#154 ✓hold
Peter Johnson

Encode SSE instructions as AVX

Reported by Peter Johnson | June 25th, 2011 @ 07:51 PM

Originally posted on Trac by dmitri.veprinsky@intel.com
Original Trac Ticket

  Description

In order to do easy porting from SSE to AVX.
What do you think about feature, that generate AVX code by SSE instructions
For example

addpd xmm1, xmm2 should be encoded as vaddpd xmm1,xmm1,xmm2
addpd xmm1, should be encoded as vaddpd xmm1,xmm1,

Trac Attachments

h3. Trac Comments
comment:1

              Changed 3 years ago by peter@tortall.net


We support this already.  Just add a "v" prefix, so vaddpd xmm1, xmm2 -> vaddpd xmm1, xmm1, xmm2.

I considered adding a "DEFAULT VEX" directive to change addpd to generate the VEX version, but in discussion with the NASM folks this idea was shot down.

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