2 * Copyright (C) 2019 Connor Abbott <cwabbott0@gmail.com>
3 * Copyright (C) 2019 Lyude Paul <thatslyude@gmail.com>
4 * Copyright (C) 2019 Ryan Houdek <Sonicadvance1@gmail.com>
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 enum bifrost_clause_type
{
33 BIFROST_CLAUSE_NONE
= 0,
34 BIFROST_CLAUSE_LOAD_VARY
= 1,
35 BIFROST_CLAUSE_UBO
= 2,
36 BIFROST_CLAUSE_TEX
= 3,
37 BIFROST_CLAUSE_SSBO_LOAD
= 5,
38 BIFROST_CLAUSE_SSBO_STORE
= 6,
39 BIFROST_CLAUSE_BLEND
= 9,
40 BIFROST_CLAUSE_ATEST
= 13,
41 BIFROST_CLAUSE_64BIT
= 15
44 struct bifrost_header
{
46 // If true, convert any infinite result of any floating-point operation to
47 // the biggest representable number.
48 unsigned suppress_inf
: 1;
49 // Convert any NaN results to 0.
50 unsigned suppress_nan
: 1;
52 // true if the execution mask of the next clause is the same as the mask of
53 // the current clause.
54 unsigned back_to_back
: 1;
55 unsigned no_end_of_shader
: 1;
57 // Set to true for fragment shaders, to implement this bit of spec text
58 // from section 7.1.5 of the GLSL ES spec:
60 // "Stores to image and buffer variables performed by helper invocations
61 // have no effect on the underlying image or buffer memory."
63 // Helper invocations are threads (invocations) corresponding to pixels in
64 // a quad that aren't actually part of the triangle, but are included to
65 // make derivatives work correctly. They're usually turned on, but they
66 // need to be masked off for GLSL-level stores. This bit seems to be the
67 // only bit that's actually different between fragment shaders and other
68 // shaders, so this is probably what it's doing.
69 unsigned elide_writes
: 1;
70 // If backToBack is off:
71 // - true for conditional branches and fallthrough
72 // - false for unconditional branches
73 // The blob seems to always set it to true if back-to-back is on.
74 unsigned branch_cond
: 1;
75 // This bit is set when the next clause writes to the data register of some
77 unsigned datareg_writebarrier
: 1;
79 unsigned scoreboard_deps
: 8;
80 unsigned scoreboard_index
: 3;
81 enum bifrost_clause_type clause_type
: 4;
82 unsigned unk3
: 1; // part of clauseType?
83 enum bifrost_clause_type next_clause_type
: 4;
84 unsigned unk4
: 1; // part of nextClauseType?
85 } __attribute__((packed
));
87 enum bifrost_packed_src
{
88 BIFROST_SRC_PORT0
= 0,
89 BIFROST_SRC_PORT1
= 1,
90 BIFROST_SRC_PORT3
= 2,
91 BIFROST_SRC_STAGE
= 3,
92 BIFROST_SRC_CONST_LO
= 4,
93 BIFROST_SRC_CONST_HI
= 5,
94 BIFROST_SRC_PASS_FMA
= 6,
95 BIFROST_SRC_PASS_ADD
= 7,
98 #define BIFROST_FMA_EXT (0xe0000)
99 #define BIFROST_FMA_OP_MOV BIFROST_FMA_EXT | (0x32d)
101 struct bifrost_fma_inst
{
104 } __attribute__((packed
));
106 struct bifrost_fma_2src
{
110 } __attribute__((packed
));
112 #define BIFROST_ADD_OP_BLEND (0x1952c)
113 #define BIFROST_ADD_OP_FRCP_FAST_F32 (0x0cc00)
114 #define BIFROST_ADD_OP_FRCP_FAST_F16_X (0x0ce10)
115 #define BIFROST_ADD_OP_FRCP_FAST_F16_Y (0x0ce30)
116 #define BIFROST_ADD_OP_FRSQ_FAST_F32 (0x0cc20)
117 #define BIFROST_ADD_OP_FRSQ_FAST_F16_X (0x0ce50)
118 #define BIFROST_ADD_OP_FRSQ_FAST_F16_Y (0x0ce70)
120 struct bifrost_add_inst
{
123 } __attribute__((packed
));
125 #define BIFROST_ADD_OP_LD_UBO_1 (0x0c1a0 >> 3)
126 #define BIFROST_ADD_OP_LD_UBO_2 (0x0c1e0 >> 3)
127 #define BIFROST_ADD_OP_LD_UBO_3 (0x0caa0 >> 3)
128 #define BIFROST_ADD_OP_LD_UBO_4 (0x0c220 >> 3)
