Subversion Repositories theia_gpu

`define ONE (32'h1 << `SCALE)

`timescale 1ns / 1ps

`include "aDefinitions.v"

/**********************************************************************************

Theia, Ray Cast Programable graphic Processing Unit.

Copyright (C) 2010  Diego Valverde (diego.valverde.g@gmail.com)

This program is free software; you can redistribute it and/or

modify it under the terms of the GNU General Public License

as published by the Free Software Foundation; either version 2

of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

***********************************************************************************/

//--------------------------------------------------------

module ROM

(

        input  wire[`ROM_ADDRESS_WIDTH-1:0]              Address,

        output reg [`INSTRUCTION_WIDTH-1:0]              I

);

always @( Address )

begin

                        case (Address)

//Hardcoded stuff :(

`define RAY_INSIDE_BOX                          `R3

`define CURRENT_LIGHT_POS `CREG_FIRST_LIGTH  //TODO: CAHNEG T 

`define CURRENT_LIGHT_DIFFUSE 16'h6

//-----------------------------------------------------------------

`define LABEL_DEBUG_PRINT_REGS 16'd221

`define TAG_DEBUG_LOG_REGISTERS 16'd221

`define TAG_PSU_UCODE_ADRESS2 16'd212

`define TAG_PSU_UCODE_ADRESS 16'd196

`define LABEL_TCC_EXIT 16'd195

`define TAG_TCC_UCODE_ADDRESS 16'd154

`define LABEL_BIU4 16'd153

`define LABEL_BIU3 16'd143

`define LABEL_BIU2 16'd140

`define LABEL_BIU1 16'd138

`define TAG_BIU_UCODE_ADDRESS 16'd121

`define LABEL_HIT 16'd119

`define LABEL15 16'd117

`define LABEL14 16'd115

`define LABEL13 16'd113

`define LABEL_TEST_XY_PLANE 16'd108

`define LABEL12 16'd106

`define LABEL11 16'd104

`define LABEL10 16'd102

`define LABEL_TEST_XZ_PLANE 16'd96

`define LABEL9 16'd94

`define LABEL8 16'd92

`define LABEL7 16'd90

`define LABEL_TEST_YZ_PLANE 16'd84

`define LABEL_RAY_INSIDE_BOX 16'd81

`define LABEL_ELSEZ 16'd80

`define LABEL6 16'd77

`define LABEL_ELESE_IFZ 16'd73

`define LABEL5 16'd70

`define LABEL_TEST_RAY_Z_ORIGEN 16'd66

`define LABEL_ELSEY 16'd65

`define LABEL4 16'd62

`define LABEL_ELESE_IFY 16'd58

`define LABEL3 16'd55

`define LABEL_TEST_RAY_Y_ORIGEN 16'd51

`define LABEL_ELSEX 16'd50

`define LABEL2 16'd47

`define LABEL_ELSE_IFX 16'd43

`define LABEL1 16'd40

`define LABEL_TEST_RAY_X_ORIGEN 16'd36

`define TAG_AABBIU_UCODE_ADDRESS 16'd33

`define LABEL_NPG_NEXT_ROW 16'd30

`define TAG_NPG_UCODE_ADDRESS 16'd24

`define TAG_RGU_UCODE_ADDRESS 16'd17

`define TAG_CPPU_UCODE_ADDRESS 16'd14

//This is the Code that loads in THEIAs ROM

//-------------------------------------------------------------------------

//Default values for some registers after reset

0: I = { `ZERO ,`CREG_LAST_t ,`VOID ,`VOID };

 //Set the last 't' to very positive value(500) 

1: I = { `SETX ,`CREG_LAST_t ,32'h1F40000  };

2: I = { `ZERO ,`OREG_PIXEL_COLOR ,`VOID ,`VOID };

3: I =  { `NOP ,`RT_FALSE   }; //{ `ZERO ,`CREG_PIXEL_2D_POSITION ,`VOID ,`VOID }; 

4: I = { `ZERO ,`OREG_PIXEL_PITCH ,`VOID,`VOID};

5: I = { `ZERO ,`R1 ,`VOID ,`VOID };

6: I = { `ZERO ,`R2 ,`VOID ,`VOID };

7: I = { `ZERO ,`R3 ,`VOID ,`VOID };

8: I = { `ZERO ,`R4 ,`VOID ,`VOID };

9: I = { `ZERO ,`R5 ,`VOID ,`VOID };

 //Harode texture size for now ...

