[rtl] minor comment edits

stnolting · Jan 11, 2025 · eac657f · eac657f
1 parent 7439a8c
commit eac657f
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Showing 2 changed files with 7 additions and 7 deletions.
diff --git a/rtl/core/neorv32_bus.vhd b/rtl/core/neorv32_bus.vhd
@@ -883,12 +883,12 @@ begin
       alu_res <= (others => '0');
     elsif rising_edge(clk_i) then
       case arbiter.cmd(2 downto 0) is
-        when "000"  => alu_res <= arbiter.wdata; -- AMOSWAP
-        when "001"  => alu_res <= std_ulogic_vector(unsigned(arbiter.rdata) + unsigned(arbiter.wdata)); -- AMOADD
-        when "010"  => alu_res <= arbiter.rdata xor arbiter.wdata; -- AMOXOR
-        when "011"  => alu_res <= arbiter.rdata and arbiter.wdata; -- AMOAND
-        when "100"  => alu_res <= arbiter.rdata or arbiter.wdata; -- AMOOR
-        when others => alu_res <= cmp_res; -- AMOMIN[U] / AMOMAX[U]
+        when "000"  => alu_res <= arbiter.wdata; -- AMOSWAP.W
+        when "001"  => alu_res <= std_ulogic_vector(unsigned(arbiter.rdata) + unsigned(arbiter.wdata)); -- AMOADD.W
+        when "010"  => alu_res <= arbiter.rdata xor arbiter.wdata; -- AMOXOR.W
+        when "011"  => alu_res <= arbiter.rdata and arbiter.wdata; -- AMOAND.W
+        when "100"  => alu_res <= arbiter.rdata or arbiter.wdata; -- AMOOR.W
+        when others => alu_res <= cmp_res; -- AMOMIN[U].W / AMOMAX[U].W
       end case;
     end if;
   end process amo_alu;

diff --git a/rtl/core/neorv32_cpu_control.vhd b/rtl/core/neorv32_cpu_control.vhd
@@ -1045,7 +1045,7 @@ begin
         end case;
 
       when opcode_amo_c => -- atomic memory operation
-        if RISCV_ISA_Zaamo and (exe_engine.ir(instr_funct3_msb_c downto instr_funct3_lsb_c) = "010") then
+        if RISCV_ISA_Zaamo and (exe_engine.ir(instr_funct3_msb_c downto instr_funct3_lsb_c) = "010") then -- word-quantity only
           case exe_engine.ir(instr_funct5_msb_c downto instr_funct5_lsb_c) is
             when "00001" | "00000" | "00100" | "01100" | "01000" | "10000" | "10100" | "11000" | "11100" => illegal_cmd <= '0';
             when others => illegal_cmd <= '1';