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array sizes must be bounded so they are indexible by 32-bit signed int #47

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dneto0 opened this issue Nov 27, 2019 · 0 comments
Open

array sizes must be bounded so they are indexible by 32-bit signed int #47

dneto0 opened this issue Nov 27, 2019 · 0 comments

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@dneto0
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dneto0 commented Nov 27, 2019

SPIR-V access chain indices are treated as signed.
So an array size must be bounded so that you can actually index the entire array.
Since the max int width is 32-bits, the max num elements should be 2^31.
dneto0 added a commit to dneto0/SPIRV-Tools that referenced this issue Nov 29, 2019
@dneto0
For WebGPU, Array size at most max signed int + 1
47b9b84 
This makes it easier to clamp indices for robust-buffer-access
behaviour.

See gpuweb/spirv-execution-env#47
dneto0 added a commit to dneto0/SPIRV-Tools that referenced this issue Nov 29, 2019
@dneto0
For WebGPU, Array size at most max signed int + 1
c7972c2 
This makes it easier to clamp indices for robust-buffer-access
behaviour.

See gpuweb/spirv-execution-env#47
dneto0 added a commit to KhronosGroup/SPIRV-Tools that referenced this issue Dec 3, 2019
@dneto0
WebGPU: Array size at most max signed int + 1 (#3077)
e82a428 
This makes it easier to clamp indices for robust-buffer-access
behaviour.

See gpuweb/spirv-execution-env#47
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