1 #include <msp/core/maputils.h>
2 #include <msp/core/raii.h>
12 const SpirVGenerator::BuiltinFunctionInfo SpirVGenerator::builtin_functions[] =
14 { "radians", "f", "GLSL.std.450", GLSL450_RADIANS, { 1 }, 0, 0 },
15 { "degrees", "f", "GLSL.std.450", GLSL450_DEGREES, { 1 }, 0, 0 },
16 { "sin", "f", "GLSL.std.450", GLSL450_SIN, { 1 }, 0, 0 },
17 { "cos", "f", "GLSL.std.450", GLSL450_COS, { 1 }, 0, 0 },
18 { "tan", "f", "GLSL.std.450", GLSL450_TAN, { 1 }, 0, 0 },
19 { "asin", "f", "GLSL.std.450", GLSL450_ASIN, { 1 }, 0, 0 },
20 { "acos", "f", "GLSL.std.450", GLSL450_ACOS, { 1 }, 0, 0 },
21 { "atan", "f", "GLSL.std.450", GLSL450_ATAN, { 1 }, 0, 0 },
22 { "atan", "ff", "GLSL.std.450", GLSL450_ATAN2, { 1, 2 }, 0, 0 },
23 { "sinh", "f", "GLSL.std.450", GLSL450_SINH, { 1 }, 0, 0 },
24 { "cosh", "f", "GLSL.std.450", GLSL450_COSH, { 1 }, 0, 0 },
25 { "tanh", "f", "GLSL.std.450", GLSL450_TANH, { 1 }, 0, 0 },
26 { "asinh", "f", "GLSL.std.450", GLSL450_ASINH, { 1 }, 0, 0 },
27 { "acosh", "f", "GLSL.std.450", GLSL450_ACOSH, { 1 }, 0, 0 },
28 { "atanh", "f", "GLSL.std.450", GLSL450_ATANH, { 1 }, 0, 0 },
29 { "pow", "ff", "GLSL.std.450", GLSL450_POW, { 1, 2 }, 0, 0 },
30 { "exp", "f", "GLSL.std.450", GLSL450_EXP, { 1 }, 0, 0 },
31 { "log", "f", "GLSL.std.450", GLSL450_LOG, { 1 }, 0, 0 },
32 { "exp2", "f", "GLSL.std.450", GLSL450_EXP2, { 1 }, 0, 0 },
33 { "log2", "f", "GLSL.std.450", GLSL450_LOG2, { 1 }, 0, 0 },
34 { "sqrt", "f", "GLSL.std.450", GLSL450_SQRT, { 1 }, 0, 0 },
35 { "inversesqrt", "f", "GLSL.std.450", GLSL450_INVERSE_SQRT, { 1 }, 0, 0 },
36 { "abs", "f", "GLSL.std.450", GLSL450_F_ABS, { 1 }, 0, 0 },
37 { "abs", "i", "GLSL.std.450", GLSL450_S_ABS, { 1 }, 0, 0 },
38 { "sign", "f", "GLSL.std.450", GLSL450_F_SIGN, { 1 }, 0, 0 },
39 { "sign", "i", "GLSL.std.450", GLSL450_S_SIGN, { 1 }, 0, 0 },
40 { "floor", "f", "GLSL.std.450", GLSL450_FLOOR, { 1 }, 0, 0 },
41 { "trunc", "f", "GLSL.std.450", GLSL450_TRUNC, { 1 }, 0, 0 },
42 { "round", "f", "GLSL.std.450", GLSL450_ROUND, { 1 }, 0, 0 },
43 { "roundEven", "f", "GLSL.std.450", GLSL450_ROUND_EVEN, { 1 }, 0, 0 },
44 { "ceil", "f", "GLSL.std.450", GLSL450_CEIL, { 1 }, 0, 0 },
45 { "fract", "f", "GLSL.std.450", GLSL450_FRACT, { 1 }, 0, 0 },
46 { "mod", "f", "", OP_F_MOD, { 1, 2 }, 0, 0 },
47 { "min", "ff", "GLSL.std.450", GLSL450_F_MIN, { 1, 2 }, 0, 0 },
48 { "min", "ii", "GLSL.std.450", GLSL450_S_MIN, { 1, 2 }, 0, 0 },
49 { "min", "uu", "GLSL.std.450", GLSL450_U_MIN, { 1, 2 }, 0, 0 },
50 { "max", "ff", "GLSL.std.450", GLSL450_F_MAX, { 1, 2 }, 0, 0 },
51 { "max", "ii", "GLSL.std.450", GLSL450_S_MAX, { 1, 2 }, 0, 0 },
52 { "max", "uu", "GLSL.std.450", GLSL450_U_MAX, { 1, 2 }, 0, 0 },
53 { "clamp", "fff", "GLSL.std.450", GLSL450_F_CLAMP, { 1, 2, 3 }, 0, 0 },
54 { "clamp", "iii", "GLSL.std.450", GLSL450_S_CLAMP, { 1, 2, 3 }, 0, 0 },
55 { "clamp", "uuu", "GLSL.std.450", GLSL450_U_CLAMP, { 1, 2, 3 }, 0, 0 },
56 { "mix", "fff", "GLSL.std.450", GLSL450_F_MIX, { 1, 2, 3 }, 0, 0 },
57 { "mix", "ffb", "", OP_SELECT, { 3, 2, 1 }, 0, 0 },
58 { "mix", "iib", "", OP_SELECT, { 3, 2, 1 }, 0, 0 },
59 { "mix", "uub", "", OP_SELECT, { 3, 2, 1 }, 0, 0 },
60 { "step", "ff", "GLSL.std.450", GLSL450_F_STEP, { 1, 2 }, 0, 0 },
61 { "smoothstep", "fff", "GLSL.std.450", GLSL450_F_SMOOTH_STEP, { 1, 2, 3 }, 0, 0 },
62 { "isnan", "f", "", OP_IS_NAN, { 1 }, 0, 0 },
63 { "isinf", "f", "", OP_IS_INF, { 1 }, 0, 0 },
64 { "fma", "fff", "GLSL.std.450", GLSL450_F_FMA, { 1, 2, 3 }, 0, 0 },
65 { "length", "f", "GLSL.std.450", GLSL450_LENGTH, { 1 }, 0, 0 },
66 { "distance", "ff", "GLSL.std.450", GLSL450_DISTANCE, { 1, 2 }, 0, 0 },
67 { "dot", "ff", "", OP_DOT, { 1, 2 }, 0, 0 },
68 { "cross", "ff", "GLSL.std.450", GLSL450_CROSS, { 1, 2 }, 0, 0 },
69 { "normalize", "f", "GLSL.std.450", GLSL450_NORMALIZE, { 1 }, 0, 0 },
70 { "faceforward", "fff", "GLSL.std.450", GLSL450_FACE_FORWARD, { 1, 2, 3 }, 0, 0 },
71 { "reflect", "ff", "GLSL.std.450", GLSL450_REFLECT, { 1, 2 }, 0, 0 },
72 { "refract", "fff", "GLSL.std.450", GLSL450_REFRACT, { 1, 2, 3 }, 0, 0 },
73 { "matrixCompMult", "ff", "", 0, { 0 }, 0, &SpirVGenerator::visit_builtin_matrix_comp_mult },
74 { "outerProduct", "ff", "", OP_OUTER_PRODUCT, { 1, 2 }, 0, 0 },
75 { "transpose", "f", "", OP_TRANSPOSE, { 1 }, 0, 0 },
76 { "determinant", "f", "GLSL.std.450", GLSL450_DETERMINANT, { 1 }, 0, 0 },
77 { "inverse", "f", "GLSL.std.450", GLSL450_MATRIX_INVERSE, { 1 }, 0, 0 },
78 { "lessThan", "ff", "", OP_F_ORD_LESS_THAN, { 1, 2 }, 0, 0 },
79 { "lessThan", "ii", "", OP_S_LESS_THAN, { 1, 2 }, 0, 0 },
80 { "lessThan", "uu", "", OP_U_LESS_THAN, { 1, 2 }, 0, 0 },
81 { "lessThanEqual", "ff", "", OP_F_ORD_LESS_THAN_EQUAL, { 1, 2 }, 0, 0 },
82 { "lessThanEqual", "ii", "", OP_S_LESS_THAN_EQUAL, { 1, 2 }, 0, 0 },
83 { "lessThanEqual", "uu", "", OP_U_LESS_THAN_EQUAL, { 1, 2 }, 0, 0 },
84 { "greaterThan", "ff", "", OP_F_ORD_GREATER_THAN, { 1, 2 }, 0, 0 },
85 { "greaterThan", "ii", "", OP_S_GREATER_THAN, { 1, 2 }, 0, 0 },
86 { "greaterThan", "uu", "", OP_U_GREATER_THAN, { 1, 2 }, 0, 0 },
87 { "greaterThanEqual", "ff", "", OP_F_ORD_GREATER_THAN_EQUAL, { 1, 2 }, 0, 0 },
88 { "greaterThanEqual", "ii", "", OP_S_GREATER_THAN_EQUAL, { 1, 2 }, 0, 0 },
89 { "greaterThanEqual", "uu", "", OP_U_GREATER_THAN_EQUAL, { 1, 2 }, 0, 0 },
90 { "equal", "ff", "", OP_F_ORD_EQUAL, { 1, 2 }, 0, 0 },
91 { "equal", "ii", "", OP_I_EQUAL, { 1, 2 }, 0, 0 },
92 { "equal", "uu", "", OP_I_EQUAL, { 1, 2 }, 0, 0 },
93 { "notEqual", "ff", "", OP_F_ORD_NOT_EQUAL, { 1, 2 }, 0, 0 },
94 { "notEqual", "ii", "", OP_I_NOT_EQUAL, { 1, 2 }, 0, 0 },
95 { "notEqual", "uu", "", OP_I_NOT_EQUAL, { 1, 2 }, 0, 0 },
96 { "any", "b", "", OP_ANY, { 1 }, 0, 0 },
97 { "all", "b", "", OP_ALL, { 1 }, 0, 0 },
98 { "not", "b", "", OP_LOGICAL_NOT, { 1 }, 0, 0 },
99 { "bitfieldExtract", "iii", "", OP_BIT_FIELD_S_EXTRACT, { 1, 2, 3 }, 0, 0 },
100 { "bitfieldExtract", "uii", "", OP_BIT_FIELD_U_EXTRACT, { 1, 2, 3 }, 0, 0 },
101 { "bitfieldInsert", "iiii", "", OP_BIT_FIELD_INSERT, { 1, 2, 3, 4 }, 0, 0 },
102 { "bitfieldInsert", "uuii", "", OP_BIT_FIELD_INSERT, { 1, 2, 3, 4 }, 0, 0 },
103 { "bitfieldReverse", "i", "", OP_BIT_REVERSE, { 1 }, 0, 0 },
104 { "bitfieldReverse", "u", "", OP_BIT_REVERSE, { 1 }, 0, 0 },
105 { "bitCount", "i", "", OP_BIT_COUNT, { 1 }, 0, 0 },
106 { "findLSB", "i", "GLSL.std.450", GLSL450_FIND_I_LSB, { 1 }, 0, 0 },
107 { "findLSB", "u", "GLSL.std.450", GLSL450_FIND_I_LSB, { 1 }, 0, 0 },
108 { "findMSB", "i", "GLSL.std.450", GLSL450_FIND_S_MSB, { 1 }, 0, 0 },
109 { "findMSB", "u", "GLSL.std.450", GLSL450_FIND_U_MSB, { 1 }, 0, 0 },
110 { "textureSize", "", "", 0, { }, CAP_IMAGE_QUERY, &SpirVGenerator::visit_builtin_texture_query },
111 { "textureQueryLod", "", "", 0, { }, CAP_IMAGE_QUERY, &SpirVGenerator::visit_builtin_texture_query },
112 { "textureQueryLevels", "", "", 0, { }, CAP_IMAGE_QUERY, &SpirVGenerator::visit_builtin_texture_query },
113 { "texture", "", "", 0, { }, 0, &SpirVGenerator::visit_builtin_texture },
114 { "textureLod", "", "", 0, { }, 0, &SpirVGenerator::visit_builtin_texture },
115 { "texelFetch", "", "", 0, { }, 0, &SpirVGenerator::visit_builtin_texel_fetch },
116 { "EmitVertex", "", "", OP_EMIT_VERTEX, { }, 0, 0 },
