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 { "textureSamples", "", "", 0, { }, CAP_IMAGE_QUERY, &SpirVGenerator::visit_builtin_texture_query },
115 { "texture", "", "", 0, { }, 0, &SpirVGenerator::visit_builtin_texture },
116 { "textureLod", "", "", 0, { }, 0, &SpirVGenerator::visit_builtin_texture },
117 { "texelFetch", "", "", 0, { }, 0, &SpirVGenerator::visit_builtin_texture_fetch },
118 { "imageSize", "", "", 0, { }, CAP_IMAGE_QUERY, &SpirVGenerator::visit_builtin_texture_query },
119 { "imageSamples", "", "", 0, { }, CAP_IMAGE_QUERY, &SpirVGenerator::visit_builtin_texture_query },
120 { "imageLoad", "", "", 0, { }, 0, &SpirVGenerator::visit_builtin_texture_fetch },
121 { "imageStore", "", "", 0, { }, 0, &SpirVGenerator::visit_builtin_texture_store },
122 { "EmitVertex", "", "", OP_EMIT_VERTEX, { }, 0, 0 },
123 { "EndPrimitive", "", "", OP_END_PRIMITIVE, { }, 0, 0 },
124 { "dFdx", "f", "", OP_DP_DX, { 1 }, 0, 0 },
125 { "dFdy", "f", "", OP_DP_DY, { 1 }, 0, 0 },
126 { "dFdxFine", "f", "", OP_DP_DX_FINE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
127 { "dFdyFine", "f", "", OP_DP_DY_FINE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
128 { "dFdxCoarse", "f", "", OP_DP_DX_COARSE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
129 { "dFdyCoarse", "f", "", OP_DP_DY_COARSE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
130 { "fwidth", "f", "", OP_FWIDTH, { 1 }, 0, 0 },
131 { "fwidthFine", "f", "", OP_FWIDTH_FINE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
132 { "fwidthCoarse", "f", "", OP_FWIDTH_COARSE, { 1 }, CAP_DERIVATIVE_CONTROL, 0 },
133 { "interpolateAtCentroid", "", "", 0, { }, CAP_INTERPOLATION_FUNCTION, &SpirVGenerator::visit_builtin_interpolate },
134 { "interpolateAtSample", "", "", 0, { }, CAP_INTERPOLATION_FUNCTION, &SpirVGenerator::visit_builtin_interpolate },
135 { "interpolateAtOffset", "", "", 0, { }, CAP_INTERPOLATION_FUNCTION, &SpirVGenerator::visit_builtin_interpolate },
136 { "", "", "", 0, { }, 0, 0 }
139 SpirVGenerator::SpirVGenerator():
143 void SpirVGenerator::apply(Module &module, const Features &f)
146 use_capability(CAP_SHADER);
148 for(Stage &s: module.stages)
151 interface_layouts.clear();
152 s.content.visit(*this);
155 writer.finalize(SPIRV_GENERATOR_MSP, next_id);
158 SpirVGenerator::StorageClass SpirVGenerator::get_interface_storage(const string &iface, bool block)
161 return STORAGE_INPUT;
162 else if(iface=="out")
163 return STORAGE_OUTPUT;
164 else if(iface=="uniform")
165 return (block ? STORAGE_UNIFORM : STORAGE_UNIFORM_CONSTANT);
166 else if(iface.empty())
167 return STORAGE_PRIVATE;
169 throw invalid_argument("SpirVGenerator::get_interface_storage");
172 SpirVGenerator::BuiltinSemantic SpirVGenerator::get_builtin_semantic(const string &name)
174 if(name=="gl_Position")
175 return BUILTIN_POSITION;
176 else if(name=="gl_PointSize")
177 return BUILTIN_POINT_SIZE;
178 else if(name=="gl_ClipDistance")
179 return BUILTIN_CLIP_DISTANCE;
180 else if(name=="gl_VertexID")
181 return BUILTIN_VERTEX_ID;
182 else if(name=="gl_InstanceID")
183 return BUILTIN_INSTANCE_ID;
184 else if(name=="gl_PrimitiveID" || name=="gl_PrimitiveIDIn")
185 return BUILTIN_PRIMITIVE_ID;
186 else if(name=="gl_InvocationID")
187 return BUILTIN_INVOCATION_ID;
188 else if(name=="gl_Layer")
189 return BUILTIN_LAYER;
190 else if(name=="gl_FragCoord")
191 return BUILTIN_FRAG_COORD;
192 else if(name=="gl_PointCoord")
193 return BUILTIN_POINT_COORD;
194 else if(name=="gl_FrontFacing")
195 return BUILTIN_FRONT_FACING;
196 else if(name=="gl_SampleId")
197 return BUILTIN_SAMPLE_ID;
198 else if(name=="gl_SamplePosition")
199 return BUILTIN_SAMPLE_POSITION;
200 else if(name=="gl_FragDepth")
201 return BUILTIN_FRAG_DEPTH;
203 throw invalid_argument("SpirVGenerator::get_builtin_semantic");
206 SpirVFormat SpirVGenerator::get_format(const std::string &name)
209 return FORMAT_UNKNOWN;
210 else if(name=="rgba32f")
211 return FORMAT_RGBA32F;
212 else if(name=="rgba16f")
213 return FORMAT_RGBA16F;
214 else if(name=="r32f")
216 else if(name=="rgba8")
218 else if(name=="rgba8_snorm")
219 return FORMAT_RGBA8_SNORM;
220 else if(name=="rg32f")
222 else if(name=="rg16f")
224 else if(name=="r16f")
226 else if(name=="rgba16")
227 return FORMAT_RGBA16;
228 else if(name=="rg16")
236 else if(name=="rgba16_snorm")
237 return FORMAT_RGBA16_SNORM;
238 else if(name=="rg16_snorm")
239 return FORMAT_RG16_SNORM;
240 else if(name=="rg8_snorm")
241 return FORMAT_RG8_SNORM;
242 else if(name=="r16_snorm")
243 return FORMAT_RG16_SNORM;
244 else if(name=="r8_snorm")
245 return FORMAT_RG8_SNORM;
247 throw invalid_argument("SpirVGenerator::get_format");
250 void SpirVGenerator::use_capability(Capability cap)
252 if(used_capabilities.count(cap))
255 used_capabilities.insert(cap);
256 writer.write_op(content.capabilities, OP_CAPABILITY, cap);
259 SpirVGenerator::Id SpirVGenerator::import_extension(const string &name)
261 Id &ext_id = imported_extension_ids[name];
265 writer.begin_op(content.extensions, OP_EXT_INST_IMPORT);
266 writer.write(ext_id);
267 writer.write_string(name);
268 writer.end_op(OP_EXT_INST_IMPORT);
273 SpirVGenerator::Id SpirVGenerator::get_id(Node &node) const
275 return get_item(declared_ids, &node).id;
278 SpirVGenerator::Id SpirVGenerator::allocate_id(Node &node, Id type_id)
280 auto i = declared_ids.find(&node);
281 if(i!=declared_ids.end())
283 if(i->second.type_id)
284 throw key_error(&node);
285 i->second.type_id = type_id;
290 declared_ids.insert(make_pair(&node, Declaration(id, type_id)));
294 SpirVGenerator::Id SpirVGenerator::allocate_forward_id(Node &node)
296 auto i = declared_ids.find(&node);
297 if(i!=declared_ids.end())
301 declared_ids.insert(make_pair(&node, Declaration(id, 0)));
305 SpirVGenerator::Id SpirVGenerator::write_constant(Id type_id, Word value, bool spec)
307 Id const_id = next_id++;
308 if(is_scalar_type(type_id, BasicTypeDeclaration::BOOL))
310 Opcode opcode = (value ? (spec ? OP_SPEC_CONSTANT_TRUE : OP_CONSTANT_TRUE) :
311 (spec ? OP_SPEC_CONSTANT_FALSE : OP_CONSTANT_FALSE));
312 writer.write_op(content.globals, opcode, type_id, const_id);
316 Opcode opcode = (spec ? OP_SPEC_CONSTANT : OP_CONSTANT);
317 writer.write_op(content.globals, opcode, type_id, const_id, value);
322 SpirVGenerator::ConstantKey SpirVGenerator::get_constant_key(Id type_id, const Variant &value)
324 if(value.check_type<bool>())
325 return ConstantKey(type_id, value.value<bool>());
326 else if(value.check_type<int>())
327 return ConstantKey(type_id, value.value<int>());
328 else if(value.check_type<unsigned>())
329 return ConstantKey(type_id, value.value<unsigned>());
330 else if(value.check_type<float>())
331 return ConstantKey(type_id, value.value<float>());
333 throw invalid_argument("SpirVGenerator::get_constant_key");
336 SpirVGenerator::Id SpirVGenerator::get_constant_id(Id type_id, const Variant &value)
338 ConstantKey key = get_constant_key(type_id, value);
339 Id &const_id = constant_ids[key];
341 const_id = write_constant(type_id, key.int_value, false);
345 SpirVGenerator::Id SpirVGenerator::get_vector_constant_id(Id type_id, unsigned size, Id scalar_id)
