This patch sets the default floating point ABI based on the ISA
extensions that have been selected rather than defaulting to soft
float.
For 64-bit:
ISA 'D' selects lp64d
ISA 'F' selects lp64f
Otherwise select lp64
For 32-bit:
ISA 'D' selects ilp32d
ISA 'F' selects ilp32f
Otherwise select ilp32
This change was proposed by Palmer Dabbelt at SiFive.
Signed-off-by: Mark Corbin <mark.corbin@embecosm.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>