1 #include <msp/core/algorithm.h>
2 #include <msp/core/maputils.h>
3 #include <msp/core/raii.h>
13 const SpirVGenerator::BuiltinFunctionInfo SpirVGenerator::builtin_functions[] =
15 { "radians", "f", "GLSL.std.450", GLSL450_RADIANS, { 1 }, 0, 0 },
16 { "degrees", "f", "GLSL.std.450", GLSL450_DEGREES, { 1 }, 0, 0 },
17 { "sin", "f", "GLSL.std.450", GLSL450_SIN, { 1 }, 0, 0 },
18 { "cos", "f", "GLSL.std.450", GLSL450_COS, { 1 }, 0, 0 },
19 { "tan", "f", "GLSL.std.450", GLSL450_TAN, { 1 }, 0, 0 },
20 { "asin", "f", "GLSL.std.450", GLSL450_ASIN, { 1 }, 0, 0 },
21 { "acos", "f", "GLSL.std.450", GLSL450_ACOS, { 1 }, 0, 0 },
22 { "atan", "f", "GLSL.std.450", GLSL450_ATAN, { 1 }, 0, 0 },
23 { "atan", "ff", "GLSL.std.450", GLSL450_ATAN2, { 1, 2 }, 0, 0 },
24 { "sinh", "f", "GLSL.std.450", GLSL450_SINH, { 1 }, 0, 0 },
25 { "cosh", "f", "GLSL.std.450", GLSL450_COSH, { 1 }, 0, 0 },
26 { "tanh", "f", "GLSL.std.450", GLSL450_TANH, { 1 }, 0, 0 },
27 { "asinh", "f", "GLSL.std.450", GLSL450_ASINH, { 1 }, 0, 0 },
28 { "acosh", "f", "GLSL.std.450", GLSL450_ACOSH, { 1 }, 0, 0 },
29 { "atanh", "f", "GLSL.std.450", GLSL450_ATANH, { 1 }, 0, 0 },
30 { "pow", "ff", "GLSL.std.450", GLSL450_POW, { 1, 2 }, 0, 0 },
31 { "exp", "f", "GLSL.std.450", GLSL450_EXP, { 1 }, 0, 0 },
32 { "log", "f", "GLSL.std.450", GLSL450_LOG, { 1 }, 0, 0 },
33 { "exp2", "f", "GLSL.std.450", GLSL450_EXP2, { 1 }, 0, 0 },
34 { "log2", "f", "GLSL.std.450", GLSL450_LOG2, { 1 }, 0, 0 },
35 { "sqrt", "f", "GLSL.std.450", GLSL450_SQRT, { 1 }, 0, 0 },
36 { "inversesqrt", "f", "GLSL.std.450", GLSL450_INVERSE_SQRT, { 1 }, 0, 0 },
37 { "abs", "f", "GLSL.std.450", GLSL450_F_ABS, { 1 }, 0, 0 },
38 { "abs", "i", "GLSL.std.450", GLSL450_S_ABS, { 1 }, 0, 0 },
39 { "sign", "f", "GLSL.std.450", GLSL450_F_SIGN, { 1 }, 0, 0 },
40 { "sign", "i", "GLSL.std.450", GLSL450_S_SIGN, { 1 }, 0, 0 },
41 { "floor", "f", "GLSL.std.450", GLSL450_FLOOR, { 1 }, 0, 0 },
42 { "trunc", "f", "GLSL.std.450", GLSL450_TRUNC, { 1 }, 0, 0 },
43 { "round", "f", "GLSL.std.450", GLSL450_ROUND, { 1 }, 0, 0 },
44 { "roundEven", "f", "GLSL.std.450", GLSL450_ROUND_EVEN, { 1 }, 0, 0 },
45 { "ceil", "f", "GLSL.std.450", GLSL450_CEIL, { 1 }, 0, 0 },
46 { "fract", "f", "GLSL.std.450", GLSL450_FRACT, { 1 }, 0, 0 },
47 { "mod", "f", "", OP_F_MOD, { 1, 2 }, 0, 0 },
48 { "min", "ff", "GLSL.std.450", GLSL450_F_MIN, { 1, 2 }, 0, 0 },
49 { "min", "ii", "GLSL.std.450", GLSL450_S_MIN, { 1, 2 }, 0, 0 },
50 { "min", "uu", "GLSL.std.450", GLSL450_U_MIN, { 1, 2 }, 0, 0 },
51 { "max", "ff", "GLSL.std.450", GLSL450_F_MAX, { 1, 2 }, 0, 0 },
52 { "max", "ii", "GLSL.std.450", GLSL450_S_MAX, { 1, 2 }, 0, 0 },
53 { "max", "uu", "GLSL.std.450", GLSL450_U_MAX, { 1, 2 }, 0, 0 },
54 { "clamp", "fff", "GLSL.std.450", GLSL450_F_CLAMP, { 1, 2, 3 }, 0, 0 },
55 { "clamp", "iii", "GLSL.std.450", GLSL450_S_CLAMP, { 1, 2, 3 }, 0, 0 },
56 { "clamp", "uuu", "GLSL.std.450", GLSL450_U_CLAMP, { 1, 2, 3 }, 0, 0 },
57 { "mix", "fff", "GLSL.std.450", GLSL450_F_MIX, { 1, 2, 3 }, 0, 0 },
58 { "mix", "ffb", "", OP_SELECT, { 3, 2, 1 }, 0, 0 },
59 { "mix", "iib", "", OP_SELECT, { 3, 2, 1 }, 0, 0 },
60 { "mix", "uub", "", OP_SELECT, { 3, 2, 1 }, 0, 0 },
61 { "step", "ff", "GLSL.std.450", GLSL450_F_STEP, { 1, 2 }, 0, 0 },
62 { "smoothstep", "fff", "GLSL.std.450", GLSL450_F_SMOOTH_STEP, { 1, 2, 3 }, 0, 0 },
63 { "isnan", "f", "", OP_IS_NAN, { 1 }, 0, 0 },
64 { "isinf", "f", "", OP_IS_INF, { 1 }, 0, 0 },
65 { "fma", "fff", "GLSL.std.450", GLSL450_F_FMA, { 1, 2, 3 }, 0, 0 },
66 { "length", "f", "GLSL.std.450", GLSL450_LENGTH, { 1 }, 0, 0 },
67 { "distance", "ff", "GLSL.std.450", GLSL450_DISTANCE, { 1, 2 }, 0, 0 },
68 { "dot", "ff", "", OP_DOT, { 1, 2 }, 0, 0 },
69 { "cross", "ff", "GLSL.std.450", GLSL450_CROSS, { 1, 2 }, 0, 0 },
70 { "normalize", "f", "GLSL.std.450", GLSL450_NORMALIZE, { 1 }, 0, 0 },
71 { "faceforward", "fff", "GLSL.std.450", GLSL450_FACE_FORWARD, { 1, 2, 3 }, 0, 0 },
72 { "reflect", "ff", "GLSL.std.450", GLSL450_REFLECT, { 1, 2 }, 0, 0 },
73 { "refract", "fff", "GLSL.std.450", GLSL450_REFRACT, { 1, 2, 3 }, 0, 0 },
74 { "matrixCompMult", "ff", "", 0, { 0 }, 0, &SpirVGenerator::visit_builtin_matrix_comp_mult },
75 { "outerProduct", "ff", "", OP_OUTER_PRODUCT, { 1, 2 }, 0, 0 },
76 { "transpose", "f", "", OP_TRANSPOSE, { 1 }, 0, 0 },
77 { "determinant", "f", "GLSL.std.450", GLSL450_DETERMINANT, { 1 }, 0, 0 },
78 { "inverse", "f", "GLSL.std.450", GLSL450_MATRIX_INVERSE, { 1 }, 0, 0 },
79 { "lessThan", "ff", "", OP_F_ORD_LESS_THAN, { 1, 2 }, 0, 0 },
80 { "lessThan", "ii", "", OP_S_LESS_THAN, { 1, 2 }, 0, 0 },
81 { "lessThan", "uu", "", OP_U_LESS_THAN, { 1, 2 }, 0, 0 },
82 { "lessThanEqual", "ff", "", OP_F_ORD_LESS_THAN_EQUAL, { 1, 2 }, 0, 0 },
83 { "lessThanEqual", "ii", "", OP_S_LESS_THAN_EQUAL, { 1, 2 }, 0, 0 },
84 { "lessThanEqual", "uu", "", OP_U_LESS_THAN_EQUAL, { 1, 2 }, 0, 0 },
85 { "greaterThan", "ff", "", OP_F_ORD_GREATER_THAN, { 1, 2 }, 0, 0 },
86 { "greaterThan", "ii", "", OP_S_GREATER_THAN, { 1, 2 }, 0, 0 },
87 { "greaterThan", "uu", "", OP_U_GREATER_THAN, { 1, 2 }, 0, 0 },
88 { "greaterThanEqual", "ff", "", OP_F_ORD_GREATER_THAN_EQUAL, { 1, 2 }, 0, 0 },
89 { "greaterThanEqual", "ii", "", OP_S_GREATER_THAN_EQUAL, { 1, 2 }, 0, 0 },
90 { "greaterThanEqual", "uu", "", OP_U_GREATER_THAN_EQUAL, { 1, 2 }, 0, 0 },
91 { "equal", "ff", "", OP_F_ORD_EQUAL, { 1, 2 }, 0, 0 },
92 { "equal", "ii", "", OP_I_EQUAL, { 1, 2 }, 0, 0 },
93 { "equal", "uu", "", OP_I_EQUAL, { 1, 2 }, 0, 0 },
94 { "notEqual", "ff", "", OP_F_ORD_NOT_EQUAL, { 1, 2 }, 0, 0 },
95 { "notEqual", "ii", "", OP_I_NOT_EQUAL, { 1, 2 }, 0, 0 },
96 { "notEqual", "uu", "", OP_I_NOT_EQUAL, { 1, 2 }, 0, 0 },
97 { "any", "b", "", OP_ANY, { 1 }, 0, 0 },
98 { "all", "b", "", OP_ALL, { 1 }, 0, 0 },
99 { "not", "b", "", OP_LOGICAL_NOT, { 1 }, 0, 0 },
100 { "bitfieldExtract", "iii", "", OP_BIT_FIELD_S_EXTRACT, { 1, 2, 3 }, 0, 0 },
101 { "bitfieldExtract", "uii", "", OP_BIT_FIELD_U_EXTRACT, { 1, 2, 3 }, 0, 0 },
102 { "bitfieldInsert", "iiii", "", OP_BIT_FIELD_INSERT, { 1, 2, 3, 4 }, 0, 0 },
103 { "bitfieldInsert", "uuii", "", OP_BIT_FIELD_INSERT, { 1, 2, 3, 4 }, 0, 0 },
104 { "bitfieldReverse", "i", "", OP_BIT_REVERSE, { 1 }, 0, 0 },
105 { "bitfieldReverse", "u", "", OP_BIT_REVERSE, { 1 }, 0, 0 },
106 { "bitCount", "i", "", OP_BIT_COUNT, { 1 }, 0, 0 },
107 { "findLSB", "i", "GLSL.std.450", GLSL450_FIND_I_LSB, { 1 }, 0, 0 },
108 { "findLSB", "u", "GLSL.std.450", GLSL450_FIND_I_LSB, { 1 }, 0, 0 },
109 { "findMSB", "i", "GLSL.std.450", GLSL450_FIND_S_MSB, { 1 }, 0, 0 },
110 { "findMSB", "u", "GLSL.std.450", GLSL450_FIND_U_MSB, { 1 }, 0, 0 },
111 { "textureSize", "", "", 0, { }, CAP_IMAGE_QUERY, &SpirVGenerator::visit_builtin_texture_query },
112 { "textureQueryLod", "", "", 0, { }, CAP_IMAGE_QUERY, &SpirVGenerator::visit_builtin_texture_query },
113 { "textureQueryLevels", "", "", 0, { }, CAP_IMAGE_QUERY, &SpirVGenerator::visit_builtin_texture_query },
114 { "texture", "", "", 0, { }, 0, &SpirVGenerator::visit_builtin_texture },
115 { "textureLod", "", "", 0, { }, 0, &SpirVGenerator::visit_builtin_texture },
116 { "texelFetch", "", "", 0, { }, 0, &SpirVGenerator::visit_builtin_texel_fetch },
117 { "EmitVertex", "", "", OP_EMIT_VERTEX, { }, 0, 0 },
118 { "EndPrimitive", "", "", OP_END_PRIMITIVE, { }, 0, 0 },
119 { "dFdx", "f", "", OP_DP_DX, { 1 }, 0, 0 },
120 { "dFdy", "f", "", OP_DP_DY, { 1 }, 0, 0 },
121 { "dFdxFine", "f", "", OP_DP_DX_FINE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
122 { "dFdyFine", "f", "", OP_DP_DY_FINE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
123 { "dFdxCoarse", "f", "", OP_DP_DX_COARSE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
124 { "dFdyCoarse", "f", "", OP_DP_DY_COARSE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
125 { "fwidth", "f", "", OP_FWIDTH, { 1 }, 0, 0 },
126 { "fwidthFine", "f", "", OP_FWIDTH_FINE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
127 { "fwidthCoarse", "f", "", OP_FWIDTH_COARSE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
128 { "interpolateAtCentroid", "", "", 0, { }, CAP_INTERPOLATION_FUNCTION, &SpirVGenerator::visit_builtin_interpolate },
