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)
140 use_capability(CAP_SHADER);
142 for(Stage &s: module.stages)
145 interface_layouts.clear();
146 s.content.visit(*this);
149 writer.finalize(SPIRV_GENERATOR_MSP, next_id);
152 SpirVGenerator::StorageClass SpirVGenerator::get_interface_storage(const string &iface, bool block)
155 return STORAGE_INPUT;
156 else if(iface=="out")
157 return STORAGE_OUTPUT;
158 else if(iface=="uniform")
159 return (block ? STORAGE_UNIFORM : STORAGE_UNIFORM_CONSTANT);
160 else if(iface.empty())
161 return STORAGE_PRIVATE;
163 throw invalid_argument("SpirVGenerator::get_interface_storage");
166 SpirVGenerator::BuiltinSemantic SpirVGenerator::get_builtin_semantic(const string &name)
168 if(name=="gl_Position")
169 return BUILTIN_POSITION;
170 else if(name=="gl_PointSize")
171 return BUILTIN_POINT_SIZE;
172 else if(name=="gl_ClipDistance")
173 return BUILTIN_CLIP_DISTANCE;
174 else if(name=="gl_VertexID")
175 return BUILTIN_VERTEX_ID;
176 else if(name=="gl_InstanceID")
177 return BUILTIN_INSTANCE_ID;
178 else if(name=="gl_PrimitiveID" || name=="gl_PrimitiveIDIn")
179 return BUILTIN_PRIMITIVE_ID;
180 else if(name=="gl_InvocationID")
181 return BUILTIN_INVOCATION_ID;
182 else if(name=="gl_Layer")
183 return BUILTIN_LAYER;
184 else if(name=="gl_FragCoord")
185 return BUILTIN_FRAG_COORD;
186 else if(name=="gl_PointCoord")
187 return BUILTIN_POINT_COORD;
188 else if(name=="gl_FrontFacing")
189 return BUILTIN_FRONT_FACING;
190 else if(name=="gl_SampleId")
191 return BUILTIN_SAMPLE_ID;
192 else if(name=="gl_SamplePosition")
193 return BUILTIN_SAMPLE_POSITION;
194 else if(name=="gl_FragDepth")
195 return BUILTIN_FRAG_DEPTH;
197 throw invalid_argument("SpirVGenerator::get_builtin_semantic");
200 void SpirVGenerator::use_capability(Capability cap)
202 if(used_capabilities.count(cap))
205 used_capabilities.insert(cap);
206 writer.write_op(content.capabilities, OP_CAPABILITY, cap);
209 SpirVGenerator::Id SpirVGenerator::import_extension(const string &name)
211 Id &ext_id = imported_extension_ids[name];
215 writer.begin_op(content.extensions, OP_EXT_INST_IMPORT);
216 writer.write(ext_id);
217 writer.write_string(name);
218 writer.end_op(OP_EXT_INST_IMPORT);
223 SpirVGenerator::Id SpirVGenerator::get_id(Node &node) const
225 return get_item(declared_ids, &node).id;
228 SpirVGenerator::Id SpirVGenerator::allocate_id(Node &node, Id type_id)
230 auto i = declared_ids.find(&node);
231 if(i!=declared_ids.end())
233 if(i->second.type_id)
234 throw key_error(&node);
235 i->second.type_id = type_id;
240 declared_ids.insert(make_pair(&node, Declaration(id, type_id)));
244 SpirVGenerator::Id SpirVGenerator::allocate_forward_id(Node &node)
246 auto i = declared_ids.find(&node);
247 if(i!=declared_ids.end())
251 declared_ids.insert(make_pair(&node, Declaration(id, 0)));
255 SpirVGenerator::Id SpirVGenerator::write_constant(Id type_id, Word value, bool spec)
257 Id const_id = next_id++;
258 if(is_scalar_type(type_id, BasicTypeDeclaration::BOOL))
260 Opcode opcode = (value ? (spec ? OP_SPEC_CONSTANT_TRUE : OP_CONSTANT_TRUE) :
261 (spec ? OP_SPEC_CONSTANT_FALSE : OP_CONSTANT_FALSE));
262 writer.write_op(content.globals, opcode, type_id, const_id);
266 Opcode opcode = (spec ? OP_SPEC_CONSTANT : OP_CONSTANT);
267 writer.write_op(content.globals, opcode, type_id, const_id, value);
272 SpirVGenerator::ConstantKey SpirVGenerator::get_constant_key(Id type_id, const Variant &value)
274 if(value.check_type<bool>())
275 return ConstantKey(type_id, value.value<bool>());
276 else if(value.check_type<int>())
277 return ConstantKey(type_id, value.value<int>());
278 else if(value.check_type<unsigned>())
279 return ConstantKey(type_id, value.value<unsigned>());
280 else if(value.check_type<float>())
281 return ConstantKey(type_id, value.value<float>());
283 throw invalid_argument("SpirVGenerator::get_constant_key");
286 SpirVGenerator::Id SpirVGenerator::get_constant_id(Id type_id, const Variant &value)
288 ConstantKey key = get_constant_key(type_id, value);
289 Id &const_id = constant_ids[key];
291 const_id = write_constant(type_id, key.int_value, false);
295 SpirVGenerator::Id SpirVGenerator::get_vector_constant_id(Id type_id, unsigned size, Id scalar_id)
297 Id &const_id = constant_ids[get_constant_key(type_id, static_cast<int>(scalar_id))];
300 const_id = next_id++;
301 writer.begin_op(content.globals, OP_CONSTANT_COMPOSITE, 3+size);
302 writer.write(type_id);
303 writer.write(const_id);
304 for(unsigned i=0; i<size; ++i)
305 writer.write(scalar_id);
306 writer.end_op(OP_CONSTANT_COMPOSITE);
311 SpirVGenerator::Id SpirVGenerator::get_standard_type_id(BasicTypeDeclaration::Kind kind, unsigned size, bool sign)
313 Id base_id = (size>1 ? get_standard_type_id(kind, 1, sign) : 0);
314 Id &type_id = standard_type_ids[base_id ? TypeKey(base_id, size) : TypeKey(kind, sign)];
319 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, base_id, size);
320 else if(kind==BasicTypeDeclaration::VOID)
321 writer.write_op(content.globals, OP_TYPE_VOID, type_id);
322 else if(kind==BasicTypeDeclaration::BOOL)
323 writer.write_op(content.globals, OP_TYPE_BOOL, type_id);
324 else if(kind==BasicTypeDeclaration::INT)
325 writer.write_op(content.globals, OP_TYPE_INT, type_id, 32, sign);
326 else if(kind==BasicTypeDeclaration::FLOAT)
327 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, 32);
329 throw invalid_argument("SpirVGenerator::get_standard_type_id");
334 bool SpirVGenerator::is_scalar_type(Id type_id, BasicTypeDeclaration::Kind kind) const
336 auto i = standard_type_ids.find(TypeKey(kind, true));
337 return (i!=standard_type_ids.end() && i->second==type_id);
340 SpirVGenerator::Id SpirVGenerator::get_array_type_id(TypeDeclaration &base_type, Id size_id)
342 Id base_type_id = get_id(base_type);
343 Id &array_type_id = array_type_ids[TypeKey(base_type_id, size_id)];
346 array_type_id = next_id++;
348 writer.write_op(content.globals, OP_TYPE_ARRAY, array_type_id, base_type_id, size_id);
350 writer.write_op(content.globals, OP_TYPE_RUNTIME_ARRAY, array_type_id, base_type_id);
352 unsigned stride = MemoryRequirementsCalculator().apply(base_type).stride;
353 writer.write_op_decorate(array_type_id, DECO_ARRAY_STRIDE, stride);
356 return array_type_id;
359 SpirVGenerator::Id SpirVGenerator::get_pointer_type_id(Id type_id, StorageClass storage)
361 Id &ptr_type_id = pointer_type_ids[TypeKey(type_id, storage)];
