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| author | Alejandro Soto <alejandro@34project.org> | 2022-09-25 17:47:38 -0600 |
|---|---|---|
| committer | Alejandro Soto <alejandro@34project.org> | 2022-09-25 17:47:38 -0600 |
| commit | f65e5611fde5e1c3e3a509cb2f3ffcafce5bbd33 (patch) | |
| tree | 9c375748a0e703a206016542d48afffb1c5afe51 /rtl/core/arm810.sv | |
| parent | 231f84b20e168afe36067b93bf30ed5e83f8e464 (diff) | |
Implement PSR flag handling
Diffstat (limited to '')
| -rw-r--r-- | rtl/core/arm810.sv | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/rtl/core/arm810.sv b/rtl/core/arm810.sv index 82479d1..9a99168 100644 --- a/rtl/core/arm810.sv +++ b/rtl/core/arm810.sv @@ -17,9 +17,6 @@ module arm810 word insn; ptr fetch_insn_pc, pc, pc_visible; - psr_flags flags; - assign flags = 4'b1010; //TODO - core_fetch #(.PREFETCH_ORDER(2)) fetch ( .flush(explicit_branch | wr_pc), @@ -35,15 +32,18 @@ module arm810 logic decode_execute, decode_undefined, decode_writeback, decode_branch; ptr decode_branch_offset; reg_num decode_rd; + alu_op decode_data_op; core_decode decode ( + .flags(next_flags), .execute(decode_execute), .undefined(decode_undefined), .writeback(decode_writeback), .rd(decode_rd), .branch(decode_branch), .branch_offset(decode_branch_offset), + .data_op(decode_data_op), .* ); @@ -51,6 +51,8 @@ module arm810 logic explicit_branch, writeback; ptr branch_target; psr_mode reg_mode; + alu_op data_op; + psr_flags flags, next_flags; core_cycles cycles ( @@ -59,14 +61,12 @@ module arm810 ); logic wr_pc; - word wr_value; + word wr_value, rd_value_a, rd_value_b; core_regs regs ( .rd_r_a(0), //TODO .rd_r_b(0), //TODO - .rd_value_a(), //TODO - .rd_value_b(), //TODO .rd_mode(reg_mode), .wr_mode(reg_mode), .wr_r(rd), @@ -75,4 +75,17 @@ module arm810 .* ); + psr_flags alu_flags; + + core_alu #(.W(32)) alu + ( + .op(data_op), + .a(rd_value_a), + .b(rd_value_b), + .c_in(flags.c), + .q(wr_value), + .nzcv(alu_flags), + .v_valid() //TODO + ); + endmodule |