129 { "interpolateAtSample", "", "", 0, { }, CAP_INTERPOLATION_FUNCTION, &SpirVGenerator::visit_builtin_interpolate },
130 { "interpolateAtOffset", "", "", 0, { }, CAP_INTERPOLATION_FUNCTION, &SpirVGenerator::visit_builtin_interpolate },
131 { "", "", "", 0, { }, 0, 0 }
134 SpirVGenerator::SpirVGenerator():
138 void SpirVGenerator::apply(Module &module, const Features &f)
141 use_capability(CAP_SHADER);
143 for(Stage &s: module.stages)
146 interface_layouts.clear();
147 s.content.visit(*this);
150 writer.finalize(SPIRV_GENERATOR_MSP, next_id);
153 SpirVGenerator::StorageClass SpirVGenerator::get_interface_storage(const string &iface, bool block)
156 return STORAGE_INPUT;
157 else if(iface=="out")
158 return STORAGE_OUTPUT;
159 else if(iface=="uniform")
160 return (block ? STORAGE_UNIFORM : STORAGE_UNIFORM_CONSTANT);
161 else if(iface.empty())
162 return STORAGE_PRIVATE;
164 throw invalid_argument("SpirVGenerator::get_interface_storage");
167 SpirVGenerator::BuiltinSemantic SpirVGenerator::get_builtin_semantic(const string &name)
169 if(name=="gl_Position")
170 return BUILTIN_POSITION;
171 else if(name=="gl_PointSize")
172 return BUILTIN_POINT_SIZE;
173 else if(name=="gl_ClipDistance")
174 return BUILTIN_CLIP_DISTANCE;
175 else if(name=="gl_VertexID")
176 return BUILTIN_VERTEX_ID;
177 else if(name=="gl_InstanceID")
178 return BUILTIN_INSTANCE_ID;
179 else if(name=="gl_PrimitiveID" || name=="gl_PrimitiveIDIn")
180 return BUILTIN_PRIMITIVE_ID;
181 else if(name=="gl_InvocationID")
182 return BUILTIN_INVOCATION_ID;
183 else if(name=="gl_Layer")
184 return BUILTIN_LAYER;
185 else if(name=="gl_FragCoord")
186 return BUILTIN_FRAG_COORD;
187 else if(name=="gl_PointCoord")
188 return BUILTIN_POINT_COORD;
189 else if(name=="gl_FrontFacing")
190 return BUILTIN_FRONT_FACING;
191 else if(name=="gl_SampleId")
192 return BUILTIN_SAMPLE_ID;
193 else if(name=="gl_SamplePosition")
194 return BUILTIN_SAMPLE_POSITION;
195 else if(name=="gl_FragDepth")
196 return BUILTIN_FRAG_DEPTH;
198 throw invalid_argument("SpirVGenerator::get_builtin_semantic");
201 void SpirVGenerator::use_capability(Capability cap)
203 if(used_capabilities.count(cap))
206 used_capabilities.insert(cap);
207 writer.write_op(content.capabilities, OP_CAPABILITY, cap);
210 SpirVGenerator::Id SpirVGenerator::import_extension(const string &name)
212 Id &ext_id = imported_extension_ids[name];
216 writer.begin_op(content.extensions, OP_EXT_INST_IMPORT);
217 writer.write(ext_id);
218 writer.write_string(name);
219 writer.end_op(OP_EXT_INST_IMPORT);
224 SpirVGenerator::Id SpirVGenerator::get_id(Node &node) const
226 return get_item(declared_ids, &node).id;
229 SpirVGenerator::Id SpirVGenerator::allocate_id(Node &node, Id type_id)
231 auto i = declared_ids.find(&node);
232 if(i!=declared_ids.end())
234 if(i->second.type_id)
235 throw key_error(&node);
236 i->second.type_id = type_id;
241 declared_ids.insert(make_pair(&node, Declaration(id, type_id)));
245 SpirVGenerator::Id SpirVGenerator::allocate_forward_id(Node &node)
247 auto i = declared_ids.find(&node);
248 if(i!=declared_ids.end())
252 declared_ids.insert(make_pair(&node, Declaration(id, 0)));
256 SpirVGenerator::Id SpirVGenerator::write_constant(Id type_id, Word value, bool spec)
258 Id const_id = next_id++;
259 if(is_scalar_type(type_id, BasicTypeDeclaration::BOOL))
261 Opcode opcode = (value ? (spec ? OP_SPEC_CONSTANT_TRUE : OP_CONSTANT_TRUE) :
262 (spec ? OP_SPEC_CONSTANT_FALSE : OP_CONSTANT_FALSE));
263 writer.write_op(content.globals, opcode, type_id, const_id);
267 Opcode opcode = (spec ? OP_SPEC_CONSTANT : OP_CONSTANT);
268 writer.write_op(content.globals, opcode, type_id, const_id, value);
273 SpirVGenerator::ConstantKey SpirVGenerator::get_constant_key(Id type_id, const Variant &value)
275 if(value.check_type<bool>())
276 return ConstantKey(type_id, value.value<bool>());
277 else if(value.check_type<int>())
278 return ConstantKey(type_id, value.value<int>());
279 else if(value.check_type<unsigned>())
280 return ConstantKey(type_id, value.value<unsigned>());
281 else if(value.check_type<float>())
282 return ConstantKey(type_id, value.value<float>());
284 throw invalid_argument("SpirVGenerator::get_constant_key");
287 SpirVGenerator::Id SpirVGenerator::get_constant_id(Id type_id, const Variant &value)
289 ConstantKey key = get_constant_key(type_id, value);
290 Id &const_id = constant_ids[key];
292 const_id = write_constant(type_id, key.int_value, false);
296 SpirVGenerator::Id SpirVGenerator::get_vector_constant_id(Id type_id, unsigned size, Id scalar_id)
298 Id &const_id = constant_ids[get_constant_key(type_id, static_cast<int>(scalar_id))];
301 const_id = next_id++;
302 writer.begin_op(content.globals, OP_CONSTANT_COMPOSITE, 3+size);
303 writer.write(type_id);
304 writer.write(const_id);
305 for(unsigned i=0; i<size; ++i)
306 writer.write(scalar_id);
307 writer.end_op(OP_CONSTANT_COMPOSITE);
312 SpirVGenerator::Id SpirVGenerator::get_standard_type_id(BasicTypeDeclaration::Kind kind, unsigned size, bool sign)
314 Id base_id = (size>1 ? get_standard_type_id(kind, 1, sign) : 0);
315 Id &type_id = standard_type_ids[base_id ? TypeKey(base_id, size) : TypeKey(kind, sign)];
320 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, base_id, size);
321 else if(kind==BasicTypeDeclaration::VOID)
322 writer.write_op(content.globals, OP_TYPE_VOID, type_id);
323 else if(kind==BasicTypeDeclaration::BOOL)
324 writer.write_op(content.globals, OP_TYPE_BOOL, type_id);
325 else if(kind==BasicTypeDeclaration::INT)
326 writer.write_op(content.globals, OP_TYPE_INT, type_id, 32, sign);
327 else if(kind==BasicTypeDeclaration::FLOAT)
328 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, 32);
330 throw invalid_argument("SpirVGenerator::get_standard_type_id");
335 bool SpirVGenerator::is_scalar_type(Id type_id, BasicTypeDeclaration::Kind kind) const
337 auto i = standard_type_ids.find(TypeKey(kind, true));
338 return (i!=standard_type_ids.end() && i->second==type_id);
341 SpirVGenerator::Id SpirVGenerator::get_array_type_id(TypeDeclaration &base_type, Id size_id, bool extended_align)
343 Id base_type_id = get_id(base_type);
344 Id &array_type_id = array_type_ids[TypeKey(base_type_id, extended_align*0x400000 | size_id)];
347 array_type_id = next_id++;
349 writer.write_op(content.globals, OP_TYPE_ARRAY, array_type_id, base_type_id, size_id);
351 writer.write_op(content.globals, OP_TYPE_RUNTIME_ARRAY, array_type_id, base_type_id);
353 unsigned stride = MemoryRequirementsCalculator().apply(base_type).stride;
355 stride = (stride+15)&~15U;
356 writer.write_op_decorate(array_type_id, DECO_ARRAY_STRIDE, stride);
359 return array_type_id;
362 SpirVGenerator::Id SpirVGenerator::get_pointer_type_id(Id type_id, StorageClass storage)
364 Id &ptr_type_id = pointer_type_ids[TypeKey(type_id, storage)];
367 ptr_type_id = next_id++;
368 writer.write_op(content.globals, OP_TYPE_POINTER, ptr_type_id, storage, type_id);
373 SpirVGenerator::Id SpirVGenerator::get_variable_type_id(const VariableDeclaration &var)
375 if(const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var.type_declaration))
376 if(basic->kind==BasicTypeDeclaration::ARRAY)
381 SetFlag set_const(constant_expression);
382 r_expression_result_id = 0;
383 var.array_size->visit(*this);
384 size_id = r_expression_result_id;
387 size_id = get_constant_id(get_standard_type_id(BasicTypeDeclaration::INT, 1), 1);
388 return get_array_type_id(*basic->base_type, size_id, true);
391 return get_id(*var.type_declaration);
394 SpirVGenerator::Id SpirVGenerator::get_load_id(VariableDeclaration &var)
396 Id &load_result_id = variable_load_ids[&var];
399 load_result_id = next_id++;
400 writer.write_op(content.function_body, OP_LOAD, get_variable_type_id(var), load_result_id, get_id(var));
402 return load_result_id;
405 void SpirVGenerator::prune_loads(Id min_id)
407 for(auto i=variable_load_ids.begin(); i!=variable_load_ids.end(); )
409 if(i->second>=min_id)
410 variable_load_ids.erase(i++);
416 SpirVGenerator::Id SpirVGenerator::begin_expression(Opcode opcode, Id type_id, unsigned n_args)
