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runtime: unrecognized instruction "PCMPESTRI" #15874

AudriusButkevicius opened this issue May 29, 2016 · 2 comments


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commented May 29, 2016

  1. What version of Go are you using (go version)?

tip = b859a78

  1. What operating system and processor architecture are you using (go env)?

Intel i5-2320

Audrius@Audrius syncthing $ go env
set GOARCH=amd64
set GOBIN=
set GOEXE=.exe
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=C:\GoHome\
set GOROOT=C:\Go
set GOTOOLDIR=C:\Go\pkg\tool\windows_amd64
set CC=gcc
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0
set CXX=g++
  1. What did you do?

Tried to compile a hello world example

  1. What did you expect to see?

Compiled binary

  1. What did you see instead?
# runtime
C:\Go\src\runtime\asm_amd64.s:1853: unrecognized instruction "PCMPESTRI"
C:\Go\src\runtime\asm_amd64.s:1862: unrecognized instruction "PCMPESTRI"
asm: asm: assembly of C:\Go\src\runtime\asm_amd64.s failed

Seems to have been broken by 6b02a19


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commented May 29, 2016

Could it be that you are still using an old version of Go? What does go version print?

go env from tip doesn't have set GO15VENDOREXPERIMENT=1 in its output.

How did you build go compiler?


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commented May 29, 2016

Yep, I am a muppet.

@golang golang locked and limited conversation to collaborators May 29, 2017

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