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 <[email protected]>
25 */
26
27 #ifndef H_ETNAVIV_ASM
28 #define H_ETNAVIV_ASM
29
30 #include <stdint.h>
31 #include <stdbool.h>
32 #include "util/u_math.h"
33
34 #include <etnaviv/isa/asm.h>
35
36 /* Size of an instruction in 32-bit words */
37 #define ETNA_INST_SIZE (4)
38
39 /* Compose two swizzles (computes swz1.swz2) */
inst_swiz_compose(uint32_t swz1,uint32_t swz2)40 static inline uint32_t inst_swiz_compose(uint32_t swz1, uint32_t swz2)
41 {
42 return SWIZ_X((swz1 >> (((swz2 >> 0)&3)*2))&3) |
43 SWIZ_Y((swz1 >> (((swz2 >> 2)&3)*2))&3) |
44 SWIZ_Z((swz1 >> (((swz2 >> 4)&3)*2))&3) |
45 SWIZ_W((swz1 >> (((swz2 >> 6)&3)*2))&3);
46 };
47
48 /* Compose two write_masks (computes wm1.wm2) */
inst_write_mask_compose(uint32_t wm1,uint32_t wm2)49 static inline uint32_t inst_write_mask_compose(uint32_t wm1, uint32_t wm2)
50 {
51 unsigned wm = 0;
52 for (unsigned i = 0, j = 0; i < 4; i++) {
53 if (wm2 & (1 << i)) {
54 if (wm1 & (1 << j))
55 wm |= (1 << i);
56 j++;
57 }
58 }
59 return wm;
60 };
61
62 /* Return whether the rgroup is one of the uniforms */
63 static inline int
etna_rgroup_is_uniform(enum isa_reg_group rgroup)64 etna_rgroup_is_uniform(enum isa_reg_group rgroup)
65 {
66 return rgroup == ISA_REG_GROUP_UNIFORM_0 ||
67 rgroup == ISA_REG_GROUP_UNIFORM_1;
68 }
69
70 static inline struct etna_inst_src
etna_immediate_src(unsigned type,uint32_t bits)71 etna_immediate_src(unsigned type, uint32_t bits)
72 {
73 return (struct etna_inst_src) {
74 .use = 1,
75 .rgroup = ISA_REG_GROUP_IMMED,
76 .imm_val = bits,
77 .imm_type = type
78 };
79 }
80
81 static inline struct etna_inst_src
etna_immediate_float(float x)82 etna_immediate_float(float x)
83 {
84 uint32_t bits = fui(x);
85 assert((bits & 0xfff) == 0); /* 12 lsb cut off */
86 return etna_immediate_src(0, bits >> 12);
87 }
88
89 static inline struct etna_inst_src
etna_immediate_int(int x)90 etna_immediate_int(int x)
91 {
92 assert(x >= -0x80000 && x < 0x80000); /* 20-bit signed int */
93 return etna_immediate_src(1, x);
94 }
95
96 /**
97 * Build vivante instruction from structure with
98 * opcode, cond, sat, dst_use, dst_amode,
99 * dst_reg, dst_comps, tex_id, tex_amode, tex_swiz,
100 * src[0-2]_reg, use, swiz, neg, abs, amode, rgroup,
101 * imm
102 *
103 * Return 0 if successful, and a non-zero
104 * value otherwise.
105 */
106 int
107 etna_assemble(uint32_t *out, const struct etna_inst *inst, bool has_no_oneconst_limit);
108
109 #endif
110