418 bool has_result = (opcode==OP_FUNCTION_CALL || !is_scalar_type(type_id, BasicTypeDeclaration::VOID));
419 if(!constant_expression)
421 if(!current_function)
422 throw internal_error("non-constant expression outside a function");
424 writer.begin_op(content.function_body, opcode, (n_args ? 1+has_result*2+n_args : 0));
426 else if(opcode==OP_COMPOSITE_CONSTRUCT)
427 writer.begin_op(content.globals, (spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE),
428 (n_args ? 1+has_result*2+n_args : 0));
429 else if(!spec_constant)
430 throw internal_error("invalid non-specialization constant expression");
432 writer.begin_op(content.globals, OP_SPEC_CONSTANT_OP, (n_args ? 2+has_result*2+n_args : 0));
434 Id result_id = next_id++;
437 writer.write(type_id);
438 writer.write(result_id);
440 if(spec_constant && opcode!=OP_COMPOSITE_CONSTRUCT)
441 writer.write(opcode);
446 void SpirVGenerator::end_expression(Opcode opcode)
448 if(constant_expression)
449 opcode = (opcode==OP_COMPOSITE_CONSTRUCT ? spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE : OP_SPEC_CONSTANT_OP);
450 writer.end_op(opcode);
453 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id arg_id)
455 Id result_id = begin_expression(opcode, type_id, 1);
456 writer.write(arg_id);
457 end_expression(opcode);
461 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id left_id, Id right_id)
463 Id result_id = begin_expression(opcode, type_id, 2);
464 writer.write(left_id);
465 writer.write(right_id);
466 end_expression(opcode);
470 void SpirVGenerator::write_deconstruct(Id elem_type_id, Id composite_id, Id *elem_ids, unsigned n_elems)
472 for(unsigned i=0; i<n_elems; ++i)
474 elem_ids[i] = begin_expression(OP_COMPOSITE_EXTRACT, elem_type_id, 2);
475 writer.write(composite_id);
477 end_expression(OP_COMPOSITE_EXTRACT);
481 SpirVGenerator::Id SpirVGenerator::write_construct(Id type_id, const Id *elem_ids, unsigned n_elems)
483 Id result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, type_id, n_elems);
484 for(unsigned i=0; i<n_elems; ++i)
485 writer.write(elem_ids[i]);
486 end_expression(OP_COMPOSITE_CONSTRUCT);
491 void SpirVGenerator::visit(Block &block)
493 for(const RefPtr<Statement> &s: block.body)
497 void SpirVGenerator::visit(Literal &literal)
499 Id type_id = get_id(*literal.type);
501 r_expression_result_id = write_constant(type_id, get_constant_key(type_id, literal.value).int_value, true);
503 r_expression_result_id = get_constant_id(type_id, literal.value);
504 r_constant_result = true;
507 void SpirVGenerator::visit(VariableReference &var)
509 if(constant_expression || var.declaration->constant)
511 if(!var.declaration->constant)
512 throw internal_error("reference to non-constant variable in constant context");
514 r_expression_result_id = get_id(*var.declaration);
515 r_constant_result = true;
518 else if(!current_function)
519 throw internal_error("non-constant context outside a function");
521 r_constant_result = false;
524 r_expression_result_id = 0;
525 if(!assignment_source_id)
527 auto i = variable_load_ids.find(var.declaration);
528 if(i!=variable_load_ids.end())
529 r_expression_result_id = i->second;
531 if(!r_expression_result_id)
532 r_composite_base = var.declaration;
534 else if(assignment_source_id)
536 writer.write_op(content.function_body, OP_STORE, get_id(*var.declaration), assignment_source_id);
537 variable_load_ids[var.declaration] = assignment_source_id;
538 r_expression_result_id = assignment_source_id;
541 r_expression_result_id = get_load_id(*var.declaration);
544 void SpirVGenerator::visit(InterfaceBlockReference &iface)
546 if(!composite_access || !current_function)
547 throw internal_error("invalid interface block reference");
549 r_composite_base = iface.declaration;
550 r_expression_result_id = 0;
551 r_constant_result = false;
554 void SpirVGenerator::generate_composite_access(TypeDeclaration &result_type)
557 Id result_type_id = get_id(result_type);
558 Id access_type_id = result_type_id;
561 if(constant_expression)
562 throw internal_error("composite access through pointer in constant context");
564 Id int32_type_id = get_standard_type_id(BasicTypeDeclaration::INT, 1);
565 for(unsigned &i: r_composite_chain)
566 i = (i<0x400000 ? get_constant_id(int32_type_id, static_cast<int>(i)) : i&0x3FFFFF);
568 /* Find the storage class of the base and obtain appropriate pointer type
570 const Declaration &base_decl = get_item(declared_ids, r_composite_base);
571 auto i = pointer_type_ids.begin();
572 for(; (i!=pointer_type_ids.end() && i->second!=base_decl.type_id); ++i) ;
573 if(i==pointer_type_ids.end())
574 throw internal_error("could not find storage class");
575 access_type_id = get_pointer_type_id(result_type_id, static_cast<StorageClass>(i->first.detail));
577 opcode = OP_ACCESS_CHAIN;
579 else if(assignment_source_id)
580 throw internal_error("assignment to temporary composite");
583 for(unsigned &i: r_composite_chain)
584 for(auto j=constant_ids.begin(); (i>=0x400000 && j!=constant_ids.end()); ++j)
585 if(j->second==(i&0x3FFFFF))
586 i = j->first.int_value;
588 opcode = OP_COMPOSITE_EXTRACT;
591 Id access_id = begin_expression(opcode, access_type_id, 1+r_composite_chain.size());
592 writer.write(r_composite_base_id);
593 for(unsigned i: r_composite_chain)
595 end_expression(opcode);
597 r_constant_result = false;
600 if(assignment_source_id)
602 writer.write_op(content.function_body, OP_STORE, access_id, assignment_source_id);
603 r_expression_result_id = assignment_source_id;
606 r_expression_result_id = write_expression(OP_LOAD, result_type_id, access_id);
609 r_expression_result_id = access_id;
612 void SpirVGenerator::visit_composite(Expression &base_expr, unsigned index, TypeDeclaration &type)
614 if(!composite_access)
616 r_composite_base = 0;
617 r_composite_base_id = 0;
618 r_composite_chain.clear();
622 SetFlag set_composite(composite_access);
623 base_expr.visit(*this);
626 if(!r_composite_base_id)
627 r_composite_base_id = (r_composite_base ? get_id(*r_composite_base) : r_expression_result_id);
629 r_composite_chain.push_back(index);
630 if(!composite_access)
631 generate_composite_access(type);
633 r_expression_result_id = 0;
636 void SpirVGenerator::visit_isolated(Expression &expr)
638 SetForScope<Id> clear_assign(assignment_source_id, 0);
639 SetFlag clear_composite(composite_access, false);
640 SetForScope<Node *> clear_base(r_composite_base, 0);
641 SetForScope<Id> clear_base_id(r_composite_base_id, 0);
642 vector<unsigned> saved_chain;
643 swap(saved_chain, r_composite_chain);
645 swap(saved_chain, r_composite_chain);
648 void SpirVGenerator::visit(MemberAccess &memacc)
650 visit_composite(*memacc.left, memacc.index, *memacc.type);
653 void SpirVGenerator::visit(Swizzle &swizzle)
656 visit_composite(*swizzle.left, swizzle.components[0], *swizzle.type);
657 else if(assignment_source_id)
659 const BasicTypeDeclaration &basic = dynamic_cast<const BasicTypeDeclaration &>(*swizzle.left->type);
662 for(unsigned i=0; i<swizzle.count; ++i)
663 mask |= 1<<swizzle.components[i];
665 visit_isolated(*swizzle.left);
667 Id combined_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.left->type), 2+basic.size);
668 writer.write(r_expression_result_id);
669 writer.write(assignment_source_id);
670 for(unsigned i=0; i<basic.size; ++i)
671 writer.write(i+((mask>>i)&1)*basic.size);
672 end_expression(OP_VECTOR_SHUFFLE);
674 SetForScope<Id> set_assign(assignment_source_id, combined_id);
675 swizzle.left->visit(*this);
677 r_expression_result_id = combined_id;
681 swizzle.left->visit(*this);
682 Id left_id = r_expression_result_id;
684 r_expression_result_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.type), 2+swizzle.count);
685 writer.write(left_id);
686 writer.write(left_id);
687 for(unsigned i=0; i<swizzle.count; ++i)
688 writer.write(swizzle.components[i]);
689 end_expression(OP_VECTOR_SHUFFLE);
691 r_constant_result = false;
694 void SpirVGenerator::visit(UnaryExpression &unary)
697 return visit_isolated(unary);
699 unary.expression->visit(*this);
