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Line 1... |
//
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//
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// Filename: fft_tb.cpp
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// Filename: fft_tb.cpp
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//
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//
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// Project: A Doubletime Pipelined FFT
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// Project: A Doubletime Pipelined FFT
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//
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//
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// Purpose: A test-bench for the mail program, fftmain.v, of the double
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// Purpose: A test-bench for the main program, fftmain.v, of the double
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// clocked FFT. This file may be run autonomously (when
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// clocked FFT. This file may be run autonomously (when
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// fully functional). If so, the last line output will either
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// fully functional). If so, the last line output will either
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// read "SUCCESS" on success, or some other failure message
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// read "SUCCESS" on success, or some other failure message
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// otherwise.
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// otherwise.
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//
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//
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| Line 135... |
Line 135... |
dp = vout;
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dp = vout;
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for(int i=0; i<FFTLEN; i++) {
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for(int i=0; i<FFTLEN; i++) {
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long tv = m_data[i];
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long tv = m_data[i];
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printf("OUT[%4d = %4x] = ", i, i);
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printf("OUT[%4d = %4x] = ", i, i);
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printf("%16lx = ", tv);
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printf("%12lx = ", tv);
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*dp = twos_complement(tv >> OWIDTH, OWIDTH);
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*dp = twos_complement(tv >> OWIDTH, OWIDTH);
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printf("%12.1f + ", *dp);
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printf("%10.1f + ", *dp);
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osq += (*dp) * (*dp); dp++;
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osq += (*dp) * (*dp); dp++;
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*dp = twos_complement(tv, OWIDTH);
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*dp = twos_complement(tv, OWIDTH);
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printf("%12.1f j", *dp);
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printf("%10.1f j", *dp);
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osq += (*dp) * (*dp); dp++;
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osq += (*dp) * (*dp); dp++;
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printf(" <-> %12.1f %12.1f\n", m_fft_buf[2*i], m_fft_buf[2*i+1]);
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printf(" <-> %12.1f %12.1f\n", m_fft_buf[2*i], m_fft_buf[2*i+1]);
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}
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}
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| Line 270... |
Line 270... |
}
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}
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double rdata(int addr) {
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double rdata(int addr) {
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long ivl = m_data[addr & (FFTLEN-1)];
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long ivl = m_data[addr & (FFTLEN-1)];
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ivl = ivl >> 17;
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ivl = twos_complement(ivl >> OWIDTH, OWIDTH);
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ivl &= ((1<<OWIDTH)-1);
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if (1 & (ivl>>(OWIDTH-1)))
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ivl |= (-1l << OWIDTH);
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return (double)ivl;
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return (double)ivl;
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}
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}
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double idata(int addr) {
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double idata(int addr) {
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long ivl = m_data[addr & (FFTLEN-1)];
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long ivl = m_data[addr & (FFTLEN-1)];
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ivl = ivl;
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ivl = twos_complement(ivl, OWIDTH);
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ivl &= ((1<<OWIDTH)-1);
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if (1 & (ivl>>(OWIDTH-1)))
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ivl |= (-1l << OWIDTH);
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return (double)ivl;
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return (double)ivl;
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}
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}
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void dump(FILE *fp) {
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void dump(FILE *fp) {
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m_dumpfp = fp;
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m_dumpfp = fp;
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