ssGetDataTypeIsScalingTrivial

Determine whether scaling of registered data type is slope = 1, bias = 0

Syntax

extern int ssGetDataTypeIsScalingTrivial (SimStruct *S, DTypeId
                                          dataTypeId)

Arguments

S

SimStruct representing an S-function block.

dataTypeId

Data type ID of the registered data type for which you want to know whether the scaling is trivial.

Description

This function determines whether the scaling of a registered data type is trivial. In [Slope Bias] representation, fixed-point numbers can be represented as

real-world value = (slope × integer) + bias.

In the trivial case, slope  =  1 and bias  =  0.

In terms of binary-point-only scaling, the binary point is to the right of the least significant bit for trivial scaling, meaning that the fraction length is zero:

real-world value = integer × 2^{–fraction length} = integer × 2⁰.

In either case, trivial scaling means that the real-world value is simply equal to the stored integer value:

real-world value = integer.

Scaling is always trivial for pure integers, such as int8, and also for the true floating-point types single and double.

This function errors out when ssGetDataTypeIsFxpFltApiCompat returns FALSE.

Requirement

To use this function, you must include fixedpoint.h and fixedpoint.c. For more information, see Structure of the S-Function.

Languages

C

TLC Functions

FixPt_DataTypeIsScalingTrivial