1 #include <msp/core/maputils.h>
2 #include <msp/core/raii.h>
12 const SpirVGenerator::BuiltinFunctionInfo SpirVGenerator::builtin_functions[] =
14 { "radians", "f", "GLSL.std.450", GLSL450_RADIANS, { 1 }, 0 },
15 { "degrees", "f", "GLSL.std.450", GLSL450_DEGREES, { 1 }, 0 },
16 { "sin", "f", "GLSL.std.450", GLSL450_SIN, { 1 }, 0 },
17 { "cos", "f", "GLSL.std.450", GLSL450_COS, { 1 }, 0 },
18 { "tan", "f", "GLSL.std.450", GLSL450_TAN, { 1 }, 0 },
19 { "asin", "f", "GLSL.std.450", GLSL450_ASIN, { 1 }, 0 },
20 { "acos", "f", "GLSL.std.450", GLSL450_ACOS, { 1 }, 0 },
21 { "atan", "f", "GLSL.std.450", GLSL450_ATAN, { 1 }, 0 },
22 { "atan", "ff", "GLSL.std.450", GLSL450_ATAN2, { 1, 2 }, 0 },
23 { "sinh", "f", "GLSL.std.450", GLSL450_SINH, { 1 }, 0 },
24 { "cosh", "f", "GLSL.std.450", GLSL450_COSH, { 1 }, 0 },
25 { "tanh", "f", "GLSL.std.450", GLSL450_TANH, { 1 }, 0 },
26 { "asinh", "f", "GLSL.std.450", GLSL450_ASINH, { 1 }, 0 },
27 { "acosh", "f", "GLSL.std.450", GLSL450_ACOSH, { 1 }, 0 },
28 { "atanh", "f", "GLSL.std.450", GLSL450_ATANH, { 1 }, 0 },
29 { "pow", "ff", "GLSL.std.450", GLSL450_POW, { 1, 2 }, 0 },
30 { "exp", "f", "GLSL.std.450", GLSL450_EXP, { 1 }, 0 },
31 { "log", "f", "GLSL.std.450", GLSL450_LOG, { 1 }, 0 },
32 { "exp2", "f", "GLSL.std.450", GLSL450_EXP2, { 1 }, 0 },
33 { "log2", "f", "GLSL.std.450", GLSL450_LOG2, { 1 }, 0 },
34 { "sqrt", "f", "GLSL.std.450", GLSL450_SQRT, { 1 }, 0 },
35 { "inversesqrt", "f", "GLSL.std.450", GLSL450_INVERSE_SQRT, { 1 }, 0 },
36 { "abs", "f", "GLSL.std.450", GLSL450_F_ABS, { 1 }, 0 },
37 { "abs", "i", "GLSL.std.450", GLSL450_S_ABS, { 1 }, 0 },
38 { "sign", "f", "GLSL.std.450", GLSL450_F_SIGN, { 1 }, 0 },
39 { "sign", "i", "GLSL.std.450", GLSL450_S_SIGN, { 1 }, 0 },
40 { "floor", "f", "GLSL.std.450", GLSL450_FLOOR, { 1 }, 0 },
41 { "trunc", "f", "GLSL.std.450", GLSL450_TRUNC, { 1 }, 0 },
42 { "round", "f", "GLSL.std.450", GLSL450_ROUND, { 1 }, 0 },
43 { "roundEven", "f", "GLSL.std.450", GLSL450_ROUND_EVEN, { 1 }, 0 },
44 { "ceil", "f", "GLSL.std.450", GLSL450_CEIL, { 1 }, 0 },
45 { "fract", "f", "GLSL.std.450", GLSL450_FRACT, { 1 }, 0 },
46 { "mod", "f", "", OP_F_MOD, { 1, 2 }, 0 },
47 { "min", "ff", "GLSL.std.450", GLSL450_F_MIN, { 1, 2 }, 0 },
48 { "min", "ii", "GLSL.std.450", GLSL450_S_MIN, { 1, 2 }, 0 },
49 { "max", "ff", "GLSL.std.450", GLSL450_F_MAX, { 1, 2 }, 0 },
50 { "max", "ii", "GLSL.std.450", GLSL450_S_MAX, { 1, 2 }, 0 },
51 { "clamp", "fff", "GLSL.std.450", GLSL450_F_CLAMP, { 1, 2, 3 }, 0 },
52 { "clamp", "iii", "GLSL.std.450", GLSL450_S_CLAMP, { 1, 2, 3 }, 0 },
53 { "mix", "fff", "GLSL.std.450", GLSL450_F_MIX, { 1, 2, 3 }, 0 },
54 { "mix", "ffb", "", OP_SELECT, { 3, 2, 1 }, 0 },
55 { "mix", "iib", "", OP_SELECT, { 3, 2, 1 }, 0 },
56 { "step", "ff", "GLSL.std.450", GLSL450_F_STEP, { 1, 2 }, 0 },
57 { "smoothstep", "fff", "GLSL.std.450", GLSL450_F_SMOOTH_STEP, { 1, 2, 3 }, 0 },
58 { "isnan", "f", "", OP_IS_NAN, { 1 }, 0 },
59 { "isinf", "f", "", OP_IS_INF, { 1 }, 0 },
60 { "fma", "fff", "GLSL.std.450", GLSL450_F_FMA, { 1, 2, 3 }, 0 },
61 { "length", "f", "GLSL.std.450", GLSL450_LENGTH, { 1 }, 0 },
62 { "distance", "ff", "GLSL.std.450", GLSL450_DISTANCE, { 1, 2 }, 0 },
63 { "dot", "ff", "", OP_DOT, { 1, 2 }, 0 },
64 { "cross", "ff", "GLSL.std.450", GLSL450_CROSS, { 1, 2 }, 0 },
65 { "normalize", "f", "GLSL.std.450", GLSL450_NORMALIZE, { 1 }, 0 },
66 { "faceforward", "fff", "GLSL.std.450", GLSL450_FACE_FORWARD, { 1, 2, 3 }, 0 },
67 { "reflect", "ff", "GLSL.std.450", GLSL450_REFLECT, { 1, 2 }, 0 },
68 { "refract", "fff", "GLSL.std.450", GLSL450_REFRACT, { 1, 2, 3 }, 0 },
69 { "matrixCompMult", "ff", "", 0, { 0 }, &SpirVGenerator::visit_builtin_matrix_comp_mult },
70 { "outerProduct", "ff", "", OP_OUTER_PRODUCT, { 1, 2 }, 0 },
71 { "transpose", "f", "", OP_TRANSPOSE, { 1 }, 0 },
72 { "determinant", "f", "GLSL.std.450", GLSL450_DETERMINANT, { 1 }, 0 },
73 { "inverse", "f", "GLSL.std.450", GLSL450_MATRIX_INVERSE, { 1 }, 0 },
74 { "lessThan", "ff", "", OP_F_ORD_LESS_THAN, { 1, 2 }, 0 },
75 { "lessThan", "ii", "", OP_S_LESS_THAN, { 1, 2 }, 0 },
76 { "lessThanEqual", "ff", "", OP_F_ORD_LESS_THAN_EQUAL, { 1, 2 }, 0 },
77 { "lessThanEqual", "ii", "", OP_S_LESS_THAN_EQUAL, { 1, 2 }, 0 },
78 { "greaterThan", "ff", "", OP_F_ORD_GREATER_THAN, { 1, 2 }, 0 },
79 { "greaterThan", "ii", "", OP_S_GREATER_THAN, { 1, 2 }, 0 },
80 { "greaterThanEqual", "ff", "", OP_F_ORD_GREATER_THAN_EQUAL, { 1, 2 }, 0 },
81 { "greaterThanEqual", "ii", "", OP_S_GREATER_THAN_EQUAL, { 1, 2 }, 0 },
82 { "equal", "ff", "", OP_F_ORD_EQUAL, { 1, 2 }, 0 },
83 { "equal", "ii", "", OP_I_EQUAL, { 1, 2 }, 0 },
84 { "notEqual", "ff", "", OP_F_ORD_NOT_EQUAL, { 1, 2 }, 0 },
85 { "notEqual", "ii", "", OP_I_NOT_EQUAL, { 1, 2 }, 0 },
86 { "any", "b", "", OP_ANY, { 1 }, 0 },
87 { "all", "b", "", OP_ALL, { 1 }, 0 },
88 { "not", "b", "", OP_LOGICAL_NOT, { 1 }, 0 },
89 { "bitfieldExtract", "iii", "", OP_BIT_FIELD_S_EXTRACT, { 1, 2, 3 }, 0 },
90 { "bitfieldInsert", "iiii", "", OP_BIT_FIELD_INSERT, { 1, 2, 3, 4 }, 0 },
91 { "bitfieldReverse", "i", "", OP_BIT_REVERSE, { 1 }, 0 },
92 { "bitCount", "i", "", OP_BIT_COUNT, { 1 }, 0 },
93 { "findLSB", "i", "GLSL.std.450", GLSL450_FIND_I_LSB, { 1 }, 0 },
94 { "findMSB", "i", "GLSL.std.450", GLSL450_FIND_S_MSB, { 1 }, 0 },
95 { "textureSize", "", "", OP_IMAGE_QUERY_SIZE_LOD, { 1, 2 }, 0 },
96 { "texture", "", "", 0, { }, &SpirVGenerator::visit_builtin_texture },
97 { "textureLod", "", "", 0, { }, &SpirVGenerator::visit_builtin_texture },
98 { "texelFetch", "", "", 0, { }, &SpirVGenerator::visit_builtin_texel_fetch },
99 { "EmitVertex", "", "", OP_EMIT_VERTEX, { }, 0 },
100 { "EndPrimitive", "", "", OP_END_PRIMITIVE, { }, 0 },
101 { "dFdx", "f", "", OP_DP_DX, { 1 }, 0 },
102 { "dFdy", "f", "", OP_DP_DY, { 1 }, 0 },
103 { "dFdxFine", "f", "", OP_DP_DX_FINE, { 1 }, 0 },
104 { "dFdyFine", "f", "", OP_DP_DY_FINE, { 1 }, 0 },
105 { "dFdxCoarse", "f", "", OP_DP_DX_COARSE, { 1 }, 0 },
106 { "dFdyCoarse", "f", "", OP_DP_DY_COARSE, { 1 }, 0 },
107 { "fwidth", "f", "", OP_FWIDTH, { 1 }, 0 },
108 { "fwidthFine", "f", "", OP_FWIDTH_FINE, { 1 }, 0 },
109 { "fwidthCoarse", "f", "", OP_FWIDTH_COARSE, { 1 }, 0 },
110 { "interpolateAtCentroid", "", "", 0, { }, &SpirVGenerator::visit_builtin_interpolate },
111 { "interpolateAtSample", "", "", 0, { }, &SpirVGenerator::visit_builtin_interpolate },
112 { "interpolateAtOffset", "", "", 0, { }, &SpirVGenerator::visit_builtin_interpolate },
113 { "", "", "", 0, { }, 0 }
116 SpirVGenerator::SpirVGenerator():
121 r_expression_result_id(0),
122 constant_expression(false),
123 spec_constant(false),
125 composite_access(false),
126 r_composite_base_id(0),
128 assignment_source_id(0),
129 loop_merge_block_id(0),
130 loop_continue_target_id(0)
133 void SpirVGenerator::apply(Module &module)
135 use_capability(CAP_SHADER);
137 for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
140 interface_layouts.clear();
141 i->content.visit(*this);
144 writer.finalize(SPIRV_GENERATOR_MSP, next_id);
147 SpirVGenerator::StorageClass SpirVGenerator::get_interface_storage(const string &iface, bool block)
150 return STORAGE_INPUT;
151 else if(iface=="out")
152 return STORAGE_OUTPUT;
153 else if(iface=="uniform")
154 return (block ? STORAGE_UNIFORM : STORAGE_UNIFORM_CONSTANT);
155 else if(iface.empty())
156 return STORAGE_PRIVATE;
158 throw invalid_argument("SpirVGenerator::get_interface_storage");
161 SpirVGenerator::BuiltinSemantic SpirVGenerator::get_builtin_semantic(const string &name)
