Conditions for Code Replacement of Math Operators with QHL

Each math operator 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.

Float Data Type

The library supports these math operators for Float data type input only when you set specific properties, as indicated in this table:

Operators	Float Input Requirements	Float Parameter Requirements	Equivalent Functions
Addition (+)	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 (-)	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	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	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 matrix input Dimension = 2, 3 and 4		Matrix real inputs mw_qhblas_matrix_inverse_af Matrix complex inputs mw_qhblas_matrix_inverse_acf
Comparators	Vector or matrix Real or Complex values Equal (==) Not Equal (~=) 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
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 (.>>)	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
Dot Product	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

Fixed-point Q15 Data Types

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	Fixed-point Q15 Parameter Requirements	Equivalent Functions
Addition (+)	Vector or matrix Real or Complex values	Real Input Length ≥ 16 OR Complex Input Length ≥ 8	Vector and matrix real inputs mw_qhblas_vector_add_ah Vector and matrix complex inputs mw_qhblas_vector_add_ach
Subtraction (-)	Vector or matrix Real or Complex Values	Real Input Length ≥ 16 OR Complex Input Length ≥ 8	Vector and matrix real inputs mw_qhblas_vector_sub_ah Vector and matrix complex inputs mw_qhblas_vector_sub_ach
Element-wise matrix multiplication	Vector or matrix Real values	Real Input Length ≥ 8	Vector and matrix real inputs mw_qhblas_vector_hadamard_ah
Multiplication - Scaling	Vector or matrix Real or Complex values	Real Input Length ≥ 8 OR Complex Input Length ≥ 1	Vector and matrix real inputs mw_qhblas_vector_scaling_ach Vector and matrix complex inputs mw_qhblas_vector_add_acf
Matrix inverse	Real or Complex values Square matrix input Dimension = 2, 3 and 4		Matrix real inputs mw_qhblas_matrix_inverse_af Matrix complex inputs mw_qhblas_matrix_inverse_acf
Comparators	Vector or matrix Real or Complex values Equal (==) Not Equal (~=) 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
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 (.>>)	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
Dot Product	Vector or matrix Real and complex 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