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fhandler_proc.cc(format_proc_cpuinfo): fix cpuid level count 

Fix cpuid level count as number of non-zero leafs excluding sub-leafs.
This commit is contained in:
Brian Inglis 2019-10-07 10:22:59 -06:00 committed by Ken Brown
parent 148a282868
commit 6234028f99
1 changed files with 18 additions and 1 deletions
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19
winsup/cygwin/fhandler_proc.cc
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@ -927,13 +927,30 @@ format_proc_cpuinfo (void *, char *&destbuf)
}
/* level is number of non-zero leafs exc. sub-leafs */
int level = maxf + 1 + (maxe & 0x7fffffff) + 1;
for (uint32_t l = maxe; 0x80000001 < l; --l)
{
uint32_t a, b, c, d;
cpuid (&a, &b, &c, &d, l);
if (!(a | b | c | d)) --level;
}
for (uint32_t l = maxf; 1 < l; --l)
{
uint32_t a, b, c, d;
cpuid (&a, &b, &c, &d, l);
if (!(a | b | c | d)) --level;
}
bufptr += __small_sprintf (bufptr, "fpu\t\t: %s\n"
"fpu_exception\t: %s\n"
"cpuid level\t: %d\n"
"wp\t\t: yes\n",
(features1 & (1 << 0)) ? "yes" : "no",
(features1 & (1 << 0)) ? "yes" : "no",
maxf);
level);
print ("flags\t\t:");
if (features1 & (1 << 0))
print (" fpu");