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)
379 throw logic_error("array without size");
381 SetFlag set_const(constant_expression);
382 r_expression_result_id = 0;
383 var.array_size->visit(*this);
384 return get_array_type_id(*basic->base_type, r_expression_result_id, basic->extended_alignment);
387 return get_id(*var.type_declaration);
390 SpirVGenerator::Id SpirVGenerator::get_load_id(VariableDeclaration &var)
392 Id &load_result_id = variable_load_ids[&var];
395 load_result_id = next_id++;
396 writer.write_op(content.function_body, OP_LOAD, get_variable_type_id(var), load_result_id, get_id(var));
398 return load_result_id;
401 void SpirVGenerator::prune_loads(Id min_id)
403 for(auto i=variable_load_ids.begin(); i!=variable_load_ids.end(); )
405 if(i->second>=min_id)
406 variable_load_ids.erase(i++);
412 SpirVGenerator::Id SpirVGenerator::begin_expression(Opcode opcode, Id type_id, unsigned n_args)
414 bool has_result = (opcode==OP_FUNCTION_CALL || !is_scalar_type(type_id, BasicTypeDeclaration::VOID));
415 if(!constant_expression)
417 if(!current_function)
418 throw internal_error("non-constant expression outside a function");
420 writer.begin_op(content.function_body, opcode, (n_args ? 1+has_result*2+n_args : 0));
422 else if(opcode==OP_COMPOSITE_CONSTRUCT)
423 writer.begin_op(content.globals, (spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE),
424 (n_args ? 1+has_result*2+n_args : 0));
425 else if(!spec_constant)
426 throw internal_error("invalid non-specialization constant expression");
428 writer.begin_op(content.globals, OP_SPEC_CONSTANT_OP, (n_args ? 2+has_result*2+n_args : 0));
430 Id result_id = next_id++;
433 writer.write(type_id);
434 writer.write(result_id);
436 if(spec_constant && opcode!=OP_COMPOSITE_CONSTRUCT)
437 writer.write(opcode);
442 void SpirVGenerator::end_expression(Opcode opcode)
444 if(constant_expression)
445 opcode = (opcode==OP_COMPOSITE_CONSTRUCT ? spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE : OP_SPEC_CONSTANT_OP);
446 writer.end_op(opcode);
449 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id arg_id)
451 Id result_id = begin_expression(opcode, type_id, 1);
452 writer.write(arg_id);
453 end_expression(opcode);
457 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id left_id, Id right_id)
459 Id result_id = begin_expression(opcode, type_id, 2);
460 writer.write(left_id);
461 writer.write(right_id);
462 end_expression(opcode);
466 void SpirVGenerator::write_deconstruct(Id elem_type_id, Id composite_id, Id *elem_ids, unsigned n_elems)
468 for(unsigned i=0; i<n_elems; ++i)
470 elem_ids[i] = begin_expression(OP_COMPOSITE_EXTRACT, elem_type_id, 2);
471 writer.write(composite_id);
473 end_expression(OP_COMPOSITE_EXTRACT);
477 SpirVGenerator::Id SpirVGenerator::write_construct(Id type_id, const Id *elem_ids, unsigned n_elems)
479 Id result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, type_id, n_elems);
480 for(unsigned i=0; i<n_elems; ++i)
481 writer.write(elem_ids[i]);
482 end_expression(OP_COMPOSITE_CONSTRUCT);
487 void SpirVGenerator::visit(Block &block)
489 for(const RefPtr<Statement> &s: block.body)
493 void SpirVGenerator::visit(Literal &literal)
495 Id type_id = get_id(*literal.type);
497 r_expression_result_id = write_constant(type_id, get_constant_key(type_id, literal.value).int_value, true);
499 r_expression_result_id = get_constant_id(type_id, literal.value);
500 r_constant_result = true;
503 void SpirVGenerator::visit(VariableReference &var)
505 if(constant_expression || var.declaration->constant)
507 if(!var.declaration->constant)
508 throw internal_error("reference to non-constant variable in constant context");
510 r_expression_result_id = get_id(*var.declaration);
511 r_constant_result = true;
514 else if(!current_function)
515 throw internal_error("non-constant context outside a function");
517 r_constant_result = false;
520 r_expression_result_id = 0;
521 if(!assignment_source_id)
523 auto i = variable_load_ids.find(var.declaration);
524 if(i!=variable_load_ids.end())
525 r_expression_result_id = i->second;
527 if(!r_expression_result_id)
528 r_composite_base = var.declaration;
530 else if(assignment_source_id)
532 writer.write_op(content.function_body, OP_STORE, get_id(*var.declaration), assignment_source_id);
533 variable_load_ids[var.declaration] = assignment_source_id;
534 r_expression_result_id = assignment_source_id;
537 r_expression_result_id = get_load_id(*var.declaration);
540 void SpirVGenerator::generate_composite_access(TypeDeclaration &result_type)
543 Id result_type_id = get_id(result_type);
544 Id access_type_id = result_type_id;
547 if(constant_expression)
548 throw internal_error("composite access through pointer in constant context");
550 Id int32_type_id = get_standard_type_id(BasicTypeDeclaration::INT, 1);
551 for(unsigned &i: r_composite_chain)
552 i = (i<0x400000 ? get_constant_id(int32_type_id, static_cast<int>(i)) : i&0x3FFFFF);
554 /* Find the storage class of the base and obtain appropriate pointer type
556 const Declaration &base_decl = get_item(declared_ids, r_composite_base);
557 auto i = pointer_type_ids.begin();
558 for(; (i!=pointer_type_ids.end() && i->second!=base_decl.type_id); ++i) ;
559 if(i==pointer_type_ids.end())
560 throw internal_error("could not find storage class");
561 access_type_id = get_pointer_type_id(result_type_id, static_cast<StorageClass>(i->first.detail));
563 opcode = OP_ACCESS_CHAIN;
565 else if(assignment_source_id)
566 throw internal_error("assignment to temporary composite");
569 for(unsigned &i: r_composite_chain)
570 for(auto j=constant_ids.begin(); (i>=0x400000 && j!=constant_ids.end()); ++j)
571 if(j->second==(i&0x3FFFFF))
572 i = j->first.int_value;
574 opcode = OP_COMPOSITE_EXTRACT;
577 Id access_id = begin_expression(opcode, access_type_id, 1+r_composite_chain.size());
578 writer.write(r_composite_base_id);
579 for(unsigned i: r_composite_chain)
581 end_expression(opcode);
583 r_constant_result = false;
586 if(assignment_source_id)
588 writer.write_op(content.function_body, OP_STORE, access_id, assignment_source_id);
589 r_expression_result_id = assignment_source_id;
592 r_expression_result_id = write_expression(OP_LOAD, result_type_id, access_id);
