WebSVN – tendra.SVN – Diff – /branches/tendra5/src/installers/mips/common/weights.c

+/*
+ * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of The TenDRA Project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific, prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
+ * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $Id$
+ */
 /*
     		 Crown Copyright (c) 1997
     This TenDRA(r) Computer Program is subject to Copyright
     owned by the United Kingdom Secretary of State for Defence
     (DERA).  It is made available to Recipients with a
     royalty-free licence for its use, reproduction, transfer
     to other parties and amendment for any purpose not excluding
     product development provided that any such use et cetera
     shall be deemed to be acceptance of the following conditions:-
         (1) Its Recipients shall ensure that this Notice is
         reproduced upon any copies or amended versions of it;
         (2) Any amended version of it shall be clearly marked to
         show both the nature of and the organisation responsible
         (4) DERA gives no warranty or assurance as to its
         quality or suitability for any purpose and DERA accepts
         no liability whatsoever in relation to any use to which
         it may be put.
 */
 /**********************************************************************
 $Author: release $
 $Date: 1998/01/17 15:56:07 $
 $Revision: 1.1.1.1 $
 $Log: weights.c,v $
 };
 /* NB scale, throughout,  should be a float but mips cc V2.10 compiles calls and
 		proc body inconsistently !! */
-weights weightsv PROTO_S ((double scale, exp e));
+weights weightsv(double scale, exp e);
 weights add_weights
-    PROTO_N ( (w1,w2) )
-    PROTO_T ( weights * w1 X weights * w2 )
+(weights * w1, weights * w2)
+{
 				/* sum of weights*/
   weights r;
   long  i;
   for (i = 0; i < wfixno; ++i) {
-      (r.fix)[i] = (w1->fix)[i]+(w2->fix)[i];
+     (r.fix)[i] = (w1->fix)[i] + (w2->fix)[i];
   };
   for (i = 0; i < wfloatno; ++i) {
-      (r.floating)[i] = (w1->floating)[i]+(w2->floating)[i];
+     (r.floating)[i] = (w1->floating)[i] + (w2->floating)[i];
   };
-  return (r);
+  return(r);
+}
 wp max_weights
-    PROTO_N ( (loc, ws, fix) )
-    PROTO_T ( double loc X weights * ws X bool fix )
+(double loc, weights * ws, bool fix)
+{
 				/* loc is the usage count of a tag, ws is
 				   the weights computed for the scope of
 				   the tag and fix distinguishes between
 				   fix and float. This computes the
   long  i;
   float *w = (ws -> fix);
   /*  w[i] = greatest usage of (i+1) inner fixed tags  */
   wp res;
-  float *pw = &(((res.wp_weights).fix)[0]);
+  float *pw = & (((res.wp_weights).fix)[0]);
   if (fix) {
     for (i = 0; i < wfixno; ++i) {
       if (i == 0) {
 	if (loc > w[i]) {
 	  /* this tag has higher usage than any inner one ... */
 	  pw[i] = loc;
 	  bk = i;		/* ... so it's regged in pref to others */
 	}
 	else
 	  pw[i] = w[i];
+      }
       else {
 	if ((loc + w[i - 1]) > w[i]) {
 	  /* this tag and i inner ones have higher usage than any other
 	     (i+1) inner ones ... */
   res.fix_break = bk;
   bk = wfloatno + 1;
   w = (ws -> floating);
-  pw = &(((res.wp_weights).floating)[0]);
+  pw = & (((res.wp_weights).floating)[0]);
   if (!fix) {			/* same algorithm for float regs as fixed
 				   regs */
     for (i = 0; i < wfloatno; ++i) {
       if (i == 0) {
 	if (loc > w[i]) {
   res.float_break = bk;
   return res;
+}
 weights mult_weights
-    PROTO_N ( (m, ws) )
-    PROTO_T ( double m X weights * ws )
+(double m, weights * ws)
+{
 				/* multiply weights by scalar - non
 				   overflowing */
   weights res;
-  float *r = &(res.fix)[0];
+  float *r = & (res.fix)[0];
   float *w = ws -> fix;
   long  i;
   for (i = 0; i < wfixno; ++i) {
-      r[i] = w[i] * m;
+      r[i] = w[i]* m;
   };
-  r = &(res.floating)[0];
+  r = & (res.floating)[0];
   w = ws -> floating;
   for (i = 0; i < wfloatno; ++i) {
-      r[i] = w[i] * m;
+      r[i] = w[i]* m;
   };
-  return (res);
+  return(res);
+}
 weights add_wlist
-    PROTO_N ( (scale, re) )
-    PROTO_T ( double scale X exp re )
+(double scale, exp re)
 {/* sum of  weights of list re */
   weights w, w1;
   exp r = re;
   if (r == nilexp) {
     return zeroweights;
+  }
   else
-    if (last (r)) {
+    if (last(r)) {
-      return (weightsv (scale, r));
+      return(weightsv(scale, r));
+    }
     else {
-      w = weightsv (scale, r);
+      w = weightsv(scale, r);
       do {
-	r = bro (r);
+	r = bro(r);
-	w1 = weightsv (scale, r);
+	w1 = weightsv(scale, r);
-	w = add_weights (&w, &w1);
+	w = add_weights(&w, &w1);
-      } while (!last (r));
+      } while (!last(r));
       return w;
+    }
+}
 finally determines the actual choice of s reg and recodes the number
 field of an ident.
 ******************************************************************/
 weights weightsv
-    PROTO_N ( (scale, e) )
-    PROTO_T ( double scale X exp e )
+(double scale, exp e)
+{
  unsigned char  n;
 tailrecurse:
-  n = name (e);
+  n = name(e);
   switch (n) {
     case name_tag:
+      {
-	exp s = son (e);
+	exp s = son(e);
-	if (name (s) == ident_tag && !isglob (s)) {
+	if (name(s) == ident_tag && !isglob(s)) {
-	  if (is_floating(name(sh(e))) && name(sh(e)) != shrealhd) {
+	  if (is_floating(name(sh(e))) && name(sh(e))!= shrealhd) {
 	  	fno(s) += scale*2.0;
-	  } else fno (s) += scale;
+	  } else fno(s) += scale;
+	}
 	/* usage of tag stored in number of son of load_name (decl) */
 	return zeroweights;
       };
     case ident_tag:
+      {
-	if (son (e) != nilexp) {
+	if (son(e)!= nilexp) {
 	  weights wdef;
 	  weights wbody;
 	  long  noe = no (e) /* set by scan */ ;
-	  if (name (son (e)) == clear_tag || props (e) & defer_bit) {
+	  if (name(son(e)) == clear_tag || props(e) & defer_bit) {
 	    wdef = zeroweights;
-	    fno(e)= 0.0;
+	    fno(e) = 0.0;
+	  }
 	  else {
 	    /* maybe needs a store to initialise */
-	    if (is_floating(name(sh(son(e)))) && name(sh(son(e))) != shrealhd) {
+	    if (is_floating(name(sh(son(e)))) && name(sh(son(e)))!= shrealhd) {
 	  		fno(e) = scale*2.0;
-	    } else fno (e) = scale;
+	    } else fno(e) = scale;
-	    wdef = weightsv (scale, son (e));
+	    wdef = weightsv(scale, son(e));
+	  }
 	  /* weights for initialisation of dec */
-	  wbody = weightsv (scale, bro (son (e)));
+	  wbody = weightsv(scale, bro(son(e)));
 	  /* weights of body of scan */
 	  if (props (e) & defer_bit) {/* declaration will be treated
 				   transparently in code production */
-	    exp t = son (e);
+	    exp t = son(e);
 	    exp s;
-	    if (name (t) == val_tag || name(t) == real_tag) {
+	    if (name(t) == val_tag || name(t) == real_tag) {
 	      return wbody;
+	    }
-	    while (name (t) != name_tag) {
+	    while (name(t)!= name_tag) {
-	      t = son (t);
+	      t = son(t);
+	    }
-	    s = son (t);
+	    s = son(t);
-	    if (name (s) == ident_tag && !isglob (t)) {
+	    if (name(s) == ident_tag && !isglob(t)) {
-	      fno (s) += fno (e);
+	      fno(s) += fno(e);
+	    }
 	    /* usage of tag stored in number of son of load_name (decl) */
 	    return wbody;
 	  }			/* end deferred */
-	  if ((props (e) & inreg_bits) == 0 && fixregable (e)) {
+	  if ((props(e) & inreg_bits) == 0 && fixregable(e)) {
 	    wp p;
-	    p = max_weights (fno (e) - 2.0*scale , &wbody, 1);
+	    p = max_weights(fno(e) - 2.0*scale , &wbody, 1);
 	    /* usage decreased by 2 because of dump and restore of s-reg
 	    */
-	    no (e) = p.fix_break;
+	    no(e) = p.fix_break;
-	    return (add_weights (&wdef, &p.wp_weights));
+	    return(add_weights(&wdef, &p.wp_weights));
+	  }
 	  else
-	    if ((props (e) & infreg_bits) == 0 && floatregable (e)) {
+	    if ((props(e) & infreg_bits) == 0 && floatregable(e)) {
 	      wp p;
-	      p = max_weights (fno (e) - 4 * scale, &wbody, 0);
+	      p = max_weights(fno(e) - 4 * scale, &wbody, 0);
 	      /* usage decreased by 4 because of dump and restore of
 	         double s-reg */
-	      no (e) = p.float_break;
+	      no(e) = p.float_break;
-	      return (add_weights (&wdef, &p.wp_weights));
+	      return(add_weights(&wdef, &p.wp_weights));
+	    }
 	    else {
 	      no (e) = noe /* restore to value given by scan */ ;
-	      return add_weights (&wdef, &wbody);
+	      return add_weights(&wdef, &wbody);
+	    }
+	}
 	else
 	  return zeroweights;
       };
     case rep_tag: {
-	e = bro (son (e));
+	e = bro(son(e));
 	goto tailrecurse;
+      }
     case case_tag: {
-	e = son (e);
+	e = son(e);
 	goto tailrecurse;
       };
     case labst_tag:
       { scale = fno(e);
-	e = bro (son (e));
+	e = bro(son(e));
 	goto tailrecurse;
+      }
     case val_tag:{
     case seq_tag:  {
 	exp l = son(son(e));
 	exp r = bro(son(e));
 	weights w, w1;
         w = weightsv(scale, l);
-	while(!last(l)) {
+	while (!last(l)) {
 		l = bro(l);
 		w1 = weightsv(scale, l);
 		w = add_weights(&w, &w1);
+	}
 	w1 = weightsv(scale, r);
         return w;
+   }
     default: {
-	if (son (e) == nilexp || n == env_offset_tag
+	if (son(e) == nilexp || n == env_offset_tag
-		|| n == general_env_offset_tag ) {
+		|| n == general_env_offset_tag) {
 	  return zeroweights;
+	}
-	if (last (son (e))) {
+	if (last(son(e))) {
-	  e = son (e);
+	  e = son(e);
 	  goto tailrecurse;
+	}
-	return (add_wlist (scale, son (e)));
+	return(add_wlist(scale, son(e)));
+      }
+  }
+}

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(root)/branches/tendra5/src/installers/mips/common/weights.c – Rev 5 → 6