347 Id &const_id = constant_ids[get_constant_key(type_id, static_cast<int>(scalar_id))];
350 const_id = next_id++;
351 writer.begin_op(content.globals, OP_CONSTANT_COMPOSITE, 3+size);
352 writer.write(type_id);
353 writer.write(const_id);
354 for(unsigned i=0; i<size; ++i)
355 writer.write(scalar_id);
356 writer.end_op(OP_CONSTANT_COMPOSITE);
361 SpirVGenerator::Id SpirVGenerator::get_standard_type_id(BasicTypeDeclaration::Kind kind, unsigned size, bool sign)
363 Id base_id = (size>1 ? get_standard_type_id(kind, 1, sign) : 0);
364 Id &type_id = standard_type_ids[base_id ? TypeKey(base_id, size) : TypeKey(kind, sign)];
369 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, base_id, size);
370 else if(kind==BasicTypeDeclaration::VOID)
371 writer.write_op(content.globals, OP_TYPE_VOID, type_id);
372 else if(kind==BasicTypeDeclaration::BOOL)
373 writer.write_op(content.globals, OP_TYPE_BOOL, type_id);
374 else if(kind==BasicTypeDeclaration::INT)
375 writer.write_op(content.globals, OP_TYPE_INT, type_id, 32, sign);
376 else if(kind==BasicTypeDeclaration::FLOAT)
377 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, 32);
379 throw invalid_argument("SpirVGenerator::get_standard_type_id");
384 bool SpirVGenerator::is_scalar_type(Id type_id, BasicTypeDeclaration::Kind kind) const
386 auto i = standard_type_ids.find(TypeKey(kind, true));
387 return (i!=standard_type_ids.end() && i->second==type_id);
390 SpirVGenerator::Id SpirVGenerator::get_array_type_id(TypeDeclaration &base_type, Id size_id, bool extended_align)
392 Id base_type_id = get_id(base_type);
393 Id &array_type_id = array_type_ids[TypeKey(base_type_id, extended_align*0x400000 | size_id)];
396 array_type_id = next_id++;
398 writer.write_op(content.globals, OP_TYPE_ARRAY, array_type_id, base_type_id, size_id);
400 writer.write_op(content.globals, OP_TYPE_RUNTIME_ARRAY, array_type_id, base_type_id);
402 unsigned stride = MemoryRequirementsCalculator().apply(base_type).stride;
404 stride = (stride+15)&~15U;
405 writer.write_op_decorate(array_type_id, DECO_ARRAY_STRIDE, stride);
408 return array_type_id;
411 SpirVGenerator::Id SpirVGenerator::get_pointer_type_id(Id type_id, StorageClass storage)
413 Id &ptr_type_id = pointer_type_ids[TypeKey(type_id, storage)];
416 ptr_type_id = next_id++;
417 writer.write_op(content.globals, OP_TYPE_POINTER, ptr_type_id, storage, type_id);
422 SpirVGenerator::Id SpirVGenerator::get_variable_type_id(const VariableDeclaration &var)
424 if(const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var.type_declaration))
425 if(basic->kind==BasicTypeDeclaration::ARRAY)
428 throw logic_error("array without size");
430 SetFlag set_const(constant_expression);
431 r_expression_result_id = 0;
432 var.array_size->visit(*this);
433 return get_array_type_id(*basic->base_type, r_expression_result_id, basic->extended_alignment);
436 return get_id(*var.type_declaration);
439 SpirVGenerator::Id SpirVGenerator::get_load_id(VariableDeclaration &var)
441 Id &load_result_id = variable_load_ids[&var];
444 load_result_id = next_id++;
445 writer.write_op(content.function_body, OP_LOAD, get_variable_type_id(var), load_result_id, get_id(var));
447 return load_result_id;
450 void SpirVGenerator::prune_loads(Id min_id)
452 for(auto i=variable_load_ids.begin(); i!=variable_load_ids.end(); )
454 if(i->second>=min_id)
455 variable_load_ids.erase(i++);
461 SpirVGenerator::Id SpirVGenerator::begin_expression(Opcode opcode, Id type_id, unsigned n_args)
463 bool has_result = (opcode==OP_FUNCTION_CALL || !is_scalar_type(type_id, BasicTypeDeclaration::VOID));
464 if(!constant_expression)
466 if(!current_function)
467 throw internal_error("non-constant expression outside a function");
469 writer.begin_op(content.function_body, opcode, (n_args ? 1+has_result*2+n_args : 0));
471 else if(opcode==OP_COMPOSITE_CONSTRUCT)
472 writer.begin_op(content.globals, (spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE),
473 (n_args ? 1+has_result*2+n_args : 0));
474 else if(!spec_constant)
475 throw internal_error("invalid non-specialization constant expression");
477 writer.begin_op(content.globals, OP_SPEC_CONSTANT_OP, (n_args ? 2+has_result*2+n_args : 0));
479 Id result_id = next_id++;
482 writer.write(type_id);
483 writer.write(result_id);
485 if(spec_constant && opcode!=OP_COMPOSITE_CONSTRUCT)
486 writer.write(opcode);
491 void SpirVGenerator::end_expression(Opcode opcode)
493 if(constant_expression)
494 opcode = (opcode==OP_COMPOSITE_CONSTRUCT ? spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE : OP_SPEC_CONSTANT_OP);
495 writer.end_op(opcode);
498 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id arg_id)
500 Id result_id = begin_expression(opcode, type_id, 1);
501 writer.write(arg_id);
502 end_expression(opcode);
506 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id left_id, Id right_id)
508 Id result_id = begin_expression(opcode, type_id, 2);
509 writer.write(left_id);
510 writer.write(right_id);
511 end_expression(opcode);
515 void SpirVGenerator::write_deconstruct(Id elem_type_id, Id composite_id, Id *elem_ids, unsigned n_elems)
517 for(unsigned i=0; i<n_elems; ++i)
519 elem_ids[i] = begin_expression(OP_COMPOSITE_EXTRACT, elem_type_id, 2);
520 writer.write(composite_id);
522 end_expression(OP_COMPOSITE_EXTRACT);
526 SpirVGenerator::Id SpirVGenerator::write_construct(Id type_id, const Id *elem_ids, unsigned n_elems)
528 Id result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, type_id, n_elems);
529 for(unsigned i=0; i<n_elems; ++i)
530 writer.write(elem_ids[i]);
531 end_expression(OP_COMPOSITE_CONSTRUCT);
536 void SpirVGenerator::visit(Block &block)
538 for(const RefPtr<Statement> &s: block.body)
542 void SpirVGenerator::visit(Literal &literal)
544 Id type_id = get_id(*literal.type);
546 r_expression_result_id = write_constant(type_id, get_constant_key(type_id, literal.value).int_value, true);
548 r_expression_result_id = get_constant_id(type_id, literal.value);
549 r_constant_result = true;
552 void SpirVGenerator::visit(VariableReference &var)
554 if(constant_expression || var.declaration->constant)
556 if(!var.declaration->constant)
557 throw internal_error("reference to non-constant variable in constant context");
559 r_expression_result_id = get_id(*var.declaration);
560 r_constant_result = true;
563 else if(!current_function)
564 throw internal_error("non-constant context outside a function");
566 r_constant_result = false;
569 r_expression_result_id = 0;
570 if(!assignment_source_id)
572 auto i = variable_load_ids.find(var.declaration);
573 if(i!=variable_load_ids.end())
574 r_expression_result_id = i->second;
576 if(!r_expression_result_id)
577 r_composite_base = var.declaration;
579 else if(assignment_source_id)
581 writer.write_op(content.function_body, OP_STORE, get_id(*var.declaration), assignment_source_id);
582 variable_load_ids[var.declaration] = assignment_source_id;
583 r_expression_result_id = assignment_source_id;
586 r_expression_result_id = get_load_id(*var.declaration);
