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Generalized sim_debug_u16 into sim_debug_bits and added support to display bit fields of variable size as well as bit states.

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This commit is contained in:
Mark Pizzolato
2012-12-04 09:32:40 -08:00
parent c90bdf935a
commit bcf0e8b19c
4 changed files with 79 additions and 24 deletions
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44
scp.c
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@@ -5860,19 +5860,49 @@ if (!debug_unterm) {
}
/* Prints state of a register: bit translation + state (0,1,_,^)
indicating the state and transition of the bit. States:
indicating the state and transition of the bit and bitfields. States:
0=steady(0->0), 1=steady(1->1), _=falling(1->0), ^=rising(0->1) */
void sim_debug_u16(uint32 dbits, DEVICE* dptr, const char* const* bitdefs,
uint16 before, uint16 after, int terminate)
void sim_debug_bits(uint32 dbits, DEVICE* dptr, BITFIELD* bitdefs,
uint32 before, uint32 after, int terminate)
{
if (sim_deb && (dptr->dctrl & dbits)) {
int32 i;
int32 i, fields, offset;
uint32 value, beforevalue, mask;
for (fields=offset=0; bitdefs[fields].name; ++fields) {
if (bitdefs[fields].offset == -1) /* fixup uninitialized offsets */
bitdefs[fields].offset = offset;
offset += bitdefs[fields].width;
}
sim_debug_prefix(dbits, dptr); /* print prefix if required */
for (i = 15; i >= 0; i--) { /* print xlation, transition */
int off = ((after >> i) & 1) + (((before ^ after) >> i) & 1) * 2;
fprintf(sim_deb, "%s%c ", bitdefs[i], debug_bstates[off]);
for (i = fields-1; i >= 0; i--) { /* print xlation, transition */
if (bitdefs[i].name[0] == '\0')
continue;
if ((bitdefs[i].width == 1) && (bitdefs[i].valuenames == NULL)) {
int off = ((after >> bitdefs[i].offset) & 1) + (((before ^ after) >> i) & 1) * 2;
fprintf(sim_deb, "%s%c ", bitdefs[i].name, debug_bstates[off]);
}
else {
char *delta = "";
mask = 0xFFFFFFFF >> (32-bitdefs[i].width);
value = ((after >> bitdefs[i].offset) & mask) + (((before ^ after) >> bitdefs[i].offset) & mask) * 2;
beforevalue = ((before >> bitdefs[i].offset) & mask);
if (value < beforevalue)
delta = "_";
if (value > beforevalue)
delta = "^";
if (bitdefs[i].valuenames)
fprintf(sim_deb, "%s=%s%s ", bitdefs[i].name, delta, bitdefs[i].valuenames[value]);
else
if (bitdefs[i].format) {
fprintf(sim_deb, "%s=%s", bitdefs[i].name, delta, value);
fprintf(sim_deb, bitdefs[i].format, value);
}
else
fprintf(sim_deb, "%s=%s0x%X ", bitdefs[i].name, delta, value);
}
}
if (terminate)
fprintf(sim_deb, "\r\n");