New generation makefile. Code that will reliably break the machine.

[fpgaboy.git] / GBZ80Core.v

diff --git a/GBZ80Core.v b/GBZ80Core.v
index e0857397709655af2e502193b040a6db051c117c..f4383397978f92fd5539f45dd90b7c40ee1415fd 100644 (file)
--- a/GBZ80Core.v
+++ b/GBZ80Core.v
@@ -11,6 +11,25 @@
 `define REG_PCH        10
 `define REG_PCL        11
 
+`define _A     registers[`REG_A]
+`define _B     registers[`REG_B]
+`define _C     registers[`REG_C]
+`define _D     registers[`REG_D]
+`define _E     registers[`REG_E]
+`define _F     registers[`REG_F]
+`define _H     registers[`REG_H]
+`define _L     registers[`REG_L]
+`define _SPH   registers[`REG_SPH]
+`define _SPL   registers[`REG_SPL]
+`define _PCH   registers[`REG_PCH]
+`define _PCL   registers[`REG_PCL]
+`define _AF    {`_A, `_F}
+`define _BC    {`_B, `_C}
+`define _DE    {`_D, `_E}
+`define _HL    {`_H, `_L}
+`define _SP    {`_SPH, `_SPL}
+`define _PC    {`_PCH, `_PCL}
+
 `define FLAG_Z 8'b10000000
 `define FLAG_N 8'b01000000
 `define FLAG_H 8'b00100000
@@ -88,6 +107,12 @@
 `define INSN_alu_SCF           3'b110
 `define INSN_alu_CCF           3'b111
 
+`define EXEC_INC_PC            `_PC <= `_PC + 1;
+`define EXEC_NEXTADDR_PCINC    address <= `_PC + 1;
+`define EXEC_NEWCYCLE          begin newcycle <= 1; rd <= 1; wr <= 0; end
+`define EXEC_WRITE(ad, da)     begin address <= (ad); wdata <= (da); wr <= 1; end end
+`define EXEC_READ(ad)          begin address <= (ad); rd <= 1; end end
+
 module GBZ80Core(
        input clk,
        output reg [15:0] busaddress,   /* BUS_* is latched on STATE_FETCH. */
@@ -184,24 +209,10 @@ module GBZ80Core(
                        state <= `STATE_EXECUTE;
                end
                `STATE_EXECUTE: begin
-`define EXEC_INC_PC \
-       {registers[`REG_PCH], registers[`REG_PCL]} <= {registers[`REG_PCH], registers[`REG_PCL]} + 1
-`define EXEC_NEXTADDR_PCINC \
-       address <= {registers[`REG_PCH], registers[`REG_PCL]} + 1
-`define EXEC_NEWCYCLE \
-       newcycle <= 1; rd <= 1; wr <= 0
                        casex (opcode)
                        `define EXECUTE
                        `include "allinsns.v"
                        `undef EXECUTE
-                       `INSN_DI: begin
-                               `EXEC_NEWCYCLE;
-                               `EXEC_INC_PC;
-                       end
-                       `INSN_EI: begin
-                               `EXEC_NEWCYCLE;
-                               `EXEC_INC_PC;
-                       end
                        default:
                                $stop;
                        endcase