117 { "EndPrimitive", "", "", OP_END_PRIMITIVE, { }, 0, 0 },
118 { "dFdx", "f", "", OP_DP_DX, { 1 }, 0, 0 },
119 { "dFdy", "f", "", OP_DP_DY, { 1 }, 0, 0 },
120 { "dFdxFine", "f", "", OP_DP_DX_FINE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
121 { "dFdyFine", "f", "", OP_DP_DY_FINE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
122 { "dFdxCoarse", "f", "", OP_DP_DX_COARSE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
123 { "dFdyCoarse", "f", "", OP_DP_DY_COARSE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
124 { "fwidth", "f", "", OP_FWIDTH, { 1 }, 0, 0 },
125 { "fwidthFine", "f", "", OP_FWIDTH_FINE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
126 { "fwidthCoarse", "f", "", OP_FWIDTH_COARSE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
127 { "interpolateAtCentroid", "", "", 0, { }, CAP_INTERPOLATION_FUNCTION, &SpirVGenerator::visit_builtin_interpolate },
128 { "interpolateAtSample", "", "", 0, { }, CAP_INTERPOLATION_FUNCTION, &SpirVGenerator::visit_builtin_interpolate },
129 { "interpolateAtOffset", "", "", 0, { }, CAP_INTERPOLATION_FUNCTION, &SpirVGenerator::visit_builtin_interpolate },
130 { "", "", "", 0, { }, 0, 0 }
133 SpirVGenerator::SpirVGenerator():
138 r_expression_result_id(0),
139 constant_expression(false),
140 spec_constant(false),
142 composite_access(false),
143 r_composite_base_id(0),
145 assignment_source_id(0),
146 loop_merge_block_id(0),
147 loop_continue_target_id(0)
150 void SpirVGenerator::apply(Module &module)
152 use_capability(CAP_SHADER);
154 for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
157 interface_layouts.clear();
158 i->content.visit(*this);
161 writer.finalize(SPIRV_GENERATOR_MSP, next_id);
164 SpirVGenerator::StorageClass SpirVGenerator::get_interface_storage(const string &iface, bool block)
167 return STORAGE_INPUT;
168 else if(iface=="out")
169 return STORAGE_OUTPUT;
170 else if(iface=="uniform")
171 return (block ? STORAGE_UNIFORM : STORAGE_UNIFORM_CONSTANT);
172 else if(iface.empty())
173 return STORAGE_PRIVATE;
175 throw invalid_argument("SpirVGenerator::get_interface_storage");
178 SpirVGenerator::BuiltinSemantic SpirVGenerator::get_builtin_semantic(const string &name)
180 if(name=="gl_Position")
181 return BUILTIN_POSITION;
182 else if(name=="gl_PointSize")
183 return BUILTIN_POINT_SIZE;
184 else if(name=="gl_ClipDistance")
185 return BUILTIN_CLIP_DISTANCE;
186 else if(name=="gl_VertexID")
187 return BUILTIN_VERTEX_ID;
188 else if(name=="gl_InstanceID")
189 return BUILTIN_INSTANCE_ID;
190 else if(name=="gl_PrimitiveID" || name=="gl_PrimitiveIDIn")
191 return BUILTIN_PRIMITIVE_ID;
192 else if(name=="gl_InvocationID")
193 return BUILTIN_INVOCATION_ID;
194 else if(name=="gl_Layer")
195 return BUILTIN_LAYER;
196 else if(name=="gl_FragCoord")
197 return BUILTIN_FRAG_COORD;
198 else if(name=="gl_PointCoord")
199 return BUILTIN_POINT_COORD;
200 else if(name=="gl_FrontFacing")
201 return BUILTIN_FRONT_FACING;
202 else if(name=="gl_SampleId")
203 return BUILTIN_SAMPLE_ID;
204 else if(name=="gl_SamplePosition")
205 return BUILTIN_SAMPLE_POSITION;
206 else if(name=="gl_FragDepth")
207 return BUILTIN_FRAG_DEPTH;
209 throw invalid_argument("SpirVGenerator::get_builtin_semantic");
212 void SpirVGenerator::use_capability(Capability cap)
214 if(used_capabilities.count(cap))
217 used_capabilities.insert(cap);
218 writer.write_op(content.capabilities, OP_CAPABILITY, cap);
221 SpirVGenerator::Id SpirVGenerator::import_extension(const string &name)
223 Id &ext_id = imported_extension_ids[name];
227 writer.begin_op(content.extensions, OP_EXT_INST_IMPORT);
228 writer.write(ext_id);
229 writer.write_string(name);
230 writer.end_op(OP_EXT_INST_IMPORT);
235 SpirVGenerator::Id SpirVGenerator::get_id(Node &node) const
237 return get_item(declared_ids, &node).id;
240 SpirVGenerator::Id SpirVGenerator::allocate_id(Node &node, Id type_id)
242 map<Node *, Declaration>::iterator i = declared_ids.find(&node);
243 if(i!=declared_ids.end())
245 if(i->second.type_id)
246 throw key_error(&node);
247 i->second.type_id = type_id;
252 declared_ids.insert(make_pair(&node, Declaration(id, type_id)));
256 SpirVGenerator::Id SpirVGenerator::allocate_forward_id(Node &node)
258 map<Node *, Declaration>::iterator i = declared_ids.find(&node);
259 if(i!=declared_ids.end())
263 declared_ids.insert(make_pair(&node, Declaration(id, 0)));
267 SpirVGenerator::Id SpirVGenerator::write_constant(Id type_id, Word value, bool spec)
269 Id const_id = next_id++;
270 if(is_scalar_type(type_id, BasicTypeDeclaration::BOOL))
272 Opcode opcode = (value ? (spec ? OP_SPEC_CONSTANT_TRUE : OP_CONSTANT_TRUE) :
273 (spec ? OP_SPEC_CONSTANT_FALSE : OP_CONSTANT_FALSE));
274 writer.write_op(content.globals, opcode, type_id, const_id);
278 Opcode opcode = (spec ? OP_SPEC_CONSTANT : OP_CONSTANT);
279 writer.write_op(content.globals, opcode, type_id, const_id, value);
284 SpirVGenerator::ConstantKey SpirVGenerator::get_constant_key(Id type_id, const Variant &value)
286 if(value.check_type<bool>())
287 return ConstantKey(type_id, value.value<bool>());
288 else if(value.check_type<int>())
289 return ConstantKey(type_id, value.value<int>());
290 else if(value.check_type<unsigned>())
291 return ConstantKey(type_id, value.value<unsigned>());
292 else if(value.check_type<float>())
293 return ConstantKey(type_id, value.value<float>());
295 throw invalid_argument("SpirVGenerator::get_constant_key");
298 SpirVGenerator::Id SpirVGenerator::get_constant_id(Id type_id, const Variant &value)
300 ConstantKey key = get_constant_key(type_id, value);
301 Id &const_id = constant_ids[key];
303 const_id = write_constant(type_id, key.int_value, false);
307 SpirVGenerator::Id SpirVGenerator::get_vector_constant_id(Id type_id, unsigned size, Id scalar_id)
309 Id &const_id = constant_ids[get_constant_key(type_id, static_cast<int>(scalar_id))];
312 const_id = next_id++;
313 writer.begin_op(content.globals, OP_CONSTANT_COMPOSITE, 3+size);
314 writer.write(type_id);
315 writer.write(const_id);
316 for(unsigned i=0; i<size; ++i)
317 writer.write(scalar_id);
318 writer.end_op(OP_CONSTANT_COMPOSITE);
323 SpirVGenerator::Id SpirVGenerator::get_standard_type_id(BasicTypeDeclaration::Kind kind, unsigned size, bool sign)
325 Id base_id = (size>1 ? get_standard_type_id(kind, 1, sign) : 0);
326 Id &type_id = standard_type_ids[base_id ? TypeKey(base_id, size) : TypeKey(kind, sign)];
331 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, base_id, size);
332 else if(kind==BasicTypeDeclaration::VOID)
333 writer.write_op(content.globals, OP_TYPE_VOID, type_id);
334 else if(kind==BasicTypeDeclaration::BOOL)
335 writer.write_op(content.globals, OP_TYPE_BOOL, type_id);
336 else if(kind==BasicTypeDeclaration::INT)
337 writer.write_op(content.globals, OP_TYPE_INT, type_id, 32, sign);
338 else if(kind==BasicTypeDeclaration::FLOAT)
339 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, 32);
341 throw invalid_argument("SpirVGenerator::get_standard_type_id");
346 bool SpirVGenerator::is_scalar_type(Id type_id, BasicTypeDeclaration::Kind kind) const
348 map<TypeKey, Id>::const_iterator i = standard_type_ids.find(TypeKey(kind, true));
