1#!amber
2
3# Copyright 2020 Google LLC
4#
5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at
8#
9#     http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
16
17
18# A test for a coverage-gap found by the GraphicsFuzz project.
19
20# Short description: A fragment shader that covers a specific APFloat path
21
22# The test passes because the shader always writes red.
23
24SHADER vertex variant_vertex_shader PASSTHROUGH
25
26# variant_fragment_shader is derived from the following GLSL:
27# #version 310 es
28# #define _float_1_0 _GLF_uniform_float_values[0]
29# #define _float_0_0 _GLF_uniform_float_values[1]
30# #define _float_0_01 _GLF_uniform_float_values[2]
31#
32# precision highp float;
33# precision highp int;
34#
35# // Contents of _GLF_uniform_float_values: 1.0
36# layout(set = 0, binding = 0) uniform buf0
37# {
38#     float _GLF_uniform_float_values[3];
39# };
40# layout(location = 0) out vec4 _GLF_color;
41#
42# void main()
43# {
44#     float a = mod(uintBitsToFloat(1u), 1.0);
45#
46#     _GLF_color = vec4(_float_0_0);
47#     if (a < _float_0_01)
48#         _GLF_color = vec4(_float_1_0, _float_0_0, _float_0_0, _float_1_0);
49# }
50SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
51; SPIR-V
52; Version: 1.0
53; Generator: Khronos Glslang Reference Front End; 10
54; Bound: 46
55; Schema: 0
56               OpCapability Shader
57          %1 = OpExtInstImport "GLSL.std.450"
58               OpMemoryModel Logical GLSL450
59               OpEntryPoint Fragment %4 "main" %16
60               OpExecutionMode %4 OriginUpperLeft
61               OpSource ESSL 310
62               OpName %4 "main"
63               OpName %8 "a"
64               OpName %16 "_GLF_color"
65               OpName %19 "buf0"
66               OpMemberName %19 0 "_GLF_uniform_float_values"
67               OpName %21 ""
68               OpDecorate %16 Location 0
69               OpDecorate %18 ArrayStride 16
70               OpMemberDecorate %19 0 Offset 0
71               OpDecorate %19 Block
72               OpDecorate %21 DescriptorSet 0
73               OpDecorate %21 Binding 0
74          %2 = OpTypeVoid
75          %3 = OpTypeFunction %2
76          %6 = OpTypeFloat 32
77          %7 = OpTypePointer Function %6
78          %9 = OpTypeInt 32 0
79         %10 = OpConstant %9 1
80         %12 = OpConstant %6 1
81         %14 = OpTypeVector %6 4
82         %15 = OpTypePointer Output %14
83         %16 = OpVariable %15 Output
84         %17 = OpConstant %9 3
85         %18 = OpTypeArray %6 %17
86         %19 = OpTypeStruct %18
87         %20 = OpTypePointer Uniform %19
88         %21 = OpVariable %20 Uniform
89         %22 = OpTypeInt 32 1
90         %23 = OpConstant %22 0
91         %24 = OpConstant %22 1
92         %25 = OpTypePointer Uniform %6
93         %30 = OpConstant %22 2
94         %33 = OpTypeBool
95          %4 = OpFunction %2 None %3
96          %5 = OpLabel
97          %8 = OpVariable %7 Function
98         %11 = OpBitcast %6 %10
99         %13 = OpFMod %6 %11 %12
100               OpStore %8 %13
101         %26 = OpAccessChain %25 %21 %23 %24
102         %27 = OpLoad %6 %26
103         %28 = OpCompositeConstruct %14 %27 %27 %27 %27
104               OpStore %16 %28
105         %29 = OpLoad %6 %8
106         %31 = OpAccessChain %25 %21 %23 %30
107         %32 = OpLoad %6 %31
108         %34 = OpFOrdLessThan %33 %29 %32
109               OpSelectionMerge %36 None
110               OpBranchConditional %34 %35 %36
111         %35 = OpLabel
112         %37 = OpAccessChain %25 %21 %23 %23
113         %38 = OpLoad %6 %37
114         %39 = OpAccessChain %25 %21 %23 %24
115         %40 = OpLoad %6 %39
116         %41 = OpAccessChain %25 %21 %23 %24
117         %42 = OpLoad %6 %41
118         %43 = OpAccessChain %25 %21 %23 %23
119         %44 = OpLoad %6 %43
120         %45 = OpCompositeConstruct %14 %38 %40 %42 %44
121               OpStore %16 %45
122               OpBranch %36
123         %36 = OpLabel
124               OpReturn
125               OpFunctionEnd
126END
127
128# uniforms for variant
129
130# _GLF_uniform_float_values
131BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
132 1.0 0.0 0.01
133END
134
135BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
136
137PIPELINE graphics variant_pipeline
138  ATTACH variant_vertex_shader
139  ATTACH variant_fragment_shader
140  FRAMEBUFFER_SIZE 256 256
141  BIND BUFFER variant_framebuffer AS color LOCATION 0
142  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0
143END
144CLEAR_COLOR variant_pipeline 0 0 0 255
145
146CLEAR variant_pipeline
147RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
148
149EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
150