Conditions for Code Replacement of Math Operators with QHL

R2026b

Each math operators 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 when generating C/C++ code from a model or from MATLAB^® code.

If you do not meet the specific requirements, then the generated C/C++ code runs on the Qualcomm Hexagon Processors. However, this generated code does not use library support.

The library supports these math operators for floating-point data type input only when you set specific properties, as indicated in this table.

Operators	Float Input Requirements	Float 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
Matrix inverse	Real or Complex Values square input Dim = 2, 3 and 4	-	Matrix real inputs mw_qhblas_matrix_inverse_af Matrix complex inputs mw_qhblas_matrix_inverse_acf
Conjugate	Input can be a vector or matrix Complex values	-	Vector and matrix complex inputs mw_qhcomplex_conj_af
Comparators	Input can be a vector or matrix Real or Complex values Equal (==) Not Equal (~=) Input can be a vector or matrix Real values Greater than (>) Greater than or equal (>=) Less than (<) Less than or equal (<=)	Equal (==) Real Input Length >= 20 OR Complex Input Length > inf Not Equal (~=) Real Input Length > = 16 OR Complex Input Length > inf Greater than (>) Greater than or equal (>=) Real Input Length > 16 Less than (<) Less than or equal (<=) Real Input Length > 16	Equal (==) - Real - mw_q6_cmp_eq_af Complex - mw_q6_cmp_eq_acf Not Equal (~=) - Real - mw_q6_cmp_neq_af Complex - mw_q6_cmp_neq_acf Greater than (>) - mw_q6_cmp_gt_af Greater than or equal (>=) - mw_q6_cmp_ge_af Less than (<) - mw_q6_cmp_lt_af Less than or equal (<=) - mw_q6_cmp_le_af
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

The library supports these math operators for fixed-point Q15 data types only when you set specific properties, as indicated in this table.

Operators	Fixed-point Q15 Input Requirements	Input DataType	Fixed-point Q15 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

The library supports these integer operations for fixed-point Q15 data types only when you set specific properties, as indicated in this table.

Operators	Fixed-point Q15 Input Requirements	Input DataType	Fixed-point Q15 Parameter Requirements	Equivalent Functions
Shift	Shift value via input port. Input can be a vector or matrix (int32 or uint32) Real value Shift left (<<) Shift right arithmetic (>>) Shift value via dialog. Input can be a vector or matrix (int32 or uint32) Real value Shift left (<<) Shift right arithmetic (>>) Shift right logical (.>>)	int32 uint32	Real Input Length > 26	Shift left (<<) - mw_q6_asl_aw/mw_q6_lsl_aw Shift right arithmetic (>>) - mw_q6_asr_aw Shift right logical (.>>) - mw_q6_lsr_aw