[llvm-commits] [llvm] r77940 - in /llvm/trunk: lib/Target/X86/X86ISelLowering.cpp lib/Target/X86/X86InstrMMX.td test/CodeGen/X86/2009-08-02-mmx-scalar-to-vector.ll test/CodeGen/X86/mmx-bitcast-to-i64.ll

[Evan Cheng]

I don't think even Intel knows which is which. Worst opcode names ever.

Evan

On Aug 2, 2009, at 8:03 PM, Eli Friedman wrote:

> On Sun, Aug 2, 2009 at 7:53 PM, Rafael  
> Espindola<espindola at google.com> wrote:
>>> AFAIK, MMX_MOVD64from64rr was originally written as "movd" for
>>> compatibility reasons; why are you changing it?
>>
>> Because it is supposed to move 64 bits. movd is 32 bits, right?
>>
>> I checked with gcc 4.3 and it uses movq.
>
> Really?  I get two movd's for the following testcase:
>
> #include <mmintrin.h>
> long long a(__m64 x) { return _mm_cvtm64_si64(x); }
> __m64 b(long long x) { return _mm_cvtsi64_m64(x); }
>
> -Eli
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