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ac/nir/ngg: support component position store

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Acked-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17651>
This commit is contained in:
Qiang Yu 2022-06-13 17:29:06 +08:00 • committed by Marge Bot
parent 1bdeb961bd
commit 620e62bb39
1 changed files with 38 additions and 5 deletions
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43
src/amd/common/ac_nir_lower_ngg.c
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@ -504,6 +504,31 @@ emit_store_ngg_nogs_es_primitive_id(nir_builder *b)
.src_type = nir_type_uint32, .io_semantics = io_sem);
}
static void
store_var_components(nir_builder *b, nir_variable *var, nir_ssa_def *value,
unsigned component, unsigned writemask)
{
/* component store */
if (value->num_components != 4) {
nir_ssa_def *undef = nir_ssa_undef(b, 1, value->bit_size);
/* add undef component before and after value to form a vec4 */
nir_ssa_def *comp[4];
for (int i = 0; i < 4; i++) {
comp[i] = (i >= component && i < component + value->num_components) ?
nir_channel(b, value, i - component) : undef;
}
value = nir_vec(b, comp, 4);
writemask <<= component;
} else {
/* if num_component==4, there should be no component offset */
assert(component == 0);
}
nir_store_var(b, var, value, writemask);
}
static bool
remove_culling_shader_output(nir_builder *b, nir_instr *instr, void *state)
{
@ -524,13 +549,21 @@ remove_culling_shader_output(nir_builder *b, nir_instr *instr, void *state)
b->cursor = nir_before_instr(instr);
/* no indirect output */
assert(nir_src_is_const(intrin->src[1]) && nir_src_as_uint(intrin->src[1]) == 0);
unsigned writemask = nir_intrinsic_write_mask(intrin);
unsigned component = nir_intrinsic_component(intrin);
nir_ssa_def *store_val = intrin->src[0].ssa;
/* Position output - store the value to a variable, remove output store */
nir_io_semantics io_sem = nir_intrinsic_io_semantics(intrin);
if (io_sem.location == VARYING_SLOT_POS) {
/* TODO: check if it's indirect, etc? */
unsigned writemask = nir_intrinsic_write_mask(intrin);
nir_ssa_def *store_val = intrin->src[0].ssa;
nir_store_var(b, s->pre_cull_position_value_var, store_val, writemask);
switch (io_sem.location) {
case VARYING_SLOT_POS:
store_var_components(b, s->pre_cull_position_value_var, store_val, component, writemask);
break;
default:
break;
}
/* Remove all output stores */