163 if(name=="gl_Position")
164 return BUILTIN_POSITION;
165 else if(name=="gl_PointSize")
166 return BUILTIN_POINT_SIZE;
167 else if(name=="gl_ClipDistance")
168 return BUILTIN_CLIP_DISTANCE;
169 else if(name=="gl_VertexID")
170 return BUILTIN_VERTEX_ID;
171 else if(name=="gl_InstanceID")
172 return BUILTIN_INSTANCE_ID;
173 else if(name=="gl_PrimitiveID" || name=="gl_PrimitiveIDIn")
174 return BUILTIN_PRIMITIVE_ID;
175 else if(name=="gl_InvocationID")
176 return BUILTIN_INVOCATION_ID;
177 else if(name=="gl_Layer")
178 return BUILTIN_LAYER;
179 else if(name=="gl_FragCoord")
180 return BUILTIN_FRAG_COORD;
181 else if(name=="gl_PointCoord")
182 return BUILTIN_POINT_COORD;
183 else if(name=="gl_FrontFacing")
184 return BUILTIN_FRONT_FACING;
185 else if(name=="gl_SampleId")
186 return BUILTIN_SAMPLE_ID;
187 else if(name=="gl_SamplePosition")
188 return BUILTIN_SAMPLE_POSITION;
189 else if(name=="gl_FragDepth")
190 return BUILTIN_FRAG_DEPTH;
192 throw invalid_argument("SpirVGenerator::get_builtin_semantic");
195 void SpirVGenerator::use_capability(Capability cap)
197 if(used_capabilities.count(cap))
200 used_capabilities.insert(cap);
201 writer.write_op(content.capabilities, OP_CAPABILITY, cap);
204 SpirVGenerator::Id SpirVGenerator::import_extension(const string &name)
206 Id &ext_id = imported_extension_ids[name];
210 writer.begin_op(content.extensions, OP_EXT_INST_IMPORT);
211 writer.write(ext_id);
212 writer.write_string(name);
213 writer.end_op(OP_EXT_INST_IMPORT);
218 SpirVGenerator::Id SpirVGenerator::get_id(Node &node) const
220 return get_item(declared_ids, &node).id;
223 SpirVGenerator::Id SpirVGenerator::allocate_id(Node &node, Id type_id)
226 insert_unique(declared_ids, &node, Declaration(id, type_id));
230 SpirVGenerator::Id SpirVGenerator::write_constant(Id type_id, Word value, bool spec)
232 Id const_id = next_id++;
233 if(is_scalar_type(type_id, BasicTypeDeclaration::BOOL))
235 Opcode opcode = (value ? (spec ? OP_SPEC_CONSTANT_TRUE : OP_CONSTANT_TRUE) :
236 (spec ? OP_SPEC_CONSTANT_FALSE : OP_CONSTANT_FALSE));
237 writer.write_op(content.globals, opcode, type_id, const_id);
241 Opcode opcode = (spec ? OP_SPEC_CONSTANT : OP_CONSTANT);
242 writer.write_op(content.globals, opcode, type_id, const_id, value);
247 SpirVGenerator::ConstantKey SpirVGenerator::get_constant_key(Id type_id, const Variant &value)
249 if(value.check_type<bool>())
250 return ConstantKey(type_id, value.value<bool>());
251 else if(value.check_type<int>())
252 return ConstantKey(type_id, value.value<int>());
253 else if(value.check_type<float>())
254 return ConstantKey(type_id, value.value<float>());
256 throw invalid_argument("SpirVGenerator::get_constant_key");
259 SpirVGenerator::Id SpirVGenerator::get_constant_id(Id type_id, const Variant &value)
261 ConstantKey key = get_constant_key(type_id, value);
262 Id &const_id = constant_ids[key];
264 const_id = write_constant(type_id, key.int_value, false);
268 SpirVGenerator::Id SpirVGenerator::get_vector_constant_id(Id type_id, unsigned size, Id scalar_id)
270 Id &const_id = constant_ids[get_constant_key(type_id, static_cast<int>(scalar_id))];
273 const_id = next_id++;
274 writer.begin_op(content.globals, OP_CONSTANT_COMPOSITE, 3+size);
275 writer.write(type_id);
276 writer.write(const_id);
277 for(unsigned i=0; i<size; ++i)
278 writer.write(scalar_id);
279 writer.end_op(OP_CONSTANT_COMPOSITE);
284 SpirVGenerator::Id SpirVGenerator::get_standard_type_id(BasicTypeDeclaration::Kind kind, unsigned size)
286 Id base_id = (size>1 ? get_standard_type_id(kind, 1) : 0);
287 Id &type_id = standard_type_ids[TypeKey(base_id, (size>1 ? size : static_cast<unsigned>(kind)))];
292 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, base_id, size);
293 else if(kind==BasicTypeDeclaration::VOID)
294 writer.write_op(content.globals, OP_TYPE_VOID, type_id);
295 else if(kind==BasicTypeDeclaration::BOOL)
296 writer.write_op(content.globals, OP_TYPE_BOOL, type_id);
297 else if(kind==BasicTypeDeclaration::INT)
298 writer.write_op(content.globals, OP_TYPE_INT, type_id, 32, 1);
299 else if(kind==BasicTypeDeclaration::FLOAT)
300 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, 32);
302 throw invalid_argument("SpirVGenerator::get_standard_type_id");
307 bool SpirVGenerator::is_scalar_type(Id type_id, BasicTypeDeclaration::Kind kind) const
309 map<TypeKey, Id>::const_iterator i = standard_type_ids.find(TypeKey(0, kind));
310 return (i!=standard_type_ids.end() && i->second==type_id);
313 SpirVGenerator::Id SpirVGenerator::get_array_type_id(TypeDeclaration &base_type, Id size_id)
315 Id base_type_id = get_id(base_type);
316 Id &array_type_id = array_type_ids[TypeKey(base_type_id, size_id)];
319 array_type_id = next_id++;
321 writer.write_op(content.globals, OP_TYPE_ARRAY, array_type_id, base_type_id, size_id);
323 writer.write_op(content.globals, OP_TYPE_RUNTIME_ARRAY, array_type_id, base_type_id);
325 unsigned stride = MemoryRequirementsCalculator().apply(base_type).stride;
326 writer.write_op_decorate(array_type_id, DECO_ARRAY_STRIDE, stride);
329 return array_type_id;
332 SpirVGenerator::Id SpirVGenerator::get_pointer_type_id(Id type_id, StorageClass storage)
334 Id &ptr_type_id = pointer_type_ids[TypeKey(type_id, storage)];
337 ptr_type_id = next_id++;
338 writer.write_op(content.globals, OP_TYPE_POINTER, ptr_type_id, storage, type_id);
343 SpirVGenerator::Id SpirVGenerator::get_variable_type_id(const VariableDeclaration &var)
345 if(const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var.type_declaration))
346 if(basic->kind==BasicTypeDeclaration::ARRAY)
351 SetFlag set_const(constant_expression);
352 r_expression_result_id = 0;
353 var.array_size->visit(*this);
354 size_id = r_expression_result_id;
357 size_id = get_constant_id(get_standard_type_id(BasicTypeDeclaration::INT, 1), 1);
358 return get_array_type_id(*basic->base_type, size_id);
361 return get_id(*var.type_declaration);
364 SpirVGenerator::Id SpirVGenerator::get_load_id(VariableDeclaration &var)
366 Id &load_result_id = variable_load_ids[&var];
369 load_result_id = next_id++;
370 writer.write_op(content.function_body, OP_LOAD, get_variable_type_id(var), load_result_id, get_id(var));
372 return load_result_id;
375 void SpirVGenerator::prune_loads(Id min_id)
377 for(map<const VariableDeclaration *, Id>::iterator i=variable_load_ids.begin(); i!=variable_load_ids.end(); )
379 if(i->second>=min_id)
380 variable_load_ids.erase(i++);
386 SpirVGenerator::Id SpirVGenerator::begin_expression(Opcode opcode, Id type_id, unsigned n_args)
388 bool has_result = (opcode==OP_FUNCTION_CALL || !is_scalar_type(type_id, BasicTypeDeclaration::VOID));
389 if(!constant_expression)
391 if(!current_function)
392 throw internal_error("non-constant expression outside a function");
394 writer.begin_op(content.function_body, opcode, (n_args ? 1+has_result*2+n_args : 0));
396 else if(opcode==OP_COMPOSITE_CONSTRUCT)
397 writer.begin_op(content.globals, (spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE),
398 (n_args ? 1+has_result*2+n_args : 0));
399 else if(!spec_constant)
400 throw internal_error("invalid non-specialization constant expression");
402 writer.begin_op(content.globals, OP_SPEC_CONSTANT_OP, (n_args ? 2+has_result*2+n_args : 0));
404 Id result_id = next_id++;
407 writer.write(type_id);
408 writer.write(result_id);
410 if(spec_constant && opcode!=OP_COMPOSITE_CONSTRUCT)
411 writer.write(opcode);
416 void SpirVGenerator::end_expression(Opcode opcode)
