Thanks! Aaron
On Sunday, April 24, 2016, Stéphane Letz <l...@grame.fr> wrote:
> Fixed on GIT for 'float' and ‘double'. Note the ‘quad’ handling is not yet
> fully implemented as deferent places in the compiler.
>
> Stéphane
>
>
> > Le 24 avr. 2016 à 03:43, Aaron Heller <hel...@ai.sri.com <javascript:;>>
> a écrit :
> >
> > Looking over the C++ that Faust generates, it seems that constants are
> always single precision, regardless of the translation options. I
> appreciate that the input and output samples are aways going to be single
> precision, but there are times when it would be useful to have greater
> precision internally, say the coefficients in a biquad IIR filter when the
> cutoff frequency is much lower than the sample rate.
> >
> > To illustrate, the program:
> >
> > process = _: *(1/9) :_;
> >
> > with no options compiles to:
> >
> > output0[i] = FAUSTFLOAT((0.111111f * float(input0[i])));
> >
> > with -double compiles to:
> >
> > output0[i] = FAUSTFLOAT((0.111111 * double(input0[i])));
> >
> > and -quad
> >
> > output0[i] = FAUSTFLOAT((0.111111 * quad(input0[i])));
> >
> > so the samples are getting converted, but the representation of 1/9
> remains single precision. I'd expect to see a lot more digits in double
> and quad. I'm using this version of Faust currently:
> >
> > bash-3.2$ faust -v
> > FAUST : DSP to C, C++, JAVA, JavaScript/ASMJavaScript, WebAssembly, LLVM
> IR version 2.0.a42
> > Copyright (C) 2002-2016, GRAME - Centre National de Creation Musicale.
> All rights reserved.
> >
> >
> > Thanks for any feedback or advice...
> >
> > Aaron Heller (hel...@ai.sri.com <javascript:;>)
> > Menlo Park, CA US
> >
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