364 ptr_type_id = next_id++;
365 writer.write_op(content.globals, OP_TYPE_POINTER, ptr_type_id, storage, type_id);
370 SpirVGenerator::Id SpirVGenerator::get_variable_type_id(const VariableDeclaration &var)
372 if(const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var.type_declaration))
373 if(basic->kind==BasicTypeDeclaration::ARRAY)
378 SetFlag set_const(constant_expression);
379 r_expression_result_id = 0;
380 var.array_size->visit(*this);
381 size_id = r_expression_result_id;
384 size_id = get_constant_id(get_standard_type_id(BasicTypeDeclaration::INT, 1), 1);
385 return get_array_type_id(*basic->base_type, size_id);
388 return get_id(*var.type_declaration);
391 SpirVGenerator::Id SpirVGenerator::get_load_id(VariableDeclaration &var)
393 Id &load_result_id = variable_load_ids[&var];
396 load_result_id = next_id++;
397 writer.write_op(content.function_body, OP_LOAD, get_variable_type_id(var), load_result_id, get_id(var));
399 return load_result_id;
402 void SpirVGenerator::prune_loads(Id min_id)
404 for(auto i=variable_load_ids.begin(); i!=variable_load_ids.end(); )
406 if(i->second>=min_id)
407 variable_load_ids.erase(i++);
413 SpirVGenerator::Id SpirVGenerator::begin_expression(Opcode opcode, Id type_id, unsigned n_args)
415 bool has_result = (opcode==OP_FUNCTION_CALL || !is_scalar_type(type_id, BasicTypeDeclaration::VOID));
416 if(!constant_expression)
418 if(!current_function)
419 throw internal_error("non-constant expression outside a function");
421 writer.begin_op(content.function_body, opcode, (n_args ? 1+has_result*2+n_args : 0));
423 else if(opcode==OP_COMPOSITE_CONSTRUCT)
424 writer.begin_op(content.globals, (spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE),
425 (n_args ? 1+has_result*2+n_args : 0));
426 else if(!spec_constant)
427 throw internal_error("invalid non-specialization constant expression");
429 writer.begin_op(content.globals, OP_SPEC_CONSTANT_OP, (n_args ? 2+has_result*2+n_args : 0));
431 Id result_id = next_id++;
434 writer.write(type_id);
435 writer.write(result_id);
437 if(spec_constant && opcode!=OP_COMPOSITE_CONSTRUCT)
438 writer.write(opcode);
443 void SpirVGenerator::end_expression(Opcode opcode)
445 if(constant_expression)
446 opcode = (opcode==OP_COMPOSITE_CONSTRUCT ? spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE : OP_SPEC_CONSTANT_OP);
447 writer.end_op(opcode);
450 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id arg_id)
452 Id result_id = begin_expression(opcode, type_id, 1);
453 writer.write(arg_id);
454 end_expression(opcode);
458 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id left_id, Id right_id)
460 Id result_id = begin_expression(opcode, type_id, 2);
461 writer.write(left_id);
462 writer.write(right_id);
463 end_expression(opcode);
467 void SpirVGenerator::write_deconstruct(Id elem_type_id, Id composite_id, Id *elem_ids, unsigned n_elems)
469 for(unsigned i=0; i<n_elems; ++i)
471 elem_ids[i] = begin_expression(OP_COMPOSITE_EXTRACT, elem_type_id, 2);
472 writer.write(composite_id);
474 end_expression(OP_COMPOSITE_EXTRACT);
478 SpirVGenerator::Id SpirVGenerator::write_construct(Id type_id, const Id *elem_ids, unsigned n_elems)
480 Id result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, type_id, n_elems);
481 for(unsigned i=0; i<n_elems; ++i)
482 writer.write(elem_ids[i]);
483 end_expression(OP_COMPOSITE_CONSTRUCT);
488 void SpirVGenerator::visit(Block &block)
490 for(const RefPtr<Statement> &s: block.body)
494 void SpirVGenerator::visit(Literal &literal)
496 Id type_id = get_id(*literal.type);
498 r_expression_result_id = write_constant(type_id, get_constant_key(type_id, literal.value).int_value, true);
500 r_expression_result_id = get_constant_id(type_id, literal.value);
501 r_constant_result = true;
504 void SpirVGenerator::visit(VariableReference &var)
506 if(constant_expression || var.declaration->constant)
508 if(!var.declaration->constant)
509 throw internal_error("reference to non-constant variable in constant context");
511 r_expression_result_id = get_id(*var.declaration);
512 r_constant_result = true;
515 else if(!current_function)
516 throw internal_error("non-constant context outside a function");
518 r_constant_result = false;
521 r_expression_result_id = 0;
522 if(!assignment_source_id)
524 auto i = variable_load_ids.find(var.declaration);
525 if(i!=variable_load_ids.end())
526 r_expression_result_id = i->second;
528 if(!r_expression_result_id)
529 r_composite_base = var.declaration;
531 else if(assignment_source_id)
533 writer.write_op(content.function_body, OP_STORE, get_id(*var.declaration), assignment_source_id);
534 variable_load_ids[var.declaration] = assignment_source_id;
535 r_expression_result_id = assignment_source_id;
538 r_expression_result_id = get_load_id(*var.declaration);
541 void SpirVGenerator::visit(InterfaceBlockReference &iface)
543 if(!composite_access || !current_function)
544 throw internal_error("invalid interface block reference");
546 r_composite_base = iface.declaration;
547 r_expression_result_id = 0;
548 r_constant_result = false;
551 void SpirVGenerator::generate_composite_access(TypeDeclaration &result_type)
554 Id result_type_id = get_id(result_type);
555 Id access_type_id = result_type_id;
558 if(constant_expression)
559 throw internal_error("composite access through pointer in constant context");
561 Id int32_type_id = get_standard_type_id(BasicTypeDeclaration::INT, 1);
562 for(unsigned &i: r_composite_chain)
563 i = (i<0x400000 ? get_constant_id(int32_type_id, static_cast<int>(i)) : i&0x3FFFFF);
565 /* Find the storage class of the base and obtain appropriate pointer type
567 const Declaration &base_decl = get_item(declared_ids, r_composite_base);
568 auto i = pointer_type_ids.begin();
569 for(; (i!=pointer_type_ids.end() && i->second!=base_decl.type_id); ++i) ;
570 if(i==pointer_type_ids.end())
571 throw internal_error("could not find storage class");
572 access_type_id = get_pointer_type_id(result_type_id, static_cast<StorageClass>(i->first.detail));
574 opcode = OP_ACCESS_CHAIN;
576 else if(assignment_source_id)
577 throw internal_error("assignment to temporary composite");
580 for(unsigned &i: r_composite_chain)
581 for(auto j=constant_ids.begin(); (i>=0x400000 && j!=constant_ids.end()); ++j)
582 if(j->second==(i&0x3FFFFF))
583 i = j->first.int_value;
585 opcode = OP_COMPOSITE_EXTRACT;
588 Id access_id = begin_expression(opcode, access_type_id, 1+r_composite_chain.size());