10: I = { `NOP ,`RT_FALSE   };//{ `SETX ,`CREG_TEXTURE_SIZE ,32'h1FE0000  }; 

11: I = { `NOP ,`RT_FALSE   };//{ `SETY ,`CREG_TEXTURE_SIZE ,32'h1FE0000  }; 

12: I = { `NOP ,`RT_FALSE   };//{ `SETZ ,`CREG_TEXTURE_SIZE ,32'h1FE0000  }; 

13: I = { `RETURN ,`RT_TRUE   };

//----------------------------------------------------------------------          

//Micro code for CPPU

//TAG_CPPU_UCODE_ADDRESS:

14: I = { `SUB ,`R1 ,`CREG_PROJECTION_WINDOW_MAX ,`CREG_PROJECTION_WINDOW_MIN };

15: I = { `DIV ,`CREG_PROJECTION_WINDOW_SCALE ,`R1 ,`CREG_RESOLUTION };

16: I = { `RETURN ,`RT_FALSE   };

//----------------------------------------------------------------------          

//Micro code for RGU

//TAG_RGU_UCODE_ADDRESS:

17: I = { `MUL ,`R1 ,`CREG_PIXEL_2D_POSITION ,`CREG_PROJECTION_WINDOW_SCALE };

18: I = { `ADD ,`R1 ,`R1 ,`CREG_PROJECTION_WINDOW_MIN };

19: I = { `SUB ,`CREG_UNORMALIZED_DIRECTION ,`R1 ,`CREG_CAMERA_POSITION };

20: I = { `MAG ,`R2 ,`CREG_UNORMALIZED_DIRECTION ,`VOID };

21: I = { `DIV ,`CREG_RAY_DIRECTION ,`CREG_UNORMALIZED_DIRECTION ,`R2 };

22: I = { `DEC,`CREG_LAST_COL,`CREG_RESOLUTION,`VOID};//{ `ZERO ,`R3 ,`VOID ,`VOID }; 

23: I = { `RETURN ,`RT_FALSE   };

//----------------------------------------------------------------------

//Next Pixel generation Code (NPG)

//TAG_NPG_UCODE_ADDRESS:

24: I = { `ZERO ,`R1 ,`VOID ,`VOID };

25: I = { `SETX ,`R1 ,32'h00003  };

26: I = { `ADD ,`OREG_PIXEL_PITCH ,`OREG_PIXEL_PITCH ,`R1 };

27: I = { `JEQX ,`LABEL_NPG_NEXT_ROW ,`CREG_PIXEL_2D_POSITION ,`CREG_LAST_COL }; //HERE WE ARE CALCULATING ELEMENT 200 :(

28: I = { `INCX ,`CREG_PIXEL_2D_POSITION ,`CREG_PIXEL_2D_POSITION ,`VOID };

29: I = { `RETURN ,`RT_TRUE   };

//LABEL_NPG_NEXT_ROW:

30: I = { `SETX ,`CREG_PIXEL_2D_POSITION ,32'h0  };

31: I = { `INCY ,`CREG_PIXEL_2D_POSITION ,`CREG_PIXEL_2D_POSITION,`VOID  };

32: I = { `RETURN ,`RT_TRUE   };

//----------------------------------------------------------------------

//Micro code for AABBIU

//TAG_AABBIU_UCODE_ADDRESS:

33: I = { `ZERO ,`R3 ,`VOID ,`VOID };

34: I = { `ZERO ,`R5 ,`VOID ,`VOID };

35: I = { `NOP ,`RT_FALSE   };

//LABEL_TEST_RAY_X_ORIGEN:

36: I = { `JGEX ,`LABEL_ELSE_IFX ,`CREG_CAMERA_POSITION ,`CREG_AABBMIN };

37: I = { `SUB ,`R1 ,`CREG_AABBMIN ,`CREG_CAMERA_POSITION };

