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1 /*
2  * Copyright © 2015 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  */
23 
24 #pragma once
25 
26 #include "brw_reg.h"
27 #include "compiler/nir/nir.h"
28 #include "brw_compiler.h"
29 
30 #ifdef __cplusplus
31 extern "C" {
32 #endif
33 
34 int type_size_scalar(const struct glsl_type *type);
35 int type_size_vec4(const struct glsl_type *type);
36 int type_size_dvec4(const struct glsl_type *type);
37 
38 static inline int
type_size_scalar_bytes(const struct glsl_type * type)39 type_size_scalar_bytes(const struct glsl_type *type)
40 {
41    return type_size_scalar(type) * 4;
42 }
43 
44 static inline int
type_size_vec4_bytes(const struct glsl_type * type)45 type_size_vec4_bytes(const struct glsl_type *type)
46 {
47    return type_size_vec4(type) * 16;
48 }
49 
50 /* Flags set in the instr->pass_flags field by i965 analysis passes */
51 enum {
52    BRW_NIR_NON_BOOLEAN           = 0x0,
53 
54    /* Indicates that the given instruction's destination is a boolean
55     * value but that it needs to be resolved before it can be used.
56     * On Gen <= 5, CMP instructions return a 32-bit value where the bottom
57     * bit represents the actual true/false value of the compare and the top
58     * 31 bits are undefined.  In order to use this value, we have to do a
59     * "resolve" operation by replacing the value of the CMP with -(x & 1)
60     * to sign-extend the bottom bit to 0/~0.
61     */
62    BRW_NIR_BOOLEAN_NEEDS_RESOLVE = 0x1,
63 
64    /* Indicates that the given instruction's destination is a boolean
65     * value that has intentionally been left unresolved.  Not all boolean
66     * values need to be resolved immediately.  For instance, if we have
67     *
68     *    CMP r1 r2 r3
69     *    CMP r4 r5 r6
70     *    AND r7 r1 r4
71     *
72     * We don't have to resolve the result of the two CMP instructions
73     * immediately because the AND still does an AND of the bottom bits.
74     * Instead, we can save ourselves instructions by delaying the resolve
75     * until after the AND.  The result of the two CMP instructions is left
76     * as BRW_NIR_BOOLEAN_UNRESOLVED.
77     */
78    BRW_NIR_BOOLEAN_UNRESOLVED    = 0x2,
79 
80    /* Indicates a that the given instruction's destination is a boolean
81     * value that does not need a resolve.  For instance, if you AND two
82     * values that are BRW_NIR_BOOLEAN_NEEDS_RESOLVE then we know that both
83     * values will be 0/~0 before we get them and the result of the AND is
84     * also guaranteed to be 0/~0 and does not need a resolve.
85     */
86    BRW_NIR_BOOLEAN_NO_RESOLVE    = 0x3,
87 
88    /* A mask to mask the boolean status values off of instr->pass_flags */
89    BRW_NIR_BOOLEAN_MASK          = 0x3,
90 };
91 
92 void brw_nir_analyze_boolean_resolves(nir_shader *nir);
93 
94 nir_shader *brw_preprocess_nir(const struct brw_compiler *compiler,
95                                nir_shader *nir);
96 
97 bool brw_nir_lower_intrinsics(nir_shader *nir,
98                               struct brw_stage_prog_data *prog_data);
99 void brw_nir_lower_vs_inputs(nir_shader *nir,
100                              bool is_scalar,
101                              bool use_legacy_snorm_formula,
102                              const uint8_t *vs_attrib_wa_flags);
103 void brw_nir_lower_vue_inputs(nir_shader *nir, bool is_scalar,
104                               const struct brw_vue_map *vue_map);
105 void brw_nir_lower_tes_inputs(nir_shader *nir, const struct brw_vue_map *vue);
106 void brw_nir_lower_fs_inputs(nir_shader *nir,
107                              const struct gen_device_info *devinfo,
108                              const struct brw_wm_prog_key *key);
109 void brw_nir_lower_vue_outputs(nir_shader *nir, bool is_scalar);
110 void brw_nir_lower_tcs_outputs(nir_shader *nir, const struct brw_vue_map *vue,
111                                GLenum tes_primitive_mode);
112 void brw_nir_lower_fs_outputs(nir_shader *nir);
113 void brw_nir_lower_cs_shared(nir_shader *nir);
114 
115 nir_shader *brw_postprocess_nir(nir_shader *nir,
116                                 const struct brw_compiler *compiler,
117                                 bool is_scalar);
118 
119 bool brw_nir_apply_attribute_workarounds(nir_shader *nir,
120                                          bool use_legacy_snorm_formula,
121                                          const uint8_t *attrib_wa_flags);
122 
123 bool brw_nir_apply_trig_workarounds(nir_shader *nir);
124 
125 void brw_nir_apply_tcs_quads_workaround(nir_shader *nir);
126 
127 nir_shader *brw_nir_apply_sampler_key(nir_shader *nir,
128                                       const struct brw_compiler *compiler,
129                                       const struct brw_sampler_prog_key_data *key,
130                                       bool is_scalar);
131 
132 enum brw_reg_type brw_type_for_nir_type(nir_alu_type type);
133 
134 enum glsl_base_type brw_glsl_base_type_for_nir_type(nir_alu_type type);
135 
136 void brw_nir_setup_glsl_uniforms(nir_shader *shader,
137                                  const struct gl_program *prog,
138                                  struct brw_stage_prog_data *stage_prog_data,
139                                  bool is_scalar);
140 
141 void brw_nir_setup_arb_uniforms(nir_shader *shader, struct gl_program *prog,
142                                 struct brw_stage_prog_data *stage_prog_data);
143 
144 bool brw_nir_opt_peephole_ffma(nir_shader *shader);
145 
146 #define BRW_NIR_FRAG_OUTPUT_INDEX_SHIFT 0
147 #define BRW_NIR_FRAG_OUTPUT_INDEX_MASK INTEL_MASK(0, 0)
148 #define BRW_NIR_FRAG_OUTPUT_LOCATION_SHIFT 1
149 #define BRW_NIR_FRAG_OUTPUT_LOCATION_MASK INTEL_MASK(31, 1)
150 
151 #ifdef __cplusplus
152 }
153 #endif
154