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      1 /* Copyright (c) 2018-2019 Alyssa Rosenzweig (alyssa (at) rosenzweig.io)
      2  * Copyright (C) 2019-2020 Collabora, Ltd.
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a copy
      5  * of this software and associated documentation files (the "Software"), to deal
      6  * in the Software without restriction, including without limitation the rights
      7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      8  * copies of the Software, and to permit persons to whom the Software is
      9  * furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice shall be included in
     12  * all copies or substantial portions of the Software.
     13  *
     14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     20  * THE SOFTWARE.
     21  */
     22 
     23 #ifndef __MIDGARD_OPS
     24 #define __MIDGARD_OPS
     25 
     26 #include "helpers.h"
     27 
     28 /* Forward declare */
     29 
     30 extern struct mir_op_props alu_opcode_props[256];
     31 extern struct mir_ldst_op_props load_store_opcode_props[256];
     32 extern struct mir_tex_op_props tex_opcode_props[16];
     33 extern struct mir_tag_props midgard_tag_props[16];
     34 
     35 #define OP_IS_ATOMIC(op) (load_store_opcode_props[op].props & LDST_ATOMIC)
     36 #define OP_USES_ATTRIB(op) (load_store_opcode_props[op].props & LDST_ATTRIB)
     37 #define OP_IS_STORE(op) (load_store_opcode_props[op].props & LDST_STORE)
     38 #define OP_HAS_ADDRESS(op) (load_store_opcode_props[op].props & LDST_ADDRESS)
     39 
     40 /* Is this opcode that of an integer (regardless of signedness)? Instruction
     41  * names authoritatively determine types */
     42 
     43 static inline bool
     44 midgard_is_integer_op(int op)
     45 {
     46         return (op >= 0x40 && op <= 0x7E) || (op >= 0xA0 && op <= 0xC1);
     47 }
     48 
     49 static inline bool
     50 midgard_is_unsigned_op(int op)
     51 {
     52         assert(midgard_is_integer_op(op));
     53 
     54         switch (op) {
     55         case midgard_alu_op_uaddsat:
     56         case midgard_alu_op_usubsat:
     57         case midgard_alu_op_uwmul:
     58         case midgard_alu_op_umin:
     59         case midgard_alu_op_umax:
     60         case midgard_alu_op_uavg:
     61         case midgard_alu_op_uravg:
     62         case midgard_alu_op_ushlsat:
     63         case midgard_alu_op_uabsdiff:
     64         case midgard_alu_op_ult:
     65         case midgard_alu_op_ule:
     66         case midgard_alu_op_uball_lt:
     67         case midgard_alu_op_uball_lte:
     68         case midgard_alu_op_ubany_lt:
     69         case midgard_alu_op_ubany_lte:
     70         case midgard_alu_op_u2f_rte:
     71         case midgard_alu_op_u2f_rtz:
     72         case midgard_alu_op_u2f_rtn:
     73         case midgard_alu_op_u2f_rtp:
     74                 return true;
     75         default:
     76                 return false;
     77         }
     78 }
     79 
     80 /* Does this opcode *write* an integer? Same as is_integer_op, unless it's a
     81  * conversion between int<->float in which case we do the opposite */
     82 
     83 static inline bool
     84 midgard_is_integer_out_op(int op)
     85 {
     86         bool is_int = midgard_is_integer_op(op);
     87         bool is_conversion = alu_opcode_props[op].props & OP_TYPE_CONVERT;
     88 
     89         return is_int ^ is_conversion;
     90 }
     91 
     92 /* Determines effective writemask, taking quirks and expansion into account */
     93 
     94 static inline unsigned
     95 effective_writemask(midgard_alu_op op, unsigned existing_mask)
     96 {
     97         /* Channel count is off-by-one to fit in two-bits (0 channel makes no
     98          * sense) */
     99 
    100         unsigned channel_count = GET_CHANNEL_COUNT(alu_opcode_props[op].props);
    101 
    102         /* If there is a fixed channel count, construct the appropriate mask */
    103 
    104         if (channel_count)
    105                 return (1 << channel_count) - 1;
    106 
    107         return existing_mask;
    108 };
    109 
    110 #endif
    111