589 writer.write(r_composite_base_id);
590 for(unsigned i: r_composite_chain)
592 end_expression(opcode);
594 r_constant_result = false;
597 if(assignment_source_id)
599 writer.write_op(content.function_body, OP_STORE, access_id, assignment_source_id);
600 r_expression_result_id = assignment_source_id;
603 r_expression_result_id = write_expression(OP_LOAD, result_type_id, access_id);
606 r_expression_result_id = access_id;
609 void SpirVGenerator::visit_composite(Expression &base_expr, unsigned index, TypeDeclaration &type)
611 if(!composite_access)
613 r_composite_base = 0;
614 r_composite_base_id = 0;
615 r_composite_chain.clear();
619 SetFlag set_composite(composite_access);
620 base_expr.visit(*this);
623 if(!r_composite_base_id)
624 r_composite_base_id = (r_composite_base ? get_id(*r_composite_base) : r_expression_result_id);
626 r_composite_chain.push_back(index);
627 if(!composite_access)
628 generate_composite_access(type);
630 r_expression_result_id = 0;
633 void SpirVGenerator::visit_isolated(Expression &expr)
635 SetForScope<Id> clear_assign(assignment_source_id, 0);
636 SetFlag clear_composite(composite_access, false);
637 SetForScope<Node *> clear_base(r_composite_base, 0);
638 SetForScope<Id> clear_base_id(r_composite_base_id, 0);
639 vector<unsigned> saved_chain;
640 swap(saved_chain, r_composite_chain);
642 swap(saved_chain, r_composite_chain);
645 void SpirVGenerator::visit(MemberAccess &memacc)
647 visit_composite(*memacc.left, memacc.index, *memacc.type);
650 void SpirVGenerator::visit(Swizzle &swizzle)
653 visit_composite(*swizzle.left, swizzle.components[0], *swizzle.type);
654 else if(assignment_source_id)
656 const BasicTypeDeclaration &basic = dynamic_cast<const BasicTypeDeclaration &>(*swizzle.left->type);
659 for(unsigned i=0; i<swizzle.count; ++i)
660 mask |= 1<<swizzle.components[i];
662 visit_isolated(*swizzle.left);
664 Id combined_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.left->type), 2+basic.size);
665 writer.write(r_expression_result_id);
666 writer.write(assignment_source_id);
667 for(unsigned i=0; i<basic.size; ++i)
668 writer.write(i+((mask>>i)&1)*basic.size);
669 end_expression(OP_VECTOR_SHUFFLE);
671 SetForScope<Id> set_assign(assignment_source_id, combined_id);
672 swizzle.left->visit(*this);
674 r_expression_result_id = combined_id;
678 swizzle.left->visit(*this);
679 Id left_id = r_expression_result_id;
681 r_expression_result_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.type), 2+swizzle.count);
682 writer.write(left_id);
683 writer.write(left_id);
684 for(unsigned i=0; i<swizzle.count; ++i)
685 writer.write(swizzle.components[i]);
686 end_expression(OP_VECTOR_SHUFFLE);
688 r_constant_result = false;
691 void SpirVGenerator::visit(UnaryExpression &unary)
694 return visit_isolated(unary);
696 unary.expression->visit(*this);
698 char oper = unary.oper->token[0];
699 char oper2 = unary.oper->token[1];
700 if(oper=='+' && !oper2)
703 BasicTypeDeclaration &basic = dynamic_cast<BasicTypeDeclaration &>(*unary.expression->type);
704 BasicTypeDeclaration &elem = *get_element_type(basic);
706 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
707 /* SPIR-V allows constant operations on floating-point values only for
709 throw internal_error("invalid operands for constant unary expression");
711 Id result_type_id = get_id(*unary.type);
712 Opcode opcode = OP_NOP;
714 r_constant_result = false;
716 opcode = OP_LOGICAL_NOT;
719 else if(oper=='-' && !oper2)
721 opcode = (elem.kind==BasicTypeDeclaration::INT ? OP_S_NEGATE : OP_F_NEGATE);
723 if(basic.kind==BasicTypeDeclaration::MATRIX)
725 Id column_type_id = get_id(*basic.base_type);
726 unsigned n_columns = basic.size&0xFFFF;
728 write_deconstruct(column_type_id, r_expression_result_id, column_ids, n_columns);
729 for(unsigned i=0; i<n_columns; ++i)
730 column_ids[i] = write_expression(opcode, column_type_id, column_ids[i]);
731 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
735 else if((oper=='+' || oper=='-') && oper2==oper)
737 if(constant_expression)
738 throw internal_error("increment or decrement in constant expression");
741 if(elem.kind==BasicTypeDeclaration::INT)
743 opcode = (oper=='+' ? OP_I_ADD : OP_I_SUB);
744 one_id = get_constant_id(get_id(elem), 1);
746 else if(elem.kind==BasicTypeDeclaration::FLOAT)
748 opcode = (oper=='+' ? OP_F_ADD : OP_F_SUB);
749 one_id = get_constant_id(get_id(elem), 1.0f);
752 throw internal_error("invalid increment/decrement");
754 if(basic.kind==BasicTypeDeclaration::VECTOR)
755 one_id = get_vector_constant_id(result_type_id, basic.size, one_id);
757 Id post_value_id = write_expression(opcode, result_type_id, r_expression_result_id, one_id);
759 SetForScope<Id> set_assign(assignment_source_id, post_value_id);
760 unary.expression->visit(*this);
762 r_expression_result_id = (unary.oper->type==Operator::POSTFIX ? r_expression_result_id : post_value_id);
767 throw internal_error("unknown unary operator");
769 r_expression_result_id = write_expression(opcode, result_type_id, r_expression_result_id);
772 void SpirVGenerator::visit(BinaryExpression &binary)
774 char oper = binary.oper->token[0];
777 visit_isolated(*binary.right);
778 return visit_composite(*binary.left, 0x400000|r_expression_result_id, *binary.type);
780 else if(composite_access)
781 return visit_isolated(binary);
783 if(assignment_source_id)
784 throw internal_error("invalid binary expression in assignment target");
786 BasicTypeDeclaration &basic_left = dynamic_cast<BasicTypeDeclaration &>(*binary.left->type);
787 BasicTypeDeclaration &basic_right = dynamic_cast<BasicTypeDeclaration &>(*binary.right->type);
788 // Expression resolver ensures that element types are the same
789 BasicTypeDeclaration &elem = *get_element_type(basic_left);
791 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
792 /* SPIR-V allows constant operations on floating-point values only for
794 throw internal_error("invalid operands for constant binary expression");
796 binary.left->visit(*this);
797 Id left_id = r_expression_result_id;
798 binary.right->visit(*this);
799 Id right_id = r_expression_result_id;
801 Id result_type_id = get_id(*binary.type);
802 Opcode opcode = OP_NOP;
803 bool swap_operands = false;
805 r_constant_result = false;
807 char oper2 = binary.oper->token[1];
808 if((oper=='<' || oper=='>') && oper2!=oper)
810 if(basic_left.kind==BasicTypeDeclaration::INT)