595 r_expression_result_id = access_id;
598 void SpirVGenerator::visit_composite(Expression &base_expr, unsigned index, TypeDeclaration &type)
600 if(!composite_access)
602 r_composite_base = 0;
603 r_composite_base_id = 0;
604 r_composite_chain.clear();
608 SetFlag set_composite(composite_access);
609 base_expr.visit(*this);
612 if(!r_composite_base_id)
613 r_composite_base_id = (r_composite_base ? get_id(*r_composite_base) : r_expression_result_id);
615 r_composite_chain.push_back(index);
616 if(!composite_access)
617 generate_composite_access(type);
619 r_expression_result_id = 0;
622 void SpirVGenerator::visit_isolated(Expression &expr)
624 SetForScope<Id> clear_assign(assignment_source_id, 0);
625 SetFlag clear_composite(composite_access, false);
626 SetForScope<Node *> clear_base(r_composite_base, 0);
627 SetForScope<Id> clear_base_id(r_composite_base_id, 0);
628 vector<unsigned> saved_chain;
629 swap(saved_chain, r_composite_chain);
631 swap(saved_chain, r_composite_chain);
634 void SpirVGenerator::visit(MemberAccess &memacc)
636 visit_composite(*memacc.left, memacc.index, *memacc.type);
639 void SpirVGenerator::visit(Swizzle &swizzle)
642 visit_composite(*swizzle.left, swizzle.components[0], *swizzle.type);
643 else if(assignment_source_id)
645 const BasicTypeDeclaration &basic = dynamic_cast<const BasicTypeDeclaration &>(*swizzle.left->type);
648 for(unsigned i=0; i<swizzle.count; ++i)
649 mask |= 1<<swizzle.components[i];
651 visit_isolated(*swizzle.left);
653 Id combined_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.left->type), 2+basic.size);
654 writer.write(r_expression_result_id);
655 writer.write(assignment_source_id);
656 for(unsigned i=0; i<basic.size; ++i)
657 writer.write(i+((mask>>i)&1)*basic.size);
658 end_expression(OP_VECTOR_SHUFFLE);
660 SetForScope<Id> set_assign(assignment_source_id, combined_id);
661 swizzle.left->visit(*this);
663 r_expression_result_id = combined_id;
667 swizzle.left->visit(*this);
668 Id left_id = r_expression_result_id;
670 r_expression_result_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.type), 2+swizzle.count);
671 writer.write(left_id);
672 writer.write(left_id);
673 for(unsigned i=0; i<swizzle.count; ++i)
674 writer.write(swizzle.components[i]);
675 end_expression(OP_VECTOR_SHUFFLE);
677 r_constant_result = false;
680 void SpirVGenerator::visit(UnaryExpression &unary)
683 return visit_isolated(unary);
685 unary.expression->visit(*this);
687 char oper = unary.oper->token[0];
688 char oper2 = unary.oper->token[1];
689 if(oper=='+' && !oper2)
692 BasicTypeDeclaration &basic = dynamic_cast<BasicTypeDeclaration &>(*unary.expression->type);
693 BasicTypeDeclaration &elem = *get_element_type(basic);
695 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
696 /* SPIR-V allows constant operations on floating-point values only for
698 throw internal_error("invalid operands for constant unary expression");
700 Id result_type_id = get_id(*unary.type);
701 Opcode opcode = OP_NOP;
703 r_constant_result = false;
705 opcode = OP_LOGICAL_NOT;
708 else if(oper=='-' && !oper2)
710 opcode = (elem.kind==BasicTypeDeclaration::INT ? OP_S_NEGATE : OP_F_NEGATE);
712 if(basic.kind==BasicTypeDeclaration::MATRIX)
714 Id column_type_id = get_id(*basic.base_type);
715 unsigned n_columns = basic.size&0xFFFF;
717 write_deconstruct(column_type_id, r_expression_result_id, column_ids, n_columns);
718 for(unsigned i=0; i<n_columns; ++i)
719 column_ids[i] = write_expression(opcode, column_type_id, column_ids[i]);
720 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
724 else if((oper=='+' || oper=='-') && oper2==oper)
726 if(constant_expression)
727 throw internal_error("increment or decrement in constant expression");
730 if(elem.kind==BasicTypeDeclaration::INT)
732 opcode = (oper=='+' ? OP_I_ADD : OP_I_SUB);
733 one_id = get_constant_id(get_id(elem), 1);
735 else if(elem.kind==BasicTypeDeclaration::FLOAT)
737 opcode = (oper=='+' ? OP_F_ADD : OP_F_SUB);
738 one_id = get_constant_id(get_id(elem), 1.0f);
741 throw internal_error("invalid increment/decrement");
743 if(basic.kind==BasicTypeDeclaration::VECTOR)
744 one_id = get_vector_constant_id(result_type_id, basic.size, one_id);
746 Id post_value_id = write_expression(opcode, result_type_id, r_expression_result_id, one_id);
748 SetForScope<Id> set_assign(assignment_source_id, post_value_id);
749 unary.expression->visit(*this);
751 r_expression_result_id = (unary.oper->type==Operator::POSTFIX ? r_expression_result_id : post_value_id);
756 throw internal_error("unknown unary operator");
758 r_expression_result_id = write_expression(opcode, result_type_id, r_expression_result_id);
761 void SpirVGenerator::visit(BinaryExpression &binary)
763 char oper = binary.oper->token[0];
766 visit_isolated(*binary.right);
767 return visit_composite(*binary.left, 0x400000|r_expression_result_id, *binary.type);
769 else if(composite_access)
770 return visit_isolated(binary);
772 if(assignment_source_id)
773 throw internal_error("invalid binary expression in assignment target");
775 BasicTypeDeclaration &basic_left = dynamic_cast<BasicTypeDeclaration &>(*binary.left->type);
776 BasicTypeDeclaration &basic_right = dynamic_cast<BasicTypeDeclaration &>(*binary.right->type);
777 // Expression resolver ensures that element types are the same
778 BasicTypeDeclaration &elem = *get_element_type(basic_left);
780 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
781 /* SPIR-V allows constant operations on floating-point values only for
783 throw internal_error("invalid operands for constant binary expression");
785 binary.left->visit(*this);
786 Id left_id = r_expression_result_id;
787 binary.right->visit(*this);
788 Id right_id = r_expression_result_id;
790 Id result_type_id = get_id(*binary.type);
791 Opcode opcode = OP_NOP;
792 bool swap_operands = false;
794 r_constant_result = false;
796 char oper2 = binary.oper->token[1];
797 if((oper=='<' || oper=='>') && oper2!=oper)
799 if(basic_left.kind==BasicTypeDeclaration::INT)
802 opcode = (oper=='<' ? (oper2=='=' ? OP_S_LESS_THAN_EQUAL : OP_S_LESS_THAN) :
803 (oper2=='=' ? OP_S_GREATER_THAN_EQUAL : OP_S_GREATER_THAN));