349 return (i!=standard_type_ids.end() && i->second==type_id);
352 SpirVGenerator::Id SpirVGenerator::get_array_type_id(TypeDeclaration &base_type, Id size_id)
354 Id base_type_id = get_id(base_type);
355 Id &array_type_id = array_type_ids[TypeKey(base_type_id, size_id)];
358 array_type_id = next_id++;
360 writer.write_op(content.globals, OP_TYPE_ARRAY, array_type_id, base_type_id, size_id);
362 writer.write_op(content.globals, OP_TYPE_RUNTIME_ARRAY, array_type_id, base_type_id);
364 unsigned stride = MemoryRequirementsCalculator().apply(base_type).stride;
365 writer.write_op_decorate(array_type_id, DECO_ARRAY_STRIDE, stride);
368 return array_type_id;
371 SpirVGenerator::Id SpirVGenerator::get_pointer_type_id(Id type_id, StorageClass storage)
373 Id &ptr_type_id = pointer_type_ids[TypeKey(type_id, storage)];
376 ptr_type_id = next_id++;
377 writer.write_op(content.globals, OP_TYPE_POINTER, ptr_type_id, storage, type_id);
382 SpirVGenerator::Id SpirVGenerator::get_variable_type_id(const VariableDeclaration &var)
384 if(const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var.type_declaration))
385 if(basic->kind==BasicTypeDeclaration::ARRAY)
390 SetFlag set_const(constant_expression);
391 r_expression_result_id = 0;
392 var.array_size->visit(*this);
393 size_id = r_expression_result_id;
396 size_id = get_constant_id(get_standard_type_id(BasicTypeDeclaration::INT, 1), 1);
397 return get_array_type_id(*basic->base_type, size_id);
400 return get_id(*var.type_declaration);
403 SpirVGenerator::Id SpirVGenerator::get_load_id(VariableDeclaration &var)
405 Id &load_result_id = variable_load_ids[&var];
408 load_result_id = next_id++;
409 writer.write_op(content.function_body, OP_LOAD, get_variable_type_id(var), load_result_id, get_id(var));
411 return load_result_id;
414 void SpirVGenerator::prune_loads(Id min_id)
416 for(map<const VariableDeclaration *, Id>::iterator i=variable_load_ids.begin(); i!=variable_load_ids.end(); )
418 if(i->second>=min_id)
419 variable_load_ids.erase(i++);
425 SpirVGenerator::Id SpirVGenerator::begin_expression(Opcode opcode, Id type_id, unsigned n_args)
427 bool has_result = (opcode==OP_FUNCTION_CALL || !is_scalar_type(type_id, BasicTypeDeclaration::VOID));
428 if(!constant_expression)
430 if(!current_function)
431 throw internal_error("non-constant expression outside a function");
433 writer.begin_op(content.function_body, opcode, (n_args ? 1+has_result*2+n_args : 0));
435 else if(opcode==OP_COMPOSITE_CONSTRUCT)
436 writer.begin_op(content.globals, (spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE),
437 (n_args ? 1+has_result*2+n_args : 0));
438 else if(!spec_constant)
439 throw internal_error("invalid non-specialization constant expression");
441 writer.begin_op(content.globals, OP_SPEC_CONSTANT_OP, (n_args ? 2+has_result*2+n_args : 0));
443 Id result_id = next_id++;
446 writer.write(type_id);
447 writer.write(result_id);
449 if(spec_constant && opcode!=OP_COMPOSITE_CONSTRUCT)
450 writer.write(opcode);
455 void SpirVGenerator::end_expression(Opcode opcode)
457 if(constant_expression)
458 opcode = (opcode==OP_COMPOSITE_CONSTRUCT ? spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE : OP_SPEC_CONSTANT_OP);
459 writer.end_op(opcode);
462 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id arg_id)
464 Id result_id = begin_expression(opcode, type_id, 1);
465 writer.write(arg_id);
466 end_expression(opcode);
470 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id left_id, Id right_id)
472 Id result_id = begin_expression(opcode, type_id, 2);
473 writer.write(left_id);
474 writer.write(right_id);
475 end_expression(opcode);
479 void SpirVGenerator::write_deconstruct(Id elem_type_id, Id composite_id, Id *elem_ids, unsigned n_elems)
481 for(unsigned i=0; i<n_elems; ++i)
483 elem_ids[i] = begin_expression(OP_COMPOSITE_EXTRACT, elem_type_id, 2);
484 writer.write(composite_id);
486 end_expression(OP_COMPOSITE_EXTRACT);
490 SpirVGenerator::Id SpirVGenerator::write_construct(Id type_id, const Id *elem_ids, unsigned n_elems)
492 Id result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, type_id, n_elems);
493 for(unsigned i=0; i<n_elems; ++i)
494 writer.write(elem_ids[i]);
495 end_expression(OP_COMPOSITE_CONSTRUCT);
500 void SpirVGenerator::visit(Block &block)
502 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
506 void SpirVGenerator::visit(Literal &literal)
508 Id type_id = get_id(*literal.type);
510 r_expression_result_id = write_constant(type_id, get_constant_key(type_id, literal.value).int_value, true);
512 r_expression_result_id = get_constant_id(type_id, literal.value);
513 r_constant_result = true;
516 void SpirVGenerator::visit(VariableReference &var)
518 if(constant_expression || var.declaration->constant)
520 if(!var.declaration->constant)
521 throw internal_error("reference to non-constant variable in constant context");
523 r_expression_result_id = get_id(*var.declaration);
524 r_constant_result = true;
527 else if(!current_function)
528 throw internal_error("non-constant context outside a function");
530 r_constant_result = false;
533 r_composite_base = var.declaration;
534 r_expression_result_id = 0;
536 else if(assignment_source_id)
538 writer.write_op(content.function_body, OP_STORE, get_id(*var.declaration), assignment_source_id);
539 variable_load_ids[var.declaration] = assignment_source_id;
540 r_expression_result_id = assignment_source_id;
543 r_expression_result_id = get_load_id(*var.declaration);
546 void SpirVGenerator::visit(InterfaceBlockReference &iface)
548 if(!composite_access || !current_function)
549 throw internal_error("invalid interface block reference");
551 r_composite_base = iface.declaration;
552 r_expression_result_id = 0;
553 r_constant_result = false;
556 void SpirVGenerator::generate_composite_access(TypeDeclaration &result_type)
559 Id result_type_id = get_id(result_type);
560 Id access_type_id = result_type_id;
563 if(constant_expression)
564 throw internal_error("composite access through pointer in constant context");
566 Id int32_type_id = get_standard_type_id(BasicTypeDeclaration::INT, 1);
567 for(vector<unsigned>::iterator i=r_composite_chain.begin(); i!=r_composite_chain.end(); ++i)
568 *i = (*i<0x400000 ? get_constant_id(int32_type_id, static_cast<int>(*i)) : *i&0x3FFFFF);
570 /* Find the storage class of the base and obtain appropriate pointer type
572 const Declaration &base_decl = get_item(declared_ids, r_composite_base);
573 map<TypeKey, Id>::const_iterator i = pointer_type_ids.begin();
574 for(; (i!=pointer_type_ids.end() && i->second!=base_decl.type_id); ++i) ;
575 if(i==pointer_type_ids.end())
576 throw internal_error("could not find storage class");
577 access_type_id = get_pointer_type_id(result_type_id, static_cast<StorageClass>(i->first.detail));
579 opcode = OP_ACCESS_CHAIN;
581 else if(assignment_source_id)
582 throw internal_error("assignment to temporary composite");
585 for(vector<unsigned>::iterator i=r_composite_chain.begin(); i!=r_composite_chain.end(); ++i)
586 for(map<ConstantKey, Id>::iterator j=constant_ids.begin(); (*i>=0x400000 && j!=constant_ids.end()); ++j)