813 opcode = (oper=='<' ? (oper2=='=' ? OP_S_LESS_THAN_EQUAL : OP_S_LESS_THAN) :
814 (oper2=='=' ? OP_S_GREATER_THAN_EQUAL : OP_S_GREATER_THAN));
816 opcode = (oper=='<' ? (oper2=='=' ? OP_U_LESS_THAN_EQUAL : OP_U_LESS_THAN) :
817 (oper2=='=' ? OP_U_GREATER_THAN_EQUAL : OP_U_GREATER_THAN));
819 else if(basic_left.kind==BasicTypeDeclaration::FLOAT)
820 opcode = (oper=='<' ? (oper2=='=' ? OP_F_ORD_LESS_THAN_EQUAL : OP_F_ORD_LESS_THAN) :
821 (oper2=='=' ? OP_F_ORD_GREATER_THAN_EQUAL : OP_F_ORD_GREATER_THAN));
823 else if((oper=='=' || oper=='!') && oper2=='=')
825 if(elem.kind==BasicTypeDeclaration::BOOL)
826 opcode = (oper=='=' ? OP_LOGICAL_EQUAL : OP_LOGICAL_NOT_EQUAL);
827 else if(elem.kind==BasicTypeDeclaration::INT)
828 opcode = (oper=='=' ? OP_I_EQUAL : OP_I_NOT_EQUAL);
829 else if(elem.kind==BasicTypeDeclaration::FLOAT)
830 opcode = (oper=='=' ? OP_F_ORD_EQUAL : OP_F_ORD_NOT_EQUAL);
832 if(opcode!=OP_NOP && basic_left.base_type)
834 /* The SPIR-V equality operations produce component-wise results, but
835 GLSL operators return a single boolean. Use the any/all operations to
836 combine the results. */
837 Opcode combine_op = (oper=='!' ? OP_ANY : OP_ALL);
838 unsigned n_elems = basic_left.size&0xFFFF;
839 Id bool_vec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, n_elems);
842 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
843 compare_id = write_expression(opcode, bool_vec_type_id, left_id, right_id);
844 else if(basic_left.kind==BasicTypeDeclaration::MATRIX)
846 Id column_type_id = get_id(*basic_left.base_type);
848 write_deconstruct(column_type_id, left_id, column_ids, n_elems);
849 write_deconstruct(column_type_id, right_id, column_ids+4, n_elems);
851 Id column_bvec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, basic_left.size>>16);
852 for(unsigned i=0; i<n_elems; ++i)
854 compare_id = write_expression(opcode, column_bvec_type_id, column_ids[i], column_ids[4+i]);
855 column_ids[i] = write_expression(combine_op, result_type_id, compare_id);;
858 compare_id = write_construct(bool_vec_type_id, column_ids, n_elems);
862 r_expression_result_id = write_expression(combine_op, result_type_id, compare_id);
866 else if(oper2=='&' && elem.kind==BasicTypeDeclaration::BOOL)
867 opcode = OP_LOGICAL_AND;
868 else if(oper2=='|' && elem.kind==BasicTypeDeclaration::BOOL)
869 opcode = OP_LOGICAL_OR;
870 else if(oper2=='^' && elem.kind==BasicTypeDeclaration::BOOL)
871 opcode = OP_LOGICAL_NOT_EQUAL;
872 else if(oper=='&' && elem.kind==BasicTypeDeclaration::INT)
873 opcode = OP_BITWISE_AND;
874 else if(oper=='|' && elem.kind==BasicTypeDeclaration::INT)
875 opcode = OP_BITWISE_OR;
876 else if(oper=='^' && elem.kind==BasicTypeDeclaration::INT)
877 opcode = OP_BITWISE_XOR;
878 else if(oper=='<' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
879 opcode = OP_SHIFT_LEFT_LOGICAL;
880 else if(oper=='>' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
881 opcode = OP_SHIFT_RIGHT_ARITHMETIC;
882 else if(oper=='%' && elem.kind==BasicTypeDeclaration::INT)
883 opcode = (elem.sign ? OP_S_MOD : OP_U_MOD);
884 else if(oper=='+' || oper=='-' || oper=='*' || oper=='/')
886 Opcode elem_op = OP_NOP;
887 if(elem.kind==BasicTypeDeclaration::INT)
890 elem_op = (elem.sign ? OP_S_DIV : OP_U_DIV);
892 elem_op = (oper=='+' ? OP_I_ADD : oper=='-' ? OP_I_SUB : OP_I_MUL);
894 else if(elem.kind==BasicTypeDeclaration::FLOAT)
895 elem_op = (oper=='+' ? OP_F_ADD : oper=='-' ? OP_F_SUB : oper=='*' ? OP_F_MUL : OP_F_DIV);
897 if(oper=='*' && (basic_left.base_type || basic_right.base_type) && elem.kind==BasicTypeDeclaration::FLOAT)
899 /* Multiplication between floating-point vectors and matrices has
900 dedicated operations. */
901 if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
902 opcode = OP_MATRIX_TIMES_MATRIX;
903 else if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
905 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
906 opcode = OP_VECTOR_TIMES_MATRIX;
907 else if(basic_right.kind==BasicTypeDeclaration::VECTOR)
908 opcode = OP_MATRIX_TIMES_VECTOR;
911 opcode = OP_MATRIX_TIMES_SCALAR;
912 swap_operands = (basic_right.kind==BasicTypeDeclaration::MATRIX);
915 else if(basic_left.kind==BasicTypeDeclaration::VECTOR && basic_right.kind==BasicTypeDeclaration::VECTOR)
919 opcode = OP_VECTOR_TIMES_SCALAR;
920 swap_operands = (basic_right.kind==BasicTypeDeclaration::VECTOR);
923 else if((basic_left.base_type!=0)!=(basic_right.base_type!=0))
925 /* One operand is scalar and the other is a vector or a matrix.
926 Expand the scalar to a vector of appropriate size. */
927 Id &scalar_id = (basic_left.base_type ? right_id : left_id);
928 BasicTypeDeclaration *vector_type = (basic_left.base_type ? &basic_left : &basic_right);
929 if(vector_type->kind==BasicTypeDeclaration::MATRIX)
930 vector_type = dynamic_cast<BasicTypeDeclaration *>(vector_type->base_type);
931 Id vector_type_id = get_id(*vector_type);
933 Id expanded_id = begin_expression(OP_COMPOSITE_CONSTRUCT, vector_type_id, vector_type->size);
934 for(unsigned i=0; i<vector_type->size; ++i)
935 writer.write(scalar_id);
936 end_expression(OP_COMPOSITE_CONSTRUCT);
938 scalar_id = expanded_id;
940 if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
942 // Apply matrix operation column-wise.
943 Id matrix_id = (basic_left.base_type ? left_id : right_id);
946 unsigned n_columns = (basic_left.base_type ? basic_left.size : basic_right.size)&0xFFFF;
947 write_deconstruct(vector_type_id, matrix_id, column_ids, n_columns);
949 for(unsigned i=0; i<n_columns; ++i)
950 column_ids[i] = write_expression(elem_op, vector_type_id, column_ids[i], expanded_id);
952 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
958 else if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
961 throw internal_error("non-float matrix multiplication");
963 /* Other operations involving matrices need to be performed
965 Id column_type_id = get_id(*basic_left.base_type);
968 unsigned n_columns = basic_left.size&0xFFFF;
969 write_deconstruct(column_type_id, left_id, column_ids, n_columns);
970 write_deconstruct(column_type_id, right_id, column_ids+4, n_columns);
972 for(unsigned i=0; i<n_columns; ++i)
973 column_ids[i] = write_expression(elem_op, column_type_id, column_ids[i], column_ids[4+i]);
975 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
978 else if(basic_left.kind==basic_right.kind)
979 // Both operands are either scalars or vectors.