589 void SpirVGenerator::generate_composite_access(TypeDeclaration &result_type)
592 Id result_type_id = get_id(result_type);
593 Id access_type_id = result_type_id;
596 if(constant_expression)
597 throw internal_error("composite access through pointer in constant context");
599 Id int32_type_id = get_standard_type_id(BasicTypeDeclaration::INT, 1);
600 for(unsigned &i: r_composite_chain)
601 i = (i<0x400000 ? get_constant_id(int32_type_id, static_cast<int>(i)) : i&0x3FFFFF);
603 /* Find the storage class of the base and obtain appropriate pointer type
605 const Declaration &base_decl = get_item(declared_ids, r_composite_base);
606 auto i = pointer_type_ids.begin();
607 for(; (i!=pointer_type_ids.end() && i->second!=base_decl.type_id); ++i) ;
608 if(i==pointer_type_ids.end())
609 throw internal_error("could not find storage class");
610 access_type_id = get_pointer_type_id(result_type_id, static_cast<StorageClass>(i->first.detail));
612 opcode = OP_ACCESS_CHAIN;
614 else if(assignment_source_id)
615 throw internal_error("assignment to temporary composite");
618 for(unsigned &i: r_composite_chain)
619 for(auto j=constant_ids.begin(); (i>=0x400000 && j!=constant_ids.end()); ++j)
620 if(j->second==(i&0x3FFFFF))
621 i = j->first.int_value;
623 opcode = OP_COMPOSITE_EXTRACT;
626 Id access_id = begin_expression(opcode, access_type_id, 1+r_composite_chain.size());
627 writer.write(r_composite_base_id);
628 for(unsigned i: r_composite_chain)
630 end_expression(opcode);
632 r_constant_result = false;
635 if(assignment_source_id)
637 writer.write_op(content.function_body, OP_STORE, access_id, assignment_source_id);
638 r_expression_result_id = assignment_source_id;
641 r_expression_result_id = write_expression(OP_LOAD, result_type_id, access_id);
644 r_expression_result_id = access_id;
647 void SpirVGenerator::visit_composite(Expression &base_expr, unsigned index, TypeDeclaration &type)
649 if(!composite_access)
651 r_composite_base = 0;
652 r_composite_base_id = 0;
653 r_composite_chain.clear();
657 SetFlag set_composite(composite_access);
658 base_expr.visit(*this);
661 if(!r_composite_base_id)
662 r_composite_base_id = (r_composite_base ? get_id(*r_composite_base) : r_expression_result_id);
664 r_composite_chain.push_back(index);
665 if(!composite_access)
666 generate_composite_access(type);
668 r_expression_result_id = 0;
671 void SpirVGenerator::visit_isolated(Expression &expr)
673 SetForScope<Id> clear_assign(assignment_source_id, 0);
674 SetFlag clear_composite(composite_access, false);
675 SetForScope<Node *> clear_base(r_composite_base, 0);
676 SetForScope<Id> clear_base_id(r_composite_base_id, 0);
677 vector<unsigned> saved_chain;
678 swap(saved_chain, r_composite_chain);
680 swap(saved_chain, r_composite_chain);
683 void SpirVGenerator::visit(MemberAccess &memacc)
685 visit_composite(*memacc.left, memacc.index, *memacc.type);
688 void SpirVGenerator::visit(Swizzle &swizzle)
691 visit_composite(*swizzle.left, swizzle.components[0], *swizzle.type);
692 else if(assignment_source_id)
694 const BasicTypeDeclaration &basic = dynamic_cast<const BasicTypeDeclaration &>(*swizzle.left->type);
697 for(unsigned i=0; i<swizzle.count; ++i)
698 mask |= 1<<swizzle.components[i];
700 visit_isolated(*swizzle.left);
702 Id combined_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.left->type), 2+basic.size);
703 writer.write(r_expression_result_id);
704 writer.write(assignment_source_id);
705 for(unsigned i=0; i<basic.size; ++i)
706 writer.write(i+((mask>>i)&1)*basic.size);
707 end_expression(OP_VECTOR_SHUFFLE);
709 SetForScope<Id> set_assign(assignment_source_id, combined_id);
710 swizzle.left->visit(*this);
712 r_expression_result_id = combined_id;
716 swizzle.left->visit(*this);
717 Id left_id = r_expression_result_id;
719 r_expression_result_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.type), 2+swizzle.count);
720 writer.write(left_id);
721 writer.write(left_id);
722 for(unsigned i=0; i<swizzle.count; ++i)
723 writer.write(swizzle.components[i]);
724 end_expression(OP_VECTOR_SHUFFLE);
726 r_constant_result = false;
729 void SpirVGenerator::visit(UnaryExpression &unary)
732 return visit_isolated(unary);
734 unary.expression->visit(*this);
736 char oper = unary.oper->token[0];
737 char oper2 = unary.oper->token[1];
738 if(oper=='+' && !oper2)
741 BasicTypeDeclaration &basic = dynamic_cast<BasicTypeDeclaration &>(*unary.expression->type);
742 BasicTypeDeclaration &elem = *get_element_type(basic);
744 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
745 /* SPIR-V allows constant operations on floating-point values only for
747 throw internal_error("invalid operands for constant unary expression");
749 Id result_type_id = get_id(*unary.type);
750 Opcode opcode = OP_NOP;
752 r_constant_result = false;
754 opcode = OP_LOGICAL_NOT;
757 else if(oper=='-' && !oper2)
759 opcode = (elem.kind==BasicTypeDeclaration::INT ? OP_S_NEGATE : OP_F_NEGATE);
761 if(basic.kind==BasicTypeDeclaration::MATRIX)
763 Id column_type_id = get_id(*basic.base_type);
764 unsigned n_columns = basic.size&0xFFFF;
766 write_deconstruct(column_type_id, r_expression_result_id, column_ids, n_columns);
767 for(unsigned i=0; i<n_columns; ++i)
768 column_ids[i] = write_expression(opcode, column_type_id, column_ids[i]);
769 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
773 else if((oper=='+' || oper=='-') && oper2==oper)
775 if(constant_expression)
776 throw internal_error("increment or decrement in constant expression");
779 if(elem.kind==BasicTypeDeclaration::INT)
781 opcode = (oper=='+' ? OP_I_ADD : OP_I_SUB);
782 one_id = get_constant_id(get_id(elem), 1);
784 else if(elem.kind==BasicTypeDeclaration::FLOAT)
786 opcode = (oper=='+' ? OP_F_ADD : OP_F_SUB);
787 one_id = get_constant_id(get_id(elem), 1.0f);
790 throw internal_error("invalid increment/decrement");
792 if(basic.kind==BasicTypeDeclaration::VECTOR)
793 one_id = get_vector_constant_id(result_type_id, basic.size, one_id);
795 Id post_value_id = write_expression(opcode, result_type_id, r_expression_result_id, one_id);
797 SetForScope<Id> set_assign(assignment_source_id, post_value_id);
798 unary.expression->visit(*this);
800 r_expression_result_id = (unary.oper->type==Operator::POSTFIX ? r_expression_result_id : post_value_id);
805 throw internal_error("unknown unary operator");
807 r_expression_result_id = write_expression(opcode, result_type_id, r_expression_result_id);
810 void SpirVGenerator::visit(BinaryExpression &binary)
812 char oper = binary.oper->token[0];
815 visit_isolated(*binary.right);
816 return visit_composite(*binary.left, 0x400000|r_expression_result_id, *binary.type);
818 else if(composite_access)
819 return visit_isolated(binary);
821 if(assignment_source_id)
822 throw internal_error("invalid binary expression in assignment target");
824 BasicTypeDeclaration &basic_left = dynamic_cast<BasicTypeDeclaration &>(*binary.left->type);
825 BasicTypeDeclaration &basic_right = dynamic_cast<BasicTypeDeclaration &>(*binary.right->type);
826 // Expression resolver ensures that element types are the same
