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ir_to_mesa: Do not emit OPCODE_SLE or OPCODE_SGT 

Nothing that consumes the output of this backend consumes them
navtively.  This is the way i915 has implemented these instructions
since it began consuming GLSL.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Ian Romanick 2016-04-12 17:30:25 -07:00
parent e46ac18ebe
commit 15e6a1a3be
1 changed files with 12 additions and 2 deletions
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14
src/mesa/program/ir_to_mesa.cpp
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@ -1067,10 +1067,20 @@ ir_to_mesa_visitor::visit(ir_expression *ir)
emit(ir, OPCODE_SLT, result_dst, op[0], op[1]);
break;
case ir_binop_greater:
emit(ir, OPCODE_SGT, result_dst, op[0], op[1]);
/* Negating the operands (as opposed to switching the order of the
* operands) produces the correct result when both are +/-Inf.
*/
op[0].negate = ~op[0].negate;
op[1].negate = ~op[1].negate;
emit(ir, OPCODE_SLT, result_dst, op[0], op[1]);
break;
case ir_binop_lequal:
emit(ir, OPCODE_SLE, result_dst, op[0], op[1]);
/* Negating the operands (as opposed to switching the order of the
* operands) produces the correct result when both are +/-Inf.
*/
op[0].negate = ~op[0].negate;
op[1].negate = ~op[1].negate;
emit(ir, OPCODE_SGE, result_dst, op[0], op[1]);
break;
case ir_binop_gequal:
emit(ir, OPCODE_SGE, result_dst, op[0], op[1]);