Code You Can Replace from MATLAB Code - MATLAB & Simulink (original) (raw)
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Code that the code generator replaces depends on the code replacement library (CRL) that you use. By default, the code generator does not apply a code replacement library. Your choice of libraries is dependent on product licensing and whether you have access to custom libraries.
Math Functions
When generating C/C++ code from MATLAB® code, depending on code replacement libraries available in your development environment, you can configure the code generator to replace instances of the following math functions with application-specific implementations.
| Function | Data Type Support | Scalar, Vector, Matrix Support | Real, Complex Support |
|---|---|---|---|
| abs1 | Floating point | ScalarVectorMatrix | RealComplex |
| acos | Floating point | ScalarVectorMatrix | RealComplexComplex input/complex outputReal input/complex output |
| acosd | Floating point | ScalarVectorMatrix | RealComplex |
| acot | Floating point | ScalarVectorMatrix | RealComplex |
| acotd | Floating point | ScalarVectorMatrix | RealComplex |
| acoth | Floating point | ScalarVectorMatrix | RealComplex |
| acsc | Floating point | ScalarVectorMatrix | RealComplex |
| acscd | Floating point | ScalarVectorMatrix | RealComplex |
| acsch | Floating point | ScalarVectorMatrix | RealComplex |
| asec | Floating point | ScalarVectorMatrix | RealComplex |
| asecd | Floating point | ScalarVectorMatrix | RealComplex |
| asech | Floating point | ScalarVectorMatrix | RealComplex |
| asin | Floating point | ScalarVectorMatrix | RealComplexComplex input/complex outputReal input/complex output |
| asind | Floating point | ScalarVectorMatrix | RealComplex |
| atan | Floating point | ScalarVectorMatrix | RealComplexComplex input/complex outputReal input/complex output |
| atan2 | Floating point | ScalarVectorMatrix | Real |
| atan2d | Floating point | ScalarVectorMatrix | Real |
| atand | Floating point | ScalarVectorMatrix | RealComplex |
| cos | Floating point | ScalarVectorMatrix | RealComplexComplex input/complex outputReal input/complex output |
| ceil | Floating-pointScalar | Floating-pointScalar | Floating-pointScalar |
| cosd | Floating point | ScalarVectorMatrix | RealComplex |
| cosh | Floating point | ScalarVectorMatrix | RealComplexComplex input/complex outputReal input/complex output |
| cot | Floating point | ScalarVectorMatrix | RealComplex |
| cotd | Floating point | ScalarVectorMatrix | RealComplex |
| coth | Floating point | ScalarVectorMatrix | RealComplex |
| csc | Floating point | ScalarVectorMatrix | RealComplex |
| cscd | Floating point | ScalarVectorMatrix | RealComplex |
| csch | Floating point | ScalarVectorMatrix | RealComplex |
| exp | Floating point | ScalarVectorMatrix | Real |
| fix | Floating point | Scalar | Real |
| floor | Floating-pointScalar | Floating-pointScalar | Floating-pointScalar |
| hypot | Floating point | ScalarVectorMatrix | Real |
| ldexp | Floating point | Scalar | Real |
| log | Floating point | ScalarVectorMatrix | RealComplex |
| log10 | Floating point | ScalarVectorMatrix | RealComplex |
| log2 | Floating point | ScalarVectorMatrix | RealComplex |
| max | IntegerFloating point | Scalar | Real |
| min | IntegerFloating point | Scalar | Real |
| pow | Floating point | Scalar | Real |
| rem | Floating point | Scalar | Real |
| round | Floating point | Scalar | Real |
| sec | Floating point | ScalarVectorMatrix | RealComplex |
| secd | Floating point | ScalarVectorMatrix | RealComplex |
| sech | Floating point | ScalarVectorMatrix | RealComplex |
| sign | Floating point | Scalar | Real |
| sin | Floating point | ScalarVectorMatrix | RealComplexComplex input/complex outputReal input/complex output |
| sind | Floating point | ScalarVectorMatrix | RealComplex |
| sinh | Floating point | ScalarVectorMatrix | RealComplexComplex input/complex outputReal input/complex output |
| sqrt | Floating point | Scalar | Real |
| tan | Floating point | ScalarVectorMatrix | RealComplexComplex input/complex outputReal input/complex output |
| tand | Floating point | ScalarVectorMatrix | RealComplex |
| tanh | Floating point | ScalarVectorMatrix | RealComplexComplex input/complex outputReal input/complex output |
| 1 Wrap on integer overflow only |
Memory Functions
Depending on code replacement libraries available in your development environment, you can configure the code generator to replace instances of the following memory functions with application-specific implementations.
| Function | Data Type Support | Scalar, Vector, Matrix Support | Real, Complex Support |
|---|---|---|---|
| memcmp | Void pointer (void*) | ScalarVectorMatrix | RealComplex |
| memcpy | Void pointer (void*) | ScalarVectorMatrix | RealComplex |
| memset | Void pointer (void*) | ScalarVectorMatrix | RealComplex |
| memset2zero | Void pointer (void*) | ScalarVectorMatrix | RealComplex |
Some target processors provide optimized functions to set memory to zero. Use the code replacement library programming interface to replace the memset2zero function with more efficient target-specific functions.