38: I = { `JLEX ,`LABEL1 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

39: I = { `RETURN ,`RT_FALSE   };

//LABEL1:

40: I = { `SETX ,`RAY_INSIDE_BOX ,32'd0  };

41: I = { `DIV ,`R6 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

42: I = { `JMP ,`LABEL_TEST_RAY_Y_ORIGEN ,`VOID ,`VOID };

//LABEL_ELSE_IFX:

43: I = { `JLEX ,`LABEL_ELSEX ,`CREG_CAMERA_POSITION ,`CREG_AABBMAX };

44: I = { `SUB ,`R1 ,`CREG_AABBMAX ,`CREG_CAMERA_POSITION };

45: I = { `JGEX ,`LABEL2 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

46: I = { `RETURN ,`RT_FALSE   };

//LABEL2:

47: I = { `SETX ,`RAY_INSIDE_BOX ,32'd0  };

48: I = { `DIV ,`R6 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

49: I = { `JMP ,`LABEL_TEST_RAY_Y_ORIGEN ,`VOID ,`VOID };

//LABEL_ELSEX:

50: I = { `SETX ,`R5 ,32'b1  };

//LABEL_TEST_RAY_Y_ORIGEN:

51: I = { `JGEY ,`LABEL_ELESE_IFY ,`CREG_CAMERA_POSITION ,`CREG_AABBMIN };

52: I = { `SUB ,`R1 ,`CREG_AABBMIN ,`CREG_CAMERA_POSITION };

53: I = { `JLEY ,`LABEL3 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

54: I = { `RETURN ,`RT_FALSE   };

//LABEL3:

55: I = { `SETX ,`RAY_INSIDE_BOX ,32'd0  };

56: I = { `DIV ,`R6 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

57: I = { `JMP ,`LABEL_TEST_RAY_Z_ORIGEN ,`VOID ,`VOID };

//LABEL_ELESE_IFY:

58: I = { `JLEY ,`LABEL_ELSEY ,`CREG_CAMERA_POSITION ,`CREG_AABBMAX };

59: I = { `SUB ,`R1 ,`CREG_AABBMAX ,`CREG_CAMERA_POSITION };

60: I = { `JGEY ,`LABEL4 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

61: I = { `RETURN ,`RT_FALSE   };

//LABEL4:

62: I = { `SETX ,`RAY_INSIDE_BOX ,32'd0  };

63: I = { `DIV ,`R6 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

64: I = { `JMP ,`LABEL_TEST_RAY_Z_ORIGEN ,`VOID ,`VOID };

//LABEL_ELSEY:

65: I = { `SETY ,`R5 ,32'b1  };

//LABEL_TEST_RAY_Z_ORIGEN:

66: I = { `JGEZ ,`LABEL_ELESE_IFZ ,`CREG_CAMERA_POSITION ,`CREG_AABBMIN };

67: I = { `SUB ,`R1 ,`CREG_AABBMIN ,`CREG_CAMERA_POSITION };

68: I = { `JLEZ ,`LABEL5 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

69: I = { `RETURN ,`RT_FALSE   };

//LABEL5:

70: I = { `SETX ,`RAY_INSIDE_BOX ,32'd0  };

71: I = { `DIV ,`R6 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

72: I = { `JMP ,`LABEL_RAY_INSIDE_BOX ,`VOID ,`VOID };

//LABEL_ELESE_IFZ:

73: I = { `JLEZ ,`LABEL_ELSEZ ,`CREG_CAMERA_POSITION ,`CREG_AABBMAX };

74: I = { `SUB ,`R1 ,`CREG_AABBMAX ,`CREG_CAMERA_POSITION };

75: I = { `JGEZ ,`LABEL6 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

76: I = { `RETURN ,`RT_FALSE   };

//LABEL6:

77: I = { `SETX ,`RAY_INSIDE_BOX ,32'd0  };

78: I = { `DIV ,`R6 ,`R1 ,`CREG_UNORMALIZED_DIRECTION };

79: I = { `JMP ,`LABEL_RAY_INSIDE_BOX ,`VOID ,`VOID };

//LABEL_ELSEZ:

