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ggml : use svcntb() for SVE vector length detection #17474

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Merged
merged 1 commit into from
Dec 2, 2025
Merged

ggml : use svcntb() for SVE vector length detection #17474

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18 changes: 5 additions & 13 deletions ggml/src/ggml-cpu/ggml-cpu.c
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Original file line number Diff line number Diff line change
Expand Up @@ -683,22 +683,14 @@ bool ggml_is_numa(void) {
}

#if defined(__ARM_ARCH)

#if defined(__linux__) && defined(__aarch64__)
#include <sys/auxv.h>
#endif

static void ggml_init_arm_arch_features(void) {
#if defined(__aarch64__) && defined(__ARM_FEATURE_SVE)
#if defined(__linux__)
ggml_arm_arch_features.sve_cnt = PR_SVE_VL_LEN_MASK & prctl(PR_SVE_GET_VL);
#include <arm_sve.h>
static void ggml_init_arm_arch_features(void) {
ggml_arm_arch_features.sve_cnt = svcntb();
}
#else
// TODO: add support of SVE for non-linux systems
#error "TODO: SVE is not supported on this platform. To use SVE, sve_cnt needs to be initialized here."
#endif
static void ggml_init_arm_arch_features(void) {}
#endif
}

#endif // __ARM_ARCH

struct ggml_tensor * ggml_new_i32(struct ggml_context * ctx, int32_t value) {
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