:
464 return "Any";
465 case SpvOpAll:
466 return "All";
467 case SpvOpIsNan:
468 return "IsNan";
469 case SpvOpIsInf:
470 return "IsInf";
471 case SpvOpIsFinite:
472 return "IsFinite";
473 case SpvOpIsNormal:
474 return "IsNormal";
475 case SpvOpSignBitSet:
476 return "SignBitSet";
477 case SpvOpLessOrGreater:
478 return "LessOrGreater";
479 case SpvOpOrdered:
480 return "Ordered";
481 case SpvOpUnordered:
482 return "Unordered";
483 case SpvOpLogicalEqual:
484 return "LogicalEqual";
485 case SpvOpLogicalNotEqual:
486 return "LogicalNotEqual";
487 case SpvOpLogicalOr:
488 return "LogicalOr";
489 case SpvOpLogicalAnd:
490 return "LogicalAnd";
491 case SpvOpLogicalNot:
492 return "LogicalNot";
493 case SpvOpSelect:
494 return "Select";
495 case SpvOpIEqual:
496 return "IEqual";
497 case SpvOpINotEqual:
498 return "INotEqual";
499 case SpvOpUGreaterThan:
500 return "UGreaterThan";
501 case SpvOpSGreaterThan:
502 return "SGreaterThan";
503 case SpvOpUGreaterThanEqual:
504 return "UGreaterThanEqual";
505 case SpvOpSGreaterThanEqual:
506 return "SGreaterThanEqual";
507 case SpvOpULessThan:
508 return "ULessThan";
509 case SpvOpSLessThan:
510 return "SLessThan";
511 case SpvOpULessThanEqual:
512 return "ULessThanEqual";
513 case SpvOpSLessThanEqual:
514 return "SLessThanEqual";
515 case SpvOpFOrdEqual:
516 return "FOrdEqual";
517 case SpvOpFUnordEqual:
518 return "FUnordEqual";
519 case SpvOpFOrdNotEqual:
520 return "FOrdNotEqual";
521 case SpvOpFUnordNotEqual:
522 return "FUnordNotEqual";
523 case SpvOpFOrdLessThan:
524 return "FOrdLessThan";
525 case SpvOpFUnordLessThan:
526 return "FUnordLessThan";
527 case SpvOpFOrdGreaterThan:
528 return "FOrdGreaterThan";
529 case SpvOpFUnordGreaterThan:
530 return "FUnordGreaterThan";
531 case SpvOpFOrdLessThanEqual:
532 return "FOrdLessThanEqual";
533 case SpvOpFUnordLessThanEqual:
534 return "FUnordLessThanEqual";
535 case SpvOpFOrdGreaterThanEqual:
536 return "FOrdGreaterThanEqual";
537 case SpvOpFUnordGreaterThanEqual:
538 return "FUnordGreaterThanEqual";
539 case SpvOpShiftRightLogical:
540 return "ShiftRightLogical";
541 case SpvOpShiftRightArithmetic:
542 return "ShiftRightArithmetic";
543 case SpvOpShiftLeftLogical:
544 return "ShiftLeftLogical";
545 case SpvOpBitwiseOr:
546 return "BitwiseOr";
547 case SpvOpBitwiseXor:
548 return "BitwiseXor";
549 case SpvOpBitwiseAnd:
550 return "BitwiseAnd";
551 case SpvOpNot:
552 return "Not";
553 case SpvOpBitFieldInsert:
554 return "BitFieldInsert";
555 case SpvOpBitFieldSExtract:
556 return "BitFieldSExtract";
557 case SpvOpBitFieldUExtract:
558 return "BitFieldUExtract";
559 case SpvOpBitReverse:
560 return "BitReverse";
561 case SpvOpBitCount:
562 return "BitCount";
563 case SpvOpDPdx:
564 return "DPdx";
565 case SpvOpDPdy:
566 return "DPdy";
567 case SpvOpFwidth:
568 return "Fwidth";
569 case SpvOpDPdxFine:
570 return "DPdxFine";
571 case SpvOpDPdyFine:
572 return "DPdyFine";
573 case SpvOpFwidthFine:
574 return "FwidthFine";
575 case SpvOpDPdxCoarse:
576 return "DPdxCoarse";
577 case SpvOpDPdyCoarse:
578 return "DPdyCoarse";
579 case SpvOpFwidthCoarse:
580 return "FwidthCoarse";
581 case SpvOpEmitVertex:
582 return "EmitVertex";
583 case SpvOpEndPrimitive:
584 return "EndPrimitive";
585 case SpvOpEmitStreamVertex:
586 return "EmitStreamVertex";
587 case SpvOpEndStreamPrimitive:
588 return "EndStreamPrimitive";
589 case SpvOpControlBarrier:
590 return "ControlBarrier";
591 case SpvOpMemoryBarrier:
592 return "MemoryBarrier";
593 case SpvOpAtomicLoad:
594 return "AtomicLoad";
595 case SpvOpAtomicStore:
596 return "AtomicStore";
597 case SpvOpAtomicExchange:
598 return "AtomicExchange";
599 case SpvOpAtomicCompareExchange:
600 return "AtomicCompareExchange";
601 case SpvOpAtomicCompareExchangeWeak:
602 return "AtomicCompareExchangeWeak";
603 case SpvOpAtomicIIncrement:
604 return "AtomicIIncrement";
605 case SpvOpAtomicIDecrement:
606 return "AtomicIDecrement";
607 case SpvOpAtomicIAdd:
608 return "AtomicIAdd";
609 case SpvOpAtomicISub:
610 return "AtomicISub";
611 case SpvOpAtomicSMin:
612 return "AtomicSMin";
613 case SpvOpAtomicUMin:
614 return "AtomicUMin";
615 case SpvOpAtomicSMax:
616 return "AtomicSMax";
617 case SpvOpAtomicUMax:
618 return "AtomicUMax";
619 case SpvOpAtomicAnd:
620 return "AtomicAnd";
621 case SpvOpAtomicOr:
622 return "AtomicOr";
623 case SpvOpAtomicXor:
624 return "AtomicXor";
625 case SpvOpPhi:
626 return "Phi";
627 case SpvOpLoopMerge:
628 return "LoopMerge";
629 case SpvOpSelectionMerge:
630 return "SelectionMerge";
631 case SpvOpLabel:
632 return "Label";
633 case SpvOpBranch:
634 return "Branch";
635 case SpvOpBranchConditional:
636 return "BranchConditional";
637 case SpvOpSwitch:
638 return "Switch";
639 case SpvOpKill:
640 return "Kill";
641 case SpvOpReturn:
642 return "Return";
643 case SpvOpReturnValue:
644 return "ReturnValue";
645 case SpvOpUnreachable:
646 return "Unreachable";
647 case SpvOpLifetimeStart:
648 return "LifetimeStart";
649 case SpvOpLifetimeStop:
650 return "LifetimeStop";
651 case SpvOpGroupAsyncCopy:
652 return "GroupAsyncCopy";
653 case SpvOpGroupWaitEvents:
654 return "GroupWaitEvents";
655 case SpvOpGroupAll:
656 return "GroupAll";
657 case SpvOpGroupAny:
658 return "GroupAny";
659 case SpvOpGroupBroadcast:
660 return "GroupBroadcast";
661 case SpvOpGroupIAdd:
662 return "GroupIAdd";
663 case SpvOpGroupFAdd:
664 return "GroupFAdd";
665 case SpvOpGroupFMin:
666 return "GroupFMin";
667 case SpvOpGroupUMin:
668 return "GroupUMin";
669 case SpvOpGroupSMin:
670 return "GroupSMin";
671 case SpvOpGroupFMax:
672 return "GroupFMax";
673 case SpvOpGroupUMax:
674 return "GroupUMax";
675 case SpvOpGroupSMax:
676 return "GroupSMax";
677 case SpvOpReadPipe:
678 return "ReadPipe";
679 case SpvOpWritePipe:
680 return "WritePipe";
681 case SpvOpReservedReadPipe:
682 return "ReservedReadPipe";
683 case SpvOpReservedWritePipe:
684 return "ReservedWritePipe";
685 case SpvOpReserveReadPipePackets:
686 return "ReserveReadPipePackets";
687 case SpvOpReserveWritePipePackets:
688 return "ReserveWritePipePackets";
689 case SpvOpCommitReadPipe:
690 return "CommitReadPipe";
691 case SpvOpCommitWritePipe:
692 return "CommitWritePipe";
693 case SpvOpIsValidReserveId:
694 return "IsValidReserveId";
695 case SpvOpGetNumPipePackets:
696 return "GetNumPipePackets";
697 case SpvOpGetMaxPipePackets:
698 return "GetMaxPipePackets";
699 case SpvOpGroupReserveReadPipePackets:
700 return "GroupReserveReadPipePackets";
701 case SpvOpGroupReserveWritePipePackets:
702 return "GroupReserveWritePipePackets";
703 case SpvOpGroupCommitReadPipe:
704 return "GroupCommitReadPipe";
705 case SpvOpGroupCommitWritePipe:
706 return "GroupCommitWritePipe";
707 case SpvOpEnqueueMarker:
708 return "EnqueueMarker";
709 case SpvOpEnqueueKernel:
710 return "EnqueueKernel";
711 case SpvOpGetKernelNDrangeSubGroupCount:
712 return "GetKernelNDrangeSubGroupCount";
713 case SpvOpGetKernelNDrangeMaxSubGroupSize:
714 return "GetKernelNDrangeMaxSubGroupSize";
715 case SpvOpGetKernelWorkGroupSize:
716 return "GetKernelWorkGroupSize";
717 case SpvOpGetKernelPreferredWorkGroupSizeMultiple:
718 return "GetKernelPreferredWorkGroupSizeMultiple";
719 case SpvOpRetainEvent:
720 return "RetainEvent";
721 case SpvOpReleaseEvent:
722 return "ReleaseEvent";
723 case SpvOpCreateUserEvent:
724 return "CreateUserEvent";
725 case SpvOpIsValidEvent:
726 return "IsValidEvent";
727 case SpvOpSetUserEventStatus:
728 return "SetUserEventStatus";
729 case SpvOpCaptureEventProfilingInfo:
730 return "CaptureEventProfilingInfo";
731 case SpvOpGetDefaultQueue:
732 return "GetDefaultQueue";
733 case SpvOpBuildNDRange:
734 return "BuildNDRange";
735 case SpvOpImageSparseSampleImplicitLod:
736 return "ImageSparseSampleImplicitLod";
737 case SpvOpImageSparseSampleExplicitLod:
738 return "ImageSparseSampleExplicitLod";
739 case SpvOpImageSparseSampleDrefImplicitLod:
740 return "ImageSparseSampleDrefImplicitLod";
741 case SpvOpImageSparseSampleDrefExplicitLod:
742 return "ImageSparseSampleDrefExplicitLod";
743 case SpvOpImageSparseSampleProjImplicitLod:
744 return "ImageSparseSampleProjImplicitLod";
745 case SpvOpImageSparseSampleProjExplicitLod:
746 return "ImageSparseSampleProjExplicitLod";
747 case SpvOpImageSparseSampleProjDrefImplicitLod:
748 return "ImageSparseSampleProjDrefImplicitLod";
749 case SpvOpImageSparseSampleProjDrefExplicitLod:
750 return "ImageSparseSampleProjDrefExplicitLod";
751 case SpvOpImageSparseFetch:
752 return "ImageSparseFetch";
753 case SpvOpImageSparseGather:
754 return "ImageSparseGather";
755 case SpvOpImageSparseDrefGather:
756 return "ImageSparseDrefGather";
757 case SpvOpImageSparseTexelsResident:
758 return "ImageSparseTexelsResident";
759 case SpvOpNoLine:
760 return "NoLine";
761 case SpvOpAtomicFlagTestAndSet:
762 return "AtomicFlagTestAndSet";
763 case SpvOpAtomicFlagClear:
764 return "AtomicFlagClear";
765 case SpvOpImageSparseRead:
766 return "ImageSparseRead";
767 default:
768 ABORT("unsupported SPIR-V op");
769 }
770 }
771 #endif
772
773 void SPIRVCodeGenerator::writeOpCode(SpvOp_ opCode, int length, std::ostream& ou t) {
774 ASSERT(opCode != SpvOpUndef);
775 switch (opCode) {
776 case SpvOpReturn: // fall through
777 case SpvOpReturnValue: // fall through
778 case SpvOpBranch: // fall through
779 case SpvOpBranchConditional:
780 ASSERT(fCurrentBlock);
781 fCurrentBlock = 0;
782 break;
783 case SpvOpConstant: // fall through
784 case SpvOpConstantTrue: // fall through
785 case SpvOpConstantFalse: // fall through
786 case SpvOpConstantComposite: // fall through
787 case SpvOpTypeVoid: // fall through
788 case SpvOpTypeInt: // fall through
789 case SpvOpTypeFloat: // fall through
790 case SpvOpTypeBool: // fall through
791 case SpvOpTypeVector: // fall through
792 case SpvOpTypeMatrix: // fall through
793 case SpvOpTypeArray: // fall through
794 case SpvOpTypePointer: // fall through
795 case SpvOpTypeFunction: // fall through
796 case SpvOpTypeRuntimeArray: // fall through
797 case SpvOpTypeStruct: // fall through
798 case SpvOpTypeImage: // fall through
799 case SpvOpTypeSampledImage: // fall through
800 case SpvOpVariable: // fall through
801 case SpvOpFunction: // fall through
802 case SpvOpFunctionParameter: // fall through
803 case SpvOpFunctionEnd: // fall through
804 case SpvOpExecutionMode: // fall through
805 case SpvOpMemoryModel: // fall through
806 case SpvOpCapability: // fall through
807 case SpvOpExtInstImport: // fall through
808 case SpvOpEntryPoint: // fall through
809 case SpvOpSource: // fall through
810 case SpvOpSourceExtension: // fall through
811 case SpvOpName: // fall through
812 case SpvOpMemberName: // fall through
813 case SpvOpDecorate: // fall through
814 case SpvOpMemberDecorate:
815 break;
816 default:
817 ASSERT(fCurrentBlock);
818 }
819 #if SPIRV_DEBUG