701 char oper = unary.oper->token[0];
702 char oper2 = unary.oper->token[1];
703 if(oper=='+' && !oper2)
706 BasicTypeDeclaration &basic = dynamic_cast<BasicTypeDeclaration &>(*unary.expression->type);
707 BasicTypeDeclaration &elem = *get_element_type(basic);
709 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
710 /* SPIR-V allows constant operations on floating-point values only for
712 throw internal_error("invalid operands for constant unary expression");
714 Id result_type_id = get_id(*unary.type);
715 Opcode opcode = OP_NOP;
717 r_constant_result = false;
719 opcode = OP_LOGICAL_NOT;
722 else if(oper=='-' && !oper2)
724 opcode = (elem.kind==BasicTypeDeclaration::INT ? OP_S_NEGATE : OP_F_NEGATE);
726 if(basic.kind==BasicTypeDeclaration::MATRIX)
728 Id column_type_id = get_id(*basic.base_type);
729 unsigned n_columns = basic.size&0xFFFF;
731 write_deconstruct(column_type_id, r_expression_result_id, column_ids, n_columns);
732 for(unsigned i=0; i<n_columns; ++i)
733 column_ids[i] = write_expression(opcode, column_type_id, column_ids[i]);
734 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
738 else if((oper=='+' || oper=='-') && oper2==oper)
740 if(constant_expression)
741 throw internal_error("increment or decrement in constant expression");
744 if(elem.kind==BasicTypeDeclaration::INT)
746 opcode = (oper=='+' ? OP_I_ADD : OP_I_SUB);
747 one_id = get_constant_id(get_id(elem), 1);
749 else if(elem.kind==BasicTypeDeclaration::FLOAT)
751 opcode = (oper=='+' ? OP_F_ADD : OP_F_SUB);
752 one_id = get_constant_id(get_id(elem), 1.0f);
755 throw internal_error("invalid increment/decrement");
757 if(basic.kind==BasicTypeDeclaration::VECTOR)
758 one_id = get_vector_constant_id(result_type_id, basic.size, one_id);
760 Id post_value_id = write_expression(opcode, result_type_id, r_expression_result_id, one_id);
762 SetForScope<Id> set_assign(assignment_source_id, post_value_id);
763 unary.expression->visit(*this);
765 r_expression_result_id = (unary.oper->type==Operator::POSTFIX ? r_expression_result_id : post_value_id);
770 throw internal_error("unknown unary operator");
772 r_expression_result_id = write_expression(opcode, result_type_id, r_expression_result_id);
775 void SpirVGenerator::visit(BinaryExpression &binary)
777 char oper = binary.oper->token[0];
780 visit_isolated(*binary.right);
781 return visit_composite(*binary.left, 0x400000|r_expression_result_id, *binary.type);
783 else if(composite_access)
784 return visit_isolated(binary);
786 if(assignment_source_id)
787 throw internal_error("invalid binary expression in assignment target");
789 BasicTypeDeclaration &basic_left = dynamic_cast<BasicTypeDeclaration &>(*binary.left->type);
790 BasicTypeDeclaration &basic_right = dynamic_cast<BasicTypeDeclaration &>(*binary.right->type);
791 // Expression resolver ensures that element types are the same
792 BasicTypeDeclaration &elem = *get_element_type(basic_left);
794 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
795 /* SPIR-V allows constant operations on floating-point values only for
797 throw internal_error("invalid operands for constant binary expression");
799 binary.left->visit(*this);
800 Id left_id = r_expression_result_id;
801 binary.right->visit(*this);
802 Id right_id = r_expression_result_id;
804 Id result_type_id = get_id(*binary.type);
805 Opcode opcode = OP_NOP;
806 bool swap_operands = false;
808 r_constant_result = false;
810 char oper2 = binary.oper->token[1];
811 if((oper=='<' || oper=='>') && oper2!=oper)
813 if(basic_left.kind==BasicTypeDeclaration::INT)
816 opcode = (oper=='<' ? (oper2=='=' ? OP_S_LESS_THAN_EQUAL : OP_S_LESS_THAN) :
817 (oper2=='=' ? OP_S_GREATER_THAN_EQUAL : OP_S_GREATER_THAN));
819 opcode = (oper=='<' ? (oper2=='=' ? OP_U_LESS_THAN_EQUAL : OP_U_LESS_THAN) :
820 (oper2=='=' ? OP_U_GREATER_THAN_EQUAL : OP_U_GREATER_THAN));
822 else if(basic_left.kind==BasicTypeDeclaration::FLOAT)
823 opcode = (oper=='<' ? (oper2=='=' ? OP_F_ORD_LESS_THAN_EQUAL : OP_F_ORD_LESS_THAN) :
824 (oper2=='=' ? OP_F_ORD_GREATER_THAN_EQUAL : OP_F_ORD_GREATER_THAN));
826 else if((oper=='=' || oper=='!') && oper2=='=')
828 if(elem.kind==BasicTypeDeclaration::BOOL)
829 opcode = (oper=='=' ? OP_LOGICAL_EQUAL : OP_LOGICAL_NOT_EQUAL);
830 else if(elem.kind==BasicTypeDeclaration::INT)
831 opcode = (oper=='=' ? OP_I_EQUAL : OP_I_NOT_EQUAL);
832 else if(elem.kind==BasicTypeDeclaration::FLOAT)
833 opcode = (oper=='=' ? OP_F_ORD_EQUAL : OP_F_ORD_NOT_EQUAL);
835 if(opcode!=OP_NOP && basic_left.base_type)
837 /* The SPIR-V equality operations produce component-wise results, but
838 GLSL operators return a single boolean. Use the any/all operations to
839 combine the results. */
840 Opcode combine_op = (oper=='!' ? OP_ANY : OP_ALL);
841 unsigned n_elems = basic_left.size&0xFFFF;
842 Id bool_vec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, n_elems);
845 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
846 compare_id = write_expression(opcode, bool_vec_type_id, left_id, right_id);
847 else if(basic_left.kind==BasicTypeDeclaration::MATRIX)
849 Id column_type_id = get_id(*basic_left.base_type);
851 write_deconstruct(column_type_id, left_id, column_ids, n_elems);
852 write_deconstruct(column_type_id, right_id, column_ids+4, n_elems);
854 Id column_bvec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, basic_left.size>>16);
855 for(unsigned i=0; i<n_elems; ++i)
857 compare_id = write_expression(opcode, column_bvec_type_id, column_ids[i], column_ids[4+i]);
858 column_ids[i] = write_expression(combine_op, result_type_id, compare_id);;
861 compare_id = write_construct(bool_vec_type_id, column_ids, n_elems);
865 r_expression_result_id = write_expression(combine_op, result_type_id, compare_id);
869 else if(oper2=='&' && elem.kind==BasicTypeDeclaration::BOOL)
870 opcode = OP_LOGICAL_AND;
871 else if(oper2=='|' && elem.kind==BasicTypeDeclaration::BOOL)
872 opcode = OP_LOGICAL_OR;
873 else if(oper2=='^' && elem.kind==BasicTypeDeclaration::BOOL)
874 opcode = OP_LOGICAL_NOT_EQUAL;
875 else if(oper=='&' && elem.kind==BasicTypeDeclaration::INT)
876 opcode = OP_BITWISE_AND;
877 else if(oper=='|' && elem.kind==BasicTypeDeclaration::INT)
878 opcode = OP_BITWISE_OR;
879 else if(oper=='^' && elem.kind==BasicTypeDeclaration::INT)
880 opcode = OP_BITWISE_XOR;
881 else if(oper=='<' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
882 opcode = OP_SHIFT_LEFT_LOGICAL;
883 else if(oper=='>' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
884 opcode = OP_SHIFT_RIGHT_ARITHMETIC;
885 else if(oper=='%' && elem.kind==BasicTypeDeclaration::INT)
886 opcode = (elem.sign ? OP_S_MOD : OP_U_MOD);
887 else if(oper=='+' || oper=='-' || oper=='*' || oper=='/')
889 Opcode elem_op = OP_NOP;
890 if(elem.kind==BasicTypeDeclaration::INT)
893 elem_op = (elem.sign ? OP_S_DIV : OP_U_DIV);
895 elem_op = (oper=='+' ? OP_I_ADD : oper=='-' ? OP_I_SUB : OP_I_MUL);
897 else if(elem.kind==BasicTypeDeclaration::FLOAT)
898 elem_op = (oper=='+' ? OP_F_ADD : oper=='-' ? OP_F_SUB : oper=='*' ? OP_F_MUL : OP_F_DIV);
900 if(oper=='*' && (basic_left.base_type || basic_right.base_type) && elem.kind==BasicTypeDeclaration::FLOAT)
902 /* Multiplication between floating-point vectors and matrices has
903 dedicated operations. */
904 if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
905 opcode = OP_MATRIX_TIMES_MATRIX;
906 else if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
908 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
909 opcode = OP_VECTOR_TIMES_MATRIX;
910 else if(basic_right.kind==BasicTypeDeclaration::VECTOR)
911 opcode = OP_MATRIX_TIMES_VECTOR;
914 opcode = OP_MATRIX_TIMES_SCALAR;
915 swap_operands = (basic_right.kind==BasicTypeDeclaration::MATRIX);
918 else if(basic_left.kind==BasicTypeDeclaration::VECTOR && basic_right.kind==BasicTypeDeclaration::VECTOR)
922 opcode = OP_VECTOR_TIMES_SCALAR;
923 swap_operands = (basic_right.kind==BasicTypeDeclaration::VECTOR);
926 else if((basic_left.base_type!=0)!=(basic_right.base_type!=0))
928 /* One operand is scalar and the other is a vector or a matrix.