827 BasicTypeDeclaration &elem = *get_element_type(basic_left);
829 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
830 /* SPIR-V allows constant operations on floating-point values only for
832 throw internal_error("invalid operands for constant binary expression");
834 binary.left->visit(*this);
835 Id left_id = r_expression_result_id;
836 binary.right->visit(*this);
837 Id right_id = r_expression_result_id;
839 Id result_type_id = get_id(*binary.type);
840 Opcode opcode = OP_NOP;
841 bool swap_operands = false;
843 r_constant_result = false;
845 char oper2 = binary.oper->token[1];
846 if((oper=='<' || oper=='>') && oper2!=oper)
848 if(basic_left.kind==BasicTypeDeclaration::INT)
851 opcode = (oper=='<' ? (oper2=='=' ? OP_S_LESS_THAN_EQUAL : OP_S_LESS_THAN) :
852 (oper2=='=' ? OP_S_GREATER_THAN_EQUAL : OP_S_GREATER_THAN));
854 opcode = (oper=='<' ? (oper2=='=' ? OP_U_LESS_THAN_EQUAL : OP_U_LESS_THAN) :
855 (oper2=='=' ? OP_U_GREATER_THAN_EQUAL : OP_U_GREATER_THAN));
857 else if(basic_left.kind==BasicTypeDeclaration::FLOAT)
858 opcode = (oper=='<' ? (oper2=='=' ? OP_F_ORD_LESS_THAN_EQUAL : OP_F_ORD_LESS_THAN) :
859 (oper2=='=' ? OP_F_ORD_GREATER_THAN_EQUAL : OP_F_ORD_GREATER_THAN));
861 else if((oper=='=' || oper=='!') && oper2=='=')
863 if(elem.kind==BasicTypeDeclaration::BOOL)
864 opcode = (oper=='=' ? OP_LOGICAL_EQUAL : OP_LOGICAL_NOT_EQUAL);
865 else if(elem.kind==BasicTypeDeclaration::INT)
866 opcode = (oper=='=' ? OP_I_EQUAL : OP_I_NOT_EQUAL);
867 else if(elem.kind==BasicTypeDeclaration::FLOAT)
868 opcode = (oper=='=' ? OP_F_ORD_EQUAL : OP_F_ORD_NOT_EQUAL);
870 if(opcode!=OP_NOP && basic_left.base_type)
872 /* The SPIR-V equality operations produce component-wise results, but
873 GLSL operators return a single boolean. Use the any/all operations to
874 combine the results. */
875 Opcode combine_op = (oper=='!' ? OP_ANY : OP_ALL);
876 unsigned n_elems = basic_left.size&0xFFFF;
877 Id bool_vec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, n_elems);
880 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
881 compare_id = write_expression(opcode, bool_vec_type_id, left_id, right_id);
882 else if(basic_left.kind==BasicTypeDeclaration::MATRIX)
884 Id column_type_id = get_id(*basic_left.base_type);
886 write_deconstruct(column_type_id, left_id, column_ids, n_elems);
887 write_deconstruct(column_type_id, right_id, column_ids+4, n_elems);
889 Id column_bvec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, basic_left.size>>16);
890 for(unsigned i=0; i<n_elems; ++i)
892 compare_id = write_expression(opcode, column_bvec_type_id, column_ids[i], column_ids[4+i]);
893 column_ids[i] = write_expression(combine_op, result_type_id, compare_id);;
896 compare_id = write_construct(bool_vec_type_id, column_ids, n_elems);
900 r_expression_result_id = write_expression(combine_op, result_type_id, compare_id);
904 else if(oper2=='&' && elem.kind==BasicTypeDeclaration::BOOL)
905 opcode = OP_LOGICAL_AND;
906 else if(oper2=='|' && elem.kind==BasicTypeDeclaration::BOOL)
907 opcode = OP_LOGICAL_OR;
908 else if(oper2=='^' && elem.kind==BasicTypeDeclaration::BOOL)
909 opcode = OP_LOGICAL_NOT_EQUAL;
910 else if(oper=='&' && elem.kind==BasicTypeDeclaration::INT)
911 opcode = OP_BITWISE_AND;
912 else if(oper=='|' && elem.kind==BasicTypeDeclaration::INT)
913 opcode = OP_BITWISE_OR;
914 else if(oper=='^' && elem.kind==BasicTypeDeclaration::INT)
915 opcode = OP_BITWISE_XOR;
916 else if(oper=='<' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
917 opcode = OP_SHIFT_LEFT_LOGICAL;
918 else if(oper=='>' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
919 opcode = OP_SHIFT_RIGHT_ARITHMETIC;
920 else if(oper=='%' && elem.kind==BasicTypeDeclaration::INT)
921 opcode = (elem.sign ? OP_S_MOD : OP_U_MOD);
922 else if(oper=='+' || oper=='-' || oper=='*' || oper=='/')
924 Opcode elem_op = OP_NOP;
925 if(elem.kind==BasicTypeDeclaration::INT)
928 elem_op = (elem.sign ? OP_S_DIV : OP_U_DIV);
930 elem_op = (oper=='+' ? OP_I_ADD : oper=='-' ? OP_I_SUB : OP_I_MUL);
932 else if(elem.kind==BasicTypeDeclaration::FLOAT)
933 elem_op = (oper=='+' ? OP_F_ADD : oper=='-' ? OP_F_SUB : oper=='*' ? OP_F_MUL : OP_F_DIV);
935 if(oper=='*' && (basic_left.base_type || basic_right.base_type) && elem.kind==BasicTypeDeclaration::FLOAT)
937 /* Multiplication between floating-point vectors and matrices has
938 dedicated operations. */
939 if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
940 opcode = OP_MATRIX_TIMES_MATRIX;
941 else if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
943 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
944 opcode = OP_VECTOR_TIMES_MATRIX;
945 else if(basic_right.kind==BasicTypeDeclaration::VECTOR)
946 opcode = OP_MATRIX_TIMES_VECTOR;
949 opcode = OP_MATRIX_TIMES_SCALAR;
950 swap_operands = (basic_right.kind==BasicTypeDeclaration::MATRIX);
953 else if(basic_left.kind==BasicTypeDeclaration::VECTOR && basic_right.kind==BasicTypeDeclaration::VECTOR)
957 opcode = OP_VECTOR_TIMES_SCALAR;
958 swap_operands = (basic_right.kind==BasicTypeDeclaration::VECTOR);
961 else if((basic_left.base_type!=0)!=(basic_right.base_type!=0))
963 /* One operand is scalar and the other is a vector or a matrix.
964 Expand the scalar to a vector of appropriate size. */
965 Id &scalar_id = (basic_left.base_type ? right_id : left_id);
966 BasicTypeDeclaration *vector_type = (basic_left.base_type ? &basic_left : &basic_right);
967 if(vector_type->kind==BasicTypeDeclaration::MATRIX)
968 vector_type = dynamic_cast<BasicTypeDeclaration *>(vector_type->base_type);
969 Id vector_type_id = get_id(*vector_type);
971 Id expanded_id = begin_expression(OP_COMPOSITE_CONSTRUCT, vector_type_id, vector_type->size);
972 for(unsigned i=0; i<vector_type->size; ++i)
973 writer.write(scalar_id);
974 end_expression(OP_COMPOSITE_CONSTRUCT);
976 scalar_id = expanded_id;
978 if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
980 // Apply matrix operation column-wise.
981 Id matrix_id = (basic_left.base_type ? left_id : right_id);
984 unsigned n_columns = (basic_left.base_type ? basic_left.size : basic_right.size)&0xFFFF;
985 write_deconstruct(vector_type_id, matrix_id, column_ids, n_columns);
987 for(unsigned i=0; i<n_columns; ++i)
988 column_ids[i] = write_expression(elem_op, vector_type_id, column_ids[i], expanded_id);
990 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
996 else if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
999 throw internal_error("non-float matrix multiplication");
1001 /* Other operations involving matrices need to be performed
1003 Id column_type_id = get_id(*basic_left.base_type);
1006 unsigned n_columns = basic_left.size&0xFFFF;
1007 write_deconstruct(column_type_id, left_id, column_ids, n_columns);
1008 write_deconstruct(column_type_id, right_id, column_ids+4, n_columns);
1010 for(unsigned i=0; i<n_columns; ++i)
1011 column_ids[i] = write_expression(elem_op, column_type_id, column_ids[i], column_ids[4+i]);
1013 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
1016 else if(basic_left.kind==basic_right.kind)
1017 // Both operands are either scalars or vectors.