418 if(constant_expression)
419 opcode = (opcode==OP_COMPOSITE_CONSTRUCT ? spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE : OP_SPEC_CONSTANT_OP);
420 writer.end_op(opcode);
423 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id arg_id)
425 Id result_id = begin_expression(opcode, type_id, 1);
426 writer.write(arg_id);
427 end_expression(opcode);
431 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id left_id, Id right_id)
433 Id result_id = begin_expression(opcode, type_id, 2);
434 writer.write(left_id);
435 writer.write(right_id);
436 end_expression(opcode);
440 void SpirVGenerator::write_deconstruct(Id elem_type_id, Id composite_id, Id *elem_ids, unsigned n_elems)
442 for(unsigned i=0; i<n_elems; ++i)
444 elem_ids[i] = begin_expression(OP_COMPOSITE_EXTRACT, elem_type_id, 2);
445 writer.write(composite_id);
447 end_expression(OP_COMPOSITE_EXTRACT);
451 SpirVGenerator::Id SpirVGenerator::write_construct(Id type_id, const Id *elem_ids, unsigned n_elems)
453 Id result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, type_id, n_elems);
454 for(unsigned i=0; i<n_elems; ++i)
455 writer.write(elem_ids[i]);
456 end_expression(OP_COMPOSITE_CONSTRUCT);
461 void SpirVGenerator::visit(Block &block)
463 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
467 void SpirVGenerator::visit(Literal &literal)
469 Id type_id = get_id(*literal.type);
471 r_expression_result_id = write_constant(type_id, get_constant_key(type_id, literal.value).int_value, true);
473 r_expression_result_id = get_constant_id(type_id, literal.value);
474 r_constant_result = true;
477 void SpirVGenerator::visit(VariableReference &var)
479 if(constant_expression || var.declaration->constant)
481 if(!var.declaration->constant)
482 throw internal_error("reference to non-constant variable in constant context");
484 r_expression_result_id = get_id(*var.declaration);
485 r_constant_result = true;
488 else if(!current_function)
489 throw internal_error("non-constant context outside a function");
491 r_constant_result = false;
494 r_composite_base = var.declaration;
495 r_expression_result_id = 0;
497 else if(assignment_source_id)
499 writer.write_op(content.function_body, OP_STORE, get_id(*var.declaration), assignment_source_id);
500 variable_load_ids[var.declaration] = assignment_source_id;
501 r_expression_result_id = assignment_source_id;
504 r_expression_result_id = get_load_id(*var.declaration);
507 void SpirVGenerator::visit(InterfaceBlockReference &iface)
509 if(!composite_access || !current_function)
510 throw internal_error("invalid interface block reference");
512 r_composite_base = iface.declaration;
513 r_expression_result_id = 0;
514 r_constant_result = false;
517 void SpirVGenerator::generate_composite_access(TypeDeclaration &result_type)
520 Id result_type_id = get_id(result_type);
521 Id access_type_id = result_type_id;
524 if(constant_expression)
525 throw internal_error("composite access through pointer in constant context");
527 Id int32_type_id = get_standard_type_id(BasicTypeDeclaration::INT, 1);
528 for(vector<unsigned>::iterator i=r_composite_chain.begin(); i!=r_composite_chain.end(); ++i)
529 *i = (*i<0x400000 ? get_constant_id(int32_type_id, static_cast<int>(*i)) : *i&0x3FFFFF);
531 /* Find the storage class of the base and obtain appropriate pointer type
533 const Declaration &base_decl = get_item(declared_ids, r_composite_base);
534 map<TypeKey, Id>::const_iterator i = pointer_type_ids.begin();
535 for(; (i!=pointer_type_ids.end() && i->second!=base_decl.type_id); ++i) ;
536 if(i==pointer_type_ids.end())
537 throw internal_error("could not find storage class");
538 access_type_id = get_pointer_type_id(result_type_id, static_cast<StorageClass>(i->first.detail));
540 opcode = OP_ACCESS_CHAIN;
542 else if(assignment_source_id)
543 throw internal_error("assignment to temporary composite");
546 for(vector<unsigned>::iterator i=r_composite_chain.begin(); i!=r_composite_chain.end(); ++i)
547 for(map<ConstantKey, Id>::iterator j=constant_ids.begin(); (*i>=0x400000 && j!=constant_ids.end()); ++j)
548 if(j->second==(*i&0x3FFFFF))
549 *i = j->first.int_value;
551 opcode = OP_COMPOSITE_EXTRACT;
554 Id access_id = begin_expression(opcode, access_type_id, 1+r_composite_chain.size());
555 writer.write(r_composite_base_id);
556 for(vector<unsigned>::const_iterator i=r_composite_chain.begin(); i!=r_composite_chain.end(); ++i)
558 end_expression(opcode);
560 r_constant_result = false;
563 if(assignment_source_id)
565 writer.write_op(content.function_body, OP_STORE, access_id, assignment_source_id);
566 r_expression_result_id = assignment_source_id;
569 r_expression_result_id = write_expression(OP_LOAD, result_type_id, access_id);
572 r_expression_result_id = access_id;
575 void SpirVGenerator::visit_composite(Expression &base_expr, unsigned index, TypeDeclaration &type)
577 if(!composite_access)
579 r_composite_base = 0;
580 r_composite_base_id = 0;
581 r_composite_chain.clear();
585 SetFlag set_composite(composite_access);
586 base_expr.visit(*this);
589 if(!r_composite_base_id)
590 r_composite_base_id = (r_composite_base ? get_id(*r_composite_base) : r_expression_result_id);
592 r_composite_chain.push_back(index);
593 if(!composite_access)
594 generate_composite_access(type);
596 r_expression_result_id = 0;
599 void SpirVGenerator::visit_isolated(Expression &expr)
601 SetForScope<Id> clear_assign(assignment_source_id, 0);
602 SetFlag clear_composite(composite_access, false);
603 SetForScope<Node *> clear_base(r_composite_base, 0);
604 SetForScope<Id> clear_base_id(r_composite_base_id, 0);
605 vector<unsigned> saved_chain;
606 swap(saved_chain, r_composite_chain);
608 swap(saved_chain, r_composite_chain);
611 void SpirVGenerator::visit(MemberAccess &memacc)
613 visit_composite(*memacc.left, memacc.index, *memacc.type);
616 void SpirVGenerator::visit(Swizzle &swizzle)
619 visit_composite(*swizzle.left, swizzle.components[0], *swizzle.type);
620 else if(assignment_source_id)
622 const BasicTypeDeclaration &basic = dynamic_cast<const BasicTypeDeclaration &>(*swizzle.left->type);
625 for(unsigned i=0; i<swizzle.count; ++i)
626 mask |= 1<<swizzle.components[i];
628 visit_isolated(*swizzle.left);
630 Id combined_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.left->type), 2+basic.size);
631 writer.write(r_expression_result_id);
632 writer.write(assignment_source_id);
633 for(unsigned i=0; i<basic.size; ++i)
634 writer.write(i+((mask>>i)&1)*basic.size);
635 end_expression(OP_VECTOR_SHUFFLE);
637 SetForScope<Id> set_assign(assignment_source_id, combined_id);
638 swizzle.left->visit(*this);
640 r_expression_result_id = combined_id;
644 swizzle.left->visit(*this);
645 Id left_id = r_expression_result_id;
647 r_expression_result_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.type), 2+swizzle.count);
648 writer.write(left_id);
649 writer.write(left_id);
650 for(unsigned i=0; i<swizzle.count; ++i)
651 writer.write(swizzle.components[i]);
652 end_expression(OP_VECTOR_SHUFFLE);
654 r_constant_result = false;
657 void SpirVGenerator::visit(UnaryExpression &unary)
659 unary.expression->visit(*this);
661 char oper = unary.oper->token[0];
662 char oper2 = unary.oper->token[1];
663 if(oper=='+' && !oper2)
666 BasicTypeDeclaration &basic = dynamic_cast<BasicTypeDeclaration &>(*unary.expression->type);
667 BasicTypeDeclaration &elem = *get_element_type(basic);
669 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
