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nir: Add another index to load_uniform to specify the range read

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Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Jason Ekstrand
2015-11-24 13:52:49 -08:00
parent 27bd8ac6f3
commit 63101177f3
4 changed files with 18 additions and 1 deletions
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6
src/compiler/nir/nir_intrinsics.h
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@@ -293,6 +293,10 @@ SYSTEM_VALUE(helper_invocation, 1, 0, xx, xx, xx)
* of the start of the variable being loaded and and the offset source is a
* offset into that variable.
*
* Uniform load operations have a second "range" index that specifies the
* range (starting at base) of the data from which we are loading. If
* const_index[1] == 0, then the range is unknown.
*
* Some load operations such as UBO/SSBO load and per_vertex loads take an
* additional source to specify which UBO/SSBO/vertex to load from.
*
@@ -306,7 +310,7 @@ SYSTEM_VALUE(helper_invocation, 1, 0, xx, xx, xx)
INTRINSIC(load_##name, srcs, ARR(1, 1, 1, 1), true, 0, 0, num_indices, idx0, idx1, idx2, flags)
/* src[] = { offset }. const_index[] = { base } */
LOAD(uniform, 1, 1, BASE, xx, xx, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
LOAD(uniform, 1, 2, BASE, RANGE, xx, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
/* src[] = { buffer_index, offset }. No const_index */
LOAD(ubo, 2, 0, xx, xx, xx, NIR_INTRINSIC_CAN_ELIMINATE | NIR_INTRINSIC_CAN_REORDER)
/* src[] = { offset }. const_index[] = { base } */