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neon: add dotprod dispatch implementation

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* read vector at runtime
     * add enum
This commit is contained in:
Tomoaki Teshima
2022-07-20 19:25:39 +09:00
parent 2a82467a6f
commit b3269b08a1
8 changed files with 106 additions and 38 deletions
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modules/core/src/system.cpp
+19
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@@ -411,6 +411,7 @@ struct HWFeatures
g_hwFeatureNames[CPU_AVX_5124FMAPS] = "AVX5124FMAPS";
g_hwFeatureNames[CPU_NEON] = "NEON";
g_hwFeatureNames[CPU_NEON_DOTPROD] = "NEON_DOTPROD";
g_hwFeatureNames[CPU_VSX] = "VSX";
g_hwFeatureNames[CPU_VSX3] = "VSX3";
@@ -555,6 +556,24 @@ struct HWFeatures
#ifdef __aarch64__
have[CV_CPU_NEON] = true;
have[CV_CPU_FP16] = true;
int cpufile = open("/proc/self/auxv", O_RDONLY);
if (cpufile >= 0)
{
Elf64_auxv_t auxv;
const size_t size_auxv_t = sizeof(auxv);
while ((size_t)read(cpufile, &auxv, size_auxv_t) == size_auxv_t)
{
if (auxv.a_type == AT_HWCAP)
{
have[CV_CPU_NEON_DOTPROD] = (auxv.a_un.a_val & (1 << 20)) != 0;
break;
}
}
close(cpufile);
}
#elif defined __arm__ && defined __ANDROID__
#if defined HAVE_CPUFEATURES
CV_LOG_INFO(NULL, "calling android_getCpuFeatures() ...");