587 if(j->second==(*i&0x3FFFFF))
588 *i = j->first.int_value;
590 opcode = OP_COMPOSITE_EXTRACT;
593 Id access_id = begin_expression(opcode, access_type_id, 1+r_composite_chain.size());
594 writer.write(r_composite_base_id);
595 for(vector<unsigned>::const_iterator i=r_composite_chain.begin(); i!=r_composite_chain.end(); ++i)
597 end_expression(opcode);
599 r_constant_result = false;
602 if(assignment_source_id)
604 writer.write_op(content.function_body, OP_STORE, access_id, assignment_source_id);
605 r_expression_result_id = assignment_source_id;
608 r_expression_result_id = write_expression(OP_LOAD, result_type_id, access_id);
611 r_expression_result_id = access_id;
614 void SpirVGenerator::visit_composite(Expression &base_expr, unsigned index, TypeDeclaration &type)
616 if(!composite_access)
618 r_composite_base = 0;
619 r_composite_base_id = 0;
620 r_composite_chain.clear();
624 SetFlag set_composite(composite_access);
625 base_expr.visit(*this);
628 if(!r_composite_base_id)
629 r_composite_base_id = (r_composite_base ? get_id(*r_composite_base) : r_expression_result_id);
631 r_composite_chain.push_back(index);
632 if(!composite_access)
633 generate_composite_access(type);
635 r_expression_result_id = 0;
638 void SpirVGenerator::visit_isolated(Expression &expr)
640 SetForScope<Id> clear_assign(assignment_source_id, 0);
641 SetFlag clear_composite(composite_access, false);
642 SetForScope<Node *> clear_base(r_composite_base, 0);
643 SetForScope<Id> clear_base_id(r_composite_base_id, 0);
644 vector<unsigned> saved_chain;
645 swap(saved_chain, r_composite_chain);
647 swap(saved_chain, r_composite_chain);
650 void SpirVGenerator::visit(MemberAccess &memacc)
652 visit_composite(*memacc.left, memacc.index, *memacc.type);
655 void SpirVGenerator::visit(Swizzle &swizzle)
658 visit_composite(*swizzle.left, swizzle.components[0], *swizzle.type);
659 else if(assignment_source_id)
661 const BasicTypeDeclaration &basic = dynamic_cast<const BasicTypeDeclaration &>(*swizzle.left->type);
664 for(unsigned i=0; i<swizzle.count; ++i)
665 mask |= 1<<swizzle.components[i];
667 visit_isolated(*swizzle.left);
669 Id combined_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.left->type), 2+basic.size);
670 writer.write(r_expression_result_id);
671 writer.write(assignment_source_id);
672 for(unsigned i=0; i<basic.size; ++i)
673 writer.write(i+((mask>>i)&1)*basic.size);
674 end_expression(OP_VECTOR_SHUFFLE);
676 SetForScope<Id> set_assign(assignment_source_id, combined_id);
677 swizzle.left->visit(*this);
679 r_expression_result_id = combined_id;
683 swizzle.left->visit(*this);
684 Id left_id = r_expression_result_id;
686 r_expression_result_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.type), 2+swizzle.count);
687 writer.write(left_id);
688 writer.write(left_id);
689 for(unsigned i=0; i<swizzle.count; ++i)
690 writer.write(swizzle.components[i]);
691 end_expression(OP_VECTOR_SHUFFLE);
693 r_constant_result = false;
696 void SpirVGenerator::visit(UnaryExpression &unary)
698 unary.expression->visit(*this);
700 char oper = unary.oper->token[0];
701 char oper2 = unary.oper->token[1];
702 if(oper=='+' && !oper2)
705 BasicTypeDeclaration &basic = dynamic_cast<BasicTypeDeclaration &>(*unary.expression->type);
706 BasicTypeDeclaration &elem = *get_element_type(basic);
708 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
709 /* SPIR-V allows constant operations on floating-point values only for
711 throw internal_error("invalid operands for constant unary expression");
713 Id result_type_id = get_id(*unary.type);
714 Opcode opcode = OP_NOP;
716 r_constant_result = false;
718 opcode = OP_LOGICAL_NOT;
721 else if(oper=='-' && !oper2)
723 opcode = (elem.kind==BasicTypeDeclaration::INT ? OP_S_NEGATE : OP_F_NEGATE);
725 if(basic.kind==BasicTypeDeclaration::MATRIX)
727 Id column_type_id = get_id(*basic.base_type);
728 unsigned n_columns = basic.size&0xFFFF;
730 write_deconstruct(column_type_id, r_expression_result_id, column_ids, n_columns);
731 for(unsigned i=0; i<n_columns; ++i)
732 column_ids[i] = write_expression(opcode, column_type_id, column_ids[i]);
733 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
737 else if((oper=='+' || oper=='-') && oper2==oper)
739 if(constant_expression)
740 throw internal_error("increment or decrement in constant expression");
743 if(elem.kind==BasicTypeDeclaration::INT)
745 opcode = (oper=='+' ? OP_I_ADD : OP_I_SUB);
746 one_id = get_constant_id(get_id(elem), 1);
748 else if(elem.kind==BasicTypeDeclaration::FLOAT)
750 opcode = (oper=='+' ? OP_F_ADD : OP_F_SUB);
751 one_id = get_constant_id(get_id(elem), 1.0f);
754 throw internal_error("invalid increment/decrement");
756 if(basic.kind==BasicTypeDeclaration::VECTOR)
757 one_id = get_vector_constant_id(result_type_id, basic.size, one_id);
759 Id post_value_id = write_expression(opcode, result_type_id, r_expression_result_id, one_id);
761 SetForScope<Id> set_assign(assignment_source_id, post_value_id);
762 unary.expression->visit(*this);
764 r_expression_result_id = (unary.oper->type==Operator::POSTFIX ? r_expression_result_id : post_value_id);
769 throw internal_error("unknown unary operator");
771 r_expression_result_id = write_expression(opcode, result_type_id, r_expression_result_id);
774 void SpirVGenerator::visit(BinaryExpression &binary)
776 char oper = binary.oper->token[0];
779 visit_isolated(*binary.right);
780 return visit_composite(*binary.left, 0x400000|r_expression_result_id, *binary.type);
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(constant_expression)
1008 ternary.condition->visit(*this);
1009 Id condition_id = r_expression_result_id;
1010 ternary.true_expr->visit(*this);
1011 Id true_result_id = r_expression_result_id;
1012 ternary.false_expr->visit(*this);
1013 Id false_result_id = r_expression_result_id;
1015 r_expression_result_id = begin_expression(OP_SELECT, get_id(*ternary.type), 3);
1016 writer.write(condition_id);
1017 writer.write(true_result_id);
1018 writer.write(false_result_id);
1019 end_expression(OP_SELECT);
1024 ternary.condition->visit(*this);
1025 Id condition_id = r_expression_result_id;
1027 Id true_label_id = next_id++;
1028 Id false_label_id = next_id++;
1029 Id merge_block_id = next_id++;
1030 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1031 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, condition_id, true_label_id, false_label_id);
1033 writer.write_op_label(true_label_id);
1034 ternary.true_expr->visit(*this);
1035 Id true_result_id = r_expression_result_id;
1036 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1038 writer.write_op_label(false_label_id);
1039 ternary.false_expr->visit(*this);
1040 Id false_result_id = r_expression_result_id;
1042 writer.write_op_label(merge_block_id);
1043 r_expression_result_id = begin_expression(OP_PHI, get_id(*ternary.type), 4);
1044 writer.write(true_result_id);
1045 writer.write(true_label_id);
1046 writer.write(false_result_id);
1047 writer.write(false_label_id);
1048 end_expression(OP_PHI);
1050 r_constant_result = false;
1053 void SpirVGenerator::visit(FunctionCall &call)
1055 if(assignment_source_id)