80: I = { `SETZ ,`R5 ,32'b1  };

//LABEL_RAY_INSIDE_BOX:

81: I = { `ZERO ,`R1 ,`VOID ,`VOID };

82: I = { `JEQX ,`LABEL_TEST_YZ_PLANE ,`R1 ,`RAY_INSIDE_BOX };

83: I = { `RETURN ,`RT_TRUE   };

//LABEL_TEST_YZ_PLANE:

84: I = { `JNEX ,`LABEL_TEST_XZ_PLANE ,`R5 ,`R1 };

85: I = { `SWIZZLE3D ,`R6 ,`SWIZZLE_XXX  };

86: I = { `MUL ,`R2 ,`CREG_UNORMALIZED_DIRECTION ,`R6 };

87: I = { `ADD ,`R2 ,`R2 ,`CREG_CAMERA_POSITION };

88: I = { `JGEY ,`LABEL7 ,`R2 ,`CREG_AABBMIN };

89: I = { `RETURN ,`RT_FALSE   };

//LABEL7:

90: I = { `JLEY ,`LABEL8 ,`R2 ,`CREG_AABBMAX };

91: I = { `RETURN ,`RT_FALSE   };

//LABEL8:

92: I = { `JGEZ ,`LABEL9 ,`R2 ,`CREG_AABBMIN };

93: I = { `RETURN ,`RT_FALSE   };

//LABEL9:

94: I = { `JLEZ ,`LABEL_TEST_XZ_PLANE ,`R2 ,`CREG_AABBMAX };

95: I = { `RETURN ,`RT_FALSE   };

//LABEL_TEST_XZ_PLANE:

96: I = { `JNEY ,`LABEL_TEST_XY_PLANE ,`R5 ,`R1 };

97: I = { `SWIZZLE3D ,`R6 ,`SWIZZLE_YYY  };

98: I = { `MUL ,`R2 ,`CREG_UNORMALIZED_DIRECTION ,`R6 };

99: I = { `ADD ,`R2 ,`R2 ,`CREG_CAMERA_POSITION };

100: I = { `JGEX ,`LABEL10 ,`R2 ,`CREG_AABBMIN };

101: I = { `RETURN ,`RT_FALSE   };

//LABEL10:

102: I = { `JLEX ,`LABEL11 ,`R2 ,`CREG_AABBMAX };

103: I = { `RETURN ,`RT_FALSE   };

//LABEL11:

104: I = { `JGEZ ,`LABEL12 ,`R2 ,`CREG_AABBMIN };

105: I = { `RETURN ,`RT_FALSE   };

//LABEL12:

106: I = { `JLEZ ,`LABEL_TEST_XY_PLANE ,`R2 ,`CREG_AABBMAX };

107: I = { `RETURN ,`RT_FALSE   };

//LABEL_TEST_XY_PLANE:

108: I = { `SWIZZLE3D ,`R6 ,`SWIZZLE_ZZZ  };

109: I = { `MUL ,`R2 ,`CREG_UNORMALIZED_DIRECTION ,`R6 };

110: I = { `ADD ,`R2 ,`R2 ,`CREG_CAMERA_POSITION };

111: I = { `JGEX ,`LABEL13 ,`R2 ,`CREG_AABBMIN };

112: I = { `RETURN ,`RT_FALSE   };

//LABEL13:

113: I = { `JLEX ,`LABEL14 ,`R2 ,`CREG_AABBMAX };

114: I = { `RETURN ,`RT_FALSE   };

//LABEL14:

115: I = { `JGEY ,`LABEL15 ,`R2 ,`CREG_AABBMIN };

116: I = { `RETURN ,`RT_FALSE   };

//LABEL15:

117: I = { `JLEY ,`LABEL_HIT ,`R2 ,`CREG_AABBMAX };

118: I = { `RETURN ,`RT_FALSE   };

//LABEL_HIT:

119: I = { `SETX ,`CREG_LAST_t ,32'h1F40000  };

120: I = { `RETURN ,`RT_TRUE   };

 //------------------------------------------------------------------------

 //BIU Micro code

//TAG_BIU_UCODE_ADDRESS:

