2 * Copyright (C) 2014 Rob Clark <robclark@freedesktop.org>
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:
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
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Rob Clark <robclark@freedesktop.org>
32 #include "c11/threads.h"
33 #include "compiler/shader_enums.h"
34 #include "compiler/nir/nir.h"
35 #include "util/bitscan.h"
36 #include "util/disk_cache.h"
38 #include "ir3_compiler.h"
42 /* driver param indices: */
43 enum ir3_driver_param
{
44 /* compute shader driver params: */
45 IR3_DP_NUM_WORK_GROUPS_X
= 0,
46 IR3_DP_NUM_WORK_GROUPS_Y
= 1,
47 IR3_DP_NUM_WORK_GROUPS_Z
= 2,
48 IR3_DP_LOCAL_GROUP_SIZE_X
= 4,
49 IR3_DP_LOCAL_GROUP_SIZE_Y
= 5,
50 IR3_DP_LOCAL_GROUP_SIZE_Z
= 6,
51 /* NOTE: gl_NumWorkGroups should be vec4 aligned because
52 * glDispatchComputeIndirect() needs to load these from
53 * the info->indirect buffer. Keep that in mind when/if
54 * adding any addition CS driver params.
56 IR3_DP_CS_COUNT
= 8, /* must be aligned to vec4 */
58 /* vertex shader driver params: */
60 IR3_DP_VTXID_BASE
= 1,
61 IR3_DP_INSTID_BASE
= 2,
62 IR3_DP_VTXCNT_MAX
= 3,
63 /* user-clip-plane components, up to 8x vec4's: */
67 IR3_DP_VS_COUNT
= 36 /* must be aligned to vec4 */
70 #define IR3_MAX_SHADER_BUFFERS 32
71 #define IR3_MAX_SHADER_IMAGES 32
72 #define IR3_MAX_SO_BUFFERS 4
73 #define IR3_MAX_SO_STREAMS 4
74 #define IR3_MAX_SO_OUTPUTS 64
75 #define IR3_MAX_UBO_PUSH_RANGES 32
78 * Description of a lowered UBO.
81 uint32_t block
; /* Which constant block */
82 uint16_t bindless_base
; /* For bindless, which base register is used */
87 * Description of a range of a lowered UBO access.
89 * Drivers should not assume that there are not multiple disjoint
90 * lowered ranges of a single UBO.
92 struct ir3_ubo_range
{
93 struct ir3_ubo_info ubo
;
94 uint32_t offset
; /* start offset to push in the const register file */
95 uint32_t start
, end
; /* range of block that's actually used */
98 struct ir3_ubo_analysis_state
{
99 struct ir3_ubo_range range
[IR3_MAX_UBO_PUSH_RANGES
];
100 uint32_t num_enabled
;
102 uint32_t cmdstream_size
; /* for per-gen backend to stash required cmdstream size */
106 * Describes the layout of shader consts. This includes:
107 * + User consts + driver lowered UBO ranges
109 * + Image sizes/dimensions
110 * + Driver params (ie. IR3_DP_*)
111 * + TFBO addresses (for generations that do not have hardware streamout)
112 * + Lowered immediates
114 * For consts needed to pass internal values to shader which may or may not
115 * be required, rather than allocating worst-case const space, we scan the
116 * shader and allocate consts as-needed:
118 * + SSBO sizes: only needed if shader has a get_buffer_size intrinsic
121 * + Image dimensions: needed to calculate pixel offset, but only for
122 * images that have a image_store intrinsic
124 * Layout of constant registers, each section aligned to vec4. Note
125 * that pointer size (ubo, etc) changes depending on generation.
130 * if (vertex shader) {
131 * driver params (IR3_DP_*)
132 * if (stream_output.num_outputs > 0)
133 * stream-out addresses
134 * } else if (compute_shader) {
135 * driver params (IR3_DP_*)
139 * Immediates go last mostly because they are inserted in the CP pass
140 * after the nir -> ir3 frontend.
