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target-i386: Simplify listflags() function 

listflags() had lots of unnecessary complexity. Instead of printing to a
buffer that will be immediately printed, simply call the printing
function directly. Also, remove the fbits and flags arguments that were
always set to the same value. Also, there's no need to list the flags in
reverse order.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Eduardo Habkost 2015-02-03 15:48:55 -02:00
parent 3d30395f7f
commit a3c2ca7d29
1 changed files with 12 additions and 26 deletions
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38
target-i386/cpu.c
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@ -1911,34 +1911,19 @@ static void x86_cpu_parse_featurestr(CPUState *cs, char *features,
}
}
/* generate a composite string into buf of all cpuid names in featureset
* selected by fbits. indicate truncation at bufsize in the event of overflow.
* if flags, suppress names undefined in featureset.
/* Print all cpuid feature names in featureset
*/
static void listflags(char *buf, int bufsize, uint32_t fbits,
const char **featureset, uint32_t flags)
static void listflags(FILE *f, fprintf_function print, const char **featureset)
{
const char **p = &featureset[31];
char *q, *b, bit;
int nc;
int bit;
bool first = true;
b = 4 <= bufsize ? buf + (bufsize -= 3) - 1 : NULL;
*buf = '\0';
for (q = buf, bit = 31; fbits && bufsize; --p, fbits &= ~(1 << bit), --bit)
if (fbits & 1 << bit && (*p || !flags)) {
if (*p)
nc = snprintf(q, bufsize, "%s%s", q == buf ? "" : " ", *p);
else
nc = snprintf(q, bufsize, "%s[%d]", q == buf ? "" : " ", bit);
if (bufsize <= nc) {
if (b) {
memcpy(b, "...", sizeof("..."));
}
return;
}
q += nc;
bufsize -= nc;
for (bit = 0; bit < 32; bit++) {
if (featureset[bit]) {
print(f, "%s%s", first ? "" : " ", featureset[bit]);
first = false;
}
}
}
/* generate CPU information. */
@ -1963,8 +1948,9 @@ void x86_cpu_list(FILE *f, fprintf_function cpu_fprintf)
for (i = 0; i < ARRAY_SIZE(feature_word_info); i++) {
FeatureWordInfo *fw = &feature_word_info[i];
listflags(buf, sizeof(buf), (uint32_t)~0, fw->feat_names, 1);
(*cpu_fprintf)(f, " %s\n", buf);
(*cpu_fprintf)(f, " ");
listflags(f, cpu_fprintf, fw->feat_names);
(*cpu_fprintf)(f, "\n");
}
}