1 /*
2 * Copyright (c) 2012-2015 Etnaviv Project
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, sub license,
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
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the 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 NON-INFRINGEMENT. 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
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Wladimir J. van der Laan <laanwj@gmail.com>
25 */
26
27 #ifndef H_ETNAVIV_ASM
28 #define H_ETNAVIV_ASM
29
30 #include <stdint.h>
31 #include "hw/isa.xml.h"
32
33 /* Size of an instruction in 32-bit words */
34 #define ETNA_INST_SIZE (4)
35 /* Number of source operands per instruction */
36 #define ETNA_NUM_SRC (3)
37
38 /* Broadcast swizzle to all four components */
39 #define INST_SWIZ_BROADCAST(x) \
40 (INST_SWIZ_X(x) | INST_SWIZ_Y(x) | INST_SWIZ_Z(x) | INST_SWIZ_W(x))
41 /* Identity (NOP) swizzle */
42 #define INST_SWIZ_IDENTITY \
43 (INST_SWIZ_X(0) | INST_SWIZ_Y(1) | INST_SWIZ_Z(2) | INST_SWIZ_W(3))
44 /* Fully specified swizzle */
45 #define INST_SWIZ(x,y,z,w) \
46 (INST_SWIZ_X(x) | INST_SWIZ_Y(y) | INST_SWIZ_Z(z) | INST_SWIZ_W(w))
47 #define SWIZZLE(c0,c1,c2,c3) \
48 INST_SWIZ(INST_SWIZ_COMP_##c0, \
49 INST_SWIZ_COMP_##c1, \
50 INST_SWIZ_COMP_##c2, \
51 INST_SWIZ_COMP_##c3)
52
53 /*** operands ***/
54
55 /* destination operand */
56 struct etna_inst_dst {
57 unsigned use:1; /* 0: not in use, 1: in use */
58 unsigned amode:3; /* INST_AMODE_* */
59 unsigned reg:7; /* register number 0..127 */
60 unsigned comps:4; /* INST_COMPS_* */
61 };
62
63 /* texture operand */
64 struct etna_inst_tex {
65 unsigned id:5; /* sampler id */
66 unsigned amode:3; /* INST_AMODE_* */
67 unsigned swiz:8; /* INST_SWIZ */
68 };
69
70 /* source operand */
71 struct etna_inst_src {
72 unsigned use:1; /* 0: not in use, 1: in use */
73 unsigned reg:9; /* register or uniform number 0..511 */
74 unsigned swiz:8; /* INST_SWIZ */
75 unsigned neg:1; /* negate (flip sign) if set */
76 unsigned abs:1; /* absolute (remove sign) if set */
77 unsigned amode:3; /* INST_AMODE_* */
78 unsigned rgroup:3; /* INST_RGROUP_* */
79 };
80
81 /*** instruction ***/
82 struct etna_inst {
83 uint8_t opcode; /* INST_OPCODE_* */
84 uint8_t type; /* INST_TYPE_* */
85 unsigned cond:5; /* INST_CONDITION_* */
86 unsigned sat:1; /* saturate result between 0..1 */
87 struct etna_inst_dst dst; /* destination operand */
88 struct etna_inst_tex tex; /* texture operand */
89 struct etna_inst_src src[ETNA_NUM_SRC]; /* source operand */
90 unsigned imm; /* takes place of src[2] for BRANCH/CALL */
91 };
92
93 /* Compose two swizzles (computes swz1.swz2) */
inst_swiz_compose(uint32_t swz1,uint32_t swz2)94 static inline uint32_t inst_swiz_compose(uint32_t swz1, uint32_t swz2)
95 {
96 return INST_SWIZ_X((swz1 >> (((swz2 >> 0)&3)*2))&3) |
97 INST_SWIZ_Y((swz1 >> (((swz2 >> 2)&3)*2))&3) |
98 INST_SWIZ_Z((swz1 >> (((swz2 >> 4)&3)*2))&3) |
99 INST_SWIZ_W((swz1 >> (((swz2 >> 6)&3)*2))&3);
100 };
101
102 /* Return whether the rgroup is one of the uniforms */
103 static inline int
etna_rgroup_is_uniform(unsigned rgroup)104 etna_rgroup_is_uniform(unsigned rgroup)
105 {
106 return rgroup == INST_RGROUP_UNIFORM_0 ||
107 rgroup == INST_RGROUP_UNIFORM_1;
108 }
109
110 /**
111 * Build vivante instruction from structure with
112 * opcode, cond, sat, dst_use, dst_amode,
113 * dst_reg, dst_comps, tex_id, tex_amode, tex_swiz,
114 * src[0-2]_reg, use, swiz, neg, abs, amode, rgroup,
115 * imm
116 *
117 * Return 0 if successful, and a non-zero
118 * value otherwise.
119 */
120 int
121 etna_assemble(uint32_t *out, const struct etna_inst *inst);
122
123 /**
124 * Set field imm of already-assembled instruction.
125 * This is used for filling in jump destinations in a separate pass.
126 */
127 static inline void
etna_assemble_set_imm(uint32_t * out,uint32_t imm)128 etna_assemble_set_imm(uint32_t *out, uint32_t imm)
129 {
130 out[3] |= VIV_ISA_WORD_3_SRC2_IMM(imm);
131 }
132
133 #endif
134