142 * Note UBO size in bytes should be aligned to vec4
144 struct ir3_const_state
{
146 unsigned num_driver_params
; /* scalar */
149 /* user const start at zero */
151 /* NOTE that a3xx might need a section for SSBO addresses too */
154 unsigned driver_param
;
156 unsigned primitive_param
;
157 unsigned primitive_map
;
162 uint32_t mask
; /* bitmask of SSBOs that have get_buffer_size */
163 uint32_t count
; /* number of consts allocated */
164 /* one const allocated per SSBO which has get_buffer_size,
165 * ssbo_sizes.off[ssbo_id] is offset from start of ssbo_sizes
168 uint32_t off
[IR3_MAX_SHADER_BUFFERS
];
172 uint32_t mask
; /* bitmask of images that have image_store */
173 uint32_t count
; /* number of consts allocated */
174 /* three const allocated per image which has image_store:
175 * + cpp (bytes per pixel)
177 * + array_pitch (z pitch)
179 uint32_t off
[IR3_MAX_SHADER_IMAGES
];
182 unsigned immediate_idx
;
183 unsigned immediates_count
;
184 unsigned immediates_size
;
189 /* State of ubo access lowered to push consts: */
190 struct ir3_ubo_analysis_state ubo_state
;
194 * A single output for vertex transform feedback.
196 struct ir3_stream_output
{
197 unsigned register_index
:6; /**< 0 to 63 (OUT index) */
198 unsigned start_component
:2; /** 0 to 3 */
199 unsigned num_components
:3; /** 1 to 4 */
200 unsigned output_buffer
:3; /**< 0 to PIPE_MAX_SO_BUFFERS */
201 unsigned dst_offset
:16; /**< offset into the buffer in dwords */
202 unsigned stream
:2; /**< 0 to 3 */
206 * Stream output for vertex transform feedback.
208 struct ir3_stream_output_info
{
209 unsigned num_outputs
;
210 /** stride for an entire vertex for each buffer in dwords */
211 uint16_t stride
[IR3_MAX_SO_BUFFERS
];
214 * Array of stream outputs, in the order they are to be written in.
215 * Selected components are tightly packed into the output buffer.
217 struct ir3_stream_output output
[IR3_MAX_SO_OUTPUTS
];
222 * Starting from a4xx, HW supports pre-dispatching texture sampling
223 * instructions prior to scheduling a shader stage, when the
224 * coordinate maps exactly to an output of the previous stage.
228 * There is a limit in the number of pre-dispatches allowed for any
231 #define IR3_MAX_SAMPLER_PREFETCH 4
234 * This is the output stream value for 'cmd', as used by blob. It may
235 * encode the return type (in 3 bits) but it hasn't been verified yet.
237 #define IR3_SAMPLER_PREFETCH_CMD 0x4
238 #define IR3_SAMPLER_BINDLESS_PREFETCH_CMD 0x6
241 * Stream output for texture sampling pre-dispatches.
243 struct ir3_sampler_prefetch
{
247 uint16_t samp_bindless_id
;
248 uint16_t tex_bindless_id
;
251 uint8_t half_precision
;
256 /* Configuration key used to identify a shader variant.. different
257 * shader variants can be used to implement features not supported
258 * in hw (two sided color), binning-pass vertex shader, etc.
260 * When adding to this struct, please update ir3_shader_variant()'s debug
263 struct ir3_shader_key
{
267 * Combined Vertex/Fragment shader parameters:
269 unsigned ucp_enables
: 8;
271 /* do we need to check {v,f}saturate_{s,t,r}? */
272 unsigned has_per_samp
: 1;
275 * Vertex shader variant parameters:
277 unsigned vclamp_color
: 1;
280 * Fragment shader variant parameters:
282 unsigned sample_shading
: 1;
284 unsigned color_two_side
: 1;
285 /* used when shader needs to handle flat varyings (a4xx)
286 * for front/back color inputs to frag shader:
288 unsigned rasterflat
: 1;
289 unsigned fclamp_color
: 1;
291 /* Indicates that this is a tessellation pipeline which requires a
292 * whole different kind of vertex shader. In case of
293 * tessellation, this field also tells us which kind of output
294 * topology the TES uses, which the TCS needs to know.
