Am 12.11.19 um 13:22 schrieb Marco van de Voort:
I compiled some bits with avx, and noticed that when you do
asingle:=someconstant*othersingle;
then that generates something like
vmovss TC_$FFTS_$$_C31(%rip),%xmm2
vmulss %xmm0,%xmm2,%xmm0
while if you do
asingle:=othersingle*someconstant;
it generates
vmulss TC_$FFTS_$$_C32(%rip),%xmm2,%xmm2
I assume the reason is that only the first param can be an address, and
the second a register. But the compiler isn't smart enough to exchange
them.
This was an easy one :) Fixed in r43509
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