2 * Copyright © 2012 Intel Corporation
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:
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
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
24 * Eric Anholt <eric@anholt.net>
28 #include "util/bitset.h"
35 * Which variables are defined before being used in the block.
37 * Note that for our purposes, "defined" means unconditionally, completely
43 * Which variables are used before being defined in the block.
47 /** Which defs reach the entry point of the block. */
50 /** Which defs reach the exit point of the block. */
53 BITSET_WORD flag_def
[1];
54 BITSET_WORD flag_use
[1];
55 BITSET_WORD flag_livein
[1];
56 BITSET_WORD flag_liveout
[1];
59 class vec4_live_variables
{
61 DECLARE_RALLOC_CXX_OPERATORS(vec4_live_variables
)
63 vec4_live_variables(const simple_allocator
&alloc
, cfg_t
*cfg
);
64 ~vec4_live_variables();
69 /** Per-basic-block information on live variables */
70 struct block_data
*block_data
;
74 void compute_live_variables();
76 const simple_allocator
&alloc
;
81 /* Returns the variable index for the k-th dword of the c-th component of
85 var_from_reg(const simple_allocator
&alloc
, const src_reg
®
,
86 unsigned c
= 0, unsigned k
= 0)
88 assert(reg
.file
== VGRF
&& reg
.nr
< alloc
.count
&& c
< 4);
89 const unsigned csize
= DIV_ROUND_UP(type_sz(reg
.type
), 4);
91 8 * (alloc
.offsets
[reg
.nr
] + reg
.offset
/ REG_SIZE
) +
92 (BRW_GET_SWZ(reg
.swizzle
, c
) + k
/ csize
* 4) * csize
+ k
% csize
;
93 /* Do not exceed the limit for this register */
94 assert(result
< 8 * (alloc
.offsets
[reg
.nr
] + alloc
.sizes
[reg
.nr
]));
99 var_from_reg(const simple_allocator
&alloc
, const dst_reg
®
,
100 unsigned c
= 0, unsigned k
= 0)
102 assert(reg
.file
== VGRF
&& reg
.nr
< alloc
.count
&& c
< 4);
103 const unsigned csize
= DIV_ROUND_UP(type_sz(reg
.type
), 4);
105 8 * (alloc
.offsets
[reg
.nr
] + reg
.offset
/ REG_SIZE
) +
106 (c
+ k
/ csize
* 4) * csize
+ k
% csize
;
107 /* Do not exceed the limit for this register */
108 assert(result
< 8 * (alloc
.offsets
[reg
.nr
] + alloc
.sizes
[reg
.nr
]));
112 } /* namespace brw */