296 #define IR3_TESS_NONE 0
297 #define IR3_TESS_TRIANGLES 1
298 #define IR3_TESS_QUADS 2
299 #define IR3_TESS_ISOLINES 3
300 unsigned tessellation
: 2;
304 /* Whether this variant sticks to the "safe" maximum constlen,
305 * which guarantees that the combined stages will never go over
308 unsigned safe_constlen
: 1;
313 /* bitmask of sampler which needs coords clamped for vertex
316 uint16_t vsaturate_s
, vsaturate_t
, vsaturate_r
;
318 /* bitmask of sampler which needs coords clamped for frag
321 uint16_t fsaturate_s
, fsaturate_t
, fsaturate_r
;
323 /* bitmask of ms shifts */
324 uint32_t vsamples
, fsamples
;
326 /* bitmask of samplers which need astc srgb workaround: */
327 uint16_t vastc_srgb
, fastc_srgb
;
330 static inline unsigned
331 ir3_tess_mode(unsigned gl_tess_mode
)
333 switch (gl_tess_mode
) {
335 return IR3_TESS_ISOLINES
;
337 return IR3_TESS_TRIANGLES
;
339 return IR3_TESS_QUADS
;
341 unreachable("bad tessmode");
346 ir3_shader_key_equal(const struct ir3_shader_key
*a
, const struct ir3_shader_key
*b
)
348 /* slow-path if we need to check {v,f}saturate_{s,t,r} */
349 if (a
->has_per_samp
|| b
->has_per_samp
)
350 return memcmp(a
, b
, sizeof(struct ir3_shader_key
)) == 0;
351 return a
->global
== b
->global
;
354 /* will the two keys produce different lowering for a fragment shader? */
356 ir3_shader_key_changes_fs(struct ir3_shader_key
*key
, struct ir3_shader_key
*last_key
)
358 if (last_key
->has_per_samp
|| key
->has_per_samp
) {
359 if ((last_key
->fsaturate_s
!= key
->fsaturate_s
) ||
360 (last_key
->fsaturate_t
!= key
->fsaturate_t
) ||
361 (last_key
->fsaturate_r
!= key
->fsaturate_r
) ||
362 (last_key
->fsamples
!= key
->fsamples
) ||
363 (last_key
->fastc_srgb
!= key
->fastc_srgb
))
367 if (last_key
->fclamp_color
!= key
->fclamp_color
)
370 if (last_key
->color_two_side
!= key
->color_two_side
)
373 if (last_key
->rasterflat
!= key
->rasterflat
)
376 if (last_key
->ucp_enables
!= key
->ucp_enables
)
379 if (last_key
->safe_constlen
!= key
->safe_constlen
)
385 /* will the two keys produce different lowering for a vertex shader? */
387 ir3_shader_key_changes_vs(struct ir3_shader_key
*key
, struct ir3_shader_key
*last_key
)
389 if (last_key
->has_per_samp
|| key
->has_per_samp
) {
390 if ((last_key
->vsaturate_s
!= key
->vsaturate_s
) ||
391 (last_key
->vsaturate_t
!= key
->vsaturate_t
) ||
392 (last_key
->vsaturate_r
!= key
->vsaturate_r
) ||
393 (last_key
->vsamples
!= key
->vsamples
) ||
394 (last_key
->vastc_srgb
!= key
->vastc_srgb
))
398 if (last_key
->vclamp_color
!= key
->vclamp_color
)
401 if (last_key
->ucp_enables
!= key
->ucp_enables
)
404 if (last_key
->safe_constlen
!= key
->safe_constlen
)
411 * On a4xx+a5xx, Images share state with textures and SSBOs:
413 * + Uses texture (cat5) state/instruction (isam) to read
414 * + Uses SSBO state and instructions (cat6) to write and for atomics
416 * Starting with a6xx, Images and SSBOs are basically the same thing,
417 * with texture state and isam also used for SSBO reads.
419 * On top of that, gallium makes the SSBO (shader_buffers) state semi
420 * sparse, with the first half of the state space used for atomic
421 * counters lowered to atomic buffers. We could ignore this, but I
422 * don't think we could *really* handle the case of a single shader
423 * that used the max # of textures + images + SSBOs. And once we are
424 * offsetting images by num_ssbos (or visa versa) to map them into
425 * the same hardware state, the hardware state has become coupled to
426 * the shader state, so at this point we might as well just use a
427 * mapping table to remap things from image/SSBO idx to hw idx.