805 opcode = (oper=='<' ? (oper2=='=' ? OP_U_LESS_THAN_EQUAL : OP_U_LESS_THAN) :
806 (oper2=='=' ? OP_U_GREATER_THAN_EQUAL : OP_U_GREATER_THAN));
808 else if(basic_left.kind==BasicTypeDeclaration::FLOAT)
809 opcode = (oper=='<' ? (oper2=='=' ? OP_F_ORD_LESS_THAN_EQUAL : OP_F_ORD_LESS_THAN) :
810 (oper2=='=' ? OP_F_ORD_GREATER_THAN_EQUAL : OP_F_ORD_GREATER_THAN));
812 else if((oper=='=' || oper=='!') && oper2=='=')
814 if(elem.kind==BasicTypeDeclaration::BOOL)
815 opcode = (oper=='=' ? OP_LOGICAL_EQUAL : OP_LOGICAL_NOT_EQUAL);
816 else if(elem.kind==BasicTypeDeclaration::INT)
817 opcode = (oper=='=' ? OP_I_EQUAL : OP_I_NOT_EQUAL);
818 else if(elem.kind==BasicTypeDeclaration::FLOAT)
819 opcode = (oper=='=' ? OP_F_ORD_EQUAL : OP_F_ORD_NOT_EQUAL);
821 if(opcode!=OP_NOP && basic_left.base_type)
823 /* The SPIR-V equality operations produce component-wise results, but
824 GLSL operators return a single boolean. Use the any/all operations to
825 combine the results. */
826 Opcode combine_op = (oper=='!' ? OP_ANY : OP_ALL);
827 unsigned n_elems = basic_left.size&0xFFFF;
828 Id bool_vec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, n_elems);
831 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
832 compare_id = write_expression(opcode, bool_vec_type_id, left_id, right_id);
833 else if(basic_left.kind==BasicTypeDeclaration::MATRIX)
835 Id column_type_id = get_id(*basic_left.base_type);
837 write_deconstruct(column_type_id, left_id, column_ids, n_elems);
838 write_deconstruct(column_type_id, right_id, column_ids+4, n_elems);
840 Id column_bvec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, basic_left.size>>16);
841 for(unsigned i=0; i<n_elems; ++i)
843 compare_id = write_expression(opcode, column_bvec_type_id, column_ids[i], column_ids[4+i]);
844 column_ids[i] = write_expression(combine_op, result_type_id, compare_id);;
847 compare_id = write_construct(bool_vec_type_id, column_ids, n_elems);
851 r_expression_result_id = write_expression(combine_op, result_type_id, compare_id);
855 else if(oper2=='&' && elem.kind==BasicTypeDeclaration::BOOL)
856 opcode = OP_LOGICAL_AND;
857 else if(oper2=='|' && elem.kind==BasicTypeDeclaration::BOOL)
858 opcode = OP_LOGICAL_OR;
859 else if(oper2=='^' && elem.kind==BasicTypeDeclaration::BOOL)
860 opcode = OP_LOGICAL_NOT_EQUAL;
861 else if(oper=='&' && elem.kind==BasicTypeDeclaration::INT)
862 opcode = OP_BITWISE_AND;
863 else if(oper=='|' && elem.kind==BasicTypeDeclaration::INT)
864 opcode = OP_BITWISE_OR;
865 else if(oper=='^' && elem.kind==BasicTypeDeclaration::INT)
866 opcode = OP_BITWISE_XOR;
867 else if(oper=='<' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
868 opcode = OP_SHIFT_LEFT_LOGICAL;
869 else if(oper=='>' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
870 opcode = OP_SHIFT_RIGHT_ARITHMETIC;
871 else if(oper=='%' && elem.kind==BasicTypeDeclaration::INT)
872 opcode = (elem.sign ? OP_S_MOD : OP_U_MOD);
873 else if(oper=='+' || oper=='-' || oper=='*' || oper=='/')
875 Opcode elem_op = OP_NOP;
876 if(elem.kind==BasicTypeDeclaration::INT)
879 elem_op = (elem.sign ? OP_S_DIV : OP_U_DIV);
881 elem_op = (oper=='+' ? OP_I_ADD : oper=='-' ? OP_I_SUB : OP_I_MUL);
883 else if(elem.kind==BasicTypeDeclaration::FLOAT)
884 elem_op = (oper=='+' ? OP_F_ADD : oper=='-' ? OP_F_SUB : oper=='*' ? OP_F_MUL : OP_F_DIV);
886 if(oper=='*' && (basic_left.base_type || basic_right.base_type) && elem.kind==BasicTypeDeclaration::FLOAT)
888 /* Multiplication between floating-point vectors and matrices has
889 dedicated operations. */
890 if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
891 opcode = OP_MATRIX_TIMES_MATRIX;
892 else if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
894 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
895 opcode = OP_VECTOR_TIMES_MATRIX;
896 else if(basic_right.kind==BasicTypeDeclaration::VECTOR)
897 opcode = OP_MATRIX_TIMES_VECTOR;
900 opcode = OP_MATRIX_TIMES_SCALAR;
901 swap_operands = (basic_right.kind==BasicTypeDeclaration::MATRIX);
904 else if(basic_left.kind==BasicTypeDeclaration::VECTOR && basic_right.kind==BasicTypeDeclaration::VECTOR)
908 opcode = OP_VECTOR_TIMES_SCALAR;
909 swap_operands = (basic_right.kind==BasicTypeDeclaration::VECTOR);
912 else if((basic_left.base_type!=0)!=(basic_right.base_type!=0))
914 /* One operand is scalar and the other is a vector or a matrix.
915 Expand the scalar to a vector of appropriate size. */
916 Id &scalar_id = (basic_left.base_type ? right_id : left_id);
917 BasicTypeDeclaration *vector_type = (basic_left.base_type ? &basic_left : &basic_right);
918 if(vector_type->kind==BasicTypeDeclaration::MATRIX)
919 vector_type = dynamic_cast<BasicTypeDeclaration *>(vector_type->base_type);
920 Id vector_type_id = get_id(*vector_type);
922 Id expanded_id = begin_expression(OP_COMPOSITE_CONSTRUCT, vector_type_id, vector_type->size);
923 for(unsigned i=0; i<vector_type->size; ++i)
924 writer.write(scalar_id);
925 end_expression(OP_COMPOSITE_CONSTRUCT);
927 scalar_id = expanded_id;
929 if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
931 // Apply matrix operation column-wise.
932 Id matrix_id = (basic_left.base_type ? left_id : right_id);
935 unsigned n_columns = (basic_left.base_type ? basic_left.size : basic_right.size)&0xFFFF;
936 write_deconstruct(vector_type_id, matrix_id, column_ids, n_columns);
938 for(unsigned i=0; i<n_columns; ++i)
939 column_ids[i] = write_expression(elem_op, vector_type_id, column_ids[i], expanded_id);
941 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
947 else if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
950 throw internal_error("non-float matrix multiplication");
952 /* Other operations involving matrices need to be performed
954 Id column_type_id = get_id(*basic_left.base_type);
957 unsigned n_columns = basic_left.size&0xFFFF;
958 write_deconstruct(column_type_id, left_id, column_ids, n_columns);
959 write_deconstruct(column_type_id, right_id, column_ids+4, n_columns);
961 for(unsigned i=0; i<n_columns; ++i)
962 column_ids[i] = write_expression(elem_op, column_type_id, column_ids[i], column_ids[4+i]);
964 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
967 else if(basic_left.kind==basic_right.kind)
968 // Both operands are either scalars or vectors.
