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agx: Implement ld_vary_flat

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Not clear what any of this is for but let's be nice and match the blob.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11718>
This commit is contained in:
Alyssa Rosenzweig 2021-06-06 14:05:20 -04:00 • committed by Marge Bot
parent 3eab648d6b
commit bf8d1734fd
1 changed files with 30 additions and 12 deletions
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42
src/asahi/compiler/agx_compile.c
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@ -115,24 +115,39 @@ agx_emit_load_attr(agx_builder *b, nir_intrinsic_instr *instr)
}
static agx_instr *
agx_emit_load_vary(agx_builder *b, nir_intrinsic_instr *instr)
agx_emit_load_vary_flat(agx_builder *b, nir_intrinsic_instr *instr)
{
unsigned components = instr->num_components;
bool smooth = instr->intrinsic == nir_intrinsic_load_interpolated_input;
assert(components >= 1 && components <= 4);
if (smooth) {
nir_intrinsic_instr *parent = nir_src_as_intrinsic(instr->src[0]);
assert(parent);
nir_src *offset = nir_get_io_offset_src(instr);
assert(nir_src_is_const(*offset) && "no indirects");
unsigned imm_index = nir_intrinsic_base(instr) + nir_src_as_uint(*offset);
/* TODO: Interpolation modes */
assert(parent->intrinsic ==
nir_intrinsic_load_barycentric_pixel);
} else {
/* TODO: flat varyings */
agx_index chan[4] = { agx_null() };
for (unsigned i = 0; i < components; ++i) {
/* vec3 for each vertex, unknown what first 2 channels are for */
agx_index values = agx_ld_vary_flat(b, agx_immediate(imm_index + i), 1);
chan[i] = agx_p_extract(b, values, 2);
}
return agx_p_combine_to(b, agx_dest_index(&instr->dest),
chan[0], chan[1], chan[2], chan[3]);
}
static agx_instr *
agx_emit_load_vary(agx_builder *b, nir_intrinsic_instr *instr)
{
ASSERTED unsigned components = instr->num_components;
ASSERTED nir_intrinsic_instr *parent = nir_src_as_intrinsic(instr->src[0]);
assert(components >= 1 && components <= 4);
assert(parent);
/* TODO: Interpolation modes */
assert(parent->intrinsic == nir_intrinsic_load_barycentric_pixel);
nir_src *offset = nir_get_io_offset_src(instr);
assert(nir_src_is_const(*offset) && "no indirects");
unsigned imm_index = (4 * nir_intrinsic_base(instr)) + nir_src_as_uint(*offset);
@ -307,9 +322,12 @@ agx_emit_intrinsic(agx_builder *b, nir_intrinsic_instr *instr)
/* handled later via load_vary */
return NULL;
case nir_intrinsic_load_interpolated_input:
assert(stage == MESA_SHADER_FRAGMENT);
return agx_emit_load_vary(b, instr);
case nir_intrinsic_load_input:
if (stage == MESA_SHADER_FRAGMENT)
return agx_emit_load_vary(b, instr);
return agx_emit_load_vary_flat(b, instr);
else if (stage == MESA_SHADER_VERTEX)
return agx_emit_load_attr(b, instr);
else