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44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
#ifndef SPQLIOS_FFT64_DFT_H
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#define SPQLIOS_FFT64_DFT_H
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#include "negacyclic_polynomial.h"
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#include "reim4_elem.h"
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class reim_fft64vec {
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std::vector<double> v;
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public:
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reim_fft64vec() = default;
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explicit reim_fft64vec(uint64_t n);
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reim_fft64vec(uint64_t n, const double* data);
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uint64_t nn() const;
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static reim_fft64vec zero(uint64_t n);
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/** random complex coefficients (unstructured) */
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static reim_fft64vec random(uint64_t n, double log2bound);
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/** random fft of a small int polynomial */
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static reim_fft64vec dft_random(uint64_t n, uint64_t log2bound);
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double* data();
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const double* data() const;
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void save_as(double* dest) const;
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reim4_elem get_blk(uint64_t blk) const;
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void set_blk(uint64_t blk, const reim4_elem& value);
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};
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reim_fft64vec operator+(const reim_fft64vec& a, const reim_fft64vec& b);
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reim_fft64vec operator-(const reim_fft64vec& a, const reim_fft64vec& b);
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reim_fft64vec operator*(const reim_fft64vec& a, const reim_fft64vec& b);
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reim_fft64vec operator*(double coeff, const reim_fft64vec& v);
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reim_fft64vec& operator+=(reim_fft64vec& a, const reim_fft64vec& b);
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reim_fft64vec& operator-=(reim_fft64vec& a, const reim_fft64vec& b);
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/** infty distance */
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double infty_dist(const reim_fft64vec& a, const reim_fft64vec& b);
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reim_fft64vec simple_fft64(const znx_i64& polynomial);
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znx_i64 simple_rint_ifft64(const reim_fft64vec& fftvec);
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rnx_f64 naive_ifft64(const reim_fft64vec& fftvec);
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reim_fft64vec simple_fft64(const rnx_f64& polynomial);
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rnx_f64 simple_ifft64(const reim_fft64vec& v);
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#endif // SPQLIOS_FFT64_DFT_H
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