1022 throw internal_error("unknown binary operator");
1025 swap(left_id, right_id);
1027 r_expression_result_id = write_expression(opcode, result_type_id, left_id, right_id);
1030 void SpirVGenerator::visit(Assignment &assign)
1032 if(assign.oper->token[0]!='=')
1033 visit(static_cast<BinaryExpression &>(assign));
1035 assign.right->visit(*this);
1037 SetForScope<Id> set_assign(assignment_source_id, r_expression_result_id);
1038 assign.left->visit(*this);
1039 r_constant_result = false;
1042 void SpirVGenerator::visit(TernaryExpression &ternary)
1044 if(composite_access)
1045 return visit_isolated(ternary);
1046 if(constant_expression)
1048 ternary.condition->visit(*this);
1049 Id condition_id = r_expression_result_id;
1050 ternary.true_expr->visit(*this);
1051 Id true_result_id = r_expression_result_id;
1052 ternary.false_expr->visit(*this);
1053 Id false_result_id = r_expression_result_id;
1055 r_expression_result_id = begin_expression(OP_SELECT, get_id(*ternary.type), 3);
1056 writer.write(condition_id);
1057 writer.write(true_result_id);
1058 writer.write(false_result_id);
1059 end_expression(OP_SELECT);
1064 ternary.condition->visit(*this);
1065 Id condition_id = r_expression_result_id;
1067 Id true_label_id = next_id++;
1068 Id false_label_id = next_id++;
1069 Id merge_block_id = next_id++;
1070 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1071 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, condition_id, true_label_id, false_label_id);
1073 std::map<const VariableDeclaration *, Id> saved_load_ids = variable_load_ids;
1075 writer.write_op_label(true_label_id);
1076 ternary.true_expr->visit(*this);
1077 Id true_result_id = r_expression_result_id;
1078 true_label_id = writer.get_current_block();
1079 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1081 swap(saved_load_ids, variable_load_ids);
1082 writer.write_op_label(false_label_id);
1083 ternary.false_expr->visit(*this);
1084 Id false_result_id = r_expression_result_id;
1085 false_label_id = writer.get_current_block();
1087 writer.write_op_label(merge_block_id);
1088 prune_loads(true_label_id);
1089 r_expression_result_id = begin_expression(OP_PHI, get_id(*ternary.type), 4);
1090 writer.write(true_result_id);
1091 writer.write(true_label_id);
1092 writer.write(false_result_id);
1093 writer.write(false_label_id);
1094 end_expression(OP_PHI);
1096 r_constant_result = false;
1099 void SpirVGenerator::visit(FunctionCall &call)
1101 if(assignment_source_id)
1102 throw internal_error("assignment to function call");
1103 else if(composite_access)
1104 return visit_isolated(call);
1105 else if(call.constructor && call.arguments.size()==1 && call.arguments[0]->type==call.type)
1106 return call.arguments[0]->visit(*this);
1108 vector<Id> argument_ids;
1109 argument_ids.reserve(call.arguments.size());
1110 bool all_args_const = true;
1111 for(const RefPtr<Expression> &a: call.arguments)
1114 argument_ids.push_back(r_expression_result_id);
1115 all_args_const &= r_constant_result;
1118 if(constant_expression && (!call.constructor || !all_args_const))
1119 throw internal_error("function call in constant expression");
1121 Id result_type_id = get_id(*call.type);
1122 r_constant_result = false;
1124 if(call.constructor)
1125 visit_constructor(call, argument_ids, all_args_const);
1126 else if(call.declaration->source==BUILTIN_SOURCE)
1129 for(const RefPtr<Expression> &a: call.arguments)
1130 if(BasicTypeDeclaration *basic_arg = dynamic_cast<BasicTypeDeclaration *>(a->type))
1132 BasicTypeDeclaration &elem_arg = *get_element_type(*basic_arg);
1133 switch(elem_arg.kind)
1135 case BasicTypeDeclaration::BOOL: arg_types += 'b'; break;
1136 case BasicTypeDeclaration::INT: arg_types += (elem_arg.sign ? 'i' : 'u'); break;
1137 case BasicTypeDeclaration::FLOAT: arg_types += 'f'; break;
1138 default: arg_types += '?';
1142 const BuiltinFunctionInfo *builtin_info;
1143 for(builtin_info=builtin_functions; builtin_info->function[0]; ++builtin_info)
1144 if(builtin_info->function==call.name && (!builtin_info->arg_types[0] || builtin_info->arg_types==arg_types))
1147 if(builtin_info->capability)
1148 use_capability(static_cast<Capability>(builtin_info->capability));
1150 if(builtin_info->opcode)
1153 if(builtin_info->extension[0])
1155 opcode = OP_EXT_INST;
1156 Id ext_id = import_extension(builtin_info->extension);
1158 r_expression_result_id = begin_expression(opcode, result_type_id);
1159 writer.write(ext_id);
1160 writer.write(builtin_info->opcode);
1164 opcode = static_cast<Opcode>(builtin_info->opcode);
1165 r_expression_result_id = begin_expression(opcode, result_type_id);
1168 for(unsigned i=0; i<call.arguments.size(); ++i)
1170 if(!builtin_info->arg_order[i] || builtin_info->arg_order[i]>argument_ids.size())
1171 throw internal_error("invalid builtin function info");
1172 writer.write(argument_ids[builtin_info->arg_order[i]-1]);
1175 end_expression(opcode);
1177 else if(builtin_info->handler)
1178 (this->*(builtin_info->handler))(call, argument_ids);
1180 throw internal_error("unknown builtin function "+call.name);
1184 r_expression_result_id = begin_expression(OP_FUNCTION_CALL, result_type_id, 1+call.arguments.size());
1185 writer.write(get_id(*call.declaration->definition));
1186 for(Id i: argument_ids)
1188 end_expression(OP_FUNCTION_CALL);
1190 // Any global variables the called function uses might have changed value
1191 set<Node *> dependencies = DependencyCollector().apply(*call.declaration->definition);
1192 for(Node *n: dependencies)
1193 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(n))
1194 variable_load_ids.erase(var);
1198 void SpirVGenerator::visit_constructor(FunctionCall &call, const vector<Id> &argument_ids, bool all_args_const)
1200 Id result_type_id = get_id(*call.type);
1202 BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(call.type);
1205 if(dynamic_cast<const StructDeclaration *>(call.type))
1206 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1208 throw internal_error("unconstructable type "+call.name);
1212 SetFlag set_const(constant_expression, constant_expression || all_args_const);
1214 BasicTypeDeclaration &elem = *get_element_type(*basic);
1215 BasicTypeDeclaration &basic_arg0 = dynamic_cast<BasicTypeDeclaration &>(*call.arguments[0]->type);
1216 BasicTypeDeclaration &elem_arg0 = *get_element_type(basic_arg0);
1218 if(basic->kind==BasicTypeDeclaration::MATRIX)
1220 Id col_type_id = get_id(*basic->base_type);
1221 unsigned n_columns = basic->size&0xFFFF;
1222 unsigned n_rows = basic->size>>16;
1225 if(call.arguments.size()==1)
1227 // Construct diagonal matrix from a single scalar.
1228 Id zero_id = get_constant_id(get_id(elem), 0.0f);
1229 for(unsigned i=0; i<n_columns; ++i)
1231 column_ids[i] = begin_expression(OP_COMPOSITE_CONSTRUCT, col_type_id, n_rows);
1232 for(unsigned j=0; j<n_rows; ++j)
1233 writer.write(j==i ? argument_ids[0] : zero_id);
1234 end_expression(OP_COMPOSITE_CONSTRUCT);
1238 // Construct a matrix from column vectors
1239 copy(argument_ids.begin(), argument_ids.begin()+n_columns, column_ids);
1241 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
1243 else if(basic->kind==BasicTypeDeclaration::VECTOR && (call.arguments.size()>1 || basic_arg0.kind!=BasicTypeDeclaration::VECTOR))
1245 /* There's either a single scalar argument or multiple arguments
1246 which make up the vector's components. */
1247 if(call.arguments.size()==1)
1249 r_expression_result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, result_type_id);
1250 for(unsigned i=0; i<basic->size; ++i)
1251 writer.write(argument_ids[0]);
1252 end_expression(OP_COMPOSITE_CONSTRUCT);
1255 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1257 else if(elem.kind==BasicTypeDeclaration::BOOL)
1259 if(constant_expression)
1260 throw internal_error("unconverted constant");
1262 // Conversion to boolean is implemented as comparing against zero.
1263 Id number_type_id = get_id(elem_arg0);
1264 Id zero_id = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ?
1265 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1266 if(basic_arg0.kind==BasicTypeDeclaration::VECTOR)
1267 zero_id = get_vector_constant_id(get_id(basic_arg0), basic_arg0.size, zero_id);
1269 Opcode opcode = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ? OP_F_ORD_NOT_EQUAL : OP_I_NOT_EQUAL);
1270 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0], zero_id);
1272 else if(elem_arg0.kind==BasicTypeDeclaration::BOOL)
1274 if(constant_expression)
1275 throw internal_error("unconverted constant");
1277 /* Conversion from boolean is implemented as selecting from zero
1279 Id number_type_id = get_id(elem);
1280 Id zero_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1281 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1282 Id one_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1283 get_constant_id(number_type_id, 1.0f) : get_constant_id(number_type_id, 1));
1284 if(basic->kind==BasicTypeDeclaration::VECTOR)
1286 zero_id = get_vector_constant_id(get_id(*basic), basic->size, zero_id);
1287 one_id = get_vector_constant_id(get_id(*basic), basic->size, one_id);
1290 r_expression_result_id = begin_expression(OP_SELECT, result_type_id, 3);
1291 writer.write(argument_ids[0]);
1292 writer.write(zero_id);
1293 writer.write(one_id);
1294 end_expression(OP_SELECT);
1298 if(constant_expression)
1299 throw internal_error("unconverted constant");
1301 // Scalar or vector conversion between types of equal size.