929 Expand the scalar to a vector of appropriate size. */
930 Id &scalar_id = (basic_left.base_type ? right_id : left_id);
931 BasicTypeDeclaration *vector_type = (basic_left.base_type ? &basic_left : &basic_right);
932 if(vector_type->kind==BasicTypeDeclaration::MATRIX)
933 vector_type = dynamic_cast<BasicTypeDeclaration *>(vector_type->base_type);
934 Id vector_type_id = get_id(*vector_type);
936 Id expanded_id = begin_expression(OP_COMPOSITE_CONSTRUCT, vector_type_id, vector_type->size);
937 for(unsigned i=0; i<vector_type->size; ++i)
938 writer.write(scalar_id);
939 end_expression(OP_COMPOSITE_CONSTRUCT);
941 scalar_id = expanded_id;
943 if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
945 // Apply matrix operation column-wise.
946 Id matrix_id = (basic_left.base_type ? left_id : right_id);
949 unsigned n_columns = (basic_left.base_type ? basic_left.size : basic_right.size)&0xFFFF;
950 write_deconstruct(vector_type_id, matrix_id, column_ids, n_columns);
952 for(unsigned i=0; i<n_columns; ++i)
953 column_ids[i] = write_expression(elem_op, vector_type_id, column_ids[i], expanded_id);
955 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
961 else if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
964 throw internal_error("non-float matrix multiplication");
966 /* Other operations involving matrices need to be performed
968 Id column_type_id = get_id(*basic_left.base_type);
971 unsigned n_columns = basic_left.size&0xFFFF;
972 write_deconstruct(column_type_id, left_id, column_ids, n_columns);
973 write_deconstruct(column_type_id, right_id, column_ids+4, n_columns);
975 for(unsigned i=0; i<n_columns; ++i)
976 column_ids[i] = write_expression(elem_op, column_type_id, column_ids[i], column_ids[4+i]);
978 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
981 else if(basic_left.kind==basic_right.kind)
982 // Both operands are either scalars or vectors.
987 throw internal_error("unknown binary operator");
990 swap(left_id, right_id);
992 r_expression_result_id = write_expression(opcode, result_type_id, left_id, right_id);
995 void SpirVGenerator::visit(Assignment &assign)
997 if(assign.oper->token[0]!='=')
998 visit(static_cast<BinaryExpression &>(assign));
1000 assign.right->visit(*this);
1002 SetForScope<Id> set_assign(assignment_source_id, r_expression_result_id);
1003 assign.left->visit(*this);
1004 r_constant_result = false;
1007 void SpirVGenerator::visit(TernaryExpression &ternary)
1009 if(composite_access)
1010 return visit_isolated(ternary);
1011 if(constant_expression)
1013 ternary.condition->visit(*this);
1014 Id condition_id = r_expression_result_id;
1015 ternary.true_expr->visit(*this);
1016 Id true_result_id = r_expression_result_id;
1017 ternary.false_expr->visit(*this);
1018 Id false_result_id = r_expression_result_id;
1020 r_expression_result_id = begin_expression(OP_SELECT, get_id(*ternary.type), 3);
1021 writer.write(condition_id);
1022 writer.write(true_result_id);
1023 writer.write(false_result_id);
1024 end_expression(OP_SELECT);
1029 ternary.condition->visit(*this);
1030 Id condition_id = r_expression_result_id;
1032 Id true_label_id = next_id++;
1033 Id false_label_id = next_id++;
1034 Id merge_block_id = next_id++;
1035 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1036 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, condition_id, true_label_id, false_label_id);
1038 writer.write_op_label(true_label_id);
1039 ternary.true_expr->visit(*this);
1040 Id true_result_id = r_expression_result_id;
1041 true_label_id = writer.get_current_block();
1042 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1044 writer.write_op_label(false_label_id);
1045 ternary.false_expr->visit(*this);
1046 Id false_result_id = r_expression_result_id;
1047 false_label_id = writer.get_current_block();
1049 writer.write_op_label(merge_block_id);
1050 r_expression_result_id = begin_expression(OP_PHI, get_id(*ternary.type), 4);
1051 writer.write(true_result_id);
1052 writer.write(true_label_id);
1053 writer.write(false_result_id);
1054 writer.write(false_label_id);
1055 end_expression(OP_PHI);
1057 r_constant_result = false;
1060 void SpirVGenerator::visit(FunctionCall &call)
1062 if(assignment_source_id)
1063 throw internal_error("assignment to function call");
1064 else if(composite_access)
1065 return visit_isolated(call);
1066 else if(call.constructor && call.arguments.size()==1 && call.arguments[0]->type==call.type)
1067 return call.arguments[0]->visit(*this);
1069 vector<Id> argument_ids;
1070 argument_ids.reserve(call.arguments.size());
1071 bool all_args_const = true;
1072 for(const RefPtr<Expression> &a: call.arguments)
1075 argument_ids.push_back(r_expression_result_id);
1076 all_args_const &= r_constant_result;
1079 if(constant_expression && (!call.constructor || !all_args_const))
1080 throw internal_error("function call in constant expression");
1082 Id result_type_id = get_id(*call.type);
1083 r_constant_result = false;
1085 if(call.constructor)
1086 visit_constructor(call, argument_ids, all_args_const);
1087 else if(call.declaration->source==BUILTIN_SOURCE)
1090 for(const RefPtr<Expression> &a: call.arguments)
1091 if(BasicTypeDeclaration *basic_arg = dynamic_cast<BasicTypeDeclaration *>(a->type))
1093 BasicTypeDeclaration &elem_arg = *get_element_type(*basic_arg);
1094 switch(elem_arg.kind)
1096 case BasicTypeDeclaration::BOOL: arg_types += 'b'; break;
1097 case BasicTypeDeclaration::INT: arg_types += (elem_arg.sign ? 'i' : 'u'); break;
1098 case BasicTypeDeclaration::FLOAT: arg_types += 'f'; break;
1099 default: arg_types += '?';
1103 const BuiltinFunctionInfo *builtin_info;
1104 for(builtin_info=builtin_functions; builtin_info->function[0]; ++builtin_info)
1105 if(builtin_info->function==call.name && (!builtin_info->arg_types[0] || builtin_info->arg_types==arg_types))
1108 if(builtin_info->capability)
1109 use_capability(static_cast<Capability>(builtin_info->capability));
1111 if(builtin_info->opcode)
1114 if(builtin_info->extension[0])
1116 opcode = OP_EXT_INST;
1117 Id ext_id = import_extension(builtin_info->extension);
1119 r_expression_result_id = begin_expression(opcode, result_type_id);
1120 writer.write(ext_id);
1121 writer.write(builtin_info->opcode);
1125 opcode = static_cast<Opcode>(builtin_info->opcode);
1126 r_expression_result_id = begin_expression(opcode, result_type_id);
1129 for(unsigned i=0; i<call.arguments.size(); ++i)
1131 if(!builtin_info->arg_order[i] || builtin_info->arg_order[i]>argument_ids.size())
1132 throw internal_error("invalid builtin function info");
1133 writer.write(argument_ids[builtin_info->arg_order[i]-1]);
1136 end_expression(opcode);
1138 else if(builtin_info->handler)
1139 (this->*(builtin_info->handler))(call, argument_ids);
1141 throw internal_error("unknown builtin function "+call.name);
1145 r_expression_result_id = begin_expression(OP_FUNCTION_CALL, result_type_id, 1+call.arguments.size());
1146 writer.write(get_id(*call.declaration->definition));
1147 for(Id i: argument_ids)
1149 end_expression(OP_FUNCTION_CALL);
1151 // Any global variables the called function uses might have changed value
1152 set<Node *> dependencies = DependencyCollector().apply(*call.declaration->definition);
1153 for(Node *n: dependencies)
1154 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(n))
1155 variable_load_ids.erase(var);
1159 void SpirVGenerator::visit_constructor(FunctionCall &call, const vector<Id> &argument_ids, bool all_args_const)
1161 Id result_type_id = get_id(*call.type);
1163 BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(call.type);
1166 if(dynamic_cast<const StructDeclaration *>(call.type))
1167 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1169 throw internal_error("unconstructable type "+call.name);
1173 SetFlag set_const(constant_expression, constant_expression || all_args_const);
1175 BasicTypeDeclaration &elem = *get_element_type(*basic);
1176 BasicTypeDeclaration &basic_arg0 = dynamic_cast<BasicTypeDeclaration &>(*call.arguments[0]->type);
1177 BasicTypeDeclaration &elem_arg0 = *get_element_type(basic_arg0);
1179 if(basic->kind==BasicTypeDeclaration::MATRIX)
1181 Id col_type_id = get_id(*basic->base_type);
1182 unsigned n_columns = basic->size&0xFFFF;
1183 unsigned n_rows = basic->size>>16;
1186 if(call.arguments.size()==1)
1188 // Construct diagonal matrix from a single scalar.