121: I = { `ZERO ,`OREG_PIXEL_COLOR ,`VOID ,`VOID };

122: I = { `SETX ,`R3 ,`ONE  };

123: I = { `SETX ,`R1 ,32'h00000  };

124: I = { `SUB ,`CREG_E1 ,`CREG_V1 ,`CREG_V0 };

125: I = { `SUB ,`CREG_E2 ,`CREG_V2 ,`CREG_V0 };

126: I = { `SUB ,`CREG_T ,`CREG_CAMERA_POSITION ,`CREG_V0 };

127: I = { `CROSS ,`CREG_P ,`CREG_RAY_DIRECTION ,`CREG_E2 };

128: I = { `CROSS ,`CREG_Q ,`CREG_T ,`CREG_E1 };

129: I = { `DOT ,`CREG_H1 ,`CREG_Q ,`CREG_E2 };

130: I = { `DOT ,`CREG_H2 ,`CREG_P ,`CREG_T };

131: I = { `DOT ,`CREG_H3 ,`CREG_Q ,`CREG_RAY_DIRECTION };

132: I = { `DOT ,`CREG_DELTA ,`CREG_P ,`CREG_E1 };

133: I = { `DIV ,`CREG_t ,`CREG_H1 ,`CREG_DELTA };

134: I = { `DIV ,`CREG_u ,`CREG_H2 ,`CREG_DELTA };

135: I = { `DIV ,`CREG_v ,`CREG_H3 ,`CREG_DELTA };

136: I = { `JGEX ,`LABEL_BIU1 ,`CREG_u ,`R1 };

137: I = { `RETURN ,`RT_FALSE   };

//LABEL_BIU1:

138: I = { `JGEX ,`LABEL_BIU2 ,`CREG_v ,`R1 };

139: I = { `RETURN ,`RT_FALSE   };

//LABEL_BIU2:

140: I = { `ADD ,`R2 ,`CREG_u ,`CREG_v };

141: I = { `JLEX ,`LABEL_BIU3 ,`R2 ,`R3 };

142: I = { `RETURN ,`RT_FALSE   };

//LABEL_BIU3:

143: I = { `JGEX ,`LABEL_BIU4 ,`CREG_t ,`CREG_LAST_t };

144: I = { `COPY ,`CREG_LAST_t ,`CREG_t ,`VOID };

145: I = { `COPY ,`CREG_LAST_u ,`CREG_u ,`VOID };

146: I = { `COPY ,`CREG_LAST_v ,`CREG_v ,`VOID };

147: I = { `COPY ,`CREG_E1_LAST ,`CREG_E1 ,`VOID };

148: I = { `COPY ,`CREG_E2_LAST ,`CREG_E2 ,`VOID };

149: I = { `COPY ,`CREG_UV0_LAST ,`CREG_UV0 ,`VOID };

150: I = { `COPY ,`CREG_UV1_LAST ,`CREG_UV1 ,`VOID };

151: I = { `COPY ,`CREG_UV2_LAST ,`CREG_UV2 ,`VOID };

152: I = { `COPY ,`CREG_TRI_DIFFUSE_LAST ,`CREG_TRI_DIFFUSE ,`VOID };

//LABEL_BIU4:

153: I = { `RETURN ,`RT_TRUE   };

//-------------------------------------------------------------------------

//Calculate the adress of the texure coordiantes.

//TAG_TCC_UCODE_ADDRESS:

//Do this calculation only if this triangle is the one closest to the camera

154: I = { `JGX ,`LABEL_TCC_EXIT ,`CREG_t ,`CREG_LAST_t };

//First get the UV coodrinates and store in R1

//R1x: u_coordinate = U0 + last_u * (U1 - U0) + last_v * (U2 - U0);

//R1y: v_coordinate = V0 + last_u * (V1 - V0) + last_v * (V2 - V0);

//R1z: 0

155: I = { `SUB ,`R1 ,`CREG_UV1_LAST ,`CREG_UV0_LAST };

156: I = { `SUB ,`R2 ,`CREG_UV2_LAST ,`CREG_UV0_LAST };

157: I = { `MUL ,`R1 ,`CREG_LAST_u ,`R1 };

