src/gallium/drivers/panfrost/midgard/midgard_ops.h

   1 /* Copyright (c) 2018-2019 Alyssa Rosenzweig (alyssa@rosenzweig.io)
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a copy
   4  * of this software and associated documentation files (the "Software"), to deal
   5  * in the Software without restriction, including without limitation the rights
   6  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   7  * copies of the Software, and to permit persons to whom the Software is
   8  * furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice shall be included in
  11  * all copies or substantial portions of the Software.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  18  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  19  * THE SOFTWARE.
  20  */
  21
  22 #include "helpers.h"
  23
  24 /* Forward declare */
  25
  26 extern struct mir_op_props alu_opcode_props[256];
  27 extern const char *load_store_opcode_names[256];
  28
  29 /* Is this opcode that of an integer (regardless of signedness)? Instruction
  30  * names authoritatively determine types */
  31
  32 static inline bool
  33 midgard_is_integer_op(int op)
  34 {
  35         const char *name = alu_opcode_props[op].name;
  36
  37         if (!name)
  38                 return false;
  39
  40         return (name[0] == 'i') || (name[0] == 'u');
  41 }
  42
  43 /* Does this opcode *write* an integer? Same as is_integer_op, unless it's a
  44  * conversion between int<->float in which case we do the opposite */
  45
  46 static inline bool
  47 midgard_is_integer_out_op(int op)
  48 {
  49         bool is_int = midgard_is_integer_op(op);
  50         bool is_conversion = alu_opcode_props[op].props & OP_TYPE_CONVERT;
  51
  52         return is_int ^ is_conversion;
  53 }
  54
  55 /* Determines effective writemask, taking quirks and expansion into account */
  56 static inline unsigned
  57 effective_writemask(midgard_vector_alu *alu)
  58 {
  59         /* Channel count is off-by-one to fit in two-bits (0 channel makes no
  60          * sense) */
  61
  62         unsigned channel_count = GET_CHANNEL_COUNT(alu_opcode_props[alu->op].props);
  63
  64         /* If there is a fixed channel count, construct the appropriate mask */
  65
  66         if (channel_count)
  67                 return (1 << channel_count) - 1;
  68
  69         /* Otherwise, just squeeze the existing mask */
  70         return squeeze_writemask(alu->mask);
  71 }
  72
  73
  74