41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
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package xxh3
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import (
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"unsafe"
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"github.com/klauspost/cpuid/v2"
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)
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var (
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hasAVX2 = cpuid.CPU.Has(cpuid.AVX2)
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hasSSE2 = cpuid.CPU.Has(cpuid.SSE2) // Always true on amd64
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hasAVX512 = cpuid.CPU.Has(cpuid.AVX512F)
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)
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//go:noescape
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func accumAVX2(acc *[8]u64, data, key unsafe.Pointer, len u64)
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//go:noescape
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func accumAVX512(acc *[8]u64, data, key unsafe.Pointer, len u64)
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//go:noescape
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func accumSSE(acc *[8]u64, data, key unsafe.Pointer, len u64)
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//go:noescape
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func accumBlockAVX2(acc *[8]u64, data, key unsafe.Pointer)
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//go:noescape
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func accumBlockSSE(acc *[8]u64, data, key unsafe.Pointer)
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func withOverrides(avx512, avx2, sse2 bool, cb func()) {
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avx512Orig, avx2Orig, sse2Orig := hasAVX512, hasAVX2, hasSSE2
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hasAVX512, hasAVX2, hasSSE2 = avx512, avx2, sse2
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defer func() { hasAVX512, hasAVX2, hasSSE2 = avx512Orig, avx2Orig, sse2Orig }()
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cb()
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}
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func withAVX512(cb func()) { withOverrides(hasAVX512, false, false, cb) }
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func withAVX2(cb func()) { withOverrides(false, hasAVX2, false, cb) }
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func withSSE2(cb func()) { withOverrides(false, false, hasSSE2, cb) }
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func withGeneric(cb func()) { withOverrides(false, false, false, cb) }
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