Operators
When generating C/C++ code from MATLAB code, depending on code replacement libraries available in your development environment, you can configure the code generator to replace instances of the following operators with application-specific implementations.
Mixed data type support indicates you can specify different data types of different inputs.
| Operator | Key | Data Type Support | Scalar, Vector, Matrix Support | Real, Complex Support |
|---|---|---|---|---|
| Addition (+)1 | RTW_OP_ADD | IntegerFloating pointFixed-pointMixed | ScalarVectorMatrix | RealComplex |
| Subtraction (-)1 | RTW_OP_MINUS | IntegerFloating pointFixed-pointMixed | ScalarVectorMatrix | RealComplex |
| Multiplication (*)2 | RTW_OP_MUL | IntegerFloating pointFixed-pointMixed | ScalarVectorMatrix | RealComplex |
| Division (/) | RTW_OP_DIV | IntegerFloating pointFixed-pointMixed | Scalar | RealComplex |
| Data type conversion (cast) | RTW_OP_CAST | IntegerFloating point3Fixed-pointMixed | ScalarVectorMatrix | RealComplex |
| Shift left (<<) | RTW_OP_SL | IntegerFixed-pointMixed | ScalarVectorMatrix | Real |
| Shift right arithmetic (>>)4 | RTW_OP_SRA | IntegerFixed-pointMixed | ScalarVectorMatrix | Real |
| Shift right logical (>>) | RTW_OP_SRL | IntegerFixed-pointMixed | ScalarVectorMatrix | Real |
| Element-wise matrix multiplication (.*)5 | RTW_OP_ELEM_MUL | IntegerFloating pointFixed-pointMixed | VectorMatrix | RealComplex |
| Complex conjugation | RTW_OP_CONJUGATE | IntegerFloating pointFixed-pointMixed | ScalarVectorMatrix | RealComplex |
| Transposition (.') | RTW_OP_TRANS | IntegerFloating pointFixed-pointMixed | VectorMatrix | RealComplex |
| Hermitian (complex conjugate) transposition (') | RTW_OP_HERMITIAN | IntegerFloating pointFixed-pointMixed | VectorMatrix | RealComplex |
| Multiplication with transposition2 | RTW_OP_TRMUL | IntegerFloating pointFixed-pointMixed | VectorMatrix | RealComplex |
| Multiplication with Hermitian transposition2 | RTW_OP_HMMUL | IntegerFloating pointFixed-pointMixed | VectorMatrix | RealComplex |
| Multiplication followed by shift right arithmetic (u1*u2>>u3)6 | RTW_OP_MUL_SRA | IntegerFixed-point | Scalar | Real |
| Multiplication followed by division (u1*u2/u3)7 | RTW_OP_MULDIV | IntegerFixed-point | Scalar | Real |
| Greater than (>) | RTW_OP_GREATER_THAN | IntegerFloating pointFixed-pointMixed | ScalarVectorMatrix | RealComplex |
| Greater than or equal (>=) | RTW_OP_GREATER_THAN_OR_EQUAL | IntegerFloating pointFixed-pointMixed | ScalarVectorMatrix | RealComplex |
| Less than (<) | RTW_OP_LESS_THAN | IntegerFloating pointFixed-pointMixed | ScalarVectorMatrix | RealComplex |
| Less than or equal (<=) | RTW_OP_LESS_THAN_OR_EQUAL | IntegerFloating pointFixed-pointMixed | ScalarVectorMatrix | RealComplex |
| Equal (==) | RTW_OP_EQUAL | IntegerFloating pointFixed-pointMixed | ScalarVectorMatrix | RealComplex |
| Not equal (!=) | RTW_OP_NOT_EQUAL | IntegerFloating pointFixed-pointMixed | ScalarVectorMatrix | RealComplex |
| 1 See Addition and Subtraction Operator Code Replacement for details to consider when defining mappings for addition and subtraction code replacements.2 Can map to Basic Linear Algebra Subroutine (BLAS) multiplication functions.3 Scaled floating point is not supported.4 Code replacement libraries that provide arithmetic shift right implementations should also provide logical shift right implementations, because some arithmetic shift rights are converted to logical shift rights during code generation.5 Use the multiplication (*) operator (RTW_OP_MUL) for scalar multiplication.6 Requires scalar, real, or fixed-point data types with zero bias; output type of the multiplication operation to accommodate all possible output values; shift operand is an unsigned integer; and net slope is equal to 1 (U1_slope * U2_slope == Mul_output_slope and Mul_output_slope == output_slope_of_shift_operation).7 Requires scalar, real, or fixed-point data types with zero bias; output type of the multiplication operation to accommodate all possible output values; and net slope is equal to 1 (U1_slope * U2_slope == Mul_output_slope == U3_slope * Div_output_slope). |