1189 Id zero_id = get_constant_id(get_id(elem), 0.0f);
1190 for(unsigned i=0; i<n_columns; ++i)
1192 column_ids[i] = begin_expression(OP_COMPOSITE_CONSTRUCT, col_type_id, n_rows);
1193 for(unsigned j=0; j<n_rows; ++j)
1194 writer.write(j==i ? argument_ids[0] : zero_id);
1195 end_expression(OP_COMPOSITE_CONSTRUCT);
1199 // Construct a matrix from column vectors
1200 copy(argument_ids.begin(), argument_ids.begin()+n_columns, column_ids);
1202 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
1204 else if(basic->kind==BasicTypeDeclaration::VECTOR && (call.arguments.size()>1 || basic_arg0.kind!=BasicTypeDeclaration::VECTOR))
1206 /* There's either a single scalar argument or multiple arguments
1207 which make up the vector's components. */
1208 if(call.arguments.size()==1)
1210 r_expression_result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, result_type_id);
1211 for(unsigned i=0; i<basic->size; ++i)
1212 writer.write(argument_ids[0]);
1213 end_expression(OP_COMPOSITE_CONSTRUCT);
1216 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1218 else if(elem.kind==BasicTypeDeclaration::BOOL)
1220 if(constant_expression)
1221 throw internal_error("unconverted constant");
1223 // Conversion to boolean is implemented as comparing against zero.
1224 Id number_type_id = get_id(elem_arg0);
1225 Id zero_id = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ?
1226 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1227 if(basic_arg0.kind==BasicTypeDeclaration::VECTOR)
1228 zero_id = get_vector_constant_id(get_id(basic_arg0), basic_arg0.size, zero_id);
1230 Opcode opcode = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ? OP_F_ORD_NOT_EQUAL : OP_I_NOT_EQUAL);
1231 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0], zero_id);
1233 else if(elem_arg0.kind==BasicTypeDeclaration::BOOL)
1235 if(constant_expression)
1236 throw internal_error("unconverted constant");
1238 /* Conversion from boolean is implemented as selecting from zero
1240 Id number_type_id = get_id(elem);
1241 Id zero_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1242 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1243 Id one_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1244 get_constant_id(number_type_id, 1.0f) : get_constant_id(number_type_id, 1));
1245 if(basic->kind==BasicTypeDeclaration::VECTOR)
1247 zero_id = get_vector_constant_id(get_id(*basic), basic->size, zero_id);
1248 one_id = get_vector_constant_id(get_id(*basic), basic->size, one_id);
1251 r_expression_result_id = begin_expression(OP_SELECT, result_type_id, 3);
1252 writer.write(argument_ids[0]);
1253 writer.write(zero_id);
1254 writer.write(one_id);
1255 end_expression(OP_SELECT);
1259 if(constant_expression)
1260 throw internal_error("unconverted constant");
1262 // Scalar or vector conversion between types of equal size.
1264 if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::FLOAT)
1265 opcode = (elem.sign ? OP_CONVERT_F_TO_S : OP_CONVERT_F_TO_U);
1266 else if(elem.kind==BasicTypeDeclaration::FLOAT && elem_arg0.kind==BasicTypeDeclaration::INT)
1267 opcode = (elem_arg0.sign ? OP_CONVERT_S_TO_F : OP_CONVERT_U_TO_F);
1268 else if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::INT)
1269 opcode = OP_BITCAST;
1271 throw internal_error("invalid conversion");
1273 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0]);
1277 void SpirVGenerator::visit_builtin_matrix_comp_mult(FunctionCall &call, const vector<Id> &argument_ids)
1279 if(argument_ids.size()!=2)
1280 throw internal_error("invalid matrixCompMult call");
1282 const BasicTypeDeclaration &basic_arg0 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[0]->type);
1283 Id column_type_id = get_id(*basic_arg0.base_type);
1286 unsigned n_columns = basic_arg0.size&0xFFFF;
1287 write_deconstruct(column_type_id, argument_ids[0], column_ids, n_columns);
1288 write_deconstruct(column_type_id, argument_ids[1], column_ids+4, n_columns);
1290 for(unsigned i=0; i<n_columns; ++i)
1291 column_ids[i] = write_expression(OP_F_MUL, column_type_id, column_ids[i], column_ids[4+i]);
1293 r_expression_result_id = write_construct(get_id(*call.type), column_ids, n_columns);
1296 void SpirVGenerator::visit_builtin_texture_query(FunctionCall &call, const vector<Id> &argument_ids)
1298 if(argument_ids.size()<1)
1299 throw internal_error("invalid texture query call");
1302 if(call.name=="textureSize")
1303 opcode = OP_IMAGE_QUERY_SIZE_LOD;
1304 else if(call.name=="textureQueryLod")
1305 opcode = OP_IMAGE_QUERY_LOD;
1306 else if(call.name=="textureQueryLevels")
1307 opcode = OP_IMAGE_QUERY_LEVELS;
1309 throw internal_error("invalid texture query call");
1311 ImageTypeDeclaration &image_arg0 = dynamic_cast<ImageTypeDeclaration &>(*call.arguments[0]->type);
1314 if(image_arg0.sampled)
1316 Id image_type_id = get_item(image_type_ids, get_id(image_arg0));
1317 image_id = write_expression(OP_IMAGE, image_type_id, argument_ids[0]);
1320 image_id = argument_ids[0];
1322 Id result_type_id = get_id(*call.type);
1323 r_expression_result_id = begin_expression(opcode, result_type_id, argument_ids.size());
1324 writer.write(image_id);
1325 for(unsigned i=1; i<argument_ids.size(); ++i)
1326 writer.write(argument_ids[i]);
1327 end_expression(opcode);
1330 void SpirVGenerator::visit_builtin_texture(FunctionCall &call, const vector<Id> &argument_ids)
1332 if(argument_ids.size()<2)
1333 throw internal_error("invalid texture sampling call");
1335 bool explicit_lod = (stage->type!=Stage::FRAGMENT || call.name=="textureLod");
1336 Id lod_id = (!explicit_lod ? 0 : call.name=="textureLod" ? argument_ids.back() :
1337 get_constant_id(get_standard_type_id(BasicTypeDeclaration::FLOAT, 1), 0.0f));
1339 const ImageTypeDeclaration &image = dynamic_cast<const ImageTypeDeclaration &>(*call.arguments[0]->type);
1342 Id result_type_id = get_id(*call.type);
1346 if(argument_ids.size()==2)
1348 const BasicTypeDeclaration &basic_arg1 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[1]->type);
1349 dref_id = begin_expression(OP_COMPOSITE_EXTRACT, get_id(*basic_arg1.base_type), 2);
1350 writer.write(argument_ids.back());
1351 writer.write(basic_arg1.size-1);
1352 end_expression(OP_COMPOSITE_EXTRACT);
1355 dref_id = argument_ids[2];
1357 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_DREF_EXPLICIT_LOD : OP_IMAGE_SAMPLE_DREF_IMPLICIT_LOD);
1358 r_expression_result_id = begin_expression(opcode, result_type_id, 3+explicit_lod*2);
1362 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_EXPLICIT_LOD : OP_IMAGE_SAMPLE_IMPLICIT_LOD);
1363 r_expression_result_id = begin_expression(opcode, result_type_id, 2+explicit_lod*2);
1366 for(unsigned i=0; i<2; ++i)
1367 writer.write(argument_ids[i]);
1369 writer.write(dref_id);
1372 writer.write(2); // Lod
1373 writer.write(lod_id);
1376 end_expression(opcode);
1379 void SpirVGenerator::visit_builtin_texel_fetch(FunctionCall &call, const vector<Id> &argument_ids)
1381 if(argument_ids.size()!=3)
1382 throw internal_error("invalid texelFetch call");
1384 r_expression_result_id = begin_expression(OP_IMAGE_FETCH, get_id(*call.type), 4);
1385 for(unsigned i=0; i<2; ++i)
1386 writer.write(argument_ids[i]);
1387 writer.write(2); // Lod
1388 writer.write(argument_ids.back());
1389 end_expression(OP_IMAGE_FETCH);
1392 void SpirVGenerator::visit_builtin_interpolate(FunctionCall &call, const vector<Id> &argument_ids)
1394 if(argument_ids.size()<1)
1395 throw internal_error("invalid interpolate call");
1396 const VariableReference *var = dynamic_cast<const VariableReference *>(call.arguments[0].get());
1397 if(!var || !var->declaration || var->declaration->interface!="in")
1398 throw internal_error("invalid interpolate call");
1400 SpirVGlslStd450Opcode opcode;
1401 if(call.name=="interpolateAtCentroid")
1402 opcode = GLSL450_INTERPOLATE_AT_CENTROID;
1403 else if(call.name=="interpolateAtSample")
1404 opcode = GLSL450_INTERPOLATE_AT_SAMPLE;
1405 else if(call.name=="interpolateAtOffset")
1406 opcode = GLSL450_INTERPOLATE_AT_OFFSET;
1408 throw internal_error("invalid interpolate call");
1410 Id ext_id = import_extension("GLSL.std.450");
1411 r_expression_result_id = begin_expression(OP_EXT_INST, get_id(*call.type));
1412 writer.write(ext_id);
1413 writer.write(opcode);
1414 writer.write(get_id(*var->declaration));
1415 for(auto i=argument_ids.begin(); ++i!=argument_ids.end(); )
1417 end_expression(OP_EXT_INST);
1420 void SpirVGenerator::visit(ExpressionStatement &expr)
1422 expr.expression->visit(*this);
1425 void SpirVGenerator::visit(InterfaceLayout &layout)
1427 interface_layouts.push_back(&layout);
1430 bool SpirVGenerator::check_duplicate_type(TypeDeclaration &type)
1432 for(const auto &kvp: declared_ids)
1433 if(TypeDeclaration *type2 = dynamic_cast<TypeDeclaration *>(kvp.first))
1434 if(TypeComparer().apply(type, *type2))
1436 insert_unique(declared_ids, &type, kvp.second);
1443 bool SpirVGenerator::check_standard_type(BasicTypeDeclaration &basic)
1445 const BasicTypeDeclaration *elem = (basic.kind==BasicTypeDeclaration::VECTOR ?