670 /* SPIR-V allows constant operations on floating-point values only for
672 throw internal_error("invalid operands for constant unary expression");
674 Id result_type_id = get_id(*unary.type);
675 Opcode opcode = OP_NOP;
677 r_constant_result = false;
679 opcode = OP_LOGICAL_NOT;
682 else if(oper=='-' && !oper2)
684 opcode = (elem.kind==BasicTypeDeclaration::INT ? OP_S_NEGATE : OP_F_NEGATE);
686 if(basic.kind==BasicTypeDeclaration::MATRIX)
688 Id column_type_id = get_id(*basic.base_type);
689 unsigned n_columns = basic.size&0xFFFF;
691 write_deconstruct(column_type_id, r_expression_result_id, column_ids, n_columns);
692 for(unsigned i=0; i<n_columns; ++i)
693 column_ids[i] = write_expression(opcode, column_type_id, column_ids[i]);
694 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
698 else if((oper=='+' || oper=='-') && oper2==oper)
700 if(constant_expression)
701 throw internal_error("increment or decrement in constant expression");
704 if(elem.kind==BasicTypeDeclaration::INT)
706 opcode = (oper=='+' ? OP_I_ADD : OP_I_SUB);
707 one_id = get_constant_id(get_id(elem), 1);
709 else if(elem.kind==BasicTypeDeclaration::FLOAT)
711 opcode = (oper=='+' ? OP_F_ADD : OP_F_SUB);
712 one_id = get_constant_id(get_id(elem), 1.0f);
715 throw internal_error("invalid increment/decrement");
717 if(basic.kind==BasicTypeDeclaration::VECTOR)
718 one_id = get_vector_constant_id(result_type_id, basic.size, one_id);
720 Id post_value_id = write_expression(opcode, result_type_id, r_expression_result_id, one_id);
722 SetForScope<Id> set_assign(assignment_source_id, post_value_id);
723 unary.expression->visit(*this);
725 r_expression_result_id = (unary.oper->type==Operator::POSTFIX ? r_expression_result_id : post_value_id);
730 throw internal_error("unknown unary operator");
732 r_expression_result_id = write_expression(opcode, result_type_id, r_expression_result_id);
735 void SpirVGenerator::visit(BinaryExpression &binary)
737 char oper = binary.oper->token[0];
740 visit_isolated(*binary.right);
741 return visit_composite(*binary.left, 0x400000|r_expression_result_id, *binary.type);
744 if(assignment_source_id)
745 throw internal_error("invalid binary expression in assignment target");
747 BasicTypeDeclaration &basic_left = dynamic_cast<BasicTypeDeclaration &>(*binary.left->type);
748 BasicTypeDeclaration &basic_right = dynamic_cast<BasicTypeDeclaration &>(*binary.right->type);
749 // Expression resolver ensures that element types are the same
750 BasicTypeDeclaration &elem = *get_element_type(basic_left);
752 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
753 /* SPIR-V allows constant operations on floating-point values only for
755 throw internal_error("invalid operands for constant binary expression");
757 binary.left->visit(*this);
758 Id left_id = r_expression_result_id;
759 binary.right->visit(*this);
760 Id right_id = r_expression_result_id;
762 Id result_type_id = get_id(*binary.type);
763 Opcode opcode = OP_NOP;
764 bool swap_operands = false;
766 r_constant_result = false;
768 char oper2 = binary.oper->token[1];
769 if((oper=='<' || oper=='>') && oper2!=oper)
771 if(basic_left.kind==BasicTypeDeclaration::INT)
772 opcode = (oper=='<' ? (oper2=='=' ? OP_S_LESS_THAN_EQUAL : OP_S_LESS_THAN) :
773 (oper2=='=' ? OP_S_GREATER_THAN_EQUAL : OP_S_GREATER_THAN));
774 else if(basic_left.kind==BasicTypeDeclaration::FLOAT)
775 opcode = (oper=='<' ? (oper2=='=' ? OP_F_ORD_LESS_THAN_EQUAL : OP_F_ORD_LESS_THAN) :
776 (oper2=='=' ? OP_F_ORD_GREATER_THAN_EQUAL : OP_F_ORD_GREATER_THAN));
778 else if((oper=='=' || oper=='!') && oper2=='=')
780 if(elem.kind==BasicTypeDeclaration::BOOL)
781 opcode = (oper=='=' ? OP_LOGICAL_EQUAL : OP_LOGICAL_NOT_EQUAL);
782 else if(elem.kind==BasicTypeDeclaration::INT)
783 opcode = (oper=='=' ? OP_I_EQUAL : OP_I_NOT_EQUAL);
784 else if(elem.kind==BasicTypeDeclaration::FLOAT)
785 opcode = (oper=='=' ? OP_F_ORD_EQUAL : OP_F_ORD_NOT_EQUAL);
787 if(opcode!=OP_NOP && basic_left.base_type)
789 /* The SPIR-V equality operations produce component-wise results, but
790 GLSL operators return a single boolean. Use the any/all operations to
791 combine the results. */
792 Opcode combine_op = (oper=='!' ? OP_ANY : OP_ALL);
793 unsigned n_elems = basic_left.size&0xFFFF;
794 Id bool_vec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, n_elems);
797 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
798 compare_id = write_expression(opcode, bool_vec_type_id, left_id, right_id);
799 else if(basic_left.kind==BasicTypeDeclaration::MATRIX)
801 Id column_type_id = get_id(*basic_left.base_type);
803 write_deconstruct(column_type_id, left_id, column_ids, n_elems);
804 write_deconstruct(column_type_id, right_id, column_ids+4, n_elems);
806 Id column_bvec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, basic_left.size>>16);
807 for(unsigned i=0; i<n_elems; ++i)
809 compare_id = write_expression(opcode, column_bvec_type_id, column_ids[i], column_ids[4+i]);
810 column_ids[i] = write_expression(combine_op, result_type_id, compare_id);;
813 compare_id = write_construct(bool_vec_type_id, column_ids, n_elems);
817 r_expression_result_id = write_expression(combine_op, result_type_id, compare_id);
821 else if(oper2=='&' && elem.kind==BasicTypeDeclaration::BOOL)
822 opcode = OP_LOGICAL_AND;
823 else if(oper2=='|' && elem.kind==BasicTypeDeclaration::BOOL)
824 opcode = OP_LOGICAL_OR;
825 else if(oper2=='^' && elem.kind==BasicTypeDeclaration::BOOL)
826 opcode = OP_LOGICAL_NOT_EQUAL;
827 else if(oper=='&' && elem.kind==BasicTypeDeclaration::INT)
828 opcode = OP_BITWISE_AND;
829 else if(oper=='|' && elem.kind==BasicTypeDeclaration::INT)
830 opcode = OP_BITWISE_OR;
831 else if(oper=='^' && elem.kind==BasicTypeDeclaration::INT)
832 opcode = OP_BITWISE_XOR;
833 else if(oper=='<' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
834 opcode = OP_SHIFT_LEFT_LOGICAL;
835 else if(oper=='>' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
836 opcode = OP_SHIFT_RIGHT_ARITHMETIC;
837 else if(oper=='%' && elem.kind==BasicTypeDeclaration::INT)
839 else if(oper=='+' || oper=='-' || oper=='*' || oper=='/')
841 Opcode elem_op = OP_NOP;
842 if(elem.kind==BasicTypeDeclaration::INT)
843 elem_op = (oper=='+' ? OP_I_ADD : oper=='-' ? OP_I_SUB : oper=='*' ? OP_I_MUL : OP_S_DIV);
844 else if(elem.kind==BasicTypeDeclaration::FLOAT)
845 elem_op = (oper=='+' ? OP_F_ADD : oper=='-' ? OP_F_SUB : oper=='*' ? OP_F_MUL : OP_F_DIV);
847 if(oper=='*' && (basic_left.base_type || basic_right.base_type) && elem.kind==BasicTypeDeclaration::FLOAT)
849 /* Multiplication between floating-point vectors and matrices has
850 dedicated operations. */
851 if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
852 opcode = OP_MATRIX_TIMES_MATRIX;
853 else if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
855 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
856 opcode = OP_VECTOR_TIMES_MATRIX;
857 else if(basic_right.kind==BasicTypeDeclaration::VECTOR)
858 opcode = OP_MATRIX_TIMES_VECTOR;
861 opcode = OP_MATRIX_TIMES_SCALAR;
862 swap_operands = (basic_right.kind==BasicTypeDeclaration::MATRIX);
865 else if(basic_left.kind==BasicTypeDeclaration::VECTOR && basic_right.kind==BasicTypeDeclaration::VECTOR)
869 opcode = OP_VECTOR_TIMES_SCALAR;
870 swap_operands = (basic_right.kind==BasicTypeDeclaration::VECTOR);
873 else if((basic_left.base_type!=0)!=(basic_right.base_type!=0))
875 /* One operand is scalar and the other is a vector or a matrix.
