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/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#include "util/u_debug.h"
#include "pipe/p_shader_tokens.h"
#include "tgsi_parse.h"
#include "tgsi_build.h"
#include "tgsi_util.h"
union pointer_hack
{
void *pointer;
uint64_t uint64;
};
void *
tgsi_align_128bit(
void *unaligned )
{
union pointer_hack ph;
ph.uint64 = 0;
ph.pointer = unaligned;
ph.uint64 = (ph.uint64 + 15) & ~15;
return ph.pointer;
}
unsigned
tgsi_util_get_src_register_swizzle(
const struct tgsi_src_register *reg,
unsigned component )
{
switch( component ) {
case 0:
return reg->SwizzleX;
case 1:
return reg->SwizzleY;
case 2:
return reg->SwizzleZ;
case 3:
return reg->SwizzleW;
default:
assert( 0 );
}
return 0;
}
unsigned
tgsi_util_get_full_src_register_swizzle(
const struct tgsi_full_src_register *reg,
unsigned component )
{
return tgsi_util_get_src_register_swizzle(
®->SrcRegister,
component );
}
void
tgsi_util_set_src_register_swizzle(
struct tgsi_src_register *reg,
unsigned swizzle,
unsigned component )
{
switch( component ) {
case 0:
reg->SwizzleX = swizzle;
break;
case 1:
reg->SwizzleY = swizzle;
break;
case 2:
reg->SwizzleZ = swizzle;
break;
case 3:
reg->SwizzleW = swizzle;
break;
default:
assert( 0 );
}
}
unsigned
tgsi_util_get_full_src_register_sign_mode(
const struct tgsi_full_src_register *reg,
unsigned component )
{
unsigned sign_mode;
if( reg->SrcRegisterExtMod.Absolute ) {
/* Consider only the post-abs negation. */
if( reg->SrcRegisterExtMod.Negate ) {
sign_mode = TGSI_UTIL_SIGN_SET;
}
else {
sign_mode = TGSI_UTIL_SIGN_CLEAR;
}
}
else {
/* Accumulate the three negations. */
unsigned negate;
negate = reg->SrcRegister.Negate;
if( reg->SrcRegisterExtMod.Negate ) {
negate = !negate;
}
if( negate ) {
sign_mode = TGSI_UTIL_SIGN_TOGGLE;
}
else {
sign_mode = TGSI_UTIL_SIGN_KEEP;
}
}
return sign_mode;
}
void
tgsi_util_set_full_src_register_sign_mode(
struct tgsi_full_src_register *reg,
unsigned sign_mode )
{
switch (sign_mode)
{
case TGSI_UTIL_SIGN_CLEAR:
reg->SrcRegister.Negate = 0;
reg->SrcRegisterExtMod.Absolute = 1;
reg->SrcRegisterExtMod.Negate = 0;
break;
case TGSI_UTIL_SIGN_SET:
reg->SrcRegister.Negate = 0;
reg->SrcRegisterExtMod.Absolute = 1;
reg->SrcRegisterExtMod.Negate = 1;
break;
case TGSI_UTIL_SIGN_TOGGLE:
reg->SrcRegister.Negate = 1;
reg->SrcRegisterExtMod.Absolute = 0;
reg->SrcRegisterExtMod.Negate = 0;
break;
case TGSI_UTIL_SIGN_KEEP:
reg->SrcRegister.Negate = 0;
reg->SrcRegisterExtMod.Absolute = 0;
reg->SrcRegisterExtMod.Negate = 0;
break;
default:
assert( 0 );
}
}
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