Commit Graph

326 Commits

Author SHA1 Message Date
Chip Davis
1df47db6ba Support the SPV_KHR_post_depth_coverage extension.
Using the `PostDepthCoverage` mode specifies that the `gl_SampleMaskIn`
variable is to contain the computed coverage mask following the early
fragment tests, which this mode requires and implicitly enables.

Note that unlike Vulkan and OpenGL, Metal places this on the sample mask
input itself, and furthermore does *not* implicitly enable early
fragment testing. If it isn't enabled explicitly with an
`[[early_fragment_tests]]` attribute, the compiler will error out. So we
have to enable that mode explicitly if `PostDepthCoverage` is enabled
but `EarlyFragmentTests` isn't.

For Metal, only iOS supports this; for some reason, Apple has yet to
implement it on macOS, even though many desktop cards support it.
2019-07-11 10:28:43 -05:00
Hans-Kristian Arntzen
1a592b7c0f
Merge pull request #1067 from cdavis5e/msl-scalar-block-layout
MSL: Support scalar block layout.
2019-07-11 13:03:03 +02:00
Chip Davis
28454facbb MSL: Handle packed matrices.
The old method of using a different unpacked matrix type doesn't work
for scalar alignment. It certainly wouldn't have any effect for a square
matrix, since the number of columns and rows are the same. So now we'll
store them as arrays of packed vectors.
2019-07-10 18:37:31 -05:00
Hans-Kristian Arntzen
f6f849397e MSL: Re-roll array expressions in initializers.
We cannot rely on copy path when using an array as part of a struct
initializer, so reroll such expressions to an initializer list again.
2019-07-10 11:19:33 +02:00
Chip Davis
e5fa7edfd6 MSL: Support scalar block layout.
Relaxed block layout relaxed the restrictions on vector alignment,
allowing them to be aligned on scalar boundaries. Scalar block layout
relaxes this further, allowing *any* member to be aligned on a scalar
boundary. The requirement that a vector not improperly straddle a
16-byte boundary is also relaxed.

I've also added a test showing that `std430` layout works with UBOs.

I'm troubled by the dual meaning of the `Packed` extended decoration. In
some instances (struct, `float[]`, and `vec2[]` members), it actually
means the exact opposite, that the member needs extra padding. This is
especially problematic for `vec2[]`, because now we need to distinguish
the two cases by checking the array stride. I wonder if this should
actually be split into two decorations.
2019-07-09 20:59:32 -05:00
Hans-Kristian Arntzen
50342966c0 Fall back to complex loop if non-trivial continue block is found.
There is a case where we can deduce a for/while loop, but the continue
block is actually very painful to deal with, so handle that case as
well. Removes an exceptional case.
2019-07-08 11:54:29 +02:00
Hans-Kristian Arntzen
4056d0b74e Don't use scalar dot(). 2019-07-03 14:32:06 +02:00
Hans-Kristian Arntzen
041f103d44 MSL/HLSL: Support scalar reflect and refract. 2019-07-03 12:31:52 +02:00
Chip Davis
31b6c93516 MSL: Support SubgroupLocalInvocationId and SubgroupSize in all stages.
MSL prior to 2.2 doesn't support these natively in any stage but
compute. But, we can (assuming no threads were terminated prematurely)
get their values with some creative uses of the
`simd_prefix_exclusive_sum()` and `simd_sum()` functions.

Also, fix a missing `to_expression()` with `BuiltInSubgroupEqMask`.

For KhronosGroup/MoltenVK#629.
2019-07-02 11:48:59 -05:00
Hans-Kristian Arntzen
f8b084de61 MSL/HLSL: Support OpOuterProduct. 2019-07-01 10:57:27 +02:00
Chip Davis
7eecf5a46b MSL: Support SPV_KHR_multiview.
This is needed to support `VK_KHR_multiview`, which is in turn needed
for Vulkan 1.1 support. Unfortunately, Metal provides no native support
for this, and Apple is once again less than forthcoming, so we have to
implement it all ourselves.

Tessellation and geometry shaders are deliberately unsupported for now.
The problem is that the current implementation encodes the `ViewIndex`
as part of the `InstanceIndex`, which in the SPIR-V environment at least
only exists in the vertex shader. So we need to work out a way to pass
the view index along to the later stages.

