Fix insn_bit. HOLY SHIT THE BOOT ROM WORKS c.c
[fpgaboy.git] / insn_alu_a.v
1 `ifdef EXECUTE
2         `INSN_ALU_A: begin
3                 `EXEC_NEWCYCLE
4                 `EXEC_INC_PC
5         end
6 `endif
7
8 `ifdef WRITEBACK
9         `INSN_ALU_A: begin
10                 case(opcode[5:3])
11                 `INSN_alu_RLCA: begin
12                         `_A <= {`_A[6:0],`_A[7]};
13                         `_F <= {`_F[7:5],`_A[7],`_F[3:0]};
14                 end
15                 `INSN_alu_RRCA: begin
16                         `_A <= {`_A[0],`_A[7:1]};
17                         `_F <= {`_F[7:5],`_A[0],`_F[3:0]};
18                 end
19                 `INSN_alu_RLA: begin
20                         `_A <= {`_A[6:0],`_F[4]};
21                         `_F <= {`_F[7:5],`_A[7],`_F[3:0]};
22                 end
23                 `INSN_alu_RRA: begin
24                         `_A <= {`_A[4],`_A[7:1]};
25                         `_F <= {`_F[7:5],`_A[0],`_F[3:0]};
26                 end
27                 `INSN_alu_CPL: begin
28                         `_A <= ~`_A;
29                         `_F <= {`_F[7],1'b1,1'b1,`_F[4:0]};
30                 end
31                 `INSN_alu_SCF: begin
32                         `_F <= {`_F[7:5],1'b1,`_F[3:0]};
33                 end
34                 `INSN_alu_CCF: begin
35                         `_F <= {`_F[7:5],~`_F[4],`_F[3:0]};
36                 end
37                 endcase
38         end
39 `endif
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