llvm dev - Jul 2012 - [LLVMdev] clan -x assembler fails on vcvttsd2siq instruction

Dear llvm developers,

I am trying to run clang assembler to use avx instructions on Mac.

I use gcc 4.7.1 to generate  .s files from .c files. I can assemble foo.s by

clang -c -x assembler foo.s

to get foo.o but

clang -c -x assembler foo_long.s

fails with

$clang -x assembler foo_long.s 
foo_long.s:27:2: error: invalid instruction mnemonic 'vcvttsd2siq'
        vcvttsd2siq     %xmm0, %rax
        ^~~~~~~~~~~

clang can assemble many other .s files with avx instructions.  I tried the
default clang, clang+llvm 3.1 binary and svn checked out llvm/clang. All same.

Have you any idea?


Thank you so much!

Nobu

Nobu Katayama
nobu.katayama at ipmu.jp

foo.c

void foo(int *a, double *b, int n){
   int i;
   for (i=0; i<8*n; i++){
      a[i] = b[i];
   }
}

foo_long.c

void foo(long *a, double *b, int n){
   int i;
   for (i=0; i<8*n; i++){
      a[i] = b[i];
   }
}

diff foo.s foo_long.s
17c17
< 	leaq	0(,%rax,4), %rdx
---
> 	leaq	0(,%rax,8), %rdx
27,28c27,28
< 	vcvttsd2si	%xmm0, %eax
< 	movl	%eax, (%rdx)
---
> 	vcvttsd2siq	%xmm0, %rax
> 	movq	%rax, (%rdx)

片山 伸彦 <nobu.katayama <at> ipmu.jp> writes:
> 
> Dear llvm developers,
> 
> I am trying to run clang assembler to use avx instructions on Mac.
> 
> I use gcc 4.7.1 to generate  .s files from .c files. I can assemble foo.s
by
> 
> clang -c -x assembler foo.s
> 
> to get foo.o but
> 
> clang -c -x assembler foo_long.s
> 
> fails with
> 
> $clang -x assembler foo_long.s 
> foo_long.s:27:2: error: invalid instruction mnemonic 'vcvttsd2siq'
>         vcvttsd2siq     %xmm0, %rax
>         ^~~~~~~~~~~
> 
> clang can assemble many other .s files with avx instructions.  I tried the
default clang, clang+llvm 3.1
> binary and svn checked out llvm/clang. All same.
> 
> Have you any idea?
> 
> Thank you so much!
> 
> Nobu
> 
> Nobu Katayama
> nobu.katayama <at> ipmu.jp

Same problem here. I have used clang (both OS X 10.6.8 native clang-2.9 and
Macports clang-3.1) in a wrapper script along with GCC 4.7.1 to build ATLAS
(tuned BLAS and LAPACK libraries). I ran into this error as well.

error: invalid instruction mnemonic 'vcvttsd2siq'
        vcvttsd2siq     %xmm0, %rax

The wrapper script is described here:
http://old.nabble.com/Re%3a-gcc,-as,-AVX,-binutils-and-MacOS-X-10.7-p32584737.html

JJ

On Sun, Jul 15, 2012 at 4:33 PM, 片山 伸彦 <nobu.katayama at ipmu.jp>
wrote:
> Dear llvm developers,
>
> I am trying to run clang assembler to use avx instructions on Mac.
>
> I use gcc 4.7.1 to generate  .s files from .c files. I can assemble foo.s
by
>
> clang -c -x assembler foo.s
>
> to get foo.o but
>
> clang -c -x assembler foo_long.s
>
> fails with
>
> $clang -x assembler foo_long.s
> foo_long.s:27:2: error: invalid instruction mnemonic 'vcvttsd2siq'
>         vcvttsd2siq     %xmm0, %rax
>         ^~~~~~~~~~~
>
> clang can assemble many other .s files with avx instructions.  I tried the
default clang, clang+llvm 3.1 binary and svn checked out llvm/clang. All same.
>
> Have you any idea?
>
>
> Thank you so much!
It looks like LLVM expects both versions to be spelled without the
"q".

-Eli

Hi all,

Thanks for response. Will this be fixed sometime soon?
Is there anything I can do to make it work in my copy of the latest llvm source?

Best,
Nobu

2012/7/17 jj <h59213 at rtrtr.com>:
> 片山 伸彦 <nobu.katayama <at> ipmu.jp> writes:
>
>>
>> Dear llvm developers,
>>
>> I am trying to run clang assembler to use avx instructions on Mac.
>>
>> I use gcc 4.7.1 to generate  .s files from .c files. I can assemble
foo.s by
>>
>> clang -c -x assembler foo.s
>>
>> to get foo.o but
>>
>> clang -c -x assembler foo_long.s
>>
>> fails with
>>
>> $clang -x assembler foo_long.s
>> foo_long.s:27:2: error: invalid instruction mnemonic
'vcvttsd2siq'
>>         vcvttsd2siq     %xmm0, %rax
>>         ^~~~~~~~~~~
>>
>> clang can assemble many other .s files with avx instructions.  I tried
the
> default clang, clang+llvm 3.1
>> binary and svn checked out llvm/clang. All same.
>>
>> Have you any idea?
>>
>> Thank you so much!
>>
>> Nobu
>>
>> Nobu Katayama
>> nobu.katayama <at> ipmu.jp
>
>
> Same problem here. I have used clang (both OS X 10.6.8 native clang-2.9 and
> Macports clang-3.1) in a wrapper script along with GCC 4.7.1 to build ATLAS
> (tuned BLAS and LAPACK libraries). I ran into this error as well.
>
> error: invalid instruction mnemonic 'vcvttsd2siq'
>         vcvttsd2siq     %xmm0, %rax
>
> The wrapper script is described here:
>
http://old.nabble.com/Re%3a-gcc,-as,-AVX,-binutils-and-MacOS-X-10.7-p32584737.html
>
> JJ
>
>
>
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