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package sysinfo
import "core:sys/unix"
@(init, private)
init_cpu_features :: proc "contextless" () {
@(static) features: CPU_Features
defer cpu.features = features
try_set :: proc "contextless" (name: cstring, feature: CPU_Feature) -> (ok: bool) {
support: b32
if ok = unix.sysctlbyname(name, &support); ok && support {
features += { feature }
}
return
}
// Docs from Apple: https://developer.apple.com/documentation/kernel/1387446-sysctlbyname/determining_instruction_set_characteristics
// Features from there that do not have (or I didn't find) an equivalent on Linux are commented out below.
// Advanced SIMD & floating-point capabilities:
{
if !try_set("hw.optional.AdvSIMD", .asimd) {
try_set("hw.optional.neon", .asimd)
}
try_set("hw.optional.floatingpoint", .floatingpoint)
if !try_set("hw.optional.AdvSIMD_HPFPCvt", .asimdhp) {
try_set("hw.optional.neon_hpfp", .asimdhp)
}
try_set("hw.optional.arm.FEAT_BF16", .bf16)
// try_set("hw.optional.arm.FEAT_DotProd", .dotprod)
if !try_set("hw.optional.arm.FEAT_FCMA", .fcma) {
try_set("hw.optional.armv8_3_compnum", .fcma)
}
if !try_set("hw.optional.arm.FEAT_FHM", .fhm) {
try_set("hw.optional.armv8_2_fhm", .fhm)
}
if !try_set("hw.optional.arm.FEAT_FP16", .fp16) {
try_set("hw.optional.neon_fp16", .fp16)
}
try_set("hw.optional.arm.FEAT_FRINTTS", .frint)
try_set("hw.optional.arm.FEAT_I8MM", .i8mm)
try_set("hw.optional.arm.FEAT_JSCVT", .jscvt)
try_set("hw.optional.arm.FEAT_RDM", .rdm)
}
// Integer capabilities:
{
try_set("hw.optional.arm.FEAT_FlagM", .flagm)
try_set("hw.optional.arm.FEAT_FlagM2", .flagm2)
try_set("hw.optional.armv8_crc32", .crc32)
}
// Atomic and memory ordering instruction capabilities:
{
try_set("hw.optional.arm.FEAT_LRCPC", .lrcpc)
try_set("hw.optional.arm.FEAT_LRCPC2", .lrcpc2)
if !try_set("hw.optional.arm.FEAT_LSE", .lse) {
try_set("hw.optional.armv8_1_atomics", .lse)
}
// try_set("hw.optional.arm.FEAT_LSE2", .lse2)
}
// Encryption capabilities:
{
try_set("hw.optional.arm.FEAT_AES", .aes)
try_set("hw.optional.arm.FEAT_PMULL", .pmull)
try_set("hw.optional.arm.FEAT_SHA1", .sha1)
try_set("hw.optional.arm.FEAT_SHA256", .sha256)
if !try_set("hw.optional.arm.FEAT_SHA512", .sha512) {
try_set("hw.optional.armv8_2_sha512", .sha512)
}
if !try_set("hw.optional.arm.FEAT_SHA3", .sha3) {
try_set("hw.optional.armv8_2_sha3", .sha3)
}
}
// General capabilities:
{
// try_set("hw.optional.arm.FEAT_BTI", .bti)
// try_set("hw.optional.arm.FEAT_DPB", .dpb)
// try_set("hw.optional.arm.FEAT_DPB2", .dpb2)
// try_set("hw.optional.arm.FEAT_ECV", .ecv)
try_set("hw.optional.arm.FEAT_SB", .sb)
try_set("hw.optional.arm.FEAT_SSBS", .ssbs)
}
}
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