1303 if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::FLOAT)
1304 opcode = (elem.sign ? OP_CONVERT_F_TO_S : OP_CONVERT_F_TO_U);
1305 else if(elem.kind==BasicTypeDeclaration::FLOAT && elem_arg0.kind==BasicTypeDeclaration::INT)
1306 opcode = (elem_arg0.sign ? OP_CONVERT_S_TO_F : OP_CONVERT_U_TO_F);
1307 else if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::INT)
1308 opcode = OP_BITCAST;
1310 throw internal_error("invalid conversion");
1312 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0]);
1316 void SpirVGenerator::visit_builtin_matrix_comp_mult(FunctionCall &call, const vector<Id> &argument_ids)
1318 if(argument_ids.size()!=2)
1319 throw internal_error("invalid matrixCompMult call");
1321 const BasicTypeDeclaration &basic_arg0 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[0]->type);
1322 Id column_type_id = get_id(*basic_arg0.base_type);
1325 unsigned n_columns = basic_arg0.size&0xFFFF;
1326 write_deconstruct(column_type_id, argument_ids[0], column_ids, n_columns);
1327 write_deconstruct(column_type_id, argument_ids[1], column_ids+4, n_columns);
1329 for(unsigned i=0; i<n_columns; ++i)
1330 column_ids[i] = write_expression(OP_F_MUL, column_type_id, column_ids[i], column_ids[4+i]);
1332 r_expression_result_id = write_construct(get_id(*call.type), column_ids, n_columns);
1335 void SpirVGenerator::visit_builtin_texture_query(FunctionCall &call, const vector<Id> &argument_ids)
1337 if(argument_ids.size()<1)
1338 throw internal_error("invalid texture query call");
1341 if(call.name=="textureSize")
1342 opcode = OP_IMAGE_QUERY_SIZE_LOD;
1343 else if(call.name=="imageSize")
1344 opcode = OP_IMAGE_QUERY_SIZE;
1345 else if(call.name=="textureQueryLod")
1346 opcode = OP_IMAGE_QUERY_LOD;
1347 else if(call.name=="textureQueryLevels")
1348 opcode = OP_IMAGE_QUERY_LEVELS;
1349 else if(call.name=="textureSamples" || call.name=="imageSamples")
1350 opcode = OP_IMAGE_QUERY_SAMPLES;
1352 throw internal_error("invalid texture query call");
1354 ImageTypeDeclaration &image_arg0 = dynamic_cast<ImageTypeDeclaration &>(*call.arguments[0]->type);
1357 if(image_arg0.sampled && opcode!=OP_IMAGE_QUERY_LOD)
1359 Id image_type_id = get_item(image_type_ids, get_id(image_arg0));
1360 image_id = write_expression(OP_IMAGE, image_type_id, argument_ids[0]);
1363 image_id = argument_ids[0];
1365 Id result_type_id = get_id(*call.type);
1366 r_expression_result_id = begin_expression(opcode, result_type_id, argument_ids.size());
1367 writer.write(image_id);
1368 for(unsigned i=1; i<argument_ids.size(); ++i)
1369 writer.write(argument_ids[i]);
1370 end_expression(opcode);
1373 void SpirVGenerator::visit_builtin_texture(FunctionCall &call, const vector<Id> &argument_ids)
1375 if(argument_ids.size()<2)
1376 throw internal_error("invalid texture sampling call");
1378 bool explicit_lod = (stage->type!=Stage::FRAGMENT || call.name=="textureLod");
1379 Id lod_id = (!explicit_lod ? 0 : call.name=="textureLod" ? argument_ids.back() :
1380 get_constant_id(get_standard_type_id(BasicTypeDeclaration::FLOAT, 1), 0.0f));
1382 const ImageTypeDeclaration &image = dynamic_cast<const ImageTypeDeclaration &>(*call.arguments[0]->type);
1385 Id result_type_id = get_id(*call.type);
1389 if(argument_ids.size()==2)
1391 const BasicTypeDeclaration &basic_arg1 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[1]->type);
1392 dref_id = begin_expression(OP_COMPOSITE_EXTRACT, get_id(*basic_arg1.base_type), 2);
1393 writer.write(argument_ids.back());
1394 writer.write(basic_arg1.size-1);
1395 end_expression(OP_COMPOSITE_EXTRACT);
1398 dref_id = argument_ids[2];
1400 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_DREF_EXPLICIT_LOD : OP_IMAGE_SAMPLE_DREF_IMPLICIT_LOD);
1401 r_expression_result_id = begin_expression(opcode, result_type_id, 3+explicit_lod*2);
1405 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_EXPLICIT_LOD : OP_IMAGE_SAMPLE_IMPLICIT_LOD);
1406 r_expression_result_id = begin_expression(opcode, result_type_id, 2+explicit_lod*2);
1409 for(unsigned i=0; i<2; ++i)
1410 writer.write(argument_ids[i]);
1412 writer.write(dref_id);
1415 writer.write(2); // Lod
1416 writer.write(lod_id);
1419 end_expression(opcode);
1422 void SpirVGenerator::visit_builtin_texture_fetch(FunctionCall &call, const vector<Id> &argument_ids)
1424 const ImageTypeDeclaration &image = dynamic_cast<const ImageTypeDeclaration &>(*call.arguments[0]->type);
1427 if(call.name=="texelFetch")
1428 opcode = OP_IMAGE_FETCH;
1429 else if(call.name=="imageLoad")
1430 opcode = OP_IMAGE_READ;
1432 throw internal_error("invalid texture fetch call");
1434 bool need_sample = image.multisample;
1435 bool need_lod = (opcode==OP_IMAGE_FETCH && !need_sample);
1437 if(argument_ids.size()!=2U+need_sample+need_lod)
1438 throw internal_error("invalid texture fetch call");
1440 r_expression_result_id = begin_expression(opcode, get_id(*call.type), 2+(need_lod|need_sample)+need_lod+need_sample);
1441 for(unsigned i=0; i<2; ++i)
1442 writer.write(argument_ids[i]);
1443 if(need_lod || need_sample)
1445 writer.write(need_lod*0x02 | need_sample*0x40);
1446 writer.write(argument_ids.back());
1448 end_expression(opcode);
1451 void SpirVGenerator::visit_builtin_texture_store(FunctionCall &call, const vector<Id> &argument_ids)
1453 if(argument_ids.size()!=3)
1454 throw internal_error("invalid texture store call");
1456 const ImageTypeDeclaration &image = dynamic_cast<const ImageTypeDeclaration &>(*call.arguments[0]->type);
1458 begin_expression(OP_IMAGE_WRITE, get_id(*call.type), 3+image.multisample*2);
1459 for(unsigned i=0; i<2; ++i)
1460 writer.write(argument_ids[i]);
1461 writer.write(argument_ids.back());
1462 if(image.multisample)
1464 writer.write(0x40); // Sample
1465 writer.write(argument_ids[2]);
1467 end_expression(OP_IMAGE_WRITE);
1469 r_expression_result_id = 0;
1472 void SpirVGenerator::visit_builtin_interpolate(FunctionCall &call, const vector<Id> &argument_ids)
1474 if(argument_ids.size()<1)
1475 throw internal_error("invalid interpolate call");
1476 const VariableReference *var = dynamic_cast<const VariableReference *>(call.arguments[0].get());
1477 if(!var || !var->declaration || var->declaration->interface!="in")
1478 throw internal_error("invalid interpolate call");
1480 SpirVGlslStd450Opcode opcode;
1481 if(call.name=="interpolateAtCentroid")
1482 opcode = GLSL450_INTERPOLATE_AT_CENTROID;
1483 else if(call.name=="interpolateAtSample")
1484 opcode = GLSL450_INTERPOLATE_AT_SAMPLE;
1485 else if(call.name=="interpolateAtOffset")
1486 opcode = GLSL450_INTERPOLATE_AT_OFFSET;
1488 throw internal_error("invalid interpolate call");
1490 Id ext_id = import_extension("GLSL.std.450");
1491 r_expression_result_id = begin_expression(OP_EXT_INST, get_id(*call.type));
1492 writer.write(ext_id);
1493 writer.write(opcode);
1494 writer.write(get_id(*var->declaration));
1495 for(auto i=argument_ids.begin(); ++i!=argument_ids.end(); )
1497 end_expression(OP_EXT_INST);
1500 void SpirVGenerator::visit(ExpressionStatement &expr)
1502 expr.expression->visit(*this);
1505 void SpirVGenerator::visit(InterfaceLayout &layout)
1507 interface_layouts.push_back(&layout);
1510 bool SpirVGenerator::check_duplicate_type(TypeDeclaration &type)
1512 for(const auto &kvp: declared_ids)
1513 if(TypeDeclaration *type2 = dynamic_cast<TypeDeclaration *>(kvp.first))
1514 if(TypeComparer().apply(type, *type2))
1516 insert_unique(declared_ids, &type, kvp.second);
1523 bool SpirVGenerator::check_standard_type(BasicTypeDeclaration &basic)
1525 const BasicTypeDeclaration *elem = (basic.kind==BasicTypeDeclaration::VECTOR ?
