1 /**************************************************************************
3 * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
5 * Copyright 2009-2010 VMware, Inc. All rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
32 #include "pipe/p_compiler.h"
33 #include "pipe/p_state.h"
35 #if defined __cplusplus
40 #define NUM_CHANNELS 4 /* R,G,B,A */
41 #define QUAD_SIZE 4 /* 4 pixel/quad */
45 * Registers may be treated as float, signed int or unsigned int.
47 union tgsi_exec_channel
51 unsigned u
[QUAD_SIZE
];
55 * A vector[RGBA] of channels[4 pixels]
57 struct tgsi_exec_vector
59 union tgsi_exec_channel xyzw
[NUM_CHANNELS
];
63 * For fragment programs, information for computing fragment input
64 * values from plane equation of the triangle/line.
66 struct tgsi_interp_coef
68 float a0
[NUM_CHANNELS
]; /* in an xyzw layout */
69 float dadx
[NUM_CHANNELS
];
70 float dady
[NUM_CHANNELS
];
73 enum tgsi_sampler_control
{
74 tgsi_sampler_lod_bias
,
75 tgsi_sampler_lod_explicit
79 * Information for sampling textures, which must be implemented
80 * by code outside the TGSI executor.
84 /** Get samples for four fragments in a quad */
85 void (*get_samples
)(struct tgsi_sampler
*sampler
,
86 const float s
[QUAD_SIZE
],
87 const float t
[QUAD_SIZE
],
88 const float p
[QUAD_SIZE
],
89 const float c0
[QUAD_SIZE
],
90 enum tgsi_sampler_control control
,
91 float rgba
[NUM_CHANNELS
][QUAD_SIZE
]);
94 #define TGSI_EXEC_NUM_TEMPS 128
95 #define TGSI_EXEC_NUM_IMMEDIATES 256
96 #define TGSI_EXEC_NUM_TEMP_ARRAYS 8
99 * Locations of various utility registers (_I = Index, _C = Channel)
101 #define TGSI_EXEC_TEMP_00000000_I (TGSI_EXEC_NUM_TEMPS + 0)
102 #define TGSI_EXEC_TEMP_00000000_C 0
104 #define TGSI_EXEC_TEMP_7FFFFFFF_I (TGSI_EXEC_NUM_TEMPS + 0)
105 #define TGSI_EXEC_TEMP_7FFFFFFF_C 1
107 #define TGSI_EXEC_TEMP_80000000_I (TGSI_EXEC_NUM_TEMPS + 0)
108 #define TGSI_EXEC_TEMP_80000000_C 2
110 #define TGSI_EXEC_TEMP_FFFFFFFF_I (TGSI_EXEC_NUM_TEMPS + 0)
111 #define TGSI_EXEC_TEMP_FFFFFFFF_C 3
113 #define TGSI_EXEC_TEMP_ONE_I (TGSI_EXEC_NUM_TEMPS + 1)
114 #define TGSI_EXEC_TEMP_ONE_C 0
116 #define TGSI_EXEC_TEMP_TWO_I (TGSI_EXEC_NUM_TEMPS + 1)
117 #define TGSI_EXEC_TEMP_TWO_C 1
119 #define TGSI_EXEC_TEMP_128_I (TGSI_EXEC_NUM_TEMPS + 1)
120 #define TGSI_EXEC_TEMP_128_C 2
122 #define TGSI_EXEC_TEMP_MINUS_128_I (TGSI_EXEC_NUM_TEMPS + 1)
123 #define TGSI_EXEC_TEMP_MINUS_128_C 3
125 #define TGSI_EXEC_TEMP_KILMASK_I (TGSI_EXEC_NUM_TEMPS + 2)
126 #define TGSI_EXEC_TEMP_KILMASK_C 0
128 #define TGSI_EXEC_TEMP_OUTPUT_I (TGSI_EXEC_NUM_TEMPS + 2)
129 #define TGSI_EXEC_TEMP_OUTPUT_C 1
131 #define TGSI_EXEC_TEMP_PRIMITIVE_I (TGSI_EXEC_NUM_TEMPS + 2)
132 #define TGSI_EXEC_TEMP_PRIMITIVE_C 2
134 #define TGSI_EXEC_TEMP_THREE_I (TGSI_EXEC_NUM_TEMPS + 2)
135 #define TGSI_EXEC_TEMP_THREE_C 3
137 #define TGSI_EXEC_TEMP_HALF_I (TGSI_EXEC_NUM_TEMPS + 3)
138 #define TGSI_EXEC_TEMP_HALF_C 0
140 /* execution mask, each value is either 0 or ~0 */
141 #define TGSI_EXEC_MASK_I (TGSI_EXEC_NUM_TEMPS + 3)
142 #define TGSI_EXEC_MASK_C 1
144 /* 4 register buffer for various purposes */
145 #define TGSI_EXEC_TEMP_R0 (TGSI_EXEC_NUM_TEMPS + 4)
146 #define TGSI_EXEC_NUM_TEMP_R 4
