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agx: Implement load_global(_constant)

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Found in compute shaders, maps to a subset of device_load, and will be
used for some lowerings soon.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18525>
This commit is contained in:
Alyssa Rosenzweig 2022-09-09 16:59:23 -04:00 • committed by Marge Bot
parent 965cc62bdd
commit bc4f418cb4
1 changed files with 20 additions and 0 deletions
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20
src/asahi/compiler/agx_compile.c
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@ -507,6 +507,21 @@ agx_format_for_bits(unsigned bits)
}
}
static void
agx_emit_load_global(agx_builder *b, agx_index *dests, nir_intrinsic_instr *instr)
{
agx_index addr = agx_src_index(&instr->src[0]);
agx_index offset = agx_immediate(0);
enum agx_format fmt = agx_format_for_bits(nir_dest_bit_size(instr->dest));
agx_index vec = agx_vec_for_intr(b->shader, instr);
agx_device_load_to(b, vec, addr, offset, fmt,
BITFIELD_MASK(nir_dest_num_components(instr->dest)), 0);
agx_wait(b, 0);
agx_emit_split(b, dests, vec, 4);
}
static agx_instr *
agx_emit_load_ubo(agx_builder *b, agx_index dst, nir_intrinsic_instr *instr)
{
@ -622,6 +637,11 @@ agx_emit_intrinsic(agx_builder *b, nir_intrinsic_instr *instr)
break;
case nir_intrinsic_load_global:
case nir_intrinsic_load_global_constant:
agx_emit_load_global(b, dests, instr);
break;
case nir_intrinsic_store_output:
if (stage == MESA_SHADER_FRAGMENT)
return agx_emit_fragment_out(b, instr);