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;
202 else if(name=="gl_NumWorkGroups")
203 return BUILTIN_NUM_WORKGROUPS;
204 else if(name=="gl_WorkGroupSize")
205 return BUILTIN_WORKGROUP_SIZE;
206 else if(name=="gl_WorkGroupID")
207 return BUILTIN_WORKGROUP_ID;
208 else if(name=="gl_LocalInvocationID")
209 return BUILTIN_LOCAL_INVOCATION_ID;
210 else if(name=="gl_GlobalInvocationID")
211 return BUILTIN_GLOBAL_INVOCATION_ID;
212 else if(name=="gl_LocalInvocationIndex")
213 return BUILTIN_LOCAL_INVOCATION_INDEX;
215 throw invalid_argument("SpirVGenerator::get_builtin_semantic");
218 SpirVFormat SpirVGenerator::get_format(const std::string &name)
221 return FORMAT_UNKNOWN;
222 else if(name=="rgba32f")
223 return FORMAT_RGBA32F;
224 else if(name=="rgba16f")
225 return FORMAT_RGBA16F;
226 else if(name=="r32f")
228 else if(name=="rgba8")
230 else if(name=="rgba8_snorm")
231 return FORMAT_RGBA8_SNORM;
232 else if(name=="rg32f")
234 else if(name=="rg16f")
236 else if(name=="r16f")
238 else if(name=="rgba16")
239 return FORMAT_RGBA16;
240 else if(name=="rg16")
248 else if(name=="rgba16_snorm")
249 return FORMAT_RGBA16_SNORM;
250 else if(name=="rg16_snorm")
251 return FORMAT_RG16_SNORM;
252 else if(name=="rg8_snorm")
253 return FORMAT_RG8_SNORM;
254 else if(name=="r16_snorm")
255 return FORMAT_RG16_SNORM;
256 else if(name=="r8_snorm")
257 return FORMAT_RG8_SNORM;
259 throw invalid_argument("SpirVGenerator::get_format");
262 void SpirVGenerator::use_capability(Capability cap)
264 if(used_capabilities.count(cap))
267 used_capabilities.insert(cap);
268 writer.write_op(content.capabilities, OP_CAPABILITY, cap);
271 SpirVGenerator::Id SpirVGenerator::import_extension(const string &name)
273 Id &ext_id = imported_extension_ids[name];
277 writer.begin_op(content.extensions, OP_EXT_INST_IMPORT);
278 writer.write(ext_id);
279 writer.write_string(name);
280 writer.end_op(OP_EXT_INST_IMPORT);
285 SpirVGenerator::Id SpirVGenerator::get_id(Node &node) const
287 return get_item(declared_ids, &node).id;
290 SpirVGenerator::Id SpirVGenerator::allocate_id(Node &node, Id type_id)
292 auto i = declared_ids.find(&node);
293 if(i!=declared_ids.end())
295 if(i->second.type_id)
296 throw key_error(&node);
297 i->second.type_id = type_id;
302 declared_ids.insert(make_pair(&node, Declaration(id, type_id)));
306 SpirVGenerator::Id SpirVGenerator::allocate_forward_id(Node &node)
308 auto i = declared_ids.find(&node);
309 if(i!=declared_ids.end())
313 declared_ids.insert(make_pair(&node, Declaration(id, 0)));
317 SpirVGenerator::Id SpirVGenerator::write_constant(Id type_id, Word value, bool spec)
319 Id const_id = next_id++;
320 if(is_scalar_type(type_id, BasicTypeDeclaration::BOOL))
322 Opcode opcode = (value ? (spec ? OP_SPEC_CONSTANT_TRUE : OP_CONSTANT_TRUE) :
323 (spec ? OP_SPEC_CONSTANT_FALSE : OP_CONSTANT_FALSE));
324 writer.write_op(content.globals, opcode, type_id, const_id);
328 Opcode opcode = (spec ? OP_SPEC_CONSTANT : OP_CONSTANT);
329 writer.write_op(content.globals, opcode, type_id, const_id, value);
334 SpirVGenerator::ConstantKey SpirVGenerator::get_constant_key(Id type_id, const Variant &value)
336 if(value.check_type<bool>())
337 return ConstantKey(type_id, value.value<bool>());
338 else if(value.check_type<int>())
339 return ConstantKey(type_id, value.value<int>());
340 else if(value.check_type<unsigned>())
341 return ConstantKey(type_id, value.value<unsigned>());
342 else if(value.check_type<float>())
343 return ConstantKey(type_id, value.value<float>());
345 throw invalid_argument("SpirVGenerator::get_constant_key");
348 SpirVGenerator::Id SpirVGenerator::get_constant_id(Id type_id, const Variant &value)
350 ConstantKey key = get_constant_key(type_id, value);
351 Id &const_id = constant_ids[key];
353 const_id = write_constant(type_id, key.int_value, false);
357 SpirVGenerator::Id SpirVGenerator::get_vector_constant_id(Id type_id, unsigned size, Id scalar_id)
359 Id &const_id = constant_ids[get_constant_key(type_id, static_cast<int>(scalar_id))];
362 const_id = next_id++;
363 writer.begin_op(content.globals, OP_CONSTANT_COMPOSITE, 3+size);
364 writer.write(type_id);
365 writer.write(const_id);
366 for(unsigned i=0; i<size; ++i)
367 writer.write(scalar_id);
368 writer.end_op(OP_CONSTANT_COMPOSITE);
373 SpirVGenerator::Id SpirVGenerator::get_standard_type_id(BasicTypeDeclaration::Kind kind, unsigned size, bool sign)
375 Id base_id = (size>1 ? get_standard_type_id(kind, 1, sign) : 0);
376 Id &type_id = standard_type_ids[base_id ? TypeKey(base_id, size) : TypeKey(kind, sign)];
381 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, base_id, size);
382 else if(kind==BasicTypeDeclaration::VOID)
383 writer.write_op(content.globals, OP_TYPE_VOID, type_id);
384 else if(kind==BasicTypeDeclaration::BOOL)
385 writer.write_op(content.globals, OP_TYPE_BOOL, type_id);
386 else if(kind==BasicTypeDeclaration::INT)
387 writer.write_op(content.globals, OP_TYPE_INT, type_id, 32, sign);
388 else if(kind==BasicTypeDeclaration::FLOAT)
389 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, 32);
391 throw invalid_argument("SpirVGenerator::get_standard_type_id");
396 bool SpirVGenerator::is_scalar_type(Id type_id, BasicTypeDeclaration::Kind kind) const
398 auto i = standard_type_ids.find(TypeKey(kind, true));
399 return (i!=standard_type_ids.end() && i->second==type_id);
402 SpirVGenerator::Id SpirVGenerator::get_array_type_id(TypeDeclaration &base_type, Id size_id, bool extended_align)
404 Id base_type_id = get_id(base_type);
405 Id &array_type_id = array_type_ids[TypeKey(base_type_id, extended_align*0x400000 | size_id)];
408 array_type_id = next_id++;
410 writer.write_op(content.globals, OP_TYPE_ARRAY, array_type_id, base_type_id, size_id);
412 writer.write_op(content.globals, OP_TYPE_RUNTIME_ARRAY, array_type_id, base_type_id);
414 unsigned stride = MemoryRequirementsCalculator().apply(base_type).stride;
416 stride = (stride+15)&~15U;
417 writer.write_op_decorate(array_type_id, DECO_ARRAY_STRIDE, stride);
420 return array_type_id;
423 SpirVGenerator::Id SpirVGenerator::get_pointer_type_id(Id type_id, StorageClass storage)
425 Id &ptr_type_id = pointer_type_ids[TypeKey(type_id, storage)];
428 ptr_type_id = next_id++;
429 writer.write_op(content.globals, OP_TYPE_POINTER, ptr_type_id, storage, type_id);
434 SpirVGenerator::Id SpirVGenerator::get_variable_type_id(const VariableDeclaration &var)
436 if(const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var.type_declaration))
437 if(basic->kind==BasicTypeDeclaration::ARRAY)
440 throw logic_error("array without size");
442 SetFlag set_const(constant_expression);
443 r_expression_result_id = 0;
444 var.array_size->visit(*this);
445 return get_array_type_id(*basic->base_type, r_expression_result_id, basic->extended_alignment);
448 return get_id(*var.type_declaration);
451 SpirVGenerator::Id SpirVGenerator::get_load_id(VariableDeclaration &var)
453 Id &load_result_id = variable_load_ids[&var];
456 load_result_id = next_id++;
457 writer.write_op(content.function_body, OP_LOAD, get_variable_type_id(var), load_result_id, get_id(var));
459 return load_result_id;
462 void SpirVGenerator::prune_loads(Id min_id)
464 for(auto i=variable_load_ids.begin(); i!=variable_load_ids.end(); )
466 if(i->second>=min_id)
467 variable_load_ids.erase(i++);
473 SpirVGenerator::Id SpirVGenerator::begin_expression(Opcode opcode, Id type_id, unsigned n_args)
475 bool has_result = (opcode==OP_FUNCTION_CALL || !is_scalar_type(type_id, BasicTypeDeclaration::VOID));
476 if(!constant_expression)
478 if(!current_function)
479 throw internal_error("non-constant expression outside a function");
481 writer.begin_op(content.function_body, opcode, (n_args ? 1+has_result*2+n_args : 0));
483 else if(opcode==OP_COMPOSITE_CONSTRUCT)