148 #define TGSI_EXEC_TEMP_ADDR (TGSI_EXEC_NUM_TEMPS + 8)
149 #define TGSI_EXEC_NUM_ADDRS 1
151 /* predicate register */
152 #define TGSI_EXEC_TEMP_P0 (TGSI_EXEC_NUM_TEMPS + 9)
153 #define TGSI_EXEC_NUM_PREDS 1
155 #define TGSI_EXEC_NUM_TEMP_EXTRAS 10
159 #define TGSI_EXEC_MAX_NESTING 32
160 #define TGSI_EXEC_MAX_COND_NESTING TGSI_EXEC_MAX_NESTING
161 #define TGSI_EXEC_MAX_LOOP_NESTING TGSI_EXEC_MAX_NESTING
162 #define TGSI_EXEC_MAX_SWITCH_NESTING TGSI_EXEC_MAX_NESTING
163 #define TGSI_EXEC_MAX_CALL_NESTING TGSI_EXEC_MAX_NESTING
165 /* The maximum number of input attributes per vertex. For 2D
166 * input register files, this is the stride between two 1D
169 #define TGSI_EXEC_MAX_INPUT_ATTRIBS 17
171 /* The maximum number of constant vectors per constant buffer.
173 #define TGSI_EXEC_MAX_CONST_BUFFER 4096
175 /* The maximum number of vertices per primitive */
176 #define TGSI_MAX_PRIM_VERTICES 6
178 /* The maximum number of primitives to be generated */
179 #define TGSI_MAX_PRIMITIVES 64
181 /* The maximum total number of vertices */
182 #define TGSI_MAX_TOTAL_VERTICES (TGSI_MAX_PRIM_VERTICES * TGSI_MAX_PRIMITIVES * PIPE_MAX_ATTRIBS)
184 /** function call/activation record */
185 struct tgsi_call_record
196 /* Switch-case block state. */
197 struct tgsi_switch_record
{
198 uint mask
; /**< execution mask */
199 union tgsi_exec_channel selector
; /**< a value case statements are compared to */
200 uint defaultMask
; /**< non-execute mask for default case */
204 enum tgsi_break_type
{
205 TGSI_EXEC_BREAK_INSIDE_LOOP
,
206 TGSI_EXEC_BREAK_INSIDE_SWITCH
210 #define TGSI_EXEC_MAX_BREAK_STACK (TGSI_EXEC_MAX_LOOP_NESTING + TGSI_EXEC_MAX_SWITCH_NESTING)
214 * Run-time virtual machine state for executing TGSI shader.
216 struct tgsi_exec_machine
218 /* Total = program temporaries + internal temporaries
220 struct tgsi_exec_vector Temps
[TGSI_EXEC_NUM_TEMPS
+
221 TGSI_EXEC_NUM_TEMP_EXTRAS
];
222 struct tgsi_exec_vector TempArray
[TGSI_EXEC_NUM_TEMP_ARRAYS
][TGSI_EXEC_NUM_TEMPS
];
224 float Imms
[TGSI_EXEC_NUM_IMMEDIATES
][4];
226 float ImmArray
[TGSI_EXEC_NUM_IMMEDIATES
][4];
228 struct tgsi_exec_vector Inputs
[TGSI_MAX_PRIM_VERTICES
* PIPE_MAX_ATTRIBS
];
229 struct tgsi_exec_vector Outputs
[TGSI_MAX_TOTAL_VERTICES
];
231 struct tgsi_exec_vector
*Addrs
;
232 struct tgsi_exec_vector
*Predicates
;
234 struct tgsi_sampler
**Samplers
;
238 const void *Consts
[PIPE_MAX_CONSTANT_BUFFERS
];
239 unsigned ConstsSize
[PIPE_MAX_CONSTANT_BUFFERS
];
241 const struct tgsi_token
*Tokens
; /**< Declarations, instructions */
242 unsigned Processor
; /**< TGSI_PROCESSOR_x */
244 /* GEOMETRY processor only. */
245 unsigned *Primitives
;
247 unsigned MaxGeometryShaderOutputs
;
249 /* FRAGMENT processor only. */
250 const struct tgsi_interp_coef
*InterpCoefs
;
251 struct tgsi_exec_vector QuadPos
;
252 float Face
; /**< +1 if front facing, -1 if back facing */
254 /* Conditional execution masks */
255 uint CondMask
; /**< For IF/ELSE/ENDIF */
256 uint LoopMask
; /**< For BGNLOOP/ENDLOOP */
257 uint ContMask
; /**< For loop CONT statements */
258 uint FuncMask
; /**< For function calls */
259 uint ExecMask
; /**< = CondMask & LoopMask */
261 /* Current switch-case state. */