429 * To make things less (more?) confusing, for the hw "SSBO" state
430 * (since it is really both SSBO and Image) I'll use the name "IBO"
432 struct ir3_ibo_mapping
{
433 #define IBO_INVALID 0xff
434 /* Maps logical SSBO state to hw tex state: */
435 uint8_t ssbo_to_tex
[IR3_MAX_SHADER_BUFFERS
];
437 /* Maps logical Image state to hw tex state: */
438 uint8_t image_to_tex
[IR3_MAX_SHADER_IMAGES
];
440 /* Maps hw state back to logical SSBO or Image state:
442 * note IBO_SSBO ORd into values to indicate that the
443 * hw slot is used for SSBO state vs Image state.
445 #define IBO_SSBO 0x80
446 uint8_t tex_to_image
[32];
448 uint8_t num_tex
; /* including real textures */
449 uint8_t tex_base
; /* the number of real textures, ie. image/ssbo start here */
452 /* Represents half register in regid */
453 #define HALF_REG_ID 0x100
456 * Shader variant which contains the actual hw shader instructions,
457 * and necessary info for shader state setup.
459 struct ir3_shader_variant
{
462 /* variant id (for debug) */
465 struct ir3_shader_key key
;
467 /* vertex shaders can have an extra version for hwbinning pass,
468 * which is pointed to by so->binning:
472 struct ir3_shader_variant
*binning
;
473 struct ir3_shader_variant
*nonbinning
;
476 struct ir3
*ir
; /* freed after assembling machine instructions */
478 /* shader variants form a linked list: */
479 struct ir3_shader_variant
*next
;
481 /* replicated here to avoid passing extra ptrs everywhere: */
482 gl_shader_stage type
;
483 struct ir3_shader
*shader
;
486 * Below here is serialized when written to disk cache:
489 /* The actual binary shader instructions, size given by info.sizedwords: */
492 struct ir3_const_state
*const_state
;
495 * The following macros are used by the shader disk cache save/
496 * restore paths to serialize/deserialize the variant. Any
497 * pointers that require special handling in store_variant()
498 * and retrieve_variant() should go above here.
500 #define VARIANT_CACHE_START offsetof(struct ir3_shader_variant, info)
501 #define VARIANT_CACHE_PTR(v) (((char *)v) + VARIANT_CACHE_START)
502 #define VARIANT_CACHE_SIZE (sizeof(struct ir3_shader_variant) - VARIANT_CACHE_START)
504 struct ir3_info info
;
506 /* Levels of nesting of flow control:
508 unsigned branchstack
;
513 /* the instructions length is in units of instruction groups
514 * (4 instructions for a3xx, 16 instructions for a4xx.. each
515 * instruction is 2 dwords):
519 /* the constants length is in units of vec4's, and is the sum of
520 * the uniforms and the built-in compiler constants
525 * + Let the frag shader determine the position/compmask for the
526 * varyings, since it is the place where we know if the varying
527 * is actually used, and if so, which components are used. So
528 * what the hw calls "outloc" is taken from the "inloc" of the
530 * + From the vert shader, we only need the output regid
533 bool frag_face
, color0_mrt
;
534 uint8_t fragcoord_compmask
;
536 /* NOTE: for input/outputs, slot is:
537 * gl_vert_attrib - for VS inputs
538 * gl_varying_slot - for VS output / FS input
539 * gl_frag_result - for FS output
542 /* varyings/outputs: */
543 unsigned outputs_count
;
548 } outputs
[32 + 2]; /* +POSITION +PSIZE */
549 bool writes_pos
, writes_smask
, writes_psize
;
551 /* Size in dwords of all outputs for VS, size of entire patch for HS. */
552 uint32_t output_size
;
554 /* Map from driver_location to byte offset in per-primitive storage */
555 unsigned output_loc
[32];
557 /* attributes (VS) / varyings (FS):
558 * Note that sysval's should come *after* normal inputs.
