diff options
Diffstat (limited to 'rtl/core/alu/alu.sv')
| -rw-r--r-- | rtl/core/alu/alu.sv | 32 |
1 files changed, 11 insertions, 21 deletions
diff --git a/rtl/core/alu/alu.sv b/rtl/core/alu/alu.sv index 6ded727..d999164 100644 --- a/rtl/core/alu/alu.sv +++ b/rtl/core/alu/alu.sv @@ -3,10 +3,9 @@ module core_alu #(parameter W=16) ( - input alu_control ctrl, + input alu_op op, input logic[W - 1:0] a, - base, - input logic[7:0] shift, + b, input logic c_in, output logic[W - 1:0] q, @@ -14,22 +13,13 @@ module core_alu output logic v_valid ); - logic c, v, swap, sub, and_not, c_shifter, c_add, v_add; - logic[W - 1:0] b, swap_a, swap_b, not_b, c_in_add, q_add, q_and, q_orr, q_xor; + logic c, v, swap, sub, and_not, c_add, v_add; + logic[W - 1:0] swap_a, swap_b, not_b, c_in_add, q_add, q_and, q_orr, q_xor; assign swap_a = swap ? b : a; assign swap_b = swap ? a : b; assign not_b = ~b; - core_alu_shifter #(.W(W)) shifter - ( - .base(base), - .shift(shift), - .b(b), - .c(c_shifter), - .* - ); - core_alu_add #(.W(W)) op_add ( .a(swap_a), @@ -61,7 +51,7 @@ module core_alu ); always_comb begin - unique case(ctrl.op) + unique case(op) `ALU_ADD, `ALU_ADC, `ALU_CMN, `ALU_CMP, `ALU_SUB, `ALU_SBC: swap = 0; @@ -72,7 +62,7 @@ module core_alu swap = 1'bx; endcase - unique case(ctrl.op) + unique case(op) `ALU_ADD, `ALU_CMN, `ALU_ADC: sub = 0; @@ -83,7 +73,7 @@ module core_alu sub = 1'bx; endcase - unique case(ctrl.op) + unique case(op) `ALU_ADD, `ALU_CMN, `ALU_CMP, `ALU_SUB, `ALU_RSB: c_in_add = 0; @@ -97,7 +87,7 @@ module core_alu c_in_add = {W{1'bx}}; endcase - unique case(ctrl.op) + unique case(op) `ALU_AND, `ALU_TST: and_not = 0; @@ -108,7 +98,7 @@ module core_alu and_not = 1'bx; endcase - unique case(ctrl.op) + unique case(op) `ALU_SUB, `ALU_RSB, `ALU_ADD, `ALU_ADC, `ALU_SBC, `ALU_RSC, `ALU_CMP, `ALU_CMN: q = q_add; @@ -128,9 +118,9 @@ module core_alu q = not_b; endcase - unique case(ctrl.op) + unique case(op) `ALU_AND, `ALU_EOR, `ALU_TST, `ALU_TEQ, `ALU_ORR, `ALU_MOV, `ALU_BIC, `ALU_MVN: begin - c = c_shifter; + c = c_in; v = 1'bx; v_valid = 0; end |