fix: Detection of HW caps and Num Cpus for FreeBSD(R) and OpenBSD(R)

Signed-off-by: Martin Filla <freebsd@sysctl.cz>

Author: Martinfx

src/common/cpuinfo/CpuInfo.cpp

@@ -443,17 +443,22 @@ CpuInfo CpuInfo::build()
 
     CpuIsaInfo            isainfo;
     std::vector<CpuModel> cpus_model(ncpus);
-    isainfo.neon       = get_hw_capability("hw.optional.neon");
-    isainfo.fp16       = get_hw_capability("hw.optional.neon_fp16");
-    isainfo.dot        = get_hw_capability("hw.optional.arm.FEAT_DotProd");
-    isainfo.bf16       = get_hw_capability("hw.optional.arm.FEAT_BF16");
-    isainfo.i8mm       = get_hw_capability("hw.optional.arm.FEAT_I8MM");
-    isainfo.sme        = get_hw_capability("hw.optional.arm.FEAT_SME");
-    isainfo.sme_f32f32 = get_hw_capability("hw.optional.arm.SME_F32F32");
-    isainfo.sme_b16f32 = get_hw_capability("hw.optional.arm.SME_B16F32");
-    isainfo.sme_f16f32 = get_hw_capability("hw.optional.arm.SME_F16F32");
-    isainfo.sme_i8i32  = get_hw_capability("hw.optional.arm.SME_I8I32");
-    isainfo.sme2       = get_hw_capability("hw.optional.arm.FEAT_SME2");
+
+    unsigned long hwcap = 0, hwcap2 = 0;
+    elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap));
+    elf_aux_info(AT_HWCAP2, &hwcap2, sizeof(hwcap2));
+
+    isainfo.neon       = (hwcap & HWCAP_ASIMD) != 0;
+    isainfo.fp16       = (hwcap & HWCAP_FPHP) != 0;
+    isainfo.dot        = (hwcap & HWCAP_ASIMDDP) != 0;
+    isainfo.bf16       = (hwcap2 & HWCAP2_BF16) != 0;
+    isainfo.i8mm       = (hwcap2 & HWCAP2_I8MM) != 0;
+    isainfo.sme        = (hwcap2 & HWCAP2_SME) != 0;
+    isainfo.sme2       = (hwcap2 & HWCAP2_SME2) != 0;
+    isainfo.sme_f32f32 = (hwcap2 & HWCAP2_SME_F32F32) != 0;
+    isainfo.sme_i8i32  = (hwcap2 & HWCAP2_SME_I8I32) != 0;
+    isainfo.sme_f16f32 = (hwcap2 & HWCAP2_SME_F16F32) != 0;
+    isainfo.sme_b16f32 = (hwcap2 & HWCAP2_SME_B16F32) != 0;
     CpuInfo info(isainfo, cpus_model);
     return info;