560 unsigned inputs_count
;
565 /* location of input (ie. offset passed to bary.f, etc). This
566 * matches the SP_VS_VPC_DST_REG.OUTLOCn value (a3xx and a4xx
567 * have the OUTLOCn value offset by 8, presumably to account
568 * for gl_Position/gl_PointSize)
571 /* vertex shader specific: */
572 bool sysval
: 1; /* slot is a gl_system_value */
573 /* fragment shader specific: */
574 bool bary
: 1; /* fetched varying (vs one loaded into reg) */
575 bool rasterflat
: 1; /* special handling for emit->rasterflat */
576 bool use_ldlv
: 1; /* internal to ir3_compiler_nir */
578 enum glsl_interp_mode interpolate
;
579 } inputs
[32 + 2]; /* +POSITION +FACE */
581 /* sum of input components (scalar). For frag shaders, it only counts
582 * the varying inputs:
586 /* For frag shaders, the total number of inputs (not scalar,
587 * ie. SP_VS_PARAM_REG.TOTALVSOUTVAR)
591 /* Remapping table to map Image and SSBO to hw state: */
592 struct ir3_ibo_mapping image_mapping
;
594 /* number of samplers/textures (which are currently 1:1): */
597 /* is there an implicit sampler to read framebuffer (FS only).. if
598 * so the sampler-idx is 'num_samp - 1' (ie. it is appended after
599 * the last "real" texture)
603 /* do we have one or more SSBO instructions: */
606 /* Which bindless resources are used, for filling out sp_xs_config */
612 /* do we need derivatives: */
615 bool need_fine_derivatives
;
617 /* do we have image write, etc (which prevents early-z): */
620 /* do we have kill, which also prevents early-z, but not necessarily
621 * early-lrz (as long as lrz-write is disabled, which must be handled
622 * outside of ir3. Unlike other no_earlyz cases, kill doesn't have
623 * side effects that prevent early-lrz discard.
629 /* Are we using split or merged register file? */
632 /* for astc srgb workaround, the number/base of additional
633 * alpha tex states we need, and index of original tex states
636 unsigned base
, count
;
637 unsigned orig_idx
[16];
640 /* texture sampler pre-dispatches */
641 uint32_t num_sampler_prefetch
;
642 struct ir3_sampler_prefetch sampler_prefetch
[IR3_MAX_SAMPLER_PREFETCH
];
645 static inline const char *
646 ir3_shader_stage(struct ir3_shader_variant
*v
)
649 case MESA_SHADER_VERTEX
: return v
->binning_pass
? "BVERT" : "VERT";
650 case MESA_SHADER_TESS_CTRL
: return "TCS";
651 case MESA_SHADER_TESS_EVAL
: return "TES";
652 case MESA_SHADER_GEOMETRY
: return "GEOM";
653 case MESA_SHADER_FRAGMENT
: return "FRAG";
654 case MESA_SHADER_COMPUTE
: return "CL";
656 unreachable("invalid type");
661 /* Currently we do not do binning for tess. And for GS there is no
662 * cross-stage VS+GS optimization, so the full VS+GS is used in
666 ir3_has_binning_vs(const struct ir3_shader_key
*key
)
668 if (key
->tessellation
|| key
->has_gs
)
674 * Represents a shader at the API level, before state-specific variants are
678 gl_shader_stage type
;
680 /* shader id (for debug): */
682 uint32_t variant_count
;
684 /* Set by freedreno after shader_state_create, so we can emit debug info
685 * when recompiling a shader at draw time.
687 bool initial_variants_done
;
689 struct ir3_compiler
*compiler
;
691 unsigned num_reserved_user_consts
;
694 struct nir_shader
*nir
;
695 struct ir3_stream_output_info stream_output
;
697 struct ir3_shader_variant
*variants
;
700 cache_key cache_key
; /* shader disk-cache key */
702 /* Bitmask of bits of the shader key used by this shader. Used to avoid
703 * recompiles for GL NOS that doesn't actually apply to the shader.
705 struct ir3_shader_key key_mask
;
709 * In order to use the same cmdstream, in particular constlen setup and const
710 * emit, for both binning and draw pass (a6xx+), the binning pass re-uses it's
711 * corresponding draw pass shaders const_state.
