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agx: Implement load_output 

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10720>
This commit is contained in:
Alyssa Rosenzweig 2021-05-04 23:00:55 -04:00
parent 1b9b2f9046
commit d0f566a90d
1 changed files with 26 additions and 0 deletions
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26
src/asahi/compiler/agx_compile.c
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@ -184,6 +184,28 @@ agx_emit_fragment_out(agx_builder *b, nir_intrinsic_instr *instr)
b->shader->key->fs.tib_formats[rt]);
}
static agx_instr *
agx_emit_load_tile(agx_builder *b, nir_intrinsic_instr *instr)
{
const nir_variable *var =
nir_find_variable_with_driver_location(b->shader->nir,
nir_var_shader_out, nir_intrinsic_base(instr));
assert(var);
unsigned loc = var->data.location;
assert(var->data.index == 0 && "todo: dual-source blending");
assert(loc == FRAG_RESULT_DATA0 && "todo: MRT");
unsigned rt = (loc - FRAG_RESULT_DATA0);
/* TODO: Reverse-engineer interactions with MRT */
agx_writeout(b, 0xC200);
agx_writeout(b, 0x0008);
b->shader->did_writeout = true;
return agx_ld_tile_to(b, agx_dest_index(&instr->dest),
b->shader->key->fs.tib_formats[rt]);
}
static enum agx_format
agx_format_for_bits(unsigned bits)
{
@ -280,6 +302,10 @@ agx_emit_intrinsic(agx_builder *b, nir_intrinsic_instr *instr)
else
unreachable("Unsupported shader stage");
case nir_intrinsic_load_output:
assert(stage == MESA_SHADER_FRAGMENT);
return agx_emit_load_tile(b, instr);
case nir_intrinsic_load_ubo:
case nir_intrinsic_load_kernel_input:
return agx_emit_load_ubo(b, instr);