forked from rosa/hakurei
30 lines
1.1 KiB
Diff
30 lines
1.1 KiB
Diff
From 45929774c3d5c084cc478afba63c77cf67a68bd7 Mon Sep 17 00:00:00 2001
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From: khr@golang.org <khr@golang.org>
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Date: Wed, 18 Feb 2026 09:09:57 -0800
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Subject: [PATCH] internal/runtime/gc/scan: require popcnt for x86
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The GOAMD64=v1 test disables popcnt instructions, which is a feature
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this package's amd64 assembly uses.
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Fixes #77674
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Change-Id: I7be9bb665838f5da50275f96ef3df398412bb44a
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Reviewed-on: https://go-review.googlesource.com/c/go/+/746640
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LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
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Reviewed-by: Keith Randall <khr@google.com>
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Auto-Submit: Keith Randall <khr@golang.org>
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---
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diff --git a/src/internal/runtime/gc/scan/scan_amd64.go b/src/internal/runtime/gc/scan/scan_amd64.go
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index c03021c7d4..544b237770 100644
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--- a/src/internal/runtime/gc/scan/scan_amd64.go
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+++ b/src/internal/runtime/gc/scan/scan_amd64.go
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@@ -39,4 +39,5 @@ var avx512ScanPackedReqsMet = cpu.X86.HasAVX512VL &&
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cpu.X86.HasGFNI &&
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cpu.X86.HasAVX512BITALG &&
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cpu.X86.HasAVX512DQ && // for kmovb, see #79871
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- cpu.X86.HasAVX512VBMI
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+ cpu.X86.HasAVX512VBMI &&
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+ cpu.X86.HasPOPCNT
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