From 91c7321ca49343c86917f071babec8a004ca5c77 Mon Sep 17 00:00:00 2001
From: nimelehin <nimelehin@gmail.com>
Date: Wed, 15 Sep 2021 13:27:21 +0300
Subject: [PATCH] runtime: fix setting of cpu features for amd64

Because of wrong case of letters, the cpu features flags were not
set properly for amd64.

Fixes #48406
---
 src/runtime/proc.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/runtime/proc.go b/src/runtime/proc.go
index 197441dfa75..605e1330000 100644
--- a/src/runtime/proc.go
+++ b/src/runtime/proc.go
@@ -623,7 +623,7 @@ func cpuinit() {
 	// Support cpu feature variables are used in code generated by the compiler
 	// to guard execution of instructions that can not be assumed to be always supported.
 	switch GOARCH {
-	case "386", "AMD64":
+	case "386", "amd64":
 		x86HasPOPCNT = cpu.X86.HasPOPCNT
 		x86HasSSE41 = cpu.X86.HasSSE41
 		x86HasFMA = cpu.X86.HasFMA