SymbioticEDA_riscv-formal/insns/insn_blt.v

// DO NOT EDIT -- auto-generated from riscv-formal/insns/generate.py

module rvfi_insn_blt (
  input                                 rvfi_valid,
  input  [`RISCV_FORMAL_ILEN   - 1 : 0] rvfi_insn,
  input  [`RISCV_FORMAL_XLEN   - 1 : 0] rvfi_pc_rdata,
  input  [`RISCV_FORMAL_XLEN   - 1 : 0] rvfi_rs1_rdata,
  input  [`RISCV_FORMAL_XLEN   - 1 : 0] rvfi_rs2_rdata,
  input  [`RISCV_FORMAL_XLEN   - 1 : 0] rvfi_mem_rdata,
`ifdef RISCV_FORMAL_CSR_MISA
  input  [`RISCV_FORMAL_XLEN   - 1 : 0] rvfi_csr_misa_rdata,
  output [`RISCV_FORMAL_XLEN   - 1 : 0] spec_csr_misa_rmask,
`endif

  output                                spec_valid,
  output                                spec_trap,
  output [                       4 : 0] spec_rs1_addr,
  output [                       4 : 0] spec_rs2_addr,
  output [                       4 : 0] spec_rd_addr,
  output [`RISCV_FORMAL_XLEN   - 1 : 0] spec_rd_wdata,
  output [`RISCV_FORMAL_XLEN   - 1 : 0] spec_pc_wdata,
  output [`RISCV_FORMAL_XLEN   - 1 : 0] spec_mem_addr,
  output [`RISCV_FORMAL_XLEN/8 - 1 : 0] spec_mem_rmask,
  output [`RISCV_FORMAL_XLEN/8 - 1 : 0] spec_mem_wmask,
  output [`RISCV_FORMAL_XLEN   - 1 : 0] spec_mem_wdata
);

  // SB-type instruction format
  wire [`RISCV_FORMAL_ILEN-1:0] insn_padding = rvfi_insn >> 32;
  wire [`RISCV_FORMAL_XLEN-1:0] insn_imm = $signed({rvfi_insn[31], rvfi_insn[7], rvfi_insn[30:25], rvfi_insn[11:8], 1'b0});
  wire [4:0] insn_rs2    = rvfi_insn[24:20];
  wire [4:0] insn_rs1    = rvfi_insn[19:15];
  wire [2:0] insn_funct3 = rvfi_insn[14:12];
  wire [6:0] insn_opcode = rvfi_insn[ 6: 0];

`ifdef RISCV_FORMAL_CSR_MISA
  wire misa_ok = (rvfi_csr_misa_rdata & `RISCV_FORMAL_XLEN'h 0) == `RISCV_FORMAL_XLEN'h 0;
  assign spec_csr_misa_rmask = `RISCV_FORMAL_XLEN'h 4;
  wire ialign16 = (rvfi_csr_misa_rdata & `RISCV_FORMAL_XLEN'h 4) != `RISCV_FORMAL_XLEN'h 0;
`else
  wire misa_ok = 1;
`ifdef RISCV_FORMAL_COMPRESSED
  wire ialign16 = 1;
`else
  wire ialign16 = 0;
`endif
`endif

  // BLT instruction
  wire cond = $signed(rvfi_rs1_rdata) < $signed(rvfi_rs2_rdata);
  wire [`RISCV_FORMAL_XLEN-1:0] next_pc = cond ? rvfi_pc_rdata + insn_imm : rvfi_pc_rdata + 4;
  assign spec_valid = rvfi_valid && !insn_padding && insn_funct3 == 3'b 100 && insn_opcode == 7'b 1100011;
  assign spec_rs1_addr = insn_rs1;
  assign spec_rs2_addr = insn_rs2;
  assign spec_pc_wdata = next_pc;
  assign spec_trap = (ialign16 ? (next_pc[0] != 0) : (next_pc[1:0] != 0)) || !misa_ok;

  // default assignments
  assign spec_rd_addr = 0;
  assign spec_rd_wdata = 0;
  assign spec_mem_addr = 0;
  assign spec_mem_rmask = 0;
  assign spec_mem_wmask = 0;
  assign spec_mem_wdata = 0;
endmodule