Conditions for Code Replacement of Simulink Blocks with QHL

R2026b

Each Simulink^® block that can be used with the Embedded Coder^® Support Package for Qualcomm^® Hexagon^® Processors requires specific conditions to allow code replacement by using the Qualcomm Hexagon library (QHL). You use this code replacement library to generate C/C++ code from a Simulink model or from MATLAB^® code.

When you satisfy the specified conditions, the generated C/C++ code uses QHL support to achieve optimized execution on Qualcomm Hexagon processors.

Basic Math Operations

QHL supports these Simulink math blocks for floating-point data type only when you configure the required properties, as specified in this table.

Function	Input Requirements	Parameter Requirements	Equivalent Functions
Addition (+)	Input can be vector or matrix Real or Complex Values	Real Input Length > 1000 OR Complex Input Length >= 500	Vector and matrix real inputs qhblas_vector_add_af Vector and matrix complex inputs mw_qhblas_vector_add_acf
Subtraction (-)	Input can be vector or matrix Real or Complex Values	Real Input Length > 1000 OR Complex Input Length >= 500	Vector and matrix real inputs qhblas_vector_sub_af Vector and matrix complex inputs mw_qhblas_vector_sub_acf
Element-wise matrix multiplication	Input can be vector or matrix Real or Complex Values	Real Input Length > 1000 OR Complex Input Length >= 500	Vector and matrix real inputs qhblas_vector_hadamard_af Vector and matrix complex inputs mw_qhblas_vector_hadamard_acf
Multiplication - scaling	Input can be vector or matrix Real or Complex Values	Real Input Length > 1000 OR Complex Input Length >= 500	Vector and matrix real inputs qhblas_vector_add_af Vector and matrix complex inputs mw_qhblas_vector_add_acf
Dot product	Input can be a vector or matrix Real values	Real Input Length > =100	For vector, and matrix real inputs - qhblas_f_vector_dot_af For vector, and matrix complex inputs - qhblas_cf_vector_dot_acf
Absolute	Input must be a scalar, vector, or matrix Real values	Input length must be > 11	Vector, and matrix real inputs qhmath_abs_af
Square-root	Input must be a scalar, vector, or matrix Real values	-	Scalar real inputs qhmath_sqrt_f Vector, and matrix real inputs qhmath_sqrt_af
Reciprocal square-root	Input must be a scalar, vector, or matrix Real values	-	Scalar real inputs qhmath_rsqrt_f Vector, and matrix real inputs qhmath_rsqrt_af
Natural logarithm	Input must be a scalar, vector, or matrix Real and complex values	-	Scalar real inputs qhmath_log_f Vector, and matrix real inputs qhmath_log_af Scalar complex inputs mw_qhcomplex_clog_f Vector and matrix complex inputs mw_qhcomplex_clog_af
Base 2 logarithm	Input must be a scalar, vector, or matrix Real values	-	Scalar real inputs qhmath_log2_f Vector, and matrix real inputs qhmath_log2_af
Common logarithm (base 10)	Input must be a scalar, vector, or matrix Real values	-	Scalar real inputs qhmath_log10_f Vector, and matrix real inputs qhmath_log10_af
Exponential	Input must be a scalar, vector, or matrix Real and complex values	-	Scalar real inputs qhmath_cexp_f vector, and matrix real inputs qhmath_cexp_af scalar complex inputs mw_qhcomplex_cexp_f Vector, and Matrix complex inputs mw_qhcomplex_cexp_af
Power	Input must be a scalar, vector, or matrix Real and complex values	-	Scalar, matrix real inputs (base) and vector, matrix real inputs (exponent) mw_qhmath_pow_f Vector real inputs (base) and scalar real inputs (exponent) qhmath_pow_af Scalar, vector, and matrix complex inputs (base and exponent) mw_qhcomplex_cpow_f
Minimum	Input must be a vector or matrix Real values	Input length must be > 22	Vector and matrix real inputs mw_qhblas_f_vector_self_min_af
Maximum	Input must be a vector or matrix Real values	Input length must be > 22	Vector and matrix real inputs mw_qhblas_f_vector_self_max_af

QHL supports these Simulink math blocks for fixed-point Q15 data type only when you configure the required properties, as specified in this table.