158: I = { `MUL ,`R2 ,`CREG_LAST_v ,`R2 };

159: I = { `ADD ,`R1 ,`R1 ,`R2 };

160: I = { `ADD ,`R1 ,`R1 ,`CREG_UV0 };

//R7x : fu = (u_coordinate) * gTexture.mWidth;

//R7y : fv = (v_coordinate) * gTexture.mWidth;

//R7z : 0

161: I = { `MUL ,`R7 ,`R1 ,`CREG_TEXTURE_SIZE };

//R1x: u1 = ((int)fu) % gTexture.mWidth;

//R1y: v1 = ((int)fv) % gTexture.mHeight;

//R1z: 0

//R2x: u2 = (u1 + 1 ) % gTexture.mWidth;

//R2y: v2 = (v2 + 1 ) % gTexture.mHeight;

//R2z: 0

// Notice MOD2 only operates over

// numbers that are power of 2, also notice that the

// textures are assumed to be squares!

//x % 2^n == x & (2^n - 1).

162: I = { `MOD ,`R1 ,`R7 ,`CREG_TEXTURE_SIZE };

163: I = { `INC ,`R2 ,`R1 ,`VOID };

164: I = { `MOD ,`R2 ,`R2 ,`CREG_TEXTURE_SIZE };

//Cool, now we should store the values in the appropiate registers

//OREG_TEX_COORD1.x = u1 + v1 * gTexture.mWidth

//OREG_TEX_COORD1.y = u2 + v1 * gTexture.mWidth

//OREG_TEX_COORD1.z = 0

//OREG_TEX_COORD2.x = u1 + v2 * gTexture.mWidth

//OREG_TEX_COORD2.y = u2 + v2 * gTexture.mWidth

//OREG_TEX_COORD1.z = 0

//R1= [u1, v1, 0]

//R2= [u2, v2, 0]

//R2 = [v2, u2, 0]

165: I = { `SWIZZLE3D ,`R2 ,`SWIZZLE_YXZ  };

//R3 = [v2 v1 0]

166: I = { `XCHANGEX ,`R3 ,`R1 ,`R2 };

//R4 = [u1, u2 0]

167: I = { `XCHANGEX ,`R4 ,`R2 ,`R1 };

//R2 = [v2*H, v1*H, 0]

//R2 = FixedToInteger(R3*CREG_TEXTURE_SIZE)

168: I = { `UNSCALE ,`R9 ,`R3 ,`VOID };

169: I = { `UNSCALE ,`R8 ,`CREG_TEXTURE_SIZE ,`VOID };

170: I = { `IMUL ,`R2 ,`R9 ,`R8 };

//OREG_TEX_COORD1 = [u1 + v2*H, u2 + v1*H, 0]

//R4 = FixedToIinteger(R4)

171: I = { `UNSCALE ,`R4 ,`R4 ,`VOID };

172: I = { `ADD ,`OREG_TEX_COORD1 ,`R2 ,`R4 };

173: I = { `SETX ,`R5 ,32'h3  };

174: I = { `SETY ,`R5 ,32'h3  };

175: I = { `SETZ ,`R5 ,32'h3  };

//Multiply by 3 (the pitch)

176: I = { `IMUL ,`OREG_TEX_COORD1 ,`OREG_TEX_COORD1 ,`R5 };

//R4 = [u2 u1 0]

177: I = { `SWIZZLE3D ,`R4 ,`SWIZZLE_YXZ  };

//OREG_TEX_COORD2 [u2 + v2*H, u1 + v1*H, 0]

178: I = { `ADD ,`OREG_TEX_COORD2 ,`R2 ,`R4 };

//Multiply by 3 (the pitch)

179: I = { `IMUL ,`OREG_TEX_COORD2 ,`OREG_TEX_COORD2 ,`R5 };

//Cool now get the weights

//w1 = (1 - fracu) * (1 - fracv);

//w2 = fracu * (1 - fracv);

//w3 = (1 - fracu) * fracv;

//w4 = fracu *  fracv;

//R4x: fracu 

//R4y: fracv 

//R4z: 0

180: I = { `FRAC ,`R4 ,`R7 ,`VOID };

