When we are leaning on robust buffer access to do the job for us, there's no
undefined behavior going on. So `UndefinedBehavior` suggests people are doing
something reckless even if they're not. The policy just says what Naga is doing,
and it shouldn't pretend to say what the rest of the system is doing.
* Implement lexing for all WGSL number literal types
* Move number literal test cases
* Adjust tests to match WGSL spec on number literals
Suffixes are not type names and currently only a plain `u` is supported
for uints. More specifically, `i` and `f` suffixes or suffixes with
widths in bits like `u32` are not supported at the moment.
* Add more tests for invalid number literal suffixes
* Replace code too new for Rust 1.43
* Implement parsing for hexadecimal integers
* Switch to enum number types, and Bytes for width
* Check for negative and leading zeros in int literals
* Implement parsing of hex floats with hexf-parse
* Update error message tests
* Update snapshot test output files
* Clean up lexer state machine code
* Clean up unexpected token error code
* Move number literal parsing to own submodule
Using 1D images should require either the `Sampled1D` or `Image1D` capability.
Using cube array images should require either the `SampledCubeArray` or
`ImageCubeArray` capability.
Introduce a helper type that manages the details of emitting SPIR-V
conditionals, tracking labels, branches, merge annotations and phi nodes.
Change index bounds checks to use this helper.
* [hlsl-out] flatten the entry point inputs
Previously, the logic was re-ordering the inputs according to the binding.
This breaks if one of the inputs is a struct. With this change, the struct
fields are also flattened into the fake entry point struct. We also
construct the original arguments at the beginning of the function.
* hlsl-out: completely separate the flattened IO structs from the original IR structs
Previously, we had heuristics to detect if a particular struct needs the fields
to be re-ordered. We'd re-order interface structs without layout, and the detection
was very fragile and easily wrong.
The new logic is spawning separate struct types if we need any re-ordering to happen.
It's solid, there are no heuristics.
Hlsl and wgsl don't support them directly so a polyfill is used taken
from the msl spec.
`asinh` = `log(x + sqrt(x * x + 1.0))`
`acosh` = `log(x + sqrt(x * x - 1.0))`
`atanh` = `0.5 * log((1.0 + x) / (1.0 – x))`
Some SPIR-V texture access instructions take coordinates as integers, others as
floats. The types of coordinates in Naga expressions generally match those in
SPIR-V, but Naga indices for arrayed textures are always integers, whereas
SPIR-V combines coordinates and array indices into a single vector, so indices
need to be cast to match the coordinate component type.
This commit makes `write_texture_coordinates` properly cast array indices to
match the coordinates' component type before combining them all into a single
result vector.
Fixes#1186.
In `back::spv::Writer::write_texture_coordinates`, OpCompositeConstruct can
concatenate scalars and vectors, so when combining coordinates with an array
index, there is no need to extract the coordinate vector's components
individually: once the index has been converted to the appropriate component
type, it can be combined with the coordinates in a single instruction.
The new api allows for reuse while keeping some allocations and to
please the borrow checker in future work, it also splits the parser into
logical modules to make it easier to work on.
Glsl defines that if a matrix constructor is called with only a scalar
it's result will be the matrix where the scalar is used if the row and
column are equal and everywhere else a zero
Glsl allows things such as
```glsl
layout (location = 0) in vec4 a;
vec4 b = a;
```
In this case `b` depends on `a` which can't be known at compile time,
so it's necessary to add a small prologue to the entry point to
initialize it.
* Resurrect texture_storage_* tests
* Test parsing of `var<storage,write>`
* Default storage textures to READ
* Restore default features
* Fix glsl/hlsl/msl/spv front and back ends
* Add missing test outputs
* All-around fixes for the storage access
Co-authored-by: Dzmitry Malyshau <kvarkus@gmail.com>