876 Expand the scalar to a vector of appropriate size. */
877 Id &scalar_id = (basic_left.base_type ? right_id : left_id);
878 BasicTypeDeclaration *vector_type = (basic_left.base_type ? &basic_left : &basic_right);
879 if(vector_type->kind==BasicTypeDeclaration::MATRIX)
880 vector_type = dynamic_cast<BasicTypeDeclaration *>(vector_type->base_type);
881 Id vector_type_id = get_id(*vector_type);
883 Id expanded_id = begin_expression(OP_COMPOSITE_CONSTRUCT, vector_type_id, vector_type->size);
884 for(unsigned i=0; i<vector_type->size; ++i)
885 writer.write(scalar_id);
886 end_expression(OP_COMPOSITE_CONSTRUCT);
888 scalar_id = expanded_id;
890 if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
892 // Apply matrix operation column-wise.
893 Id matrix_id = (basic_left.base_type ? left_id : right_id);
896 unsigned n_columns = (basic_left.base_type ? basic_left.size : basic_right.size)&0xFFFF;
897 write_deconstruct(vector_type_id, matrix_id, column_ids, n_columns);
899 for(unsigned i=0; i<n_columns; ++i)
900 column_ids[i] = write_expression(elem_op, vector_type_id, column_ids[i], expanded_id);
902 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
908 else if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
911 throw internal_error("non-float matrix multiplication");
913 /* Other operations involving matrices need to be performed
915 Id column_type_id = get_id(*basic_left.base_type);
918 unsigned n_columns = basic_left.size&0xFFFF;
919 write_deconstruct(column_type_id, left_id, column_ids, n_columns);
920 write_deconstruct(column_type_id, right_id, column_ids+4, n_columns);
922 for(unsigned i=0; i<n_columns; ++i)
923 column_ids[i] = write_expression(elem_op, column_type_id, column_ids[i], column_ids[4+i]);
925 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
928 else if(basic_left.kind==basic_right.kind)
929 // Both operands are either scalars or vectors.
934 throw internal_error("unknown binary operator");
937 swap(left_id, right_id);
939 r_expression_result_id = write_expression(opcode, result_type_id, left_id, right_id);
942 void SpirVGenerator::visit(Assignment &assign)
944 if(assign.oper->token[0]!='=')
945 visit(static_cast<BinaryExpression &>(assign));
947 assign.right->visit(*this);
949 SetForScope<Id> set_assign(assignment_source_id, r_expression_result_id);
950 assign.left->visit(*this);
951 r_constant_result = false;
954 void SpirVGenerator::visit(TernaryExpression &ternary)
956 if(constant_expression)
958 ternary.condition->visit(*this);
959 Id condition_id = r_expression_result_id;
960 ternary.true_expr->visit(*this);
961 Id true_result_id = r_expression_result_id;
962 ternary.false_expr->visit(*this);
963 Id false_result_id = r_expression_result_id;
965 r_expression_result_id = begin_expression(OP_SELECT, get_id(*ternary.type), 3);
966 writer.write(condition_id);
967 writer.write(true_result_id);
968 writer.write(false_result_id);
969 end_expression(OP_SELECT);
974 ternary.condition->visit(*this);
975 Id condition_id = r_expression_result_id;
977 Id true_label_id = next_id++;
978 Id false_label_id = next_id++;
979 Id merge_block_id = next_id++;
980 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
981 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, condition_id, true_label_id, false_label_id);
983 writer.write_op_label(true_label_id);
984 ternary.true_expr->visit(*this);
985 Id true_result_id = r_expression_result_id;
986 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
988 writer.write_op_label(false_label_id);
989 ternary.false_expr->visit(*this);
990 Id false_result_id = r_expression_result_id;
992 writer.write_op_label(merge_block_id);
993 r_expression_result_id = begin_expression(OP_PHI, get_id(*ternary.type), 4);
994 writer.write(true_result_id);
995 writer.write(true_label_id);
996 writer.write(false_result_id);
997 writer.write(false_label_id);
998 end_expression(OP_PHI);
1000 r_constant_result = false;
1003 void SpirVGenerator::visit(FunctionCall &call)
1005 if(assignment_source_id)
1006 throw internal_error("assignment to function call");
1007 else if(composite_access)
1008 return visit_isolated(call);
1009 else if(call.constructor && call.arguments.size()==1 && call.arguments[0]->type==call.type)
1010 return call.arguments[0]->visit(*this);
1012 vector<Id> argument_ids;
1013 argument_ids.reserve(call.arguments.size());
1014 bool all_args_const = true;
1015 for(NodeArray<Expression>::const_iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1018 argument_ids.push_back(r_expression_result_id);
1019 all_args_const &= r_constant_result;
1022 if(constant_expression && (!call.constructor || !all_args_const))
1023 throw internal_error("function call in constant expression");
1025 Id result_type_id = get_id(*call.type);
1027 if(call.constructor)
1028 visit_constructor(call, argument_ids, all_args_const);
1029 else if(call.declaration->source==BUILTIN_SOURCE)
1032 for(NodeArray<Expression>::const_iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1033 if(BasicTypeDeclaration *basic_arg = dynamic_cast<BasicTypeDeclaration *>((*i)->type))
1035 BasicTypeDeclaration &elem_arg = *get_element_type(*basic_arg);
1036 switch(elem_arg.kind)
1038 case BasicTypeDeclaration::BOOL: arg_types += 'b'; break;
1039 case BasicTypeDeclaration::INT: arg_types += 'i'; break;
1040 case BasicTypeDeclaration::FLOAT: arg_types += 'f'; break;
1041 default: arg_types += '?';
1045 const BuiltinFunctionInfo *builtin_info;
1046 for(builtin_info=builtin_functions; builtin_info->function[0]; ++builtin_info)
1047 if(builtin_info->function==call.name && (!builtin_info->arg_types[0] || builtin_info->arg_types==arg_types))
1050 if(builtin_info->opcode)
1053 if(builtin_info->extension[0])
1055 opcode = OP_EXT_INST;
1056 Id ext_id = import_extension(builtin_info->extension);
1058 r_expression_result_id = begin_expression(opcode, result_type_id);
1059 writer.write(ext_id);
1060 writer.write(builtin_info->opcode);
1064 opcode = static_cast<Opcode>(builtin_info->opcode);
1065 r_expression_result_id = begin_expression(opcode, result_type_id);
1068 for(unsigned i=0; i<call.arguments.size(); ++i)
1070 if(!builtin_info->arg_order[i] || builtin_info->arg_order[i]>argument_ids.size())
1071 throw internal_error("invalid builtin function info");
1072 writer.write(argument_ids[builtin_info->arg_order[i]-1]);
1075 end_expression(opcode);
1077 else if(builtin_info->handler)
1078 (this->*(builtin_info->handler))(call, argument_ids);
1080 throw internal_error("unknown builtin function "+call.name);
1084 r_expression_result_id = begin_expression(OP_FUNCTION_CALL, result_type_id, 1+call.arguments.size());
1085 writer.write(get_id(*call.declaration->definition));
1086 for(vector<Id>::const_iterator i=argument_ids.begin(); i!=argument_ids.end(); ++i)
1088 end_expression(OP_FUNCTION_CALL);
1090 // Any global variables the called function uses might have changed value
1091 set<Node *> dependencies = DependencyCollector().apply(*call.declaration->definition);
1092 for(set<Node *>::const_iterator i=dependencies.begin(); i!=dependencies.end(); ++i)
1093 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(*i))
1094 variable_load_ids.erase(var);
1098 void SpirVGenerator::visit_constructor(FunctionCall &call, const vector<Id> &argument_ids, bool all_args_const)
1100 Id result_type_id = get_id(*call.type);
1102 BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(call.type);
1105 if(dynamic_cast<const StructDeclaration *>(call.type))
1106 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1108 throw internal_error("unconstructable type "+call.name);
1112 SetFlag set_const(constant_expression, constant_expression || all_args_const);
1114 BasicTypeDeclaration &elem = *get_element_type(*basic);
1115 BasicTypeDeclaration &basic_arg0 = dynamic_cast<BasicTypeDeclaration &>(*call.arguments[0]->type);
1116 BasicTypeDeclaration &elem_arg0 = *get_element_type(basic_arg0);
1118 if(basic->kind==BasicTypeDeclaration::MATRIX)
1120 Id col_type_id = get_id(*basic->base_type);
1121 unsigned n_columns = basic->size&0xFFFF;
1122 unsigned n_rows = basic->size>>16;
1125 if(call.arguments.size()==1)
1127 // Construct diagonal matrix from a single scalar.