484 writer.begin_op(content.globals, (spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE),
485 (n_args ? 1+has_result*2+n_args : 0));
486 else if(!spec_constant)
487 throw internal_error("invalid non-specialization constant expression");
489 writer.begin_op(content.globals, OP_SPEC_CONSTANT_OP, (n_args ? 2+has_result*2+n_args : 0));
491 Id result_id = next_id++;
494 writer.write(type_id);
495 writer.write(result_id);
497 if(spec_constant && opcode!=OP_COMPOSITE_CONSTRUCT)
498 writer.write(opcode);
503 void SpirVGenerator::end_expression(Opcode opcode)
505 if(constant_expression)
506 opcode = (opcode==OP_COMPOSITE_CONSTRUCT ? spec_constant ? OP_SPEC_CONSTANT_COMPOSITE : OP_CONSTANT_COMPOSITE : OP_SPEC_CONSTANT_OP);
507 writer.end_op(opcode);
510 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id arg_id)
512 Id result_id = begin_expression(opcode, type_id, 1);
513 writer.write(arg_id);
514 end_expression(opcode);
518 SpirVGenerator::Id SpirVGenerator::write_expression(Opcode opcode, Id type_id, Id left_id, Id right_id)
520 Id result_id = begin_expression(opcode, type_id, 2);
521 writer.write(left_id);
522 writer.write(right_id);
523 end_expression(opcode);
527 void SpirVGenerator::write_deconstruct(Id elem_type_id, Id composite_id, Id *elem_ids, unsigned n_elems)
529 for(unsigned i=0; i<n_elems; ++i)
531 elem_ids[i] = begin_expression(OP_COMPOSITE_EXTRACT, elem_type_id, 2);
532 writer.write(composite_id);
534 end_expression(OP_COMPOSITE_EXTRACT);
538 SpirVGenerator::Id SpirVGenerator::write_construct(Id type_id, const Id *elem_ids, unsigned n_elems)
540 Id result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, type_id, n_elems);
541 for(unsigned i=0; i<n_elems; ++i)
542 writer.write(elem_ids[i]);
543 end_expression(OP_COMPOSITE_CONSTRUCT);
548 void SpirVGenerator::visit(Block &block)
550 for(const RefPtr<Statement> &s: block.body)
554 void SpirVGenerator::visit(Literal &literal)
556 Id type_id = get_id(*literal.type);
558 r_expression_result_id = write_constant(type_id, get_constant_key(type_id, literal.value).int_value, true);
560 r_expression_result_id = get_constant_id(type_id, literal.value);
561 r_constant_result = true;
564 void SpirVGenerator::visit(VariableReference &var)
566 if(constant_expression || var.declaration->constant)
568 if(!var.declaration->constant)
569 throw internal_error("reference to non-constant variable in constant context");
571 r_expression_result_id = get_id(*var.declaration);
572 r_constant_result = true;
575 else if(!current_function)
576 throw internal_error("non-constant context outside a function");
578 r_constant_result = false;
581 r_expression_result_id = 0;
582 if(!assignment_source_id)
584 auto i = variable_load_ids.find(var.declaration);
585 if(i!=variable_load_ids.end())
586 r_expression_result_id = i->second;
588 if(!r_expression_result_id)
589 r_composite_base = var.declaration;
591 else if(assignment_source_id)
593 writer.write_op(content.function_body, OP_STORE, get_id(*var.declaration), assignment_source_id);
594 variable_load_ids[var.declaration] = assignment_source_id;
595 r_expression_result_id = assignment_source_id;
598 r_expression_result_id = get_load_id(*var.declaration);
601 void SpirVGenerator::generate_composite_access(TypeDeclaration &result_type)
604 Id result_type_id = get_id(result_type);
605 Id access_type_id = result_type_id;
608 if(constant_expression)
609 throw internal_error("composite access through pointer in constant context");
611 Id int32_type_id = get_standard_type_id(BasicTypeDeclaration::INT, 1);
612 for(unsigned &i: r_composite_chain)
613 i = (i<0x400000 ? get_constant_id(int32_type_id, static_cast<int>(i)) : i&0x3FFFFF);
615 /* Find the storage class of the base and obtain appropriate pointer type
617 const Declaration &base_decl = get_item(declared_ids, r_composite_base);
618 auto i = pointer_type_ids.begin();
619 for(; (i!=pointer_type_ids.end() && i->second!=base_decl.type_id); ++i) ;
620 if(i==pointer_type_ids.end())
621 throw internal_error("could not find storage class");
622 access_type_id = get_pointer_type_id(result_type_id, static_cast<StorageClass>(i->first.detail));
624 opcode = OP_ACCESS_CHAIN;
626 else if(assignment_source_id)
627 throw internal_error("assignment to temporary composite");
630 for(unsigned &i: r_composite_chain)
631 for(auto j=constant_ids.begin(); (i>=0x400000 && j!=constant_ids.end()); ++j)
632 if(j->second==(i&0x3FFFFF))
633 i = j->first.int_value;
635 opcode = OP_COMPOSITE_EXTRACT;
638 Id access_id = begin_expression(opcode, access_type_id, 1+r_composite_chain.size());
639 writer.write(r_composite_base_id);
640 for(unsigned i: r_composite_chain)
642 end_expression(opcode);
644 r_constant_result = false;
647 if(assignment_source_id)
649 writer.write_op(content.function_body, OP_STORE, access_id, assignment_source_id);
650 r_expression_result_id = assignment_source_id;
653 r_expression_result_id = write_expression(OP_LOAD, result_type_id, access_id);
656 r_expression_result_id = access_id;
659 void SpirVGenerator::visit_composite(Expression &base_expr, unsigned index, TypeDeclaration &type)
661 if(!composite_access)
663 r_composite_base = 0;
664 r_composite_base_id = 0;
665 r_composite_chain.clear();
669 SetFlag set_composite(composite_access);
670 base_expr.visit(*this);
673 if(!r_composite_base_id)
674 r_composite_base_id = (r_composite_base ? get_id(*r_composite_base) : r_expression_result_id);
676 r_composite_chain.push_back(index);
677 if(!composite_access)
678 generate_composite_access(type);
680 r_expression_result_id = 0;
683 void SpirVGenerator::visit_isolated(Expression &expr)
685 SetForScope<Id> clear_assign(assignment_source_id, 0);
686 SetFlag clear_composite(composite_access, false);
687 SetForScope<Node *> clear_base(r_composite_base, 0);
688 SetForScope<Id> clear_base_id(r_composite_base_id, 0);
689 vector<unsigned> saved_chain;
690 swap(saved_chain, r_composite_chain);
692 swap(saved_chain, r_composite_chain);
695 void SpirVGenerator::visit(MemberAccess &memacc)
697 visit_composite(*memacc.left, memacc.index, *memacc.type);
700 void SpirVGenerator::visit(Swizzle &swizzle)
703 visit_composite(*swizzle.left, swizzle.components[0], *swizzle.type);
704 else if(assignment_source_id)
706 const BasicTypeDeclaration &basic = dynamic_cast<const BasicTypeDeclaration &>(*swizzle.left->type);
709 for(unsigned i=0; i<swizzle.count; ++i)
710 mask |= 1<<swizzle.components[i];
712 visit_isolated(*swizzle.left);
714 Id combined_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.left->type), 2+basic.size);
715 writer.write(r_expression_result_id);
716 writer.write(assignment_source_id);
717 for(unsigned i=0; i<basic.size; ++i)
718 writer.write(i+((mask>>i)&1)*basic.size);
719 end_expression(OP_VECTOR_SHUFFLE);
721 SetForScope<Id> set_assign(assignment_source_id, combined_id);
722 swizzle.left->visit(*this);
724 r_expression_result_id = combined_id;
728 swizzle.left->visit(*this);
729 Id left_id = r_expression_result_id;
731 r_expression_result_id = begin_expression(OP_VECTOR_SHUFFLE, get_id(*swizzle.type), 2+swizzle.count);
732 writer.write(left_id);
733 writer.write(left_id);
734 for(unsigned i=0; i<swizzle.count; ++i)
735 writer.write(swizzle.components[i]);
736 end_expression(OP_VECTOR_SHUFFLE);
738 r_constant_result = false;
741 void SpirVGenerator::visit(UnaryExpression &unary)
744 return visit_isolated(unary);
746 unary.expression->visit(*this);
748 char oper = unary.oper->token[0];
749 char oper2 = unary.oper->token[1];
750 if(oper=='+' && !oper2)
753 BasicTypeDeclaration &basic = dynamic_cast<BasicTypeDeclaration &>(*unary.expression->type);
754 BasicTypeDeclaration &elem = *get_element_type(basic);
756 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