984 throw internal_error("unknown binary operator");
987 swap(left_id, right_id);
989 r_expression_result_id = write_expression(opcode, result_type_id, left_id, right_id);
992 void SpirVGenerator::visit(Assignment &assign)
994 if(assign.oper->token[0]!='=')
995 visit(static_cast<BinaryExpression &>(assign));
997 assign.right->visit(*this);
999 SetForScope<Id> set_assign(assignment_source_id, r_expression_result_id);
1000 assign.left->visit(*this);
1001 r_constant_result = false;
1004 void SpirVGenerator::visit(TernaryExpression &ternary)
1006 if(composite_access)
1007 return visit_isolated(ternary);
1008 if(constant_expression)
1010 ternary.condition->visit(*this);
1011 Id condition_id = r_expression_result_id;
1012 ternary.true_expr->visit(*this);
1013 Id true_result_id = r_expression_result_id;
1014 ternary.false_expr->visit(*this);
1015 Id false_result_id = r_expression_result_id;
1017 r_expression_result_id = begin_expression(OP_SELECT, get_id(*ternary.type), 3);
1018 writer.write(condition_id);
1019 writer.write(true_result_id);
1020 writer.write(false_result_id);
1021 end_expression(OP_SELECT);
1026 ternary.condition->visit(*this);
1027 Id condition_id = r_expression_result_id;
1029 Id true_label_id = next_id++;
1030 Id false_label_id = next_id++;
1031 Id merge_block_id = next_id++;
1032 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1033 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, condition_id, true_label_id, false_label_id);
1035 writer.write_op_label(true_label_id);
1036 ternary.true_expr->visit(*this);
1037 Id true_result_id = r_expression_result_id;
1038 true_label_id = writer.get_current_block();
1039 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1041 writer.write_op_label(false_label_id);
1042 ternary.false_expr->visit(*this);
1043 Id false_result_id = r_expression_result_id;
1044 false_label_id = writer.get_current_block();
1046 writer.write_op_label(merge_block_id);
1047 r_expression_result_id = begin_expression(OP_PHI, get_id(*ternary.type), 4);
1048 writer.write(true_result_id);
1049 writer.write(true_label_id);
1050 writer.write(false_result_id);
1051 writer.write(false_label_id);
1052 end_expression(OP_PHI);
1054 r_constant_result = false;
1057 void SpirVGenerator::visit(FunctionCall &call)
1059 if(assignment_source_id)
1060 throw internal_error("assignment to function call");
1061 else if(composite_access)
1062 return visit_isolated(call);
1063 else if(call.constructor && call.arguments.size()==1 && call.arguments[0]->type==call.type)
1064 return call.arguments[0]->visit(*this);
1066 vector<Id> argument_ids;
1067 argument_ids.reserve(call.arguments.size());
1068 bool all_args_const = true;
1069 for(const RefPtr<Expression> &a: call.arguments)
1072 argument_ids.push_back(r_expression_result_id);
1073 all_args_const &= r_constant_result;
1076 if(constant_expression && (!call.constructor || !all_args_const))
1077 throw internal_error("function call in constant expression");
1079 Id result_type_id = get_id(*call.type);
1080 r_constant_result = false;
1082 if(call.constructor)
1083 visit_constructor(call, argument_ids, all_args_const);
1084 else if(call.declaration->source==BUILTIN_SOURCE)
1087 for(const RefPtr<Expression> &a: call.arguments)
1088 if(BasicTypeDeclaration *basic_arg = dynamic_cast<BasicTypeDeclaration *>(a->type))
1090 BasicTypeDeclaration &elem_arg = *get_element_type(*basic_arg);
1091 switch(elem_arg.kind)
1093 case BasicTypeDeclaration::BOOL: arg_types += 'b'; break;
1094 case BasicTypeDeclaration::INT: arg_types += (elem_arg.sign ? 'i' : 'u'); break;
1095 case BasicTypeDeclaration::FLOAT: arg_types += 'f'; break;
1096 default: arg_types += '?';
1100 const BuiltinFunctionInfo *builtin_info;
1101 for(builtin_info=builtin_functions; builtin_info->function[0]; ++builtin_info)
1102 if(builtin_info->function==call.name && (!builtin_info->arg_types[0] || builtin_info->arg_types==arg_types))
1105 if(builtin_info->capability)
1106 use_capability(static_cast<Capability>(builtin_info->capability));
1108 if(builtin_info->opcode)
1111 if(builtin_info->extension[0])
1113 opcode = OP_EXT_INST;
1114 Id ext_id = import_extension(builtin_info->extension);
1116 r_expression_result_id = begin_expression(opcode, result_type_id);
1117 writer.write(ext_id);
1118 writer.write(builtin_info->opcode);
1122 opcode = static_cast<Opcode>(builtin_info->opcode);
1123 r_expression_result_id = begin_expression(opcode, result_type_id);
1126 for(unsigned i=0; i<call.arguments.size(); ++i)
1128 if(!builtin_info->arg_order[i] || builtin_info->arg_order[i]>argument_ids.size())
1129 throw internal_error("invalid builtin function info");
1130 writer.write(argument_ids[builtin_info->arg_order[i]-1]);
1133 end_expression(opcode);
1135 else if(builtin_info->handler)
1136 (this->*(builtin_info->handler))(call, argument_ids);
1138 throw internal_error("unknown builtin function "+call.name);
1142 r_expression_result_id = begin_expression(OP_FUNCTION_CALL, result_type_id, 1+call.arguments.size());
1143 writer.write(get_id(*call.declaration->definition));
1144 for(Id i: argument_ids)
1146 end_expression(OP_FUNCTION_CALL);
1148 // Any global variables the called function uses might have changed value
1149 set<Node *> dependencies = DependencyCollector().apply(*call.declaration->definition);
1150 for(Node *n: dependencies)
1151 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(n))
1152 variable_load_ids.erase(var);
1156 void SpirVGenerator::visit_constructor(FunctionCall &call, const vector<Id> &argument_ids, bool all_args_const)
1158 Id result_type_id = get_id(*call.type);
1160 BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(call.type);
1163 if(dynamic_cast<const StructDeclaration *>(call.type))
1164 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1166 throw internal_error("unconstructable type "+call.name);
1170 SetFlag set_const(constant_expression, constant_expression || all_args_const);
1172 BasicTypeDeclaration &elem = *get_element_type(*basic);
1173 BasicTypeDeclaration &basic_arg0 = dynamic_cast<BasicTypeDeclaration &>(*call.arguments[0]->type);
1174 BasicTypeDeclaration &elem_arg0 = *get_element_type(basic_arg0);
1176 if(basic->kind==BasicTypeDeclaration::MATRIX)
1178 Id col_type_id = get_id(*basic->base_type);
1179 unsigned n_columns = basic->size&0xFFFF;
1180 unsigned n_rows = basic->size>>16;
1183 if(call.arguments.size()==1)
1185 // Construct diagonal matrix from a single scalar.
1186 Id zero_id = get_constant_id(get_id(elem), 0.0f);
1187 for(unsigned i=0; i<n_columns; ++i)
1189 column_ids[i] = begin_expression(OP_COMPOSITE_CONSTRUCT, col_type_id, n_rows);
1190 for(unsigned j=0; j<n_rows; ++j)
1191 writer.write(j==i ? argument_ids[0] : zero_id);
1192 end_expression(OP_COMPOSITE_CONSTRUCT);
1196 // Construct a matrix from column vectors
1197 copy(argument_ids.begin(), argument_ids.begin()+n_columns, column_ids);
1199 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
1201 else if(basic->kind==BasicTypeDeclaration::VECTOR && (call.arguments.size()>1 || basic_arg0.kind!=BasicTypeDeclaration::VECTOR))
1203 /* There's either a single scalar argument or multiple arguments
1204 which make up the vector's components. */
1205 if(call.arguments.size()==1)
1207 r_expression_result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, result_type_id);
1208 for(unsigned i=0; i<basic->size; ++i)
1209 writer.write(argument_ids[0]);
1210 end_expression(OP_COMPOSITE_CONSTRUCT);
1213 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1215 else if(elem.kind==BasicTypeDeclaration::BOOL)
1217 if(constant_expression)
1218 throw internal_error("unconverted constant");
1220 // Conversion to boolean is implemented as comparing against zero.
1221 Id number_type_id = get_id(elem_arg0);
1222 Id zero_id = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ?
1223 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1224 if(basic_arg0.kind==BasicTypeDeclaration::VECTOR)
1225 zero_id = get_vector_constant_id(get_id(basic_arg0), basic_arg0.size, zero_id);
1227 Opcode opcode = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ? OP_F_ORD_NOT_EQUAL : OP_I_NOT_EQUAL);
1228 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0], zero_id);
1230 else if(elem_arg0.kind==BasicTypeDeclaration::BOOL)
1232 if(constant_expression)
1233 throw internal_error("unconverted constant");
1235 /* Conversion from boolean is implemented as selecting from zero
1237 Id number_type_id = get_id(elem);
1238 Id zero_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1239 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1240 Id one_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1241 get_constant_id(number_type_id, 1.0f) : get_constant_id(number_type_id, 1));
1242 if(basic->kind==BasicTypeDeclaration::VECTOR)
1244 zero_id = get_vector_constant_id(get_id(*basic), basic->size, zero_id);
1245 one_id = get_vector_constant_id(get_id(*basic), basic->size, one_id);
1248 r_expression_result_id = begin_expression(OP_SELECT, result_type_id, 3);
1249 writer.write(argument_ids[0]);
1250 writer.write(zero_id);
1251 writer.write(one_id);
1252 end_expression(OP_SELECT);
1256 if(constant_expression)
1257 throw internal_error("unconverted constant");
1259 // Scalar or vector conversion between types of equal size.