130 struct bifrost_add_2src
{
134 } __attribute__((packed
));
136 #define BIFROST_ADD_OP_FMAX32 (0x00)
137 #define BIFROST_ADD_OP_FMIN32 (0x01)
138 #define BIFROST_ADD_OP_FADD32 (0x02)
140 struct bifrost_add_faddmin
{
143 unsigned src1_abs
: 1;
144 unsigned src0_neg
: 1;
145 unsigned src1_neg
: 1;
149 unsigned src0_abs
: 1;
151 } __attribute__((packed
));
153 #define BIFROST_ADD_OP_ST_VAR (0x19300 >> 8)
155 struct bifrost_st_vary
{
159 unsigned channels
: 2;
161 } __attribute__((packed
));
163 #define BIFROST_ADD_OP_ATEST (0xc8f)
165 struct bifrost_add_atest
{
166 /* gl_SampleMask (R60) */
172 /* If half, X/Y select. If !half, always set */
173 unsigned component
: 1;
177 } __attribute__((packed
));
179 enum bifrost_outmod
{
182 BIFROST_SAT_SIGNED
= 0x2,
186 enum bifrost_roundmode
{
187 BIFROST_RTE
= 0x0, /* round to even */
188 BIFROST_RTP
= 0x1, /* round to positive */
189 BIFROST_RTN
= 0x2, /* round to negative */
190 BIFROST_RTZ
= 0x3 /* round to zero */
193 /* NONE: Same as fmax() and fmin() -- return the other
194 * number if any number is NaN. Also always return +0 if
195 * one argument is +0 and the other is -0.
197 * NAN_WINS: Instead of never returning a NaN, always return
198 * one. The "greater"/"lesser" NaN is always returned, first
199 * by checking the sign and then the mantissa bits.
201 * SRC1_WINS: For max, implement src0 > src1 ? src0 : src1.
202 * For min, implement src0 < src1 ? src0 : src1. This
203 * includes handling NaN's and signedness of 0 differently
204 * from above, since +0 and -0 compare equal and comparisons
205 * always return false for NaN's. As a result, this mode is
208 * SRC0_WINS: For max, implement src0 < src1 ? src1 : src0
209 * For min, implement src0 > src1 ? src1 : src0
213 enum bifrost_minmax_mode
{
214 BIFROST_MINMAX_NONE
= 0x0,
215 BIFROST_NAN_WINS
= 0x1,
216 BIFROST_SRC1_WINS
= 0x2,
217 BIFROST_SRC0_WINS
= 0x3,
220 #define BIFROST_FMA_OP_FADD32 (0x58 >> 2)
221 #define BIFROST_FMA_OP_FMAX32 (0x40 >> 2)
222 #define BIFROST_FMA_OP_FMIN32 (0x44 >> 2)
224 struct bifrost_fma_add
{
227 unsigned src1_abs
: 1;
228 unsigned src0_neg
: 1;
229 unsigned src1_neg
: 1;
231 unsigned src0_abs
: 1;
232 enum bifrost_roundmode roundmode
: 2;
233 enum bifrost_outmod outmod
: 2;
235 } __attribute__((packed
));
237 #define BIFROST_FMA_OP_FMAX16 (0xC0 >> 2)
238 #define BIFROST_FMA_OP_FMIN16 (0xCC >> 2)
239 #define BIFROST_FMA_OP_FADD16 (0xD8 >> 2)
241 struct bifrost_fma_add_minmax16
{
244 /* abs2 inferred as (src1 < src0) */
246 unsigned src0_neg
: 1;
247 unsigned src1_neg
: 1;
248 unsigned src0_swizzle
: 2;
249 unsigned src1_swizzle
: 2;
251 enum bifrost_outmod outmod
: 2;
252 /* roundmode for add, min/max mode for min/max */
254 } __attribute__((packed
));
256 #define BIFROST_FMA_OP_FMA (0x00)
258 struct bifrost_fma_fma
{
262 unsigned src_expand
: 3;
263 unsigned src0_abs
: 1;
264 enum bifrost_roundmode roundmode
: 2;
265 enum bifrost_outmod outmod
: 2;
266 unsigned src0_neg
: 1; /* 14 */
267 unsigned src2_neg
: 1;
268 unsigned src1_abs
: 1;
269 unsigned src2_abs
: 1; /* 17 */
271 } __attribute__((packed
));
273 #define BIFROST_FMA_OP_FMA16 (0x2)
275 struct bifrost_fma_fma16
{
279 unsigned swizzle_0
: 2;
280 unsigned swizzle_1
: 2;
281 enum bifrost_roundmode roundmode
: 2;
282 enum bifrost_outmod outmod
: 2;
283 unsigned src0_neg
: 1;
284 unsigned src2_neg
: 1;
