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BACKENDS: BaseBackend detects NEON on aarch64

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This commit is contained in:
Wyatt Radkiewicz 2023-08-02 13:11:43 -07:00 committed by Eugene Sandulenko
parent bdc6d72e0b
commit c3554dd7f0
2 changed files with 19 additions and 12 deletions
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15
backends/base-backend.cpp
View File

@ -64,6 +64,7 @@ void BaseBackend::initBackend() {
if (!_audiocdManager)
_audiocdManager = new DefaultAudioCDManager();
#endif
_cpuFeatures = kCpuNoFeatures;
#if defined(__x86_64__) || defined(__i686__)
uint32 ext_edx1 = 0, ext_ebx7 = 0;
# ifdef __GNUC__
@ -87,17 +88,19 @@ void BaseBackend::initBackend() {
mov ext_ebx7,ebx
}
# endif // __GNUC__ and _MSC_VER
_x86features = (ext_edx1 & (1 << 26)) ? kX86FeatureSSE2 : kX86NoFeatures;
_x86features |= (ext_ebx7 & (1 << 5)) ? kX86FeatureAVX2 : kX86NoFeatures;
#else
_x86features = kX86NotX86;
_cpuFeatures |= (ext_edx1 & (1 << 26)) ? kCpuFeatureSSE2 : kCpuNoFeatures;
_cpuFeatures |= (ext_ebx7 & (1 << 5)) ? kCpuFeatureAVX2 : kCpuNoFeatures;
#endif // __x86_64__ and __i686__
#if defined(__ARM_NEON) || defined(__ARM_NEON__)
_cpuFeatures |= kCpuFeatureNEON;
#endif
OSystem::initBackend();
}
bool BaseBackend::hasFeature(Feature f) {
if (f == kFeatureSSE2) return (_x86features & kX86FeatureSSE2) == kX86FeatureSSE2;
if (f == kFeatureAVX2) return (_x86features & kX86FeatureAVX2) == kX86FeatureAVX2;
if (f == kFeatureSSE2) return _cpuFeatures & kCpuFeatureSSE2;
if (f == kFeatureAVX2) return _cpuFeatures & kCpuFeatureAVX2;
if (f == kFeatureNEON) return _cpuFeatures & kCpuFeatureNEON;
return false;
}

16
backends/base-backend.h
View File

@ -31,11 +31,15 @@
*/
class BaseBackend : public OSystem {
public:
enum x86FeatureFlags {
kX86NoFeatures = 0x00,
kX86NotX86 = 0x00,
kX86FeatureSSE2 = 0x01,
kX86FeatureAVX2 = 0x02,
enum CpuFeatureFlags {
kCpuNoFeatures = 0x00, // Completely detected by BaseBackend
kCpuFeatureSSE2 = 0x01, // Completely detected by BaseBackend
kCpuFeatureAVX2 = 0x02, // Completely detected by BaseBackend
// Detected either by BaseBackend (if platform ONLY supports ARMv8+) or
// platform specific Backends if ARM is optional or not on all versions
// of the platform.
kCpuFeatureNEON = 0x04,
kCpuFeatureAlitvec = 0x08, // Platform specific
};
void initBackend() override;
@ -49,7 +53,7 @@ public:
void fillScreen(const Common::Rect &r, uint32 col) override;
private:
uint32 _x86features;
uint32 _cpuFeatures;
};
class EventsBaseBackend : virtual public BaseBackend, Common::EventSource {