RISCBoy

# compressed instructions

# C0 encoding space
c.addi4spn 1..0=0 15..13=0 12=ignore 11..2=ignore
c.fld      1..0=0 15..13=1 12=ignore 11..2=ignore
c.lw       1..0=0 15..13=2 12=ignore 11..2=ignore
c.flw      1..0=0 15..13=3 12=ignore 11..2=ignore # c.ld for RV64
c.fsd      1..0=0 15..13=5 12=ignore 11..2=ignore
c.sw       1..0=0 15..13=6 12=ignore 11..2=ignore
c.fsw      1..0=0 15..13=7 12=ignore 11..2=ignore # c.sd for RV64

# C1 encoding space
c.addi     1..0=1 15..13=0 12=ignore 11..2=ignore
c.jal      1..0=1 15..13=1 12=ignore 11..2=ignore # c.addiw for RV64
c.li       1..0=1 15..13=2 12=ignore 11..2=ignore
c.lui      1..0=1 15..13=3 12=ignore 11..2=ignore # c.addi16sp when rd=2
c.srli     1..0=1 15..13=4 12=ignore 11..10=0 9..2=ignore
c.srai     1..0=1 15..13=4 12=ignore 11..10=1 9..2=ignore
c.andi     1..0=1 15..13=4 12=ignore 11..10=2 9..2=ignore
c.sub      1..0=1 15..13=4 12=0      11..10=3 9..7=ignore 6..5=0 4..2=ignore
c.xor      1..0=1 15..13=4 12=0      11..10=3 9..7=ignore 6..5=1 4..2=ignore
c.or       1..0=1 15..13=4 12=0      11..10=3 9..7=ignore 6..5=2 4..2=ignore
c.and      1..0=1 15..13=4 12=0      11..10=3 9..7=ignore 6..5=3 4..2=ignore
c.subw     1..0=1 15..13=4 12=1      11..10=3 9..7=ignore 6..5=0 4..2=ignore
c.addw     1..0=1 15..13=4 12=1      11..10=3 9..7=ignore 6..5=1 4..2=ignore
c.j        1..0=1 15..13=5 12=ignore 11..2=ignore
c.beqz     1..0=1 15..13=6 12=ignore 11..2=ignore
c.bnez     1..0=1 15..13=7 12=ignore 11..2=ignore

# C2 encoding space
c.slli     1..0=2 15..13=0 12=ignore 11..2=ignore
c.fldsp    1..0=2 15..13=1 12=ignore 11..2=ignore
c.lwsp     1..0=2 15..13=2 12=ignore 11..2=ignore
c.flwsp    1..0=2 15..13=3 12=ignore 11..2=ignore # c.ldsp for RV64
c.mv       1..0=2 15..13=4 12=0      11..2=ignore # !rs2 = c.jr
c.add      1..0=2 15..13=4 12=1      11..2=ignore # !rs1 = c.ebreak; !rs2=c.jalr
c.fsdsp    1..0=2 15..13=5 12=ignore 11..2=ignore
c.swsp     1..0=2 15..13=6 12=ignore 11..2=ignore
c.fswsp    1..0=2 15..13=7 12=ignore 11..2=ignore # c.sdsp for RV64