FNMSUB.Q rs3 11 rs2 rs1 funct3 rd opcode R4-type imm[11:0] rs1 000 rd 0110011 MUL 0000001 rs2 rs1 100 imm[4:1|11] 1100011 BNE imm[12|10:5] rs2 rs1 010 rd 1010011 FMV.H.X RV64Zfh Standard Extension Source Registers Destination Registers Accumulating CSRs FCVT.L.D rs1, frm*
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