vc4_qir.h revision d9d1c14430aaeb5b22aa66b269ba288e3df24103 
1/*
2 * Copyright © 2014 Broadcom
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#ifndef VC4_QIR_H
25#define VC4_QIR_H
26
27#include <stdbool.h>
28#include <stdint.h>
29
30#include "util/u_simple_list.h"
31
32enum qfile {
33        QFILE_NULL,
34        QFILE_TEMP,
35        QFILE_VARY,
36        QFILE_UNIF,
37};
38
39struct qreg {
40        enum qfile file;
41        uint32_t index;
42};
43
44enum qop {
45        QOP_UNDEF,
46        QOP_MOV,
47        QOP_FADD,
48        QOP_FSUB,
49        QOP_FMUL,
50        QOP_FMIN,
51        QOP_FMAX,
52        QOP_FMINABS,
53        QOP_FMAXABS,
54
55        QOP_SEQ,
56        QOP_SNE,
57        QOP_SGE,
58        QOP_SLT,
59        QOP_CMP,
60
61        QOP_FTOI,
62        QOP_RCP,
63        QOP_RSQ,
64        QOP_EXP2,
65        QOP_LOG2,
66        QOP_VW_SETUP,
67        QOP_VR_SETUP,
68        QOP_PACK_SCALED,
69        QOP_PACK_COLORS,
70        QOP_VPM_WRITE,
71        QOP_VPM_READ,
72        QOP_TLB_COLOR_WRITE,
73        QOP_VARY_ADD_C,
74};
75
76struct simple_node {
77        struct simple_node *next;
78        struct simple_node *prev;
79};
80
81struct qinst {
82        struct simple_node link;
83
84        enum qop op;
85        struct qreg dst;
86        struct qreg *src;
87};
88
89enum qstage {
90        /**
91         * Coordinate shader, runs during binning, before the VS, and just
92         * outputs position.
93         */
94        QSTAGE_COORD,
95        QSTAGE_VERT,
96        QSTAGE_FRAG,
97};
98
99enum quniform_contents {
100        /**
101         * Indicates that a constant 32-bit value is copied from the program's
102         * uniform contents.
103         */
104        QUNIFORM_CONSTANT,
105        /**
106         * Indicates that the program's uniform contents are used as an index
107         * into the GL uniform storage.
108         */
109        QUNIFORM_UNIFORM,
110
111        /** @{
112         * Scaling factors from clip coordinates to relative to the viewport
113         * center.
114         *
115         * This is used by the coordinate and vertex shaders to produce the
116         * 32-bit entry consisting of 2 16-bit fields with 12.4 signed fixed
117         * point offsets from the viewport ccenter.
118         */
119        QUNIFORM_VIEWPORT_X_SCALE,
120        QUNIFORM_VIEWPORT_Y_SCALE,
121        /** @} */
122};
123
124struct qcompile {
125        struct qreg undef;
126        enum qstage stage;
127        uint32_t num_temps;
128        struct simple_node instructions;
129        uint32_t immediates[1024];
130
131        struct simple_node qpu_inst_list;
132        uint64_t *qpu_insts;
133        uint32_t qpu_inst_count;
134        uint32_t qpu_inst_size;
135};
136
137struct qcompile *qir_compile_init(void);
138void qir_compile_destroy(struct qcompile *c);
139struct qinst *qir_inst(enum qop op, struct qreg dst,
140                       struct qreg src0, struct qreg src1);
141struct qinst *qir_inst4(enum qop op, struct qreg dst,
142                        struct qreg a,
143                        struct qreg b,
144                        struct qreg c,
145                        struct qreg d);
146void qir_emit(struct qcompile *c, struct qinst *inst);
147struct qreg qir_get_temp(struct qcompile *c);
148int qir_get_op_nsrc(enum qop qop);
149bool qir_reg_equals(struct qreg a, struct qreg b);
150bool qir_has_side_effects(struct qinst *inst);
151
152void qir_dump(struct qcompile *c);
153void qir_dump_inst(struct qinst *inst);
154const char *qir_get_stage_name(enum qstage stage);
155
156void qir_optimize(struct qcompile *c);
157bool qir_opt_algebraic(struct qcompile *c);
158bool qir_opt_dead_code(struct qcompile *c);
159
160#define QIR_ALU1(name)                                                   \
161static inline struct qreg                                                \
162qir_##name(struct qcompile *c, struct qreg a)                            \
163{                                                                        \
164        struct qreg t = qir_get_temp(c);                                 \
165        qir_emit(c, qir_inst(QOP_##name, t, a, c->undef));               \
166        return t;                                                        \
167}
168
169#define QIR_ALU2(name)                                                   \
170static inline struct qreg                                                \
171qir_##name(struct qcompile *c, struct qreg a, struct qreg b)             \
172{                                                                        \
173        struct qreg t = qir_get_temp(c);                                 \
174        qir_emit(c, qir_inst(QOP_##name, t, a, b));                      \
175        return t;                                                        \
176}
177
178QIR_ALU1(MOV)
179QIR_ALU2(FADD)
180QIR_ALU2(FSUB)
181QIR_ALU2(FMUL)
182QIR_ALU2(FMIN)
183QIR_ALU2(FMAX)
184QIR_ALU2(FMINABS)
185QIR_ALU2(FMAXABS)
186QIR_ALU1(FTOI)
187QIR_ALU1(RCP)
188QIR_ALU1(RSQ)
189QIR_ALU1(EXP2)
190QIR_ALU1(LOG2)
191QIR_ALU2(PACK_SCALED)
192QIR_ALU1(VARY_ADD_C)
193
194static inline void
195qir_VPM_WRITE(struct qcompile *c, struct qreg a)
196{
197        qir_emit(c, qir_inst(QOP_VPM_WRITE, c->undef, a, c->undef));
198}
199
200#endif /* VC4_QIR_H */
201