src/gallium/drivers/r300/compiler/radeon_swizzle.h

   1 /*
   2  * Copyright (C) 2009 Nicolai Haehnle.
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sublicense, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  */
  27
  28 #ifndef RADEON_SWIZZLE_H
  29 #define RADEON_SWIZZLE_H
  30
  31 #include "radeon_program.h"
  32
  33 struct rc_swizzle_split {
  34         unsigned char NumPhases;
  35         unsigned char Phase[4];
  36 };
  37
  38 /**
  39  * Describe the swizzling capability of target hardware.
  40  */
  41 struct rc_swizzle_caps {
  42         /**
  43          * Check whether the given swizzle, absolute and negate combination
  44          * can be implemented natively by the hardware for this opcode.
  45          *
  46          * \return 1 if the swizzle is native for the given opcode
  47          */
  48         int (*IsNative)(rc_opcode opcode, struct rc_src_register reg);
  49
  50         /**
  51          * Determine how to split access to the masked channels of the
  52          * given source register to obtain ALU-native swizzles.
  53          */
  54         void (*Split)(struct rc_src_register reg, unsigned int mask, struct rc_swizzle_split * split);
  55 };
  56
  57 #endif /* RADEON_SWIZZLE_H */