820 out << std::endl << opcode_text(opCode) << " ";
821 #else
822 this->writeWord((length << 16) | opCode, out);
823 #endif
824 }
825
826 void SPIRVCodeGenerator::writeLabel(SpvId label, std::ostream& out) {
827 fCurrentBlock = label;
828 this->writeInstruction(SpvOpLabel, label, out);
829 }
830
831 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, std::ostream& out) {
832 this->writeOpCode(opCode, 1, out);
833 }
834
835 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, std::ost ream& out) {
836 this->writeOpCode(opCode, 2, out);
837 this->writeWord(word1, out);
838 }
839
840 void SPIRVCodeGenerator::writeString(const char* string, std::ostream& out) {
841 size_t length = strlen(string);
842 out << string;
843 switch (length % 4) {
844 case 1:
845 out << (char) 0;
846 // fall through
847 case 2:
848 out << (char) 0;
849 // fall through
850 case 3:
851 out << (char) 0;
852 break;
853 default:
854 this->writeWord(0, out);
855 }
856 }
857
858 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, const char* string, std ::ostream& out) {
859 int32_t length = (int32_t) strlen(string);
860 this->writeOpCode(opCode, 1 + (length + 4) / 4, out);
861 this->writeString(string, out);
862 }
863
864
865 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, const ch ar* string,
866 std::ostream& out) {
867 int32_t length = (int32_t) strlen(string);
868 this->writeOpCode(opCode, 2 + (length + 4) / 4, out);
869 this->writeWord(word1, out);
870 this->writeString(string, out);
871 }
872
873 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
874 const char* string, std::ostream& out) {
875 int32_t length = (int32_t) strlen(string);
876 this->writeOpCode(opCode, 3 + (length + 4) / 4, out);
877 this->writeWord(word1, out);
878 this->writeWord(word2, out);
879 this->writeString(string, out);
880 }
881
882 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
883 std::ostream& out) {
884 this->writeOpCode(opCode, 3, out);
885 this->writeWord(word1, out);
886 this->writeWord(word2, out);
887 }
888
889 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
890 int32_t word3, std::ostream& out) {
891 this->writeOpCode(opCode, 4, out);
892 this->writeWord(word1, out);
893 this->writeWord(word2, out);
894 this->writeWord(word3, out);
895 }
896
897 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
898 int32_t word3, int32_t word4, std::ost ream& out) {
899 this->writeOpCode(opCode, 5, out);
900 this->writeWord(word1, out);
901 this->writeWord(word2, out);
902 this->writeWord(word3, out);
903 this->writeWord(word4, out);
904 }
905
906 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
907 int32_t word3, int32_t word4, int32_t word5,
908 std::ostream& out) {
909 this->writeOpCode(opCode, 6, out);
910 this->writeWord(word1, out);
911 this->writeWord(word2, out);
912 this->writeWord(word3, out);
913 this->writeWord(word4, out);
914 this->writeWord(word5, out);
915 }
916
917 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
918 int32_t word3, int32_t word4, int32_t word5,
919 int32_t word6, std::ostream& out) {
920 this->writeOpCode(opCode, 7, out);
921 this->writeWord(word1, out);
922 this->writeWord(word2, out);
923 this->writeWord(word3, out);
924 this->writeWord(word4, out);
925 this->writeWord(word5, out);
926 this->writeWord(word6, out);
927 }
928
929 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
930 int32_t word3, int32_t word4, int32_t word5,
931 int32_t word6, int32_t word7, std::ost ream& out) {
932 this->writeOpCode(opCode, 8, out);
933 this->writeWord(word1, out);
934 this->writeWord(word2, out);
935 this->writeWord(word3, out);
936 this->writeWord(word4, out);
937 this->writeWord(word5, out);
938 this->writeWord(word6, out);
939 this->writeWord(word7, out);
940 }
941
942 void SPIRVCodeGenerator::writeInstruction(SpvOp_ opCode, int32_t word1, int32_t word2,
943 int32_t word3, int32_t word4, int32_t word5,
944 int32_t word6, int32_t word7, int32_t word8,
945 std::ostream& out) {
946 this->writeOpCode(opCode, 9, out);
947 this->writeWord(word1, out);
948 this->writeWord(word2, out);
949 this->writeWord(word3, out);
950 this->writeWord(word4, out);
951 this->writeWord(word5, out);
952 this->writeWord(word6, out);
953 this->writeWord(word7, out);
954 this->writeWord(word8, out);
955 }
956
957 void SPIRVCodeGenerator::writeCapabilities(std::ostream& out) {
958 for (uint64_t i = 0, bit = 1; i <= kLast_Capability; i++, bit <<= 1) {
959 if (fCapabilities & bit) {
960 this->writeInstruction(SpvOpCapability, (SpvId) i, out);
961 }
962 }
963 }
964
965 SpvId SPIRVCodeGenerator::nextId() {
966 return fIdCount++;
967 }
968
969 void SPIRVCodeGenerator::writeStruct(const Type& type, SpvId resultId) {
970 this->writeInstruction(SpvOpName, resultId, type.name().c_str(), fNameBuffer );
971 // go ahead and write all of the field types, so we don't inadvertently writ e them while we're
972 // in the middle of writing the struct instruction
973 std::vector<SpvId> types;
974 for (const auto& f : type.fields()) {
975 types.push_back(this->getType(*f.fType));
976 }
977 this->writeOpCode(SpvOpTypeStruct, 2 + (int32_t) types.size(), fConstantBuff er);
978 this->writeWord(resultId, fConstantBuffer);
979 for (SpvId id : types) {
980 this->writeWord(id, fConstantBuffer);
981 }
982 size_t offset = 0;
983 for (int32_t i = 0; i < (int32_t) type.fields().size(); i++) {
984 size_t size = type.fields()[i].fType->size();
985 size_t alignment = type.fields()[i].fType->alignment();
986 size_t mod = offset % alignment;
987 if (mod != 0) {
988 offset += alignment - mod;
989 }
990 this->writeInstruction(SpvOpMemberName, resultId, i, type.fields()[i].fN ame.c_str(),
991 fNameBuffer);
992 this->writeLayout(type.fields()[i].fModifiers.fLayout, resultId, i);
993 if (type.fields()[i].fModifiers.fLayout.fBuiltin < 0) {
994 this->writeInstruction(SpvOpMemberDecorate, resultId, (SpvId) i, Spv DecorationOffset,
995 (SpvId) offset, fDecorationBuffer);
996 }
997 if (type.fields()[i].fType->kind() == Type::kMatrix_Kind) {
998 this->writeInstruction(SpvOpMemberDecorate, resultId, i, SpvDecorati onColMajor,
999 fDecorationBuffer);
1000 this->writeInstruction(SpvOpMemberDecorate, resultId, i, SpvDecorati onMatrixStride,
1001 (SpvId) type.fields()[i].fType->stride(), fDe corationBuffer);
1002 }
1003 offset += size;
1004 Type::Kind kind = type.fields()[i].fType->kind();
1005 if ((kind == Type::kArray_Kind || kind == Type::kStruct_Kind) && offset % alignment != 0) {
1006 offset += alignment - offset % alignment;
1007 }
1008 ASSERT(offset % alignment == 0);
1009 }
1010 }
1011
1012 SpvId SPIRVCodeGenerator::getType(const Type& type) {
1013 auto entry = fTypeMap.find(type.name());
dogben 2016/06/28 02:14:55 nit: const ref
1014 if (entry == fTypeMap.end()) {
1015 SpvId result = this->nextId();
1016 switch (type.kind()) {
1017 case Type::kScalar_Kind:
1018 if (type == *kBool_Type) {
1019 this->writeInstruction(SpvOpTypeBool, result, fConstantBuffe r);
1020 } else if (type == *kInt_Type) {
1021 this->writeInstruction(SpvOpTypeInt, result, 32, 1, fConstan tBuffer);
1022 } else if (type == *kUInt_Type) {
1023 this->writeInstruction(SpvOpTypeInt, result, 32, 0, fConstan tBuffer);
1024 } else if (type == *kFloat_Type) {
1025 this->writeInstruction(SpvOpTypeFloat, result, 32, fConstant Buffer);
1026 } else if (type == *kDouble_Type) {
1027 this->writeInstruction(SpvOpTypeFloat, result, 64, fConstant Buffer);
1028 } else {
1029 ASSERT(false);
1030 }
1031 break;
1032 case Type::kVector_Kind:
1033 this->writeInstruction(SpvOpTypeVector, result,
1034 this->getType(*type.componentType()),
1035 type.columns(), fConstantBuffer);
1036 break;
1037 case Type::kMatrix_Kind:
1038 this->writeInstruction(SpvOpTypeMatrix, result, this->getType(*i ndex_type(type)),
1039 type.columns(), fConstantBuffer);
1040 break;
1041 case Type::kStruct_Kind:
1042 this->writeStruct(type, result);
1043 break;
1044 case Type::kArray_Kind: {
1045 if (type.columns() > 0) {
1046 IntLiteral count(Position(), type.columns());
1047 this->writeInstruction(SpvOpTypeArray, result,
1048 this->getType(*type.componentType()),
1049 this->writeIntLiteral(count), fConsta ntBuffer);
1050 this->writeInstruction(SpvOpDecorate, result, SpvDecorationA rrayStride,
1051 (int32_t) type.stride(), fDecorationB uffer);
1052 } else {
1053 ABORT("runtime-sized arrays are not yet supported");
1054 this->writeInstruction(SpvOpTypeRuntimeArray, result,
1055 this->getType(*type.componentType()), fConstantBuffer);
1056 }
1057 break;
1058 }
1059 case Type::kSampler_Kind: {
1060 SpvId image = this->nextId();
1061 this->writeInstruction(SpvOpTypeImage, image, this->getType(*kFl oat_Type),
1062 type.dimensions(), type.isDepth(), type.i sArrayed(),
1063 type.isMultisampled(), type.isSampled(),
1064 SpvImageFormatUnknown, fConstantBuffer);
1065 this->writeInstruction(SpvOpTypeSampledImage, result, image, fCo nstantBuffer);
1066 break;
1067 }
1068 default:
1069 if (type == *kVoid_Type) {
1070 this->writeInstruction(SpvOpTypeVoid, result, fConstantBuffe r);
1071 } else {
1072 ABORT("invalid type: %s", type.description().c_str());
1073 }
1074 }
1075 fTypeMap[type.name()] = result;
1076 return result;
1077 }
1078 return entry->second;
1079 }
1080
1081 SpvId SPIRVCodeGenerator::getFunctionType(std::shared_ptr<FunctionDeclaration> f unction) {
1082 std::string key = function->fReturnType->description() + "(";
1083 std::string separator = "";
1084 for (size_t i = 0; i < function->fParameters.size(); i++) {
1085 key += separator;
1086 separator = ", ";
1087 key += function->fParameters[i]->fType->description();
1088 }
1089 key += ")";
1090 auto entry = fTypeMap.find(key);
dogben 2016/06/28 02:14:55 nit: const ref
1091 if (entry == fTypeMap.end()) {
1092 SpvId result = this->nextId();
1093 int32_t length = 3 + (int32_t) function->fParameters.size();
1094 SpvId returnType = this->getType(*function->fReturnType);
1095 std::vector<SpvId> parameterTypes;
1096 for (size_t i = 0; i < function->fParameters.size(); i++) {
1097 // glslang seems to treat all function arguments as pointers whether they need to be or
1098 // not. I was initially puzzled by this until I ran bizarre failure s with certain
1099 // patterns of function calls and control constructs, as exemplified by this minimal
1100 // failure case:
1101 //
1102 // void sphere(float x) {
1103 // }
1104 //
1105 // void map() {
1106 // sphere(1.0);
1107 // }
1108 //
1109 // void main() {
1110 // for (int i = 0; i < 1; i++) {
1111 // map();
1112 // }
1113 // }
1114 //
1115 // As of this writing, compiling this in the "obvious" way (with sph ere taking a float)
1116 // crashes. Making it take a float* and storing the argument in a te mporary variable,
1117 // as glslang does, fixes it. It's entirely possible I simply missed whichever part of
1118 // the spec makes this make sense.