757 /* SPIR-V allows constant operations on floating-point values only for
759 throw internal_error("invalid operands for constant unary expression");
761 Id result_type_id = get_id(*unary.type);
762 Opcode opcode = OP_NOP;
764 r_constant_result = false;
766 opcode = OP_LOGICAL_NOT;
769 else if(oper=='-' && !oper2)
771 opcode = (elem.kind==BasicTypeDeclaration::INT ? OP_S_NEGATE : OP_F_NEGATE);
773 if(basic.kind==BasicTypeDeclaration::MATRIX)
775 Id column_type_id = get_id(*basic.base_type);
776 unsigned n_columns = basic.size&0xFFFF;
778 write_deconstruct(column_type_id, r_expression_result_id, column_ids, n_columns);
779 for(unsigned i=0; i<n_columns; ++i)
780 column_ids[i] = write_expression(opcode, column_type_id, column_ids[i]);
781 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
785 else if((oper=='+' || oper=='-') && oper2==oper)
787 if(constant_expression)
788 throw internal_error("increment or decrement in constant expression");
791 if(elem.kind==BasicTypeDeclaration::INT)
793 opcode = (oper=='+' ? OP_I_ADD : OP_I_SUB);
794 one_id = get_constant_id(get_id(elem), 1);
796 else if(elem.kind==BasicTypeDeclaration::FLOAT)
798 opcode = (oper=='+' ? OP_F_ADD : OP_F_SUB);
799 one_id = get_constant_id(get_id(elem), 1.0f);
802 throw internal_error("invalid increment/decrement");
804 if(basic.kind==BasicTypeDeclaration::VECTOR)
805 one_id = get_vector_constant_id(result_type_id, basic.size, one_id);
807 Id post_value_id = write_expression(opcode, result_type_id, r_expression_result_id, one_id);
809 SetForScope<Id> set_assign(assignment_source_id, post_value_id);
810 unary.expression->visit(*this);
812 r_expression_result_id = (unary.oper->type==Operator::POSTFIX ? r_expression_result_id : post_value_id);
817 throw internal_error("unknown unary operator");
819 r_expression_result_id = write_expression(opcode, result_type_id, r_expression_result_id);
822 void SpirVGenerator::visit(BinaryExpression &binary)
824 char oper = binary.oper->token[0];
827 visit_isolated(*binary.right);
828 return visit_composite(*binary.left, 0x400000|r_expression_result_id, *binary.type);
830 else if(composite_access)
831 return visit_isolated(binary);
833 if(assignment_source_id)
834 throw internal_error("invalid binary expression in assignment target");
836 BasicTypeDeclaration &basic_left = dynamic_cast<BasicTypeDeclaration &>(*binary.left->type);
837 BasicTypeDeclaration &basic_right = dynamic_cast<BasicTypeDeclaration &>(*binary.right->type);
838 // Expression resolver ensures that element types are the same
839 BasicTypeDeclaration &elem = *get_element_type(basic_left);
841 if(constant_expression && elem.kind!=BasicTypeDeclaration::BOOL && elem.kind!=BasicTypeDeclaration::INT)
842 /* SPIR-V allows constant operations on floating-point values only for
844 throw internal_error("invalid operands for constant binary expression");
846 binary.left->visit(*this);
847 Id left_id = r_expression_result_id;
848 binary.right->visit(*this);
849 Id right_id = r_expression_result_id;
851 Id result_type_id = get_id(*binary.type);
852 Opcode opcode = OP_NOP;
853 bool swap_operands = false;
855 r_constant_result = false;
857 char oper2 = binary.oper->token[1];
858 if((oper=='<' || oper=='>') && oper2!=oper)
860 if(basic_left.kind==BasicTypeDeclaration::INT)
863 opcode = (oper=='<' ? (oper2=='=' ? OP_S_LESS_THAN_EQUAL : OP_S_LESS_THAN) :
864 (oper2=='=' ? OP_S_GREATER_THAN_EQUAL : OP_S_GREATER_THAN));
866 opcode = (oper=='<' ? (oper2=='=' ? OP_U_LESS_THAN_EQUAL : OP_U_LESS_THAN) :
867 (oper2=='=' ? OP_U_GREATER_THAN_EQUAL : OP_U_GREATER_THAN));
869 else if(basic_left.kind==BasicTypeDeclaration::FLOAT)
870 opcode = (oper=='<' ? (oper2=='=' ? OP_F_ORD_LESS_THAN_EQUAL : OP_F_ORD_LESS_THAN) :
871 (oper2=='=' ? OP_F_ORD_GREATER_THAN_EQUAL : OP_F_ORD_GREATER_THAN));
873 else if((oper=='=' || oper=='!') && oper2=='=')
875 if(elem.kind==BasicTypeDeclaration::BOOL)
876 opcode = (oper=='=' ? OP_LOGICAL_EQUAL : OP_LOGICAL_NOT_EQUAL);
877 else if(elem.kind==BasicTypeDeclaration::INT)
878 opcode = (oper=='=' ? OP_I_EQUAL : OP_I_NOT_EQUAL);
879 else if(elem.kind==BasicTypeDeclaration::FLOAT)
880 opcode = (oper=='=' ? OP_F_ORD_EQUAL : OP_F_ORD_NOT_EQUAL);
882 if(opcode!=OP_NOP && basic_left.base_type)
884 /* The SPIR-V equality operations produce component-wise results, but
885 GLSL operators return a single boolean. Use the any/all operations to
886 combine the results. */
887 Opcode combine_op = (oper=='!' ? OP_ANY : OP_ALL);
888 unsigned n_elems = basic_left.size&0xFFFF;
889 Id bool_vec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, n_elems);
892 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
893 compare_id = write_expression(opcode, bool_vec_type_id, left_id, right_id);
894 else if(basic_left.kind==BasicTypeDeclaration::MATRIX)
896 Id column_type_id = get_id(*basic_left.base_type);
898 write_deconstruct(column_type_id, left_id, column_ids, n_elems);
899 write_deconstruct(column_type_id, right_id, column_ids+4, n_elems);
901 Id column_bvec_type_id = get_standard_type_id(BasicTypeDeclaration::BOOL, basic_left.size>>16);
902 for(unsigned i=0; i<n_elems; ++i)
904 compare_id = write_expression(opcode, column_bvec_type_id, column_ids[i], column_ids[4+i]);
905 column_ids[i] = write_expression(combine_op, result_type_id, compare_id);;
908 compare_id = write_construct(bool_vec_type_id, column_ids, n_elems);
912 r_expression_result_id = write_expression(combine_op, result_type_id, compare_id);
916 else if(oper2=='&' && elem.kind==BasicTypeDeclaration::BOOL)
917 opcode = OP_LOGICAL_AND;
918 else if(oper2=='|' && elem.kind==BasicTypeDeclaration::BOOL)
919 opcode = OP_LOGICAL_OR;
920 else if(oper2=='^' && elem.kind==BasicTypeDeclaration::BOOL)
921 opcode = OP_LOGICAL_NOT_EQUAL;
922 else if(oper=='&' && elem.kind==BasicTypeDeclaration::INT)
923 opcode = OP_BITWISE_AND;
924 else if(oper=='|' && elem.kind==BasicTypeDeclaration::INT)
925 opcode = OP_BITWISE_OR;
926 else if(oper=='^' && elem.kind==BasicTypeDeclaration::INT)
927 opcode = OP_BITWISE_XOR;
928 else if(oper=='<' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
929 opcode = OP_SHIFT_LEFT_LOGICAL;
930 else if(oper=='>' && oper2==oper && elem.kind==BasicTypeDeclaration::INT)
931 opcode = OP_SHIFT_RIGHT_ARITHMETIC;
932 else if(oper=='%' && elem.kind==BasicTypeDeclaration::INT)
933 opcode = (elem.sign ? OP_S_MOD : OP_U_MOD);
934 else if(oper=='+' || oper=='-' || oper=='*' || oper=='/')
936 Opcode elem_op = OP_NOP;
937 if(elem.kind==BasicTypeDeclaration::INT)
940 elem_op = (elem.sign ? OP_S_DIV : OP_U_DIV);
942 elem_op = (oper=='+' ? OP_I_ADD : oper=='-' ? OP_I_SUB : OP_I_MUL);
944 else if(elem.kind==BasicTypeDeclaration::FLOAT)
945 elem_op = (oper=='+' ? OP_F_ADD : oper=='-' ? OP_F_SUB : oper=='*' ? OP_F_MUL : OP_F_DIV);
947 if(oper=='*' && (basic_left.base_type || basic_right.base_type) && elem.kind==BasicTypeDeclaration::FLOAT)
949 /* Multiplication between floating-point vectors and matrices has
950 dedicated operations. */
951 if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
952 opcode = OP_MATRIX_TIMES_MATRIX;
953 else if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
955 if(basic_left.kind==BasicTypeDeclaration::VECTOR)
956 opcode = OP_VECTOR_TIMES_MATRIX;
957 else if(basic_right.kind==BasicTypeDeclaration::VECTOR)
958 opcode = OP_MATRIX_TIMES_VECTOR;
961 opcode = OP_MATRIX_TIMES_SCALAR;
962 swap_operands = (basic_right.kind==BasicTypeDeclaration::MATRIX);
965 else if(basic_left.kind==BasicTypeDeclaration::VECTOR && basic_right.kind==BasicTypeDeclaration::VECTOR)
969 opcode = OP_VECTOR_TIMES_SCALAR;
970 swap_operands = (basic_right.kind==BasicTypeDeclaration::VECTOR);
973 else if((basic_left.base_type!=0)!=(basic_right.base_type!=0))
975 /* One operand is scalar and the other is a vector or a matrix.
