| Line 146... |
Line 146... |
`ifdef OR1200_IMPL_ADDC
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`ifdef OR1200_IMPL_ADDC
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or result_csum
|
or result_csum
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`endif
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`endif
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) begin
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) begin
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`ifdef OR1200_CASE_DEFAULT
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`ifdef OR1200_CASE_DEFAULT
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casex (alu_op) // synopsys parallel_case
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casez (alu_op) // synopsys parallel_case
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`else
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`else
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casex (alu_op) // synopsys full_case parallel_case
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casez (alu_op) // synopsys full_case parallel_case
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`endif
|
`endif
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`OR1200_ALUOP_FF1: begin
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`OR1200_ALUOP_FF1: begin
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result = a[0] ? 1 : a[1] ? 2 : a[2] ? 3 : a[3] ? 4 : a[4] ? 5 : a[5] ? 6 : a[6] ? 7 : a[7] ? 8 : a[8] ? 9 : a[9] ? 10 : a[10] ? 11 : a[11] ? 12 : a[12] ? 13 : a[13] ? 14 : a[14] ? 15 : a[15] ? 16 : a[16] ? 17 : a[17] ? 18 : a[18] ? 19 : a[19] ? 20 : a[20] ? 21 : a[21] ? 22 : a[22] ? 23 : a[23] ? 24 : a[24] ? 25 : a[25] ? 26 : a[26] ? 27 : a[27] ? 28 : a[28] ? 29 : a[29] ? 30 : a[30] ? 31 : a[31] ? 32 : 0;
|
result = a[0] ? 1 : a[1] ? 2 : a[2] ? 3 : a[3] ? 4 : a[4] ? 5 : a[5] ? 6 : a[6] ? 7 : a[7] ? 8 : a[8] ? 9 : a[9] ? 10 : a[10] ? 11 : a[11] ? 12 : a[12] ? 13 : a[13] ? 14 : a[14] ? 15 : a[15] ? 16 : a[16] ? 17 : a[17] ? 18 : a[18] ? 19 : a[19] ? 20 : a[20] ? 21 : a[21] ? 22 : a[22] ? 23 : a[23] ? 24 : a[24] ? 25 : a[25] ? 26 : a[26] ? 27 : a[27] ? 28 : a[28] ? 29 : a[29] ? 30 : a[30] ? 31 : a[31] ? 32 : 0;
|
end
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end
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`OR1200_ALUOP_CUST5 : begin
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`OR1200_ALUOP_CUST5 : begin
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| Line 218... |
Line 218... |
// l.cust5 custom instructions
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// l.cust5 custom instructions
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//
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//
|
// Examples for move byte, set bit and clear bit
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// Examples for move byte, set bit and clear bit
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//
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//
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always @(cust5_op or cust5_limm or a or b) begin
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always @(cust5_op or cust5_limm or a or b) begin
|
casex (cust5_op) // synopsys parallel_case
|
casez (cust5_op) // synopsys parallel_case
|
5'h1 : begin
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5'h1 : begin
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casex (cust5_limm[1:0])
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casez (cust5_limm[1:0])
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2'h0: result_cust5 = {a[31:8], b[7:0]};
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2'h0: result_cust5 = {a[31:8], b[7:0]};
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2'h1: result_cust5 = {a[31:16], b[7:0], a[7:0]};
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2'h1: result_cust5 = {a[31:16], b[7:0], a[7:0]};
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2'h2: result_cust5 = {a[31:24], b[7:0], a[15:0]};
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2'h2: result_cust5 = {a[31:24], b[7:0], a[15:0]};
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2'h3: result_cust5 = {b[7:0], a[23:0]};
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2'h3: result_cust5 = {b[7:0], a[23:0]};
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endcase
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endcase
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| Line 248... |
Line 248... |
always @(alu_op or result_sum or result_and or flagcomp
|
always @(alu_op or result_sum or result_and or flagcomp
|
`ifdef OR1200_IMPL_ADDC
|
`ifdef OR1200_IMPL_ADDC
|
or result_csum
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or result_csum
|
`endif
|
`endif
|
) begin
|
) begin
|
casex (alu_op) // synopsys parallel_case
|
casez (alu_op) // synopsys parallel_case
|
`ifdef OR1200_ADDITIONAL_FLAG_MODIFIERS
|
`ifdef OR1200_ADDITIONAL_FLAG_MODIFIERS
|
`OR1200_ALUOP_ADD : begin
|
`OR1200_ALUOP_ADD : begin
|
flagforw = (result_sum == 32'h0000_0000);
|
flagforw = (result_sum == 32'h0000_0000);
|
flag_we = 1'b1;
|
flag_we = 1'b1;
|
end
|
end
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| Line 289... |
Line 289... |
`ifdef OR1200_IMPL_SUB
|
`ifdef OR1200_IMPL_SUB
|
or cy_sub
|
or cy_sub
|
`endif
|
`endif
|
`endif
|
`endif
|
) begin
|
) begin
|
casex (alu_op) // synopsys parallel_case
|
casez (alu_op) // synopsys parallel_case
|
`ifdef OR1200_IMPL_CY
|
`ifdef OR1200_IMPL_CY
|
`OR1200_ALUOP_ADD : begin
|
`OR1200_ALUOP_ADD : begin
|
cyforw = cy_sum;
|
cyforw = cy_sum;
|
cy_we = 1'b1;
|
cy_we = 1'b1;
|
end
|
end
|