1119 // if (is_out(function->fParameters[i])) {
1120 parameterTypes.push_back(this->getPointerType(function->fParamet ers[i]->fType,
1121 SpvStorageClassFun ction));
1122 // } else {
1123 // parameterTypes.push_back(this->getType(*function->fParameters[ i]->fType));
1124 // }
1125 }
1126 this->writeOpCode(SpvOpTypeFunction, length, fConstantBuffer);
1127 this->writeWord(result, fConstantBuffer);
1128 this->writeWord(returnType, fConstantBuffer);
1129 for (SpvId id : parameterTypes) {
1130 this->writeWord(id, fConstantBuffer);
1131 }
1132 fTypeMap[key] = result;
1133 return result;
1134 }
1135 return entry->second;
1136 }
1137
1138 SpvId SPIRVCodeGenerator::getPointerType(std::shared_ptr<Type> type,
1139 SpvStorageClass_ storageClass) {
1140 std::string key = type->description() + "*" + to_string(storageClass);
1141 auto entry = fTypeMap.find(key);
1142 if (entry == fTypeMap.end()) {
1143 SpvId result = this->nextId();
1144 this->writeInstruction(SpvOpTypePointer, result, storageClass,
1145 this->getType(*type), fConstantBuffer);
1146 fTypeMap[key] = result;
1147 return result;
1148 }
1149 return entry->second;
1150 }
1151
1152 SpvId SPIRVCodeGenerator::writeExpression(Expression& expr, std::ostream& out) {
1153 switch (expr.fKind) {
1154 case Expression::kBinary_Kind:
1155 return this->writeBinaryExpression((BinaryExpression&) expr, out);
1156 case Expression::kBoolLiteral_Kind:
1157 return this->writeBoolLiteral((BoolLiteral&) expr);
1158 case Expression::kConstructor_Kind:
1159 return this->writeConstructor((Constructor&) expr, out);
1160 case Expression::kIntLiteral_Kind:
1161 return this->writeIntLiteral((IntLiteral&) expr);
1162 case Expression::kFieldAccess_Kind:
1163 return this->writeFieldAccess(((FieldAccess&) expr), out);
1164 case Expression::kFloatLiteral_Kind:
1165 return this->writeFloatLiteral(((FloatLiteral&) expr));
1166 case Expression::kFunctionCall_Kind:
1167 return this->writeFunctionCall((FunctionCall&) expr, out);
1168 case Expression::kPrefix_Kind:
1169 return this->writePrefixExpression((PrefixExpression&) expr, out);
1170 case Expression::kPostfix_Kind:
1171 return this->writePostfixExpression((PostfixExpression&) expr, out);
1172 case Expression::kSwizzle_Kind:
1173 return this->writeSwizzle((Swizzle&) expr, out);
1174 case Expression::kVariableReference_Kind:
1175 return this->writeVariableReference((VariableReference&) expr, out);
1176 case Expression::kTernary_Kind:
1177 return this->writeTernaryExpression((TernaryExpression&) expr, out);
1178 case Expression::kIndex_Kind:
1179 return this->writeIndexExpression((IndexExpression&) expr, out);
1180 default:
1181 ABORT("unsupported expression: %s", expr.description().c_str());
1182 }
1183 return -1;
1184 }
1185
1186 SpvId SPIRVCodeGenerator::writeIntrinsicCall(FunctionCall& c, std::ostream& out) {
1187 auto intrinsic = fIntrinsicMap.find(c.fFunction->fName);
1188 ASSERT(intrinsic != fIntrinsicMap.end());
1189 std::shared_ptr<Type> type = c.fArguments[0]->fType;
1190 int32_t intrinsicId;
1191 if (std::get<0>(intrinsic->second) == kSpecial_IntrinsicKind || is_float(*ty pe)) {
1192 intrinsicId = std::get<1>(intrinsic->second);
1193 } else if (is_signed(*type)) {
1194 intrinsicId = std::get<2>(intrinsic->second);
1195 } else if (is_unsigned(*type)) {
1196 intrinsicId = std::get<3>(intrinsic->second);
1197 } else if (is_bool(*type)) {
1198 intrinsicId = std::get<4>(intrinsic->second);
1199 } else {
1200 ABORT("invalid call %s, cannot operate on '%s'", c.description().c_str() ,
1201 type->description().c_str());
1202 }
1203 switch (std::get<0>(intrinsic->second)) {
1204 case kGLSL_STD_450_IntrinsicKind: {
1205 SpvId result = this->nextId();
1206 std::vector<SpvId> arguments;
1207 for (size_t i = 0; i < c.fArguments.size(); i++) {
1208 arguments.push_back(this->writeExpression(*c.fArguments[i], out) );
1209 }
1210 this->writeOpCode(SpvOpExtInst, 5 + (int32_t) arguments.size(), out) ;
1211 this->writeWord(this->getType(*c.fType), out);
1212 this->writeWord(result, out);
1213 this->writeWord(fGLSLExtendedInstructions, out);
1214 this->writeWord(intrinsicId, out);
1215 for (SpvId id : arguments) {
1216 this->writeWord(id, out);
1217 }
1218 return result;
1219 }
1220 case kSPIRV_IntrinsicKind: {
1221 SpvId result = this->nextId();
1222 std::vector<SpvId> arguments;
1223 for (size_t i = 0; i < c.fArguments.size(); i++) {
1224 arguments.push_back(this->writeExpression(*c.fArguments[i], out) );
1225 }
1226 this->writeOpCode((SpvOp_) intrinsicId, 3 + (int32_t) arguments.size (), out);
1227 this->writeWord(this->getType(*c.fType), out);
1228 this->writeWord(result, out);
1229 for (SpvId id : arguments) {
1230 this->writeWord(id, out);
1231 }
1232 return result;
1233 }
1234 case kSpecial_IntrinsicKind:
1235 return this->writeSpecialIntrinsic(c, (SpecialIntrinsic) intrinsicId , out);
1236 default:
1237 ABORT("unsupported intrinsic kind");
1238 }
1239 }
1240
1241 SpvId SPIRVCodeGenerator::writeSpecialIntrinsic(FunctionCall& c, SpecialIntrinsi c kind,
1242 std::ostream& out) {
1243 SpvId result = this->nextId();
1244 switch (kind) {
1245 case kAtan_SpecialIntrinsic: {
1246 std::vector<SpvId> arguments;
1247 for (size_t i = 0; i < c.fArguments.size(); i++) {
1248 arguments.push_back(this->writeExpression(*c.fArguments[i], out) );
1249 }
1250 this->writeOpCode(SpvOpExtInst, 5 + (int32_t) arguments.size(), out) ;
1251 this->writeWord(this->getType(*c.fType), out);
1252 this->writeWord(result, out);
1253 this->writeWord(fGLSLExtendedInstructions, out);
1254 this->writeWord(arguments.size() == 2 ? GLSLstd450Atan2 : GLSLstd450 Atan, out);
1255 for (SpvId id : arguments) {
1256 this->writeWord(id, out);
1257 }
1258 return result;
1259 }
1260 case kTexture_SpecialIntrinsic: {
1261 SpvId type = this->getType(*c.fType);
1262 SpvId sampler = this->writeExpression(*c.fArguments[0], out);
1263 SpvId uv = this->writeExpression(*c.fArguments[1], out);
1264 if (c.fArguments.size() == 3) {
1265 this->writeInstruction(SpvOpImageSampleImplicitLod, type, result , sampler, uv,
1266 SpvImageOperandsBiasMask,
1267 this->writeExpression(*c.fArguments[2], o ut),
1268 out);
1269 } else {
1270 ASSERT(c.fArguments.size() == 2);
1271 this->writeInstruction(SpvOpImageSampleImplicitLod, type, result , sampler, uv, out);
1272 }
1273 break;
1274 }
1275 case kTextureProj_SpecialIntrinsic: {
1276 SpvId type = this->getType(*c.fType);
1277 SpvId sampler = this->writeExpression(*c.fArguments[0], out);
1278 SpvId uv = this->writeExpression(*c.fArguments[1], out);
1279 if (c.fArguments.size() == 3) {
1280 this->writeInstruction(SpvOpImageSampleProjImplicitLod, type, re sult, sampler, uv,
1281 SpvImageOperandsBiasMask,
1282 this->writeExpression(*c.fArguments[2], o ut),
1283 out);
1284 } else {
1285 ASSERT(c.fArguments.size() == 2);
1286 this->writeInstruction(SpvOpImageSampleProjImplicitLod, type, re sult, sampler, uv,
1287 out);
1288 }
1289 break;
1290 }
1291 case kTexture2D_SpecialIntrinsic: {
1292 SpvId img = this->writeExpression(*c.fArguments[0], out);
1293 SpvId coords = this->writeExpression(*c.fArguments[1], out);
1294 this->writeInstruction(SpvOpImageSampleImplicitLod,
1295 this->getType(*c.fType),
1296 result,
1297 img,
1298 coords,
1299 out);
1300 break;
1301 }
1302 }
1303 return result;
1304 }
1305
1306 SpvId SPIRVCodeGenerator::writeFunctionCall(FunctionCall& c, std::ostream& out) {
1307 const auto& entry = fFunctionMap.find(c.fFunction);
1308 if (entry == fFunctionMap.end()) {
1309 return this->writeIntrinsicCall(c, out);
1310 }
1311 std::vector<SpvId> arguments;
1312 for (size_t i = 0; i < c.fArguments.size(); i++) {
1313 // see getFunctionType for an explanation of why we're always using out parameters
1314 if (is_out(c.fFunction->fParameters[i])) {
1315 arguments.push_back(this->getLValue(*c.fArguments[i], out));
1316 } else {
1317 SpvId expr = this->writeExpression(*c.fArguments[i], out);
1318 SpvId tmpVar = this->nextId();
1319 this->writeInstruction(SpvOpVariable,
1320 this->getPointerType(c.fArguments[i]->fType,
1321 SpvStorageClassFunction) ,
1322 tmpVar,
1323 SpvStorageClassFunction,
1324 out);
1325 this->writeInstruction(SpvOpStore, tmpVar, expr, out);
1326 arguments.push_back(tmpVar);
1327 }
1328 }
1329 SpvId result = this->nextId();
1330 this->writeOpCode(SpvOpFunctionCall, 4 + (int32_t) c.fArguments.size(), out) ;