1526 dynamic_cast<const BasicTypeDeclaration *>(basic.base_type) : &basic);
1527 if(!elem || elem->base_type)
1529 if((elem->kind==BasicTypeDeclaration::INT || elem->kind==BasicTypeDeclaration::FLOAT) && elem->size!=32)
1532 Id standard_id = get_standard_type_id(elem->kind, (basic.kind==BasicTypeDeclaration::VECTOR ? basic.size : 1), elem->sign);
1533 insert_unique(declared_ids, &basic, Declaration(standard_id, 0));
1534 writer.write_op_name(standard_id, basic.name);
1539 void SpirVGenerator::visit(BasicTypeDeclaration &basic)
1541 if(check_standard_type(basic))
1543 if(check_duplicate_type(basic))
1545 // Alias types shouldn't exist at this point and arrays are handled elsewhere
1546 if(basic.kind==BasicTypeDeclaration::ALIAS || basic.kind==BasicTypeDeclaration::ARRAY)
1549 Id type_id = allocate_id(basic, 0);
1550 writer.write_op_name(type_id, basic.name);
1554 case BasicTypeDeclaration::INT:
1555 writer.write_op(content.globals, OP_TYPE_INT, type_id, basic.size, basic.sign);
1557 case BasicTypeDeclaration::FLOAT:
1558 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, basic.size);
1560 case BasicTypeDeclaration::VECTOR:
1561 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, get_id(*basic.base_type), basic.size);
1563 case BasicTypeDeclaration::MATRIX:
1564 writer.write_op(content.globals, OP_TYPE_MATRIX, type_id, get_id(*basic.base_type), basic.size&0xFFFF);
1567 throw internal_error("unknown basic type");
1571 void SpirVGenerator::visit(ImageTypeDeclaration &image)
1573 if(check_duplicate_type(image))
1576 Id type_id = allocate_id(image, 0);
1578 Id image_id = (image.sampled ? next_id++ : type_id);
1579 writer.begin_op(content.globals, OP_TYPE_IMAGE, 9);
1580 writer.write(image_id);
1581 writer.write(get_id(*image.base_type));
1582 writer.write(image.dimensions-1);
1583 writer.write(image.shadow);
1584 writer.write(image.array);
1585 writer.write(image.multisample);
1586 writer.write(image.sampled ? 1 : 2);
1587 writer.write(get_format(image.format));
1588 writer.end_op(OP_TYPE_IMAGE);
1592 writer.write_op_name(type_id, image.name);
1593 writer.write_op(content.globals, OP_TYPE_SAMPLED_IMAGE, type_id, image_id);
1594 insert_unique(image_type_ids, type_id, image_id);
1597 if(image.dimensions==ImageTypeDeclaration::ONE)
1598 use_capability(image.sampled ? CAP_SAMPLED_1D : CAP_IMAGE_1D);
1599 else if(image.dimensions==ImageTypeDeclaration::CUBE && image.array)
1600 use_capability(image.sampled ? CAP_SAMPLED_CUBE_ARRAY : CAP_IMAGE_CUBE_ARRAY);
1602 if(image.multisample && !image.sampled)
1603 use_capability(CAP_STORAGE_IMAGE_MULTISAMPLE);
1606 void SpirVGenerator::visit(StructDeclaration &strct)
1608 if(check_duplicate_type(strct))
1611 Id type_id = allocate_id(strct, 0);
1612 writer.write_op_name(type_id, (strct.block_name.empty() ? strct.name : strct.block_name));
1614 if(!strct.block_name.empty())
1615 writer.write_op_decorate(type_id, DECO_BLOCK);
1617 bool builtin = !strct.block_name.compare(0, 3, "gl_");
1618 vector<Id> member_type_ids;
1619 member_type_ids.reserve(strct.members.body.size());
1620 for(const RefPtr<Statement> &s: strct.members.body)
1622 const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(s.get());
1626 unsigned index = member_type_ids.size();
1627 member_type_ids.push_back(get_variable_type_id(*var));
1629 writer.write_op_member_name(type_id, index, var->name);
1633 BuiltinSemantic semantic = get_builtin_semantic(var->name);
1634 writer.write_op_member_decorate(type_id, index, DECO_BUILTIN, semantic);
1640 for(const Layout::Qualifier &q: var->layout->qualifiers)
1642 if(q.name=="offset")
1643 writer.write_op_member_decorate(type_id, index, DECO_OFFSET, q.value);
1644 else if(q.name=="column_major")
1645 writer.write_op_member_decorate(type_id, index, DECO_COL_MAJOR);
1646 else if(q.name=="row_major")
1647 writer.write_op_member_decorate(type_id, index, DECO_ROW_MAJOR);
1651 const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var->type_declaration);
1652 while(basic && basic->kind==BasicTypeDeclaration::ARRAY)
1653 basic = dynamic_cast<const BasicTypeDeclaration *>(basic->base_type);
1654 if(basic && basic->kind==BasicTypeDeclaration::MATRIX)
1656 unsigned stride = MemoryRequirementsCalculator().apply(*basic->base_type).stride;
1657 writer.write_op_member_decorate(type_id, index, DECO_MATRIX_STRIDE, stride);
1662 writer.begin_op(content.globals, OP_TYPE_STRUCT);
1663 writer.write(type_id);
1664 for(Id i: member_type_ids)
1666 writer.end_op(OP_TYPE_STRUCT);
1669 void SpirVGenerator::visit(VariableDeclaration &var)
1671 Id type_id = get_variable_type_id(var);
1676 if(!var.init_expression)
1677 throw internal_error("const variable without initializer");
1679 int spec_id = get_layout_value(var.layout.get(), "constant_id");
1680 Id *spec_var_id = (spec_id>=0 ? &declared_spec_ids[spec_id] : 0);
1681 if(spec_id>=0 && *spec_var_id)
1683 insert_unique(declared_ids, &var, Declaration(*spec_var_id, type_id));
1687 SetFlag set_const(constant_expression);
1688 SetFlag set_spec(spec_constant, spec_id>=0);
1689 r_expression_result_id = 0;
1690 var.init_expression->visit(*this);
1691 var_id = r_expression_result_id;
1692 insert_unique(declared_ids, &var, Declaration(var_id, type_id));
1695 writer.write_op_decorate(var_id, DECO_SPEC_ID, spec_id);
1696 *spec_var_id = var_id;
1701 bool push_const = has_layout_qualifier(var.layout.get(), "push_constant");
1703 StorageClass storage;
1704 if(current_function)
1705 storage = STORAGE_FUNCTION;
1707 storage = STORAGE_PUSH_CONSTANT;
1709 storage = get_interface_storage(var.interface, var.block_declaration);
1711 Id ptr_type_id = get_pointer_type_id(type_id, storage);
1712 if(var.interface=="uniform")
1714 Id &uni_id = declared_uniform_ids[var.block_declaration ? "b"+var.block_declaration->block_name : "v"+var.name];
1717 insert_unique(declared_ids, &var, Declaration(uni_id, ptr_type_id));
1721 uni_id = var_id = allocate_id(var, ptr_type_id);
1724 var_id = allocate_id(var, (var.constant ? type_id : ptr_type_id));
1727 if(var.init_expression)
1729 SetFlag set_const(constant_expression, !current_function);
1730 r_expression_result_id = 0;
1731 r_constant_result = false;
1732 var.init_expression->visit(*this);
1733 init_id = r_expression_result_id;
1736 vector<Word> &target = (current_function ? content.locals : content.globals);
1737 writer.begin_op(target, OP_VARIABLE, 4+(init_id && !current_function));
1738 writer.write(ptr_type_id);
1739 writer.write(var_id);
1740 writer.write(storage);
1741 if(init_id && !current_function)
1742 writer.write(init_id);
1743 writer.end_op(OP_VARIABLE);
1747 for(const Layout::Qualifier &q: var.layout->qualifiers)
1749 if(q.name=="location")
1750 writer.write_op_decorate(var_id, DECO_LOCATION, q.value);
1751 else if(q.name=="set")
1752 writer.write_op_decorate(var_id, DECO_DESCRIPTOR_SET, q.value);
1753 else if(q.name=="binding")
1754 writer.write_op_decorate(var_id, DECO_BINDING, q.value);
1757 if(!var.block_declaration && !var.name.compare(0, 3, "gl_"))
1759 BuiltinSemantic semantic = get_builtin_semantic(var.name);
1760 writer.write_op_decorate(var_id, DECO_BUILTIN, semantic);
1763 if(init_id && current_function)
1765 writer.write_op(content.function_body, OP_STORE, var_id, init_id);
1766 variable_load_ids[&var] = init_id;
1770 if(var.name.find(' ')==string::npos)
1771 writer.write_op_name(var_id, var.name);
1774 void SpirVGenerator::visit_entry_point(FunctionDeclaration &func, Id func_id)
1776 writer.begin_op(content.entry_points, OP_ENTRY_POINT);
1779 case Stage::VERTEX: writer.write(0); break;
1780 case Stage::GEOMETRY: writer.write(3); break;
1781 case Stage::FRAGMENT: writer.write(4); break;
