1 /**************************************************************************
2 *
3 * Copyright 2010-2012 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 SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
18 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20 * USE OR OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
24 * of the Software.
25 *
26 **************************************************************************/
27
28
29 #ifndef LP_BLD_LIMITS_H_
30 #define LP_BLD_LIMITS_H_
31
32
33 #include <limits.h>
34
35 #include "pipe/p_state.h"
36 #include "pipe/p_defines.h"
37
38
39 /*
40 * TGSI translation limits.
41 *
42 * Some are slightly above SM 3.0 requirements to give some wiggle room to
43 * the gallium frontends.
44 */
45
46 #define LP_MAX_TGSI_TEMPS 4096
47
48 #define LP_MAX_TGSI_ADDRS 16
49
50 #define LP_MAX_TGSI_IMMEDIATES 4096
51
52 #define LP_MAX_TGSI_CONSTS 4096
53
54 #define LP_MAX_TGSI_CONST_BUFFERS 16
55
56 #define LP_MAX_TGSI_CONST_BUFFER_SIZE (LP_MAX_TGSI_CONSTS * sizeof(float[4]))
57
58 #define LP_MAX_TGSI_SHADER_BUFFERS 16
59
60 #define LP_MAX_TGSI_SHADER_BUFFER_SIZE (1 << 27)
61
62 #define LP_MAX_TGSI_SHADER_IMAGES 16
63
64 /*
65 * For quick access we cache registers in statically
66 * allocated arrays. Here we define the maximum size
67 * for those arrays.
68 */
69 #define LP_MAX_INLINED_TEMPS 256
70
71 #define LP_MAX_INLINED_IMMEDIATES 256
72
73 /**
74 * Maximum control flow nesting
75 *
76 * SM4.0 requires 64 (per subroutine actually, subroutine nesting itself is 32)
77 * SM3.0 requires 24 (most likely per subroutine too)
78 * add 2 more (some translation could add one more)
79 */
80 #define LP_MAX_TGSI_NESTING 66
81
82 /**
83 * Maximum iterations before loop termination
84 * Shared between every loop in a TGSI shader
85 */
86 #define LP_MAX_TGSI_LOOP_ITERATIONS 65535
87
88
89 /**
90 * Some of these limits are actually infinite (i.e., only limited by available
91 * memory), however advertising INT_MAX would cause some test problems to
92 * actually try to allocate the maximum and run out of memory and crash. So
93 * stick with something reasonable here.
94 */
95 static inline int
gallivm_get_shader_param(enum pipe_shader_cap param)96 gallivm_get_shader_param(enum pipe_shader_cap param)
97 {
98 switch(param) {
99 case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
100 case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
101 case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
102 case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
103 return 1 * 1024 * 1024;
104 case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
105 return LP_MAX_TGSI_NESTING;
106 case PIPE_SHADER_CAP_MAX_INPUTS:
107 return 32;
108 case PIPE_SHADER_CAP_MAX_OUTPUTS:
109 return 32;
110 case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
111 return LP_MAX_TGSI_CONST_BUFFER_SIZE;
112 case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
113 return LP_MAX_TGSI_CONST_BUFFERS;
114 case PIPE_SHADER_CAP_MAX_TEMPS:
115 return LP_MAX_TGSI_TEMPS;
116 case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
117 return 1;
118 case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
119 case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
120 case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
121 case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
122 return 1;
123 case PIPE_SHADER_CAP_SUBROUTINES:
124 return 1;
125 case PIPE_SHADER_CAP_INTEGERS:
126 return 1;
127 case PIPE_SHADER_CAP_INT64_ATOMICS:
128 case PIPE_SHADER_CAP_FP16:
129 case PIPE_SHADER_CAP_FP16_DERIVATIVES:
130 case PIPE_SHADER_CAP_INT16:
131 case PIPE_SHADER_CAP_GLSL_16BIT_CONSTS:
132 return 0;
133 case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
134 return PIPE_MAX_SAMPLERS;
135 case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
136 return PIPE_MAX_SHADER_SAMPLER_VIEWS;
137 case PIPE_SHADER_CAP_PREFERRED_IR:
138 return PIPE_SHADER_IR_TGSI;
139 case PIPE_SHADER_CAP_SUPPORTED_IRS:
140 return (1 << PIPE_SHADER_IR_TGSI) | (1 << PIPE_SHADER_IR_NIR);
141 case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
142 case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
143 return 1;
144 case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
145 case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
146 case PIPE_SHADER_CAP_TGSI_LDEXP_SUPPORTED:
147 case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
148 case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
149 case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
150 case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS:
151 case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS:
152 return 0;
153 case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
154 return 32;
155 case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS:
156 return LP_MAX_TGSI_SHADER_BUFFERS;
157 case PIPE_SHADER_CAP_MAX_SHADER_IMAGES:
158 return LP_MAX_TGSI_SHADER_IMAGES;
159 }
160 /* if we get here, we missed a shader cap above (and should have seen
161 * a compiler warning.)
162 */
163 return 0;
164 }
165
166
167 #endif /* LP_BLD_LIMITS_H_ */
168