interpretor/faust-0.9.47mr3/compiler/generator/compile_sched.cpp

   1 /************************************************************************
   2  ************************************************************************
   3     FAUST compiler
   4         Copyright (C) 2003-2004 GRAME, Centre National de Creation Musicale
   5     ---------------------------------------------------------------------
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  ************************************************************************
  20  ************************************************************************/
  21
  22
  23
  24 #include "compile_sched.hh"
  25 #include "floats.hh"
  26 #include "ppsig.hh"
  27
  28 extern int gVecSize;
  29
  30 void SchedulerCompiler::compileMultiSignal (Tree L)
  31 {
  32     //contextor recursivness(0);
  33     L = prepare(L);     // optimize, share and annotate expression
  34
  35     for (int i = 0; i < fClass->inputs(); i++) {
  36         fClass->addZone3(subst("$1* input$0 = &input[$0][fIndex];", T(i), xfloat()));
  37     }
  38     for (int i = 0; i < fClass->outputs(); i++) {
  39        fClass->addZone3(subst("$1* output$0 = &output[$0][fIndex];", T(i), xfloat()));
  40     }
  41
  42     fClass->addSharedDecl("fullcount");
  43     fClass->addSharedDecl("input");
  44     fClass->addSharedDecl("output");
  45
  46     for (int i = 0; isList(L); L = tl(L), i++) {
  47         Tree sig = hd(L);
  48         fClass->openLoop("count");
  49         fClass->addExecCode(subst("output$0[i] = $2$1;", T(i), CS(sig), xcast()));
  50         fClass->closeLoop(sig);
  51     }
  52
  53     // Build tasks list
  54     fClass->buildTasksList();
  55
  56     generateUserInterfaceTree(prepareUserInterfaceTree(fUIRoot));
  57         generateMacroInterfaceTree("", prepareUserInterfaceTree(fUIRoot));
  58     if (fDescription) {
  59         fDescription->ui(prepareUserInterfaceTree(fUIRoot));
  60     }
  61 }
  62
  63
  64 /**
  65  * Generate the code for a (short) delay line
  66  * @param k the c++ class where the delay line will be placed.
  67  * @param l the loop where the code will be placed.
  68  * @param tname the name of the C++ type (float or int)
  69  * @param dlname the name of the delay line (vector) to be used.
  70  * @param delay the maximum delay
  71  * @param cexp the content of the signal as a C++ expression
  72  */
  73 void  SchedulerCompiler::vectorLoop (const string& tname, const string& vecname, const string& cexp)
  74 {
  75     // -- declare the vector
  76     fClass->addSharedDecl(vecname);
  77
  78     // -- variables moved as class fields...
  79     fClass->addDeclCode(subst("$0 \t$1[$2];", tname, vecname, T(gVecSize)));
  80
  81     // -- compute the new samples
  82     fClass->addExecCode(subst("$0[i] = $1;", vecname, cexp));
  83 }
  84
  85
  86 /**
  87  * Generate the code for a (short) delay line
  88  * @param k the c++ class where the delay line will be placed.
  89  * @param l the loop where the code will be placed.
  90  * @param tname the name of the C++ type (float or int)
  91  * @param dlname the name of the delay line (vector) to be used.
  92  * @param delay the maximum delay
  93  * @param cexp the content of the signal as a C++ expression
  94  */
  95 void  SchedulerCompiler::dlineLoop (const string& tname, const string& dlname, int delay, const string& cexp)
  96 {
  97     if (delay < gMaxCopyDelay) {
  98
  99         // Implementation of a copy based delayline
 100
 101             // create names for temporary and permanent storage
 102             string  buf = subst("$0_tmp", dlname);
 103         string  pmem= subst("$0_perm", dlname);
 104
 105         // constraints delay size to be multiple of 4
 106         delay = (delay+3)&-4;
 107
 108         // allocate permanent storage for delayed samples
 109         string  dsize   = T(delay);
 110         fClass->addDeclCode(subst("$0 \t$1[$2];", tname, pmem, dsize));
 111
 112         // init permanent memory
 113         fClass->addInitCode(subst("for (int i=0; i<$1; i++) $0[i]=0;", pmem, dsize));
 114
 115         // compute method
 116
 117         // -- declare a buffer and a "shifted" vector
 118         fClass->addSharedDecl(buf);
 119
 120         // -- variables moved as class fields...
 121         fClass->addDeclCode(subst("$0 \t$1[$2+$3];", tname, buf, T(gVecSize), dsize));
 122
 123         fClass->addFirstPrivateDecl(dlname);
 124         fClass->addZone2(subst("$0* \t$1 = &$2[$3];", tname, dlname, buf, dsize));
 125
 126         // -- copy the stored samples to the delay line
 127         fClass->addPreCode(subst("for (int i=0; i<$2; i++) $0[i]=$1[i];", buf, pmem, dsize));
 128
 129         // -- compute the new samples
 130         fClass->addExecCode(subst("$0[i] = $1;", dlname, cexp));
 131
 132         // -- copy back to stored samples
 133         fClass->addPostCode(subst("for (int i=0; i<$2; i++) $0[i]=$1[count+i];", pmem, buf, dsize));
 134
 135     } else {
 136
 137         // Implementation of a ring-buffer delayline
 138
 139         // the size should be large enough and aligned on a power of two
 140         delay   = pow2limit(delay + gVecSize);
 141         string  dsize   = T(delay);
 142         string  mask    = T(delay-1);
 143
 144         // create names for temporary and permanent storage
 145         string  idx = subst("$0_idx", dlname);
 146         string  idx_save = subst("$0_idx_save", dlname);
 147
 148         // allocate permanent storage for delayed samples
 149         fClass->addDeclCode(subst("$0 \t$1[$2];", tname, dlname, dsize));
 150         fClass->addDeclCode(subst("int \t$0;", idx));
 151         fClass->addDeclCode(subst("int \t$0;", idx_save));
 152
 153         // init permanent memory
 154         fClass->addInitCode(subst("for (int i=0; i<$1; i++) $0[i]=0;", dlname, dsize));
 155         fClass->addInitCode(subst("$0 = 0;", idx));
 156         fClass->addInitCode(subst("$0 = 0;", idx_save));
 157
 158         // -- update index
 159         fClass->addPreCode(subst("$0 = ($0+$1)&$2;", idx, idx_save, mask));
 160
 161         // -- compute the new samples
 162         fClass->addExecCode(subst("$0[($2+i)&$3] = $1;", dlname, cexp, idx, mask));
 163
 164         // -- save index
 165         fClass->addPostCode(subst("$0 = count;", idx_save));
 166     }
 167 }