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Fix l-value indexing of memories and vectors so that

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an unknown (x) index causes so cell to be addresses.

 Fix tangling of label identifiers in the fork-join
 code generator.
This commit is contained in:
steve
2002-08-27 05:39:57 +00:00
parent bd9e66d333
commit aa390f2a91
5 changed files with 115 additions and 26 deletions
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vvp/opcodes.txt
+11 -2
View File
@@ -1,7 +1,7 @@
/*
* Copyright (c) 2001 Stephen Williams ([email protected])
*
* $Id: opcodes.txt,v 1.37 2002/08/22 03:38:40 steve Exp $
* $Id: opcodes.txt,v 1.38 2002/08/27 05:39:57 steve Exp $
*/
@@ -234,7 +234,16 @@ thread bit space, and <wid> is the width of the vector.
The function converts the 4-value bits into a binary number, without
sign extension. If any of the bits of the vector is x or z, then the
index register gets the value (-1).
index register gets the value 0.
The function also writes into bit 4 a 1 if any of the bits of the
input vector are x or z. This is a flag that the 0 value written into
the index register is really the result of calculating from unknown
bits.
4: unknown value
5: (reserved)
6: (reserved)
* %ix/load <idx>, <value>
vvp/vthread.cc
+15 -3
View File
@@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: vthread.cc,v 1.81 2002/08/22 03:38:40 steve Exp $"
#ident "$Id: vthread.cc,v 1.82 2002/08/27 05:39:57 steve Exp $"
#endif
# include "vthread.h"
@@ -1260,21 +1260,26 @@ bool of_IX_LOAD(vthread_t thr, vvp_code_t cp)
* vector and <wid> is the width in bits.
*
* Index registers only hold binary values, so if any of the
* bits of the vector are x or z, then set the value to 0
* and give up.
* bits of the vector are x or z, then set the value to 0,
* set bit[4] to 1, and give up.
*/
bool of_IX_GET(vthread_t thr, vvp_code_t cp)
{
unsigned long v = 0;
bool unknown_flag = false;
for (unsigned i = 0; i<cp->number; i++) {
unsigned char vv = thr_get_bit(thr, cp->bit_idx[1] + i);
if (vv&2) {
v = 0UL;
unknown_flag = true;
break;
}
v |= vv << i;
}
thr->index[cp->bit_idx[0] & 3] = v;
/* Set bit 4 as a flag if the input is unknown. */
thr_put_bit(thr, 4, unknown_flag? 1 : 0);
return true;
}
@@ -2243,6 +2248,13 @@ bool of_CALL_UFUNC(vthread_t thr, vvp_code_t cp)
/*
* $Log: vthread.cc,v $
* Revision 1.82 2002/08/27 05:39:57 steve
* Fix l-value indexing of memories and vectors so that
* an unknown (x) index causes so cell to be addresses.
*
* Fix tangling of label identifiers in the fork-join
* code generator.
*
* Revision 1.81 2002/08/22 03:38:40 steve
* Fix behavioral eval of x?a:b expressions.
*