973 throw internal_error("unknown binary operator");
976 swap(left_id, right_id);
978 r_expression_result_id = write_expression(opcode, result_type_id, left_id, right_id);
981 void SpirVGenerator::visit(Assignment &assign)
983 if(assign.oper->token[0]!='=')
984 visit(static_cast<BinaryExpression &>(assign));
986 assign.right->visit(*this);
988 SetForScope<Id> set_assign(assignment_source_id, r_expression_result_id);
989 assign.left->visit(*this);
990 r_constant_result = false;
993 void SpirVGenerator::visit(TernaryExpression &ternary)
996 return visit_isolated(ternary);
997 if(constant_expression)
999 ternary.condition->visit(*this);
1000 Id condition_id = r_expression_result_id;
1001 ternary.true_expr->visit(*this);
1002 Id true_result_id = r_expression_result_id;
1003 ternary.false_expr->visit(*this);
1004 Id false_result_id = r_expression_result_id;
1006 r_expression_result_id = begin_expression(OP_SELECT, get_id(*ternary.type), 3);
1007 writer.write(condition_id);
1008 writer.write(true_result_id);
1009 writer.write(false_result_id);
1010 end_expression(OP_SELECT);
1015 ternary.condition->visit(*this);
1016 Id condition_id = r_expression_result_id;
1018 Id true_label_id = next_id++;
1019 Id false_label_id = next_id++;
1020 Id merge_block_id = next_id++;
1021 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1022 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, condition_id, true_label_id, false_label_id);
1024 writer.write_op_label(true_label_id);
1025 ternary.true_expr->visit(*this);
1026 Id true_result_id = r_expression_result_id;
1027 true_label_id = writer.get_current_block();
1028 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1030 writer.write_op_label(false_label_id);
1031 ternary.false_expr->visit(*this);
1032 Id false_result_id = r_expression_result_id;
1033 false_label_id = writer.get_current_block();
1035 writer.write_op_label(merge_block_id);
1036 r_expression_result_id = begin_expression(OP_PHI, get_id(*ternary.type), 4);
1037 writer.write(true_result_id);
1038 writer.write(true_label_id);
1039 writer.write(false_result_id);
1040 writer.write(false_label_id);
1041 end_expression(OP_PHI);
1043 r_constant_result = false;
1046 void SpirVGenerator::visit(FunctionCall &call)
1048 if(assignment_source_id)
1049 throw internal_error("assignment to function call");
1050 else if(composite_access)
1051 return visit_isolated(call);
1052 else if(call.constructor && call.arguments.size()==1 && call.arguments[0]->type==call.type)
1053 return call.arguments[0]->visit(*this);
1055 vector<Id> argument_ids;
1056 argument_ids.reserve(call.arguments.size());
1057 bool all_args_const = true;
1058 for(const RefPtr<Expression> &a: call.arguments)
1061 argument_ids.push_back(r_expression_result_id);
1062 all_args_const &= r_constant_result;
1065 if(constant_expression && (!call.constructor || !all_args_const))
1066 throw internal_error("function call in constant expression");
1068 Id result_type_id = get_id(*call.type);
1069 r_constant_result = false;
1071 if(call.constructor)
1072 visit_constructor(call, argument_ids, all_args_const);
1073 else if(call.declaration->source==BUILTIN_SOURCE)
1076 for(const RefPtr<Expression> &a: call.arguments)
1077 if(BasicTypeDeclaration *basic_arg = dynamic_cast<BasicTypeDeclaration *>(a->type))
1079 BasicTypeDeclaration &elem_arg = *get_element_type(*basic_arg);
1080 switch(elem_arg.kind)
1082 case BasicTypeDeclaration::BOOL: arg_types += 'b'; break;
1083 case BasicTypeDeclaration::INT: arg_types += (elem_arg.sign ? 'i' : 'u'); break;
1084 case BasicTypeDeclaration::FLOAT: arg_types += 'f'; break;
1085 default: arg_types += '?';
1089 const BuiltinFunctionInfo *builtin_info;
1090 for(builtin_info=builtin_functions; builtin_info->function[0]; ++builtin_info)
1091 if(builtin_info->function==call.name && (!builtin_info->arg_types[0] || builtin_info->arg_types==arg_types))
1094 if(builtin_info->capability)
1095 use_capability(static_cast<Capability>(builtin_info->capability));
1097 if(builtin_info->opcode)
1100 if(builtin_info->extension[0])
1102 opcode = OP_EXT_INST;
1103 Id ext_id = import_extension(builtin_info->extension);
1105 r_expression_result_id = begin_expression(opcode, result_type_id);
1106 writer.write(ext_id);
1107 writer.write(builtin_info->opcode);
1111 opcode = static_cast<Opcode>(builtin_info->opcode);
1112 r_expression_result_id = begin_expression(opcode, result_type_id);
1115 for(unsigned i=0; i<call.arguments.size(); ++i)
1117 if(!builtin_info->arg_order[i] || builtin_info->arg_order[i]>argument_ids.size())
1118 throw internal_error("invalid builtin function info");
1119 writer.write(argument_ids[builtin_info->arg_order[i]-1]);
1122 end_expression(opcode);
1124 else if(builtin_info->handler)
1125 (this->*(builtin_info->handler))(call, argument_ids);
1127 throw internal_error("unknown builtin function "+call.name);
1131 r_expression_result_id = begin_expression(OP_FUNCTION_CALL, result_type_id, 1+call.arguments.size());
1132 writer.write(get_id(*call.declaration->definition));
1133 for(Id i: argument_ids)
1135 end_expression(OP_FUNCTION_CALL);
1137 // Any global variables the called function uses might have changed value
1138 set<Node *> dependencies = DependencyCollector().apply(*call.declaration->definition);
1139 for(Node *n: dependencies)
1140 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(n))
1141 variable_load_ids.erase(var);
1145 void SpirVGenerator::visit_constructor(FunctionCall &call, const vector<Id> &argument_ids, bool all_args_const)
1147 Id result_type_id = get_id(*call.type);
1149 BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(call.type);
1152 if(dynamic_cast<const StructDeclaration *>(call.type))
1153 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1155 throw internal_error("unconstructable type "+call.name);
1159 SetFlag set_const(constant_expression, constant_expression || all_args_const);
1161 BasicTypeDeclaration &elem = *get_element_type(*basic);
1162 BasicTypeDeclaration &basic_arg0 = dynamic_cast<BasicTypeDeclaration &>(*call.arguments[0]->type);
1163 BasicTypeDeclaration &elem_arg0 = *get_element_type(basic_arg0);
1165 if(basic->kind==BasicTypeDeclaration::MATRIX)
1167 Id col_type_id = get_id(*basic->base_type);
1168 unsigned n_columns = basic->size&0xFFFF;
1169 unsigned n_rows = basic->size>>16;
1172 if(call.arguments.size()==1)
1174 // Construct diagonal matrix from a single scalar.