1128 Id zero_id = get_constant_id(get_id(elem), 0.0f);
1129 for(unsigned i=0; i<n_columns; ++i)
1131 column_ids[i] = begin_expression(OP_COMPOSITE_CONSTRUCT, col_type_id, n_rows);;
1132 for(unsigned j=0; j<n_rows; ++j)
1133 writer.write(j==i ? argument_ids[0] : zero_id);
1134 end_expression(OP_COMPOSITE_CONSTRUCT);
1138 // Construct a matrix from column vectors
1139 copy(argument_ids.begin(), argument_ids.begin()+n_columns, column_ids);
1141 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
1143 else if(basic->kind==BasicTypeDeclaration::VECTOR && (call.arguments.size()>1 || basic_arg0.kind!=BasicTypeDeclaration::VECTOR))
1145 /* There's either a single scalar argument or multiple arguments
1146 which make up the vector's components. */
1147 if(call.arguments.size()==1)
1149 r_expression_result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, result_type_id);
1150 for(unsigned i=0; i<basic->size; ++i)
1151 writer.write(argument_ids[0]);
1152 end_expression(OP_COMPOSITE_CONSTRUCT);
1155 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1157 else if(elem.kind==BasicTypeDeclaration::BOOL)
1159 if(constant_expression)
1160 throw internal_error("unconverted constant");
1162 // Conversion to boolean is implemented as comparing against zero.
1163 Id number_type_id = get_id(elem_arg0);
1164 Id zero_id = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ?
1165 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1166 if(basic_arg0.kind==BasicTypeDeclaration::VECTOR)
1167 zero_id = get_vector_constant_id(get_id(basic_arg0), basic_arg0.size, zero_id);
1169 Opcode opcode = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ? OP_F_ORD_NOT_EQUAL : OP_I_NOT_EQUAL);
1170 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0], zero_id);
1172 else if(elem_arg0.kind==BasicTypeDeclaration::BOOL)
1174 if(constant_expression)
1175 throw internal_error("unconverted constant");
1177 /* Conversion from boolean is implemented as selecting from zero
1179 Id number_type_id = get_id(elem);
1180 Id zero_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1181 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1182 Id one_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1183 get_constant_id(number_type_id, 1.0f) : get_constant_id(number_type_id, 1));
1184 if(basic->kind==BasicTypeDeclaration::VECTOR)
1186 zero_id = get_vector_constant_id(get_id(*basic), basic->size, zero_id);
1187 one_id = get_vector_constant_id(get_id(*basic), basic->size, one_id);
1190 r_expression_result_id = begin_expression(OP_SELECT, result_type_id, 3);
1191 writer.write(argument_ids[0]);
1192 writer.write(zero_id);
1193 writer.write(one_id);
1194 end_expression(OP_SELECT);
1198 if(constant_expression)
1199 throw internal_error("unconverted constant");
1201 // Scalar or vector conversion between types of equal size.
1203 if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::FLOAT)
1204 opcode = OP_CONVERT_F_TO_S;
1205 else if(elem.kind==BasicTypeDeclaration::FLOAT && elem_arg0.kind==BasicTypeDeclaration::INT)
1206 opcode = OP_CONVERT_S_TO_F;
1208 throw internal_error("invalid conversion");
1210 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0]);
1214 void SpirVGenerator::visit_builtin_matrix_comp_mult(FunctionCall &call, const vector<Id> &argument_ids)
1216 if(argument_ids.size()!=2)
1217 throw internal_error("invalid matrixCompMult call");
1219 const BasicTypeDeclaration &basic_arg0 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[0]->type);
1220 Id column_type_id = get_id(*basic_arg0.base_type);
1223 unsigned n_columns = basic_arg0.size&0xFFFF;
1224 write_deconstruct(column_type_id, argument_ids[0], column_ids, n_columns);
1225 write_deconstruct(column_type_id, argument_ids[1], column_ids+4, n_columns);
1227 for(unsigned i=0; i<n_columns; ++i)
1228 column_ids[i] = write_expression(OP_F_MUL, column_type_id, column_ids[i], column_ids[4+i]);
1230 r_expression_result_id = write_construct(get_id(*call.type), column_ids, n_columns);
1233 void SpirVGenerator::visit_builtin_texture(FunctionCall &call, const vector<Id> &argument_ids)
1235 if(argument_ids.size()<2)
1236 throw internal_error("invalid texture sampling call");
1238 bool explicit_lod = (stage->type!=Stage::FRAGMENT || call.name=="textureLod");
1239 Id lod_id = (!explicit_lod ? 0 : call.name=="textureLod" ? argument_ids.back() :
1240 get_constant_id(get_standard_type_id(BasicTypeDeclaration::FLOAT, 1), 0.0f));
1242 const ImageTypeDeclaration &image = dynamic_cast<const ImageTypeDeclaration &>(*call.arguments[0]->type);
1245 Id result_type_id = get_id(*call.type);
1249 if(argument_ids.size()==2)
1251 const BasicTypeDeclaration &basic_arg1 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[1]->type);
1252 dref_id = begin_expression(OP_COMPOSITE_EXTRACT, get_id(*basic_arg1.base_type), 2);
1253 writer.write(argument_ids.back());
1254 writer.write(basic_arg1.size-1);
1255 end_expression(OP_COMPOSITE_EXTRACT);
1258 dref_id = argument_ids[2];
1260 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_DREF_EXPLICIT_LOD : OP_IMAGE_SAMPLE_DREF_IMPLICIT_LOD);
1261 r_expression_result_id = begin_expression(opcode, result_type_id, 3+explicit_lod*2);
1265 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_EXPLICIT_LOD : OP_IMAGE_SAMPLE_IMPLICIT_LOD);
1266 r_expression_result_id = begin_expression(opcode, result_type_id, 2+explicit_lod*2);
1269 for(unsigned i=0; i<2; ++i)
1270 writer.write(argument_ids[i]);
1272 writer.write(dref_id);
1275 writer.write(2); // Lod
1276 writer.write(lod_id);
1279 end_expression(opcode);
1282 void SpirVGenerator::visit_builtin_texel_fetch(FunctionCall &call, const vector<Id> &argument_ids)
1284 if(argument_ids.size()!=3)
1285 throw internal_error("invalid texelFetch call");
1287 r_expression_result_id = begin_expression(OP_IMAGE_FETCH, get_id(*call.type), 4);
1288 for(unsigned i=0; i<2; ++i)
1289 writer.write(argument_ids[i]);
1290 writer.write(2); // Lod
1291 writer.write(argument_ids.back());
1292 end_expression(OP_IMAGE_FETCH);
1295 void SpirVGenerator::visit_builtin_interpolate(FunctionCall &call, const vector<Id> &argument_ids)
1297 if(argument_ids.size()<1)
1298 throw internal_error("invalid interpolate call");
1299 const VariableReference *var = dynamic_cast<const VariableReference *>(call.arguments[0].get());
1300 if(!var || !var->declaration || var->declaration->interface!="in")
1301 throw internal_error("invalid interpolate call");
1303 SpirVGlslStd450Opcode opcode;
1304 if(call.name=="interpolateAtCentroid")
1305 opcode = GLSL450_INTERPOLATE_AT_CENTROID;
1306 else if(call.name=="interpolateAtSample")
1307 opcode = GLSL450_INTERPOLATE_AT_SAMPLE;
1308 else if(call.name=="interpolateAtOffset")
1309 opcode = GLSL450_INTERPOLATE_AT_OFFSET;
1311 throw internal_error("invalid interpolate call");
1313 use_capability(CAP_INTERPOLATION_FUNCTION);
1315 Id ext_id = import_extension("GLSL.std.450");
1316 r_expression_result_id = begin_expression(OP_EXT_INST, get_id(*call.type));
1317 writer.write(ext_id);
1318 writer.write(opcode);
1319 writer.write(get_id(*var->declaration));
1320 for(vector<Id>::const_iterator i=argument_ids.begin(); ++i!=argument_ids.end(); )
1322 end_expression(OP_EXT_INST);
1325 void SpirVGenerator::visit(ExpressionStatement &expr)
1327 expr.expression->visit(*this);
1330 void SpirVGenerator::visit(InterfaceLayout &layout)
1332 interface_layouts.push_back(&layout);
1335 bool SpirVGenerator::check_duplicate_type(TypeDeclaration &type)
1337 for(map<Node *, Declaration>::const_iterator i=declared_ids.begin(); i!=declared_ids.end(); ++i)
1338 if(TypeDeclaration *type2 = dynamic_cast<TypeDeclaration *>(i->first))
1339 if(TypeComparer().apply(type, *type2))
1341 insert_unique(declared_ids, &type, i->second);
1348 bool SpirVGenerator::check_standard_type(BasicTypeDeclaration &basic)
1350 const BasicTypeDeclaration *elem = (basic.kind==BasicTypeDeclaration::VECTOR ?