This implementation runs vertex shaders for all views up to the highest
bit set in the view mask, even those whose bits are clear. The fragments
for the inactive views are then discarded. Avoiding this is difficult:
calculating the view indices becomes far more complicated if we can only
run for those views which are set in the mask.
2019-06-29 09:43:55 -05:00
Hans-Kristian Arntzen
ff87419607 Deal with scalar input values for distance/length/normalize.
HLSL and MSL don't support it, so fall back to simpler intrinsics.
2019-06-28 11:20:14 +02:00
Hans-Kristian Arntzen
c76b99b711 Handle more cases with FP16 and texture sampling. 2019-06-27 15:04:22 +02:00
Hans-Kristian Arntzen
ab3798fd91 MSL: Add support for SubgroupSize / SubgroupInvocationID in fragment. 2019-06-24 12:31:54 +02:00
Hans-Kristian Arntzen
e2c95bdcbc MSL: Rewrite how resource indices are fallback-assigned.
We used to use the Binding decoration for this, but this method is
hopelessly broken. If no explicit MSL resource remapping exists, we
remap automatically in a manner which should always "just work".
2019-06-21 12:54:08 +02:00
Hans-Kristian Arntzen
a1f7c8dc8e
Merge pull request #1031 from KhronosGroup/fix-1009
MSL: Support 64-bit integers.
2019-06-19 15:29:27 +02:00
Hans-Kristian Arntzen
7fdb418f18
Merge pull request #1028 from KhronosGroup/fix-1010
MSL: Support barycentrics and PrimitiveID in fragment shaders
2019-06-19 15:29:14 +02:00
Hans-Kristian Arntzen
4c20c941f0
Merge pull request #1025 from KhronosGroup/fix-1013
MSL: Support OpImageQueryLod.
2019-06-19 14:07:39 +02:00
Hans-Kristian Arntzen
a6798d06a2 MSL: Error out on int64_t/uint64_t buffer members.
Not supported for whatever reason.
2019-06-19 10:14:46 +02:00
Hans-Kristian Arntzen
a6b71ae999 MSL: Support 64-bit integers. 2019-06-19 09:55:00 +02:00
Hans-Kristian Arntzen
2e1cee5e1e MSL: Support PrimitiveID in fragment and barycentrics. 2019-06-19 09:52:35 +02:00
Hans-Kristian Arntzen
0671b3c35b MSL: Support OpImageQueryLod.
Correctness is a bit unclear at the moment. The spec document for 2.2 is
not updated for query-lod, but this is the best we can do anyways.
2019-06-19 09:51:56 +02:00
Hans-Kristian Arntzen
f171d82590 MSL: Support MinLod operand. 2019-06-19 09:43:03 +02:00
Hans-Kristian Arntzen
026a167549 MSL: New SDK errors out on cull distance.
Not supported, so just ignore this test for now, it should not have
compiled in the first place.
2019-06-14 12:12:40 +02:00
Hans-Kristian Arntzen
d81bfc5b58 MSL: Fix regression with Private parameter declaration.
If we compile multiple times due to forced_recompile, we had
deferred_declaration = true while emitting function prototypes which
broke an assumption. Fix this by clearing out stale state before leaving
a function.
2019-06-13 10:36:21 +02:00
Hans-Kristian Arntzen
95053ea4bc
Merge pull request #1024 from KhronosGroup/fix-1016
GLSL/MSL: Support stencil export
2019-06-12 12:48:10 +02:00
Hans-Kristian Arntzen
14d0a1eb0c MSL: Support stencil export. 2019-06-12 10:21:20 +02:00
Hans-Kristian Arntzen
a7b2ba28a0 MSL: Support Invariant qualifier on position. 2019-06-12 09:39:12 +02:00
Hans-Kristian Arntzen
03d93abc1a Deal with case where a variable is dominated by inner part of a loop.
There is a risk that we try to preserve a loop variable through multiple
iterations, even though the dominating block is inside a loop.

Fix this by analyzing if a block starts off by writing to a variable. In
that case, there cannot be any preservation going on. If we don't, pretend the
loop header is reading the variable, which moves the variable to an
appropriate scope.
2019-06-06 11:11:44 +02:00
Hans-Kristian Arntzen
314efdcc42 MSL: Fix declaration of unused input variables.
In multiple-entry-point modules, we declared builtin inputs which were
not supposed to be used for that entry point.

Fix this, by being more strict when checking which builtins to emit.
2019-05-31 13:23:34 +02:00
Hans-Kristian Arntzen
65af09d2d1 Support emitting OpLine directive.
Facilitates easier mapping from source language to cross-compiled output
in tooling.
2019-05-28 13:44:24 +02:00
Hans-Kristian Arntzen
fd0feb1ec1 MSL: Use correct address space when passing array-of-buffers.
Need to check if the descriptor set is actually an argument buffer.
2019-05-27 16:53:30 +02:00
Hans-Kristian Arntzen
42e64597a7 OpArrayLength must trigger active variables. 2019-05-27 16:44:02 +02:00
Hans-Kristian Arntzen
7b9e0fb428 MSL: Implement OpArrayLength.
This gets rather complicated because MSL does not support OpArrayLength
natively. We need to pass down a buffer which contains buffer sizes, and
we compute the array length on-demand.