976 Expand the scalar to a vector of appropriate size. */
977 Id &scalar_id = (basic_left.base_type ? right_id : left_id);
978 BasicTypeDeclaration *vector_type = (basic_left.base_type ? &basic_left : &basic_right);
979 if(vector_type->kind==BasicTypeDeclaration::MATRIX)
980 vector_type = dynamic_cast<BasicTypeDeclaration *>(vector_type->base_type);
981 Id vector_type_id = get_id(*vector_type);
983 Id expanded_id = begin_expression(OP_COMPOSITE_CONSTRUCT, vector_type_id, vector_type->size);
984 for(unsigned i=0; i<vector_type->size; ++i)
985 writer.write(scalar_id);
986 end_expression(OP_COMPOSITE_CONSTRUCT);
988 scalar_id = expanded_id;
990 if(basic_left.kind==BasicTypeDeclaration::MATRIX || basic_right.kind==BasicTypeDeclaration::MATRIX)
992 // Apply matrix operation column-wise.
993 Id matrix_id = (basic_left.base_type ? left_id : right_id);
996 unsigned n_columns = (basic_left.base_type ? basic_left.size : basic_right.size)&0xFFFF;
997 write_deconstruct(vector_type_id, matrix_id, column_ids, n_columns);
999 for(unsigned i=0; i<n_columns; ++i)
1000 column_ids[i] = write_expression(elem_op, vector_type_id, column_ids[i], expanded_id);
1002 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
1008 else if(basic_left.kind==BasicTypeDeclaration::MATRIX && basic_right.kind==BasicTypeDeclaration::MATRIX)
1011 throw internal_error("non-float matrix multiplication");
1013 /* Other operations involving matrices need to be performed
1015 Id column_type_id = get_id(*basic_left.base_type);
1018 unsigned n_columns = basic_left.size&0xFFFF;
1019 write_deconstruct(column_type_id, left_id, column_ids, n_columns);
1020 write_deconstruct(column_type_id, right_id, column_ids+4, n_columns);
1022 for(unsigned i=0; i<n_columns; ++i)
1023 column_ids[i] = write_expression(elem_op, column_type_id, column_ids[i], column_ids[4+i]);
1025 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
1028 else if(basic_left.kind==basic_right.kind)
1029 // Both operands are either scalars or vectors.
1034 throw internal_error("unknown binary operator");
1037 swap(left_id, right_id);
1039 r_expression_result_id = write_expression(opcode, result_type_id, left_id, right_id);
1042 void SpirVGenerator::visit(Assignment &assign)
1044 if(assign.oper->token[0]!='=')
1045 visit(static_cast<BinaryExpression &>(assign));
1047 assign.right->visit(*this);
1049 SetForScope<Id> set_assign(assignment_source_id, r_expression_result_id);
1050 assign.left->visit(*this);
1051 r_constant_result = false;
1054 void SpirVGenerator::visit(TernaryExpression &ternary)
1056 if(composite_access)
1057 return visit_isolated(ternary);
1058 if(constant_expression)
1060 ternary.condition->visit(*this);
1061 Id condition_id = r_expression_result_id;
1062 ternary.true_expr->visit(*this);
1063 Id true_result_id = r_expression_result_id;
1064 ternary.false_expr->visit(*this);
1065 Id false_result_id = r_expression_result_id;
1067 r_expression_result_id = begin_expression(OP_SELECT, get_id(*ternary.type), 3);
1068 writer.write(condition_id);
1069 writer.write(true_result_id);
1070 writer.write(false_result_id);
1071 end_expression(OP_SELECT);
1076 ternary.condition->visit(*this);
1077 Id condition_id = r_expression_result_id;
1079 Id true_label_id = next_id++;
1080 Id false_label_id = next_id++;
1081 Id merge_block_id = next_id++;
1082 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1083 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, condition_id, true_label_id, false_label_id);
1085 std::map<const VariableDeclaration *, Id> saved_load_ids = variable_load_ids;
1087 writer.write_op_label(true_label_id);
1088 ternary.true_expr->visit(*this);
1089 Id true_result_id = r_expression_result_id;
1090 true_label_id = writer.get_current_block();
1091 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1093 swap(saved_load_ids, variable_load_ids);
1094 writer.write_op_label(false_label_id);
1095 ternary.false_expr->visit(*this);
1096 Id false_result_id = r_expression_result_id;
1097 false_label_id = writer.get_current_block();
1099 writer.write_op_label(merge_block_id);
1100 prune_loads(true_label_id);
1101 r_expression_result_id = begin_expression(OP_PHI, get_id(*ternary.type), 4);
1102 writer.write(true_result_id);
1103 writer.write(true_label_id);
1104 writer.write(false_result_id);
1105 writer.write(false_label_id);
1106 end_expression(OP_PHI);
1108 r_constant_result = false;
1111 void SpirVGenerator::visit(FunctionCall &call)
1113 if(assignment_source_id)
1114 throw internal_error("assignment to function call");
1115 else if(composite_access)
1116 return visit_isolated(call);
1117 else if(call.constructor && call.arguments.size()==1 && call.arguments[0]->type==call.type)
1118 return call.arguments[0]->visit(*this);
1120 vector<Id> argument_ids;
1121 argument_ids.reserve(call.arguments.size());
1122 bool all_args_const = true;
1123 for(const RefPtr<Expression> &a: call.arguments)
1126 argument_ids.push_back(r_expression_result_id);
1127 all_args_const &= r_constant_result;
1130 if(constant_expression && (!call.constructor || !all_args_const))
1131 throw internal_error("function call in constant expression");
1133 Id result_type_id = get_id(*call.type);
1134 r_constant_result = false;
1136 if(call.constructor)
1137 visit_constructor(call, argument_ids, all_args_const);
1138 else if(call.declaration->source==BUILTIN_SOURCE)
1141 for(const RefPtr<Expression> &a: call.arguments)
1142 if(BasicTypeDeclaration *basic_arg = dynamic_cast<BasicTypeDeclaration *>(a->type))
1144 BasicTypeDeclaration &elem_arg = *get_element_type(*basic_arg);
1145 switch(elem_arg.kind)
1147 case BasicTypeDeclaration::BOOL: arg_types += 'b'; break;
1148 case BasicTypeDeclaration::INT: arg_types += (elem_arg.sign ? 'i' : 'u'); break;
