src/gallium/drivers/i915/i915_fpc.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #ifndef I915_FPC_H
  30 #define I915_FPC_H
  31
  32
  33 #include "i915_context.h"
  34 #include "i915_reg.h"
  35
  36 #include "pipe/p_shader_tokens.h"
  37
  38 #include "tgsi/tgsi_parse.h"
  39
  40 #define I915_PROGRAM_SIZE 192
  41
  42 /* Use those indices for pos/face routing, must be >= num of inputs */
  43 #define I915_SEMANTIC_POS  100
  44 #define I915_SEMANTIC_FACE 101
  45
  46
  47 /**
  48  * Program translation state
  49  */
  50 struct i915_fp_compile {
  51    struct i915_fragment_shader *shader;  /* the shader we're compiling */
  52
  53    boolean used_constants[I915_MAX_CONSTANT];
  54
  55    /** maps TGSI immediate index to constant slot */
  56    uint num_immediates;
  57    uint immediates_map[I915_MAX_CONSTANT];
  58    float immediates[I915_MAX_CONSTANT][4];
  59
  60    boolean first_instruction;
  61
  62    uint declarations[I915_PROGRAM_SIZE];
  63    uint program[I915_PROGRAM_SIZE];
  64
  65    uint *csr;            /**< Cursor, points into program. */
  66
  67    uint *decl;           /**< Cursor, points into declarations. */
  68
  69    uint decl_s;          /**< flags for which s regs need to be decl'd */
  70    uint decl_t;          /**< flags for which t regs need to be decl'd */
  71
  72    uint temp_flag;       /**< Tracks temporary regs which are in use */
  73    uint utemp_flag;      /**< Tracks TYPE_U temporary regs which are in use */
  74
  75    uint register_phases[I915_MAX_TEMPORARY];
  76    uint nr_tex_indirect;
  77    uint nr_tex_insn;
  78    uint nr_alu_insn;
  79    uint nr_decl_insn;
  80
  81    boolean error;      /**< Set if i915_program_error() is called */
  82    uint NumNativeInstructions;
  83    uint NumNativeAluInstructions;
  84    uint NumNativeTexInstructions;
  85    uint NumNativeTexIndirections;
  86 };
  87
  88
  89 /* Having zero and one in here makes the definition of swizzle a lot
  90  * easier.
  91  */
  92 #define UREG_TYPE_SHIFT               29
  93 #define UREG_NR_SHIFT                 24
  94 #define UREG_CHANNEL_X_NEGATE_SHIFT   23
  95 #define UREG_CHANNEL_X_SHIFT          20
  96 #define UREG_CHANNEL_Y_NEGATE_SHIFT   19
  97 #define UREG_CHANNEL_Y_SHIFT          16
  98 #define UREG_CHANNEL_Z_NEGATE_SHIFT   15
  99 #define UREG_CHANNEL_Z_SHIFT          12
 100 #define UREG_CHANNEL_W_NEGATE_SHIFT   11
 101 #define UREG_CHANNEL_W_SHIFT          8
 102 #define UREG_CHANNEL_ZERO_NEGATE_MBZ  5
 103 #define UREG_CHANNEL_ZERO_SHIFT       4
 104 #define UREG_CHANNEL_ONE_NEGATE_MBZ   1
 105 #define UREG_CHANNEL_ONE_SHIFT        0
 106
 107 #define UREG_BAD          0xffffffff    /* not a valid ureg */
 108
 109 #define X    SRC_X
 110 #define Y    SRC_Y
 111 #define Z    SRC_Z
 112 #define W    SRC_W
 113 #define ZERO SRC_ZERO
 114 #define ONE  SRC_ONE
 115
 116 /* Construct a ureg:
 117  */
 118 #define UREG( type, nr ) (((type)<< UREG_TYPE_SHIFT) |          \
 119                           ((nr)  << UREG_NR_SHIFT) |            \
 120                           (X     << UREG_CHANNEL_X_SHIFT) |     \
 121                           (Y     << UREG_CHANNEL_Y_SHIFT) |     \
 122                           (Z     << UREG_CHANNEL_Z_SHIFT) |     \
 123                           (W     << UREG_CHANNEL_W_SHIFT) |     \
 124                           (ZERO  << UREG_CHANNEL_ZERO_SHIFT) |  \
 125                           (ONE   << UREG_CHANNEL_ONE_SHIFT))
 126
 127 #define GET_CHANNEL_SRC( reg, channel ) ((reg<<(channel*4)) & (0xf<<20))
 128 #define CHANNEL_SRC( src, channel ) (src>>(channel*4))
 129
