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Add methods to ir_constant to get scalar components in a particular type

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This commit is contained in:
Ian Romanick 2010-06-04 16:30:07 -07:00
parent c9cb1032be
commit 31881908eb
2 changed files with 82 additions and 0 deletions
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68
ir.cpp
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@ -240,6 +240,74 @@ ir_constant::ir_constant(const ir_constant *c, unsigned i)
}
}
bool
ir_constant::get_bool_component(unsigned i) const
{
switch (this->type->base_type) {
case GLSL_TYPE_UINT: return this->value.u[i] != 0;
case GLSL_TYPE_INT: return this->value.i[i] != 0;
case GLSL_TYPE_FLOAT: return ((int)this->value.f[i]) != 0;
case GLSL_TYPE_BOOL: return this->value.b[i];
default: assert(!"Should not get here."); break;
}
/* Must return something to make the compiler happy. This is clearly an
* error case.
*/
return false;
}
float
ir_constant::get_float_component(unsigned i) const
{
switch (this->type->base_type) {
case GLSL_TYPE_UINT: return (float) this->value.u[i];
case GLSL_TYPE_INT: return (float) this->value.i[i];
case GLSL_TYPE_FLOAT: return this->value.f[i];
case GLSL_TYPE_BOOL: return this->value.b[i] ? 1.0 : 0.0;
default: assert(!"Should not get here."); break;
}
/* Must return something to make the compiler happy. This is clearly an
* error case.
*/
return 0.0;
}
int
ir_constant::get_int_component(unsigned i) const
{
switch (this->type->base_type) {
case GLSL_TYPE_UINT: return this->value.u[i];
case GLSL_TYPE_INT: return this->value.i[i];
case GLSL_TYPE_FLOAT: return (int) this->value.f[i];
case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
default: assert(!"Should not get here."); break;
}
/* Must return something to make the compiler happy. This is clearly an
* error case.
*/
return 0;
}
unsigned
ir_constant::get_uint_component(unsigned i) const
{
switch (this->type->base_type) {
case GLSL_TYPE_UINT: return this->value.u[i];
case GLSL_TYPE_INT: return this->value.i[i];
case GLSL_TYPE_FLOAT: return (unsigned) this->value.f[i];
case GLSL_TYPE_BOOL: return this->value.b[i] ? 1 : 0;
default: assert(!"Should not get here."); break;
}
/* Must return something to make the compiler happy. This is clearly an
* error case.
*/
return 0;
}
ir_dereference_variable::ir_dereference_variable(ir_variable *var)
{

14
ir.h
View file

@ -1055,6 +1055,20 @@ public:
return new ir_constant(this->type, &this->value);
}
/**
* Get a particular component of a constant as a specific type
*
* This is useful, for example, to get a value from an integer constant
* as a float or bool. This appears frequently when constructors are
* called with all constant parameters.
*/
/*@{*/
bool get_bool_component(unsigned i) const;
float get_float_component(unsigned i) const;
int get_int_component(unsigned i) const;
unsigned get_uint_component(unsigned i) const;
/*@}*/
/**
* Value of the constant.
*