tgsi_util.c File Reference

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Data Structures
union	pointer_hack
Functions
void *	tgsi_align_128bit (void *unaligned)
unsigned	tgsi_util_get_src_register_swizzle (const struct tgsi_src_register *reg, unsigned component)
unsigned	tgsi_util_get_src_register_extswizzle (const struct tgsi_src_register_ext_swz *reg, unsigned component)
unsigned	tgsi_util_get_full_src_register_extswizzle (const struct tgsi_full_src_register *reg, unsigned component)
void	tgsi_util_set_src_register_swizzle (struct tgsi_src_register *reg, unsigned swizzle, unsigned component)
void	tgsi_util_set_src_register_extswizzle (struct tgsi_src_register_ext_swz *reg, unsigned swizzle, unsigned component)
unsigned	tgsi_util_get_src_register_extnegate (const struct tgsi_src_register_ext_swz *reg, unsigned component)
void	tgsi_util_set_src_register_extnegate (struct tgsi_src_register_ext_swz *reg, unsigned negate, unsigned component)
unsigned	tgsi_util_get_full_src_register_sign_mode (const struct tgsi_full_src_register *reg, unsigned component)
void	tgsi_util_set_full_src_register_sign_mode (struct tgsi_full_src_register *reg, unsigned sign_mode)

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Function Documentation

void* tgsi_align_128bit

(

void *

unaligned

)

Definition at line 41 of file tgsi_util.c.

References pointer_hack::pointer, and pointer_hack::uint64.

{
   union pointer_hack ph;

   ph.uint64 = 0;
   ph.pointer = unaligned;
   ph.uint64 = (ph.uint64 + 15) & ~15;
   return ph.pointer;
}

unsigned tgsi_util_get_full_src_register_extswizzle	(	const struct tgsi_full_src_register *	reg,
		unsigned	component
	)

Definition at line 93 of file tgsi_util.c.

{
   unsigned swizzle;

   /*
    * First, calculate  the   extended swizzle for a given channel. This will give
    * us either a channel index into the simple swizzle or  a constant 1 or   0.
    */
   swizzle = tgsi_util_get_src_register_extswizzle(
      &reg->SrcRegisterExtSwz,
      component );

   assert (TGSI_SWIZZLE_X == TGSI_EXTSWIZZLE_X);
   assert (TGSI_SWIZZLE_Y == TGSI_EXTSWIZZLE_Y);
   assert (TGSI_SWIZZLE_Z == TGSI_EXTSWIZZLE_Z);
   assert (TGSI_SWIZZLE_W == TGSI_EXTSWIZZLE_W);
   assert (TGSI_EXTSWIZZLE_ZERO > TGSI_SWIZZLE_W);
   assert (TGSI_EXTSWIZZLE_ONE > TGSI_SWIZZLE_W);

   /*
    * Second, calculate the simple  swizzle  for   the   unswizzled channel index.
    * Leave the constants intact, they are   not   affected by the   simple swizzle.
    */
   if( swizzle <= TGSI_SWIZZLE_W ) {
      swizzle = tgsi_util_get_src_register_swizzle(
         &reg->SrcRegister,
         swizzle );
   }

   return swizzle;
}

unsigned tgsi_util_get_full_src_register_sign_mode	(	const struct tgsi_full_src_register *	reg,
		unsigned	component
	)

Definition at line 220 of file tgsi_util.c.

{
   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( tgsi_util_get_src_register_extnegate( &reg->SrcRegisterExtSwz, component ) ) {
         negate = !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;
}

unsigned tgsi_util_get_src_register_extnegate	(	const struct tgsi_src_register_ext_swz *	reg,
		unsigned	component
	)

Definition at line 176 of file tgsi_util.c.

{
   switch( component ) {
   case 0:
      return reg->NegateX;
   case 1:
      return reg->NegateY;
   case 2:
      return reg->NegateZ;
   case 3:
      return reg->NegateW;
   default:
      assert( 0 );
   }
   return 0;
}

unsigned tgsi_util_get_src_register_extswizzle	(	const struct tgsi_src_register_ext_swz *	reg,
		unsigned	component
	)

Definition at line 73 of file tgsi_util.c.

{
   switch( component ) {
   case 0:
      return reg->ExtSwizzleX;
   case 1:
      return reg->ExtSwizzleY;
   case 2:
      return reg->ExtSwizzleZ;
   case 3:
      return reg->ExtSwizzleW;
   default:
      assert( 0 );
   }
   return 0;
}

unsigned tgsi_util_get_src_register_swizzle	(	const struct tgsi_src_register *	reg,
		unsigned	component
	)

Definition at line 53 of file tgsi_util.c.

{
   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;
}

void tgsi_util_set_full_src_register_sign_mode	(	struct tgsi_full_src_register *	reg,
		unsigned	sign_mode
	)

Definition at line 261 of file tgsi_util.c.

References tgsi_src_register_ext_mod::Absolute, assert, tgsi_src_register_ext_mod::Negate, tgsi_src_register::Negate, tgsi_src_register_ext_swz::NegateW, tgsi_src_register_ext_swz::NegateX, tgsi_src_register_ext_swz::NegateY, tgsi_src_register_ext_swz::NegateZ, tgsi_full_src_register::SrcRegister, tgsi_full_src_register::SrcRegisterExtMod, tgsi_full_src_register::SrcRegisterExtSwz, TGSI_UTIL_SIGN_CLEAR, TGSI_UTIL_SIGN_KEEP, TGSI_UTIL_SIGN_SET, and TGSI_UTIL_SIGN_TOGGLE.

{
   reg->SrcRegisterExtSwz.NegateX = 0;
   reg->SrcRegisterExtSwz.NegateY = 0;
   reg->SrcRegisterExtSwz.NegateZ = 0;
   reg->SrcRegisterExtSwz.NegateW = 0;

   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 );
   }
}

void tgsi_util_set_src_register_extnegate	(	struct tgsi_src_register_ext_swz *	reg,
		unsigned	negate,
		unsigned	component
	)

Definition at line 196 of file tgsi_util.c.

{
   switch( component ) {
   case 0:
      reg->NegateX = negate;
      break;
   case 1:
      reg->NegateY = negate;
      break;
   case 2:
      reg->NegateZ = negate;
      break;
   case 3:
      reg->NegateW = negate;
      break;
   default:
      assert( 0 );
   }
}

void tgsi_util_set_src_register_extswizzle	(	struct tgsi_src_register_ext_swz *	reg,
		unsigned	swizzle,
		unsigned	component
	)

Definition at line 152 of file tgsi_util.c.

References assert, tgsi_src_register_ext_swz::ExtSwizzleW, tgsi_src_register_ext_swz::ExtSwizzleX, tgsi_src_register_ext_swz::ExtSwizzleY, and tgsi_src_register_ext_swz::ExtSwizzleZ.

{
   switch( component ) {
   case 0:
      reg->ExtSwizzleX = swizzle;
      break;
   case 1:
      reg->ExtSwizzleY = swizzle;
      break;
   case 2:
      reg->ExtSwizzleZ = swizzle;
      break;
   case 3:
      reg->ExtSwizzleW = swizzle;
      break;
   default:
      assert( 0 );
   }
}

void tgsi_util_set_src_register_swizzle	(	struct tgsi_src_register *	reg,
		unsigned	swizzle,
		unsigned	component
	)

Definition at line 128 of file tgsi_util.c.

References assert, tgsi_src_register::SwizzleW, tgsi_src_register::SwizzleX, tgsi_src_register::SwizzleY, and tgsi_src_register::SwizzleZ.

{
   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 );
   }
}

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