1261 if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::FLOAT)
1262 opcode = (elem.sign ? OP_CONVERT_F_TO_S : OP_CONVERT_F_TO_U);
1263 else if(elem.kind==BasicTypeDeclaration::FLOAT && elem_arg0.kind==BasicTypeDeclaration::INT)
1264 opcode = (elem_arg0.sign ? OP_CONVERT_S_TO_F : OP_CONVERT_U_TO_F);
1265 else if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::INT)
1266 opcode = OP_BITCAST;
1268 throw internal_error("invalid conversion");
1270 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0]);
1274 void SpirVGenerator::visit_builtin_matrix_comp_mult(FunctionCall &call, const vector<Id> &argument_ids)
1276 if(argument_ids.size()!=2)
1277 throw internal_error("invalid matrixCompMult call");
1279 const BasicTypeDeclaration &basic_arg0 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[0]->type);
1280 Id column_type_id = get_id(*basic_arg0.base_type);
1283 unsigned n_columns = basic_arg0.size&0xFFFF;
1284 write_deconstruct(column_type_id, argument_ids[0], column_ids, n_columns);
1285 write_deconstruct(column_type_id, argument_ids[1], column_ids+4, n_columns);
1287 for(unsigned i=0; i<n_columns; ++i)
1288 column_ids[i] = write_expression(OP_F_MUL, column_type_id, column_ids[i], column_ids[4+i]);
1290 r_expression_result_id = write_construct(get_id(*call.type), column_ids, n_columns);
1293 void SpirVGenerator::visit_builtin_texture_query(FunctionCall &call, const vector<Id> &argument_ids)
1295 if(argument_ids.size()<1)
1296 throw internal_error("invalid texture query call");
1299 if(call.name=="textureSize")
1300 opcode = OP_IMAGE_QUERY_SIZE_LOD;
1301 else if(call.name=="textureQueryLod")
1302 opcode = OP_IMAGE_QUERY_LOD;
1303 else if(call.name=="textureQueryLevels")
1304 opcode = OP_IMAGE_QUERY_LEVELS;
1306 throw internal_error("invalid texture query call");
1308 ImageTypeDeclaration &image_arg0 = dynamic_cast<ImageTypeDeclaration &>(*call.arguments[0]->type);
1311 if(image_arg0.sampled)
1313 Id image_type_id = get_item(image_type_ids, get_id(image_arg0));
1314 image_id = write_expression(OP_IMAGE, image_type_id, argument_ids[0]);
1317 image_id = argument_ids[0];
1319 Id result_type_id = get_id(*call.type);
1320 r_expression_result_id = begin_expression(opcode, result_type_id, argument_ids.size());
1321 writer.write(image_id);
1322 for(unsigned i=1; i<argument_ids.size(); ++i)
1323 writer.write(argument_ids[i]);
1324 end_expression(opcode);
1327 void SpirVGenerator::visit_builtin_texture(FunctionCall &call, const vector<Id> &argument_ids)
1329 if(argument_ids.size()<2)
1330 throw internal_error("invalid texture sampling call");
1332 bool explicit_lod = (stage->type!=Stage::FRAGMENT || call.name=="textureLod");
1333 Id lod_id = (!explicit_lod ? 0 : call.name=="textureLod" ? argument_ids.back() :
1334 get_constant_id(get_standard_type_id(BasicTypeDeclaration::FLOAT, 1), 0.0f));
1336 const ImageTypeDeclaration &image = dynamic_cast<const ImageTypeDeclaration &>(*call.arguments[0]->type);
1339 Id result_type_id = get_id(*call.type);
1343 if(argument_ids.size()==2)
1345 const BasicTypeDeclaration &basic_arg1 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[1]->type);
1346 dref_id = begin_expression(OP_COMPOSITE_EXTRACT, get_id(*basic_arg1.base_type), 2);
1347 writer.write(argument_ids.back());
1348 writer.write(basic_arg1.size-1);
1349 end_expression(OP_COMPOSITE_EXTRACT);
1352 dref_id = argument_ids[2];
1354 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_DREF_EXPLICIT_LOD : OP_IMAGE_SAMPLE_DREF_IMPLICIT_LOD);
1355 r_expression_result_id = begin_expression(opcode, result_type_id, 3+explicit_lod*2);
1359 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_EXPLICIT_LOD : OP_IMAGE_SAMPLE_IMPLICIT_LOD);
1360 r_expression_result_id = begin_expression(opcode, result_type_id, 2+explicit_lod*2);
1363 for(unsigned i=0; i<2; ++i)
1364 writer.write(argument_ids[i]);
1366 writer.write(dref_id);
1369 writer.write(2); // Lod
1370 writer.write(lod_id);
1373 end_expression(opcode);
1376 void SpirVGenerator::visit_builtin_texel_fetch(FunctionCall &call, const vector<Id> &argument_ids)
1378 if(argument_ids.size()!=3)
1379 throw internal_error("invalid texelFetch call");
1381 r_expression_result_id = begin_expression(OP_IMAGE_FETCH, get_id(*call.type), 4);
1382 for(unsigned i=0; i<2; ++i)
1383 writer.write(argument_ids[i]);
1384 writer.write(2); // Lod
1385 writer.write(argument_ids.back());
1386 end_expression(OP_IMAGE_FETCH);
1389 void SpirVGenerator::visit_builtin_interpolate(FunctionCall &call, const vector<Id> &argument_ids)
1391 if(argument_ids.size()<1)
1392 throw internal_error("invalid interpolate call");
1393 const VariableReference *var = dynamic_cast<const VariableReference *>(call.arguments[0].get());
1394 if(!var || !var->declaration || var->declaration->interface!="in")
1395 throw internal_error("invalid interpolate call");
1397 SpirVGlslStd450Opcode opcode;
1398 if(call.name=="interpolateAtCentroid")
1399 opcode = GLSL450_INTERPOLATE_AT_CENTROID;
1400 else if(call.name=="interpolateAtSample")
1401 opcode = GLSL450_INTERPOLATE_AT_SAMPLE;
1402 else if(call.name=="interpolateAtOffset")
1403 opcode = GLSL450_INTERPOLATE_AT_OFFSET;
1405 throw internal_error("invalid interpolate call");
1407 Id ext_id = import_extension("GLSL.std.450");
1408 r_expression_result_id = begin_expression(OP_EXT_INST, get_id(*call.type));
1409 writer.write(ext_id);
1410 writer.write(opcode);
1411 writer.write(get_id(*var->declaration));
1412 for(auto i=argument_ids.begin(); ++i!=argument_ids.end(); )
1414 end_expression(OP_EXT_INST);
1417 void SpirVGenerator::visit(ExpressionStatement &expr)
1419 expr.expression->visit(*this);
1422 void SpirVGenerator::visit(InterfaceLayout &layout)
1424 interface_layouts.push_back(&layout);
1427 bool SpirVGenerator::check_duplicate_type(TypeDeclaration &type)
1429 for(const auto &kvp: declared_ids)
1430 if(TypeDeclaration *type2 = dynamic_cast<TypeDeclaration *>(kvp.first))
1431 if(TypeComparer().apply(type, *type2))
1433 insert_unique(declared_ids, &type, kvp.second);
1440 bool SpirVGenerator::check_standard_type(BasicTypeDeclaration &basic)
1442 const BasicTypeDeclaration *elem = (basic.kind==BasicTypeDeclaration::VECTOR ?