713 static inline struct ir3_const_state
*
714 ir3_const_state(const struct ir3_shader_variant
*v
)
717 return v
->nonbinning
->const_state
;
718 return v
->const_state
;
721 /* Given a variant, calculate the maximum constlen it can have.
724 static inline unsigned
725 ir3_max_const(const struct ir3_shader_variant
*v
)
727 const struct ir3_compiler
*compiler
= v
->shader
->compiler
;
729 if (v
->shader
->type
== MESA_SHADER_COMPUTE
) {
730 return compiler
->max_const_compute
;
731 } else if (v
->key
.safe_constlen
) {
732 return compiler
->max_const_safe
;
733 } else if (v
->shader
->type
== MESA_SHADER_FRAGMENT
) {
734 return compiler
->max_const_frag
;
736 return compiler
->max_const_geom
;
740 void * ir3_shader_assemble(struct ir3_shader_variant
*v
);
741 struct ir3_shader_variant
* ir3_shader_get_variant(struct ir3_shader
*shader
,
742 const struct ir3_shader_key
*key
, bool binning_pass
, bool *created
);
743 struct ir3_shader
* ir3_shader_from_nir(struct ir3_compiler
*compiler
, nir_shader
*nir
,
744 unsigned reserved_user_consts
, struct ir3_stream_output_info
*stream_output
);
745 uint32_t ir3_trim_constlen(struct ir3_shader_variant
**variants
,
746 const struct ir3_compiler
*compiler
);
747 void ir3_shader_destroy(struct ir3_shader
*shader
);
748 void ir3_shader_disasm(struct ir3_shader_variant
*so
, uint32_t *bin
, FILE *out
);
749 uint64_t ir3_shader_outputs(const struct ir3_shader
*so
);
752 ir3_glsl_type_size(const struct glsl_type
*type
, bool bindless
);
758 /* clears shader-key flags which don't apply to the given shader.
761 ir3_key_clear_unused(struct ir3_shader_key
*key
, struct ir3_shader
*shader
)
763 uint32_t *key_bits
= (uint32_t *)key
;
764 uint32_t *key_mask
= (uint32_t *)&shader
->key_mask
;
765 STATIC_ASSERT(sizeof(*key
) % 4 == 0);
766 for (int i
= 0; i
< sizeof(*key
) >> 2; i
++)
767 key_bits
[i
] &= key_mask
[i
];
771 ir3_find_output(const struct ir3_shader_variant
*so
, gl_varying_slot slot
)
775 for (j
= 0; j
< so
->outputs_count
; j
++)
776 if (so
->outputs
[j
].slot
== slot
)
779 /* it seems optional to have a OUT.BCOLOR[n] for each OUT.COLOR[n]
780 * in the vertex shader.. but the fragment shader doesn't know this
781 * so it will always have both IN.COLOR[n] and IN.BCOLOR[n]. So
782 * at link time if there is no matching OUT.BCOLOR[n], we must map
783 * OUT.COLOR[n] to IN.BCOLOR[n]. And visa versa if there is only
784 * a OUT.BCOLOR[n] but no matching OUT.COLOR[n]
786 if (slot
== VARYING_SLOT_BFC0
) {
787 slot
= VARYING_SLOT_COL0
;
788 } else if (slot
== VARYING_SLOT_BFC1
) {
789 slot
= VARYING_SLOT_COL1
;
790 } else if (slot
== VARYING_SLOT_COL0
) {
791 slot
= VARYING_SLOT_BFC0
;
792 } else if (slot
== VARYING_SLOT_COL1
) {
793 slot
= VARYING_SLOT_BFC1
;
798 for (j
= 0; j
< so
->outputs_count
; j
++)
799 if (so
->outputs
[j
].slot
== slot
)
808 ir3_next_varying(const struct ir3_shader_variant
*so
, int i
)
810 while (++i
< so
->inputs_count
)
811 if (so
->inputs
[i
].compmask
&& so
->inputs
[i
].bary
)
816 struct ir3_shader_linkage
{
817 /* Maximum location either consumed by the fragment shader or produced by
818 * the last geometry stage, i.e. the size required for each vertex in the
823 /* Number of entries in var. */
826 /* Bitset of locations used, including ones which are only used by the FS.
