Skip to content

fix: Detection of HW caps and Num Cpus for FreeBSD(R) and OpenBSD(R) #1269

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Martinfx wants to merge 2 commits into
base: main
Choose a base branch
from
+34 −5
Open

fix: Detection of HW caps and Num Cpus for FreeBSD(R) and OpenBSD(R) #1269

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
bdadbf6
fix: Detection of HW caps and Num Cpus for FreeBSD(R) and OpenBSD(R)
Martinfx Mar 16, 2026
9483818
fix: Detection of HW caps and Num Cpus for FreeBSD(R) and OpenBSD(R)
Martinfx Apr 5, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
39 changes: 34 additions & 5 deletions src/common/cpuinfo/CpuInfo.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -57,9 +57,14 @@
!defined(__QNX__) && (defined(__arm__) || defined(__aarch64__))
#include <asm/hwcap.h> /* Get HWCAP bits from asm/hwcap.h */
#include <sys/auxv.h>
#elif (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__APPLE__)) && defined(__aarch64__)
#elif (defined(__APPLE__)) && defined(__aarch64__)
#include <sys/sysctl.h>
#include <sys/types.h>
#elif (defined(__OpenBSD__) || defined(__FreeBSD__))
Copy link
Copy Markdown
Contributor

@gunes-arm gunes-arm Apr 7, 2026 •
edited
Loading

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

(defined(__OpenBSD__) || defined(__FreeBSD__)) && defined(__aarch64__)

#include <sys/auxv.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <unistd.h>
#endif /* defined(__APPLE__) && defined(__aarch64__)) */
Copy link
Copy Markdown
Contributor

@gunes-arm gunes-arm Apr 7, 2026 •
edited
Loading

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

/* #elif (defined(OpenBSD) || defined(FreeBSD)) && defined(aarch64) */

#endif /* !defined(BARE_METAL) && !defined(__APPLE__) && !defined(__OpenBSD__) && !defined(__FreeBSD__) && !defined(__QNX__) && (defined(__arm__) || defined(__aarch64__)) */
Copy link
Copy Markdown
Contributor

@gunes-arm gunes-arm Apr 7, 2026 •
edited
Loading

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

/* #elif (defined(__APPLE__)) && defined(__aarch64__) */


Expand Down Expand Up @@ -435,8 +440,32 @@ CpuInfo CpuInfo::build()
std::vector<CpuModel> cpus_model(1, midr_to_model(midr));
CpuInfo info(isa, cpus_model);
return info;
#elif defined(__aarch64__) && (defined(__OpenBSD__) || defined(__FreeBSD__) || \
defined(__APPLE__)) /* #elif(BARE_METAL) && defined(__aarch64__) */

#elif defined(__aarch64__) && (defined(__OpenBSD__) || defined(__FreeBSD__))
int ncpus = sysconf(_SC_NPROCESSORS_ONLN);

unsigned long hwcap = 0, hwcap2 = 0;
elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap));
elf_aux_info(AT_HWCAP2, &hwcap2, sizeof(hwcap2));

CpuIsaInfo isainfo;
std::vector<CpuModel> cpus_model(ncpus);

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;

#elif defined(__aarch64__) && defined(__APPLE__)
Copy link
Copy Markdown
Contributor

@gunes-arm gunes-arm Apr 7, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

/* #elif defined(__aarch64__) && (defined(__OpenBSD__) || defined(__FreeBSD__)) */

int ncpus = get_hw_capability("hw.perflevel0.logicalcpu");
CpuIsaInfo isainfo;
std::vector<CpuModel> cpus_model(ncpus);
Expand All @@ -453,7 +482,7 @@ CpuInfo CpuInfo::build()
isainfo.sme2 = get_hw_capability("hw.optional.arm.FEAT_SME2");
CpuInfo info(isainfo, cpus_model);
return info;
#elif defined(__aarch64__) && defined(_WIN64) /* #elif defined(__aarch64__) && defined(__APPLE__) */
#elif defined(__aarch64__) && defined(_WIN64) /* #elif defined(__aarch64__) && defined(__APPLE__) */
CpuIsaInfo isainfo;

isainfo.neon = IsProcessorFeaturePresent(PF_ARM_NEON_INSTRUCTIONS_AVAILABLE);
Expand Down Expand Up @@ -485,7 +514,7 @@ CpuInfo CpuInfo::build()
std::vector<CpuModel> cpus_model(ncpus);
CpuInfo info(isainfo, cpus_model);
return info;
#else /* #elif defined(__aarch64__) && defined(_WIN64) */
#else /* #elif defined(__aarch64__) && defined(_WIN64) */
CpuInfo info(CpuIsaInfo(), {CpuModel::GENERIC});
return info;
#endif /* !defined(BARE_METAL) && !defined(__APPLE__) && !defined(__OpenBSD__) && (defined(__arm__) || defined(__aarch64__)) */
Expand Down