1149 case BasicTypeDeclaration::FLOAT: arg_types += 'f'; break;
1150 default: arg_types += '?';
1154 const BuiltinFunctionInfo *builtin_info;
1155 for(builtin_info=builtin_functions; builtin_info->function[0]; ++builtin_info)
1156 if(builtin_info->function==call.name && (!builtin_info->arg_types[0] || builtin_info->arg_types==arg_types))
1159 if(builtin_info->capability)
1160 use_capability(static_cast<Capability>(builtin_info->capability));
1162 if(builtin_info->opcode)
1165 if(builtin_info->extension[0])
1167 opcode = OP_EXT_INST;
1168 Id ext_id = import_extension(builtin_info->extension);
1170 r_expression_result_id = begin_expression(opcode, result_type_id);
1171 writer.write(ext_id);
1172 writer.write(builtin_info->opcode);
1176 opcode = static_cast<Opcode>(builtin_info->opcode);
1177 r_expression_result_id = begin_expression(opcode, result_type_id);
1180 for(unsigned i=0; i<call.arguments.size(); ++i)
1182 if(!builtin_info->arg_order[i] || builtin_info->arg_order[i]>argument_ids.size())
1183 throw internal_error("invalid builtin function info");
1184 writer.write(argument_ids[builtin_info->arg_order[i]-1]);
1187 end_expression(opcode);
1189 else if(builtin_info->handler)
1190 (this->*(builtin_info->handler))(call, argument_ids);
1192 throw internal_error("unknown builtin function "+call.name);
1196 r_expression_result_id = begin_expression(OP_FUNCTION_CALL, result_type_id, 1+call.arguments.size());
1197 writer.write(get_id(*call.declaration->definition));
1198 for(Id i: argument_ids)
1200 end_expression(OP_FUNCTION_CALL);
1202 // Any global variables the called function uses might have changed value
1203 set<Node *> dependencies = DependencyCollector().apply(*call.declaration->definition);
1204 for(Node *n: dependencies)
1205 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(n))
1206 variable_load_ids.erase(var);
1210 void SpirVGenerator::visit_constructor(FunctionCall &call, const vector<Id> &argument_ids, bool all_args_const)
1212 Id result_type_id = get_id(*call.type);
1214 BasicTypeDeclaration *basic = dynamic_cast<BasicTypeDeclaration *>(call.type);
1217 if(dynamic_cast<const StructDeclaration *>(call.type))
1218 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1220 throw internal_error("unconstructable type "+call.name);
1224 SetFlag set_const(constant_expression, constant_expression || all_args_const);
1226 BasicTypeDeclaration &elem = *get_element_type(*basic);
1227 BasicTypeDeclaration &basic_arg0 = dynamic_cast<BasicTypeDeclaration &>(*call.arguments[0]->type);
1228 BasicTypeDeclaration &elem_arg0 = *get_element_type(basic_arg0);
1230 if(basic->kind==BasicTypeDeclaration::MATRIX)
1232 Id col_type_id = get_id(*basic->base_type);
1233 unsigned n_columns = basic->size&0xFFFF;
1234 unsigned n_rows = basic->size>>16;
1237 if(call.arguments.size()==1)
1239 // Construct diagonal matrix from a single scalar.
1240 Id zero_id = get_constant_id(get_id(elem), 0.0f);
1241 for(unsigned i=0; i<n_columns; ++i)
1243 column_ids[i] = begin_expression(OP_COMPOSITE_CONSTRUCT, col_type_id, n_rows);
1244 for(unsigned j=0; j<n_rows; ++j)
1245 writer.write(j==i ? argument_ids[0] : zero_id);
1246 end_expression(OP_COMPOSITE_CONSTRUCT);
1250 // Construct a matrix from column vectors
1251 copy(argument_ids.begin(), argument_ids.begin()+n_columns, column_ids);
1253 r_expression_result_id = write_construct(result_type_id, column_ids, n_columns);
1255 else if(basic->kind==BasicTypeDeclaration::VECTOR && (call.arguments.size()>1 || basic_arg0.kind!=BasicTypeDeclaration::VECTOR))
1257 /* There's either a single scalar argument or multiple arguments
1258 which make up the vector's components. */
1259 if(call.arguments.size()==1)
1261 r_expression_result_id = begin_expression(OP_COMPOSITE_CONSTRUCT, result_type_id);
1262 for(unsigned i=0; i<basic->size; ++i)
1263 writer.write(argument_ids[0]);
1264 end_expression(OP_COMPOSITE_CONSTRUCT);
1267 r_expression_result_id = write_construct(result_type_id, &argument_ids[0], argument_ids.size());
1269 else if(elem.kind==BasicTypeDeclaration::BOOL)
1271 if(constant_expression)
1272 throw internal_error("unconverted constant");
1274 // Conversion to boolean is implemented as comparing against zero.
1275 Id number_type_id = get_id(elem_arg0);
1276 Id zero_id = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ?
1277 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1278 if(basic_arg0.kind==BasicTypeDeclaration::VECTOR)
1279 zero_id = get_vector_constant_id(get_id(basic_arg0), basic_arg0.size, zero_id);
1281 Opcode opcode = (elem_arg0.kind==BasicTypeDeclaration::FLOAT ? OP_F_ORD_NOT_EQUAL : OP_I_NOT_EQUAL);
1282 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0], zero_id);
1284 else if(elem_arg0.kind==BasicTypeDeclaration::BOOL)
1286 if(constant_expression)
1287 throw internal_error("unconverted constant");
1289 /* Conversion from boolean is implemented as selecting from zero
1291 Id number_type_id = get_id(elem);
1292 Id zero_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1293 get_constant_id(number_type_id, 0.0f) : get_constant_id(number_type_id, 0));
1294 Id one_id = (elem.kind==BasicTypeDeclaration::FLOAT ?
1295 get_constant_id(number_type_id, 1.0f) : get_constant_id(number_type_id, 1));
1296 if(basic->kind==BasicTypeDeclaration::VECTOR)
1298 zero_id = get_vector_constant_id(get_id(*basic), basic->size, zero_id);
1299 one_id = get_vector_constant_id(get_id(*basic), basic->size, one_id);
1302 r_expression_result_id = begin_expression(OP_SELECT, result_type_id, 3);
1303 writer.write(argument_ids[0]);
1304 writer.write(zero_id);
1305 writer.write(one_id);
1306 end_expression(OP_SELECT);
1310 if(constant_expression)
1311 throw internal_error("unconverted constant");
1313 // Scalar or vector conversion between types of equal size.
