D-Programming-Language/dmd — comment on commit aada6cf50f347d4ebc018c4dab63695c83bcd7d4
File: src/backend/cgxmm.c line 53
By dawgfoto:

I don't know the minutiae of the floatreg flag, but probably you could
directly use MOVD/MOVQ xreg, reg.
It also seems that 'value' must not strictly be a floating point value at all.