src/gallium/drivers/nvfx/nv30_vertprog.h

   1 #ifndef __NV30_SHADER_H__
   2 #define __NV30_SHADER_H__
   3
   4 /* Vertex programs instruction set
   5  *
   6  * 128bit opcodes, split into 4 32-bit ones for ease of use.
   7  *
   8  * Non-native instructions
   9  *   ABS - MOV + NV40_VP_INST0_DEST_ABS
  10  *   POW - EX2 + MUL + LG2
  11  *   SUB - ADD, second source negated
  12  *   SWZ - MOV
  13  *   XPD -
  14  *
  15  * Register access
  16  *   - Only one INPUT can be accessed per-instruction (move extras into TEMPs)
  17  *   - Only one CONST can be accessed per-instruction (move extras into TEMPs)
  18  *
  19  * Relative Addressing
  20  *   According to the value returned for
  21  *   MAX_PROGRAM_NATIVE_ADDRESS_REGISTERS_ARB
  22  *
  23  *   there are only two address registers available.  The destination in the
  24  *   ARL instruction is set to TEMP <n> (The temp isn't actually written).
  25  *
  26  *   When using vanilla ARB_v_p, the proprietary driver will squish both the
  27  *   available ADDRESS regs into the first hardware reg in the X and Y
  28  *   components.
  29  *
  30  *   To use an address reg as an index into consts, the CONST_SRC is set to
  31  *   (const_base + offset) and INDEX_CONST is set.
  32  *
  33  *   To access the second address reg use ADDR_REG_SELECT_1. A particular
  34  *   component of the address regs is selected with ADDR_SWZ.
  35  *
  36  *   Only one address register can be accessed per instruction.
  37  *
  38  * Conditional execution (see NV_vertex_program{2,3} for details) Conditional
  39  * execution of an instruction is enabled by setting COND_TEST_ENABLE, and
  40  * selecting the condition which will allow the test to pass with
  41  * COND_{FL,LT,...}.  It is possible to swizzle the values in the condition
  42  * register, which allows for testing against an individual component.
  43  *
  44  * Branching:
  45  *
  46  *   The BRA/CAL instructions seem to follow a slightly different opcode
  47  *   layout.  The destination instruction ID (IADDR) overlaps a source field.
  48  *   Instruction ID's seem to be numbered based on the UPLOAD_FROM_ID FIFO
  49  *   command, and is incremented automatically on each UPLOAD_INST FIFO
  50  *   command.
  51  *
  52  *   Conditional branching is achieved by using the condition tests described
  53  *   above.  There doesn't appear to be dedicated looping instructions, but
  54  *   this can be done using a temp reg + conditional branching.
  55  *
  56  *   Subroutines may be uploaded before the main program itself, but the first
  57  *   executed instruction is determined by the PROGRAM_START_ID FIFO command.
  58  *
  59  */
  60
  61 /* DWORD 0 */
  62
  63 #define NV30_VP_INST_ADDR_REG_SELECT_1        (1 << 24)
  64 #define NV30_VP_INST_SRC2_ABS           (1 << 23) /* guess */
  65 #define NV30_VP_INST_SRC1_ABS           (1 << 22) /* guess */
  66 #define NV30_VP_INST_SRC0_ABS           (1 << 21) /* guess */
  67 #define NV30_VP_INST_VEC_RESULT         (1 << 20)
  68 #define NV30_VP_INST_DEST_TEMP_ID_SHIFT        16
  69 #define NV30_VP_INST_DEST_TEMP_ID_MASK        (0x0F << 16)
  70 #define NV30_VP_INST_COND_UPDATE_ENABLE        (1<<15)
  71 #define NV30_VP_INST_VEC_DEST_TEMP_MASK      (0xF << 16)
  72 #define NV30_VP_INST_COND_TEST_ENABLE        (1<<14)
  73 #define NV30_VP_INST_COND_SHIFT          11
  74 #define NV30_VP_INST_COND_MASK          (0x07 << 11)
  75 #define NV30_VP_INST_COND_SWZ_X_SHIFT        9
  76 #define NV30_VP_INST_COND_SWZ_X_MASK        (0x03 <<  9)
  77 #define NV30_VP_INST_COND_SWZ_Y_SHIFT        7
  78 #define NV30_VP_INST_COND_SWZ_Y_MASK        (0x03 <<  7)
  79 #define NV30_VP_INST_COND_SWZ_Z_SHIFT        5
  80 #define NV30_VP_INST_COND_SWZ_Z_MASK        (0x03 <<  5)
  81 #define NV30_VP_INST_COND_SWZ_W_SHIFT        3
  82 #define NV30_VP_INST_COND_SWZ_W_MASK        (0x03 <<  3)
  83 #define NV30_VP_INST_COND_SWZ_ALL_SHIFT        3
  84 #define NV30_VP_INST_COND_SWZ_ALL_MASK        (0xFF <<  3)
  85 #define NV30_VP_INST_ADDR_SWZ_SHIFT        1
  86 #define NV30_VP_INST_ADDR_SWZ_MASK        (0x03 <<  1)
  87 #define NV30_VP_INST_SCA_OPCODEH_SHIFT        0