1351 dynamic_cast<const BasicTypeDeclaration *>(basic.base_type) : &basic);
1352 if(!elem || elem->base_type)
1354 if((elem->kind==BasicTypeDeclaration::INT || elem->kind==BasicTypeDeclaration::FLOAT) && elem->size!=32)
1357 Id standard_id = get_standard_type_id(elem->kind, (basic.kind==BasicTypeDeclaration::VECTOR ? basic.size : 1));
1358 insert_unique(declared_ids, &basic, Declaration(standard_id, 0));
1359 writer.write_op_name(standard_id, basic.name);
1364 void SpirVGenerator::visit(BasicTypeDeclaration &basic)
1366 if(check_standard_type(basic))
1368 if(check_duplicate_type(basic))
1370 // Alias types shouldn't exist at this point and arrays are handled elsewhere
1371 if(basic.kind==BasicTypeDeclaration::ALIAS || basic.kind==BasicTypeDeclaration::ARRAY)
1374 Id type_id = allocate_id(basic, 0);
1375 writer.write_op_name(type_id, basic.name);
1379 case BasicTypeDeclaration::INT:
1380 writer.write_op(content.globals, OP_TYPE_INT, type_id, basic.size, 1);
1382 case BasicTypeDeclaration::FLOAT:
1383 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, basic.size);
1385 case BasicTypeDeclaration::VECTOR:
1386 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, get_id(*basic.base_type), basic.size);
1388 case BasicTypeDeclaration::MATRIX:
1389 writer.write_op(content.globals, OP_TYPE_MATRIX, type_id, get_id(*basic.base_type), basic.size&0xFFFF);
1392 throw internal_error("unknown basic type");
1396 void SpirVGenerator::visit(ImageTypeDeclaration &image)
1398 if(check_duplicate_type(image))
1401 Id type_id = allocate_id(image, 0);
1403 Id image_id = (image.sampled ? next_id++ : type_id);
1404 writer.begin_op(content.globals, OP_TYPE_IMAGE, 9);
1405 writer.write(image_id);
1406 writer.write(get_id(*image.base_type));
1407 writer.write(image.dimensions-1);
1408 writer.write(image.shadow);
1409 writer.write(image.array);
1410 writer.write(false); // Multisample
1411 writer.write(image.sampled ? 1 : 2);
1412 writer.write(0); // Format (unknown)
1413 writer.end_op(OP_TYPE_IMAGE);
1417 writer.write_op_name(type_id, image.name);
1418 writer.write_op(content.globals, OP_TYPE_SAMPLED_IMAGE, type_id, image_id);
1421 if(image.dimensions==ImageTypeDeclaration::ONE)
1422 use_capability(image.sampled ? CAP_SAMPLED_1D : CAP_IMAGE_1D);
1423 else if(image.dimensions==ImageTypeDeclaration::CUBE && image.array)
1424 use_capability(image.sampled ? CAP_SAMPLED_CUBE_ARRAY : CAP_IMAGE_CUBE_ARRAY);
1427 void SpirVGenerator::visit(StructDeclaration &strct)
1429 if(check_duplicate_type(strct))
1432 Id type_id = allocate_id(strct, 0);
1433 writer.write_op_name(type_id, strct.name);
1435 if(strct.interface_block)
1436 writer.write_op_decorate(type_id, DECO_BLOCK);
1438 bool builtin = (strct.interface_block && !strct.interface_block->block_name.compare(0, 3, "gl_"));
1439 vector<Id> member_type_ids;
1440 member_type_ids.reserve(strct.members.body.size());
1441 for(NodeList<Statement>::const_iterator i=strct.members.body.begin(); i!=strct.members.body.end(); ++i)
1443 const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(i->get());
1447 unsigned index = member_type_ids.size();
1448 member_type_ids.push_back(get_variable_type_id(*var));
1450 writer.write_op_member_name(type_id, index, var->name);
1454 BuiltinSemantic semantic = get_builtin_semantic(var->name);
1455 writer.write_op_member_decorate(type_id, index, DECO_BUILTIN, semantic);
1461 const vector<Layout::Qualifier> &qualifiers = var->layout->qualifiers;
1462 for(vector<Layout::Qualifier>::const_iterator j=qualifiers.begin(); j!=qualifiers.end(); ++j)
1464 if(j->name=="offset")
1465 writer.write_op_member_decorate(type_id, index, DECO_OFFSET, j->value);
1466 else if(j->name=="column_major")
1467 writer.write_op_member_decorate(type_id, index, DECO_COL_MAJOR);
1468 else if(j->name=="row_major")
1469 writer.write_op_member_decorate(type_id, index, DECO_ROW_MAJOR);
1473 const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var->type_declaration);
1474 while(basic && basic->kind==BasicTypeDeclaration::ARRAY)
1475 basic = dynamic_cast<const BasicTypeDeclaration *>(basic->base_type);
1476 if(basic && basic->kind==BasicTypeDeclaration::MATRIX)
1478 unsigned stride = MemoryRequirementsCalculator().apply(*basic->base_type).stride;
1479 writer.write_op_member_decorate(type_id, index, DECO_MATRIX_STRIDE, stride);
1484 writer.begin_op(content.globals, OP_TYPE_STRUCT);
1485 writer.write(type_id);
1486 for(vector<Id>::const_iterator i=member_type_ids.begin(); i!=member_type_ids.end(); ++i)
1488 writer.end_op(OP_TYPE_STRUCT);
1491 void SpirVGenerator::visit(VariableDeclaration &var)
1493 const vector<Layout::Qualifier> *layout_ql = (var.layout ? &var.layout->qualifiers : 0);
1498 for(vector<Layout::Qualifier>::const_iterator i=layout_ql->begin(); (spec_id<0 && i!=layout_ql->end()); ++i)
1499 if(i->name=="constant_id")
1503 Id type_id = get_variable_type_id(var);
1508 if(!var.init_expression)
1509 throw internal_error("const variable without initializer");
1511 SetFlag set_const(constant_expression);
1512 SetFlag set_spec(spec_constant, spec_id>=0);
1513 r_expression_result_id = 0;
1514 var.init_expression->visit(*this);
1515 var_id = r_expression_result_id;
1516 insert_unique(declared_ids, &var, Declaration(var_id, type_id));
1517 writer.write_op_decorate(var_id, DECO_SPEC_ID, spec_id);
1519 /* It's unclear what should be done if a specialization constant is
1520 initialized with anything other than a literal. GLSL doesn't seem to
1521 prohibit that but SPIR-V says OpSpecConstantOp can't be updated via
1526 StorageClass storage = (current_function ? STORAGE_FUNCTION : get_interface_storage(var.interface, false));
1527 Id ptr_type_id = get_pointer_type_id(type_id, storage);
1528 if(var.interface=="uniform")
1530 Id &uni_id = declared_uniform_ids["v"+var.name];
1533 insert_unique(declared_ids, &var, Declaration(uni_id, ptr_type_id));
1537 uni_id = var_id = allocate_id(var, ptr_type_id);
1540 var_id = allocate_id(var, (var.constant ? type_id : ptr_type_id));
1543 if(var.init_expression)
1545 SetFlag set_const(constant_expression, !current_function);
1546 r_expression_result_id = 0;
1547 var.init_expression->visit(*this);
1548 init_id = r_expression_result_id;
1551 vector<Word> &target = (current_function ? content.locals : content.globals);
1552 writer.begin_op(target, OP_VARIABLE, 4+(init_id && !current_function));
1553 writer.write(ptr_type_id);
1554 writer.write(var_id);
1555 writer.write(storage);
1556 if(init_id && !current_function)
1557 writer.write(init_id);
1558 writer.end_op(OP_VARIABLE);
1562 for(vector<Layout::Qualifier>::const_iterator i=layout_ql->begin(); i!=layout_ql->end(); ++i)
1564 if(i->name=="location")
1565 writer.write_op_decorate(var_id, DECO_LOCATION, i->value);
1566 else if(i->name=="set")
1567 writer.write_op_decorate(var_id, DECO_DESCRIPTOR_SET, i->value);
1568 else if(i->name=="binding")
1569 writer.write_op_decorate(var_id, DECO_BINDING, i->value);
1573 if(init_id && current_function)
1574 writer.write_op(content.function_body, OP_STORE, var_id, init_id);
1577 writer.write_op_name(var_id, var.name);
1580 void SpirVGenerator::visit(InterfaceBlock &iface)
1582 StorageClass storage = get_interface_storage(iface.interface, true);
1585 type_id = get_array_type_id(*iface.struct_declaration, 0);
1587 type_id = get_id(*iface.struct_declaration);
1588 Id ptr_type_id = get_pointer_type_id(type_id, storage);
1591 if(iface.interface=="uniform")
1593 Id &uni_id = declared_uniform_ids["b"+iface.block_name];
1596 insert_unique(declared_ids, &iface, Declaration(uni_id, ptr_type_id));
1600 uni_id = block_id = allocate_id(iface, ptr_type_id);
1603 block_id = allocate_id(iface, ptr_type_id);
1604 writer.write_op_name(block_id, iface.instance_name);
