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i965: Mask out higher bits of the result of BRW_CMP producing a boolean.

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When it says it sets the LSB, that's not just a hint as to where the
result goes.  Only the LSB is modified.  Fixes 20 piglit cases.
This commit is contained in:
Eric Anholt 2010-08-27 13:49:09 -07:00
parent 4229a93cc7
commit 38d01c5b27
1 changed files with 6 additions and 0 deletions
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6
src/mesa/drivers/dri/i965/brw_fs.cpp
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@ -710,26 +710,32 @@ fs_visitor::visit(ir_expression *ir)
case ir_binop_less:
inst = emit(fs_inst(BRW_OPCODE_CMP, this->result, op[0], op[1]));
inst->conditional_mod = BRW_CONDITIONAL_L;
emit(fs_inst(BRW_OPCODE_AND, this->result, this->result, fs_reg(0x1)));
break;
case ir_binop_greater:
inst = emit(fs_inst(BRW_OPCODE_CMP, this->result, op[0], op[1]));
inst->conditional_mod = BRW_CONDITIONAL_G;
emit(fs_inst(BRW_OPCODE_AND, this->result, this->result, fs_reg(0x1)));
break;
case ir_binop_lequal:
inst = emit(fs_inst(BRW_OPCODE_CMP, this->result, op[0], op[1]));
inst->conditional_mod = BRW_CONDITIONAL_LE;
emit(fs_inst(BRW_OPCODE_AND, this->result, this->result, fs_reg(0x1)));
break;
case ir_binop_gequal:
inst = emit(fs_inst(BRW_OPCODE_CMP, this->result, op[0], op[1]));
inst->conditional_mod = BRW_CONDITIONAL_GE;
emit(fs_inst(BRW_OPCODE_AND, this->result, this->result, fs_reg(0x1)));
break;
case ir_binop_equal:
inst = emit(fs_inst(BRW_OPCODE_CMP, this->result, op[0], op[1]));
inst->conditional_mod = BRW_CONDITIONAL_Z;
emit(fs_inst(BRW_OPCODE_AND, this->result, this->result, fs_reg(0x1)));
break;
case ir_binop_nequal:
inst = emit(fs_inst(BRW_OPCODE_CMP, this->result, op[0], op[1]));
inst->conditional_mod = BRW_CONDITIONAL_NZ;
emit(fs_inst(BRW_OPCODE_AND, this->result, this->result, fs_reg(0x1)));
break;
case ir_binop_logic_xor: