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Support negative index for %assign/av opcodes. 

If the array index is negative these opcodes need to just return.
(cherry picked from commit 9d765820bf)
This commit is contained in:
Cary R 2009-09-02 19:44:41 -07:00 committed by Stephen Williams
parent df177e9e14
commit f34485d415
1 changed files with 9 additions and 3 deletions
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12
vvp/vthread.cc
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@ -824,10 +824,12 @@ bool of_ASSIGN_AV(vthread_t thr, vvp_code_t cp)
{ {
unsigned wid = thr->words[0].w_int; unsigned wid = thr->words[0].w_int;
long off = thr->words[1].w_int; long off = thr->words[1].w_int;
unsigned adr = thr->words[3].w_int; long adr = thr->words[3].w_int;
unsigned delay = cp->bit_idx[0]; unsigned delay = cp->bit_idx[0];
unsigned bit = cp->bit_idx[1]; unsigned bit = cp->bit_idx[1];
if (adr < 0) return true;
long vwidth = get_array_word_size(cp->array); long vwidth = get_array_word_size(cp->array);
// We fell off the MSB end. // We fell off the MSB end.
if (off >= vwidth) return true; if (off >= vwidth) return true;
@ -861,10 +863,12 @@ bool of_ASSIGN_AVD(vthread_t thr, vvp_code_t cp)
{ {
unsigned wid = thr->words[0].w_int; unsigned wid = thr->words[0].w_int;
long off = thr->words[1].w_int; long off = thr->words[1].w_int;
unsigned adr = thr->words[3].w_int; long adr = thr->words[3].w_int;
vvp_time64_t delay = thr->words[cp->bit_idx[0]].w_int; vvp_time64_t delay = thr->words[cp->bit_idx[0]].w_int;
unsigned bit = cp->bit_idx[1]; unsigned bit = cp->bit_idx[1];
if (adr < 0) return true;
long vwidth = get_array_word_size(cp->array); long vwidth = get_array_word_size(cp->array);
// We fell off the MSB end. // We fell off the MSB end.
if (off >= vwidth) return true; if (off >= vwidth) return true;
@ -892,9 +896,11 @@ bool of_ASSIGN_AVE(vthread_t thr, vvp_code_t cp)
{ {
unsigned wid = thr->words[0].w_int; unsigned wid = thr->words[0].w_int;
long off = thr->words[1].w_int; long off = thr->words[1].w_int;
unsigned adr = thr->words[3].w_int; long adr = thr->words[3].w_int;
unsigned bit = cp->bit_idx[0]; unsigned bit = cp->bit_idx[0];
if (adr < 0) return true;
long vwidth = get_array_word_size(cp->array); long vwidth = get_array_word_size(cp->array);
// We fell off the MSB end. // We fell off the MSB end.
if (off >= vwidth) return true; if (off >= vwidth) return true;