80486DX2-66/gists
1
0
Fork 0
mirror of https://gitlab.com/80486DX2-66/gists synced 2024-11-08 18:02:23 +05:30
Code

cpuid_vendor_id.mod.c: use only tabs for scope indentation

Browse Source
This commit is contained in:
Intel A80486DX2-66 2024-03-08 19:40:54 +03:00
parent ccb438ce00
commit fc829628d9
Signed by: 80486DX2-66
GPG Key ID: 83631EF27054609B
1 changed files with 23 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
c-programming/sys/cpuid_vendor_id.mod.c
View File

@ -39,19 +39,19 @@ typedef unsigned int cpuid_t[4];
// https://stackoverflow.com/questions/1666093/cpuid-implementations-in-c
static inline void native_cpuid(unsigned int function_id, cpuid_t r) {
#ifdef _WIN32
__cpuid((int *) r, (int) function_id);
__cpuid((int *) r, (int) function_id);
#else
r[EAX] = function_id;
r[ECX] = 0;
r[EAX] = function_id;
r[ECX] = 0;
// NOTE:XXX: Register ECX is often an input as well as an output
asm volatile("cpuid"
: "=a" (r[EAX]),
"=b" (r[EBX]),
"=c" (r[ECX]),
"=d" (r[EDX])
: "0" (r[EAX]), "2" (r[ECX])
: "memory");
// NOTE:XXX: Register ECX is often an input as well as an output
asm volatile("cpuid"
: "=a" (r[EAX]),
"=b" (r[EBX]),
"=c" (r[ECX]),
"=d" (r[EDX])
: "0" (r[EAX]), "2" (r[ECX])
: "memory");
#endif
}
@ -62,21 +62,21 @@ static inline void native_cpuid(unsigned int function_id, cpuid_t r) {
* VENDOR_ID_LEN
*/
static inline void cpuid_vendor_id(char vendor[VENDOR_ID_LEN]) {
// Always initialize the result in case of buggy CPU (like ES/QS CPUs)
cpuid_t v;
native_cpuid(0, v);
// Always initialize the result in case of buggy CPU (like ES/QS CPUs)
cpuid_t v;
native_cpuid(0, v);
// https://learn.microsoft.com/en-us/cpp/intrinsics/cpuid-cpuidex
// https://learn.microsoft.com/en-us/cpp/intrinsics/cpuid-cpuidex
// ?view=msvc-170#example
((unsigned int *) vendor)[0] = v[EBX];
((unsigned int *) vendor)[1] = v[EDX];
((unsigned int *) vendor)[2] = v[ECX];
vendor[VENDOR_ID_LEN - 1] = '\0';
((unsigned int *) vendor)[0] = v[EBX];
((unsigned int *) vendor)[1] = v[EDX];
((unsigned int *) vendor)[2] = v[ECX];
vendor[VENDOR_ID_LEN - 1] = '\0';
}
int main(void) {
char vendor_string[VENDOR_ID_LEN];
cpuid_vendor_id(vendor_string);
printf("CPU Vendor ID: '%s'\n", vendor_string);
return 0;
char vendor_string[VENDOR_ID_LEN];
cpuid_vendor_id(vendor_string);
printf("CPU Vendor ID: '%s'\n", vendor_string);
return 0;
}