Support both discrete descriptors as well as argument buffers.
2019-05-27 16:13:09 +02:00
Hans-Kristian Arntzen
55ff233526 MSL: Add test case for complex type alias. 2019-05-23 15:05:30 +02:00
Hans-Kristian Arntzen
96492648d4 MSL: Fix struct declaration order with complex type aliases.
MSL generally emits the aliases, which means we cannot always place the
master type first, unlike GLSL and HLSL. The logic fix is just to
reorder after we have tagged types with packing information, rather than
doing it in the parser fixup.
2019-05-23 14:54:04 +02:00
Hans-Kristian Arntzen
eaf7afed97 MSL: Support argument buffers and image swizzling.
Change aux buffer to swizzle buffer.
There is no good reason to expand the aux buffer, so name it
appropriately.

Make the code cleaner by emitting a straight pointer to uint rather than
a dummy struct which only contains a single unsized array member anyways.

This will also end up being very similar to how we implement swizzle
buffers for argument buffers.

Do not use implied binding if it overflows int32_t.
2019-05-18 10:30:06 +02:00
Chip Davis
8983920edf Remove fallback for OpGroupNonUniformElect.
It's not safe to enable subgroup support without this actually working
correctly.
2019-05-16 13:42:09 -05:00
Chip Davis
9d9415754b MSL: Add support for subgroup operations.
Some support for subgroups is present starting in Metal 2.0 on both iOS
and macOS. macOS gains more complete support in 10.14 (Metal 2.1).

Some restrictions are present. On iOS and on macOS 10.13, the
implementation of `OpGroupNonUniformElect` is incorrect: if thread 0 has
already terminated or is not executing a conditional branch, the first
thread that *is* will falsely believe itself not to be. Unfortunately,
this operation is part of the "basic" feature set; without it, subgroups
cannot be supported at all.

The `SubgroupSize` and `SubgroupLocalInvocationId` builtins are only
available in compute shaders (and, by extension, tessellation control
shaders), despite SPIR-V making them available in all stages. This
limits the usefulness of some of the subgroup operations in fragment
shaders.

Although Metal on macOS supports some clustered, inclusive, and
exclusive operations, it does not support them all. In particular,
inclusive and exclusive min, max, and, or, and xor; as well as cluster
sizes other than 4 are not supported. If this becomes a problem, they
could be emulated, but at a significant performance cost due to the need
for non-uniform operations.
2019-05-15 17:40:04 -05:00
Hans-Kristian Arntzen
03da32a124 Fix nonuniform test for MSL.
Binding index overlaps.
2019-05-13 15:14:18 +02:00
Hans-Kristian Arntzen
647ddaee42 HLSL/MSL: Deal correctly with nonuniformEXT qualifier.
MSL does not seem to have a qualifier for this, but HLSL SM 5.1 does.
glslangValidator for HLSL does not support this, so skip any validation,
but it passes in FXC.
2019-05-13 14:58:27 +02:00
Hans-Kristian Arntzen
ac5eea3326 MSL: Add test for passing single swizzled texture arg from array. 2019-05-09 14:19:40 +02:00
Hans-Kristian Arntzen
97d39dc9d5 MSL: Deal with texture swizzle on arrays of images. 2019-05-09 11:25:45 +02:00
Chip Davis
01c491648b Fix a copy-pasto. 2019-04-26 17:16:21 -05:00
Hans-Kristian Arntzen
c2715c3908 MSL: Cast texture_buffer index to uint. 2019-04-23 12:46:48 +02:00
Hans-Kristian Arntzen
fc4f39b11f MSL: Support native texture_buffer type, throw error on atomics.
Atomics are not supported on images or texture_buffers in MSL.
Properly throw an error if OpImageTexelPointer is used (since it can
only be used for atomic operations anyways).
2019-04-23 12:21:43 +02:00
Michael Barriault
105bfd368a Only use MSL constant address space for tessellation control shader. 2019-04-16 17:56:02 +01:00
Michael Barriault
d6754c5713 Fix tests for device->constant address space change in MSL tessellation control shader generation. 2019-04-10 18:37:04 +01:00
Bill Hollings
efbe7ca16f MSL: Fix infinite CAS loop on atomic_compare_exchange_weak_explicit(). 2019-04-05 21:28:57 -04:00
Hans-Kristian Arntzen
0909975655 MSL: Declare gl_WorkGroupSize constant with [[maybe_unused]].
Avoids ugly warnings on nearly every compute shader.
We could do analysis to detect whether we need to emit this constant,
but it's a bit tedious to figure out if an OpConstantComponent is
actually used by opcodes, so just make it simple.
2019-03-28 10:54:18 +01:00