/*
* Copyright © 2006 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Wang Zhenyu <zhenyu.z.wang@intel.com>
* Keith Packard <keithp@keithp.com>
*/
/* Sample the src surface */
include(`exa_wm.g4i')
/* Ivybridge uses GRFs in SEND instruction */
define(`src_msg_gen7', `g65')
define(`src_msg_ind_gen7',`65')
/* subpicture global alpha */
define(`global_alpha', `r6.0<0,1,0>f')
/* prepare sampler read back gX register, which would be written back to output */
/* use simd16 sampler, param 0 is u, param 1 is v. */
/* 'payload' loading, assuming tex coord start from g4 */
/* load argb */
mov (1) g0.8<1>UD 0x00000000UD { align1 mask_disable };
mov (8) src_msg_gen7<1>UD g0<8,8,1>UD { align1 mask_disable };
/* src_msg will be copied with g0, as it contains send desc */
/* emit sampler 'send' cmd */
send (16) src_msg_ind_gen7 /* msg reg index */
src_sample_base<1>UW /* readback */
null
sampler (1,0,F) /* sampler message description, (binding_table,sampler_index,datatype)
/* here(src->dst) we should use src_sampler and src_surface */
mlen 5 rlen 8 { align1 }; /* required message len 5, readback len 8 */
mul (8) src_sample_a_01<1>f src_sample_a_01<8,8,1>f global_alpha { align1 mask_disable };
mul (8) src_sample_a_23<1>f src_sample_a_23<8,8,1>f global_alpha { align1 mask_disable };