  88 #define NV30_VP_INST_SCA_OPCODEH_MASK        (0x01 <<  0)
  89
  90 /* DWORD 1 */
  91 #define NV30_VP_INST_SCA_OPCODEL_SHIFT        28
  92 #define NV30_VP_INST_SCA_OPCODEL_MASK        (0x0F << 28)
  93 #define NV30_VP_INST_VEC_OPCODE_SHIFT        23
  94 #define NV30_VP_INST_VEC_OPCODE_MASK        (0x1F << 23)
  95 #define NV30_VP_INST_CONST_SRC_SHIFT        14
  96 #define NV30_VP_INST_CONST_SRC_MASK        (0xFF << 14)
  97 #define NV30_VP_INST_INPUT_SRC_SHIFT        9    /*NV20*/
  98 #define NV30_VP_INST_INPUT_SRC_MASK        (0x0F <<  9)  /*NV20*/
  99 #define NV30_VP_INST_SRC0H_SHIFT        0    /*NV20*/
 100 #define NV30_VP_INST_SRC0H_MASK          (0x1FF << 0)  /*NV20*/
 101
 102 /* Please note: the IADDR fields overlap other fields because they are used
 103  * only for branch instructions.  See Branching: label above
 104  *
 105  * DWORD 2
 106  */
 107 #define NV30_VP_INST_SRC0L_SHIFT        26    /*NV20*/
 108 #define NV30_VP_INST_SRC0L_MASK         (0x3F  <<26)  /* NV30_VP_SRC0_LOW_MASK << 26 */
 109 #define NV30_VP_INST_SRC1_SHIFT         11    /*NV20*/
 110 #define NV30_VP_INST_SRC1_MASK          (0x7FFF<<11)  /*NV20*/
 111 #define NV30_VP_INST_SRC2H_SHIFT        0    /*NV20*/
 112 #define NV30_VP_INST_SRC2H_MASK          (0x7FF << 0)  /* NV30_VP_SRC2_HIGH_MASK >> 4*/
 113 #define NV30_VP_INST_IADDR_SHIFT        2
 114 #define NV30_VP_INST_IADDR_MASK          (0xF <<  28)   /* NV30_VP_SRC2_LOW_MASK << 28 */
 115
 116 /* DWORD 3 */
 117 #define NV30_VP_INST_SRC2L_SHIFT        28    /*NV20*/
 118 #define NV30_VP_INST_SRC2L_MASK          (0x0F  <<28)  /*NV20*/
 119 #define NV30_VP_INST_STEMP_WRITEMASK_SHIFT      24
 120 #define NV30_VP_INST_STEMP_WRITEMASK_MASK      (0x0F << 24)
 121 #define NV30_VP_INST_VTEMP_WRITEMASK_SHIFT      20
 122 #define NV30_VP_INST_VTEMP_WRITEMASK_MASK      (0x0F << 20)
 123 #define NV30_VP_INST_SDEST_WRITEMASK_SHIFT      16
 124 #define NV30_VP_INST_SDEST_WRITEMASK_MASK      (0x0F << 16)
 125 #define NV30_VP_INST_VDEST_WRITEMASK_SHIFT      12    /*NV20*/
 126 #define NV30_VP_INST_VDEST_WRITEMASK_MASK      (0x0F << 12)  /*NV20*/
 127 #define NV30_VP_INST_DEST_SHIFT        2
 128 #define NV30_VP_INST_DEST_MASK        (0x0F <<  2)
 129 #  define NV30_VP_INST_DEST_POS  0
 130 #  define NV30_VP_INST_DEST_BFC0  1
 131 #  define NV30_VP_INST_DEST_BFC1  2
 132 #  define NV30_VP_INST_DEST_COL0  3
 133 #  define NV30_VP_INST_DEST_COL1  4
 134 #  define NV30_VP_INST_DEST_FOGC  5
 135 #  define NV30_VP_INST_DEST_PSZ   6
 136 #  define NV30_VP_INST_DEST_TC(n)  (8+n)
 137
 138 /* Useful to split the source selection regs into their pieces */
 139 #define NV30_VP_SRC0_HIGH_SHIFT                                                6
 140 #define NV30_VP_SRC0_HIGH_MASK                                        0x00007FC0
 141 #define NV30_VP_SRC0_LOW_MASK                                         0x0000003F
 142 #define NV30_VP_SRC2_HIGH_SHIFT                                                4
 143 #define NV30_VP_SRC2_HIGH_MASK                                        0x00007FF0
 144 #define NV30_VP_SRC2_LOW_MASK                                         0x0000000F
 145
 146
 147 /* Source-register definition - matches NV20 exactly */
 148 #define NV30_VP_SRC_NEGATE          (1<<14)
 149 #define NV30_VP_SRC_SWZ_X_SHIFT        12
 150 #define NV30_VP_SRC_REG_SWZ_X_MASK        (0x03  <<12)
 151 #define NV30_VP_SRC_SWZ_Y_SHIFT        10
 152 #define NV30_VP_SRC_REG_SWZ_Y_MASK        (0x03  <<10)
 153 #define NV30_VP_SRC_SWZ_Z_SHIFT        8
 154 #define NV30_VP_SRC_REG_SWZ_Z_MASK        (0x03  << 8)
 155 #define NV30_VP_SRC_SWZ_W_SHIFT        6
 156 #define NV30_VP_SRC_REG_SWZ_W_MASK        (0x03  << 6)
 157 #define NV30_VP_SRC_REG_SWZ_ALL_SHIFT        6
 158 #define NV30_VP_SRC_REG_SWZ_ALL_MASK        (0xFF  << 6)
 159 #define NV30_VP_SRC_TEMP_SRC_SHIFT        2
 160 #define NV30_VP_SRC_REG_TEMP_ID_MASK        (0x0F  << 0)
 161 #define NV30_VP_SRC_REG_TYPE_SHIFT        0
 162 #define NV30_VP_SRC_REG_TYPE_MASK        (0x03  << 0)
 163 #define NV30_VP_SRC_REG_TYPE_TEMP  1
 164 #define NV30_VP_SRC_REG_TYPE_INPUT  2
 165 #define NV30_VP_SRC_REG_TYPE_CONST  3 /* guess */
 166
 167 #include "nvfx_shader.h"
 168
 169 #endif