830 /* Map from VS output to location. */
837 /* location for fixed-function gl_PrimitiveID passthrough */
842 ir3_link_add(struct ir3_shader_linkage
*l
, uint8_t regid_
, uint8_t compmask
, uint8_t loc
)
844 for (int j
= 0; j
< util_last_bit(compmask
); j
++) {
845 uint8_t comploc
= loc
+ j
;
846 l
->varmask
[comploc
/ 32] |= 1 << (comploc
% 32);
849 l
->max_loc
= MAX2(l
->max_loc
, loc
+ util_last_bit(compmask
));
851 if (regid_
!= regid(63, 0)) {
853 debug_assert(i
< ARRAY_SIZE(l
->var
));
855 l
->var
[i
].regid
= regid_
;
856 l
->var
[i
].compmask
= compmask
;
862 ir3_link_shaders(struct ir3_shader_linkage
*l
,
863 const struct ir3_shader_variant
*vs
,
864 const struct ir3_shader_variant
*fs
,
867 /* On older platforms, varmask isn't programmed at all, and it appears
868 * that the hardware generates a mask of used VPC locations using the VS
869 * output map, and hangs if a FS bary instruction references a location
870 * not in the list. This means that we need to have a dummy entry in the
871 * VS out map for things like gl_PointCoord which aren't written by the
872 * VS. Furthermore we can't use r63.x, so just pick a random register to
873 * use if there is no VS output.
875 const unsigned default_regid
= pack_vs_out
? regid(63, 0) : regid(0, 0);
878 l
->primid_loc
= 0xff;
880 while (l
->cnt
< ARRAY_SIZE(l
->var
)) {
881 j
= ir3_next_varying(fs
, j
);
883 if (j
>= fs
->inputs_count
)
886 if (fs
->inputs
[j
].inloc
>= fs
->total_in
)
889 k
= ir3_find_output(vs
, fs
->inputs
[j
].slot
);
891 if (k
< 0 && fs
->inputs
[j
].slot
== VARYING_SLOT_PRIMITIVE_ID
) {
892 l
->primid_loc
= fs
->inputs
[j
].inloc
;
895 ir3_link_add(l
, k
>= 0 ? vs
->outputs
[k
].regid
: default_regid
,
896 fs
->inputs
[j
].compmask
, fs
->inputs
[j
].inloc
);
900 static inline uint32_t
901 ir3_find_output_regid(const struct ir3_shader_variant
*so
, unsigned slot
)
904 for (j
= 0; j
< so
->outputs_count
; j
++)
905 if (so
->outputs
[j
].slot
== slot
) {
906 uint32_t regid
= so
->outputs
[j
].regid
;
907 if (so
->outputs
[j
].half
)
908 regid
|= HALF_REG_ID
;
914 #define VARYING_SLOT_GS_HEADER_IR3 (VARYING_SLOT_MAX + 0)
915 #define VARYING_SLOT_GS_VERTEX_FLAGS_IR3 (VARYING_SLOT_MAX + 1)
916 #define VARYING_SLOT_TCS_HEADER_IR3 (VARYING_SLOT_MAX + 2)
919 static inline uint32_t
920 ir3_find_sysval_regid(const struct ir3_shader_variant
*so
, unsigned slot
)
923 for (j
= 0; j
< so
->inputs_count
; j
++)
924 if (so
->inputs
[j
].sysval
&& (so
->inputs
[j
].slot
== slot
))
925 return so
->inputs
[j
].regid
;
929 /* calculate register footprint in terms of half-regs (ie. one full
930 * reg counts as two half-regs).
932 static inline uint32_t
933 ir3_shader_halfregs(const struct ir3_shader_variant
*v
)
935 return (2 * (v
->info
.max_reg
+ 1)) + (v
->info
.max_half_reg
+ 1);
938 static inline uint32_t
939 ir3_shader_nibo(const struct ir3_shader_variant
*v
)
941 /* The dummy variant used in binning mode won't have an actual shader. */
945 return v
->shader
->nir
->info
.num_ssbos
+ v
->shader
->nir
->info
.num_images
;
948 #endif /* IR3_SHADER_H_ */