1175 Id zero_id = get_constant_id(get_id(elem), 0.0f);
1176 for(unsigned i=0; i<n_columns; ++i)
1178 column_ids[i] = begin_expression(OP_COMPOSITE_CONSTRUCT, col_type_id, n_rows);
1179 for(unsigned j=0; j<n_rows; ++j)
1180 writer.write(j==i ? argument_ids[0] : zero_id);
1181 end_expression(OP_COMPOSITE_CONSTRUCT);
1185 // Construct a matrix from column vectors
1186 copy(argument_ids.begin(), argument_ids.begin()+n_columns, column_ids);
1188 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
1190 else if(basic->kind==BasicTypeDeclaration::VECTOR && (call.arguments.size()>1 || basic_arg0.kind!=BasicTypeDeclaration::VECTOR))
1192 /* There's either a single scalar argument or multiple arguments
1193 which make up the vector's components. */
1194 if(call.arguments.size()==1)
1196 r_expression_result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, result_type_id);
1197 for(unsigned i=0; i<basic->size; ++i)
1198 writer.write(argument_ids[0]);
1199 end_expression(OP_COMPOSITE_CONSTRUCT);
1202 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1204 else if(elem.kind==BasicTypeDeclaration::BOOL)
1206 if(constant_expression)
1207 throw internal_error("unconverted constant");
1209 // Conversion to boolean is implemented as comparing against zero.
1210 Id number_type_id = get_id(elem_arg0);
1211 Id zero_id = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ?
1212 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1213 if(basic_arg0.kind==BasicTypeDeclaration::VECTOR)
1214 zero_id = get_vector_constant_id(get_id(basic_arg0), basic_arg0.size, zero_id);
1216 Opcode opcode = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ? OP_F_ORD_NOT_EQUAL : OP_I_NOT_EQUAL);
1217 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0], zero_id);
1219 else if(elem_arg0.kind==BasicTypeDeclaration::BOOL)
1221 if(constant_expression)
1222 throw internal_error("unconverted constant");
1224 /* Conversion from boolean is implemented as selecting from zero
1226 Id number_type_id = get_id(elem);
1227 Id zero_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1228 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1229 Id one_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1230 get_constant_id(number_type_id, 1.0f) : get_constant_id(number_type_id, 1));
1231 if(basic->kind==BasicTypeDeclaration::VECTOR)
1233 zero_id = get_vector_constant_id(get_id(*basic), basic->size, zero_id);
1234 one_id = get_vector_constant_id(get_id(*basic), basic->size, one_id);
1237 r_expression_result_id = begin_expression(OP_SELECT, result_type_id, 3);
1238 writer.write(argument_ids[0]);
1239 writer.write(zero_id);
1240 writer.write(one_id);
1241 end_expression(OP_SELECT);
1245 if(constant_expression)
1246 throw internal_error("unconverted constant");
1248 // Scalar or vector conversion between types of equal size.
1250 if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::FLOAT)
1251 opcode = (elem.sign ? OP_CONVERT_F_TO_S : OP_CONVERT_F_TO_U);
1252 else if(elem.kind==BasicTypeDeclaration::FLOAT && elem_arg0.kind==BasicTypeDeclaration::INT)
1253 opcode = (elem_arg0.sign ? OP_CONVERT_S_TO_F : OP_CONVERT_U_TO_F);
1254 else if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::INT)
1255 opcode = OP_BITCAST;
1257 throw internal_error("invalid conversion");
1259 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0]);
1263 void SpirVGenerator::visit_builtin_matrix_comp_mult(FunctionCall &call, const vector<Id> &argument_ids)
1265 if(argument_ids.size()!=2)
1266 throw internal_error("invalid matrixCompMult call");
1268 const BasicTypeDeclaration &basic_arg0 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[0]->type);
1269 Id column_type_id = get_id(*basic_arg0.base_type);
1272 unsigned n_columns = basic_arg0.size&0xFFFF;
1273 write_deconstruct(column_type_id, argument_ids[0], column_ids, n_columns);
1274 write_deconstruct(column_type_id, argument_ids[1], column_ids+4, n_columns);
1276 for(unsigned i=0; i<n_columns; ++i)
1277 column_ids[i] = write_expression(OP_F_MUL, column_type_id, column_ids[i], column_ids[4+i]);
1279 r_expression_result_id = write_construct(get_id(*call.type), column_ids, n_columns);
1282 void SpirVGenerator::visit_builtin_texture_query(FunctionCall &call, const vector<Id> &argument_ids)
1284 if(argument_ids.size()<1)
1285 throw internal_error("invalid texture query call");
1288 if(call.name=="textureSize")
1289 opcode = OP_IMAGE_QUERY_SIZE_LOD;
1290 else if(call.name=="textureQueryLod")
1291 opcode = OP_IMAGE_QUERY_LOD;
1292 else if(call.name=="textureQueryLevels")
1293 opcode = OP_IMAGE_QUERY_LEVELS;
1295 throw internal_error("invalid texture query call");
1297 ImageTypeDeclaration &image_arg0 = dynamic_cast<ImageTypeDeclaration &>(*call.arguments[0]->type);
1300 if(image_arg0.sampled)
1302 Id image_type_id = get_item(image_type_ids, get_id(image_arg0));
1303 image_id = write_expression(OP_IMAGE, image_type_id, argument_ids[0]);
1306 image_id = argument_ids[0];
1308 Id result_type_id = get_id(*call.type);
1309 r_expression_result_id = begin_expression(opcode, result_type_id, argument_ids.size());
1310 writer.write(image_id);
1311 for(unsigned i=1; i<argument_ids.size(); ++i)
1312 writer.write(argument_ids[i]);
1313 end_expression(opcode);
1316 void SpirVGenerator::visit_builtin_texture(FunctionCall &call, const vector<Id> &argument_ids)
1318 if(argument_ids.size()<2)
1319 throw internal_error("invalid texture sampling call");
1321 bool explicit_lod = (stage->type!=Stage::FRAGMENT || call.name=="textureLod");
1322 Id lod_id = (!explicit_lod ? 0 : call.name=="textureLod" ? argument_ids.back() :
1323 get_constant_id(get_standard_type_id(BasicTypeDeclaration::FLOAT, 1), 0.0f));
1325 const ImageTypeDeclaration &image = dynamic_cast<const ImageTypeDeclaration &>(*call.arguments[0]->type);
1328 Id result_type_id = get_id(*call.type);
1332 if(argument_ids.size()==2)
1334 const BasicTypeDeclaration &basic_arg1 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[1]->type);
1335 dref_id = begin_expression(OP_COMPOSITE_EXTRACT, get_id(*basic_arg1.base_type), 2);
