diff options
Diffstat (limited to 'src/glsl/ir.cpp')
| -rw-r--r-- | src/glsl/ir.cpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/glsl/ir.cpp b/src/glsl/ir.cpp index 69954998bd4..f81bfd1ab8a 100644 --- a/src/glsl/ir.cpp +++ b/src/glsl/ir.cpp @@ -46,6 +46,11 @@ bool ir_rvalue::is_negative_one() const return false; } +bool ir_rvalue::is_basis() const +{ + return false; +} + /** * Modify the swizzle make to move one component to another * @@ -1125,6 +1130,49 @@ ir_constant::is_negative_one() const return true; } +bool +ir_constant::is_basis() const +{ + if (!this->type->is_scalar() && !this->type->is_vector()) + return false; + + if (this->type->is_boolean()) + return false; + + unsigned ones = 0; + for (unsigned c = 0; c < this->type->vector_elements; c++) { + switch (this->type->base_type) { + case GLSL_TYPE_FLOAT: + if (this->value.f[c] == 1.0) + ones++; + else if (this->value.f[c] != 0.0) + return false; + break; + case GLSL_TYPE_INT: + if (this->value.i[c] == 1) + ones++; + else if (this->value.i[c] != 0) + return false; + break; + case GLSL_TYPE_UINT: + if (int(this->value.u[c]) == 1) + ones++; + else if (int(this->value.u[c]) != 0) + return false; + break; + default: + /* The only other base types are structures, arrays, samplers, and + * booleans. Samplers cannot be constants, and the others should + * have been filtered out above. + */ + assert(!"Should not get here."); + return false; + } + } + + return ones == 1; +} + ir_loop::ir_loop() { this->ir_type = ir_type_loop; |