//R5x: fracv 

//R5y: fracu 

//R5z: 0 

181: I = { `COPY ,`R5 ,`R4 ,`VOID };

182: I = { `SWIZZLE3D ,`R5 ,`SWIZZLE_YXZ  };

//R5x: 1 - fracv 

//R5y: 1 - fracu 

//R5y: 1

183: I = { `NEG ,`R5 ,`R5 ,`VOID };

184: I = { `INC ,`R5 ,`R5 ,`VOID };

//R5x: 1 - fracv 

//R5y: 1 - fracu 

//R5y: (1 - fracv)(1 - fracu) 

185: I = { `MULP ,`OREG_TEXWEIGHT1 ,`R5 ,`VOID };

//OREG_TEXWEIGHT1.x = (1 - fracv)(1 - fracu) 

//OREG_TEXWEIGHT1.y = (1 - fracv)(1 - fracu) 

//OREG_TEXWEIGHT1.z = (1 - fracv)(1 - fracu) 

186: I = { `SWIZZLE3D ,`OREG_TEXWEIGHT1 ,`SWIZZLE_ZZZ  };

//R6x: w2: fracu * (1 - fracv )

//R6y: w3: fracv * (1 - fracu )

//R6z: 0

187: I = { `MUL ,`R6 ,`R4 ,`R5 };

//OREG_TEXWEIGHT2.x = fracu * (1 - fracv )

//OREG_TEXWEIGHT2.y = fracu * (1 - fracv )

//OREG_TEXWEIGHT2.z = fracu * (1 - fracv )

188: I = { `COPY ,`OREG_TEXWEIGHT2 ,`R6 ,`VOID };

189: I = { `SWIZZLE3D ,`OREG_TEXWEIGHT2 ,`SWIZZLE_XXX  };

//OREG_TEXWEIGHT3.x = fracv * (1 - fracu )

//OREG_TEXWEIGHT3.y = fracv * (1 - fracu )

//OREG_TEXWEIGHT3.z = fracv * (1 - fracu )

190: I = { `COPY ,`OREG_TEXWEIGHT3 ,`R6 ,`VOID };

191: I = { `SWIZZLE3D ,`OREG_TEXWEIGHT3 ,`SWIZZLE_YYY  };

//R4x: fracu

//R4y: fracv

//R4z: fracu * fracv

192: I = { `MULP ,`R4 ,`R4 ,`VOID };

//OREG_TEXWEIGHT4.x = fracv * fracu 

//OREG_TEXWEIGHT4.y = fracv * fracu 

//OREG_TEXWEIGHT4.z = fracv * fracu 

193: I = { `COPY ,`OREG_TEXWEIGHT4 ,`R4 ,`VOID };

194: I = { `SWIZZLE3D ,`OREG_TEXWEIGHT4 ,`SWIZZLE_ZZZ  };

//LABEL_TCC_EXIT:

195: I = { `RETURN ,`RT_TRUE   };

//-------------------------------------------------------------------------

//TAG_PSU_UCODE_ADRESS:

//Pixel Shader #1

//This pixel shader has diffuse light but no textures

196: I = { `CROSS ,`R1 ,`CREG_E1_LAST ,`CREG_E2_LAST };

197: I = { `MAG ,`R2 ,`R1 ,`VOID };

198: I = { `DIV ,`R1 ,`R1 ,`R2 };

199: I = { `MUL ,`R2 ,`CREG_RAY_DIRECTION ,`CREG_LAST_t };

200: I = { `ADD ,`R2 ,`R2 ,`CREG_CAMERA_POSITION };

201: I = { `SUB ,`R2 ,`CURRENT_LIGHT_POS ,`R2 };

202: I = { `MAG ,`R3 ,`R2 ,`VOID };

203: I = { `DIV ,`R2 ,`R2 ,`R3 };

204: I = { `DOT ,`R3 ,`R2 ,`R1 };

205: I = { `MUL ,`COLOR_ACC ,`CREG_TRI_DIFFUSE_LAST ,`CURRENT_LIGHT_DIFFUSE };

206: I = { `MUL ,`COLOR_ACC ,`COLOR_ACC ,`R3 };