1443 dynamic_cast<const BasicTypeDeclaration *>(basic.base_type) : &basic);
1444 if(!elem || elem->base_type)
1446 if((elem->kind==BasicTypeDeclaration::INT || elem->kind==BasicTypeDeclaration::FLOAT) && elem->size!=32)
1449 Id standard_id = get_standard_type_id(elem->kind, (basic.kind==BasicTypeDeclaration::VECTOR ? basic.size : 1), elem->sign);
1450 insert_unique(declared_ids, &basic, Declaration(standard_id, 0));
1451 writer.write_op_name(standard_id, basic.name);
1456 void SpirVGenerator::visit(BasicTypeDeclaration &basic)
1458 if(check_standard_type(basic))
1460 if(check_duplicate_type(basic))
1462 // Alias types shouldn't exist at this point and arrays are handled elsewhere
1463 if(basic.kind==BasicTypeDeclaration::ALIAS || basic.kind==BasicTypeDeclaration::ARRAY)
1466 Id type_id = allocate_id(basic, 0);
1467 writer.write_op_name(type_id, basic.name);
1471 case BasicTypeDeclaration::INT:
1472 writer.write_op(content.globals, OP_TYPE_INT, type_id, basic.size, basic.sign);
1474 case BasicTypeDeclaration::FLOAT:
1475 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, basic.size);
1477 case BasicTypeDeclaration::VECTOR:
1478 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, get_id(*basic.base_type), basic.size);
1480 case BasicTypeDeclaration::MATRIX:
1481 writer.write_op(content.globals, OP_TYPE_MATRIX, type_id, get_id(*basic.base_type), basic.size&0xFFFF);
1484 throw internal_error("unknown basic type");
1488 void SpirVGenerator::visit(ImageTypeDeclaration &image)
1490 if(check_duplicate_type(image))
1493 Id type_id = allocate_id(image, 0);
1495 Id image_id = (image.sampled ? next_id++ : type_id);
1496 writer.begin_op(content.globals, OP_TYPE_IMAGE, 9);
1497 writer.write(image_id);
1498 writer.write(get_id(*image.base_type));
1499 writer.write(image.dimensions-1);
1500 writer.write(image.shadow);
1501 writer.write(image.array);
1502 writer.write(false); // Multisample
1503 writer.write(image.sampled ? 1 : 2);
1504 writer.write(0); // Format (unknown)
1505 writer.end_op(OP_TYPE_IMAGE);
1509 writer.write_op_name(type_id, image.name);
1510 writer.write_op(content.globals, OP_TYPE_SAMPLED_IMAGE, type_id, image_id);
1511 insert_unique(image_type_ids, type_id, image_id);
1514 if(image.dimensions==ImageTypeDeclaration::ONE)
1515 use_capability(image.sampled ? CAP_SAMPLED_1D : CAP_IMAGE_1D);
1516 else if(image.dimensions==ImageTypeDeclaration::CUBE && image.array)
1517 use_capability(image.sampled ? CAP_SAMPLED_CUBE_ARRAY : CAP_IMAGE_CUBE_ARRAY);
1520 void SpirVGenerator::visit(StructDeclaration &strct)
1522 if(check_duplicate_type(strct))
1525 Id type_id = allocate_id(strct, 0);
1526 writer.write_op_name(type_id, strct.name);
1528 if(strct.interface_block)
1529 writer.write_op_decorate(type_id, DECO_BLOCK);
1531 bool builtin = (strct.interface_block && !strct.interface_block->block_name.compare(0, 3, "gl_"));
1532 vector<Id> member_type_ids;
1533 member_type_ids.reserve(strct.members.body.size());
1534 for(const RefPtr<Statement> &s: strct.members.body)
1536 const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(s.get());
1540 unsigned index = member_type_ids.size();
1541 member_type_ids.push_back(get_variable_type_id(*var));
1543 writer.write_op_member_name(type_id, index, var->name);
1547 BuiltinSemantic semantic = get_builtin_semantic(var->name);
1548 writer.write_op_member_decorate(type_id, index, DECO_BUILTIN, semantic);
1554 for(const Layout::Qualifier &q: var->layout->qualifiers)
1556 if(q.name=="offset")
1557 writer.write_op_member_decorate(type_id, index, DECO_OFFSET, q.value);
1558 else if(q.name=="column_major")
1559 writer.write_op_member_decorate(type_id, index, DECO_COL_MAJOR);
1560 else if(q.name=="row_major")
1561 writer.write_op_member_decorate(type_id, index, DECO_ROW_MAJOR);
1565 const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var->type_declaration);
1566 while(basic && basic->kind==BasicTypeDeclaration::ARRAY)
1567 basic = dynamic_cast<const BasicTypeDeclaration *>(basic->base_type);
1568 if(basic && basic->kind==BasicTypeDeclaration::MATRIX)
1570 unsigned stride = MemoryRequirementsCalculator().apply(*basic->base_type).stride;
1571 writer.write_op_member_decorate(type_id, index, DECO_MATRIX_STRIDE, stride);
1576 writer.begin_op(content.globals, OP_TYPE_STRUCT);
1577 writer.write(type_id);
1578 for(Id i: member_type_ids)
1580 writer.end_op(OP_TYPE_STRUCT);
1583 void SpirVGenerator::visit(VariableDeclaration &var)
1585 const vector<Layout::Qualifier> *layout_ql = (var.layout ? &var.layout->qualifiers : 0);
1590 auto i = find_member(*layout_ql, string("constant_id"), &Layout::Qualifier::name);
1591 if(i!=layout_ql->end())
1595 Id type_id = get_variable_type_id(var);
1600 if(!var.init_expression)
1601 throw internal_error("const variable without initializer");
1603 SetFlag set_const(constant_expression);
1604 SetFlag set_spec(spec_constant, spec_id>=0);
1605 r_expression_result_id = 0;
1606 var.init_expression->visit(*this);
1607 var_id = r_expression_result_id;
1608 insert_unique(declared_ids, &var, Declaration(var_id, type_id));
1609 writer.write_op_decorate(var_id, DECO_SPEC_ID, spec_id);
1611 /* It's unclear what should be done if a specialization constant is
1612 initialized with anything other than a literal. GLSL doesn't seem to
1613 prohibit that but SPIR-V says OpSpecConstantOp can't be updated via
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: *layout_ql)
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 const vector<Layout::Qualifier> *layout_ql = (iface.layout ? &iface.layout->qualifiers : 0);
1685 bool push_const = false;
1688 auto i = find_member(*layout_ql, string("push_constant"), &Layout::Qualifier::name);
1689 push_const = (i!=layout_ql->end());
1692 StorageClass storage = (push_const ? STORAGE_PUSH_CONSTANT : get_interface_storage(iface.interface, true));
1695 type_id = get_array_type_id(*iface.struct_declaration, 0);
1697 type_id = get_id(*iface.struct_declaration);
1698 Id ptr_type_id = get_pointer_type_id(type_id, storage);
1701 if(iface.interface=="uniform")
1703 Id &uni_id = declared_uniform_ids["b"+iface.block_name];
1706 insert_unique(declared_ids, &iface, Declaration(uni_id, ptr_type_id));
1710 uni_id = block_id = allocate_id(iface, ptr_type_id);
1713 block_id = allocate_id(iface, ptr_type_id);
1714 writer.write_op_name(block_id, iface.instance_name);
1716 writer.write_op(content.globals, OP_VARIABLE, ptr_type_id, block_id, storage);
1720 for(const Layout::Qualifier &q: *layout_ql)
1723 writer.write_op_decorate(block_id, DECO_DESCRIPTOR_SET, q.value);
1724 else if(q.name=="binding")
1725 writer.write_op_decorate(block_id, DECO_BINDING, q.value);
1730 void SpirVGenerator::visit_entry_point(FunctionDeclaration &func, Id func_id)
1732 writer.begin_op(content.entry_points, OP_ENTRY_POINT);
1735 case Stage::VERTEX: writer.write(0); break;
1736 case Stage::GEOMETRY: writer.write(3); break;
1737 case Stage::FRAGMENT: writer.write(4); break;
1738 default: throw internal_error("unknown stage");
1740 writer.write(func_id);
1741 writer.write_string(func.name);
1743 set<Node *> dependencies = DependencyCollector().apply(func);
1744 for(Node *n: dependencies)
