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r600: add sample_lz and sample_c_lz opcodes compatibility

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This change generates a better code and maintains the
compatibility with the array sampler types.

Signed-off-by: Patrick Lerda <patrick9876@free.fr>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39915>
This commit is contained in:
Patrick Lerda 2026-02-16 13:21:04 +01:00 • committed by Marge Bot
parent 7513f48edf
commit 19a22b9382
1 changed files with 22 additions and 3 deletions
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25
src/gallium/drivers/r600/sfn/sfn_instr_tex.cpp
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@ -758,6 +758,10 @@ TexInstr::prepare_source(nir_tex_instr *tex, const Inputs& inputs, Shader& shade
return src_coord;
}
enum backend2_ucm {
backend2_ucm_lz = 1 << 8,
};
TexInstr::Inputs::Inputs(const nir_tex_instr& instr, ValueFactory& vf):
sampler_deref(nullptr),
texture_deref(nullptr),
@ -854,6 +858,12 @@ TexInstr::Inputs::get_opcode(const nir_tex_instr& instr) -> Opcode
case nir_texop_txb:
return instr.is_shadow ? sample_c_lb : sample_lb;
case nir_texop_txl:
if (backend2) {
const auto params = nir_src_as_const_value(*backend2);
const int32_t coord_mask = params[0].i32;
if (unlikely(coord_mask & backend2_ucm_lz))
return instr.is_shadow ? sample_c_lz : sample_lz;
}
return instr.is_shadow ? sample_c_l : sample_l;
case nir_texop_txs:
return get_resinfo;
@ -1195,10 +1205,19 @@ LowerTexToBackend::prepare_coord(nir_tex_instr *tex,
int idx = tex->op == nir_texop_txl ? nir_tex_instr_src_index(tex, nir_tex_src_lod)
: nir_tex_instr_src_index(tex, nir_tex_src_bias);
assert(idx != -1);
new_coord[3] = tex->src[idx].src.ssa;
if (comp_idx >= 0)
new_coord[2] = tex->src[comp_idx].src.ssa;
if (unlikely(tex->op == nir_texop_txl && nir_src_is_const(tex->src[idx].src) &&
nir_src_as_uint(tex->src[idx].src) == 0)) {
used_coord_mask |= backend2_ucm_lz;
if (comp_idx >= 0)
new_coord[3] = tex->src[comp_idx].src.ssa;
} else {
new_coord[3] = tex->src[idx].src.ssa;
if (comp_idx >= 0)
new_coord[2] = tex->src[comp_idx].src.ssa;
}
} else if (comp_idx >= 0) {
new_coord[3] = tex->src[comp_idx].src.ssa;
}