1331 this->writeWord(this->getType(*c.fType), out);
1332 this->writeWord(result, out);
1333 this->writeWord(entry->second, out);
1334 for (SpvId id : arguments) {
1335 this->writeWord(id, out);
1336 }
1337 return result;
1338 }
1339
1340 SpvId SPIRVCodeGenerator::writeConstantVector(Constructor& c) {
1341 ASSERT(c.fType->kind() == Type::kVector_Kind && c.isConstant());
1342 SpvId result = this->nextId();
1343 std::vector<SpvId> arguments;
1344 for (size_t i = 0; i < c.fArguments.size(); i++) {
1345 arguments.push_back(this->writeExpression(*c.fArguments[i], fConstantBuf fer));
1346 }
1347 SpvId type = this->getType(*c.fType);
1348 if (c.fArguments.size() == 1) {
1349 // with a single argument, a vector will have all of its entries equal t o the argument
1350 this->writeOpCode(SpvOpConstantComposite, 3 + c.fType->columns(), fConst antBuffer);
1351 this->writeWord(type, fConstantBuffer);
1352 this->writeWord(result, fConstantBuffer);
1353 for (int i = 0; i < c.fType->columns(); i++) {
1354 this->writeWord(arguments[0], fConstantBuffer);
1355 }
1356 } else {
1357 this->writeOpCode(SpvOpConstantComposite, 3 + (int32_t) c.fArguments.siz e(),
1358 fConstantBuffer);
1359 this->writeWord(type, fConstantBuffer);
1360 this->writeWord(result, fConstantBuffer);
1361 for (SpvId id : arguments) {
1362 this->writeWord(id, fConstantBuffer);
1363 }
1364 }
1365 return result;
1366 }
1367
1368 SpvId SPIRVCodeGenerator::writeFloatConstructor(Constructor& c, std::ostream& ou t) {
1369 ASSERT(c.fType == kFloat_Type);
1370 ASSERT(c.fArguments.size() == 1);
1371 ASSERT(c.fArguments[0]->fType->isNumber());
1372 SpvId result = this->nextId();
1373 SpvId parameter = this->writeExpression(*c.fArguments[0], out);
1374 if (c.fArguments[0]->fType == kInt_Type) {
1375 this->writeInstruction(SpvOpConvertSToF, this->getType(*c.fType), result , parameter,
1376 out);
1377 } else if (c.fArguments[0]->fType == kUInt_Type) {
1378 this->writeInstruction(SpvOpConvertUToF, this->getType(*c.fType), result , parameter,
1379 out);
1380 } else if (c.fArguments[0]->fType == kFloat_Type) {
1381 return parameter;
1382 }
1383 return result;
1384 }
1385
1386 SpvId SPIRVCodeGenerator::writeIntConstructor(Constructor& c, std::ostream& out) {
1387 ASSERT(c.fType == kInt_Type);
1388 ASSERT(c.fArguments.size() == 1);
1389 ASSERT(c.fArguments[0]->fType->isNumber());
1390 SpvId result = this->nextId();
1391 SpvId parameter = this->writeExpression(*c.fArguments[0], out);
1392 if (c.fArguments[0]->fType == kFloat_Type) {
1393 this->writeInstruction(SpvOpConvertFToS, this->getType(*c.fType), result , parameter,
1394 out);
1395 } else if (c.fArguments[0]->fType == kUInt_Type) {
1396 this->writeInstruction(SpvOpSatConvertUToS, this->getType(*c.fType), res ult, parameter,
1397 out);
1398 } else if (c.fArguments[0]->fType == kInt_Type) {
1399 return parameter;
1400 }
1401 return result;
1402 }
1403
1404 SpvId SPIRVCodeGenerator::writeMatrixConstructor(Constructor& c, std::ostream& o ut) {
1405 ASSERT(c.fType->kind() == Type::kMatrix_Kind);
1406 // go ahead and write the arguments so we don't try to write new instruction s in the middle of
1407 // an instruction
1408 std::vector<SpvId> arguments;
1409 for (size_t i = 0; i < c.fArguments.size(); i++) {
1410 arguments.push_back(this->writeExpression(*c.fArguments[i], out));
1411 }
1412 SpvId result = this->nextId();
1413 int rows = c.fType->rows();
1414 int columns = c.fType->columns();
1415 // FIXME this won't work to create a matrix from another matrix
1416 if (arguments.size() == 1) {
1417 // with a single argument, a matrix will have all of its diagonal entrie s equal to the
1418 // argument and its other values equal to zero
1419 // FIXME this won't work for int matrices
1420 FloatLiteral zero(Position(), 0);
1421 SpvId zeroId = this->writeFloatLiteral(zero);
1422 std::vector<SpvId> columnIds;
1423 for (int column = 0; column < columns; column++) {
1424 this->writeOpCode(SpvOpCompositeConstruct, 3 + c.fType->rows(),
1425 out);
1426 this->writeWord(this->getType(*c.fType->componentType()->toCompound( rows, 1)), out);
1427 SpvId columnId = this->nextId();
1428 this->writeWord(columnId, out);
1429 columnIds.push_back(columnId);
1430 for (int row = 0; row < c.fType->columns(); row++) {
1431 this->writeWord(row == column ? arguments[0] : zeroId, out);
1432 }
1433 }
1434 this->writeOpCode(SpvOpCompositeConstruct, 3 + columns,
1435 out);
1436 this->writeWord(this->getType(*c.fType), out);
1437 this->writeWord(result, out);
1438 for (SpvId id : columnIds) {
1439 this->writeWord(id, out);
1440 }
1441 } else {
1442 std::vector<SpvId> columnIds;
1443 int currentCount = 0;
1444 for (size_t i = 0; i < arguments.size(); i++) {
1445 if (c.fArguments[i]->fType->kind() == Type::kVector_Kind) {
1446 ASSERT(currentCount == 0);
1447 columnIds.push_back(arguments[i]);
1448 currentCount = 0;
1449 } else {
1450 ASSERT(c.fArguments[i]->fType->kind() == Type::kScalar_Kind);
1451 if (currentCount == 0) {
1452 this->writeOpCode(SpvOpCompositeConstruct, 3 + c.fType->rows (), out);
1453 this->writeWord(this->getType(*c.fType->componentType()->toC ompound(rows, 1)),
1454 out);
1455 SpvId id = this->nextId();
1456 this->writeWord(id, out);
1457 columnIds.push_back(id);
1458 }
1459 this->writeWord(arguments[i], out);
1460 currentCount = (currentCount + 1) % rows;
1461 }
1462 }
1463 ASSERT(columnIds.size() == (size_t) columns);
1464 this->writeOpCode(SpvOpCompositeConstruct, 3 + columns, out);
1465 this->writeWord(this->getType(*c.fType), out);
1466 this->writeWord(result, out);
1467 for (SpvId id : columnIds) {
1468 this->writeWord(id, out);
1469 }
1470 }
1471 return result;
1472 }
1473
1474 SpvId SPIRVCodeGenerator::writeVectorConstructor(Constructor& c, std::ostream& o ut) {
1475 ASSERT(c.fType->kind() == Type::kVector_Kind);
1476 if (c.isConstant()) {
1477 return this->writeConstantVector(c);
1478 }
1479 // go ahead and write the arguments so we don't try to write new instruction s in the middle of
1480 // an instruction
1481 std::vector<SpvId> arguments;
1482 for (size_t i = 0; i < c.fArguments.size(); i++) {
1483 arguments.push_back(this->writeExpression(*c.fArguments[i], out));
1484 }
1485 SpvId result = this->nextId();
1486 if (arguments.size() == 1 && c.fArguments[0]->fType->kind() == Type::kScalar _Kind) {
1487 this->writeOpCode(SpvOpCompositeConstruct, 3 + c.fType->columns(), out);
1488 this->writeWord(this->getType(*c.fType), out);
1489 this->writeWord(result, out);
1490 for (int i = 0; i < c.fType->columns(); i++) {
1491 this->writeWord(arguments[0], out);
1492 }
1493 } else {
1494 this->writeOpCode(SpvOpCompositeConstruct, 3 + (int32_t) c.fArguments.si ze(), out);
1495 this->writeWord(this->getType(*c.fType), out);
1496 this->writeWord(result, out);
1497 for (SpvId id : arguments) {
1498 this->writeWord(id, out);
1499 }
1500 }
1501 return result;
1502 }
1503
1504 SpvId SPIRVCodeGenerator::writeConstructor(Constructor& c, std::ostream& out) {
1505 if (c.fType == kFloat_Type) {
1506 return this->writeFloatConstructor(c, out);
1507 } else if (c.fType == kInt_Type) {
1508 return this->writeIntConstructor(c, out);
1509 }
1510 switch (c.fType->kind()) {
1511 case Type::kVector_Kind:
1512 return this->writeVectorConstructor(c, out);
1513 case Type::kMatrix_Kind:
1514 return this->writeMatrixConstructor(c, out);
1515 default:
1516 ABORT("unsupported constructor: %s", c.description().c_str());
1517 }
1518 }
1519
1520 SpvStorageClass_ get_storage_class(const Modifiers& modifiers) {
1521 if (modifiers.fFlags & Modifiers::kIn_Flag) {
1522 return SpvStorageClassInput;
1523 } else if (modifiers.fFlags & Modifiers::kOut_Flag) {
1524 return SpvStorageClassOutput;
1525 } else if (modifiers.fFlags & Modifiers::kUniform_Flag) {
1526 return SpvStorageClassUniform;
1527 } else {
1528 return SpvStorageClassFunction;
1529 }
1530 }
1531
1532 SpvStorageClass_ get_storage_class(Expression& expr) {
1533 switch (expr.fKind) {
1534 case Expression::kVariableReference_Kind:
1535 return get_storage_class(((VariableReference&) expr).fVariable->fMod ifiers);
1536 case Expression::kFieldAccess_Kind:
1537 return get_storage_class(*((FieldAccess&) expr).fBase);
1538 case Expression::kIndex_Kind:
1539 return get_storage_class(*((IndexExpression&) expr).fBase);
1540 default:
1541 return SpvStorageClassFunction;
1542 }
1543 }
1544
1545 // TODO: unify this with getAccessChain?
1546 SpvId SPIRVCodeGenerator::getLValue(Expression& value, std::ostream& out) {
1547 switch (value.fKind) {
1548 case Expression::kVariableReference_Kind: {
1549 std::shared_ptr<Variable> var = ((VariableReference&) value).fVariab le;
1550 auto entry = fVariableMap.find(var);
1551 ASSERT(entry != fVariableMap.end());
1552 return entry->second;
1553 }
1554 case Expression::kIndex_Kind: {
1555 IndexExpression& index = (IndexExpression&) value;
1556 SpvId base = this->getLValue(*index.fBase, out);
1557 SpvId result = this->nextId();
1558 this->writeInstruction(SpvOpAccessChain,
1559 this->getPointerType(index.fType,
1560 get_storage_class(*index .fBase)),
1561 result,
1562 base,
1563 this->writeExpression(*index.fIndex, out),
1564 out);
1565 return result;
1566 }
1567 case Expression::kFieldAccess_Kind: {
1568 FieldAccess& f = (FieldAccess&) value;
1569 SpvId base = this->getLValue(*f.fBase, out);
1570 IntLiteral index(Position(), f.fFieldIndex);
1571 SpvId result = this->nextId();
1572 this->writeInstruction(SpvOpAccessChain,
1573 this->getPointerType(f.fType,
1574 get_storage_class(*f.fBa se)),
1575 result,
1576 base,
1577 this->writeIntLiteral(index),
1578 out);
1579 return result;
1580 }
1581 default:
1582 SpvId result = this->nextId();
1583 SpvId type = this->getPointerType(value.fType, SpvStorageClassFuncti on);
1584 this->writeInstruction(SpvOpVariable, type, result, SpvStorageClassF unction, out);
1585 this->writeInstruction(SpvOpStore, result, this->writeExpression(val ue, out), out);
1586 return result;
1587 }
1588 }
1589
1590 void SPIRVCodeGenerator::storeToLValue(Expression& lvalue, SpvId value, std::ost ream& out) {
1591 switch (lvalue.fKind) {
1592 case Expression::kVariableReference_Kind: // fall through
1593 case Expression::kIndex_Kind: // fall through
1594 case Expression::kFieldAccess_Kind: {
1595 SpvId id = this->getLValue(lvalue, out);
1596 this->writeInstruction(SpvOpStore, id, value, out);
1597 break;
1598 }
1599 case Expression::kSwizzle_Kind: {
1600 Swizzle& swizzle = (Swizzle&) lvalue;
1601 size_t count = swizzle.fComponents.size();
1602 SpvId base = this->getLValue(*swizzle.fBase, out);
1603 if (count == 1) {
1604 IntLiteral index(Position(), swizzle.fComponents[0]);
1605 SpvId target = this->nextId();
1606 this->writeInstruction(SpvOpAccessChain,
1607 this->getPointerType(swizzle.fType,
1608 get_storage_class(*s wizzle.fBase)),
1609 target,
1610 base,
1611 this->writeIntLiteral(index),
1612 out);
1613 this->writeInstruction(SpvOpStore, target, value, out);
1614 } else {
1615 // use OpVectorShuffle to mix and match the vector components. W e effectively create
1616 // a virtual vector out of the concatenation of the left and rig ht vectors, and then
1617 // select components from this virtual vector to make the result vector. For
1618 // instance, given:
1619 // vec3 L = ...;
1620 // vec3 R = ...;
1621 // L.xz = R.xy;
1622 // we end up with the virtual vector (L.x, L.y, L.z, R.x, R.y, R .z). Then we want
1623 // our result vector to look like (R.x, L.y, R.y), so we need to select indices
1624 // (4, 1, 5).
dogben 2016/06/28 02:14:55 3, 1, 4
1625 SpvId shuffle = this->nextId();
1626 std::shared_ptr<Type> baseType = swizzle.fBase->fType;
1627 SpvId lhs = this->writeExpression(*swizzle.fBase, out);
1628 this->writeOpCode(SpvOpVectorShuffle, 5 + baseType->columns(), o ut);
1629 this->writeWord(this->getType(*baseType), out);
1630 this->writeWord(shuffle, out);
1631 this->writeWord(lhs, out);
1632 this->writeWord(value, out);
1633 for (int i = 0; i < baseType->columns(); i++) {
1634 // current offset into the virtual vector, defaults to pulli ng the unmodified
1635 // value from the left side
1636 int offset = i;
1637 // check to see if we are writing this component
1638 for (size_t j = 0; j < swizzle.fComponents.size(); j++) {
1639 if (swizzle.fComponents[j] == i) {
1640 // we're writing to this component, so adjust the of fset to pull from
1641 // the correct component of the right side instead o f preserving the
1642 // value from the left
1643 offset = (int) (j + baseType->columns());
1644 break;
1645 }
1646 }
1647 this->writeWord(offset, out);
1648 }
1649 this->writeInstruction(SpvOpStore, base, shuffle, out);
1650 }
1651 break;
1652 }
1653 default:
1654 ABORT("cannot use %s as an lvalue", lvalue.description().c_str());
1655 }
1656 }
1657
1658 SpvId SPIRVCodeGenerator::writeVariableReference(VariableReference& ref, std::os tream& out) {
1659 auto entry = fVariableMap.find(ref.fVariable);
1660 ASSERT(entry != fVariableMap.end());
1661 SpvId var = entry->second;
1662 SpvId result = this->nextId();
1663 this->writeInstruction(SpvOpLoad, this->getType(*ref.fVariable->fType), resu lt, var, out);
1664 return result;
1665 }
1666
1667 std::vector<SpvId> SPIRVCodeGenerator::getAccessChain(Expression& expr, std::ost ream& out) {
1668 std::vector<SpvId> chain;
1669 switch (expr.fKind) {
1670 case Expression::kIndex_Kind: {
1671 IndexExpression& indexExpr = (IndexExpression&) expr;
1672 chain = this->getAccessChain(*indexExpr.fBase, out);
1673 chain.push_back(this->writeExpression(*indexExpr.fIndex, out));
1674 break;
1675 }
1676 case Expression::kFieldAccess_Kind: {
1677 FieldAccess& fieldExpr = (FieldAccess&) expr;
1678 chain = this->getAccessChain(*fieldExpr.fBase, out);
1679 IntLiteral index(Position(), fieldExpr.fFieldIndex);
1680 chain.push_back(this->writeIntLiteral(index));
1681 break;
1682 }
1683 default:
1684 chain.push_back(this->getLValue(expr, out));
1685 }
1686 return chain;
1687 }
1688
1689 SpvId SPIRVCodeGenerator::writeIndexExpression(IndexExpression& expr, std::ostre am& out) {
1690 std::vector<SpvId> chain = this->getAccessChain(expr, out);
1691 SpvId member = this->nextId();
1692 this->writeOpCode(SpvOpAccessChain, (SpvId) (3 + chain.size()), out);
1693 this->writeWord(this->getPointerType(expr.fType, get_storage_class(*expr.fBa se)), out);
1694 this->writeWord(member, out);
1695 for (SpvId idx : chain) {
1696 this->writeWord(idx, out);
1697 }
1698 SpvId result = this->nextId();
1699 this->writeInstruction(SpvOpLoad, this->getType(*expr.fType), result, member , out);
1700 return result;
1701 }
1702
1703 SpvId SPIRVCodeGenerator::writeFieldAccess(FieldAccess& f, std::ostream& out) {
1704 std::vector<SpvId> chain = this->getAccessChain(f, out);
1705 SpvId member = this->nextId();
1706 this->writeOpCode(SpvOpAccessChain, (SpvId) (3 + chain.size()), out);
1707 this->writeWord(this->getPointerType(f.fType, get_storage_class(*f.fBase)), out);
1708 this->writeWord(member, out);
1709 for (SpvId idx : chain) {
1710 this->writeWord(idx, out);
1711 }
1712 SpvId result = this->nextId();
1713 this->writeInstruction(SpvOpLoad, this->getType(*f.fType), result, member, o ut);
1714 return result;
1715 }
1716
1717 SpvId SPIRVCodeGenerator::writeSwizzle(Swizzle& swizzle, std::ostream& out) {
1718 SpvId base = this->writeExpression(*swizzle.fBase, out);
1719 SpvId result = this->nextId();
1720 size_t count = swizzle.fComponents.size();
1721 if (count == 1) {
1722 this->writeInstruction(SpvOpCompositeExtract, this->getType(*swizzle.fTy pe), result, base,
1723 swizzle.fComponents[0], out);
1724 } else {
1725 this->writeOpCode(SpvOpVectorShuffle, 5 + (int32_t) count, out);
1726 this->writeWord(this->getType(*swizzle.fType), out);
1727 this->writeWord(result, out);
1728 this->writeWord(base, out);
1729 this->writeWord(base, out);
1730 for (int component : swizzle.fComponents) {
1731 this->writeWord(component, out);
1732 }
1733 }
1734 return result;
1735 }
1736
1737 SpvId SPIRVCodeGenerator::writeBinaryOperation(const Type& resultType,
1738 const Type& operandType, SpvId lh s,
1739 SpvId rhs, SpvOp_ ifFloat, SpvOp_ ifInt,
1740 SpvOp_ ifUInt, SpvOp_ ifBool, std ::ostream& out) {
1741 SpvId result = this->nextId();
1742 if (is_float(operandType)) {
1743 this->writeInstruction(ifFloat, this->getType(resultType), result, lhs, rhs, out);
1744 } else if (is_signed(operandType)) {
1745 this->writeInstruction(ifInt, this->getType(resultType), result, lhs, rh s, out);
1746 } else if (is_unsigned(operandType)) {
1747 this->writeInstruction(ifUInt, this->getType(resultType), result, lhs, r hs, out);
1748 } else if (operandType == *kBool_Type) {
1749 this->writeInstruction(ifBool, this->getType(resultType), result, lhs, r hs, out);
1750 } else {
1751 ABORT("invalid operandType: %s", operandType.description().c_str());
1752 }
1753 return result;
1754 }
1755
1756 SpvId SPIRVCodeGenerator::writeBinaryExpression(BinaryExpression& b, std::ostrea m& out) {
1757 // handle cases where we don't necessarily evaluate both LHS and RHS
1758 switch (b.fOperator) {
1759 case Token::EQ: {
1760 SpvId rhs = this->writeExpression(*b.fRight, out);
1761 this->storeToLValue(*b.fLeft, rhs, out);
1762 return rhs;
1763 }
1764 case Token::LOGICALAND:
1765 return this->writeLogicalAnd(b, out);
1766 case Token::LOGICALOR:
1767 return this->writeLogicalOr(b, out);
1768 default:
1769 break;
1770 }
1771
1772 // "normal" operators
1773 const Type& resultType = *b.fType;
1774 SpvId lhs = this->writeExpression(*b.fLeft, out);
1775 SpvId rhs = this->writeExpression(*b.fRight, out);
1776 // component type we are operating on: float, int, uint
1777 const Type* operandType;
