colin
/
picorv32
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Delete RISCV_FORMAL_ALTOPS.

This commit is contained in:
colin.liang 2023-01-09 15:35:06 +08:00
parent f02c0b23c4
commit 3feacd84c4
1 changed files with 10 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
picorv32.v
View File

@ -2127,15 +2127,8 @@ module picorv32_pcpi_fast_mul #(
assign pcpi_wr = active[EXTRA_MUL_FFS ? 3 : 1];
assign pcpi_wait = 0;
assign pcpi_ready = active[EXTRA_MUL_FFS ? 3 : 1];
`ifdef RISCV_FORMAL_ALTOPS
assign pcpi_rd =
instr_mul ? (pcpi_rs1 + pcpi_rs2) ^ 32'h5876063e :
instr_mulh ? (pcpi_rs1 + pcpi_rs2) ^ 32'hf6583fb7 :
instr_mulhsu ? (pcpi_rs1 - pcpi_rs2) ^ 32'hecfbe137 :
instr_mulhu ? (pcpi_rs1 + pcpi_rs2) ^ 32'h949ce5e8 : 1'bx;
`else
assign pcpi_rd = shift_out ? (EXTRA_MUL_FFS ? rd_q : rd) >> 32 : (EXTRA_MUL_FFS ? rd_q : rd);
`endif
endmodule
@ -2207,30 +2200,21 @@ module picorv32_pcpi_div (
running <= 0;
pcpi_ready <= 1;
pcpi_wr <= 1;
`ifdef RISCV_FORMAL_ALTOPS
case (1)
instr_div: pcpi_rd <= (pcpi_rs1 - pcpi_rs2) ^ 32'h7f8529ec;
instr_divu: pcpi_rd <= (pcpi_rs1 - pcpi_rs2) ^ 32'h10e8fd70;
instr_rem: pcpi_rd <= (pcpi_rs1 - pcpi_rs2) ^ 32'h8da68fa5;
instr_remu: pcpi_rd <= (pcpi_rs1 - pcpi_rs2) ^ 32'h3138d0e1;
endcase
`else
if (instr_div || instr_divu)
pcpi_rd <= outsign ? -quotient : quotient;
else
pcpi_rd <= outsign ? -dividend : dividend;
`endif
if (instr_div || instr_divu)
pcpi_rd <= outsign ? -quotient : quotient;
else
pcpi_rd <= outsign ? -dividend : dividend;
end else begin
if (divisor <= dividend) begin
dividend <= dividend - divisor;
quotient <= quotient | quotient_msk;
end
divisor <= divisor >> 1;
`ifdef RISCV_FORMAL_ALTOPS
quotient_msk <= quotient_msk >> 5;
`else
quotient_msk <= quotient_msk >> 1;
`endif
quotient_msk <= quotient_msk >> 1;
end
end
endmodule