- brw_ADD(p, c->reg.t, c->reg.dp1, negate(c->reg.dp0));
- brw_math_invert(p, c->reg.t, c->reg.t);
- brw_MUL(p, c->reg.t, c->reg.t, c->reg.dp1);
-
- brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_G, c->reg.t, c->reg.t1 );
- brw_MOV(p, c->reg.t1, c->reg.t);
- brw_set_predicate_control(p, BRW_PREDICATE_NONE);
+ /*
+ * Both can be negative on GM965/G965 due to RHW workaround
+ * if so, this object should be rejected.
+ */
+ if (brw->has_negative_rhw_bug) {
+ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_LE, c->reg.dp0, brw_imm_f(0.0));
+ brw_IF(p, BRW_EXECUTE_1);
+ {
+ brw_clip_kill_thread(c);
+ }
+ brw_ENDIF(p);
+ }
+
+ brw_ADD(p, c->reg.t, c->reg.dp1, negate(c->reg.dp0));
+ brw_math_invert(p, c->reg.t, c->reg.t);
+ brw_MUL(p, c->reg.t, c->reg.t, c->reg.dp1);
+
+ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_G, c->reg.t, c->reg.t1 );
+ brw_MOV(p, c->reg.t1, c->reg.t);
+ brw_set_predicate_control(p, BRW_PREDICATE_NONE);