src/freedreno/ir3/regmask.h

   1 /*
   2  * Copyright (c) 2013 Rob Clark <robdclark@gmail.com>
   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 FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23
  24 #ifndef REGMASK_H_
  25 #define REGMASK_H_
  26
  27 #include <string.h>
  28 #include "util/bitset.h"
  29
  30 #define MAX_REG 256
  31
  32 typedef BITSET_DECLARE(regmaskstate_t, 2 * MAX_REG);
  33
  34 typedef struct {
  35         bool mergedregs;
  36         regmaskstate_t mask;
  37 } regmask_t;
  38
  39 static inline bool
  40 __regmask_get(regmask_t *regmask, bool half, unsigned n)
  41 {
  42         if (regmask->mergedregs) {
  43                 /* a6xx+ case, with merged register file, we track things in terms
  44                  * of half-precision registers, with a full precisions register
  45                  * using two half-precision slots:
  46                  */
  47                 if (half) {
  48                         return BITSET_TEST(regmask->mask, n);
  49                 } else {
  50                         n *= 2;
  51                         return BITSET_TEST(regmask->mask, n) ||
  52                                 BITSET_TEST(regmask->mask, n+1);
  53                 }
  54         } else {
  55                 /* pre a6xx case, with separate register file for half and full
  56                  * precision:
  57                  */
  58                 if (half)
  59                         n += MAX_REG;
  60                 return BITSET_TEST(regmask->mask, n);
  61         }
  62 }
  63
  64 static inline void
  65 __regmask_set(regmask_t *regmask, bool half, unsigned n)
  66 {
  67         if (regmask->mergedregs) {
  68                 /* a6xx+ case, with merged register file, we track things in terms
  69                  * of half-precision registers, with a full precisions register
  70                  * using two half-precision slots:
  71                  */
  72                 if (half) {
  73                         BITSET_SET(regmask->mask, n);
  74                 } else {
  75                         n *= 2;
  76                         BITSET_SET(regmask->mask, n);
  77                         BITSET_SET(regmask->mask, n+1);
  78                 }
  79         } else {
  80                 /* pre a6xx case, with separate register file for half and full
  81                  * precision:
  82                  */
  83                 if (half)
  84                         n += MAX_REG;
  85                 BITSET_SET(regmask->mask, n);
  86         }
  87 }
  88
  89 static inline void
  90 regmask_init(regmask_t *regmask, bool mergedregs)
  91 {
  92         memset(&regmask->mask, 0, sizeof(regmask->mask));
  93         regmask->mergedregs = mergedregs;
  94 }
  95
  96 static inline void
  97 regmask_or(regmask_t *dst, regmask_t *a, regmask_t *b)
  98 {
  99         assert(dst->mergedregs == a->mergedregs);
 100         assert(dst->mergedregs == b->mergedregs);
 101
 102         for (unsigned i = 0; i < ARRAY_SIZE(dst->mask); i++)
 103                 dst->mask[i] = a->mask[i] | b->mask[i];
 104 }
 105
 106 #endif /* REGMASK_H_ */