262 struct tgsi_switch_record Switch
;
264 /* Current break type. */
265 enum tgsi_break_type BreakType
;
267 /** Condition mask stack (for nested conditionals) */
268 uint CondStack
[TGSI_EXEC_MAX_COND_NESTING
];
271 /** Loop mask stack (for nested loops) */
272 uint LoopStack
[TGSI_EXEC_MAX_LOOP_NESTING
];
275 /** Loop label stack */
276 uint LoopLabelStack
[TGSI_EXEC_MAX_LOOP_NESTING
];
277 int LoopLabelStackTop
;
279 /** Loop continue mask stack (see comments in tgsi_exec.c) */
280 uint ContStack
[TGSI_EXEC_MAX_LOOP_NESTING
];
283 /** Switch case stack */
284 struct tgsi_switch_record SwitchStack
[TGSI_EXEC_MAX_SWITCH_NESTING
];
287 enum tgsi_break_type BreakStack
[TGSI_EXEC_MAX_BREAK_STACK
];
290 /** Function execution mask stack (for executing subroutine code) */
291 uint FuncStack
[TGSI_EXEC_MAX_CALL_NESTING
];
294 /** Function call stack for saving/restoring the program counter */
295 struct tgsi_call_record CallStack
[TGSI_EXEC_MAX_CALL_NESTING
];
298 struct tgsi_full_instruction
*Instructions
;
299 uint NumInstructions
;
301 struct tgsi_full_declaration
*Declarations
;
302 uint NumDeclarations
;
306 struct tgsi_exec_machine
*
307 tgsi_exec_machine_create( void );
310 tgsi_exec_machine_destroy(struct tgsi_exec_machine
*mach
);
314 tgsi_exec_machine_bind_shader(
315 struct tgsi_exec_machine
*mach
,
316 const struct tgsi_token
*tokens
,
318 struct tgsi_sampler
**samplers
);
321 tgsi_exec_machine_run(
322 struct tgsi_exec_machine
*mach
);
326 tgsi_exec_machine_free_data(struct tgsi_exec_machine
*mach
);
330 tgsi_check_soa_dependencies(const struct tgsi_full_instruction
*inst
);
334 tgsi_set_kill_mask(struct tgsi_exec_machine
*mach
, unsigned mask
)
336 mach
->Temps
[TGSI_EXEC_TEMP_KILMASK_I
].xyzw
[TGSI_EXEC_TEMP_KILMASK_C
].u
[0] =
341 /** Set execution mask values prior to executing the shader */
343 tgsi_set_exec_mask(struct tgsi_exec_machine
*mach
,
344 boolean ch0
, boolean ch1
, boolean ch2
, boolean ch3
)
346 int *mask
= mach
->Temps
[TGSI_EXEC_MASK_I
].xyzw
[TGSI_EXEC_MASK_C
].i
;
347 mask
[0] = ch0
? ~0 : 0;
348 mask
[1] = ch1
? ~0 : 0;
349 mask
[2] = ch2
? ~0 : 0;
350 mask
[3] = ch3
? ~0 : 0;
355 tgsi_exec_set_constant_buffers(struct tgsi_exec_machine
*mach
,
358 const unsigned *buf_sizes
);
362 tgsi_exec_get_shader_param(enum pipe_shader_cap param
)
365 case PIPE_SHADER_CAP_MAX_INSTRUCTIONS
:
366 case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS
:
367 case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS
:
368 case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS
:
370 case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH
:
371 return TGSI_EXEC_MAX_NESTING
;
372 case PIPE_SHADER_CAP_MAX_INPUTS
:
373 return TGSI_EXEC_MAX_INPUT_ATTRIBS
;
374 case PIPE_SHADER_CAP_MAX_CONSTS
:
375 return TGSI_EXEC_MAX_CONST_BUFFER
;
376 case PIPE_SHADER_CAP_MAX_CONST_BUFFERS
:
377 return PIPE_MAX_CONSTANT_BUFFERS
;
378 case PIPE_SHADER_CAP_MAX_TEMPS
:
379 return TGSI_EXEC_NUM_TEMPS
;
380 case PIPE_SHADER_CAP_MAX_ADDRS
:
381 return TGSI_EXEC_NUM_ADDRS
;
382 case PIPE_SHADER_CAP_MAX_PREDS
:
383 return TGSI_EXEC_NUM_PREDS
;
384 case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED
:
391 #if defined __cplusplus
395 #endif /* TGSI_EXEC_H */