[GAS] x86_64 gas doesn't recognize movzx r64,r/m32 (intel notaion)

[Sergei Trofimovich]

Hello!
  I have such environment:
        GNU assembler 2.17
        This assembler was configured for a
            target of `x86_64-pc-linux-gnu'.
        gcc (GCC) 4.1.1 (Gentoo 4.1.1-r3)

  This example won't compile for me (main.S):
        .intel_syntax noprefix

        .text
        .globl main
                .type main, @function
        main:
                movzx rax, eax
                movzx rax, dword ptr [eip]
compiling...$ cc    -c -o main.o main.S

main.S: Assembler messages:
main.S:7: Error: suffix or operands invalid for `movzx'
main.S:8: Error: suffix or operands invalid for `movzx'

Is it known bug/feature?

Thanks!