1/*
2 * Copyright © 2006 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 *    Wang Zhenyu <zhenyu.z.wang@intel.com>
25 *    Keith Packard <keithp@keithp.com>
26 */
27
28/* Sample the src surface */
29
30include(`exa_wm.g4i')
31
32/* prepare sampler read back gX register, which would be written back to output */
33
34/* use simd16 sampler, param 0 is u, param 1 is v. */
35/* 'payload' loading, assuming tex coord start from g4 */
36
37/* load alpha */
38mov (1) g0.8<1>UD	0x00007000UD { align1 mask_disable };
39mov (8) g65<1>UD g0<8,8,1>UD { align1 }; /* copy to msg start reg*/
40
41/* g65 will be copied with g0, as it contains send desc */
42/* emit sampler 'send' cmd */
43send (16) 65		/* msg reg index */
44	src_sample_a_01<1>UW 	/* readback */
45	null
46	sampler (1,0,F)		/* sampler message description, (binding_table,sampler_index,datatype)
47				/* here(src->dst) we should use src_sampler and src_surface */
48	mlen 5 rlen 2 { align1 };   /* required message len 5, readback len 8 */
49