diff options
Diffstat (limited to 'mesalib/src/glsl/opt_algebraic.cpp')
| -rw-r--r-- | mesalib/src/glsl/opt_algebraic.cpp | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/mesalib/src/glsl/opt_algebraic.cpp b/mesalib/src/glsl/opt_algebraic.cpp index 8494bd9ec..9d5539252 100644 --- a/mesalib/src/glsl/opt_algebraic.cpp +++ b/mesalib/src/glsl/opt_algebraic.cpp @@ -45,10 +45,11 @@ namespace { class ir_algebraic_visitor : public ir_rvalue_visitor { public: - ir_algebraic_visitor() + ir_algebraic_visitor(bool native_integers) { this->progress = false; this->mem_ctx = NULL; + this->native_integers = native_integers; } virtual ~ir_algebraic_visitor() @@ -70,6 +71,7 @@ public: void *mem_ctx; + bool native_integers; bool progress; }; @@ -445,6 +447,28 @@ ir_algebraic_visitor::handle_expression(ir_expression *ir) } break; + case ir_binop_less: + case ir_binop_lequal: + case ir_binop_greater: + case ir_binop_gequal: + case ir_binop_equal: + case ir_binop_nequal: + for (int add_pos = 0; add_pos < 2; add_pos++) { + ir_expression *add = op_expr[add_pos]; + + if (!add || add->operation != ir_binop_add) + continue; + + ir_constant *zero = op_const[1 - add_pos]; + if (!is_vec_zero(zero)) + continue; + + return new(mem_ctx) ir_expression(ir->operation, + add->operands[0], + neg(add->operands[1])); + } + break; + case ir_binop_rshift: case ir_binop_lshift: /* 0 >> x == 0 */ @@ -623,9 +647,9 @@ ir_algebraic_visitor::handle_rvalue(ir_rvalue **rvalue) } bool -do_algebraic(exec_list *instructions) +do_algebraic(exec_list *instructions, bool native_integers) { - ir_algebraic_visitor v; + ir_algebraic_visitor v(native_integers); visit_list_elements(&v, instructions); |