rv64_f


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# RV64F additions to RV32F

fcvt.l.s  rd rs1 24..20=2 31..27=0x18 rm       26..25=0 6..2=0x14 1..0=3
fcvt.lu.s rd rs1 24..20=3 31..27=0x18 rm       26..25=0 6..2=0x14 1..0=3
fcvt.s.l  rd rs1 24..20=2 31..27=0x1A rm       26..25=0 6..2=0x14 1..0=3
fcvt.s.lu rd rs1 24..20=3 31..27=0x1A rm       26..25=0 6..2=0x14 1..0=3