1782 default: throw internal_error("unknown stage");
1784 writer.write(func_id);
1785 writer.write_string(func.name);
1787 set<Node *> dependencies = DependencyCollector().apply(func);
1788 for(Node *n: dependencies)
1789 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(n))
1790 if(!var->interface.empty())
1791 writer.write(get_id(*n));
1793 writer.end_op(OP_ENTRY_POINT);
1795 if(stage->type==Stage::FRAGMENT)
1797 SpirVExecutionMode origin = (features.target_api==VULKAN ? EXEC_ORIGIN_UPPER_LEFT : EXEC_ORIGIN_LOWER_LEFT);
1798 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, origin);
1800 else if(stage->type==Stage::GEOMETRY)
1802 use_capability(CAP_GEOMETRY);
1803 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INVOCATIONS, 1);
1806 for(const InterfaceLayout *i: interface_layouts)
1808 for(const Layout::Qualifier &q: i->layout.qualifiers)
1811 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id,
1812 (i->interface=="in" ? EXEC_INPUT_POINTS : EXEC_OUTPUT_POINTS));
1813 else if(q.name=="lines")
1814 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES);
1815 else if(q.name=="lines_adjacency")
1816 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES_ADJACENCY);
1817 else if(q.name=="triangles")
1818 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_TRIANGLES);
1819 else if(q.name=="triangles_adjacency")
1820 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_TRIANGLES_ADJACENCY);
1821 else if(q.name=="line_strip")
1822 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_LINE_STRIP);
1823 else if(q.name=="triangle_strip")
1824 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_TRIANGLE_STRIP);
1825 else if(q.name=="max_vertices")
1826 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_VERTICES, q.value);
1831 void SpirVGenerator::visit(FunctionDeclaration &func)
1833 if(func.source==BUILTIN_SOURCE)
1835 else if(func.definition!=&func)
1838 allocate_forward_id(*func.definition);
1842 Id return_type_id = get_id(*func.return_type_declaration);
1843 vector<unsigned> param_type_ids;
1844 param_type_ids.reserve(func.parameters.size());
1845 for(const RefPtr<VariableDeclaration> &p: func.parameters)
1846 param_type_ids.push_back(get_variable_type_id(*p));
1848 string sig_with_return = func.return_type+func.signature;
1849 Id &type_id = function_type_ids[sig_with_return];
1852 type_id = next_id++;
1853 writer.begin_op(content.globals, OP_TYPE_FUNCTION);
1854 writer.write(type_id);
1855 writer.write(return_type_id);
1856 for(unsigned i: param_type_ids)
1858 writer.end_op(OP_TYPE_FUNCTION);
1860 writer.write_op_name(type_id, sig_with_return);
1863 Id func_id = allocate_id(func, type_id);
1864 writer.write_op_name(func_id, func.name+func.signature);
1866 if(func.name=="main")
1867 visit_entry_point(func, func_id);
1869 writer.begin_op(content.functions, OP_FUNCTION, 5);
1870 writer.write(return_type_id);
1871 writer.write(func_id);
1872 writer.write(0); // Function control flags (none)
1873 writer.write(type_id);
1874 writer.end_op(OP_FUNCTION);
1876 for(unsigned i=0; i<func.parameters.size(); ++i)
1878 Id param_id = allocate_id(*func.parameters[i], param_type_ids[i]);
1879 writer.write_op(content.functions, OP_FUNCTION_PARAMETER, param_type_ids[i], param_id);
1880 writer.write_op_name(param_id, func.parameters[i]->name);
1881 // TODO This is probably incorrect if the parameter is assigned to.
1882 variable_load_ids[func.parameters[i].get()] = param_id;
1886 writer.begin_function_body(next_id++);
1887 SetForScope<FunctionDeclaration *> set_func(current_function, &func);
1888 func.body.visit(*this);
1890 if(writer.get_current_block())
1893 writer.write_op(content.function_body, OP_UNREACHABLE);
1896 const BasicTypeDeclaration *basic_return = dynamic_cast<const BasicTypeDeclaration *>(func.return_type_declaration);
1897 if(basic_return && basic_return->kind==BasicTypeDeclaration::VOID)
1898 writer.write_op(content.function_body, OP_RETURN);
1900 throw internal_error("missing return in non-void function");
1903 writer.end_function_body();
1904 variable_load_ids.clear();
1907 void SpirVGenerator::visit(Conditional &cond)
1909 cond.condition->visit(*this);
1911 Id true_label_id = next_id++;
1912 Id merge_block_id = next_id++;
1913 Id false_label_id = (cond.else_body.body.empty() ? merge_block_id : next_id++);
1914 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1915 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, true_label_id, false_label_id);
1917 std::map<const VariableDeclaration *, Id> saved_load_ids = variable_load_ids;
1919 writer.write_op_label(true_label_id);
1920 cond.body.visit(*this);
1921 if(writer.get_current_block())
1922 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1924 bool reachable_if_true = reachable;
1927 if(!cond.else_body.body.empty())
1929 swap(saved_load_ids, variable_load_ids);
1930 writer.write_op_label(false_label_id);
1931 cond.else_body.visit(*this);
1932 reachable |= reachable_if_true;
1935 writer.write_op_label(merge_block_id);
1936 prune_loads(true_label_id);
1939 void SpirVGenerator::visit(Iteration &iter)
1941 if(iter.init_statement)
1942 iter.init_statement->visit(*this);
1944 for(Node *n: AssignmentCollector().apply(iter))
1945 if(VariableDeclaration *var = dynamic_cast<VariableDeclaration *>(n))
1946 variable_load_ids.erase(var);
1948 Id header_id = next_id++;
1949 Id continue_id = next_id++;
1950 Id merge_block_id = next_id++;
1952 SetForScope<Id> set_merge(loop_merge_block_id, merge_block_id);
1953 SetForScope<Id> set_continue(loop_continue_target_id, continue_id);
1955 writer.write_op_label(header_id);
1956 writer.write_op(content.function_body, OP_LOOP_MERGE, merge_block_id, continue_id, 0); // Loop control (none)
1958 Id body_id = next_id++;
1961 writer.write_op_label(next_id++);
1962 iter.condition->visit(*this);
1963 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, body_id, merge_block_id);
1966 writer.write_op_label(body_id);
1967 iter.body.visit(*this);
1969 writer.write_op_label(continue_id);
1970 if(iter.loop_expression)
1971 iter.loop_expression->visit(*this);
1972 writer.write_op(content.function_body, OP_BRANCH, header_id);
1974 writer.write_op_label(merge_block_id);
1975 prune_loads(header_id);
1979 void SpirVGenerator::visit(Return &ret)
1983 ret.expression->visit(*this);
1984 writer.write_op(content.function_body, OP_RETURN_VALUE, r_expression_result_id);
1987 writer.write_op(content.function_body, OP_RETURN);
1991 void SpirVGenerator::visit(Jump &jump)
1993 if(jump.keyword=="discard")
1994 writer.write_op(content.function_body, OP_KILL);
1995 else if(jump.keyword=="break")
1996 writer.write_op(content.function_body, OP_BRANCH, loop_merge_block_id);
1997 else if(jump.keyword=="continue")
1998 writer.write_op(content.function_body, OP_BRANCH, loop_continue_target_id);
2000 throw internal_error("unknown jump");
2005 SpirVGenerator::TypeKey::TypeKey(BasicTypeDeclaration::Kind kind, bool sign):
2010 case BasicTypeDeclaration::VOID: detail = 'v'; break;
2011 case BasicTypeDeclaration::BOOL: detail = 'b'; break;
2012 case BasicTypeDeclaration::INT: detail = (sign ? 'i' : 'u'); break;
2013 case BasicTypeDeclaration::FLOAT: detail = 'f'; break;
2014 default: throw invalid_argument("TypeKey::TypeKey");
2018 bool SpirVGenerator::TypeKey::operator<(const TypeKey &other) const
2020 if(type_id!=other.type_id)
2021 return type_id<other.type_id;
2022 return detail<other.detail;
2026 bool SpirVGenerator::ConstantKey::operator<(const ConstantKey &other) const
2028 if(type_id!=other.type_id)
2029 return type_id<other.type_id;
2030 return int_value<other.int_value;