1315 if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::FLOAT)
1316 opcode = (elem.sign ? OP_CONVERT_F_TO_S : OP_CONVERT_F_TO_U);
1317 else if(elem.kind==BasicTypeDeclaration::FLOAT && elem_arg0.kind==BasicTypeDeclaration::INT)
1318 opcode = (elem_arg0.sign ? OP_CONVERT_S_TO_F : OP_CONVERT_U_TO_F);
1319 else if(elem.kind==BasicTypeDeclaration::INT && elem_arg0.kind==BasicTypeDeclaration::INT)
1320 opcode = OP_BITCAST;
1322 throw internal_error("invalid conversion");
1324 r_expression_result_id = write_expression(opcode, result_type_id, argument_ids[0]);
1328 void SpirVGenerator::visit_builtin_matrix_comp_mult(FunctionCall &call, const vector<Id> &argument_ids)
1330 if(argument_ids.size()!=2)
1331 throw internal_error("invalid matrixCompMult call");
1333 const BasicTypeDeclaration &basic_arg0 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[0]->type);
1334 Id column_type_id = get_id(*basic_arg0.base_type);
1337 unsigned n_columns = basic_arg0.size&0xFFFF;
1338 write_deconstruct(column_type_id, argument_ids[0], column_ids, n_columns);
1339 write_deconstruct(column_type_id, argument_ids[1], column_ids+4, n_columns);
1341 for(unsigned i=0; i<n_columns; ++i)
1342 column_ids[i] = write_expression(OP_F_MUL, column_type_id, column_ids[i], column_ids[4+i]);
1344 r_expression_result_id = write_construct(get_id(*call.type), column_ids, n_columns);
1347 void SpirVGenerator::visit_builtin_texture_query(FunctionCall &call, const vector<Id> &argument_ids)
1349 if(argument_ids.size()<1)
1350 throw internal_error("invalid texture query call");
1353 if(call.name=="textureSize")
1354 opcode = OP_IMAGE_QUERY_SIZE_LOD;
1355 else if(call.name=="imageSize")
1356 opcode = OP_IMAGE_QUERY_SIZE;
1357 else if(call.name=="textureQueryLod")
1358 opcode = OP_IMAGE_QUERY_LOD;
1359 else if(call.name=="textureQueryLevels")
1360 opcode = OP_IMAGE_QUERY_LEVELS;
1361 else if(call.name=="textureSamples" || call.name=="imageSamples")
1362 opcode = OP_IMAGE_QUERY_SAMPLES;
1364 throw internal_error("invalid texture query call");
1366 ImageTypeDeclaration &image_arg0 = dynamic_cast<ImageTypeDeclaration &>(*call.arguments[0]->type);
1369 if(image_arg0.sampled && opcode!=OP_IMAGE_QUERY_LOD)
1371 Id image_type_id = get_item(image_type_ids, get_id(image_arg0));
1372 image_id = write_expression(OP_IMAGE, image_type_id, argument_ids[0]);
1375 image_id = argument_ids[0];
1377 Id result_type_id = get_id(*call.type);
1378 r_expression_result_id = begin_expression(opcode, result_type_id, argument_ids.size());
1379 writer.write(image_id);
1380 for(unsigned i=1; i<argument_ids.size(); ++i)
1381 writer.write(argument_ids[i]);
1382 end_expression(opcode);
1385 void SpirVGenerator::visit_builtin_texture(FunctionCall &call, const vector<Id> &argument_ids)
1387 if(argument_ids.size()<2)
1388 throw internal_error("invalid texture sampling call");
1390 bool explicit_lod = (stage->type!=Stage::FRAGMENT || call.name=="textureLod");
1391 Id lod_id = (!explicit_lod ? 0 : call.name=="textureLod" ? argument_ids.back() :
1392 get_constant_id(get_standard_type_id(BasicTypeDeclaration::FLOAT, 1), 0.0f));
1394 const ImageTypeDeclaration &image = dynamic_cast<const ImageTypeDeclaration &>(*call.arguments[0]->type);
1397 Id result_type_id = get_id(*call.type);
1401 if(argument_ids.size()==2)
1403 const BasicTypeDeclaration &basic_arg1 = dynamic_cast<const BasicTypeDeclaration &>(*call.arguments[1]->type);
1404 dref_id = begin_expression(OP_COMPOSITE_EXTRACT, get_id(*basic_arg1.base_type), 2);
1405 writer.write(argument_ids.back());
1406 writer.write(basic_arg1.size-1);
1407 end_expression(OP_COMPOSITE_EXTRACT);
1410 dref_id = argument_ids[2];
1412 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_DREF_EXPLICIT_LOD : OP_IMAGE_SAMPLE_DREF_IMPLICIT_LOD);
1413 r_expression_result_id = begin_expression(opcode, result_type_id, 3+explicit_lod*2);
1417 opcode = (explicit_lod ? OP_IMAGE_SAMPLE_EXPLICIT_LOD : OP_IMAGE_SAMPLE_IMPLICIT_LOD);
1418 r_expression_result_id = begin_expression(opcode, result_type_id, 2+explicit_lod*2);
1421 for(unsigned i=0; i<2; ++i)
1422 writer.write(argument_ids[i]);
1424 writer.write(dref_id);
1427 writer.write(2); // Lod
1428 writer.write(lod_id);
1431 end_expression(opcode);
1434 void SpirVGenerator::visit_builtin_texture_fetch(FunctionCall &call, const vector<Id> &argument_ids)
1436 const ImageTypeDeclaration &image = dynamic_cast<const ImageTypeDeclaration &>(*call.arguments[0]->type);
1439 if(call.name=="texelFetch")
1440 opcode = OP_IMAGE_FETCH;
1441 else if(call.name=="imageLoad")
1442 opcode = OP_IMAGE_READ;
1444 throw internal_error("invalid texture fetch call");
1446 bool need_sample = image.multisample;
1447 bool need_lod = (opcode==OP_IMAGE_FETCH && !need_sample);
1449 if(argument_ids.size()!=2U+need_sample+need_lod)
1450 throw internal_error("invalid texture fetch call");
1452 r_expression_result_id = begin_expression(opcode, get_id(*call.type), 2+(need_lod|need_sample)+need_lod+need_sample);
1453 for(unsigned i=0; i<2; ++i)
1454 writer.write(argument_ids[i]);
1455 if(need_lod || need_sample)
1457 writer.write(need_lod*0x02 | need_sample*0x40);
1458 writer.write(argument_ids.back());
1460 end_expression(opcode);
1463 void SpirVGenerator::visit_builtin_texture_store(FunctionCall &call, const vector<Id> &argument_ids)
1465 if(argument_ids.size()!=3)
1466 throw internal_error("invalid texture store call");
1468 const ImageTypeDeclaration &image = dynamic_cast<const ImageTypeDeclaration &>(*call.arguments[0]->type);
1470 begin_expression(OP_IMAGE_WRITE, get_id(*call.type), 3+image.multisample*2);
1471 for(unsigned i=0; i<2; ++i)
1472 writer.write(argument_ids[i]);
1473 writer.write(argument_ids.back());
1474 if(image.multisample)
1476 writer.write(0x40); // Sample
1477 writer.write(argument_ids[2]);
1479 end_expression(OP_IMAGE_WRITE);
1481 r_expression_result_id = 0;
1484 void SpirVGenerator::visit_builtin_interpolate(FunctionCall &call, const vector<Id> &argument_ids)
1486 if(argument_ids.size()<1)
1487 throw internal_error("invalid interpolate call");
1488 const VariableReference *var = dynamic_cast<const VariableReference *>(call.arguments[0].get());
1489 if(!var || !var->declaration || var->declaration->interface!="in")
1490 throw internal_error("invalid interpolate call");
1492 SpirVGlslStd450Opcode opcode;
1493 if(call.name=="interpolateAtCentroid")
1494 opcode = GLSL450_INTERPOLATE_AT_CENTROID;
1495 else if(call.name=="interpolateAtSample")
1496 opcode = GLSL450_INTERPOLATE_AT_SAMPLE;
1497 else if(call.name=="interpolateAtOffset")
1498 opcode = GLSL450_INTERPOLATE_AT_OFFSET;
1500 throw internal_error("invalid interpolate call");
1502 Id ext_id = import_extension("GLSL.std.450");
1503 r_expression_result_id = begin_expression(OP_EXT_INST, get_id(*call.type));
1504 writer.write(ext_id);
1505 writer.write(opcode);
1506 writer.write(get_id(*var->declaration));
1507 for(auto i=argument_ids.begin(); ++i!=argument_ids.end(); )
1509 end_expression(OP_EXT_INST);
1512 void SpirVGenerator::visit(ExpressionStatement &expr)
1514 expr.expression->visit(*this);
1517 void SpirVGenerator::visit(InterfaceLayout &layout)
1519 interface_layouts.push_back(&layout);
1522 bool SpirVGenerator::check_duplicate_type(TypeDeclaration &type)
1524 for(const auto &kvp: declared_ids)
1525 if(TypeDeclaration *type2 = dynamic_cast<TypeDeclaration *>(kvp.first))
1526 if(TypeComparer().apply(type, *type2))
1528 insert_unique(declared_ids, &type, kvp.second);
1535 bool SpirVGenerator::check_standard_type(BasicTypeDeclaration &basic)
1537 const BasicTypeDeclaration *elem = (basic.kind==BasicTypeDeclaration::VECTOR ?
