X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/81358c71b258a72a2777bba0a0b4a82a7cae298a..5bac4cf0a60acac6826eb3215e1526d48ba8f7ac:/insn_push_reg.v

diff --git a/insn_push_reg.v b/insn_push_reg.v
index 7a32301..afec70a 100644
--- a/insn_push_reg.v
+++ b/insn_push_reg.v
@@ -1,30 +1,22 @@
 `ifdef EXECUTE
 	`INSN_PUSH_reg: begin	/* PUSH is 16 cycles! */
 		case (cycle)
-		0:	begin
-				wr <= 1;
-				address <= {registers[`REG_SPH],registers[`REG_SPL]}-1;
-				case (opcode[5:4])
-				`INSN_stack_AF:	wdata <= registers[`REG_A];
-				`INSN_stack_BC:	wdata <= registers[`REG_B];
-				`INSN_stack_DE:	wdata <= registers[`REG_D];
-				`INSN_stack_HL:	wdata <= registers[`REG_H];
-				endcase
-			end
-		1:	begin
-				wr <= 1;
-				address <= {registers[`REG_SPH],registers[`REG_SPL]}-2;
-				case (opcode[5:4])
-				`INSN_stack_AF:	wdata <= registers[`REG_F];
-				`INSN_stack_BC:	wdata <= registers[`REG_C];
-				`INSN_stack_DE:	wdata <= registers[`REG_E];
-				`INSN_stack_HL:	wdata <= registers[`REG_L];
-				endcase
-			end
+		0:	case (opcode[5:4])
+			`INSN_stack_AF:	`EXEC_WRITE(`_SP - 1, `_A)
+			`INSN_stack_BC:	`EXEC_WRITE(`_SP - 1, `_B)
+			`INSN_stack_DE:	`EXEC_WRITE(`_SP - 1, `_D)
+			`INSN_stack_HL:	`EXEC_WRITE(`_SP - 1, `_H)
+			endcase
+		1:	case (opcode[5:4])
+			`INSN_stack_AF:	`EXEC_WRITE(`_SP - 1, `_F)
+			`INSN_stack_BC:	`EXEC_WRITE(`_SP - 1, `_C)
+			`INSN_stack_DE:	`EXEC_WRITE(`_SP - 1, `_E)
+			`INSN_stack_HL:	`EXEC_WRITE(`_SP - 1, `_L)
+			endcase
 		2:	begin /* Twiddle thumbs. */ end
 		3:	begin
-				`EXEC_NEWCYCLE;
-				`EXEC_INC_PC;
+				`EXEC_NEWCYCLE
+				`EXEC_INC_PC
 			end
 		endcase
 	end
@@ -36,8 +28,7 @@
 		0:	begin /* type F */ end
 		1:	begin /* type F */ end
 		2:	begin /* type F */ end
-		3:	{registers[`REG_SPH],registers[`REG_SPL]} <=
-				{registers[`REG_SPH],registers[`REG_SPL]} - 2;
+		3:	`_SP <= `_SP - 2;
 		endcase
 	end
 `endif