From 03df68d3c33e83a23cf5f22389a37f2d09721bef Mon Sep 17 00:00:00 2001
From: nimelehin <nimelehin@gmail.com>
Date: Wed, 15 Sep 2021 18:37:08 +0000
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.

Change-Id: If19782851670e91fd31d119f4701c47373fa7e71
GitHub-Last-Rev: 91c7321ca49343c86917f071babec8a004ca5c77
GitHub-Pull-Request: golang/go#48403
Reviewed-on: https://go-review.googlesource.com/c/go/+/350151
Trust: Keith Randall <khr@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
---
 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 197441dfa7..605e133000 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