diff options
| -rw-r--r-- | src/glsl/ir.cpp | 73 | ||||
| -rw-r--r-- | src/glsl/ir.h | 24 | ||||
| -rw-r--r-- | src/glsl/opt_algebraic.cpp | 72 |
3 files changed, 101 insertions, 68 deletions
diff --git a/src/glsl/ir.cpp b/src/glsl/ir.cpp index 87e78eee05..4b886018dc 100644 --- a/src/glsl/ir.cpp +++ b/src/glsl/ir.cpp @@ -742,6 +742,79 @@ ir_constant::has_value(const ir_constant *c) const return true; } +bool +ir_constant::is_zero() const +{ + if (!this->type->is_scalar() && !this->type->is_vector()) + return false; + + for (unsigned c = 0; c < this->type->vector_elements; c++) { + switch (this->type->base_type) { + case GLSL_TYPE_FLOAT: + if (this->value.f[c] != 0.0) + return false; + break; + case GLSL_TYPE_INT: + if (this->value.i[c] != 0) + return false; + break; + case GLSL_TYPE_UINT: + if (this->value.u[c] != 0) + return false; + break; + case GLSL_TYPE_BOOL: + if (this->value.b[c] != false) + return false; + break; + default: + /* The only other base types are structures, arrays, and samplers. + * Samplers cannot be constants, and the others should have been + * filtered out above. + */ + assert(!"Should not get here."); + return false; + } + } + + return true; +} + +bool +ir_constant::is_one() const +{ + if (!this->type->is_scalar() && !this->type->is_vector()) + return false; + + 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) + return false; + break; + case GLSL_TYPE_INT: + if (this->value.i[c] != 1) + return false; + break; + case GLSL_TYPE_UINT: + if (this->value.u[c] != 1) + return false; + break; + case GLSL_TYPE_BOOL: + if (this->value.b[c] != true) + return false; + break; + default: + /* The only other base types are structures, arrays, and samplers. + * Samplers cannot be constants, and the others should have been + * filtered out above. + */ + assert(!"Should not get here."); + return false; + } + } + + return true; +} ir_loop::ir_loop() { diff --git a/src/glsl/ir.h b/src/glsl/ir.h index 80e0f67d6d..6a70dede9b 100644 --- a/src/glsl/ir.h +++ b/src/glsl/ir.h @@ -1441,10 +1441,34 @@ public: /** * Determine whether a constant has the same value as another constant + * + * \sa ir_constant::is_zero, ir_constant::is_one */ bool has_value(const ir_constant *) const; /** + * Determine if a constant has the value zero + * + * \note + * This function always returns \c false for constants that are not + * scalars or vectors. + * + * \sa ir_constant::has_value, ir_constant::is_one + */ + bool is_zero() const; + + /** + * Determine if a constant has the value one + * + * \note + * This function always returns \c false for constants that are not + * scalars or vectors. + * + * \sa ir_constant::has_value, ir_constant::is_zero + */ + bool is_one() const; + + /** * Value of the constant. * * The field used to back the values supplied by the constant is determined diff --git a/src/glsl/opt_algebraic.cpp b/src/glsl/opt_algebraic.cpp index 2ed66db476..c7f5c3b4d6 100644 --- a/src/glsl/opt_algebraic.cpp +++ b/src/glsl/opt_algebraic.cpp @@ -68,80 +68,16 @@ public: bool progress; }; -static bool +static inline bool is_vec_zero(ir_constant *ir) { - int c; - - if (!ir) - return false; - if (!ir->type->is_scalar() && - !ir->type->is_vector()) - return false; - - for (c = 0; c < ir->type->vector_elements; c++) { - switch (ir->type->base_type) { - case GLSL_TYPE_FLOAT: - if (ir->value.f[c] != 0.0) - return false; - break; - case GLSL_TYPE_INT: - if (ir->value.i[c] != 0) - return false; - break; - case GLSL_TYPE_UINT: - if (ir->value.u[c] != 0) - return false; - break; - case GLSL_TYPE_BOOL: - if (ir->value.b[c] != false) - return false; - break; - default: - assert(!"bad base type"); - return false; - } - } - - return true; + return (ir == NULL) ? false : ir->is_zero(); } -static bool +static inline bool is_vec_one(ir_constant *ir) { - int c; - - if (!ir) - return false; - if (!ir->type->is_scalar() && - !ir->type->is_vector()) - return false; - - for (c = 0; c < ir->type->vector_elements; c++) { - switch (ir->type->base_type) { - case GLSL_TYPE_FLOAT: - if (ir->value.f[c] != 1.0) - return false; - break; - case GLSL_TYPE_INT: - if (ir->value.i[c] != 1) - return false; - break; - case GLSL_TYPE_UINT: - if (ir->value.u[c] != 1) - return false; - break; - case GLSL_TYPE_BOOL: - if (ir->value.b[c] != true) - return false; - break; - default: - assert(!"bad base type"); - return false; - } - } - - return true; + return (ir == NULL) ? false : ir->is_one(); } static void |