1056 throw internal_error("assignment to function call");
1057 else if(composite_access)
1058 return visit_isolated(call);
1059 else if(call.constructor && call.arguments.size()==1 && call.arguments[0]->type==call.type)
1060 return call.arguments[0]->visit(*this);
1062 vector<Id> argument_ids;
1063 argument_ids.reserve(call.arguments.size());
1064 bool all_args_const = true;
1065 for(NodeArray<Expression>::const_iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1068 argument_ids.push_back(r_expression_result_id);
1069 all_args_const &= r_constant_result;
1072 if(constant_expression && (!call.constructor || !all_args_const))
1073 throw internal_error("function call in constant expression");
1075 Id result_type_id = get_id(*call.type);
1076 r_constant_result = false;
1078 if(call.constructor)
1079 visit_constructor(call, argument_ids, all_args_const);
1080 else if(call.declaration->source==BUILTIN_SOURCE)
1083 for(NodeArray<Expression>::const_iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
1084 if(BasicTypeDeclaration *basic_arg = dynamic_cast<BasicTypeDeclaration *>((*i)->type))
1086 BasicTypeDeclaration &elem_arg = *get_element_type(*basic_arg);
1087 switch(elem_arg.kind)
1089 case BasicTypeDeclaration::BOOL: arg_types += 'b'; break;
1090 case BasicTypeDeclaration::INT: arg_types += (elem_arg.sign ? 'i' : 'u'); break;
1091 case BasicTypeDeclaration::FLOAT: arg_types += 'f'; break;
1092 default: arg_types += '?';
1096 const BuiltinFunctionInfo *builtin_info;
1097 for(builtin_info=builtin_functions; builtin_info->function[0]; ++builtin_info)
1098 if(builtin_info->function==call.name && (!builtin_info->arg_types[0] || builtin_info->arg_types==arg_types))
1101 if(builtin_info->capability)
1102 use_capability(static_cast<Capability>(builtin_info->capability));
1104 if(builtin_info->opcode)
1107 if(builtin_info->extension[0])
1109 opcode = OP_EXT_INST;
1110 Id ext_id = import_extension(builtin_info->extension);
1112 r_expression_result_id = begin_expression(opcode, result_type_id);
1113 writer.write(ext_id);
1114 writer.write(builtin_info->opcode);
1118 opcode = static_cast<Opcode>(builtin_info->opcode);
1119 r_expression_result_id = begin_expression(opcode, result_type_id);
1122 for(unsigned i=0; i<call.arguments.size(); ++i)
1124 if(!builtin_info->arg_order[i] || builtin_info->arg_order[i]>argument_ids.size())
1125 throw internal_error("invalid builtin function info");
1126 writer.write(argument_ids[builtin_info->arg_order[i]-1]);
1129 end_expression(opcode);
1131 else if(builtin_info->handler)
1132 (this->*(builtin_info->handler))(call, argument_ids);
1134 throw internal_error("unknown builtin function "+call.name);
1138 r_expression_result_id = begin_expression(OP_FUNCTION_CALL, result_type_id, 1+call.arguments.size());
1139 writer.write(get_id(*call.declaration->definition));
1140 for(vector<Id>::const_iterator i=argument_ids.begin(); i!=argument_ids.end(); ++i)
1142 end_expression(OP_FUNCTION_CALL);
1144 // Any global variables the called function uses might have changed value
1145 set<Node *> dependencies = DependencyCollector().apply(*call.declaration->definition);
1146 for(set<Node *>::const_iterator i=dependencies.begin(); i!=dependencies.end(); ++i)
1147 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(*i))
1148 variable_load_ids.erase(var);
1152 void SpirVGenerator::visit_constructor(FunctionCall &call, const vector<Id> &argument_ids, bool all_args_const)
1154 Id result_type_id = get_id(*call.type);
1156 BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(call.type);
1159 if(dynamic_cast<const StructDeclaration *>(call.type))
1160 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1162 throw internal_error("unconstructable type "+call.name);
1166 SetFlag set_const(constant_expression, constant_expression || all_args_const);
1168 BasicTypeDeclaration &elem = *get_element_type(*basic);
1169 BasicTypeDeclaration &basic_arg0 = dynamic_cast<BasicTypeDeclaration &>(*call.arguments[0]->type);
1170 BasicTypeDeclaration &elem_arg0 = *get_element_type(basic_arg0);
1172 if(basic->kind==BasicTypeDeclaration::MATRIX)
1174 Id col_type_id = get_id(*basic->base_type);
1175 unsigned n_columns = basic->size&0xFFFF;
1176 unsigned n_rows = basic->size>>16;
1179 if(call.arguments.size()==1)
1181 // Construct diagonal matrix from a single scalar.
1182 Id zero_id = get_constant_id(get_id(elem), 0.0f);
1183 for(unsigned i=0; i<n_columns; ++i)
1185 column_ids[i] = begin_expression(OP_COMPOSITE_CONSTRUCT, col_type_id, n_rows);
1186 for(unsigned j=0; j<n_rows; ++j)
1187 writer.write(j==i ? argument_ids[0] : zero_id);
1188 end_expression(OP_COMPOSITE_CONSTRUCT);
1192 // Construct a matrix from column vectors
1193 copy(argument_ids.begin(), argument_ids.begin()+n_columns, column_ids);
1195 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
1197 else if(basic->kind==BasicTypeDeclaration::VECTOR && (call.arguments.size()>1 || basic_arg0.kind!=BasicTypeDeclaration::VECTOR))
1199 /* There's either a single scalar argument or multiple arguments
1200 which make up the vector's components. */
1201 if(call.arguments.size()==1)
1203 r_expression_result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, result_type_id);
1204 for(unsigned i=0; i<basic->size; ++i)
1205 writer.write(argument_ids[0]);
1206 end_expression(OP_COMPOSITE_CONSTRUCT);
1209 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1211 else if(elem.kind==BasicTypeDeclaration::BOOL)
1213 if(constant_expression)
1214 throw internal_error("unconverted constant");
1216 // Conversion to boolean is implemented as comparing against zero.
1217 Id number_type_id = get_id(elem_arg0);
1218 Id zero_id = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ?
1219 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1220 if(basic_arg0.kind==BasicTypeDeclaration::VECTOR)
1221 zero_id = get_vector_constant_id(get_id(basic_arg0), basic_arg0.size, zero_id);
1223 Opcode opcode = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ? OP_F_ORD_NOT_EQUAL : OP_I_NOT_EQUAL);
1224 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0], zero_id);
1226 else if(elem_arg0.kind==BasicTypeDeclaration::BOOL)
1228 if(constant_expression)
1229 throw internal_error("unconverted constant");
1231 /* Conversion from boolean is implemented as selecting from zero
1233 Id number_type_id = get_id(elem);
1234 Id zero_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1235 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1236 Id one_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1237 get_constant_id(number_type_id, 1.0f) : get_constant_id(number_type_id, 1));
1238 if(basic->kind==BasicTypeDeclaration::VECTOR)
1240 zero_id = get_vector_constant_id(get_id(*basic), basic->size, zero_id);
1241 one_id = get_vector_constant_id(get_id(*basic), basic->size, one_id);
1244 r_expression_result_id = begin_expression(OP_SELECT, result_type_id, 3);
1245 writer.write(argument_ids[0]);
1246 writer.write(zero_id);
1247 writer.write(one_id);
1248 end_expression(OP_SELECT);
1252 if(constant_expression)
1253 throw internal_error("unconverted constant");
1255 // Scalar or vector conversion between types of equal size.