 130 #define GET_UREG_TYPE(reg) (((reg)>>UREG_TYPE_SHIFT)&REG_TYPE_MASK)
 131 #define GET_UREG_NR(reg)   (((reg)>>UREG_NR_SHIFT)&REG_NR_MASK)
 132
 133
 134
 135 #define UREG_XYZW_CHANNEL_MASK 0x00ffff00
 136
 137 /* One neat thing about the UREG representation:
 138  */
 139 static inline int
 140 swizzle(int reg, uint x, uint y, uint z, uint w)
 141 {
 142    assert(x <= SRC_ONE);
 143    assert(y <= SRC_ONE);
 144    assert(z <= SRC_ONE);
 145    assert(w <= SRC_ONE);
 146    return ((reg & ~UREG_XYZW_CHANNEL_MASK) |
 147            CHANNEL_SRC(GET_CHANNEL_SRC(reg, x), 0) |
 148            CHANNEL_SRC(GET_CHANNEL_SRC(reg, y), 1) |
 149            CHANNEL_SRC(GET_CHANNEL_SRC(reg, z), 2) |
 150            CHANNEL_SRC(GET_CHANNEL_SRC(reg, w), 3));
 151 }
 152
 153
 154 #define A0_DEST( reg ) (((reg)&UREG_TYPE_NR_MASK)>>UREG_A0_DEST_SHIFT_LEFT)
 155 #define D0_DEST( reg ) (((reg)&UREG_TYPE_NR_MASK)>>UREG_A0_DEST_SHIFT_LEFT)
 156 #define T0_DEST( reg ) (((reg)&UREG_TYPE_NR_MASK)>>UREG_A0_DEST_SHIFT_LEFT)
 157 #define A0_SRC0( reg ) (((reg)&UREG_MASK)>>UREG_A0_SRC0_SHIFT_LEFT)
 158 #define A1_SRC0( reg ) (((reg)&UREG_MASK)<<UREG_A1_SRC0_SHIFT_RIGHT)
 159 #define A1_SRC1( reg ) (((reg)&UREG_MASK)>>UREG_A1_SRC1_SHIFT_LEFT)
 160 #define A2_SRC1( reg ) (((reg)&UREG_MASK)<<UREG_A2_SRC1_SHIFT_RIGHT)
 161 #define A2_SRC2( reg ) (((reg)&UREG_MASK)>>UREG_A2_SRC2_SHIFT_LEFT)
 162
 163 /* These are special, and don't have swizzle/negate bits.
 164  */
 165 #define T0_SAMPLER( reg )     (GET_UREG_NR(reg)<<T0_SAMPLER_NR_SHIFT)
 166 #define T1_ADDRESS_REG( reg ) ((GET_UREG_NR(reg)<<T1_ADDRESS_REG_NR_SHIFT) | \
 167                                (GET_UREG_TYPE(reg)<<T1_ADDRESS_REG_TYPE_SHIFT))
 168
 169
 170 /* Macros for translating UREG's into the various register fields used
 171  * by the I915 programmable unit.
 172  */
 173 #define UREG_A0_DEST_SHIFT_LEFT  (UREG_TYPE_SHIFT - A0_DEST_TYPE_SHIFT)
 174 #define UREG_A0_SRC0_SHIFT_LEFT  (UREG_TYPE_SHIFT - A0_SRC0_TYPE_SHIFT)
 175 #define UREG_A1_SRC0_SHIFT_RIGHT (A1_SRC0_CHANNEL_W_SHIFT - UREG_CHANNEL_W_SHIFT)
 176 #define UREG_A1_SRC1_SHIFT_LEFT  (UREG_TYPE_SHIFT - A1_SRC1_TYPE_SHIFT)
 177 #define UREG_A2_SRC1_SHIFT_RIGHT (A2_SRC1_CHANNEL_W_SHIFT - UREG_CHANNEL_W_SHIFT)
 178 #define UREG_A2_SRC2_SHIFT_LEFT  (UREG_TYPE_SHIFT - A2_SRC2_TYPE_SHIFT)
 179
 180 #define UREG_MASK         0xffffff00
 181 #define UREG_TYPE_NR_MASK ((REG_TYPE_MASK << UREG_TYPE_SHIFT) | \
 182                            (REG_NR_MASK << UREG_NR_SHIFT))
 183
 184
 185
 186
 187 /***********************************************************************
 188  * Public interface for the compiler
 189  */
 190 extern void
 191 i915_translate_fragment_program( struct i915_context *i915,
 192                                  struct i915_fragment_shader *fs);
 193
 194
 195
 196 extern uint i915_get_temp(struct i915_fp_compile *p);
 197 extern uint i915_get_utemp(struct i915_fp_compile *p);
 198 extern void i915_release_utemps(struct i915_fp_compile *p);
 199
 200
 201 extern uint i915_emit_texld(struct i915_fp_compile *p,
 202                               uint dest,
 203                               uint destmask,
 204                               uint sampler,
 205                               uint coord,
 206                               uint op,
 207                               uint num_coord);
 208
 209 extern uint i915_emit_arith(struct i915_fp_compile *p,
 210                               uint op,
 211                               uint dest,
 212                               uint mask,
 213                               uint saturate,
