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softpipe: Factor out evaluation of the source indices 

We will need these for per sample interpolation as well

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
This commit is contained in:
Gert Wollny 2019-04-24 09:28:46 +02:00
parent 7d5c8d3589
commit 5f0959f8df
1 changed files with 41 additions and 28 deletions
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69
src/gallium/auxiliary/tgsi/tgsi_exec.c
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@ -1613,13 +1613,11 @@ fetch_src_file_channel(const struct tgsi_exec_machine *mach,
}
static void
fetch_source_d(const struct tgsi_exec_machine *mach,
union tgsi_exec_channel *chan,
const struct tgsi_full_src_register *reg,
const uint chan_index)
get_index_registers(const struct tgsi_exec_machine *mach,
const struct tgsi_full_src_register *reg,
union tgsi_exec_channel *index,
union tgsi_exec_channel *index2D)
{
union tgsi_exec_channel index;
union tgsi_exec_channel index2D;
uint swizzle;
/* We start with a direct index into a register file.
@ -1629,10 +1627,10 @@ fetch_source_d(const struct tgsi_exec_machine *mach,
* file = Register.File
* [1] = Register.Index
*/
index.i[0] =
index.i[1] =
index.i[2] =
index.i[3] = reg->Register.Index;
index->i[0] =
index->i[1] =
index->i[2] =
index->i[3] = reg->Register.Index;
/* There is an extra source register that indirectly subscripts
* a register file. The direct index now becomes an offset
@ -1665,17 +1663,17 @@ fetch_source_d(const struct tgsi_exec_machine *mach,
&indir_index);
/* add value of address register to the offset */
index.i[0] += indir_index.i[0];
index.i[1] += indir_index.i[1];
index.i[2] += indir_index.i[2];
index.i[3] += indir_index.i[3];
index->i[0] += indir_index.i[0];
index->i[1] += indir_index.i[1];
index->i[2] += indir_index.i[2];
index->i[3] += indir_index.i[3];
/* for disabled execution channels, zero-out the index to
* avoid using a potential garbage value.
*/
for (i = 0; i < TGSI_QUAD_SIZE; i++) {
if ((execmask & (1 << i)) == 0)
index.i[i] = 0;
index->i[i] = 0;
}
}
@ -1688,10 +1686,10 @@ fetch_source_d(const struct tgsi_exec_machine *mach,
* [3] = Dimension.Index
*/
if (reg->Register.Dimension) {
index2D.i[0] =
index2D.i[1] =
index2D.i[2] =
index2D.i[3] = reg->Dimension.Index;
index2D->i[0] =
index2D->i[1] =
index2D->i[2] =
index2D->i[3] = reg->Dimension.Index;
/* Again, the second subscript index can be addressed indirectly
* identically to the first one.
@ -1723,17 +1721,17 @@ fetch_source_d(const struct tgsi_exec_machine *mach,
&ZeroVec,
&indir_index);
index2D.i[0] += indir_index.i[0];
index2D.i[1] += indir_index.i[1];
index2D.i[2] += indir_index.i[2];
index2D.i[3] += indir_index.i[3];
index2D->i[0] += indir_index.i[0];
index2D->i[1] += indir_index.i[1];
index2D->i[2] += indir_index.i[2];
index2D->i[3] += indir_index.i[3];
/* for disabled execution channels, zero-out the index to
* avoid using a potential garbage value.
*/
for (i = 0; i < TGSI_QUAD_SIZE; i++) {
if ((execmask & (1 << i)) == 0) {
index2D.i[i] = 0;
index2D->i[i] = 0;
}
}
}
@ -1743,11 +1741,26 @@ fetch_source_d(const struct tgsi_exec_machine *mach,
* by a dimension register and continue the saga.
*/
} else {
index2D.i[0] =
index2D.i[1] =
index2D.i[2] =
index2D.i[3] = 0;
index2D->i[0] =
index2D->i[1] =
index2D->i[2] =
index2D->i[3] = 0;
}
}
static void
fetch_source_d(const struct tgsi_exec_machine *mach,
union tgsi_exec_channel *chan,
const struct tgsi_full_src_register *reg,
const uint chan_index)
{
union tgsi_exec_channel index;
union tgsi_exec_channel index2D;
uint swizzle;
get_index_registers(mach, reg, &index, &index2D);
swizzle = tgsi_util_get_full_src_register_swizzle( reg, chan_index );
fetch_src_file_channel(mach,