On Thu, Jan 14, 2016 at 5:26 PM, Ganesh Ajjanagadde <gajja...@mit.edu> wrote: > readability still no.
"<instruction> dst, mult1, mult2, add" is significantly more readable than "<instruction_with_some_digits> src1, src2, src3" where you need to mentally parse which source operand corresponds to which mathematical operator depending on the order of the digits. Compare the following instruction sequences which are identical (just a random example I made up on the spot): ; m0 = m2 * m4 + m0 ; m1 = m2 * m1 + m3 ; m2 = m2 * m3 + m4 fmaddpd m0, m2, m4, m0 fmaddpd m1, m2, m1, m3 fmaddpd m2, m2, m3, m4 vfmadd231pd m0, m2, m4 vfmadd213pd m1, m2, m3 vfmadd132pd m2, m4, m3 In the first section it's immediately clear at a quick glance which registers get multiplied by which. The second section on the other hand takes some time to parse. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