1336 writer.write(argument_ids.back());
1337 writer.write(basic_arg1.size-1);
1338 end_expression(OP_COMPOSITE_EXTRACT);
1341 dref_id = argument_ids[2];
1343 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_DREF_EXPLICIT_LOD : OP_IMAGE_SAMPLE_DREF_IMPLICIT_LOD);
1344 r_expression_result_id = begin_expression(opcode, result_type_id, 3+explicit_lod*2);
1348 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_EXPLICIT_LOD : OP_IMAGE_SAMPLE_IMPLICIT_LOD);
1349 r_expression_result_id = begin_expression(opcode, result_type_id, 2+explicit_lod*2);
1352 for(unsigned i=0; i<2; ++i)
1353 writer.write(argument_ids[i]);
1355 writer.write(dref_id);
1358 writer.write(2); // Lod
1359 writer.write(lod_id);
1362 end_expression(opcode);
1365 void SpirVGenerator::visit_builtin_texel_fetch(FunctionCall &call, const vector<Id> &argument_ids)
1367 if(argument_ids.size()!=3)
1368 throw internal_error("invalid texelFetch call");
1370 r_expression_result_id = begin_expression(OP_IMAGE_FETCH, get_id(*call.type), 4);
1371 for(unsigned i=0; i<2; ++i)
1372 writer.write(argument_ids[i]);
1373 writer.write(2); // Lod
1374 writer.write(argument_ids.back());
1375 end_expression(OP_IMAGE_FETCH);
1378 void SpirVGenerator::visit_builtin_interpolate(FunctionCall &call, const vector<Id> &argument_ids)
1380 if(argument_ids.size()<1)
1381 throw internal_error("invalid interpolate call");
1382 const VariableReference *var = dynamic_cast<const VariableReference *>(call.arguments[0].get());
1383 if(!var || !var->declaration || var->declaration->interface!="in")
1384 throw internal_error("invalid interpolate call");
1386 SpirVGlslStd450Opcode opcode;
1387 if(call.name=="interpolateAtCentroid")
1388 opcode = GLSL450_INTERPOLATE_AT_CENTROID;
1389 else if(call.name=="interpolateAtSample")
1390 opcode = GLSL450_INTERPOLATE_AT_SAMPLE;
1391 else if(call.name=="interpolateAtOffset")
1392 opcode = GLSL450_INTERPOLATE_AT_OFFSET;
1394 throw internal_error("invalid interpolate call");
1396 Id ext_id = import_extension("GLSL.std.450");
1397 r_expression_result_id = begin_expression(OP_EXT_INST, get_id(*call.type));
1398 writer.write(ext_id);
1399 writer.write(opcode);
1400 writer.write(get_id(*var->declaration));
1401 for(auto i=argument_ids.begin(); ++i!=argument_ids.end(); )
1403 end_expression(OP_EXT_INST);
1406 void SpirVGenerator::visit(ExpressionStatement &expr)
1408 expr.expression->visit(*this);
1411 void SpirVGenerator::visit(InterfaceLayout &layout)
1413 interface_layouts.push_back(&layout);
1416 bool SpirVGenerator::check_duplicate_type(TypeDeclaration &type)
1418 for(const auto &kvp: declared_ids)
1419 if(TypeDeclaration *type2 = dynamic_cast<TypeDeclaration *>(kvp.first))
1420 if(TypeComparer().apply(type, *type2))
1422 insert_unique(declared_ids, &type, kvp.second);
1429 bool SpirVGenerator::check_standard_type(BasicTypeDeclaration &basic)
1431 const BasicTypeDeclaration *elem = (basic.kind==BasicTypeDeclaration::VECTOR ?
1432 dynamic_cast<const BasicTypeDeclaration *>(basic.base_type) : &basic);
1433 if(!elem || elem->base_type)
1435 if((elem->kind==BasicTypeDeclaration::INT || elem->kind==BasicTypeDeclaration::FLOAT) && elem->size!=32)
1438 Id standard_id = get_standard_type_id(elem->kind, (basic.kind==BasicTypeDeclaration::VECTOR ? basic.size : 1), elem->sign);
1439 insert_unique(declared_ids, &basic, Declaration(standard_id, 0));
1440 writer.write_op_name(standard_id, basic.name);
1445 void SpirVGenerator::visit(BasicTypeDeclaration &basic)
1447 if(check_standard_type(basic))
1449 if(check_duplicate_type(basic))
1451 // Alias types shouldn't exist at this point and arrays are handled elsewhere
1452 if(basic.kind==BasicTypeDeclaration::ALIAS || basic.kind==BasicTypeDeclaration::ARRAY)
1455 Id type_id = allocate_id(basic, 0);
1456 writer.write_op_name(type_id, basic.name);
1460 case BasicTypeDeclaration::INT:
1461 writer.write_op(content.globals, OP_TYPE_INT, type_id, basic.size, basic.sign);
1463 case BasicTypeDeclaration::FLOAT:
1464 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, basic.size);
1466 case BasicTypeDeclaration::VECTOR:
1467 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, get_id(*basic.base_type), basic.size);
1469 case BasicTypeDeclaration::MATRIX:
1470 writer.write_op(content.globals, OP_TYPE_MATRIX, type_id, get_id(*basic.base_type), basic.size&0xFFFF);
1473 throw internal_error("unknown basic type");
1477 void SpirVGenerator::visit(ImageTypeDeclaration &image)
1479 if(check_duplicate_type(image))
1482 Id type_id = allocate_id(image, 0);
1484 Id image_id = (image.sampled ? next_id++ : type_id);
1485 writer.begin_op(content.globals, OP_TYPE_IMAGE, 9);
1486 writer.write(image_id);
1487 writer.write(get_id(*image.base_type));
1488 writer.write(image.dimensions-1);
1489 writer.write(image.shadow);
1490 writer.write(image.array);
1491 writer.write(false); // Multisample
1492 writer.write(image.sampled ? 1 : 2);
1493 writer.write(0); // Format (unknown)
1494 writer.end_op(OP_TYPE_IMAGE);
1498 writer.write_op_name(type_id, image.name);
1499 writer.write_op(content.globals, OP_TYPE_SAMPLED_IMAGE, type_id, image_id);
1500 insert_unique(image_type_ids, type_id, image_id);
1503 if(image.dimensions==ImageTypeDeclaration::ONE)
1504 use_capability(image.sampled ? CAP_SAMPLED_1D : CAP_IMAGE_1D);
1505 else if(image.dimensions==ImageTypeDeclaration::CUBE && image.array)
1506 use_capability(image.sampled ? CAP_SAMPLED_CUBE_ARRAY : CAP_IMAGE_CUBE_ARRAY);
1509 void SpirVGenerator::visit(StructDeclaration &strct)
1511 if(check_duplicate_type(strct))
1514 Id type_id = allocate_id(strct, 0);
1515 writer.write_op_name(type_id, (strct.block_name.empty() ? strct.name : strct.block_name));
1517 if(!strct.block_name.empty())
1518 writer.write_op_decorate(type_id, DECO_BLOCK);
1520 bool builtin = !strct.block_name.compare(0, 3, "gl_");
1521 vector<Id> member_type_ids;
1522 member_type_ids.reserve(strct.members.body.size());
1523 for(const RefPtr<Statement> &s: strct.members.body)
