On Mon, Aug 18, 2014 at 5:17 AM, Abdiel Janulgue
<[email protected]> wrote:
> + /* If the last instruction from our accept() generated our
> + * src, just set the saturate flag instead of emmitting a separate mov.
emitting.
> */
> fs_inst *modify = get_instruction_generating_reg(pre_inst, last_inst,
> src);
> - if (!modify || modify->regs_written != 1) {
> - this->result = fs_reg(this, ir->type);
> - fs_inst *inst = emit(MOV(this->result, src));
> - inst->saturate = true;
> - } else {
> + if (modify && modify->regs_written == 1) {
> modify->saturate = true;
> this->result = src;
> + return true;
> }
I was going to tell you that you need to call
backend_instruction::can_do_saturate() here, but ir_unop_saturate only
operates on floats, and all i965 instructions that operate on floats
can saturate.
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