Function	Input Requirements	Input DataType	Parameter Requirements	Equivalent Functions
Addition (+)	Input can be vector or matrix Real or Complex Values	fixdt(1,16,*)	Real Input Length ≥ 16 OR Complex Input Length ≥ 8 Word length must be 16 bits with adjustable fractional length (0–15 bits)	Vector and matrix real inputs mw_qhblas_vector_add_ah Vector and matrix complex inputs mw_qhblas_vector_add_ach
Subtraction (-)	Input can be vector or matrix Real or Complex Values	fixdt(1,16,*)	Real Input Length ≥ 16 OR Complex Input Length ≥ 8 Word length must be 16 bits with adjustable fractional length (0–15 bits)	Vector and matrix real inputs mw_qhblas_vector_sub_ah Vector and matrix complex inputs mw_qhblas_vector_sub_ach
Element-wise matrix multiplication	Input can be vector or matrix Real Value	fixdt(1,16,*)	Real Input Length ≥ 8 Word length must be 16 bits with adjustable fractional length (0–15 bits)	Vector and matrix real inputs mw_qhblas_vector_hadamard_ah
Multiplication - Scaling	Input can be vector or matrix Real or Complex Values	fixdt(1,16,*)	Real Input Length ≥ 8 OR Complex Input Length ≥ 1	Vector and matrix real inputs mw_qhblas_vector_scaling_ah Vector and matrix complex inputs mw_qhblas_vector_add_ach
Dot product	Input can be a vector or matrix Real values	fixdt(1,16,15)	Real Input Length ≥ 100	For vector and matrix real inputs - mw_qhblas_h_vector_dot_ah
Absolute	Input must be a vector or matrix Real values	fixdt(1,16,15)	-	Vector and matrix real inputs mw_qhmath_abs_ah
Square root	Input must be a scalar, vector, or matrix Real unsigned values	fixdt(0,16,*)	-	Scalar real inputs qhmath_sqrt_h Vector and matrix real inputs qhmath_sqrt_ah
Maximum	Input must be a vector or matrix Real values	fixdt(1,16,15)	Input length must be > 22	Vector and matrix real inputs mw_qhblas_h_vector_self_max_ah
Minimum	Input must be a vector or matrix Real values	fixdt(1,16,15)	Input length must be > 22	Vector and matrix real inputs mw_qhblas_h_vector_self_min_ah
Dot product	Input can be a vector or matrix Real values	fixdt(1,16,15)	Real Input Length ≥ 100	For vector and matrix real inputs - mw_qhblas_h_vector_dot_ah

Trigonometric Operations

QHL supports these Simulink trigonometric blocks for floating-point data type only when you configure the required properties, as specified in this table.

Function	Input Requirements	Parameter Requirements	Equivalent Functions
sin	Input must be a scalar, vector or matrix Real or complex Values	-	Scalar real inputs qhmath_sin_f Scalar, vector, and matrix real inputs qhmath_sin_af Scalar, vector, and matrix complex inputs mw_qhcomplex_csin_f
cos	Input must be a scalar, vector or matrix Real or complex Values	-	Scalar real inputs qhmath_cos_f Scalar, vector, and matrix real inputs qhmath_cos_af Scalar, vector, and matrix complex inputs mw_qhcomplex_ccos_f
tan	Input must be a scalar, vector, or matrix Real and complex values	-	Scalar real inputs qhmath_tan_f Vector and matrix real inputs qhmath_tan_af Scalar, vector, and matrix complex inputs mw_qhcomplex_ctan_f
asin	Input must be a scalar, vector or matrix Real and complex values	-	Scalar real inputs qhmath_asin_f Vector, and matrix real inputs qhmath_asin_af Scalar complex inputs mw_qhcomplex_casin_f Vector and matrix complex inputs mw_qhcomplex_casin_af
acos	Input must be a scalar, vector or matrix Real and complex values	-	Scalar real inputs qhmath_acos_f Vector, and matrix real inputs qhmath_acos_af Scalar complex inputs mw_qhcomplex_cacos_f Vector and matrix complex inputs mw_qhcomplex_cacos_af
atan	Input must be a scalar, vector or matrix Real and complex values	-	Scalar real inputs qhmath_atan_f Vector and matrix real inputs qhmath_atan_af Scalar complex inputs mw_qhcomplex_catan_f Vector and matrix complex inputs mw_qhcomplex_catan_af
sinh	Input must be a scalar, vector or matrix Real and complex values	-	Scalar real inputs qhmath_asinh_f Vector and matrix real inputs qhmath_asinh_af Scalar complex inputs mw_qhcomplex_csinh_f Vector and matrix complex inputs mw_qhcomplex_csinh_af
cosh	Input must be a scalar, vector or matrix Real and complex values	-	Scalar real inputs qhmath_acosh_f Vector and matrix real inputs qhmath_acosh_af Scalar complex inputs mw_qhcomplex_ccosh_f Vector and matrix complex inputs mw_qhcomplex_ccosh_af
tanh	Input must be a scalar, vector, or matrix Real and complex values	-	Scalar real inputs qhmath_ctanh_f Vector and matrix real inputs qhmath_ctanh_af Scalar complex inputs mw_qhcomplex_ctanh_f Vector and matrix complex inputs mw_qhcomplex_ccosh_af
Hypotenuse	Input must be a scalar real value	-	Scalar real inputs qhmath_hypot