---
src/intel/compiler/brw_fs_nir.cpp | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/src/intel/compiler/brw_fs_nir.cpp
b/src/intel/compiler/brw_fs_nir.cpp
index 4f815fef891..3f98c6a4474 100644
--- a/src/intel/compiler/brw_fs_nir.cpp
+++ b/src/intel/compiler/brw_fs_nir.cpp
@@ -921,6 +921,24 @@ fs_visitor::nir_emit_alu(const fs_builder &bld,
nir_alu_instr *instr)
inst->saturate = instr->dest.saturate;
break;
+ case nir_op_f2i8:
+ case nir_op_f2u8:
+ /* BDW PRM, vol02, Command Reference Instructions, mov - MOVE:
+ *
+ * "There is no direct conversion from B/UB to DF or DF to B/UB. Use
+ * two instructions and a word or DWord intermediate type."
+ */
+ if (nir_src_bit_size(instr->src[0].src) == 64 &&
+ nir_dest_bit_size(instr->dest.dest) == 8) {
+ fs_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_F, 1);
+ inst = bld.MOV(tmp, op[0]);
+ inst->saturate = instr->dest.saturate;
+ inst = bld.MOV(result, tmp);
+ inst->saturate = instr->dest.saturate;
+ break;
+ }
+ /* Fallthrough */
+
case nir_op_f2f32:
case nir_op_f2i32:
case nir_op_f2u32:
--
2.17.1
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-dev