285 unsigned swizzle_2
: 2;
287 } __attribute__((packed
));
289 enum bifrost_csel_cond
{
300 #define BIFROST_FMA_OP_CSEL4 (0x5c)
301 #define BIFROST_FMA_OP_CSEL4_V16 (0xdc)
303 struct bifrost_csel4
{
308 enum bifrost_csel_cond cond
: 3;
310 } __attribute__((packed
));
312 struct bifrost_shift_fma
{
316 unsigned half
: 3; /* 000 for i32, 100 for i8, 111 for v2i16 */
317 unsigned unk
: 1; /* always set? */
318 unsigned invert_1
: 1; /* Inverts sources to combining op */
319 /* For XOR, switches RSHIFT to LSHIFT since only one invert needed */
320 unsigned invert_2
: 1;
322 } __attribute__((packed
));
324 struct bifrost_shift_add
{
330 unsigned invert_1
: 1;
331 unsigned invert_2
: 1;
334 } __attribute__((packed
));
336 #define BIFROST_FMA_INT16_TO_32 (0xe0198 >> 3)
338 struct bifrost_fma_int16_to_32
{
340 unsigned is_unsigned
: 1;
341 unsigned swizzle
: 1;
342 unsigned to_float
: 1;
344 } __attribute__((packed
));
346 /* We could combine but it's easier to just use FMA_ONE_SRC */
347 #define BIFROST_FMA_FLOAT16_TO_32(y) (0xe01a2 | ((y) ? 1 : 0))
349 /* Two sources for vectorization */
350 #define BIFROST_FMA_FLOAT32_TO_16 (0xdd000 >> 3)
352 /* Again we could combine but easier to just ONE_SRC with an
353 * argumnt for unsignedness */
354 #define BIFROST_FMA_FLOAT32_TO_INT(u) (0xe0136 | ((u) ? 1 : 0))
355 #define BIFROST_FMA_INT_TO_FLOAT32(u) (0xe0178 | ((u) ? 1 : 0))
357 /* Used for f2i16 and i2f16 */
358 #define BIFROST_FMA_F2I16 (0xe00)
360 struct bifrost_fma_f2i_i2f16
{
362 unsigned is_unsigned
: 1;
363 unsigned direction
: 2; /* 00 for i2f, 11 for f2i */
364 unsigned swizzle
: 2;
365 unsigned unk
: 2; /* always 10 */
366 unsigned direction_2
: 1; /* 0 for f2i, 1 for i2f */
368 } __attribute__((packed
));
370 enum bifrost_ldst_type
{
371 BIFROST_LDST_F16
= 0,
372 BIFROST_LDST_F32
= 1,
373 BIFROST_LDST_I32
= 2,
377 #define BIFROST_ADD_OP_LD_VAR_ADDR (0x18000 >> 10)
379 struct bifrost_ld_var_addr
{
382 unsigned location
: 5;
383 enum bifrost_ldst_type type
: 2;
385 } __attribute__((packed
));
387 #define BIFROST_ADD_OP_LD_ATTR (0x08000 >> 12)
389 struct bifrost_ld_attr
{
392 unsigned location
: 5;
393 unsigned channels
: 2; /* MALI_POSITIVE */
394 enum bifrost_ldst_type type
: 2;
396 } __attribute__((packed
));
398 enum bifrost_interp_mode
{
399 BIFROST_INTERP_PER_FRAG
= 0x0,
400 BIFROST_INTERP_CENTROID
= 0x1,
401 BIFROST_INTERP_DEFAULT
= 0x2,
402 BIFROST_INTERP_EXPLICIT
= 0x3
405 #define BIFROST_ADD_OP_LD_VAR_16 (0x1a << 1)
406 #define BIFROST_ADD_OP_LD_VAR_32 (0x0a << 1)
408 struct bifrost_ld_var
{
411 /* If top two bits set, indirect with src in bottom three */
414 unsigned channels
: 2; /* MALI_POSITIVE */
415 enum bifrost_interp_mode interp_mode
: 2;
419 } __attribute__((packed
));
421 struct bifrost_tex_ctrl
{
422 unsigned sampler_index
: 4; // also used to signal indirects
423 unsigned tex_index
: 7;
424 bool no_merge_index
: 1; // whether to merge (direct) sampler & texture indices
425 bool filter
: 1; // use the usual filtering pipeline (0 for texelFetch & textureGather)
427 bool texel_offset
: 1; // *Offset()
430 unsigned tex_type
: 2; // 2D, 3D, Cube, Buffer
431 bool compute_lod
: 1; // 0 for *Lod()
432 bool not_supply_lod
: 1; // 0 for *Lod() or when a bias is applied
433 bool calc_gradients
: 1; // 0 for *Grad()
435 unsigned result_type
: 4; // integer, unsigned, float TODO: why is this 4 bits?
