i965: Implement nir_op_uadd_carry and _usub_borrow without accumulator.

[mesa.git] / src / mesa / drivers / dri / i965 / brw_fs_nir.cpp

diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index 198703281e6bf840b337a7bb0bfe6e162b20fa57..3099dc447ec40b8148763ff0f6e1e40b4cc22eac 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -835,29 +835,11 @@ fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr)
       bld.emit(SHADER_OPCODE_INT_QUOTIENT, result, op[0], op[1]);
       break;
 
-   case nir_op_uadd_carry: {
-      if (devinfo->gen >= 7)
-         no16("SIMD16 explicit accumulator operands unsupported\n");
-
-      struct brw_reg acc = retype(brw_acc_reg(dispatch_width),
-                                  BRW_REGISTER_TYPE_UD);
-
-      bld.ADDC(bld.null_reg_ud(), op[0], op[1]);
-      bld.MOV(result, fs_reg(acc));
-      break;
-   }
+   case nir_op_uadd_carry:
+      unreachable("Should have been lowered by carry_to_arith().");
 
-   case nir_op_usub_borrow: {
-      if (devinfo->gen >= 7)
-         no16("SIMD16 explicit accumulator operands unsupported\n");
-
-      struct brw_reg acc = retype(brw_acc_reg(dispatch_width),
-                                  BRW_REGISTER_TYPE_UD);
-
-      bld.SUBB(bld.null_reg_ud(), op[0], op[1]);
-      bld.MOV(result, fs_reg(acc));
-      break;
-   }
+   case nir_op_usub_borrow:
+      unreachable("Should have been lowered by borrow_to_arith().");
 
    case nir_op_umod:
       bld.emit(SHADER_OPCODE_INT_REMAINDER, result, op[0], op[1]);