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ac/nir/lower_legacy_gs: Implement packed 16-bit GS outputs in non-dedicated slots.

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Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Georg Lehmann <dadschoorse@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28765>
This commit is contained in:
Timur Kristóf 2024-04-14 23:48:17 +02:00
parent abfce64880
commit c6c9da0336
1 changed files with 16 additions and 1 deletions
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17
src/amd/common/ac_nir.c
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@ -1076,9 +1076,24 @@ lower_legacy_gs_store_output(nir_builder *b, nir_intrinsic_instr *intrin,
/* 64bit output has been lowered to 32bit */
assert(store_val->bit_size <= 32);
/* 16-bit output stored in a normal varying slot that isn't a dedicated 16-bit slot. */
const bool non_dedicated_16bit = sem.location < VARYING_SLOT_VAR0_16BIT && store_val->bit_size == 16;
u_foreach_bit (i, write_mask) {
unsigned comp = component + i;
outputs[comp] = nir_channel(b, store_val, i);
nir_def *store_component = nir_channel(b, store_val, i);
if (non_dedicated_16bit) {
if (sem.high_16bits) {
nir_def *lo = outputs[comp] ? nir_unpack_32_2x16_split_x(b, outputs[comp]) : nir_imm_intN_t(b, 0, 16);
outputs[comp] = nir_pack_32_2x16_split(b, lo, store_component);
} else {
nir_def *hi = outputs[comp] ? nir_unpack_32_2x16_split_y(b, outputs[comp]) : nir_imm_intN_t(b, 0, 16);
outputs[comp] = nir_pack_32_2x16_split(b, store_component, hi);
}
} else {
outputs[comp] = store_component;
}
}
nir_instr_remove(&intrin->instr);