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nir: Add a vulkan_resource_reindex intrinsic

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This is required for being able to handle OpPtrAccessChain in SPIR-V
where the base type of the incoming pointer requires us to add to the
block index instead of the byte offset.

Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
This commit is contained in:
Jason Ekstrand 2017-11-30 15:56:39 -08:00
parent ae54a4f84f
commit cfb81f58a0
1 changed files with 8 additions and 1 deletions
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9
src/compiler/nir/nir_intrinsics.h
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@ -210,7 +210,7 @@ INTRINSIC(image_samples, 0, ARR(0), true, 1, 1, 0, xx, xx, xx,
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
/*
* Vulkan descriptor set intrinsic
* Vulkan descriptor set intrinsics
*
* The Vulkan API uses a different binding model from GL. In the Vulkan
* API, all external resources are represented by a tuple:
@ -224,10 +224,17 @@ INTRINSIC(image_samples, 0, ARR(0), true, 1, 1, 0, xx, xx, xx,
*
* The intended usage is that the shader will call vulkan_surface_index to
* get an index and then pass that as the buffer index ubo/ssbo calls.
*
* The vulkan_resource_reindex intrinsic takes a resource index in src0
* (the result of a vulkan_resource_index or vulkan_resource_reindex) which
* corresponds to the tuple (set, binding, index) and computes an index
* corresponding to tuple (set, binding, idx + src1).
*/
INTRINSIC(vulkan_resource_index, 1, ARR(1), true, 1, 0, 2,
DESC_SET, BINDING, xx,
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
INTRINSIC(vulkan_resource_reindex, 2, ARR(1, 1), true, 1, 0, 0, xx, xx, xx,
NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
/*
* variable atomic intrinsics