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https://opencores.org/ocsvn/neorv32/neorv32/trunk
[/] [neorv32/] [trunk/] [rtl/] [core/] [neorv32_cpu_regfile.vhd] - Diff between revs 58 and 60
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| Rev 58 |
Rev 60 |
| Line 113... |
Line 113... |
end if;
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end if;
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end if;
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end if;
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end process rf_access;
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end process rf_access;
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-- check if we are writing to x0 --
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-- check if we are writing to x0 --
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rd_is_r0 <= not or_all_f(ctrl_i(ctrl_rf_rd_adr4_c downto ctrl_rf_rd_adr0_c)) when (CPU_EXTENSION_RISCV_E = false) else
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rd_is_r0 <= not or_reduce_f(ctrl_i(ctrl_rf_rd_adr4_c downto ctrl_rf_rd_adr0_c)) when (CPU_EXTENSION_RISCV_E = false) else
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not or_all_f(ctrl_i(ctrl_rf_rd_adr3_c downto ctrl_rf_rd_adr0_c));
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not or_reduce_f(ctrl_i(ctrl_rf_rd_adr3_c downto ctrl_rf_rd_adr0_c));
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-- valid RF write access? --
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-- valid RF write access? --
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rf_we <= (ctrl_i(ctrl_rf_wb_en_c) and (not rd_is_r0)) or ctrl_i(ctrl_rf_r0_we_c);
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rf_we <= (ctrl_i(ctrl_rf_wb_en_c) and (not rd_is_r0)) or ctrl_i(ctrl_rf_r0_we_c);
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-- access addresses --
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-- access addresses --
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