1525 const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(s.get());
1529 unsigned index = member_type_ids.size();
1530 member_type_ids.push_back(get_variable_type_id(*var));
1532 writer.write_op_member_name(type_id, index, var->name);
1536 BuiltinSemantic semantic = get_builtin_semantic(var->name);
1537 writer.write_op_member_decorate(type_id, index, DECO_BUILTIN, semantic);
1543 for(const Layout::Qualifier &q: var->layout->qualifiers)
1545 if(q.name=="offset")
1546 writer.write_op_member_decorate(type_id, index, DECO_OFFSET, q.value);
1547 else if(q.name=="column_major")
1548 writer.write_op_member_decorate(type_id, index, DECO_COL_MAJOR);
1549 else if(q.name=="row_major")
1550 writer.write_op_member_decorate(type_id, index, DECO_ROW_MAJOR);
1554 const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var->type_declaration);
1555 while(basic && basic->kind==BasicTypeDeclaration::ARRAY)
1556 basic = dynamic_cast<const BasicTypeDeclaration *>(basic->base_type);
1557 if(basic && basic->kind==BasicTypeDeclaration::MATRIX)
1559 unsigned stride = MemoryRequirementsCalculator().apply(*basic->base_type).stride;
1560 writer.write_op_member_decorate(type_id, index, DECO_MATRIX_STRIDE, stride);
1565 writer.begin_op(content.globals, OP_TYPE_STRUCT);
1566 writer.write(type_id);
1567 for(Id i: member_type_ids)
1569 writer.end_op(OP_TYPE_STRUCT);
1572 void SpirVGenerator::visit(VariableDeclaration &var)
1574 Id type_id = get_variable_type_id(var);
1579 if(!var.init_expression)
1580 throw internal_error("const variable without initializer");
1582 int spec_id = get_layout_value(var.layout.get(), "constant_id");
1583 Id *spec_var_id = (spec_id>=0 ? &declared_spec_ids[spec_id] : 0);
1584 if(spec_id>=0 && *spec_var_id)
1586 insert_unique(declared_ids, &var, Declaration(*spec_var_id, type_id));
1590 SetFlag set_const(constant_expression);
1591 SetFlag set_spec(spec_constant, spec_id>=0);
1592 r_expression_result_id = 0;
1593 var.init_expression->visit(*this);
1594 var_id = r_expression_result_id;
1595 insert_unique(declared_ids, &var, Declaration(var_id, type_id));
1598 writer.write_op_decorate(var_id, DECO_SPEC_ID, spec_id);
1599 *spec_var_id = var_id;
1604 bool push_const = has_layout_qualifier(var.layout.get(), "push_constant");
1606 StorageClass storage;
1607 if(current_function)
1608 storage = STORAGE_FUNCTION;
1610 storage = STORAGE_PUSH_CONSTANT;
1612 storage = get_interface_storage(var.interface, var.block_declaration);
1614 Id ptr_type_id = get_pointer_type_id(type_id, storage);
1615 if(var.interface=="uniform")
1617 Id &uni_id = declared_uniform_ids[var.block_declaration ? "b"+var.block_declaration->block_name : "v"+var.name];
1620 insert_unique(declared_ids, &var, Declaration(uni_id, ptr_type_id));
1624 uni_id = var_id = allocate_id(var, ptr_type_id);
1627 var_id = allocate_id(var, (var.constant ? type_id : ptr_type_id));
1630 if(var.init_expression)
1632 SetFlag set_const(constant_expression, !current_function);
1633 r_expression_result_id = 0;
1634 r_constant_result = false;
1635 var.init_expression->visit(*this);
1636 init_id = r_expression_result_id;
1639 vector<Word> &target = (current_function ? content.locals : content.globals);
1640 writer.begin_op(target, OP_VARIABLE, 4+(init_id && !current_function));
1641 writer.write(ptr_type_id);
1642 writer.write(var_id);
1643 writer.write(storage);
1644 if(init_id && !current_function)
1645 writer.write(init_id);
1646 writer.end_op(OP_VARIABLE);
1650 for(const Layout::Qualifier &q: var.layout->qualifiers)
1652 if(q.name=="location")
1653 writer.write_op_decorate(var_id, DECO_LOCATION, q.value);
1654 else if(q.name=="set")
1655 writer.write_op_decorate(var_id, DECO_DESCRIPTOR_SET, q.value);
1656 else if(q.name=="binding")
1657 writer.write_op_decorate(var_id, DECO_BINDING, q.value);
1660 if(!var.block_declaration && !var.name.compare(0, 3, "gl_"))
1662 BuiltinSemantic semantic = get_builtin_semantic(var.name);
1663 writer.write_op_decorate(var_id, DECO_BUILTIN, semantic);
1666 if(init_id && current_function)
1668 writer.write_op(content.function_body, OP_STORE, var_id, init_id);
1669 variable_load_ids[&var] = init_id;
1673 if(var.name.find(' ')==string::npos)
1674 writer.write_op_name(var_id, var.name);
1677 void SpirVGenerator::visit_entry_point(FunctionDeclaration &func, Id func_id)
1679 writer.begin_op(content.entry_points, OP_ENTRY_POINT);
1682 case Stage::VERTEX: writer.write(0); break;
1683 case Stage::GEOMETRY: writer.write(3); break;
1684 case Stage::FRAGMENT: writer.write(4); break;
1685 default: throw internal_error("unknown stage");
1687 writer.write(func_id);
1688 writer.write_string(func.name);
1690 set<Node *> dependencies = DependencyCollector().apply(func);
1691 for(Node *n: dependencies)
1692 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(n))
1693 if(!var->interface.empty())
1694 writer.write(get_id(*n));
1696 writer.end_op(OP_ENTRY_POINT);
1698 if(stage->type==Stage::FRAGMENT)
1700 SpirVExecutionMode origin = (features.target_api==VULKAN ? EXEC_ORIGIN_UPPER_LEFT : EXEC_ORIGIN_LOWER_LEFT);
1701 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, origin);
1703 else if(stage->type==Stage::GEOMETRY)
1704 use_capability(CAP_GEOMETRY);
1706 for(const InterfaceLayout *i: interface_layouts)
1708 for(const Layout::Qualifier &q: i->layout.qualifiers)
1711 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id,
1712 (i->interface=="in" ? EXEC_INPUT_POINTS : EXEC_OUTPUT_POINTS));
1713 else if(q.name=="lines")
1714 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES);
1715 else if(q.name=="lines_adjacency")
1716 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES_ADJACENCY);
1717 else if(q.name=="triangles")
1718 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_TRIANGLES);
1719 else if(q.name=="triangles_adjacency")
1720 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_TRIANGLES_ADJACENCY);
1721 else if(q.name=="line_strip")
1722 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_LINE_STRIP);
1723 else if(q.name=="triangle_strip")