207: I = { `COPY ,`OREG_PIXEL_COLOR ,`COLOR_ACC ,`VOID };

208: I = { `JLEX ,`LABEL_DEBUG_PRINT_REGS ,`COLOR_ACC ,`R3 };

209: I = { `JMP ,`LABEL_DEBUG_PRINT_REGS ,`VOID ,`VOID };

210: I = { `NOP ,`RT_FALSE   };//{ `INC ,`OREG_PIXEL_PITCH ,`VOID  }; 

211: I = { `RETURN ,`RT_TRUE   };

//-------------------------------------------------------------------------

//Pixel Shader #2

//TAG_PSU_UCODE_ADRESS2:

//This Pixel Shader has no light but it does texturinng 

//with bi-linear interpolation

//CColor TextureColor;

//TextureColor.R = c1.R * w1 + c2.R * w2 + c3.R * w3 + c4.R * w4;

//TextureColor.G = c1.G * w1 + c2.G * w2 + c3.G * w3 + c4.G * w4;

//TextureColor.B = c1.B * w1 + c2.B * w2 + c3.B * w3 + c4.B * w4;

212: I = { `MUL ,`R1 ,`CREG_TEX_COLOR5 ,`OREG_TEXWEIGHT1 };

213: I = { `MUL ,`R2 ,`CREG_TEX_COLOR2 ,`OREG_TEXWEIGHT2 };

214: I = { `MUL ,`R3 ,`CREG_TEX_COLOR1 ,`OREG_TEXWEIGHT3 };

215: I = { `MUL ,`R4 ,`CREG_TEX_COLOR4 ,`OREG_TEXWEIGHT4 };

216: I = { `ADD ,`OREG_PIXEL_COLOR ,`R1 ,`R2 };

217: I = { `ADD ,`OREG_PIXEL_COLOR ,`OREG_PIXEL_COLOR ,`R3 };

218: I = { `ADD ,`OREG_PIXEL_COLOR ,`OREG_PIXEL_COLOR ,`R4 };

219: I = { `RETURN ,`RT_TRUE   }; //{ `INC ,`OREG_PIXEL_PITCH ,`VOID  }; 

220: I = { `RETURN ,`RT_TRUE   };

//-------------------------------------------------------------------------

//Debug Code

//TAG_DEBUG_LOG_REGISTERS:

//LABEL_DEBUG_PRINT_REGS:

/*

221: I = { `DEBUG_PRINT ,`CREG_PIXEL_2D_POSITION ,`CREG_PIXEL_2D_POSITION ,`VOID };

222: I = { `DEBUG_PRINT ,`COLOR_ACC ,`COLOR_ACC ,`VOID };

223: I = { `DEBUG_PRINT ,`CREG_LAST_t ,`CREG_LAST_t ,`VOID };

224: I = { `DEBUG_PRINT ,`CREG_E1_LAST ,`CREG_E1_LAST ,`VOID };

225: I = { `DEBUG_PRINT ,`CREG_E2_LAST ,`CREG_E2_LAST ,`VOID };

226: I = { `DEBUG_PRINT ,`CREG_RAY_DIRECTION ,`CREG_RAY_DIRECTION ,`VOID };

227: I = { `DEBUG_PRINT ,`CREG_CAMERA_POSITION ,`CREG_CAMERA_POSITION ,`VOID };

228: I = { `DEBUG_PRINT ,`CREG_V0 ,`CREG_V0 ,`VOID };

229: I = { `DEBUG_PRINT ,`CREG_V1 ,`CREG_V1 ,`VOID };

230: I = { `DEBUG_PRINT ,`CREG_V2 ,`CREG_V2 ,`VOID };

231: I = { `RETURN ,`RT_TRUE   };

*/

//-------------------------------------------------------------------------             

                        default:

                        begin

                        `ifdef DEBUG

                        $display("Error: Reached undefined address in instruction Memory: %d!!!!",Address);

                        $stop();

                        `endif

                        I = {`INSTRUCTION_OP_LENGTH'hFF,16'hFFFF,32'hFFFFFFFF};

                        end

                        endcase

        end

endmodule

//--------------------------------------------------------