From: Antia Puentes <[email protected]>
Adds NIR ALU operations:
* nir_op_uadd_carry
* nir_op_usub_borrow
---
src/mesa/drivers/dri/i965/brw_vec4_nir.cpp | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
index 032c91b..dbe7997 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
@@ -799,6 +799,22 @@ vec4_visitor::nir_emit_alu(nir_alu_instr *instr)
inst->saturate = instr->dest.saturate;
break;
+ case nir_op_uadd_carry: {
+ struct brw_reg acc = retype(brw_acc_reg(8), BRW_REGISTER_TYPE_UD);
+
+ emit(ADDC(dst_null_ud(), op[0], op[1]));
+ emit(MOV(dst, src_reg(acc)));
+ break;
+ }
+
+ case nir_op_usub_borrow: {
+ struct brw_reg acc = retype(brw_acc_reg(8), BRW_REGISTER_TYPE_UD);
+
+ emit(SUBB(dst_null_ud(), op[0], op[1]));
+ emit(MOV(dst, src_reg(acc)));
+ break;
+ }
+
default:
unreachable("Unimplemented ALU operation");
}
--
2.1.4
_______________________________________________
mesa-dev mailing list
[email protected]
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