437 } __attribute__((packed
));
439 struct bifrost_dual_tex_ctrl
{
440 unsigned sampler_index0
: 2;
442 unsigned tex_index0
: 2;
443 unsigned sampler_index1
: 2;
444 unsigned tex_index1
: 2;
446 } __attribute__((packed
));
448 enum branch_bit_size
{
452 // For the above combinations of bitsize and location, an extra bit is
453 // encoded via comparing the sources. The only possible source of ambiguity
454 // would be if the sources were the same, but then the branch condition
455 // would be always true or always false anyways, so we can ignore it. But
456 // this no longer works when comparing the y component to the x component,
457 // since it's valid to compare the y component of a source against its own
458 // x component. Instead, the extra bit is encoded via an extra bitsize.
461 BR_SIZE_32_AND_16X
= 5,
462 BR_SIZE_32_AND_16Y
= 6,
463 // Used for comparisons with zero and always-true, see below. I think this
464 // only works for integer comparisons.
468 enum bifrost_reg_write_unit
{
469 REG_WRITE_NONE
= 0, // don't write
470 REG_WRITE_TWO
, // write using reg2
471 REG_WRITE_THREE
, // write using reg3
474 struct bifrost_regs
{
475 unsigned uniform_const
: 8;
481 } __attribute__((packed
));
483 enum bifrost_branch_cond
{
488 // Equal vs. not-equal determined by src0/src1 comparison
490 // floating-point comparisons
491 // Becomes UNE when you flip the arguments
493 // TODO what happens when you flip the arguments?
498 enum bifrost_branch_code
{
502 struct bifrost_branch
{
505 /* For BR_SIZE_ZERO, upper two bits become ctrl */
508 /* Offset source -- always uniform/const but
509 * theoretically could support indirect jumps? */
512 enum bifrost_branch_cond cond
: 3;
513 enum branch_bit_size size
: 3;
520 #define BIFROST_FMA_NOP (0x701960 | BIFROST_SRC_STAGE)
521 #define BIFROST_ADD_NOP (0x3D960 | BIFROST_SRC_STAGE)
523 struct bifrost_fmt1
{
528 uint64_t header
: 45;
529 } __attribute__((packed
));
531 #define BIFROST_FMT1_INSTRUCTIONS 0b00101
532 #define BIFROST_FMT1_FINAL 0b01001
533 #define BIFROST_FMT1_CONSTANTS 0b00001
535 #define BIFROST_FMTC_CONSTANTS 0b0011
536 #define BIFROST_FMTC_FINAL 0b0111
538 struct bifrost_fmt_constant
{
543 } __attribute__((packed
));
545 enum bifrost_reg_control
{
546 BIFROST_WRITE_FMA_P2
= 1,
547 BIFROST_WRITE_FMA_P2_READ_P3
= 2,
548 BIFROST_FIRST_WRITE_FMA_P2_READ_P3
= 3,
550 BIFROST_WRITE_ADD_P2
= 5,
551 BIFROST_WRITE_ADD_P2_READ_P3
= 6,
552 BIFROST_WRITE_ADD_P2_FMA_P3
= 7,
554 BIFROST_FIRST_NONE
= 8,
555 BIFROST_FIRST_WRITE_FMA_P2
= 9,
556 /* INSTR_INVALID_ENC */
557 BIFROST_REG_NONE
= 11,
558 BIFROST_FIRST_READ_P3
= 12,
559 BIFROST_FIRST_WRITE_ADD_P2
= 13,
560 BIFROST_FIRST_WRITE_ADD_P2_READ_P3
= 14,
561 BIFROST_FIRST_WRITE_ADD_P2_FMA_P3
= 15