1746 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(n))
1748 if(!var->interface.empty())
1749 writer.write(get_id(*n));
1751 else if(dynamic_cast<InterfaceBlock *>(n))
1752 writer.write(get_id(*n));
1755 writer.end_op(OP_ENTRY_POINT);
1757 if(stage->type==Stage::FRAGMENT)
1758 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_ORIGIN_LOWER_LEFT);
1759 else if(stage->type==Stage::GEOMETRY)
1760 use_capability(CAP_GEOMETRY);
1762 for(const InterfaceLayout *i: interface_layouts)
1764 for(const Layout::Qualifier &q: i->layout.qualifiers)
1767 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id,
1768 (i->interface=="in" ? EXEC_INPUT_POINTS : EXEC_OUTPUT_POINTS));
1769 else if(q.name=="lines")
1770 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES);
1771 else if(q.name=="lines_adjacency")
1772 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES_ADJACENCY);
1773 else if(q.name=="triangles")
1774 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_TRIANGLES);
1775 else if(q.name=="triangles_adjacency")
1776 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_TRIANGLES_ADJACENCY);
1777 else if(q.name=="line_strip")
1778 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_LINE_STRIP);
1779 else if(q.name=="triangle_strip")
1780 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_TRIANGLE_STRIP);
1781 else if(q.name=="max_vertices")
1782 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_VERTICES, q.value);
1787 void SpirVGenerator::visit(FunctionDeclaration &func)
1789 if(func.source==BUILTIN_SOURCE)
1791 else if(func.definition!=&func)
1794 allocate_forward_id(*func.definition);
1798 Id return_type_id = get_id(*func.return_type_declaration);
1799 vector<unsigned> param_type_ids;
1800 param_type_ids.reserve(func.parameters.size());
1801 for(const RefPtr<VariableDeclaration> &p: func.parameters)
1802 param_type_ids.push_back(get_variable_type_id(*p));
1804 string sig_with_return = func.return_type+func.signature;
1805 Id &type_id = function_type_ids[sig_with_return];
1808 type_id = next_id++;
1809 writer.begin_op(content.globals, OP_TYPE_FUNCTION);
1810 writer.write(type_id);
1811 writer.write(return_type_id);
1812 for(unsigned i: param_type_ids)
1814 writer.end_op(OP_TYPE_FUNCTION);
1816 writer.write_op_name(type_id, sig_with_return);
1819 Id func_id = allocate_id(func, type_id);
1820 writer.write_op_name(func_id, func.name+func.signature);
1822 if(func.name=="main")
1823 visit_entry_point(func, func_id);
1825 writer.begin_op(content.functions, OP_FUNCTION, 5);
1826 writer.write(return_type_id);
1827 writer.write(func_id);
1828 writer.write(0); // Function control flags (none)
1829 writer.write(type_id);
1830 writer.end_op(OP_FUNCTION);
1832 for(unsigned i=0; i<func.parameters.size(); ++i)
1834 Id param_id = allocate_id(*func.parameters[i], param_type_ids[i]);
1835 writer.write_op(content.functions, OP_FUNCTION_PARAMETER, param_type_ids[i], param_id);
1836 // TODO This is probably incorrect if the parameter is assigned to.
1837 variable_load_ids[func.parameters[i].get()] = param_id;
1841 writer.begin_function_body(next_id++);
1842 SetForScope<FunctionDeclaration *> set_func(current_function, &func);
1843 func.body.visit(*this);
1845 if(writer.get_current_block())
1848 writer.write_op(content.function_body, OP_UNREACHABLE);
1851 const BasicTypeDeclaration *basic_return = dynamic_cast<const BasicTypeDeclaration *>(func.return_type_declaration);
1852 if(basic_return && basic_return->kind==BasicTypeDeclaration::VOID)
1853 writer.write_op(content.function_body, OP_RETURN);
1855 throw internal_error("missing return in non-void function");
1858 writer.end_function_body();
1859 variable_load_ids.clear();
1862 void SpirVGenerator::visit(Conditional &cond)
1864 cond.condition->visit(*this);
1866 Id true_label_id = next_id++;
1867 Id merge_block_id = next_id++;
1868 Id false_label_id = (cond.else_body.body.empty() ? merge_block_id : next_id++);
1869 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1870 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, true_label_id, false_label_id);
1872 std::map<const VariableDeclaration *, Id> saved_load_ids = variable_load_ids;
1874 writer.write_op_label(true_label_id);
1875 cond.body.visit(*this);
1876 if(writer.get_current_block())
1877 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1879 bool reachable_if_true = reachable;
1882 if(!cond.else_body.body.empty())
1884 swap(saved_load_ids, variable_load_ids);
1885 writer.write_op_label(false_label_id);
1886 cond.else_body.visit(*this);
1887 reachable |= reachable_if_true;
1890 writer.write_op_label(merge_block_id);
1891 prune_loads(true_label_id);
1894 void SpirVGenerator::visit(Iteration &iter)
1896 if(iter.init_statement)
1897 iter.init_statement->visit(*this);
1899 for(Node *n: AssignmentCollector().apply(iter))
1900 if(VariableDeclaration *var = dynamic_cast<VariableDeclaration *>(n))
1901 variable_load_ids.erase(var);
1903 Id header_id = next_id++;
1904 Id continue_id = next_id++;
1905 Id merge_block_id = next_id++;
1907 SetForScope<Id> set_merge(loop_merge_block_id, merge_block_id);
1908 SetForScope<Id> set_continue(loop_continue_target_id, continue_id);
1910 writer.write_op_label(header_id);
1911 writer.write_op(content.function_body, OP_LOOP_MERGE, merge_block_id, continue_id, 0); // Loop control (none)
1913 Id body_id = next_id++;
1916 writer.write_op_label(next_id++);
1917 iter.condition->visit(*this);
1918 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, body_id, merge_block_id);
1921 writer.write_op_label(body_id);
1922 iter.body.visit(*this);
1924 writer.write_op_label(continue_id);
1925 if(iter.loop_expression)
1926 iter.loop_expression->visit(*this);
1927 writer.write_op(content.function_body, OP_BRANCH, header_id);
1929 writer.write_op_label(merge_block_id);
1930 prune_loads(header_id);
1934 void SpirVGenerator::visit(Return &ret)
1938 ret.expression->visit(*this);
1939 writer.write_op(content.function_body, OP_RETURN_VALUE, r_expression_result_id);
1942 writer.write_op(content.function_body, OP_RETURN);
1946 void SpirVGenerator::visit(Jump &jump)
1948 if(jump.keyword=="discard")
1949 writer.write_op(content.function_body, OP_KILL);
1950 else if(jump.keyword=="break")
1951 writer.write_op(content.function_body, OP_BRANCH, loop_merge_block_id);
1952 else if(jump.keyword=="continue")
1953 writer.write_op(content.function_body, OP_BRANCH, loop_continue_target_id);
1955 throw internal_error("unknown jump");
1960 SpirVGenerator::TypeKey::TypeKey(BasicTypeDeclaration::Kind kind, bool sign):
1965 case BasicTypeDeclaration::VOID: detail = 'v'; break;
1966 case BasicTypeDeclaration::BOOL: detail = 'b'; break;
1967 case BasicTypeDeclaration::INT: detail = (sign ? 'i' : 'u'); break;
1968 case BasicTypeDeclaration::FLOAT: detail = 'f'; break;
1969 default: throw invalid_argument("TypeKey::TypeKey");
1973 bool SpirVGenerator::TypeKey::operator<(const TypeKey &other) const
1975 if(type_id!=other.type_id)
1976 return type_id<other.type_id;
1977 return detail<other.detail;
1981 bool SpirVGenerator::ConstantKey::operator<(const ConstantKey &other) const
1983 if(type_id!=other.type_id)
1984 return type_id<other.type_id;
1985 return int_value<other.int_value;