src/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 #ifndef __MIDGARD_OPS
  23 #define __MIDGARD_OPS
  24
  25 #include "helpers.h"
  26
  27 /* Forward declare */
  28
  29 extern struct mir_op_props alu_opcode_props[256];
  30 extern struct mir_ldst_op_props load_store_opcode_props[256];
  31 extern struct mir_tag_props midgard_tag_props[16];
  32
  33 #define OP_IS_STORE(op) (load_store_opcode_props[op].props & LDST_STORE)
  34
  35 /* Is this opcode that of an integer (regardless of signedness)? Instruction
  36  * names authoritatively determine types */
  37
  38 static inline bool
  39 midgard_is_integer_op(int op)
  40 {
  41         const char *name = alu_opcode_props[op].name;
  42
  43         if (!name)
  44                 return false;
  45
  46         return (name[0] == 'i') || (name[0] == 'u');
  47 }
  48
  49 /* Does this opcode *write* an integer? Same as is_integer_op, unless it's a
  50  * conversion between int<->float in which case we do the opposite */
  51
  52 static inline bool
  53 midgard_is_integer_out_op(int op)
  54 {
  55         bool is_int = midgard_is_integer_op(op);
  56         bool is_conversion = alu_opcode_props[op].props & OP_TYPE_CONVERT;
  57
  58         return is_int ^ is_conversion;
  59 }
  60
  61 /* Determines effective writemask, taking quirks and expansion into account */
  62
  63 static inline unsigned
  64 effective_writemask(midgard_vector_alu *alu, unsigned existing_mask)
  65 {
  66         /* Channel count is off-by-one to fit in two-bits (0 channel makes no
  67          * sense) */
  68
  69         unsigned channel_count = GET_CHANNEL_COUNT(alu_opcode_props[alu->op].props);
  70
  71         /* If there is a fixed channel count, construct the appropriate mask */
  72
  73         if (channel_count)
  74                 return (1 << channel_count) - 1;
  75
  76         return existing_mask;
  77 };
  78
  79 #endif