1257 if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::FLOAT)
1258 opcode = (elem.sign ? OP_CONVERT_F_TO_S : OP_CONVERT_F_TO_U);
1259 else if(elem.kind==BasicTypeDeclaration::FLOAT && elem_arg0.kind==BasicTypeDeclaration::INT)
1260 opcode = (elem_arg0.sign ? OP_CONVERT_S_TO_F : OP_CONVERT_U_TO_F);
1261 else if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::INT)
1262 opcode = OP_BITCAST;
1264 throw internal_error("invalid conversion");
1266 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0]);
1270 void SpirVGenerator::visit_builtin_matrix_comp_mult(FunctionCall &call, const vector<Id> &argument_ids)
1272 if(argument_ids.size()!=2)
1273 throw internal_error("invalid matrixCompMult call");
1275 const BasicTypeDeclaration &basic_arg0 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[0]->type);
1276 Id column_type_id = get_id(*basic_arg0.base_type);
1279 unsigned n_columns = basic_arg0.size&0xFFFF;
1280 write_deconstruct(column_type_id, argument_ids[0], column_ids, n_columns);
1281 write_deconstruct(column_type_id, argument_ids[1], column_ids+4, n_columns);
1283 for(unsigned i=0; i<n_columns; ++i)
1284 column_ids[i] = write_expression(OP_F_MUL, column_type_id, column_ids[i], column_ids[4+i]);
1286 r_expression_result_id = write_construct(get_id(*call.type), column_ids, n_columns);
1289 void SpirVGenerator::visit_builtin_texture_query(FunctionCall &call, const vector<Id> &argument_ids)
1291 if(argument_ids.size()<1)
1292 throw internal_error("invalid texture query call");
1295 if(call.name=="textureSize")
1296 opcode = OP_IMAGE_QUERY_SIZE_LOD;
1297 else if(call.name=="textureQueryLod")
1298 opcode = OP_IMAGE_QUERY_LOD;
1299 else if(call.name=="textureQueryLevels")
1300 opcode = OP_IMAGE_QUERY_LEVELS;
1302 throw internal_error("invalid texture query call");
1304 ImageTypeDeclaration &image_arg0 = dynamic_cast<ImageTypeDeclaration &>(*call.arguments[0]->type);
1307 if(image_arg0.sampled)
1309 Id image_type_id = get_item(image_type_ids, get_id(image_arg0));
1310 image_id = write_expression(OP_IMAGE, image_type_id, argument_ids[0]);
1313 image_id = argument_ids[0];
1315 Id result_type_id = get_id(*call.type);
1316 r_expression_result_id = begin_expression(opcode, result_type_id, argument_ids.size());
1317 writer.write(image_id);
1318 for(unsigned i=1; i<argument_ids.size(); ++i)
1319 writer.write(argument_ids[i]);
1320 end_expression(opcode);
1323 void SpirVGenerator::visit_builtin_texture(FunctionCall &call, const vector<Id> &argument_ids)
1325 if(argument_ids.size()<2)
1326 throw internal_error("invalid texture sampling call");
1328 bool explicit_lod = (stage->type!=Stage::FRAGMENT || call.name=="textureLod");
1329 Id lod_id = (!explicit_lod ? 0 : call.name=="textureLod" ? argument_ids.back() :
1330 get_constant_id(get_standard_type_id(BasicTypeDeclaration::FLOAT, 1), 0.0f));
1332 const ImageTypeDeclaration &image = dynamic_cast<const ImageTypeDeclaration &>(*call.arguments[0]->type);
1335 Id result_type_id = get_id(*call.type);
1339 if(argument_ids.size()==2)
1341 const BasicTypeDeclaration &basic_arg1 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[1]->type);
1342 dref_id = begin_expression(OP_COMPOSITE_EXTRACT, get_id(*basic_arg1.base_type), 2);
1343 writer.write(argument_ids.back());
1344 writer.write(basic_arg1.size-1);
1345 end_expression(OP_COMPOSITE_EXTRACT);
1348 dref_id = argument_ids[2];
1350 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_DREF_EXPLICIT_LOD : OP_IMAGE_SAMPLE_DREF_IMPLICIT_LOD);
1351 r_expression_result_id = begin_expression(opcode, result_type_id, 3+explicit_lod*2);
1355 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_EXPLICIT_LOD : OP_IMAGE_SAMPLE_IMPLICIT_LOD);
1356 r_expression_result_id = begin_expression(opcode, result_type_id, 2+explicit_lod*2);
1359 for(unsigned i=0; i<2; ++i)
1360 writer.write(argument_ids[i]);
1362 writer.write(dref_id);
1365 writer.write(2); // Lod
1366 writer.write(lod_id);
1369 end_expression(opcode);
1372 void SpirVGenerator::visit_builtin_texel_fetch(FunctionCall &call, const vector<Id> &argument_ids)
1374 if(argument_ids.size()!=3)
1375 throw internal_error("invalid texelFetch call");
1377 r_expression_result_id = begin_expression(OP_IMAGE_FETCH, get_id(*call.type), 4);
1378 for(unsigned i=0; i<2; ++i)
1379 writer.write(argument_ids[i]);
1380 writer.write(2); // Lod
1381 writer.write(argument_ids.back());
1382 end_expression(OP_IMAGE_FETCH);
1385 void SpirVGenerator::visit_builtin_interpolate(FunctionCall &call, const vector<Id> &argument_ids)
1387 if(argument_ids.size()<1)
1388 throw internal_error("invalid interpolate call");
1389 const VariableReference *var = dynamic_cast<const VariableReference *>(call.arguments[0].get());
1390 if(!var || !var->declaration || var->declaration->interface!="in")
1391 throw internal_error("invalid interpolate call");
1393 SpirVGlslStd450Opcode opcode;
1394 if(call.name=="interpolateAtCentroid")
1395 opcode = GLSL450_INTERPOLATE_AT_CENTROID;
1396 else if(call.name=="interpolateAtSample")
1397 opcode = GLSL450_INTERPOLATE_AT_SAMPLE;
1398 else if(call.name=="interpolateAtOffset")
1399 opcode = GLSL450_INTERPOLATE_AT_OFFSET;
1401 throw internal_error("invalid interpolate call");
1403 Id ext_id = import_extension("GLSL.std.450");
1404 r_expression_result_id = begin_expression(OP_EXT_INST, get_id(*call.type));
1405 writer.write(ext_id);
1406 writer.write(opcode);
1407 writer.write(get_id(*var->declaration));
1408 for(vector<Id>::const_iterator i=argument_ids.begin(); ++i!=argument_ids.end(); )
1410 end_expression(OP_EXT_INST);
1413 void SpirVGenerator::visit(ExpressionStatement &expr)
1415 expr.expression->visit(*this);
1418 void SpirVGenerator::visit(InterfaceLayout &layout)
1420 interface_layouts.push_back(&layout);
1423 bool SpirVGenerator::check_duplicate_type(TypeDeclaration &type)
1425 for(map<Node *, Declaration>::const_iterator i=declared_ids.begin(); i!=declared_ids.end(); ++i)
1426 if(TypeDeclaration *type2 = dynamic_cast<TypeDeclaration *>(i->first))
1427 if(TypeComparer().apply(type, *type2))
1429 insert_unique(declared_ids, &type, i->second);
1436 bool SpirVGenerator::check_standard_type(BasicTypeDeclaration &basic)
1438 const BasicTypeDeclaration *elem = (basic.kind==BasicTypeDeclaration::VECTOR ?