1724 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_TRIANGLE_STRIP);
1725 else if(q.name=="max_vertices")
1726 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_VERTICES, q.value);
1731 void SpirVGenerator::visit(FunctionDeclaration &func)
1733 if(func.source==BUILTIN_SOURCE)
1735 else if(func.definition!=&func)
1738 allocate_forward_id(*func.definition);
1742 Id return_type_id = get_id(*func.return_type_declaration);
1743 vector<unsigned> param_type_ids;
1744 param_type_ids.reserve(func.parameters.size());
1745 for(const RefPtr<VariableDeclaration> &p: func.parameters)
1746 param_type_ids.push_back(get_variable_type_id(*p));
1748 string sig_with_return = func.return_type+func.signature;
1749 Id &type_id = function_type_ids[sig_with_return];
1752 type_id = next_id++;
1753 writer.begin_op(content.globals, OP_TYPE_FUNCTION);
1754 writer.write(type_id);
1755 writer.write(return_type_id);
1756 for(unsigned i: param_type_ids)
1758 writer.end_op(OP_TYPE_FUNCTION);
1760 writer.write_op_name(type_id, sig_with_return);
1763 Id func_id = allocate_id(func, type_id);
1764 writer.write_op_name(func_id, func.name+func.signature);
1766 if(func.name=="main")
1767 visit_entry_point(func, func_id);
1769 writer.begin_op(content.functions, OP_FUNCTION, 5);
1770 writer.write(return_type_id);
1771 writer.write(func_id);
1772 writer.write(0); // Function control flags (none)
1773 writer.write(type_id);
1774 writer.end_op(OP_FUNCTION);
1776 for(unsigned i=0; i<func.parameters.size(); ++i)
1778 Id param_id = allocate_id(*func.parameters[i], param_type_ids[i]);
1779 writer.write_op(content.functions, OP_FUNCTION_PARAMETER, param_type_ids[i], param_id);
1780 writer.write_op_name(param_id, func.parameters[i]->name);
1781 // TODO This is probably incorrect if the parameter is assigned to.
1782 variable_load_ids[func.parameters[i].get()] = param_id;
1786 writer.begin_function_body(next_id++);
1787 SetForScope<FunctionDeclaration *> set_func(current_function, &func);
1788 func.body.visit(*this);
1790 if(writer.get_current_block())
1793 writer.write_op(content.function_body, OP_UNREACHABLE);
1796 const BasicTypeDeclaration *basic_return = dynamic_cast<const BasicTypeDeclaration *>(func.return_type_declaration);
1797 if(basic_return && basic_return->kind==BasicTypeDeclaration::VOID)
1798 writer.write_op(content.function_body, OP_RETURN);
1800 throw internal_error("missing return in non-void function");
1803 writer.end_function_body();
1804 variable_load_ids.clear();
1807 void SpirVGenerator::visit(Conditional &cond)
1809 cond.condition->visit(*this);
1811 Id true_label_id = next_id++;
1812 Id merge_block_id = next_id++;
1813 Id false_label_id = (cond.else_body.body.empty() ? merge_block_id : next_id++);
1814 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1815 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, true_label_id, false_label_id);
1817 std::map<const VariableDeclaration *, Id> saved_load_ids = variable_load_ids;
1819 writer.write_op_label(true_label_id);
1820 cond.body.visit(*this);
1821 if(writer.get_current_block())
1822 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1824 bool reachable_if_true = reachable;
1827 if(!cond.else_body.body.empty())
1829 swap(saved_load_ids, variable_load_ids);
1830 writer.write_op_label(false_label_id);
1831 cond.else_body.visit(*this);
1832 reachable |= reachable_if_true;
1835 writer.write_op_label(merge_block_id);
1836 prune_loads(true_label_id);
1839 void SpirVGenerator::visit(Iteration &iter)
1841 if(iter.init_statement)
1842 iter.init_statement->visit(*this);
1844 for(Node *n: AssignmentCollector().apply(iter))
1845 if(VariableDeclaration *var = dynamic_cast<VariableDeclaration *>(n))
1846 variable_load_ids.erase(var);
1848 Id header_id = next_id++;
1849 Id continue_id = next_id++;
1850 Id merge_block_id = next_id++;
1852 SetForScope<Id> set_merge(loop_merge_block_id, merge_block_id);
1853 SetForScope<Id> set_continue(loop_continue_target_id, continue_id);
1855 writer.write_op_label(header_id);
1856 writer.write_op(content.function_body, OP_LOOP_MERGE, merge_block_id, continue_id, 0); // Loop control (none)
1858 Id body_id = next_id++;
1861 writer.write_op_label(next_id++);
1862 iter.condition->visit(*this);
1863 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, body_id, merge_block_id);
1866 writer.write_op_label(body_id);
1867 iter.body.visit(*this);
1869 writer.write_op_label(continue_id);
1870 if(iter.loop_expression)
1871 iter.loop_expression->visit(*this);
1872 writer.write_op(content.function_body, OP_BRANCH, header_id);
1874 writer.write_op_label(merge_block_id);
1875 prune_loads(header_id);
1879 void SpirVGenerator::visit(Return &ret)
1883 ret.expression->visit(*this);
1884 writer.write_op(content.function_body, OP_RETURN_VALUE, r_expression_result_id);
1887 writer.write_op(content.function_body, OP_RETURN);
1891 void SpirVGenerator::visit(Jump &jump)
1893 if(jump.keyword=="discard")
1894 writer.write_op(content.function_body, OP_KILL);
1895 else if(jump.keyword=="break")
1896 writer.write_op(content.function_body, OP_BRANCH, loop_merge_block_id);
1897 else if(jump.keyword=="continue")
1898 writer.write_op(content.function_body, OP_BRANCH, loop_continue_target_id);
1900 throw internal_error("unknown jump");
1905 SpirVGenerator::TypeKey::TypeKey(BasicTypeDeclaration::Kind kind, bool sign):
1910 case BasicTypeDeclaration::VOID: detail = 'v'; break;
1911 case BasicTypeDeclaration::BOOL: detail = 'b'; break;
1912 case BasicTypeDeclaration::INT: detail = (sign ? 'i' : 'u'); break;
1913 case BasicTypeDeclaration::FLOAT: detail = 'f'; break;
1914 default: throw invalid_argument("TypeKey::TypeKey");
1918 bool SpirVGenerator::TypeKey::operator<(const TypeKey &other) const
1920 if(type_id!=other.type_id)
1921 return type_id<other.type_id;
1922 return detail<other.detail;
1926 bool SpirVGenerator::ConstantKey::operator<(const ConstantKey &other) const
1928 if(type_id!=other.type_id)
1929 return type_id<other.type_id;
1930 return int_value<other.int_value;