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complex_jz.h
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complex_jz.h
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/***** complex_jz.h *****/
/**
* Includes all the necessary methods to manipulate complex numbers for the FFT.
*
* Would probably be nicer as an object with overloaded operators. Oh well.
*/
#ifndef STRUCT
#define STRUCT
/**
* Complex Number struct
*/
struct Complex {
float re = 1, im = 0;
};
#endif
/* Assembly-language Complex add function */
extern "C" {
void complexAdd_asm(Complex* a, Complex* b, Complex* c);
void complexSubtract_asm(Complex* a, Complex* b, Complex* c);
void complexMultiply_asm(Complex* a, Complex* b, Complex* c);
void butterfly_asm(Complex* inputs, Complex* outputs, Complex* twiddle);
}
/**
* complexMultiply - Multiply two complex numbers
*/
Complex complexMultiply(Complex a, Complex b);
/**
* complexAdd - Add two complex numbers
*/
Complex complexAdd(Complex a, Complex b);
/**
* complexSubtract - Subtract a complex number (b) from another (a)
*/
Complex complexSubtract(Complex a, Complex b);
/**
* calculateNegativeComplex - Finds the negative of a complex number struct
*/
Complex calculateNegativeComplex(Complex a);