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tests: Test wave reconvergence after selections and loops.

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Tangled instructions, like wave operations, are sensitive to how the
invocations in a wave reconverge after having diverged. Here we test
for some of those scenarios.
This commit is contained in:
Giovanni Mascellani 2024-04-30 13:54:39 +02:00 committed by Alexandre Julliard
parent a52a91d756
commit 5e6bcc4f9d
Notes: Alexandre Julliard 2024-04-30 23:15:31 +02:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/841
2 changed files with 151 additions and 0 deletions
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1
Makefile.am
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@ -237,6 +237,7 @@ vkd3d_shader_tests = \
tests/hlsl/vertex-shader-ops.shader_test \
tests/hlsl/wave-ops-float.shader_test \
tests/hlsl/wave-ops-uint.shader_test \
tests/hlsl/wave-reconvergence.shader_test \
tests/hlsl/writemask-assignop-0.shader_test \
tests/hlsl/writemask-assignop-1.shader_test \
tests/hlsl/writemask-assignop-2.shader_test \

150
tests/hlsl/wave-reconvergence.shader_test Normal file
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@ -0,0 +1,150 @@
[require]
shader model >= 6.0
[uav 0]
format r32 uint
size (buffer, 4)
0x0 0x1 0x2 0x13
[uav 1]
format r32 uint
size (buffer, 4)
0x100 0x200 0x400 0x800
[uav 2]
format r32 uint
size (buffer, 20)
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
[compute shader]
RWBuffer<uint> u0 : register(u0);
RWBuffer<uint> u1 : register(u1);
RWBuffer<uint> u2 : register(u2);
[numthreads(4, 1, 1)]
void main(uint id : SV_GroupIndex)
{
const unsigned int POS_COUNT = 5;
unsigned int i, pos = 0;
/* If SPV_KHR_subgroup_uniform_control_flow is not supported,
* SPIR-V doesn't guarantee reconvergence after the loop. */
for (i = 0; i < 2; ++i)
{
u2[POS_COUNT * id + pos++] = WaveActiveSum(u1[id]) + 16 * i + 1;
if (u0[id] & (1 << i))
{
/* In many programming languages this statement could be
* moved after the loop. Not here, because the set of
* active invocations is supposed to depend on whether
* we're still in the loop (i.e., before reconverging the
* invocations that diverged during the loop) or not. */
u2[POS_COUNT * id + pos++] = WaveActiveSum(u1[id]) + 16 * i + 2;
break;
}
else
{
u2[POS_COUNT * id + pos++] = WaveActiveSum(u1[id]) + 16 * i + 3;
}
}
u2[POS_COUNT * id + pos++] = WaveActiveSum(u1[id]) + 16 * i + 4;
}
[test]
todo dispatch 4 1 1
probe uav 2 (0) rui (0xf01)
probe uav 2 (1) rui (0x503)
probe uav 2 (2) rui (0x511)
probe uav 2 (3) rui (0x113)
probe uav 2 (4) rui (0xf24)
probe uav 2 (5) rui (0xf01)
probe uav 2 (6) rui (0xa02)
probe uav 2 (7) rui (0xf04)
probe uav 2 (8) rui (0)
probe uav 2 (9) rui (0)
probe uav 2 (10) rui (0xf01)
probe uav 2 (11) rui (0x503)
probe uav 2 (12) rui (0x511)
probe uav 2 (13) rui (0x412)
probe uav 2 (14) rui (0xf14)
probe uav 2 (15) rui (0xf01)
probe uav 2 (16) rui (0xa02)
probe uav 2 (17) rui (0xf04)
probe uav 2 (18) rui (0)
probe uav 2 (19) rui (0)
[uav 2]
format r32 uint
size (buffer, 20)
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
[compute shader]
RWBuffer<uint> u0 : register(u0);
RWBuffer<uint> u1 : register(u1);
RWBuffer<uint> u2 : register(u2);
[numthreads(4, 1, 1)]
void main(uint id : SV_GroupIndex)
{
const unsigned int POS_COUNT = 5;
unsigned int i, pos = 0;
/* If SPV_KHR_maximal_reconvergence is not supported, SPIR-V
* doesn't guarantee reconvergence after the loop even if
* SPV_KHR_subgroup_uniform_control_flow is supported, because the
* flow wasn't fully convergent when entering the loop. */
if (!(u0[id] & 0x10))
{
for (i = 0; i < 2; ++i)
{
u2[POS_COUNT * id + pos++] = WaveActiveSum(u1[id]) + 16 * i + 1;
if (u0[id] & (1 << i))
{
u2[POS_COUNT * id + pos++] = WaveActiveSum(u1[id]) + 16 * i + 2;
break;
}
else
{
u2[POS_COUNT * id + pos++] = WaveActiveSum(u1[id]) + 16 * i + 3;
}
}
u2[POS_COUNT * id + pos++] = WaveActiveSum(u1[id]) + 16 * i + 4;
}
}
[test]
todo dispatch 4 1 1
probe uav 2 (0) rui (0x701)
probe uav 2 (1) rui (0x503)
probe uav 2 (2) rui (0x511)
probe uav 2 (3) rui (0x113)
probe uav 2 (4) rui (0x724)
probe uav 2 (5) rui (0x701)
probe uav 2 (6) rui (0x202)
probe uav 2 (7) rui (0x704)
probe uav 2 (8) rui (0)
probe uav 2 (9) rui (0)
probe uav 2 (10) rui (0x701)
probe uav 2 (11) rui (0x503)
probe uav 2 (12) rui (0x511)
probe uav 2 (13) rui (0x412)
probe uav 2 (14) rui (0x714)
probe uav 2 (15) rui (0)
probe uav 2 (16) rui (0)
probe uav 2 (17) rui (0)
probe uav 2 (18) rui (0)
probe uav 2 (19) rui (0)