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Integer moves for fp regs
- To: egcs at cygnus dot com, gcc2 at cygnus dot com
- Subject: Integer moves for fp regs
- From: Michael Hayes <michaelh at ongaonga dot chch dot cri dot nz>
- Date: Wed, 29 Jul 1998 10:52:32 GMT
md.texi has this tantalising comment to say:
"There may also be a need to support fixed point @samp{mov@var{m}}
instructions in and out of floating point registers. Unfortunately, I
have forgotten why this was so, and I don't know whether it is still
true."
Does anyone know the current situation regarding this?
I see that caller-save expects that it can save/restore hard floating
point registers with integer move instructions, provided the registers
also support integer modes. Unfortunately, this is not true for the
C4x and I'm wondering what other parts of GCC make this assumption.