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authorWunkolo <Wunkolo@gmail.com>2022-02-24 04:41:27 +0100
committerWunkolo <Wunkolo@gmail.com>2022-03-09 22:57:47 +0100
commitec5f3351b69b6427d1e411fcc849e98705a044c3 (patch)
treec137667f61e31588ef1b07298a7e2c8a0d1a49be /src/common/x64/cpu_detect.cpp
parentcpu_detect: Update array-types to `span` and `array` (diff)
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Diffstat (limited to 'src/common/x64/cpu_detect.cpp')
-rw-r--r--src/common/x64/cpu_detect.cpp37
1 files changed, 22 insertions, 15 deletions
diff --git a/src/common/x64/cpu_detect.cpp b/src/common/x64/cpu_detect.cpp
index 23adc5c75..65369bfbe 100644
--- a/src/common/x64/cpu_detect.cpp
+++ b/src/common/x64/cpu_detect.cpp
@@ -3,7 +3,9 @@
#include <array>
#include <cstring>
+#include <iterator>
#include <span>
+#include <string_view>
#include "common/bit_util.h"
#include "common/common_types.h"
#include "common/x64/cpu_detect.h"
@@ -47,6 +49,17 @@ static inline u64 _xgetbv(u32 index) {
namespace Common {
+CPUCaps::Manufacturer CPUCaps::ParseManufacturer(std::string_view brand_string) {
+ if (brand_string == "GenuineIntel") {
+ return Manufacturer::Intel;
+ } else if (brand_string == "AuthenticAMD") {
+ return Manufacturer::AMD;
+ } else if (brand_string == "HygonGenuine") {
+ return Manufacturer::Hygon;
+ }
+ return Manufacturer::Unknown;
+}
+
// Detects the various CPU features
static CPUCaps Detect() {
CPUCaps caps = {};
@@ -55,30 +68,24 @@ static CPUCaps Detect() {
// yuzu at all anyway
std::array<u32, 4> cpu_id;
- std::memset(caps.brand_string, 0, sizeof(caps.brand_string));
- // Detect CPU's CPUID capabilities and grab CPU string
+ // Detect CPU's CPUID capabilities and grab manufacturer string
__cpuid(cpu_id, 0x00000000);
- u32 max_std_fn = cpu_id[0]; // EAX
+ const u32 max_std_fn = cpu_id[0]; // EAX
+ std::memset(caps.brand_string, 0, std::size(caps.brand_string));
std::memcpy(&caps.brand_string[0], &cpu_id[1], sizeof(u32));
std::memcpy(&caps.brand_string[4], &cpu_id[3], sizeof(u32));
std::memcpy(&caps.brand_string[8], &cpu_id[2], sizeof(u32));
- if (cpu_id[1] == 0x756e6547 && cpu_id[2] == 0x6c65746e && cpu_id[3] == 0x49656e69)
- caps.manufacturer = Manufacturer::Intel;
- else if (cpu_id[1] == 0x68747541 && cpu_id[2] == 0x444d4163 && cpu_id[3] == 0x69746e65)
- caps.manufacturer = Manufacturer::AMD;
- else if (cpu_id[1] == 0x6f677948 && cpu_id[2] == 0x656e6975 && cpu_id[3] == 0x6e65476e)
- caps.manufacturer = Manufacturer::Hygon;
- else
- caps.manufacturer = Manufacturer::Unknown;
- __cpuid(cpu_id, 0x80000000);
+ caps.manufacturer = CPUCaps::ParseManufacturer(caps.brand_string);
+
+ // Set reasonable default cpu string even if brand string not available
+ std::strncpy(caps.cpu_string, caps.brand_string, std::size(caps.brand_string));
- u32 max_ex_fn = cpu_id[0];
+ __cpuid(cpu_id, 0x80000000);
- // Set reasonable default brand string even if brand string not available
- std::strcpy(caps.cpu_string, caps.brand_string);
+ const u32 max_ex_fn = cpu_id[0];
// Detect family and other miscellaneous features
if (max_std_fn >= 1) {