Move the core to core/

[fpgaboy.git] / insn_ret-retcc.v

diff --git a/insn_ret-retcc.v b/insn_ret-retcc.v
deleted file mode 100644 (file)
index dab27c3..0000000
--- a/insn_ret-retcc.v
+++ /dev/null
@@ -1,37 +0,0 @@
-`ifdef EXECUTE
-       `INSN_RET,`INSN_RETCC: begin
-               case (cycle)
-               0:      `EXEC_READ(`_SP)
-               1:      begin   // SPECIAL CASE: cycle does NOT increase linearly with ret!
-                               `EXEC_INC_PC    // cycle 1 is skipped if we are not retcc
-                               case (opcode[4:3])
-                               `INSN_cc_NZ:    if (`_F[7])  `EXEC_NEWCYCLE
-                               `INSN_cc_Z:     if (~`_F[7]) `EXEC_NEWCYCLE
-                               `INSN_cc_NC:    if (`_F[4])  `EXEC_NEWCYCLE
-                               `INSN_cc_C:     if (~`_F[4]) `EXEC_NEWCYCLE
-                               endcase
-                               `EXEC_READ(`_SP)        // retry the read
-                       end
-               2:      `EXEC_READ(`_SP + 1)
-               3:      begin /* twiddle thumbs */ end
-               4:      `EXEC_NEWCYCLE
-               endcase
-       end
-`endif
-
-`ifdef WRITEBACK
-       `INSN_RET,`INSN_RETCC: begin
-               case (cycle)
-               0:      if (opcode[0])  // i.e., not RETCC
-                               cycle <= 1;     // Skip cycle 1; it gets incremented on the next round.
-               1:      begin /* Nothing need happen here. */ end
-               2:      `_PCL <= rdata;
-               3:      `_PCH <= rdata;
-               4:      begin
-                               `_SP <= `_SP + 2;
-                               if (opcode[4] && opcode[0])     /* RETI */
-                                       ie <= 1;
-                       end
-               endcase
-       end
-`endif