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agx: Use load_global_constant for UBO lowering

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Rely on the common address arithmetic optimizations. We don't need the
special formats for UBO loads anyway, so this is simpler and optimizes
out the ushr.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20558>
This commit is contained in:
Alyssa Rosenzweig 2022-12-03 17:20:54 -05:00 • committed by Marge Bot
parent 3a6a5281b3
commit ac3272be84
1 changed files with 5 additions and 9 deletions
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14
src/asahi/compiler/agx_nir_lower_ubo.c
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@ -22,15 +22,11 @@ pass(struct nir_builder *b, nir_instr *instr, UNUSED void *data)
nir_ssa_def *ubo_index = nir_ssa_for_src(b, intr->src[0], 1);
nir_ssa_def *offset = nir_ssa_for_src(b, *nir_get_io_offset_src(intr), 1);
unsigned dest_size = nir_dest_bit_size(intr->dest);
assert((dest_size == 16 || dest_size == 32) && "other sizes lowered");
nir_ssa_def *value = nir_load_constant_agx(
b, intr->num_components, dest_size, nir_load_ubo_base_agx(b, ubo_index),
nir_udiv_imm(b, offset, (dest_size / 8)),
.format =
(dest_size == 32) ? AGX_INTERNAL_FORMAT_I32 : AGX_INTERNAL_FORMAT_I16);
nir_ssa_def *address =
nir_iadd(b, nir_load_ubo_base_agx(b, ubo_index), nir_u2u64(b, offset));
nir_ssa_def *value = nir_load_global_constant(
b, address, nir_intrinsic_align(intr), intr->num_components,
nir_dest_bit_size(intr->dest));
nir_ssa_def_rewrite_uses(&intr->dest.ssa, value);
return true;