1 /**************************************************************************
3 * Copyright 2012 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 #include "lp_bld_const.h"
29 #include "lp_bld_struct.h"
30 #include "lp_bld_format.h"
31 #include "lp_bld_debug.h"
32 #include "lp_bld_type.h"
33 #include "lp_bld_conv.h"
34 #include "lp_bld_pack.h"
35 #include "lp_bld_intr.h"
36 #include "lp_bld_gather.h"
38 #include "util/u_memory.h"
39 #include "util/u_format.h"
40 #include "pipe/p_state.h"
45 * @brief lp_build_fetch_rgba_aos_array
47 * \param format_desc describes format of the image we're fetching from
48 * \param dst_type output type
49 * \param base_ptr address of the pixel block (or the texel if uncompressed)
50 * \param offset ptr offset
53 lp_build_fetch_rgba_aos_array(struct gallivm_state
*gallivm
,
54 const struct util_format_description
*format_desc
,
55 struct lp_type dst_type
,
56 LLVMValueRef base_ptr
,
59 struct lp_build_context bld
;
60 LLVMBuilderRef builder
= gallivm
->builder
;
61 LLVMTypeRef src_vec_type
;
62 LLVMValueRef ptr
, res
= NULL
;
63 struct lp_type src_type
;
64 boolean pure_integer
= format_desc
->channel
[0].pure_integer
;
65 struct lp_type tmp_type
;
67 lp_type_from_format_desc(&src_type
, format_desc
);
69 assert(src_type
.length
<= dst_type
.length
);
71 src_vec_type
= lp_build_vec_type(gallivm
, src_type
);
74 * Read whole vector from memory, unaligned.
75 * XXX: Note it's actually aligned to element type. Not sure if all
76 * callers are able to guarantee that (whereas for others, we should
77 * be able to use full alignment when there's 2 or 4 channels).
78 * (If all callers can guarantee element type alignment, we should
79 * relax alignment restrictions elsewhere.)
81 ptr
= LLVMBuildGEP(builder
, base_ptr
, &offset
, 1, "");
82 ptr
= LLVMBuildPointerCast(builder
, ptr
, LLVMPointerType(src_vec_type
, 0), "");
83 res
= LLVMBuildLoad(builder
, ptr
, "");
84 LLVMSetAlignment(res
, src_type
.width
/ 8);
86 /* Truncate doubles to float */
87 if (src_type
.floating
&& src_type
.width
== 64) {
89 src_vec_type
= lp_build_vec_type(gallivm
, src_type
);
91 res
= LLVMBuildFPTrunc(builder
, res
, src_vec_type
, "");
94 /* Expand to correct length */
95 if (src_type
.length
< dst_type
.length
) {
96 res
= lp_build_pad_vector(gallivm
, res
, dst_type
.length
);
97 src_type
.length
= dst_type
.length
;
102 /* some callers expect (fake) floats other real ints. */
103 tmp_type
.floating
= 0;
104 tmp_type
.sign
= src_type
.sign
;
107 /* Convert to correct format */
108 lp_build_conv(gallivm
, src_type
, tmp_type
, &res
, 1, &res
, 1);
111 lp_build_context_init(&bld
, gallivm
, tmp_type
);
112 res
= lp_build_format_swizzle_aos(format_desc
, &bld
, res
);
114 /* Bitcast to floats (for pure integers) when requested */
115 if (pure_integer
&& dst_type
.floating
) {
116 res
= LLVMBuildBitCast(builder
, res
, lp_build_vec_type(gallivm
, dst_type
), "");