1778 // IR allows mismatched types in expressions (e.g. vec2 * float), but they n eed special handling
1779 // in SPIR-V
1780 if (b.fLeft->fType != b.fRight->fType) {
1781 if (b.fLeft->fType->kind() == Type::kVector_Kind &&
1782 b.fRight->fType->isNumber()) {
1783 // promote number to vector
1784 SpvId vec = this->nextId();
1785 this->writeOpCode(SpvOpCompositeConstruct, 3 + b.fType->columns(), o ut);
1786 this->writeWord(this->getType(resultType), out);
1787 this->writeWord(vec, out);
1788 for (int i = 0; i < resultType.columns(); i++) {
1789 this->writeWord(rhs, out);
1790 }
1791 rhs = vec;
1792 operandType = b.fRight->fType.get();
1793 } else if (b.fRight->fType->kind() == Type::kVector_Kind &&
1794 b.fLeft->fType->isNumber()) {
1795 // promote number to vector
1796 SpvId vec = this->nextId();
1797 this->writeOpCode(SpvOpCompositeConstruct, 3 + b.fType->columns(), o ut);
1798 this->writeWord(this->getType(resultType), out);
1799 this->writeWord(vec, out);
1800 for (int i = 0; i < resultType.columns(); i++) {
1801 this->writeWord(lhs, out);
1802 }
1803 lhs = vec;
1804 operandType = b.fLeft->fType.get();
1805 } else if (b.fLeft->fType->kind() == Type::kMatrix_Kind) {
1806 SpvOp_ op;
1807 if (b.fRight->fType->kind() == Type::kMatrix_Kind) {
1808 op = SpvOpMatrixTimesMatrix;
1809 } else if (b.fRight->fType->kind() == Type::kVector_Kind) {
1810 op = SpvOpMatrixTimesVector;
1811 } else {
1812 ASSERT(b.fRight->fType->kind() == Type::kScalar_Kind);
1813 op = SpvOpMatrixTimesScalar;
1814 }
1815 SpvId result = this->nextId();
1816 this->writeInstruction(op, this->getType(*b.fType), result, lhs, rhs , out);
1817 if (b.fOperator == Token::STAREQ) {
1818 this->storeToLValue(*b.fLeft, result, out);
1819 } else {
1820 ASSERT(b.fOperator == Token::STAR);
1821 }
1822 return result;
1823 } else if (b.fRight->fType->kind() == Type::kMatrix_Kind) {
1824 SpvId result = this->nextId();
1825 if (b.fLeft->fType->kind() == Type::kVector_Kind) {
1826 this->writeInstruction(SpvOpVectorTimesMatrix, this->getType(*b. fType), result, lhs,
1827 rhs, out);
1828 } else {
1829 ASSERT(b.fLeft->fType->kind() == Type::kScalar_Kind);
1830 this->writeInstruction(SpvOpMatrixTimesScalar, this->getType(*b. fType), result, rhs,
1831 lhs, out);
1832 }
1833 if (b.fOperator == Token::STAREQ) {
1834 this->storeToLValue(*b.fLeft, result, out);
1835 } else {
1836 ASSERT(b.fOperator == Token::STAR);
1837 }
1838 return result;
1839 } else {
1840 ABORT("unsupported binary expression: %s", b.description().c_str());
1841 }
1842 } else {
1843 operandType = b.fLeft->fType.get();
1844 ASSERT(*operandType == *b.fRight->fType.get());
dogben 2016/06/28 02:14:55 nit: .get() is superfluous
1845 }
1846 switch (b.fOperator) {
1847 case Token::EQEQ:
1848 ASSERT(resultType == *kBool_Type);
1849 return this->writeBinaryOperation(resultType, *operandType, lhs, rhs , SpvOpFOrdEqual,
1850 SpvOpIEqual, SpvOpIEqual, SpvOpLog icalEqual, out);
1851 case Token::NEQ:
1852 ASSERT(resultType == *kBool_Type);
1853 return this->writeBinaryOperation(resultType, *operandType, lhs, rhs , SpvOpFOrdNotEqual,
1854 SpvOpINotEqual, SpvOpINotEqual, Sp vOpLogicalNotEqual,
1855 out);
1856 case Token::GT:
1857 ASSERT(resultType == *kBool_Type);
1858 return this->writeBinaryOperation(resultType, *operandType, lhs, rhs ,
1859 SpvOpFOrdGreaterThan, SpvOpSGreate rThan,
1860 SpvOpUGreaterThan, SpvOpUndef, out );
1861 case Token::LT:
1862 ASSERT(resultType == *kBool_Type);
1863 return this->writeBinaryOperation(resultType, *operandType, lhs, rhs , SpvOpFOrdLessThan,
1864 SpvOpSLessThan, SpvOpULessThan, Sp vOpUndef, out);
1865 case Token::GTEQ:
1866 ASSERT(resultType == *kBool_Type);
1867 return this->writeBinaryOperation(resultType, *operandType, lhs, rhs ,
1868 SpvOpFOrdGreaterThanEqual, SpvOpSG reaterThanEqual,
1869 SpvOpUGreaterThanEqual, SpvOpUndef , out);
1870 case Token::LTEQ:
1871 ASSERT(resultType == *kBool_Type);
1872 return this->writeBinaryOperation(resultType, *operandType, lhs, rhs ,
1873 SpvOpFOrdLessThanEqual, SpvOpSLess ThanEqual,
1874 SpvOpULessThanEqual, SpvOpUndef, o ut);
1875 case Token::PLUS:
1876 return this->writeBinaryOperation(resultType, *operandType, lhs, rhs , SpvOpFAdd,
1877 SpvOpIAdd, SpvOpIAdd, SpvOpUndef, out);
1878 case Token::MINUS:
1879 return this->writeBinaryOperation(resultType, *operandType, lhs, rhs , SpvOpFSub,
1880 SpvOpISub, SpvOpISub, SpvOpUndef, out);
1881 case Token::STAR:
1882 if (b.fLeft->fType->kind() == Type::kMatrix_Kind &&
1883 b.fRight->fType->kind() == Type::kMatrix_Kind) {
1884 // matrix multiply
1885 SpvId result = this->nextId();
1886 this->writeInstruction(SpvOpMatrixTimesMatrix, this->getType(res ultType), result,
1887 lhs, rhs, out);
1888 return result;
1889 }
1890 return this->writeBinaryOperation(resultType, *operandType, lhs, rhs , SpvOpFMul,
1891 SpvOpIMul, SpvOpIMul, SpvOpUndef, out);
1892 case Token::SLASH:
1893 return this->writeBinaryOperation(resultType, *operandType, lhs, rhs , SpvOpFDiv,
1894 SpvOpSDiv, SpvOpUDiv, SpvOpUndef, out);
1895 case Token::PLUSEQ: {
1896 SpvId result = this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFAdd,
1897 SpvOpIAdd, SpvOpIAdd, SpvO pUndef, out);
1898 this->storeToLValue(*b.fLeft, result, out);
1899 return result;
1900 }
1901 case Token::MINUSEQ: {
1902 SpvId result = this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFSub,
1903 SpvOpISub, SpvOpISub, SpvO pUndef, out);
1904 this->storeToLValue(*b.fLeft, result, out);
1905 return result;
1906 }
1907 case Token::STAREQ: {
1908 if (b.fLeft->fType->kind() == Type::kMatrix_Kind &&
1909 b.fRight->fType->kind() == Type::kMatrix_Kind) {
1910 // matrix multiply
1911 SpvId result = this->nextId();
1912 this->writeInstruction(SpvOpMatrixTimesMatrix, this->getType(res ultType), result,
1913 lhs, rhs, out);
1914 this->storeToLValue(*b.fLeft, result, out);
1915 return result;
1916 }
1917 SpvId result = this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFMul,
1918 SpvOpIMul, SpvOpIMul, SpvO pUndef, out);
1919 this->storeToLValue(*b.fLeft, result, out);
1920 return result;
1921 }
1922 case Token::SLASHEQ: {
1923 SpvId result = this->writeBinaryOperation(resultType, *operandType, lhs, rhs, SpvOpFDiv,
1924 SpvOpSDiv, SpvOpUDiv, SpvO pUndef, out);
1925 this->storeToLValue(*b.fLeft, result, out);
1926 return result;
1927 }
1928 default:
1929 // FIXME: missing support for some operators (bitwise, &&=, ||=, shi ft...)
1930 ABORT("unsupported binary expression: %s", b.description().c_str());
1931 }
1932 }
1933
1934 SpvId SPIRVCodeGenerator::writeLogicalAnd(BinaryExpression& a, std::ostream& out ) {
1935 ASSERT(a.fOperator == Token::LOGICALAND);
1936 BoolLiteral falseLiteral(Position(), false);
1937 SpvId falseConstant = this->writeBoolLiteral(falseLiteral);
1938 SpvId lhs = this->writeExpression(*a.fLeft, out);
1939 SpvId rhsLabel = this->nextId();
1940 SpvId end = this->nextId();
1941 SpvId lhsBlock = fCurrentBlock;
1942 this->writeInstruction(SpvOpSelectionMerge, end, SpvSelectionControlMaskNone , out);
1943 this->writeInstruction(SpvOpBranchConditional, lhs, rhsLabel, end, out);
1944 this->writeLabel(rhsLabel, out);
1945 SpvId rhs = this->writeExpression(*a.fRight, out);
1946 SpvId rhsBlock = fCurrentBlock;
1947 this->writeInstruction(SpvOpBranch, end, out);
1948 this->writeLabel(end, out);
1949 SpvId result = this->nextId();
1950 this->writeInstruction(SpvOpPhi, this->getType(*kBool_Type), result, falseCo nstant, lhsBlock,
1951 rhs, rhsBlock, out);
1952 return result;
1953 }
1954
1955 SpvId SPIRVCodeGenerator::writeLogicalOr(BinaryExpression& o, std::ostream& out) {
1956 ASSERT(o.fOperator == Token::LOGICALOR);
1957 BoolLiteral trueLiteral(Position(), true);
1958 SpvId trueConstant = this->writeBoolLiteral(trueLiteral);
1959 SpvId lhs = this->writeExpression(*o.fLeft, out);
1960 SpvId rhsLabel = this->nextId();
1961 SpvId end = this->nextId();
1962 SpvId lhsBlock = fCurrentBlock;
1963 this->writeInstruction(SpvOpSelectionMerge, end, SpvSelectionControlMaskNone , out);
1964 this->writeInstruction(SpvOpBranchConditional, lhs, end, rhsLabel, out);
1965 this->writeLabel(rhsLabel, out);
1966 SpvId rhs = this->writeExpression(*o.fRight, out);
1967 SpvId rhsBlock = fCurrentBlock;
1968 this->writeInstruction(SpvOpBranch, end, out);
1969 this->writeLabel(end, out);
1970 SpvId result = this->nextId();
1971 this->writeInstruction(SpvOpPhi, this->getType(*kBool_Type), result, trueCon stant, lhsBlock,
1972 rhs, rhsBlock, out);
1973 return result;
1974 }
1975
1976 SpvId SPIRVCodeGenerator::writeTernaryExpression(TernaryExpression& t, std::ostr eam& out) {
1977 SpvId test = this->writeExpression(*t.fTest, out);
1978 if (t.fIfTrue->isConstant() && t.fIfFalse->isConstant()) {
1979 // both true and false are constants, can just use OpSelect
1980 SpvId result = this->nextId();
1981 SpvId trueId = this->writeExpression(*t.fIfTrue, out);
1982 SpvId falseId = this->writeExpression(*t.fIfFalse, out);
1983 this->writeInstruction(SpvOpSelect, this->getType(*t.fType), result, tes t, trueId, falseId,
1984 out);
1985 return result;
1986 }
1987 // was originally using OpPhi to choose the result, but for some reason that is crashing on
1988 // Adreno. Switched to storing the result in a temp variable as glslang does .