1606 writer.write_op(content.globals, OP_VARIABLE, ptr_type_id, block_id, storage);
1610 const vector<Layout::Qualifier> &qualifiers = iface.layout->qualifiers;
1611 for(vector<Layout::Qualifier>::const_iterator i=qualifiers.begin(); i!=qualifiers.end(); ++i)
1612 if(i->name=="binding")
1613 writer.write_op_decorate(block_id, DECO_BINDING, i->value);
1617 void SpirVGenerator::visit_entry_point(FunctionDeclaration &func, Id func_id)
1619 writer.begin_op(content.entry_points, OP_ENTRY_POINT);
1622 case Stage::VERTEX: writer.write(0); break;
1623 case Stage::GEOMETRY: writer.write(3); break;
1624 case Stage::FRAGMENT: writer.write(4); break;
1625 default: throw internal_error("unknown stage");
1627 writer.write(func_id);
1628 writer.write_string(func.name);
1630 set<Node *> dependencies = DependencyCollector().apply(func);
1631 for(set<Node *>::const_iterator i=dependencies.begin(); i!=dependencies.end(); ++i)
1633 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(*i))
1635 if(!var->interface.empty())
1636 writer.write(get_id(**i));
1638 else if(dynamic_cast<InterfaceBlock *>(*i))
1639 writer.write(get_id(**i));
1642 writer.end_op(OP_ENTRY_POINT);
1644 if(stage->type==Stage::FRAGMENT)
1645 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_ORIGIN_LOWER_LEFT);
1646 else if(stage->type==Stage::GEOMETRY)
1647 use_capability(CAP_GEOMETRY);
1649 for(vector<const InterfaceLayout *>::const_iterator i=interface_layouts.begin(); i!=interface_layouts.end(); ++i)
1651 const vector<Layout::Qualifier> &qualifiers = (*i)->layout.qualifiers;
1652 for(vector<Layout::Qualifier>::const_iterator j=qualifiers.begin(); j!=qualifiers.end(); ++j)
1654 if(j->name=="point")
1655 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id,
1656 ((*i)->interface=="in" ? EXEC_INPUT_POINTS : EXEC_OUTPUT_POINTS));
1657 else if(j->name=="lines")
1658 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES);
1659 else if(j->name=="lines_adjacency")
1660 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES_ADJACENCY);
1661 else if(j->name=="triangles")
1662 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_TRIANGLES);
1663 else if(j->name=="triangles_adjacency")
1664 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_TRIANGLES_ADJACENCY);
1665 else if(j->name=="line_strip")
1666 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_LINE_STRIP);
1667 else if(j->name=="triangle_strip")
1668 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_TRIANGLE_STRIP);
1669 else if(j->name=="max_vertices")
1670 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_VERTICES, j->value);
1675 void SpirVGenerator::visit(FunctionDeclaration &func)
1677 if(func.source==BUILTIN_SOURCE || func.definition!=&func)
1680 Id return_type_id = get_id(*func.return_type_declaration);
1681 vector<unsigned> param_type_ids;
1682 param_type_ids.reserve(func.parameters.size());
1683 for(NodeArray<VariableDeclaration>::const_iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1684 param_type_ids.push_back(get_variable_type_id(**i));
1686 string sig_with_return = func.return_type+func.signature;
1687 Id &type_id = function_type_ids[sig_with_return];
1690 type_id = next_id++;
1691 writer.begin_op(content.globals, OP_TYPE_FUNCTION);
1692 writer.write(type_id);
1693 writer.write(return_type_id);
1694 for(vector<unsigned>::const_iterator i=param_type_ids.begin(); i!=param_type_ids.end(); ++i)
1696 writer.end_op(OP_TYPE_FUNCTION);
1698 writer.write_op_name(type_id, sig_with_return);
1701 Id func_id = allocate_id(func, type_id);
1702 writer.write_op_name(func_id, func.name+func.signature);
1704 if(func.name=="main")
1705 visit_entry_point(func, func_id);
1707 writer.begin_op(content.functions, OP_FUNCTION, 5);
1708 writer.write(return_type_id);
1709 writer.write(func_id);
1710 writer.write(0); // Function control flags (none)
1711 writer.write(type_id);
1712 writer.end_op(OP_FUNCTION);
1714 for(unsigned i=0; i<func.parameters.size(); ++i)
1716 Id param_id = allocate_id(*func.parameters[i], param_type_ids[i]);
1717 writer.write_op(content.functions, OP_FUNCTION_PARAMETER, param_type_ids[i], param_id);
1718 // TODO This is probably incorrect if the parameter is assigned to.
1719 variable_load_ids[func.parameters[i].get()] = param_id;
1722 writer.begin_function_body(next_id++);
1723 SetForScope<FunctionDeclaration *> set_func(current_function, &func);
1724 func.body.visit(*this);
1726 if(writer.has_current_block())
1729 writer.write_op(content.function_body, OP_UNREACHABLE);
1732 const BasicTypeDeclaration *basic_return = dynamic_cast<const BasicTypeDeclaration *>(func.return_type_declaration);
1733 if(basic_return && basic_return->kind==BasicTypeDeclaration::VOID)
1734 writer.write_op(content.function_body, OP_RETURN);
1736 throw internal_error("missing return in non-void function");
1739 writer.end_function_body();
1740 variable_load_ids.clear();
1743 void SpirVGenerator::visit(Conditional &cond)
1745 cond.condition->visit(*this);
1747 Id true_label_id = next_id++;
1748 Id merge_block_id = next_id++;
1749 Id false_label_id = (cond.else_body.body.empty() ? merge_block_id : next_id++);
1750 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1751 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, true_label_id, false_label_id);
1753 writer.write_op_label(true_label_id);
1754 cond.body.visit(*this);
1755 if(writer.has_current_block())
1756 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1758 bool reachable_if_true = reachable;
1761 if(!cond.else_body.body.empty())
1763 writer.write_op_label(false_label_id);
1764 cond.else_body.visit(*this);
1765 reachable |= reachable_if_true;
1768 writer.write_op_label(merge_block_id);
1769 prune_loads(true_label_id);
1772 void SpirVGenerator::visit(Iteration &iter)
1774 if(iter.init_statement)
1775 iter.init_statement->visit(*this);
1777 Id header_id = next_id++;
1778 Id continue_id = next_id++;
1779 Id merge_block_id = next_id++;
1781 SetForScope<Id> set_merge(loop_merge_block_id, merge_block_id);
1782 SetForScope<Id> set_continue(loop_continue_target_id, continue_id);
1784 writer.write_op_label(header_id);
1785 writer.write_op(content.function_body, OP_LOOP_MERGE, merge_block_id, continue_id, 0); // Loop control (none)
1787 Id body_id = next_id++;
1790 writer.write_op_label(next_id++);
1791 iter.condition->visit(*this);
1792 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, body_id, merge_block_id);
1795 writer.write_op_label(body_id);
1796 iter.body.visit(*this);
1798 writer.write_op_label(continue_id);
1799 if(iter.loop_expression)
1800 iter.loop_expression->visit(*this);
1801 writer.write_op(content.function_body, OP_BRANCH, header_id);
1803 writer.write_op_label(merge_block_id);
1804 prune_loads(header_id);
1808 void SpirVGenerator::visit(Return &ret)
1812 ret.expression->visit(*this);
1813 writer.write_op(content.function_body, OP_RETURN_VALUE, r_expression_result_id);
1816 writer.write_op(content.function_body, OP_RETURN);
1820 void SpirVGenerator::visit(Jump &jump)
1822 if(jump.keyword=="discard")
1823 writer.write_op(content.function_body, OP_KILL);
1824 else if(jump.keyword=="break")
1825 writer.write_op(content.function_body, OP_BRANCH, loop_merge_block_id);
1826 else if(jump.keyword=="continue")
1827 writer.write_op(content.function_body, OP_BRANCH, loop_continue_target_id);
1829 throw internal_error("unknown jump");
1834 bool SpirVGenerator::TypeKey::operator<(const TypeKey &other) const
1836 if(type_id!=other.type_id)
1837 return type_id<other.type_id;
1838 return detail<other.detail;
1842 bool SpirVGenerator::ConstantKey::operator<(const ConstantKey &other) const
1844 if(type_id!=other.type_id)
1845 return type_id<other.type_id;
1846 return int_value<other.int_value;