1439 dynamic_cast<const BasicTypeDeclaration *>(basic.base_type) : &basic);
1440 if(!elem || elem->base_type)
1442 if((elem->kind==BasicTypeDeclaration::INT || elem->kind==BasicTypeDeclaration::FLOAT) && elem->size!=32)
1445 Id standard_id = get_standard_type_id(elem->kind, (basic.kind==BasicTypeDeclaration::VECTOR ? basic.size : 1), elem->sign);
1446 insert_unique(declared_ids, &basic, Declaration(standard_id, 0));
1447 writer.write_op_name(standard_id, basic.name);
1452 void SpirVGenerator::visit(BasicTypeDeclaration &basic)
1454 if(check_standard_type(basic))
1456 if(check_duplicate_type(basic))
1458 // Alias types shouldn't exist at this point and arrays are handled elsewhere
1459 if(basic.kind==BasicTypeDeclaration::ALIAS || basic.kind==BasicTypeDeclaration::ARRAY)
1462 Id type_id = allocate_id(basic, 0);
1463 writer.write_op_name(type_id, basic.name);
1467 case BasicTypeDeclaration::INT:
1468 writer.write_op(content.globals, OP_TYPE_INT, type_id, basic.size, basic.sign);
1470 case BasicTypeDeclaration::FLOAT:
1471 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, basic.size);
1473 case BasicTypeDeclaration::VECTOR:
1474 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, get_id(*basic.base_type), basic.size);
1476 case BasicTypeDeclaration::MATRIX:
1477 writer.write_op(content.globals, OP_TYPE_MATRIX, type_id, get_id(*basic.base_type), basic.size&0xFFFF);
1480 throw internal_error("unknown basic type");
1484 void SpirVGenerator::visit(ImageTypeDeclaration &image)
1486 if(check_duplicate_type(image))
1489 Id type_id = allocate_id(image, 0);
1491 Id image_id = (image.sampled ? next_id++ : type_id);
1492 writer.begin_op(content.globals, OP_TYPE_IMAGE, 9);
1493 writer.write(image_id);
1494 writer.write(get_id(*image.base_type));
1495 writer.write(image.dimensions-1);
1496 writer.write(image.shadow);
1497 writer.write(image.array);
1498 writer.write(false); // Multisample
1499 writer.write(image.sampled ? 1 : 2);
1500 writer.write(0); // Format (unknown)
1501 writer.end_op(OP_TYPE_IMAGE);
1505 writer.write_op_name(type_id, image.name);
1506 writer.write_op(content.globals, OP_TYPE_SAMPLED_IMAGE, type_id, image_id);
1507 insert_unique(image_type_ids, type_id, image_id);
1510 if(image.dimensions==ImageTypeDeclaration::ONE)
1511 use_capability(image.sampled ? CAP_SAMPLED_1D : CAP_IMAGE_1D);
1512 else if(image.dimensions==ImageTypeDeclaration::CUBE && image.array)
1513 use_capability(image.sampled ? CAP_SAMPLED_CUBE_ARRAY : CAP_IMAGE_CUBE_ARRAY);
1516 void SpirVGenerator::visit(StructDeclaration &strct)
1518 if(check_duplicate_type(strct))
1521 Id type_id = allocate_id(strct, 0);
1522 writer.write_op_name(type_id, strct.name);
1524 if(strct.interface_block)
1525 writer.write_op_decorate(type_id, DECO_BLOCK);
1527 bool builtin = (strct.interface_block && !strct.interface_block->block_name.compare(0, 3, "gl_"));
1528 vector<Id> member_type_ids;
1529 member_type_ids.reserve(strct.members.body.size());
1530 for(NodeList<Statement>::const_iterator i=strct.members.body.begin(); i!=strct.members.body.end(); ++i)
1532 const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(i->get());
1536 unsigned index = member_type_ids.size();
1537 member_type_ids.push_back(get_variable_type_id(*var));
1539 writer.write_op_member_name(type_id, index, var->name);
1543 BuiltinSemantic semantic = get_builtin_semantic(var->name);
1544 writer.write_op_member_decorate(type_id, index, DECO_BUILTIN, semantic);
1550 const vector<Layout::Qualifier> &qualifiers = var->layout->qualifiers;
1551 for(vector<Layout::Qualifier>::const_iterator j=qualifiers.begin(); j!=qualifiers.end(); ++j)
1553 if(j->name=="offset")
1554 writer.write_op_member_decorate(type_id, index, DECO_OFFSET, j->value);
1555 else if(j->name=="column_major")
1556 writer.write_op_member_decorate(type_id, index, DECO_COL_MAJOR);
1557 else if(j->name=="row_major")
1558 writer.write_op_member_decorate(type_id, index, DECO_ROW_MAJOR);
1562 const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var->type_declaration);
1563 while(basic && basic->kind==BasicTypeDeclaration::ARRAY)
1564 basic = dynamic_cast<const BasicTypeDeclaration *>(basic->base_type);
1565 if(basic && basic->kind==BasicTypeDeclaration::MATRIX)
1567 unsigned stride = MemoryRequirementsCalculator().apply(*basic->base_type).stride;
1568 writer.write_op_member_decorate(type_id, index, DECO_MATRIX_STRIDE, stride);
1573 writer.begin_op(content.globals, OP_TYPE_STRUCT);
1574 writer.write(type_id);
1575 for(vector<Id>::const_iterator i=member_type_ids.begin(); i!=member_type_ids.end(); ++i)
1577 writer.end_op(OP_TYPE_STRUCT);
1580 void SpirVGenerator::visit(VariableDeclaration &var)
1582 const vector<Layout::Qualifier> *layout_ql = (var.layout ? &var.layout->qualifiers : 0);
1587 for(vector<Layout::Qualifier>::const_iterator i=layout_ql->begin(); (spec_id<0 && i!=layout_ql->end()); ++i)
1588 if(i->name=="constant_id")
1592 Id type_id = get_variable_type_id(var);
1597 if(!var.init_expression)
1598 throw internal_error("const variable without initializer");
1600 SetFlag set_const(constant_expression);
1601 SetFlag set_spec(spec_constant, spec_id>=0);
1602 r_expression_result_id = 0;
1603 var.init_expression->visit(*this);
1604 var_id = r_expression_result_id;
1605 insert_unique(declared_ids, &var, Declaration(var_id, type_id));
1606 writer.write_op_decorate(var_id, DECO_SPEC_ID, spec_id);
1608 /* It's unclear what should be done if a specialization constant is
1609 initialized with anything other than a literal. GLSL doesn't seem to
1610 prohibit that but SPIR-V says OpSpecConstantOp can't be updated via
1615 StorageClass storage = (current_function ? STORAGE_FUNCTION : get_interface_storage(var.interface, false));
1616 Id ptr_type_id = get_pointer_type_id(type_id, storage);
1617 if(var.interface=="uniform")
1619 Id &uni_id = declared_uniform_ids["v"+var.name];
1622 insert_unique(declared_ids, &var, Declaration(uni_id, ptr_type_id));
1626 uni_id = var_id = allocate_id(var, ptr_type_id);
1629 var_id = allocate_id(var, (var.constant ? type_id : ptr_type_id));
1632 if(var.init_expression)
1634 SetFlag set_const(constant_expression, !current_function);
1635 r_expression_result_id = 0;
1636 r_constant_result = false;
1637 var.init_expression->visit(*this);
1638 init_id = r_expression_result_id;
1641 vector<Word> &target = (current_function ? content.locals : content.globals);
1642 writer.begin_op(target, OP_VARIABLE, 4+(init_id && !current_function));
1643 writer.write(ptr_type_id);
1644 writer.write(var_id);
1645 writer.write(storage);
1646 if(init_id && !current_function)
1647 writer.write(init_id);
1648 writer.end_op(OP_VARIABLE);
1652 for(vector<Layout::Qualifier>::const_iterator i=layout_ql->begin(); i!=layout_ql->end(); ++i)
1654 if(i->name=="location")
1655 writer.write_op_decorate(var_id, DECO_LOCATION, i->value);
1656 else if(i->name=="set")
1657 writer.write_op_decorate(var_id, DECO_DESCRIPTOR_SET, i->value);
1658 else if(i->name=="binding")
1659 writer.write_op_decorate(var_id, DECO_BINDING, i->value);
1663 if(init_id && current_function)
1665 writer.write_op(content.function_body, OP_STORE, var_id, init_id);
1666 variable_load_ids[&var] = init_id;
1670 writer.write_op_name(var_id, var.name);
1673 void SpirVGenerator::visit(InterfaceBlock &iface)
1675 StorageClass storage = get_interface_storage(iface.interface, true);
1678 type_id = get_array_type_id(*iface.struct_declaration, 0);
1680 type_id = get_id(*iface.struct_declaration);
1681 Id ptr_type_id = get_pointer_type_id(type_id, storage);
1684 if(iface.interface=="uniform")
1686 Id &uni_id = declared_uniform_ids["b"+iface.block_name];
1689 insert_unique(declared_ids, &iface, Declaration(uni_id, ptr_type_id));
1693 uni_id = block_id = allocate_id(iface, ptr_type_id);
1696 block_id = allocate_id(iface, ptr_type_id);
1697 writer.write_op_name(block_id, iface.instance_name);
1699 writer.write_op(content.globals, OP_VARIABLE, ptr_type_id, block_id, storage);
1703 const vector<Layout::Qualifier> &qualifiers = iface.layout->qualifiers;