1989 SpvId var = this->nextId();
1990 this->writeInstruction(SpvOpVariable, this->getPointerType(t.fType, SpvStora geClassFunction),
1991 var, SpvStorageClassFunction, out);
1992 SpvId trueLabel = this->nextId();
1993 SpvId falseLabel = this->nextId();
1994 SpvId end = this->nextId();
1995 this->writeInstruction(SpvOpSelectionMerge, end, SpvSelectionControlMaskNone , out);
1996 this->writeInstruction(SpvOpBranchConditional, test, trueLabel, falseLabel, out);
1997 this->writeLabel(trueLabel, out);
1998 this->writeInstruction(SpvOpStore, var, this->writeExpression(*t.fIfTrue, ou t), out);
1999 this->writeInstruction(SpvOpBranch, end, out);
2000 this->writeLabel(falseLabel, out);
2001 this->writeInstruction(SpvOpStore, var, this->writeExpression(*t.fIfFalse, o ut), out);
2002 this->writeInstruction(SpvOpBranch, end, out);
2003 this->writeLabel(end, out);
2004 SpvId result = this->nextId();
2005 this->writeInstruction(SpvOpLoad, this->getType(*t.fType), result, var, out) ;
2006 return result;
2007 }
2008
2009 Expression* literal_1(const Type& type) {
2010 static IntLiteral int1(Position(), 1);
2011 static FloatLiteral float1(Position(), 1.0);
2012 if (type == *kInt_Type) {
2013 return &int1;
2014 }
2015 else if (type == *kFloat_Type) {
2016 return &float1;
2017 } else {
2018 ABORT("math is unsupported on type '%s'")
2019 }
2020 }
2021
2022 SpvId SPIRVCodeGenerator::writePrefixExpression(PrefixExpression& p, std::ostrea m& out) {
2023 SpvId expr = this->writeExpression(*p.fOperand, out);
2024 if (p.fOperator == Token::MINUS) {
2025 SpvId result = this->nextId();
2026 SpvId typeId = this->getType(*p.fType);
2027 if (is_float(*p.fType)) {
2028 this->writeInstruction(SpvOpFNegate, typeId, result, expr, out);
2029 } else if (is_signed(*p.fType)) {
2030 this->writeInstruction(SpvOpSNegate, typeId, result, expr, out);
2031 } else {
2032 ABORT("unsupported prefix expression %s", p.description().c_str());
2033 };
2034 return result;
2035 }
2036 switch (p.fOperator) {
2037 case Token::PLUS:
2038 return expr;
2039 case Token::PLUSPLUS: {
2040 SpvId one = this->writeExpression(*literal_1(*p.fType), out);
2041 SpvId result = this->writeBinaryOperation(*p.fType, *p.fType, expr, one, SpvOpFAdd,
2042 SpvOpIAdd, SpvOpIAdd, SpvO pUndef, out);
2043 this->storeToLValue(*p.fOperand, result, out);
2044 return result;
2045 }
2046 case Token::MINUSMINUS: {
2047 SpvId one = this->writeExpression(*literal_1(*p.fType), out);
2048 SpvId result = this->writeBinaryOperation(*p.fType, *p.fType, expr, one, SpvOpFSub,
2049 SpvOpISub, SpvOpISub, SpvO pUndef, out);
2050 this->storeToLValue(*p.fOperand, result, out);
2051 return result;
2052 }
2053 case Token::NOT: {
2054 ASSERT(p.fOperand->fType == kBool_Type);
2055 SpvId result = this->nextId();
2056 this->writeInstruction(SpvOpLogicalNot, this->getType(*p.fOperand->f Type), result,
2057 this->writeExpression(*p.fOperand, out), out) ;
2058 return result;
2059 }
2060 default:
2061 ABORT("unsupported prefix expression: %s", p.description().c_str());
2062 }
2063 }
2064
2065 SpvId SPIRVCodeGenerator::writePostfixExpression(PostfixExpression& p, std::ostr eam& out) {
2066 SpvId result = this->writeExpression(*p.fOperand, out);
2067 SpvId one = this->writeExpression(*literal_1(*p.fType), out);
2068 switch (p.fOperator) {
2069 case Token::PLUSPLUS: {
2070 SpvId temp = this->writeBinaryOperation(*p.fType, *p.fType, result, one, SpvOpFAdd,
2071 SpvOpIAdd, SpvOpIAdd, SpvOpU ndef, out);
2072 this->storeToLValue(*p.fOperand, temp, out);
2073 return result;
2074 }
2075 case Token::MINUSMINUS: {
2076 SpvId temp = this->writeBinaryOperation(*p.fType, *p.fType, result, one, SpvOpFSub,
2077 SpvOpISub, SpvOpISub, SpvOpU ndef, out);
2078 this->storeToLValue(*p.fOperand, temp, out);
2079 return result;
2080 }
2081 default:
2082 ABORT("unsupported postfix expression %s", p.description().c_str());
2083 }
2084 }
2085
2086 SpvId SPIRVCodeGenerator::writeBoolLiteral(BoolLiteral& b) {
2087 if (b.fValue) {
2088 if (fBoolTrue == 0) {
2089 fBoolTrue = this->nextId();
2090 this->writeInstruction(SpvOpConstantTrue, this->getType(*b.fType), f BoolTrue,
2091 fConstantBuffer);
2092 }
2093 return fBoolTrue;
2094 } else {
2095 if (fBoolFalse == 0) {
2096 fBoolFalse = this->nextId();
2097 this->writeInstruction(SpvOpConstantFalse, this->getType(*b.fType), fBoolFalse,
2098 fConstantBuffer);
2099 }
2100 return fBoolFalse;
2101 }
2102 }
2103
2104 SpvId SPIRVCodeGenerator::writeIntLiteral(IntLiteral& i) {
2105 if (i.fType == kInt_Type) {
2106 auto entry = fIntConstants.find(i.fValue);
2107 if (entry == fIntConstants.end()) {
2108 SpvId result = this->nextId();
2109 this->writeInstruction(SpvOpConstant, this->getType(*i.fType), resul t, (SpvId) i.fValue,
2110 fConstantBuffer);
2111 fIntConstants[i.fValue] = result;
2112 return result;
2113 }
2114 return entry->second;
2115 } else {
2116 ASSERT(i.fType == kUInt_Type);
2117 auto entry = fUIntConstants.find(i.fValue);
2118 if (entry == fUIntConstants.end()) {
2119 SpvId result = this->nextId();
2120 this->writeInstruction(SpvOpConstant, this->getType(*i.fType), resul t, (SpvId) i.fValue,
2121 fConstantBuffer);
2122 fUIntConstants[i.fValue] = result;
2123 return result;
2124 }
2125 return entry->second;
2126 }
2127 }
2128
2129 SpvId SPIRVCodeGenerator::writeFloatLiteral(FloatLiteral& f) {
2130 if (f.fType == kFloat_Type) {
2131 float value = (float) f.fValue;
2132 auto entry = fFloatConstants.find(value);
2133 if (entry == fFloatConstants.end()) {
2134 SpvId result = this->nextId();
2135 uint32_t bits;
2136 ASSERT(sizeof(bits) == sizeof(value));
2137 memcpy(&bits, &value, sizeof(bits));
2138 this->writeInstruction(SpvOpConstant, this->getType(*f.fType), resul t, bits,
2139 fConstantBuffer);
2140 fFloatConstants[value] = result;
2141 return result;
2142 }
2143 return entry->second;
2144 } else {
2145 ASSERT(f.fType == kDouble_Type);
2146 auto entry = fDoubleConstants.find(f.fValue);
2147 if (entry == fDoubleConstants.end()) {
2148 SpvId result = this->nextId();
2149 uint64_t bits;
2150 ASSERT(sizeof(bits) == sizeof(f.fValue));
2151 memcpy(&bits, &f.fValue, sizeof(bits));
2152 this->writeInstruction(SpvOpConstant, this->getType(*f.fType), resul t,
2153 bits & 0xffffffff, bits >> 32, fConstantBuffe r);
2154 fDoubleConstants[f.fValue] = result;
2155 return result;
2156 }
2157 return entry->second;
2158 }
2159 }
2160
2161 SpvId SPIRVCodeGenerator::writeFunctionStart(std::shared_ptr<FunctionDeclaration > f,
2162 std::ostream& out) {
2163 SpvId result = fFunctionMap[f];
2164 this->writeInstruction(SpvOpFunction, this->getType(*f->fReturnType), result ,
2165 SpvFunctionControlMaskNone, this->getFunctionType(f), out);
2166 this->writeInstruction(SpvOpName, result, f->fName.c_str(), fNameBuffer);
2167 for (size_t i = 0; i < f->fParameters.size(); i++) {
2168 SpvId id = this->nextId();
2169 fVariableMap[f->fParameters[i]] = id;
2170 SpvId type;
2171 type = this->getPointerType(f->fParameters[i]->fType, SpvStorageClassFun ction);
2172 this->writeInstruction(SpvOpFunctionParameter, type, id, out);
2173 }
2174 return result;
2175 }
2176
2177 SpvId SPIRVCodeGenerator::writeFunction(FunctionDefinition& f, std::ostream& out ) {
2178 SpvId result = this->writeFunctionStart(f.fDeclaration, out);
2179 this->writeLabel(this->nextId(), out);
2180 if (f.fDeclaration->fName == "main") {
2181 out << fGlobalInitializersBuffer.str();
2182 }
2183 std::stringstream bodyBuffer;
2184 this->writeBlock(*f.fBody, bodyBuffer);
2185 out << fVariableBuffer.str();
2186 fVariableBuffer.str("");
2187 out << bodyBuffer.str();
2188 if (fCurrentBlock) {
2189 this->writeInstruction(SpvOpReturn, out);
2190 }
2191 this->writeInstruction(SpvOpFunctionEnd, out);
2192 return result;
2193 }
2194
2195 void SPIRVCodeGenerator::writeLayout(const Layout& layout, SpvId target) {
2196 if (layout.fLocation >= 0) {
2197 this->writeInstruction(SpvOpDecorate, target, SpvDecorationLocation, lay out.fLocation,
2198 fDecorationBuffer);
2199 }
2200 if (layout.fBinding >= 0) {
2201 this->writeInstruction(SpvOpDecorate, target, SpvDecorationBinding, layo ut.fBinding,
2202 fDecorationBuffer);
2203 }
2204 if (layout.fIndex >= 0) {
2205 this->writeInstruction(SpvOpDecorate, target, SpvDecorationIndex, layout .fIndex,
2206 fDecorationBuffer);
2207 }
2208 if (layout.fSet >= 0) {
2209 this->writeInstruction(SpvOpDecorate, target, SpvDecorationDescriptorSet , layout.fSet,
2210 fDecorationBuffer);
2211 }
2212 if (layout.fBuiltin >= 0) {
2213 this->writeInstruction(SpvOpDecorate, target, SpvDecorationBuiltIn, layo ut.fBuiltin,
2214 fDecorationBuffer);
2215 }
2216 }
2217
2218 void SPIRVCodeGenerator::writeLayout(const Layout& layout, SpvId target, int mem ber) {
2219 if (layout.fLocation >= 0) {
2220 this->writeInstruction(SpvOpMemberDecorate, target, member, SpvDecoratio nLocation,
2221 layout.fLocation, fDecorationBuffer);
2222 }
2223 if (layout.fBinding >= 0) {
2224 this->writeInstruction(SpvOpMemberDecorate, target, member, SpvDecoratio nBinding,
2225 layout.fBinding, fDecorationBuffer);
2226 }
2227 if (layout.fIndex >= 0) {
2228 this->writeInstruction(SpvOpMemberDecorate, target, member, SpvDecoratio nIndex,
2229 layout.fIndex, fDecorationBuffer);
2230 }
2231 if (layout.fSet >= 0) {
2232 this->writeInstruction(SpvOpMemberDecorate, target, member, SpvDecoratio nDescriptorSet,
2233 layout.fSet, fDecorationBuffer);
2234 }
2235 if (layout.fBuiltin >= 0) {
2236 this->writeInstruction(SpvOpMemberDecorate, target, member, SpvDecoratio nBuiltIn,
2237 layout.fBuiltin, fDecorationBuffer);
2238 }
2239 }
2240
2241 SpvId SPIRVCodeGenerator::writeInterfaceBlock(InterfaceBlock& intf) {
2242 SpvId type = this->getType(*intf.fVariable->fType);
2243 SpvId result = this->nextId();
2244 this->writeInstruction(SpvOpDecorate, type, SpvDecorationBlock, fDecorationB uffer);
2245 SpvStorageClass_ storageClass = get_storage_class(intf.fVariable->fModifiers );
2246 SpvId ptrType = this->nextId();
2247 this->writeInstruction(SpvOpTypePointer, ptrType, storageClass, type, fConst antBuffer);
2248 this->writeInstruction(SpvOpVariable, ptrType, result, storageClass, fConsta ntBuffer);
2249 this->writeLayout(intf.fVariable->fModifiers.fLayout, result);
2250 fVariableMap[intf.fVariable] = result;
2251 return result;
2252 }
2253
2254 void SPIRVCodeGenerator::writeGlobalVars(VarDeclaration& decl, std::ostream& out ) {
