Used to enable 16-bit reads at do_untyped_vector_read, that is used on
the following intrinsics:
* nir_intrinsic_load_shared
* nir_intrinsic_load_ssbo
v2: Removed use of stride = 2 on 16-bit sources (Jason Ekstrand)
v3: - Add bitsize to scattered read operation (Jason Ekstrand)
- Remove implementation of 16-bit UBO read from this patch.
- Avoid assertion at opt_algebraic caused by ADD of two IMM with
offset with BRW_REGISTER_TYPE_UD type found on matrix tests.
(Jose Maria Casanova)
---
src/intel/compiler/brw_fs_nir.cpp | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/src/intel/compiler/brw_fs_nir.cpp
b/src/intel/compiler/brw_fs_nir.cpp
index ff04e2468b..726b2fcee7 100644
--- a/src/intel/compiler/brw_fs_nir.cpp
+++ b/src/intel/compiler/brw_fs_nir.cpp
@@ -2353,6 +2353,18 @@ do_untyped_vector_read(const fs_builder &bld,
bld.ADD(read_offset, read_offset, brw_imm_ud(16));
}
+ } else if (type_sz(dest.type) == 2) {
+ fs_reg read_offset = bld.vgrf(BRW_REGISTER_TYPE_UD);
+ bld.MOV(read_offset, offset_reg);
+ for (unsigned i = 0; i < num_components; i++) {
+ fs_reg read_reg = emit_byte_scattered_read(bld, surf_index,
read_offset,
+ 1 /* dims */,
+ 1,
+ 16 /*bit_size */,
+ BRW_PREDICATE_NONE);
+ bld.MOV(offset(dest,bld,i), subscript(read_reg, dest.type, 0));
+ bld.ADD(read_offset, read_offset, brw_imm_ud(type_sz(dest.type)));
+ }
} else {
unreachable("Unsupported type");
}
@@ -3929,7 +3941,6 @@ fs_visitor::nir_emit_intrinsic(const fs_builder &bld,
nir_intrinsic_instr *instr
if (const_offset == NULL) {
fs_reg base_offset = retype(get_nir_src(instr->src[1]),
BRW_REGISTER_TYPE_UD);
-
for (int i = 0; i < instr->num_components; i++)
VARYING_PULL_CONSTANT_LOAD(bld, offset(dest, bld, i), surf_index,
base_offset, i * type_sz(dest.type));
--
2.14.3
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