1446 dynamic_cast<const BasicTypeDeclaration *>(basic.base_type) : &basic);
1447 if(!elem || elem->base_type)
1449 if((elem->kind==BasicTypeDeclaration::INT || elem->kind==BasicTypeDeclaration::FLOAT) && elem->size!=32)
1452 Id standard_id = get_standard_type_id(elem->kind, (basic.kind==BasicTypeDeclaration::VECTOR ? basic.size : 1), elem->sign);
1453 insert_unique(declared_ids, &basic, Declaration(standard_id, 0));
1454 writer.write_op_name(standard_id, basic.name);
1459 void SpirVGenerator::visit(BasicTypeDeclaration &basic)
1461 if(check_standard_type(basic))
1463 if(check_duplicate_type(basic))
1465 // Alias types shouldn't exist at this point and arrays are handled elsewhere
1466 if(basic.kind==BasicTypeDeclaration::ALIAS || basic.kind==BasicTypeDeclaration::ARRAY)
1469 Id type_id = allocate_id(basic, 0);
1470 writer.write_op_name(type_id, basic.name);
1474 case BasicTypeDeclaration::INT:
1475 writer.write_op(content.globals, OP_TYPE_INT, type_id, basic.size, basic.sign);
1477 case BasicTypeDeclaration::FLOAT:
1478 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, basic.size);
1480 case BasicTypeDeclaration::VECTOR:
1481 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, get_id(*basic.base_type), basic.size);
1483 case BasicTypeDeclaration::MATRIX:
1484 writer.write_op(content.globals, OP_TYPE_MATRIX, type_id, get_id(*basic.base_type), basic.size&0xFFFF);
1487 throw internal_error("unknown basic type");
1491 void SpirVGenerator::visit(ImageTypeDeclaration &image)
1493 if(check_duplicate_type(image))
1496 Id type_id = allocate_id(image, 0);
1498 Id image_id = (image.sampled ? next_id++ : type_id);
1499 writer.begin_op(content.globals, OP_TYPE_IMAGE, 9);
1500 writer.write(image_id);
1501 writer.write(get_id(*image.base_type));
1502 writer.write(image.dimensions-1);
1503 writer.write(image.shadow);
1504 writer.write(image.array);
1505 writer.write(false); // Multisample
1506 writer.write(image.sampled ? 1 : 2);
1507 writer.write(0); // Format (unknown)
1508 writer.end_op(OP_TYPE_IMAGE);
1512 writer.write_op_name(type_id, image.name);
1513 writer.write_op(content.globals, OP_TYPE_SAMPLED_IMAGE, type_id, image_id);
1514 insert_unique(image_type_ids, type_id, image_id);
1517 if(image.dimensions==ImageTypeDeclaration::ONE)
1518 use_capability(image.sampled ? CAP_SAMPLED_1D : CAP_IMAGE_1D);
1519 else if(image.dimensions==ImageTypeDeclaration::CUBE && image.array)
1520 use_capability(image.sampled ? CAP_SAMPLED_CUBE_ARRAY : CAP_IMAGE_CUBE_ARRAY);
1523 void SpirVGenerator::visit(StructDeclaration &strct)
1525 if(check_duplicate_type(strct))
1528 Id type_id = allocate_id(strct, 0);
1529 writer.write_op_name(type_id, strct.name);
1531 if(strct.interface_block)
1532 writer.write_op_decorate(type_id, DECO_BLOCK);
1534 bool builtin = (strct.interface_block && !strct.interface_block->block_name.compare(0, 3, "gl_"));
1535 vector<Id> member_type_ids;
1536 member_type_ids.reserve(strct.members.body.size());
1537 for(const RefPtr<Statement> &s: strct.members.body)
1539 const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(s.get());
1543 unsigned index = member_type_ids.size();
1544 member_type_ids.push_back(get_variable_type_id(*var));
1546 writer.write_op_member_name(type_id, index, var->name);
1550 BuiltinSemantic semantic = get_builtin_semantic(var->name);
1551 writer.write_op_member_decorate(type_id, index, DECO_BUILTIN, semantic);
1557 for(const Layout::Qualifier &q: var->layout->qualifiers)
1559 if(q.name=="offset")
1560 writer.write_op_member_decorate(type_id, index, DECO_OFFSET, q.value);
1561 else if(q.name=="column_major")
1562 writer.write_op_member_decorate(type_id, index, DECO_COL_MAJOR);
1563 else if(q.name=="row_major")
1564 writer.write_op_member_decorate(type_id, index, DECO_ROW_MAJOR);
1568 const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var->type_declaration);
1569 while(basic && basic->kind==BasicTypeDeclaration::ARRAY)
1570 basic = dynamic_cast<const BasicTypeDeclaration *>(basic->base_type);
1571 if(basic && basic->kind==BasicTypeDeclaration::MATRIX)
1573 unsigned stride = MemoryRequirementsCalculator().apply(*basic->base_type).stride;
1574 writer.write_op_member_decorate(type_id, index, DECO_MATRIX_STRIDE, stride);
1579 writer.begin_op(content.globals, OP_TYPE_STRUCT);
1580 writer.write(type_id);
1581 for(Id i: member_type_ids)
1583 writer.end_op(OP_TYPE_STRUCT);
1586 void SpirVGenerator::visit(VariableDeclaration &var)
1588 Id type_id = get_variable_type_id(var);
1593 if(!var.init_expression)
1594 throw internal_error("const variable without initializer");
1596 int spec_id = get_layout_value(var.layout.get(), "constant_id");
1597 Id *spec_var_id = (spec_id>=0 ? &declared_spec_ids[spec_id] : 0);
1598 if(spec_id>=0 && *spec_var_id)
1600 insert_unique(declared_ids, &var, Declaration(*spec_var_id, type_id));
1604 SetFlag set_const(constant_expression);
1605 SetFlag set_spec(spec_constant, spec_id>=0);
1606 r_expression_result_id = 0;
1607 var.init_expression->visit(*this);
1608 var_id = r_expression_result_id;
1609 insert_unique(declared_ids, &var, Declaration(var_id, type_id));
1612 writer.write_op_decorate(var_id, DECO_SPEC_ID, spec_id);
1613 *spec_var_id = var_id;
1618 StorageClass storage = (current_function ? STORAGE_FUNCTION : get_interface_storage(var.interface, false));
1619 Id ptr_type_id = get_pointer_type_id(type_id, storage);
1620 if(var.interface=="uniform")
1622 Id &uni_id = declared_uniform_ids["v"+var.name];
1625 insert_unique(declared_ids, &var, Declaration(uni_id, ptr_type_id));
1629 uni_id = var_id = allocate_id(var, ptr_type_id);
1632 var_id = allocate_id(var, (var.constant ? type_id : ptr_type_id));
1635 if(var.init_expression)
1637 SetFlag set_const(constant_expression, !current_function);
1638 r_expression_result_id = 0;
1639 r_constant_result = false;
1640 var.init_expression->visit(*this);
1641 init_id = r_expression_result_id;
1644 vector<Word> &target = (current_function ? content.locals : content.globals);
1645 writer.begin_op(target, OP_VARIABLE, 4+(init_id && !current_function));
1646 writer.write(ptr_type_id);
1647 writer.write(var_id);
1648 writer.write(storage);
1649 if(init_id && !current_function)
1650 writer.write(init_id);
1651 writer.end_op(OP_VARIABLE);
1655 for(const Layout::Qualifier &q: var.layout->qualifiers)
1657 if(q.name=="location")
1658 writer.write_op_decorate(var_id, DECO_LOCATION, q.value);
1659 else if(q.name=="set")
1660 writer.write_op_decorate(var_id, DECO_DESCRIPTOR_SET, q.value);
1661 else if(q.name=="binding")
1662 writer.write_op_decorate(var_id, DECO_BINDING, q.value);
1665 if(!var.name.compare(0, 3, "gl_"))
1667 BuiltinSemantic semantic = get_builtin_semantic(var.name);
1668 writer.write_op_decorate(var_id, DECO_BUILTIN, semantic);
1671 if(init_id && current_function)
1673 writer.write_op(content.function_body, OP_STORE, var_id, init_id);
1674 variable_load_ids[&var] = init_id;
1678 writer.write_op_name(var_id, var.name);
1681 void SpirVGenerator::visit(InterfaceBlock &iface)
1683 bool push_const = has_layout_qualifier(iface.layout.get(), "push_constant");
1685 StorageClass storage = (push_const ? STORAGE_PUSH_CONSTANT : get_interface_storage(iface.interface, true));
1688 type_id = get_array_type_id(*iface.struct_declaration, 0, true);
1690 type_id = get_id(*iface.struct_declaration);
1691 Id ptr_type_id = get_pointer_type_id(type_id, storage);
1694 if(iface.interface=="uniform")
1696 Id &uni_id = declared_uniform_ids["b"+iface.block_name];
1699 insert_unique(declared_ids, &iface, Declaration(uni_id, ptr_type_id));
1703 uni_id = block_id = allocate_id(iface, ptr_type_id);
1706 block_id = allocate_id(iface, ptr_type_id);
1707 writer.write_op_name(block_id, iface.instance_name);
1709 writer.write_op(content.globals, OP_VARIABLE, ptr_type_id, block_id, storage);
1713 for(const Layout::Qualifier &q: iface.layout->qualifiers)
1716 writer.write_op_decorate(block_id, DECO_DESCRIPTOR_SET, q.value);
1717 else if(q.name=="binding")
1718 writer.write_op_decorate(block_id, DECO_BINDING, q.value);
1723 void SpirVGenerator::visit_entry_point(FunctionDeclaration &func, Id func_id)
1725 writer.begin_op(content.entry_points, OP_ENTRY_POINT);
1728 case Stage::VERTEX: writer.write(0); break;
1729 case Stage::GEOMETRY: writer.write(3); break;
1730 case Stage::FRAGMENT: writer.write(4); break;
1731 default: throw internal_error("unknown stage");
1733 writer.write(func_id);
1734 writer.write_string(func.name);
1736 set<Node *> dependencies = DependencyCollector().apply(func);
1737 for(Node *n: dependencies)
1739 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(n))
1741 if(!var->interface.empty())
1742 writer.write(get_id(*n));
1744 else if(dynamic_cast<InterfaceBlock *>(n))
1745 writer.write(get_id(*n));
1748 writer.end_op(OP_ENTRY_POINT);
1750 if(stage->type==Stage::FRAGMENT)
1752 SpirVExecutionMode origin = (features.target_api==VULKAN ? EXEC_ORIGIN_UPPER_LEFT : EXEC_ORIGIN_LOWER_LEFT);
1753 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, origin);
1755 else if(stage->type==Stage::GEOMETRY)
1756 use_capability(CAP_GEOMETRY);
1758 for(const InterfaceLayout *i: interface_layouts)
1760 for(const Layout::Qualifier &q: i->layout.qualifiers)
1763 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id,
1764 (i->interface=="in" ? EXEC_INPUT_POINTS : EXEC_OUTPUT_POINTS));
1765 else if(q.name=="lines")
1766 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES);
1767 else if(q.name=="lines_adjacency")
1768 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES_ADJACENCY);
1769 else if(q.name=="triangles")
1770 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_TRIANGLES);
1771 else if(q.name=="triangles_adjacency")
1772 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_TRIANGLES_ADJACENCY);
1773 else if(q.name=="line_strip")
1774 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_LINE_STRIP);
1775 else if(q.name=="triangle_strip")
1776 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_TRIANGLE_STRIP);
1777 else if(q.name=="max_vertices")
1778 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_VERTICES, q.value);
1783 void SpirVGenerator::visit(FunctionDeclaration &func)
1785 if(func.source==BUILTIN_SOURCE)
1787 else if(func.definition!=&func)
1790 allocate_forward_id(*func.definition);
1794 Id return_type_id = get_id(*func.return_type_declaration);
1795 vector<unsigned> param_type_ids;
1796 param_type_ids.reserve(func.parameters.size());
1797 for(const RefPtr<VariableDeclaration> &p: func.parameters)
1798 param_type_ids.push_back(get_variable_type_id(*p));
1800 string sig_with_return = func.return_type+func.signature;
1801 Id &type_id = function_type_ids[sig_with_return];
1804 type_id = next_id++;
1805 writer.begin_op(content.globals, OP_TYPE_FUNCTION);
1806 writer.write(type_id);
1807 writer.write(return_type_id);
1808 for(unsigned i: param_type_ids)
1810 writer.end_op(OP_TYPE_FUNCTION);
1812 writer.write_op_name(type_id, sig_with_return);
1815 Id func_id = allocate_id(func, type_id);
1816 writer.write_op_name(func_id, func.name+func.signature);
1818 if(func.name=="main")
1819 visit_entry_point(func, func_id);
1821 writer.begin_op(content.functions, OP_FUNCTION, 5);
1822 writer.write(return_type_id);
1823 writer.write(func_id);
1824 writer.write(0); // Function control flags (none)
1825 writer.write(type_id);
1826 writer.end_op(OP_FUNCTION);
1828 for(unsigned i=0; i<func.parameters.size(); ++i)
1830 Id param_id = allocate_id(*func.parameters[i], param_type_ids[i]);
1831 writer.write_op(content.functions, OP_FUNCTION_PARAMETER, param_type_ids[i], param_id);
1832 // TODO This is probably incorrect if the parameter is assigned to.
1833 variable_load_ids[func.parameters[i].get()] = param_id;
1837 writer.begin_function_body(next_id++);
1838 SetForScope<FunctionDeclaration *> set_func(current_function, &func);
1839 func.body.visit(*this);
1841 if(writer.get_current_block())
1844 writer.write_op(content.function_body, OP_UNREACHABLE);
1847 const BasicTypeDeclaration *basic_return = dynamic_cast<const BasicTypeDeclaration *>(func.return_type_declaration);
1848 if(basic_return && basic_return->kind==BasicTypeDeclaration::VOID)
1849 writer.write_op(content.function_body, OP_RETURN);
1851 throw internal_error("missing return in non-void function");
1854 writer.end_function_body();
1855 variable_load_ids.clear();
1858 void SpirVGenerator::visit(Conditional &cond)
1860 cond.condition->visit(*this);
1862 Id true_label_id = next_id++;
1863 Id merge_block_id = next_id++;
1864 Id false_label_id = (cond.else_body.body.empty() ? merge_block_id : next_id++);
1865 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1866 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, true_label_id, false_label_id);
1868 std::map<const VariableDeclaration *, Id> saved_load_ids = variable_load_ids;
1870 writer.write_op_label(true_label_id);
1871 cond.body.visit(*this);
1872 if(writer.get_current_block())
1873 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1875 bool reachable_if_true = reachable;
1878 if(!cond.else_body.body.empty())
1880 swap(saved_load_ids, variable_load_ids);
1881 writer.write_op_label(false_label_id);
1882 cond.else_body.visit(*this);
1883 reachable |= reachable_if_true;
1886 writer.write_op_label(merge_block_id);
1887 prune_loads(true_label_id);
1890 void SpirVGenerator::visit(Iteration &iter)
1892 if(iter.init_statement)
1893 iter.init_statement->visit(*this);
1895 for(Node *n: AssignmentCollector().apply(iter))
1896 if(VariableDeclaration *var = dynamic_cast<VariableDeclaration *>(n))
1897 variable_load_ids.erase(var);
1899 Id header_id = next_id++;
1900 Id continue_id = next_id++;
1901 Id merge_block_id = next_id++;
1903 SetForScope<Id> set_merge(loop_merge_block_id, merge_block_id);
1904 SetForScope<Id> set_continue(loop_continue_target_id, continue_id);
1906 writer.write_op_label(header_id);
1907 writer.write_op(content.function_body, OP_LOOP_MERGE, merge_block_id, continue_id, 0); // Loop control (none)
1909 Id body_id = next_id++;
1912 writer.write_op_label(next_id++);
1913 iter.condition->visit(*this);
1914 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, body_id, merge_block_id);
1917 writer.write_op_label(body_id);
1918 iter.body.visit(*this);
1920 writer.write_op_label(continue_id);
1921 if(iter.loop_expression)
1922 iter.loop_expression->visit(*this);
1923 writer.write_op(content.function_body, OP_BRANCH, header_id);
1925 writer.write_op_label(merge_block_id);
1926 prune_loads(header_id);
1930 void SpirVGenerator::visit(Return &ret)
1934 ret.expression->visit(*this);
1935 writer.write_op(content.function_body, OP_RETURN_VALUE, r_expression_result_id);
1938 writer.write_op(content.function_body, OP_RETURN);
1942 void SpirVGenerator::visit(Jump &jump)
1944 if(jump.keyword=="discard")
1945 writer.write_op(content.function_body, OP_KILL);
1946 else if(jump.keyword=="break")
1947 writer.write_op(content.function_body, OP_BRANCH, loop_merge_block_id);
1948 else if(jump.keyword=="continue")
1949 writer.write_op(content.function_body, OP_BRANCH, loop_continue_target_id);
1951 throw internal_error("unknown jump");
1956 SpirVGenerator::TypeKey::TypeKey(BasicTypeDeclaration::Kind kind, bool sign):
1961 case BasicTypeDeclaration::VOID: detail = 'v'; break;
1962 case BasicTypeDeclaration::BOOL: detail = 'b'; break;
1963 case BasicTypeDeclaration::INT: detail = (sign ? 'i' : 'u'); break;
1964 case BasicTypeDeclaration::FLOAT: detail = 'f'; break;
1965 default: throw invalid_argument("TypeKey::TypeKey");
1969 bool SpirVGenerator::TypeKey::operator<(const TypeKey &other) const
1971 if(type_id!=other.type_id)
1972 return type_id<other.type_id;
1973 return detail<other.detail;
1977 bool SpirVGenerator::ConstantKey::operator<(const ConstantKey &other) const
1979 if(type_id!=other.type_id)
1980 return type_id<other.type_id;
1981 return int_value<other.int_value;