1 /*
2 * Copyright 2014, 2015 Red Hat.
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 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24 /* the virgl hw tgsi vs what the current gallium want will diverge over time.
25 so add a transform stage to remove things we don't want to send unless
26 the receiver supports it.
27 */
28
29 #include "tgsi/tgsi_transform.h"
30 #include "tgsi/tgsi_info.h"
31 #include "virgl_context.h"
32 #include "virgl_screen.h"
33
34 struct virgl_transform_context {
35 struct tgsi_transform_context base;
36 bool cull_enabled;
37 bool has_precise;
38 bool fake_fp64;
39 };
40
41 static void
virgl_tgsi_transform_declaration(struct tgsi_transform_context * ctx,struct tgsi_full_declaration * decl)42 virgl_tgsi_transform_declaration(struct tgsi_transform_context *ctx,
43 struct tgsi_full_declaration *decl)
44 {
45 switch (decl->Declaration.File) {
46 case TGSI_FILE_CONSTANT:
47 if (decl->Declaration.Dimension) {
48 if (decl->Dim.Index2D == 0)
49 decl->Declaration.Dimension = 0;
50 }
51 break;
52 default:
53 break;
54 }
55 ctx->emit_declaration(ctx, decl);
56
57 }
58
59 /* for now just strip out the new properties the remote doesn't understand
60 yet */
61 static void
virgl_tgsi_transform_property(struct tgsi_transform_context * ctx,struct tgsi_full_property * prop)62 virgl_tgsi_transform_property(struct tgsi_transform_context *ctx,
63 struct tgsi_full_property *prop)
64 {
65 struct virgl_transform_context *vtctx = (struct virgl_transform_context *)ctx;
66 switch (prop->Property.PropertyName) {
67 case TGSI_PROPERTY_NUM_CLIPDIST_ENABLED:
68 case TGSI_PROPERTY_NUM_CULLDIST_ENABLED:
69 if (vtctx->cull_enabled)
70 ctx->emit_property(ctx, prop);
71 break;
72 case TGSI_PROPERTY_NEXT_SHADER:
73 break;
74 default:
75 ctx->emit_property(ctx, prop);
76 break;
77 }
78 }
79
80 static void
virgl_tgsi_transform_instruction(struct tgsi_transform_context * ctx,struct tgsi_full_instruction * inst)81 virgl_tgsi_transform_instruction(struct tgsi_transform_context *ctx,
82 struct tgsi_full_instruction *inst)
83 {
84 struct virgl_transform_context *vtctx = (struct virgl_transform_context *)ctx;
85 if (vtctx->fake_fp64 &&
86 (tgsi_opcode_infer_src_type(inst->Instruction.Opcode, 0) == TGSI_TYPE_DOUBLE ||
87 tgsi_opcode_infer_dst_type(inst->Instruction.Opcode, 0) == TGSI_TYPE_DOUBLE)) {
88 debug_printf("VIRGL: ARB_gpu_shader_fp64 is exposed but not supported.");
89 return;
90 }
91
92 if (!vtctx->has_precise && inst->Instruction.Precise)
93 inst->Instruction.Precise = 0;
94
95 for (unsigned i = 0; i < inst->Instruction.NumSrcRegs; i++) {
96 if (inst->Src[i].Register.File == TGSI_FILE_CONSTANT &&
97 inst->Src[i].Register.Dimension &&
98 inst->Src[i].Dimension.Index == 0)
99 inst->Src[i].Register.Dimension = 0;
100 }
101 ctx->emit_instruction(ctx, inst);
102 }
103
virgl_tgsi_transform(struct virgl_context * vctx,const struct tgsi_token * tokens_in)104 struct tgsi_token *virgl_tgsi_transform(struct virgl_context *vctx, const struct tgsi_token *tokens_in)
105 {
106 struct virgl_screen *vscreen = (struct virgl_screen *)vctx->base.screen;
107 struct virgl_transform_context transform;
108 const uint newLen = tgsi_num_tokens(tokens_in);
109 struct tgsi_token *new_tokens;
110
111 new_tokens = tgsi_alloc_tokens(newLen);
112 if (!new_tokens)
113 return NULL;
114
115 memset(&transform, 0, sizeof(transform));
116 transform.base.transform_declaration = virgl_tgsi_transform_declaration;
117 transform.base.transform_property = virgl_tgsi_transform_property;
118 transform.base.transform_instruction = virgl_tgsi_transform_instruction;
119 transform.cull_enabled = vscreen->caps.caps.v1.bset.has_cull;
120 transform.has_precise = vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TGSI_PRECISE;
121 transform.fake_fp64 =
122 vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_FAKE_FP64;
123 tgsi_transform_shader(tokens_in, new_tokens, newLen, &transform.base);
124
125 return new_tokens;
126 }
127