2255 for (size_t i = 0; i < decl.fVars.size(); i++) {
2256 if (!decl.fVars[i]->fIsReadFrom && !decl.fVars[i]->fIsWrittenTo) {
2257 continue;
2258 }
2259 SpvStorageClass_ storageClass;
2260 if (decl.fVars[i]->fModifiers.fFlags & Modifiers::kIn_Flag) {
2261 storageClass = SpvStorageClassInput;
2262 } else if (decl.fVars[i]->fModifiers.fFlags & Modifiers::kOut_Flag) {
2263 storageClass = SpvStorageClassOutput;
2264 } else if (decl.fVars[i]->fModifiers.fFlags & Modifiers::kUniform_Flag) {
2265 if (decl.fVars[i]->fType->kind() == Type::kSampler_Kind) {
2266 storageClass = SpvStorageClassUniformConstant;
2267 } else {
2268 storageClass = SpvStorageClassUniform;
2269 }
2270 } else {
2271 storageClass = SpvStorageClassPrivate;
2272 }
2273 SpvId id = this->nextId();
2274 fVariableMap[decl.fVars[i]] = id;
2275 SpvId type = this->getPointerType(decl.fVars[i]->fType, storageClass);
2276 this->writeInstruction(SpvOpVariable, type, id, storageClass, fConstantB uffer);
2277 this->writeInstruction(SpvOpName, id, decl.fVars[i]->fName.c_str(), fNam eBuffer);
2278 if (decl.fVars[i]->fType->kind() == Type::kMatrix_Kind) {
2279 this->writeInstruction(SpvOpMemberDecorate, id, (SpvId) i, SpvDecora tionColMajor,
2280 fDecorationBuffer);
2281 this->writeInstruction(SpvOpMemberDecorate, id, (SpvId) i, SpvDecora tionMatrixStride,
2282 (SpvId) decl.fVars[i]->fType->stride(), fDeco rationBuffer);
2283 }
2284 if (decl.fValues[i]) {
2285 ASSERT(!fCurrentBlock);
2286 fCurrentBlock = -1;
2287 SpvId value = this->writeExpression(*decl.fValues[i], fGlobalInitial izersBuffer);
2288 this->writeInstruction(SpvOpStore, id, value, fGlobalInitializersBuf fer);
2289 fCurrentBlock = 0;
2290 }
2291 this->writeLayout(decl.fVars[i]->fModifiers.fLayout, id);
2292 }
2293 }
2294
2295 void SPIRVCodeGenerator::writeVarDeclaration(VarDeclaration& decl, std::ostream& out) {
2296 for (size_t i = 0; i < decl.fVars.size(); i++) {
2297 SpvId id = this->nextId();
2298 fVariableMap[decl.fVars[i]] = id;
2299 SpvId type = this->getPointerType(decl.fVars[i]->fType, SpvStorageClassF unction);
2300 this->writeInstruction(SpvOpVariable, type, id, SpvStorageClassFunction, fVariableBuffer);
2301 this->writeInstruction(SpvOpName, id, decl.fVars[i]->fName.c_str(), fNam eBuffer);
2302 if (decl.fValues[i]) {
2303 SpvId value = this->writeExpression(*decl.fValues[i], out);
2304 this->writeInstruction(SpvOpStore, id, value, out);
2305 }
2306 }
2307 }
2308
2309 void SPIRVCodeGenerator::writeStatement(Statement& s, std::ostream& out) {
2310 switch (s.fKind) {
2311 case Statement::kBlock_Kind:
2312 this->writeBlock((Block&) s, out);
2313 break;
2314 case Statement::kExpression_Kind:
2315 this->writeExpression(*((ExpressionStatement&) s).fExpression, out);
2316 break;
2317 case Statement::kReturn_Kind:
2318 this->writeReturnStatement((ReturnStatement&) s, out);
2319 break;
2320 case Statement::kVarDeclaration_Kind:
2321 this->writeVarDeclaration(*((VarDeclarationStatement&) s).fDeclarati on, out);
2322 break;
2323 case Statement::kIf_Kind:
2324 this->writeIfStatement((IfStatement&) s, out);
2325 break;
2326 case Statement::kFor_Kind:
2327 this->writeForStatement((ForStatement&) s, out);
2328 break;
2329 case Statement::kBreak_Kind:
2330 this->writeInstruction(SpvOpBranch, fBreakTarget.top(), out);
2331 break;
2332 case Statement::kContinue_Kind:
2333 this->writeInstruction(SpvOpBranch, fContinueTarget.top(), out);
2334 break;
2335 case Statement::kDiscard_Kind:
2336 this->writeInstruction(SpvOpKill, out);
2337 break;
2338 default:
2339 ABORT("unsupported statement: %s", s.description().c_str());
2340 }
2341 }
2342
2343 void SPIRVCodeGenerator::writeBlock(Block& b, std::ostream& out) {
2344 for (size_t i = 0; i < b.fStatements.size(); i++) {
2345 this->writeStatement(*b.fStatements[i], out);
2346 }
2347 }
2348
2349 void SPIRVCodeGenerator::writeIfStatement(IfStatement& stmt, std::ostream& out) {
2350 SpvId test = this->writeExpression(*stmt.fTest, out);
2351 SpvId ifTrue = this->nextId();
2352 SpvId ifFalse = this->nextId();
2353 if (stmt.fIfFalse) {
2354 SpvId end = this->nextId();
2355 this->writeInstruction(SpvOpSelectionMerge, end, SpvSelectionControlMask None, out);
2356 this->writeInstruction(SpvOpBranchConditional, test, ifTrue, ifFalse, ou t);
2357 this->writeLabel(ifTrue, out);
2358 this->writeStatement(*stmt.fIfTrue, out);
2359 if (fCurrentBlock) {
2360 this->writeInstruction(SpvOpBranch, end, out);
2361 }
2362 this->writeLabel(ifFalse, out);
2363 this->writeStatement(*stmt.fIfFalse, out);
2364 if (fCurrentBlock) {
2365 this->writeInstruction(SpvOpBranch, end, out);
2366 }
2367 this->writeLabel(end, out);
2368 } else {
2369 this->writeInstruction(SpvOpSelectionMerge, ifFalse, SpvSelectionControl MaskNone, out);
2370 this->writeInstruction(SpvOpBranchConditional, test, ifTrue, ifFalse, ou t);
2371 this->writeLabel(ifTrue, out);
2372 this->writeStatement(*stmt.fIfTrue, out);
2373 if (fCurrentBlock) {
2374 this->writeInstruction(SpvOpBranch, ifFalse, out);
2375 }
2376 this->writeLabel(ifFalse, out);
2377 }
2378 }
2379
2380 void SPIRVCodeGenerator::writeForStatement(ForStatement& f, std::ostream& out) {
2381 if (f.fInitializer) {
2382 this->writeStatement(*f.fInitializer, out);
2383 }
2384 SpvId header = this->nextId();
2385 SpvId start = this->nextId();
2386 SpvId body = this->nextId();
2387 SpvId next = this->nextId();
2388 fContinueTarget.push(next);
2389 SpvId end = this->nextId();
2390 fBreakTarget.push(end);
2391 this->writeInstruction(SpvOpBranch, header, out);
2392 this->writeLabel(header, out);
2393 this->writeInstruction(SpvOpLoopMerge, end, next, SpvLoopControlMaskNone, ou t);
2394 this->writeInstruction(SpvOpBranch, start, out);
2395 this->writeLabel(start, out);
2396 SpvId test = this->writeExpression(*f.fTest, out);
2397 this->writeInstruction(SpvOpBranchConditional, test, body, end, out);
2398 this->writeLabel(body, out);
2399 this->writeStatement(*f.fStatement, out);
2400 if (fCurrentBlock) {
2401 this->writeInstruction(SpvOpBranch, next, out);
2402 }
2403 this->writeLabel(next, out);
2404 if (f.fNext) {
2405 this->writeExpression(*f.fNext, out);
2406 }
2407 this->writeInstruction(SpvOpBranch, header, out);
2408 this->writeLabel(end, out);
2409 fBreakTarget.pop();
2410 fContinueTarget.pop();
2411 }
2412
2413 void SPIRVCodeGenerator::writeReturnStatement(ReturnStatement& r, std::ostream& out) {
2414 if (r.fExpression) {
2415 this->writeInstruction(SpvOpReturnValue, this->writeExpression(*r.fExpre ssion, out),
2416 out);
2417 } else {
2418 this->writeInstruction(SpvOpReturn, out);
2419 }
2420 }
2421
2422 void SPIRVCodeGenerator::writeInstructions(Program& program, std::ostream& out) {
2423 fGLSLExtendedInstructions = this->nextId();
2424 std::stringstream body;
2425 std::vector<SpvId> interfaceVars;
2426 // assign IDs to functions
2427 for (size_t i = 0; i < program.fElements.size(); i++) {
2428 if (program.fElements[i]->fKind == ProgramElement::kFunction_Kind) {
2429 FunctionDefinition& f = (FunctionDefinition&) *program.fElements[i];
2430 fFunctionMap[f.fDeclaration] = this->nextId();
2431 }
2432 }
2433 for (size_t i = 0; i < program.fElements.size(); i++) {
2434 if (program.fElements[i]->fKind == ProgramElement::kInterfaceBlock_Kind) {
2435 InterfaceBlock& intf = (InterfaceBlock&) *program.fElements[i];
2436 SpvId id = this->writeInterfaceBlock(intf);
2437 if ((intf.fVariable->fModifiers.fFlags & Modifiers::kIn_Flag) ||
2438 (intf.fVariable->fModifiers.fFlags & Modifiers::kOut_Flag)) {
2439 interfaceVars.push_back(id);
2440 }
2441 }
2442 }
2443 for (size_t i = 0; i < program.fElements.size(); i++) {
2444 if (program.fElements[i]->fKind == ProgramElement::kVar_Kind) {
2445 this->writeGlobalVars(((VarDeclaration&) *program.fElements[i]), bod y);
2446 }
2447 }
2448 for (size_t i = 0; i < program.fElements.size(); i++) {
2449 if (program.fElements[i]->fKind == ProgramElement::kFunction_Kind) {
2450 this->writeFunction(((FunctionDefinition&) *program.fElements[i]), b ody);
2451 }
2452 }
2453 std::shared_ptr<FunctionDeclaration> main = nullptr;
2454 for (auto entry : fFunctionMap) {
2455 if (entry.first->fName == "main") {
2456 main = entry.first;
2457 }
2458 }
2459 ASSERT(main);
2460 for (auto entry : fVariableMap) {
2461 std::shared_ptr<Variable> var = entry.first;
2462 if (var->fStorage == Variable::kGlobal_Storage &&
2463 ((var->fModifiers.fFlags & Modifiers::kIn_Flag) ||
2464 (var->fModifiers.fFlags & Modifiers::kOut_Flag))) {
2465 interfaceVars.push_back(entry.second);
2466 }
2467 }
2468 this->writeCapabilities(out);
2469 this->writeInstruction(SpvOpExtInstImport, fGLSLExtendedInstructions, "GLSL. std.450", out);
2470 this->writeInstruction(SpvOpMemoryModel, SpvAddressingModelLogical, SpvMemor yModelGLSL450, out);
2471 this->writeOpCode(SpvOpEntryPoint, (SpvId) (3 + (strlen(main->fName.c_str()) + 4) / 4) +
2472 (int32_t) interfaceVars.size(), out);
2473 switch (program.fKind) {
2474 case Program::kVertex_Kind:
2475 this->writeWord(SpvExecutionModelVertex, out);
2476 break;
2477 case Program::kFragment_Kind:
2478 this->writeWord(SpvExecutionModelFragment, out);
2479 break;
2480 }
2481 this->writeWord(fFunctionMap[main], out);
2482 this->writeString(main->fName.c_str(), out);
2483 for (int var : interfaceVars) {
2484 this->writeWord(var, out);
2485 }
2486 if (program.fKind == Program::kFragment_Kind) {
2487 this->writeInstruction(SpvOpExecutionMode,
2488 fFunctionMap[main],
2489 SpvExecutionModeOriginUpperLeft,
2490 out);
2491 }
2492 for (size_t i = 0; i < program.fElements.size(); i++) {
2493 if (program.fElements[i]->fKind == ProgramElement::kExtension_Kind) {
2494 this->writeInstruction(SpvOpSourceExtension,
2495 ((Extension&) *program.fElements[i]).fName.c_ str(),
2496 out);
2497 }
2498 }
2499
2500 out << fNameBuffer.str();
2501 out << fDecorationBuffer.str();
2502 out << fConstantBuffer.str();
2503 out << fExternalFunctionsBuffer.str();
2504 out << body.str();
2505 }
2506
2507 void SPIRVCodeGenerator::generateCode(Program& program, std::ostream& out) {
2508 this->writeWord(SpvMagicNumber, out);
2509 this->writeWord(SpvVersion, out);
2510 this->writeWord(SKSL_MAGIC, out);
2511 std::stringstream buffer;
2512 this->writeInstructions(program, buffer);
2513 this->writeWord(fIdCount, out);
2514 this->writeWord(0, out); // reserved, always zero
2515 out << buffer.str();
2516 }
2517
2518 }
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