xfnw/plan9fox
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

aux/cpuid: decode family and model bitfields

Browse source
This commit is contained in:
aiju 2017-06-12 19:36:52 +00:00
parent 744a4a8270
commit dae0f4d28d
1 changed files with 8 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

8
sys/src/cmd/aux/cpuid.c
View file

@ -71,6 +71,7 @@ void
func1(ulong)
{
Res r;
int family, model;
static char *bitsdx[32] = {
[0] "fpu", "vme", "de", "pse",
[4] "tsc", "msr", "pae", "mce",
@ -94,6 +95,13 @@ func1(ulong)
r = cpuid(1, 0);
Bprint(out, "procmodel %.8ulx / %.8ulx\n", r.ax, r.bx);
family = r.ax >> 8 & 0xf;
model = r.ax >> 8 & 0xf;
if(family == 15)
family += r.ax >> 20 & 0xff;
if(family == 6 || family == 15)
model += r.ax >> 12 & 0xf0;
Bprint(out, "typefammod %.1x %.2x %.3x %.1x\n", (int)(r.ax >> 12 & 3), family, model, (int)(r.ax & 0xf));
printbits("features", r.dx, bitsdx);
printbits("features", r.cx, bitscx);
}