1 /**************************************************************************
3 * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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 TUNGSTEN GRAPHICS 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.
26 **************************************************************************/
31 #include "pipe/p_compiler.h"
33 #if defined __cplusplus
37 #define MAX_LABELS 1024
39 #define NUM_CHANNELS 4 /* R,G,B,A */
40 #define QUAD_SIZE 4 /* 4 pixel/quad */
43 * Registers may be treated as float, signed int or unsigned int.
45 union tgsi_exec_channel
49 unsigned u
[QUAD_SIZE
];
53 * A vector[RGBA] of channels[4 pixels]
55 struct tgsi_exec_vector
57 union tgsi_exec_channel xyzw
[NUM_CHANNELS
];
61 * For fragment programs, information for computing fragment input
62 * values from plane equation of the triangle/line.
64 struct tgsi_interp_coef
66 float a0
[NUM_CHANNELS
]; /* in an xyzw layout */
67 float dadx
[NUM_CHANNELS
];
68 float dady
[NUM_CHANNELS
];
72 struct softpipe_tile_cache
; /**< Opaque to TGSI */
75 * Information for sampling textures, which must be implemented
76 * by code outside the TGSI executor.
80 const struct pipe_sampler_state
*state
;
81 struct pipe_texture
*texture
;
82 /** Get samples for four fragments in a quad */
83 void (*get_samples
)(struct tgsi_sampler
*sampler
,
84 const float s
[QUAD_SIZE
],
85 const float t
[QUAD_SIZE
],
86 const float p
[QUAD_SIZE
],
88 float rgba
[NUM_CHANNELS
][QUAD_SIZE
]);
89 void *pipe
; /*XXX temporary*/
90 struct softpipe_tile_cache
*cache
;
94 * For branching/calling subroutines.
96 struct tgsi_exec_labels
98 unsigned labels
[MAX_LABELS
][2];
103 #define TGSI_EXEC_NUM_TEMPS 128
104 #define TGSI_EXEC_NUM_TEMP_EXTRAS 6
105 #define TGSI_EXEC_NUM_IMMEDIATES 256
108 * Locations of various utility registers (_I = Index, _C = Channel)
110 #define TGSI_EXEC_TEMP_00000000_I (TGSI_EXEC_NUM_TEMPS + 0)
111 #define TGSI_EXEC_TEMP_00000000_C 0
113 #define TGSI_EXEC_TEMP_7FFFFFFF_I (TGSI_EXEC_NUM_TEMPS + 0)
114 #define TGSI_EXEC_TEMP_7FFFFFFF_C 1
116 #define TGSI_EXEC_TEMP_80000000_I (TGSI_EXEC_NUM_TEMPS + 0)
117 #define TGSI_EXEC_TEMP_80000000_C 2
119 #define TGSI_EXEC_TEMP_FFFFFFFF_I (TGSI_EXEC_NUM_TEMPS + 0)
120 #define TGSI_EXEC_TEMP_FFFFFFFF_C 3
122 #define TGSI_EXEC_TEMP_ONE_I (TGSI_EXEC_NUM_TEMPS + 1)
123 #define TGSI_EXEC_TEMP_ONE_C 0
125 #define TGSI_EXEC_TEMP_TWO_I (TGSI_EXEC_NUM_TEMPS + 1)
126 #define TGSI_EXEC_TEMP_TWO_C 1
128 #define TGSI_EXEC_TEMP_128_I (TGSI_EXEC_NUM_TEMPS + 1)
129 #define TGSI_EXEC_TEMP_128_C 2
131 #define TGSI_EXEC_TEMP_MINUS_128_I (TGSI_EXEC_NUM_TEMPS + 1)
132 #define TGSI_EXEC_TEMP_MINUS_128_C 3
134 #define TGSI_EXEC_TEMP_KILMASK_I (TGSI_EXEC_NUM_TEMPS + 2)
135 #define TGSI_EXEC_TEMP_KILMASK_C 0
137 #define TGSI_EXEC_TEMP_OUTPUT_I (TGSI_EXEC_NUM_TEMPS + 2)
138 #define TGSI_EXEC_TEMP_OUTPUT_C 1
140 #define TGSI_EXEC_TEMP_PRIMITIVE_I (TGSI_EXEC_NUM_TEMPS + 2)
141 #define TGSI_EXEC_TEMP_PRIMITIVE_C 2
143 /* NVIDIA condition code (CC) vector
145 #define TGSI_EXEC_CC_GT 0x01
146 #define TGSI_EXEC_CC_EQ 0x02
147 #define TGSI_EXEC_CC_LT 0x04