1538 dynamic_cast<const BasicTypeDeclaration *>(basic.base_type) : &basic);
1539 if(!elem || elem->base_type)
1541 if((elem->kind==BasicTypeDeclaration::INT || elem->kind==BasicTypeDeclaration::FLOAT) && elem->size!=32)
1544 Id standard_id = get_standard_type_id(elem->kind, (basic.kind==BasicTypeDeclaration::VECTOR ? basic.size : 1), elem->sign);
1545 insert_unique(declared_ids, &basic, Declaration(standard_id, 0));
1546 writer.write_op_name(standard_id, basic.name);
1551 void SpirVGenerator::visit(BasicTypeDeclaration &basic)
1553 if(check_standard_type(basic))
1555 if(check_duplicate_type(basic))
1557 // Alias types shouldn't exist at this point and arrays are handled elsewhere
1558 if(basic.kind==BasicTypeDeclaration::ALIAS || basic.kind==BasicTypeDeclaration::ARRAY)
1561 Id type_id = allocate_id(basic, 0);
1562 writer.write_op_name(type_id, basic.name);
1566 case BasicTypeDeclaration::INT:
1567 writer.write_op(content.globals, OP_TYPE_INT, type_id, basic.size, basic.sign);
1569 case BasicTypeDeclaration::FLOAT:
1570 writer.write_op(content.globals, OP_TYPE_FLOAT, type_id, basic.size);
1572 case BasicTypeDeclaration::VECTOR:
1573 writer.write_op(content.globals, OP_TYPE_VECTOR, type_id, get_id(*basic.base_type), basic.size);
1575 case BasicTypeDeclaration::MATRIX:
1576 writer.write_op(content.globals, OP_TYPE_MATRIX, type_id, get_id(*basic.base_type), basic.size&0xFFFF);
1579 throw internal_error("unknown basic type");
1583 void SpirVGenerator::visit(ImageTypeDeclaration &image)
1585 if(check_duplicate_type(image))
1588 Id type_id = allocate_id(image, 0);
1590 Id image_id = (image.sampled ? next_id++ : type_id);
1591 writer.begin_op(content.globals, OP_TYPE_IMAGE, 9);
1592 writer.write(image_id);
1593 writer.write(get_id(*image.base_type));
1594 writer.write(image.dimensions-1);
1595 writer.write(image.shadow);
1596 writer.write(image.array);
1597 writer.write(image.multisample);
1598 writer.write(image.sampled ? 1 : 2);
1599 writer.write(get_format(image.format));
1600 writer.end_op(OP_TYPE_IMAGE);
1604 writer.write_op_name(type_id, image.name);
1605 writer.write_op(content.globals, OP_TYPE_SAMPLED_IMAGE, type_id, image_id);
1606 insert_unique(image_type_ids, type_id, image_id);
1609 if(image.dimensions==ImageTypeDeclaration::ONE)
1610 use_capability(image.sampled ? CAP_SAMPLED_1D : CAP_IMAGE_1D);
1611 else if(image.dimensions==ImageTypeDeclaration::CUBE && image.array)
1612 use_capability(image.sampled ? CAP_SAMPLED_CUBE_ARRAY : CAP_IMAGE_CUBE_ARRAY);
1614 if(image.multisample && !image.sampled)
1615 use_capability(CAP_STORAGE_IMAGE_MULTISAMPLE);
1618 void SpirVGenerator::visit(StructDeclaration &strct)
1620 if(check_duplicate_type(strct))
1623 Id type_id = allocate_id(strct, 0);
1624 writer.write_op_name(type_id, (strct.block_name.empty() ? strct.name : strct.block_name));
1626 if(!strct.block_name.empty())
1627 writer.write_op_decorate(type_id, DECO_BLOCK);
1629 bool builtin = !strct.block_name.compare(0, 3, "gl_");
1630 vector<Id> member_type_ids;
1631 member_type_ids.reserve(strct.members.body.size());
1632 for(const RefPtr<Statement> &s: strct.members.body)
1634 const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(s.get());
1638 unsigned index = member_type_ids.size();
1639 member_type_ids.push_back(get_variable_type_id(*var));
1641 writer.write_op_member_name(type_id, index, var->name);
1645 BuiltinSemantic semantic = get_builtin_semantic(var->name);
1646 writer.write_op_member_decorate(type_id, index, DECO_BUILTIN, semantic);
1652 for(const Layout::Qualifier &q: var->layout->qualifiers)
1654 if(q.name=="offset")
1655 writer.write_op_member_decorate(type_id, index, DECO_OFFSET, q.value);
1656 else if(q.name=="column_major")
1657 writer.write_op_member_decorate(type_id, index, DECO_COL_MAJOR);
1658 else if(q.name=="row_major")
1659 writer.write_op_member_decorate(type_id, index, DECO_ROW_MAJOR);
1663 const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(var->type_declaration);
1664 while(basic && basic->kind==BasicTypeDeclaration::ARRAY)
1665 basic = dynamic_cast<const BasicTypeDeclaration *>(basic->base_type);
1666 if(basic && basic->kind==BasicTypeDeclaration::MATRIX)
1668 unsigned stride = MemoryRequirementsCalculator().apply(*basic->base_type).stride;
1669 writer.write_op_member_decorate(type_id, index, DECO_MATRIX_STRIDE, stride);
1674 writer.begin_op(content.globals, OP_TYPE_STRUCT);
1675 writer.write(type_id);
1676 for(Id i: member_type_ids)
1678 writer.end_op(OP_TYPE_STRUCT);
1681 void SpirVGenerator::visit(VariableDeclaration &var)
1683 Id type_id = get_variable_type_id(var);
1688 if(!var.init_expression)
1689 throw internal_error("const variable without initializer");
1691 int spec_id = get_layout_value(var.layout.get(), "constant_id");
1692 Id *spec_var_id = (spec_id>=0 ? &declared_spec_ids[spec_id] : 0);
1693 if(spec_id>=0 && *spec_var_id)
1695 insert_unique(declared_ids, &var, Declaration(*spec_var_id, type_id));
1699 SetFlag set_const(constant_expression);
1700 SetFlag set_spec(spec_constant, spec_id>=0);
1701 r_expression_result_id = 0;
1702 var.init_expression->visit(*this);
1703 var_id = r_expression_result_id;
1704 insert_unique(declared_ids, &var, Declaration(var_id, type_id));
1707 writer.write_op_decorate(var_id, DECO_SPEC_ID, spec_id);
1708 *spec_var_id = var_id;
1713 bool push_const = has_layout_qualifier(var.layout.get(), "push_constant");
1715 StorageClass storage;
1716 if(current_function)
1717 storage = STORAGE_FUNCTION;
1719 storage = STORAGE_PUSH_CONSTANT;
1721 storage = get_interface_storage(var.interface, var.block_declaration);
1723 Id ptr_type_id = get_pointer_type_id(type_id, storage);
1724 if(var.interface=="uniform")
1726 Id &uni_id = declared_uniform_ids[var.block_declaration ? "b"+var.block_declaration->block_name : "v"+var.name];
1729 insert_unique(declared_ids, &var, Declaration(uni_id, ptr_type_id));
1733 uni_id = var_id = allocate_id(var, ptr_type_id);
1736 var_id = allocate_id(var, (var.constant ? type_id : ptr_type_id));
1739 if(var.init_expression)
1741 SetFlag set_const(constant_expression, !current_function);
1742 r_expression_result_id = 0;
1743 r_constant_result = false;
1744 var.init_expression->visit(*this);
1745 init_id = r_expression_result_id;
1748 vector<Word> &target = (current_function ? content.locals : content.globals);
1749 writer.begin_op(target, OP_VARIABLE, 4+(init_id && !current_function));
1750 writer.write(ptr_type_id);
1751 writer.write(var_id);
1752 writer.write(storage);
1753 if(init_id && !current_function)
1754 writer.write(init_id);
1755 writer.end_op(OP_VARIABLE);
1759 for(const Layout::Qualifier &q: var.layout->qualifiers)
1761 if(q.name=="location")
1762 writer.write_op_decorate(var_id, DECO_LOCATION, q.value);
1763 else if(q.name=="set")
1764 writer.write_op_decorate(var_id, DECO_DESCRIPTOR_SET, q.value);
1765 else if(q.name=="binding")
1766 writer.write_op_decorate(var_id, DECO_BINDING, q.value);
1769 if(!var.block_declaration && !var.name.compare(0, 3, "gl_"))
1771 BuiltinSemantic semantic = get_builtin_semantic(var.name);
1772 writer.write_op_decorate(var_id, DECO_BUILTIN, semantic);
1774 if(var.sampling=="flat")
1775 writer.write_op_decorate(var_id, DECO_FLAT);
1776 if(var.sampling=="centroid")
1777 writer.write_op_decorate(var_id, DECO_CENTROID);
1779 if(init_id && current_function)
1781 writer.write_op(content.function_body, OP_STORE, var_id, init_id);
1782 variable_load_ids[&var] = init_id;
1786 if(var.name.find(' ')==string::npos)
1787 writer.write_op_name(var_id, var.name);
1790 void SpirVGenerator::visit_entry_point(FunctionDeclaration &func, Id func_id)
1792 writer.begin_op(content.entry_points, OP_ENTRY_POINT);
1795 case Stage::VERTEX: writer.write(0); break;
1796 case Stage::GEOMETRY: writer.write(3); break;
1797 case Stage::FRAGMENT: writer.write(4); break;
1798 case Stage::COMPUTE: writer.write(5); break;
1799 default: throw internal_error("unknown stage");
1801 writer.write(func_id);
1802 writer.write_string(func.name);
1804 set<Node *> dependencies = DependencyCollector().apply(func);
