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nak: Use load_interpolated_input for frag_coord

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24998>
This commit is contained in:
Faith Ekstrand 2023-09-11 20:45:00 -05:00 • committed by Marge Bot
parent 0e327167a2
commit c47488341e
1 changed files with 17 additions and 4 deletions
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19
src/nouveau/compiler/nak_nir.c
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@ -426,11 +426,25 @@ nak_nir_lower_system_value_instr(nir_builder *b, nir_instr *instr, void *data)
nir_def *val;
nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
switch (intrin->intrinsic) {
case nir_intrinsic_load_frag_coord:
case nir_intrinsic_load_sample_pos: {
nir_def *bary = nir_load_barycentric_sample(b, 32,
.interp_mode = INTERP_MODE_SMOOTH);
const uint32_t addr = nak_sysval_attr_addr(SYSTEM_VALUE_FRAG_COORD);
val = nir_load_input(b, 2, 32, nir_imm_int(b, 0), .base = addr,
nir_def *coord_in =
nir_load_interpolated_input(b, 4, 32, bary, nir_imm_int(b, 0),
.base = addr,
.dest_type = nir_type_float32);
val = nir_ffract(b, val);
/* gl_FragCoord = (x, y, z, 1/w) */
val = nir_fdiv(b, nir_vec4(b, nir_channel(b, coord_in, 0),
nir_channel(b, coord_in, 1),
nir_channel(b, coord_in, 2),
nir_imm_float(b, 1.0f)),
nir_channel(b, coord_in, 3));
if (intrin->intrinsic == nir_intrinsic_load_sample_pos)
val = nir_ffract(b, nir_trim_vector(b, val, 2));
break;
}
@ -442,7 +456,6 @@ nak_nir_lower_system_value_instr(nir_builder *b, nir_instr *instr, void *data)
break;
}
case nir_intrinsic_load_frag_coord:
case nir_intrinsic_load_point_coord:
case nir_intrinsic_load_tess_coord:
case nir_intrinsic_load_instance_id: