Fix add sp, imm8 *sweatdrop*
[fpgaboy.git] / core / insn_ldx_ahl.v
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1`define INSN_LDx_AHL 9'b0001xx010 // LDD/LDI A,(HL) / (HL),A
2
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3`ifdef EXECUTE
4 `INSN_LDx_AHL: begin
5 case (cycle)
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6 0: if (opcode[3]) // LDx A, (HL)
7 `EXEC_READ(`_HL)
8 else
9 `EXEC_WRITE(`_HL, `_A)
3ad960bd 10 1: begin
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11 `EXEC_NEWCYCLE
12 `EXEC_INC_PC
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13 end
14 endcase
15 end
16`endif
17
18`ifdef WRITEBACK
19 `INSN_LDx_AHL: begin
20 case (cycle)
21 0: begin /* Type F */ end
22 1: begin
23 if (opcode[3])
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24 `_A <= rdata;
25 `_HL <= opcode[4] ? // if set, LDD, else LDI
26 (`_HL - 1) :
27 (`_HL + 1);
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28 end
29 endcase
30 end
31`endif
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