1704 for(vector<Layout::Qualifier>::const_iterator i=qualifiers.begin(); i!=qualifiers.end(); ++i)
1705 if(i->name=="binding")
1706 writer.write_op_decorate(block_id, DECO_BINDING, i->value);
1710 void SpirVGenerator::visit_entry_point(FunctionDeclaration &func, Id func_id)
1712 writer.begin_op(content.entry_points, OP_ENTRY_POINT);
1715 case Stage::VERTEX: writer.write(0); break;
1716 case Stage::GEOMETRY: writer.write(3); break;
1717 case Stage::FRAGMENT: writer.write(4); break;
1718 default: throw internal_error("unknown stage");
1720 writer.write(func_id);
1721 writer.write_string(func.name);
1723 set<Node *> dependencies = DependencyCollector().apply(func);
1724 for(set<Node *>::const_iterator i=dependencies.begin(); i!=dependencies.end(); ++i)
1726 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(*i))
1728 if(!var->interface.empty())
1729 writer.write(get_id(**i));
1731 else if(dynamic_cast<InterfaceBlock *>(*i))
1732 writer.write(get_id(**i));
1735 writer.end_op(OP_ENTRY_POINT);
1737 if(stage->type==Stage::FRAGMENT)
1738 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_ORIGIN_LOWER_LEFT);
1739 else if(stage->type==Stage::GEOMETRY)
1740 use_capability(CAP_GEOMETRY);
1742 for(vector<const InterfaceLayout *>::const_iterator i=interface_layouts.begin(); i!=interface_layouts.end(); ++i)
1744 const vector<Layout::Qualifier> &qualifiers = (*i)->layout.qualifiers;
1745 for(vector<Layout::Qualifier>::const_iterator j=qualifiers.begin(); j!=qualifiers.end(); ++j)
1747 if(j->name=="point")
1748 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id,
1749 ((*i)->interface=="in" ? EXEC_INPUT_POINTS : EXEC_OUTPUT_POINTS));
1750 else if(j->name=="lines")
1751 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES);
1752 else if(j->name=="lines_adjacency")
1753 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES_ADJACENCY);
1754 else if(j->name=="triangles")
1755 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_TRIANGLES);
1756 else if(j->name=="triangles_adjacency")
1757 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_TRIANGLES_ADJACENCY);
1758 else if(j->name=="line_strip")
1759 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_LINE_STRIP);
1760 else if(j->name=="triangle_strip")
1761 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_TRIANGLE_STRIP);
1762 else if(j->name=="max_vertices")
1763 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_VERTICES, j->value);
1768 void SpirVGenerator::visit(FunctionDeclaration &func)
1770 if(func.source==BUILTIN_SOURCE)
1772 else if(func.definition!=&func)
1775 allocate_forward_id(*func.definition);
1779 Id return_type_id = get_id(*func.return_type_declaration);
1780 vector<unsigned> param_type_ids;
1781 param_type_ids.reserve(func.parameters.size());
1782 for(NodeArray<VariableDeclaration>::const_iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
1783 param_type_ids.push_back(get_variable_type_id(**i));
1785 string sig_with_return = func.return_type+func.signature;
1786 Id &type_id = function_type_ids[sig_with_return];
1789 type_id = next_id++;
1790 writer.begin_op(content.globals, OP_TYPE_FUNCTION);
1791 writer.write(type_id);
1792 writer.write(return_type_id);
1793 for(vector<unsigned>::const_iterator i=param_type_ids.begin(); i!=param_type_ids.end(); ++i)
1795 writer.end_op(OP_TYPE_FUNCTION);
1797 writer.write_op_name(type_id, sig_with_return);
1800 Id func_id = allocate_id(func, type_id);
1801 writer.write_op_name(func_id, func.name+func.signature);
1803 if(func.name=="main")
1804 visit_entry_point(func, func_id);
1806 writer.begin_op(content.functions, OP_FUNCTION, 5);
1807 writer.write(return_type_id);
1808 writer.write(func_id);
1809 writer.write(0); // Function control flags (none)
1810 writer.write(type_id);
1811 writer.end_op(OP_FUNCTION);
1813 for(unsigned i=0; i<func.parameters.size(); ++i)
1815 Id param_id = allocate_id(*func.parameters[i], param_type_ids[i]);
1816 writer.write_op(content.functions, OP_FUNCTION_PARAMETER, param_type_ids[i], param_id);
1817 // TODO This is probably incorrect if the parameter is assigned to.
1818 variable_load_ids[func.parameters[i].get()] = param_id;
1821 writer.begin_function_body(next_id++);
1822 SetForScope<FunctionDeclaration *> set_func(current_function, &func);
1823 func.body.visit(*this);
1825 if(writer.has_current_block())
1828 writer.write_op(content.function_body, OP_UNREACHABLE);
1831 const BasicTypeDeclaration *basic_return = dynamic_cast<const BasicTypeDeclaration *>(func.return_type_declaration);
1832 if(basic_return && basic_return->kind==BasicTypeDeclaration::VOID)
1833 writer.write_op(content.function_body, OP_RETURN);
1835 throw internal_error("missing return in non-void function");
1838 writer.end_function_body();
1839 variable_load_ids.clear();
1842 void SpirVGenerator::visit(Conditional &cond)
1844 cond.condition->visit(*this);
1846 Id true_label_id = next_id++;
1847 Id merge_block_id = next_id++;
1848 Id false_label_id = (cond.else_body.body.empty() ? merge_block_id : next_id++);
1849 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1850 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, true_label_id, false_label_id);
1852 writer.write_op_label(true_label_id);
1853 cond.body.visit(*this);
1854 if(writer.has_current_block())
1855 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1857 bool reachable_if_true = reachable;
1860 if(!cond.else_body.body.empty())
1862 writer.write_op_label(false_label_id);
1863 cond.else_body.visit(*this);
1864 reachable |= reachable_if_true;
1867 writer.write_op_label(merge_block_id);
1868 prune_loads(true_label_id);
1871 void SpirVGenerator::visit(Iteration &iter)
1873 if(iter.init_statement)
1874 iter.init_statement->visit(*this);
1876 variable_load_ids.clear();
1878 Id header_id = next_id++;
1879 Id continue_id = next_id++;
1880 Id merge_block_id = next_id++;
1882 SetForScope<Id> set_merge(loop_merge_block_id, merge_block_id);
1883 SetForScope<Id> set_continue(loop_continue_target_id, continue_id);
1885 writer.write_op_label(header_id);
1886 writer.write_op(content.function_body, OP_LOOP_MERGE, merge_block_id, continue_id, 0); // Loop control (none)
1888 Id body_id = next_id++;
1891 writer.write_op_label(next_id++);
1892 iter.condition->visit(*this);
1893 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, body_id, merge_block_id);
1896 writer.write_op_label(body_id);
1897 iter.body.visit(*this);
1899 writer.write_op_label(continue_id);
1900 if(iter.loop_expression)
1901 iter.loop_expression->visit(*this);
1902 writer.write_op(content.function_body, OP_BRANCH, header_id);
1904 writer.write_op_label(merge_block_id);
1905 prune_loads(header_id);
1909 void SpirVGenerator::visit(Return &ret)
1913 ret.expression->visit(*this);
1914 writer.write_op(content.function_body, OP_RETURN_VALUE, r_expression_result_id);
1917 writer.write_op(content.function_body, OP_RETURN);
1921 void SpirVGenerator::visit(Jump &jump)
1923 if(jump.keyword=="discard")
1924 writer.write_op(content.function_body, OP_KILL);
1925 else if(jump.keyword=="break")
1926 writer.write_op(content.function_body, OP_BRANCH, loop_merge_block_id);
1927 else if(jump.keyword=="continue")
1928 writer.write_op(content.function_body, OP_BRANCH, loop_continue_target_id);
1930 throw internal_error("unknown jump");
1935 SpirVGenerator::TypeKey::TypeKey(BasicTypeDeclaration::Kind kind, bool sign):
1940 case BasicTypeDeclaration::VOID: detail = 'v'; break;
1941 case BasicTypeDeclaration::BOOL: detail = 'b'; break;
1942 case BasicTypeDeclaration::INT: detail = (sign ? 'i' : 'u'); break;
1943 case BasicTypeDeclaration::FLOAT: detail = 'f'; break;
1944 default: throw invalid_argument("TypeKey::TypeKey");
1948 bool SpirVGenerator::TypeKey::operator<(const TypeKey &other) const
1950 if(type_id!=other.type_id)
1951 return type_id<other.type_id;
1952 return detail<other.detail;
1956 bool SpirVGenerator::ConstantKey::operator<(const ConstantKey &other) const
1958 if(type_id!=other.type_id)
1959 return type_id<other.type_id;
1960 return int_value<other.int_value;