 214                               uint src0, uint src1, uint src2);
 215
 216 extern uint i915_emit_decl(struct i915_fp_compile *p,
 217                              uint type, uint nr, uint d0_flags);
 218
 219
 220 extern uint i915_emit_const1f(struct i915_fp_compile *p, float c0);
 221
 222 extern uint i915_emit_const2f(struct i915_fp_compile *p,
 223                                 float c0, float c1);
 224
 225 extern uint i915_emit_const4fv(struct i915_fp_compile *p,
 226                                  const float * c);
 227
 228 extern uint i915_emit_const4f(struct i915_fp_compile *p,
 229                                 float c0, float c1,
 230                                 float c2, float c3);
 231
 232
 233 /*======================================================================
 234  * i915_fpc_translate.c
 235  */
 236
 237 extern void
 238 i915_program_error(struct i915_fp_compile *p, const char *msg, ...);
 239
 240
 241 /*======================================================================
 242  * i915_fpc_optimize.c
 243  */
 244
 245
 246 struct i915_src_register
 247 {
 248    unsigned File        : 4;  /* TGSI_FILE_ */
 249    unsigned Indirect    : 1;  /* BOOL */
 250    unsigned Dimension   : 1;  /* BOOL */
 251    int      Index       : 16; /* SINT */
 252    unsigned SwizzleX    : 3;  /* TGSI_SWIZZLE_ */
 253    unsigned SwizzleY    : 3;  /* TGSI_SWIZZLE_ */
 254    unsigned SwizzleZ    : 3;  /* TGSI_SWIZZLE_ */
 255    unsigned SwizzleW    : 3;  /* TGSI_SWIZZLE_ */
 256    unsigned Absolute    : 1;    /* BOOL */
 257    unsigned Negate      : 1;    /* BOOL */
 258 };
 259
 260 /* Additional swizzle supported in i915 */
 261 #define TGSI_SWIZZLE_ZERO 4
 262 #define TGSI_SWIZZLE_ONE 5
 263
 264 struct i915_dst_register
 265 {
 266    unsigned File        : 4;  /* TGSI_FILE_ */
 267    unsigned WriteMask   : 4;  /* TGSI_WRITEMASK_ */
 268    unsigned Indirect    : 1;  /* BOOL */
 269    unsigned Dimension   : 1;  /* BOOL */
 270    int      Index       : 16; /* SINT */
 271    unsigned Padding     : 6;
 272 };
 273
 274
 275 struct i915_full_dst_register
 276 {
 277    struct i915_dst_register               Register;
 278 /*
 279    struct tgsi_ind_register               Indirect;
 280    struct tgsi_dimension                  Dimension;
 281    struct tgsi_ind_register               DimIndirect;
 282 */
 283 };
 284
 285 struct i915_full_src_register
 286 {
 287    struct i915_src_register         Register;
 288 /*
 289    struct tgsi_ind_register         Indirect;
 290    struct tgsi_dimension            Dimension;
 291    struct tgsi_ind_register         DimIndirect;
 292 */
 293 };
 294
 295 struct i915_full_instruction
 296 {
 297    struct tgsi_instruction             Instruction;
 298 /*
 299    struct tgsi_instruction_label       Label;
 300 */
 301    struct tgsi_instruction_texture     Texture;
 302    struct i915_full_dst_register       Dst[1];
 303    struct i915_full_src_register       Src[3];
 304 };
 305
 306
 307 union i915_full_token
 308 {
 309    struct tgsi_token             Token;
 310    struct tgsi_full_declaration  FullDeclaration;
 311    struct tgsi_full_immediate    FullImmediate;
 312    struct i915_full_instruction  FullInstruction;
 313    struct tgsi_full_property     FullProperty;
 314 };
 315
 316 struct i915_token_list
 317 {
 318    union i915_full_token*     Tokens;
 319    unsigned                   NumTokens;
 320 };
 321
 322 extern struct i915_token_list* i915_optimize(const struct tgsi_token *tokens);
 323
 324 extern void i915_optimize_free(struct i915_token_list *tokens);
 325
 326 extern uint i915_num_coords(uint tex);
 327
 328 #endif