| // Copyright 2025 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| package scan | |
| import ( | |
| "internal/cpu" | |
| "internal/runtime/gc" | |
| "unsafe" | |
| ) | |
| func ScanSpanPacked(mem unsafe.Pointer, bufp *uintptr, objMarks *gc.ObjMask, sizeClass uintptr, ptrMask *gc.PtrMask) (count int32) { | |
| if CanAVX512() { | |
| return ScanSpanPackedAVX512(mem, bufp, objMarks, sizeClass, ptrMask) | |
| } | |
| panic("not implemented") | |
| } | |
| func HasFastScanSpanPacked() bool { | |
| return avx512ScanPackedReqsMet | |
| } | |
| // -- AVX512 -- | |
| func CanAVX512() bool { | |
| return avx512ScanPackedReqsMet | |
| } | |
| func ScanSpanPackedAVX512(mem unsafe.Pointer, bufp *uintptr, objMarks *gc.ObjMask, sizeClass uintptr, ptrMask *gc.PtrMask) (count int32) { | |
| return FilterNilAVX512(bufp, scanSpanPackedAVX512(mem, bufp, objMarks, sizeClass, ptrMask)) | |
| } | |
| //go:noescape | |
| func scanSpanPackedAVX512(mem unsafe.Pointer, bufp *uintptr, objMarks *gc.ObjMask, sizeClass uintptr, ptrMask *gc.PtrMask) (count int32) | |
| var avx512ScanPackedReqsMet = cpu.X86.HasAVX512VL && | |
| cpu.X86.HasAVX512BW && | |
| cpu.X86.HasGFNI && | |
| cpu.X86.HasAVX512BITALG && | |
| cpu.X86.HasAVX512VBMI | |