1805 for(Node *n: dependencies)
1806 if(const VariableDeclaration *var = dynamic_cast<const VariableDeclaration *>(n))
1807 if(!var->interface.empty())
1808 writer.write(get_id(*n));
1810 writer.end_op(OP_ENTRY_POINT);
1812 if(stage->type==Stage::FRAGMENT)
1814 SpirVExecutionMode origin = (features.target_api==VULKAN ? EXEC_ORIGIN_UPPER_LEFT : EXEC_ORIGIN_LOWER_LEFT);
1815 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, origin);
1817 else if(stage->type==Stage::GEOMETRY)
1819 use_capability(CAP_GEOMETRY);
1820 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INVOCATIONS, 1);
1823 unsigned local_size[3] = { 0, 1, 1 };
1825 for(const InterfaceLayout *i: interface_layouts)
1827 for(const Layout::Qualifier &q: i->layout.qualifiers)
1830 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id,
1831 (i->interface=="in" ? EXEC_INPUT_POINTS : EXEC_OUTPUT_POINTS));
1832 else if(q.name=="lines")
1833 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES);
1834 else if(q.name=="lines_adjacency")
1835 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_LINES_ADJACENCY);
1836 else if(q.name=="triangles")
1837 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_TRIANGLES);
1838 else if(q.name=="triangles_adjacency")
1839 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_TRIANGLES_ADJACENCY);
1840 else if(q.name=="line_strip")
1841 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_LINE_STRIP);
1842 else if(q.name=="triangle_strip")
1843 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_TRIANGLE_STRIP);
1844 else if(q.name=="max_vertices")
1845 writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_VERTICES, q.value);
1846 else if(q.name=="local_size_x")
1847 local_size[0] = q.value;
1848 else if(q.name=="local_size_y")
1849 local_size[1] = q.value;
1850 else if(q.name=="local_size_z")
1851 local_size[2] = q.value;
1855 if(stage->type==Stage::COMPUTE && local_size[0])
1857 writer.begin_op(content.exec_modes, OP_EXECUTION_MODE);
1858 writer.write(func_id);
1859 writer.write(EXEC_LOCAL_SIZE);
1860 for(unsigned j=0; j<3; ++j)
1861 writer.write(local_size[j]);
1862 writer.end_op(OP_EXECUTION_MODE);
1866 void SpirVGenerator::visit(FunctionDeclaration &func)
1868 if(func.source==BUILTIN_SOURCE)
1870 else if(func.definition!=&func)
1873 allocate_forward_id(*func.definition);
1877 Id return_type_id = get_id(*func.return_type_declaration);
1878 vector<unsigned> param_type_ids;
1879 param_type_ids.reserve(func.parameters.size());
1880 for(const RefPtr<VariableDeclaration> &p: func.parameters)
1881 param_type_ids.push_back(get_variable_type_id(*p));
1883 string sig_with_return = func.return_type+func.signature;
1884 Id &type_id = function_type_ids[sig_with_return];
1887 type_id = next_id++;
1888 writer.begin_op(content.globals, OP_TYPE_FUNCTION);
1889 writer.write(type_id);
1890 writer.write(return_type_id);
1891 for(unsigned i: param_type_ids)
1893 writer.end_op(OP_TYPE_FUNCTION);
1895 writer.write_op_name(type_id, sig_with_return);
1898 Id func_id = allocate_id(func, type_id);
1899 writer.write_op_name(func_id, func.name+func.signature);
1901 if(func.name=="main")
1902 visit_entry_point(func, func_id);
1904 writer.begin_op(content.functions, OP_FUNCTION, 5);
1905 writer.write(return_type_id);
1906 writer.write(func_id);
1907 writer.write(0); // Function control flags (none)
1908 writer.write(type_id);
1909 writer.end_op(OP_FUNCTION);
1911 for(unsigned i=0; i<func.parameters.size(); ++i)
1913 Id param_id = allocate_id(*func.parameters[i], param_type_ids[i]);
1914 writer.write_op(content.functions, OP_FUNCTION_PARAMETER, param_type_ids[i], param_id);
1915 writer.write_op_name(param_id, func.parameters[i]->name);
1916 // TODO This is probably incorrect if the parameter is assigned to.
1917 variable_load_ids[func.parameters[i].get()] = param_id;
1921 writer.begin_function_body(next_id++);
1922 SetForScope<FunctionDeclaration *> set_func(current_function, &func);
1923 func.body.visit(*this);
1925 if(writer.get_current_block())
1928 writer.write_op(content.function_body, OP_UNREACHABLE);
1931 const BasicTypeDeclaration *basic_return = dynamic_cast<const BasicTypeDeclaration *>(func.return_type_declaration);
1932 if(basic_return && basic_return->kind==BasicTypeDeclaration::VOID)
1933 writer.write_op(content.function_body, OP_RETURN);
1935 throw internal_error("missing return in non-void function");
1938 writer.end_function_body();
1939 variable_load_ids.clear();
1942 void SpirVGenerator::visit(Conditional &cond)
1944 cond.condition->visit(*this);
1946 Id true_label_id = next_id++;
1947 Id merge_block_id = next_id++;
1948 Id false_label_id = (cond.else_body.body.empty() ? merge_block_id : next_id++);
1949 writer.write_op(content.function_body, OP_SELECTION_MERGE, merge_block_id, 0); // Selection control (none)
1950 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, true_label_id, false_label_id);
1952 std::map<const VariableDeclaration *, Id> saved_load_ids = variable_load_ids;
1954 writer.write_op_label(true_label_id);
1955 cond.body.visit(*this);
1956 if(writer.get_current_block())
1957 writer.write_op(content.function_body, OP_BRANCH, merge_block_id);
1959 bool reachable_if_true = reachable;
1962 if(!cond.else_body.body.empty())
1964 swap(saved_load_ids, variable_load_ids);
1965 writer.write_op_label(false_label_id);
1966 cond.else_body.visit(*this);
1967 reachable |= reachable_if_true;
1970 writer.write_op_label(merge_block_id);
1971 prune_loads(true_label_id);
1974 void SpirVGenerator::visit(Iteration &iter)
1976 if(iter.init_statement)
1977 iter.init_statement->visit(*this);
1979 for(Node *n: AssignmentCollector().apply(iter))
1980 if(VariableDeclaration *var = dynamic_cast<VariableDeclaration *>(n))
1981 variable_load_ids.erase(var);
1983 Id header_id = next_id++;
1984 Id continue_id = next_id++;
1985 Id merge_block_id = next_id++;
1987 SetForScope<Id> set_merge(loop_merge_block_id, merge_block_id);
1988 SetForScope<Id> set_continue(loop_continue_target_id, continue_id);
1990 writer.write_op_label(header_id);
1991 writer.write_op(content.function_body, OP_LOOP_MERGE, merge_block_id, continue_id, 0); // Loop control (none)
1993 Id body_id = next_id++;
1996 writer.write_op_label(next_id++);
1997 iter.condition->visit(*this);
1998 writer.write_op(content.function_body, OP_BRANCH_CONDITIONAL, r_expression_result_id, body_id, merge_block_id);
2001 writer.write_op_label(body_id);
2002 iter.body.visit(*this);
2004 writer.write_op_label(continue_id);
2005 if(iter.loop_expression)
2006 iter.loop_expression->visit(*this);
2007 writer.write_op(content.function_body, OP_BRANCH, header_id);
2009 writer.write_op_label(merge_block_id);
2010 prune_loads(header_id);
2014 void SpirVGenerator::visit(Return &ret)
2018 ret.expression->visit(*this);
2019 writer.write_op(content.function_body, OP_RETURN_VALUE, r_expression_result_id);
2022 writer.write_op(content.function_body, OP_RETURN);
2026 void SpirVGenerator::visit(Jump &jump)
2028 if(jump.keyword=="discard")
2029 writer.write_op(content.function_body, OP_KILL);
2030 else if(jump.keyword=="break")
2031 writer.write_op(content.function_body, OP_BRANCH, loop_merge_block_id);
2032 else if(jump.keyword=="continue")
2033 writer.write_op(content.function_body, OP_BRANCH, loop_continue_target_id);
2035 throw internal_error("unknown jump");
2040 SpirVGenerator::TypeKey::TypeKey(BasicTypeDeclaration::Kind kind, bool sign):
2045 case BasicTypeDeclaration::VOID: detail = 'v'; break;
2046 case BasicTypeDeclaration::BOOL: detail = 'b'; break;
2047 case BasicTypeDeclaration::INT: detail = (sign ? 'i' : 'u'); break;
2048 case BasicTypeDeclaration::FLOAT: detail = 'f'; break;
2049 default: throw invalid_argument("TypeKey::TypeKey");
2053 bool SpirVGenerator::TypeKey::operator<(const TypeKey &other) const
2055 if(type_id!=other.type_id)
2056 return type_id<other.type_id;
2057 return detail<other.detail;
2061 bool SpirVGenerator::ConstantKey::operator<(const ConstantKey &other) const
2063 if(type_id!=other.type_id)
2064 return type_id<other.type_id;
2065 return int_value<other.int_value;