diff options
| -rw-r--r-- | src/intel/compiler/brw_fs_nir.cpp | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/src/intel/compiler/brw_fs_nir.cpp b/src/intel/compiler/brw_fs_nir.cpp index 9ecfad99939..fb373e1757e 100644 --- a/src/intel/compiler/brw_fs_nir.cpp +++ b/src/intel/compiler/brw_fs_nir.cpp @@ -381,13 +381,30 @@ fs_visitor::nir_emit_cf_list(exec_list *list) void fs_visitor::nir_emit_if(nir_if *if_stmt) { + bool invert; + fs_reg cond_reg; + + /* If the condition has the form !other_condition, use other_condition as + * the source, but invert the predicate on the if instruction. + */ + nir_alu_instr *const cond = nir_src_as_alu_instr(&if_stmt->condition); + if (cond != NULL && cond->op == nir_op_inot) { + assert(!cond->src[0].negate); + assert(!cond->src[0].abs); + + invert = true; + cond_reg = get_nir_src(cond->src[0].src); + } else { + invert = false; + cond_reg = get_nir_src(if_stmt->condition); + } + /* first, put the condition into f0 */ fs_inst *inst = bld.MOV(bld.null_reg_d(), - retype(get_nir_src(if_stmt->condition), - BRW_REGISTER_TYPE_D)); + retype(cond_reg, BRW_REGISTER_TYPE_D)); inst->conditional_mod = BRW_CONDITIONAL_NZ; - bld.IF(BRW_PREDICATE_NORMAL); + bld.IF(BRW_PREDICATE_NORMAL)->predicate_inverse = invert; nir_emit_cf_list(&if_stmt->then_list); |