148 #define TGSI_EXEC_CC_UN 0x08
150 #define TGSI_EXEC_CC_X_MASK 0x000000ff
151 #define TGSI_EXEC_CC_X_SHIFT 0
152 #define TGSI_EXEC_CC_Y_MASK 0x0000ff00
153 #define TGSI_EXEC_CC_Y_SHIFT 8
154 #define TGSI_EXEC_CC_Z_MASK 0x00ff0000
155 #define TGSI_EXEC_CC_Z_SHIFT 16
156 #define TGSI_EXEC_CC_W_MASK 0xff000000
157 #define TGSI_EXEC_CC_W_SHIFT 24
159 #define TGSI_EXEC_TEMP_CC_I (TGSI_EXEC_NUM_TEMPS + 2)
160 #define TGSI_EXEC_TEMP_CC_C 3
162 #define TGSI_EXEC_TEMP_THREE_I (TGSI_EXEC_NUM_TEMPS + 3)
163 #define TGSI_EXEC_TEMP_THREE_C 0
165 #define TGSI_EXEC_TEMP_HALF_I (TGSI_EXEC_NUM_TEMPS + 3)
166 #define TGSI_EXEC_TEMP_HALF_C 1
168 #define TGSI_EXEC_TEMP_R0 (TGSI_EXEC_NUM_TEMPS + 4)
170 #define TGSI_EXEC_TEMP_ADDR (TGSI_EXEC_NUM_TEMPS + 5)
173 #define TGSI_EXEC_MAX_COND_NESTING 20
174 #define TGSI_EXEC_MAX_LOOP_NESTING 20
175 #define TGSI_EXEC_MAX_CALL_NESTING 20
178 * Run-time virtual machine state for executing TGSI shader.
180 struct tgsi_exec_machine
182 /* Total = program temporaries + internal temporaries
183 * + 1 padding to align to 16 bytes
185 struct tgsi_exec_vector _Temps
[TGSI_EXEC_NUM_TEMPS
+
186 TGSI_EXEC_NUM_TEMP_EXTRAS
+ 1];
189 * This will point to _Temps after aligning to 16B boundary.
191 struct tgsi_exec_vector
*Temps
;
192 struct tgsi_exec_vector
*Addrs
;
194 struct tgsi_sampler
*Samplers
;
196 float Imms
[TGSI_EXEC_NUM_IMMEDIATES
][4];
198 const float (*Consts
)[4];
199 struct tgsi_exec_vector
*Inputs
;
200 struct tgsi_exec_vector
*Outputs
;
201 const struct tgsi_token
*Tokens
;
204 /* GEOMETRY processor only. */
205 unsigned *Primitives
;
207 /* FRAGMENT processor only. */
208 const struct tgsi_interp_coef
*InterpCoefs
;
209 struct tgsi_exec_vector QuadPos
;
211 /* Conditional execution masks */
212 uint CondMask
; /**< For IF/ELSE/ENDIF */
213 uint LoopMask
; /**< For BGNLOOP/ENDLOOP */
214 uint ContMask
; /**< For loop CONT statements */
215 uint FuncMask
; /**< For function calls */
216 uint ExecMask
; /**< = CondMask & LoopMask */
218 /** Condition mask stack (for nested conditionals) */
219 uint CondStack
[TGSI_EXEC_MAX_COND_NESTING
];
222 /** Loop mask stack (for nested loops) */
223 uint LoopStack
[TGSI_EXEC_MAX_LOOP_NESTING
];
226 /** Loop continue mask stack (see comments in tgsi_exec.c) */
227 uint ContStack
[TGSI_EXEC_MAX_LOOP_NESTING
];
230 /** Function execution mask stack (for executing subroutine code) */
231 uint FuncStack
[TGSI_EXEC_MAX_CALL_NESTING
];
234 /** Function call stack for saving/restoring the program counter */
235 uint CallStack
[TGSI_EXEC_MAX_CALL_NESTING
];
238 struct tgsi_full_instruction
*Instructions
;
239 uint NumInstructions
;
241 struct tgsi_full_declaration
*Declarations
;
242 uint NumDeclarations
;
244 struct tgsi_exec_labels Labels
;
248 tgsi_exec_machine_init(
249 struct tgsi_exec_machine
*mach
);
253 tgsi_exec_machine_bind_shader(
254 struct tgsi_exec_machine
*mach
,
255 const struct tgsi_token
*tokens
,
257 struct tgsi_sampler
*samplers
);
260 tgsi_exec_machine_run(
261 struct tgsi_exec_machine
*mach
);
265 tgsi_exec_machine_free_data(struct tgsi_exec_machine
*mach
);
268 #if defined __cplusplus
272 #endif /* TGSI_EXEC_H */